environment impact assessment report for n i ngbo j i...
TRANSCRIPT
E740 v.5March 2003
WB LOAN
Environment Impact Assessment Report forN i ngbo J i angdongnanqu WWTP & Sewerage Project
(for approval)
RESEARCH & DESIGN ACADEMY OF ENVIRONMENTAL PROTECTION OFNINGBO
National EA Certification: First Grade No.2004
March, 2003
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
Table of Division of responsibility for EnvironmentImpact Assessment of Ningbo Jiangdongnanqu WWTP &
Sewerage Project
Ningbo Jiangdongnanqu WWTP & SewerageProject Name Project
Project Document Environment Impact Assessment Report
Classification Public utility engineeringof the project
Commission Ningbo Urban Infrastructure Developmentunit. Office
Commissioned Research & Design Academy of Environmentunit Protection of Ningbo
Assessment No.2004,First Grade, NationalCertification Environment Assessment
Dean, Legal Jin Jianqiangperson
Principal ofimplement agency Liu ZhongProj ectPrijci Pan Peifeng (Post No,A20040027)principal
Technical Liu Zhong (Post No.A20040004)auditing Zhao Yongcai (Post No.A20040018)
Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
Main Participants and Their Titles
Name Specialty Title Post No.
Bi Yulong Environmental Senior engineer A20040006chemistry
Shang Weichun Environmental Engineer A20040022Engineering
EnvironmentalLuo Deyu Engineeng Engineer A20040016
Engineering
Bao Wihong Environmental Egne 2000Bao Wihong Engineering Egne 2000
Pan Peifeng Ecological Engineer A20040027. ~Entironment
Wu Wenjun Environmental Engineer A20040011software
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
Contents
1 FOREWORD ...................................................... 7
1.1 BACKGROUND .................. 71.2 OBJECTIVES OF THE EIA .................. 81.3 BASIS FOR THE EIA ................ 91.4 SCOPE OF THE EIA ................ 91.5 ASSESSMENT STANDARDS .. 10
1.5.1 Environmental Quality Standard ................................................... 101.5.2 Pollutants Emission Standards ..................................................... 1 ]
1.6 ENVIRONMENTAL PROTECTION OBJECTIVES . ........................................ 121.7 STAGES OF EIA ..................................................... 121.8 MAIN TECHNOLOGY AND METHODS ADOPTED IN EIA ............................ 131.9 BRIEF INTRODUCTION TO THE INSTITUTION CONDUCTING THE EIA ... 13
2 PROJECT DESCRIPTION ..................................................... 15
2.1 BASIC CHARACTERS OF THE PROJECT ................................. 152.2 COMPONENTS OF THE PROJECT ..................................................... 16
2.2.1 Discharge Networks anid Pumping Stations ................................... 162.2.2 WWTP Engineering ..................................................... 26
2.3 SEWAGE TREATMENT PROCESS ....................................... 422.4 SEWAGE VOLUME AND CONSTRUCTION CAPACITY . . 47
2.4.1 Current Sewage Discharge ..................................................... 472.4.2 Forecast on Designed Sewage Volume .......................................... 482.4.3 Designed scale of the treatment plantError! Bookmark not defined.
2.5 SEWAGE DISPOSAL GRADE ..................................................... 512.5.1 Sewage quality ..................................................... 512.5.2 Design Sewage Quality ............................... ...................... 682.5.3 Degree of Treatment ........................................... 68
2.6 PROJECT MANAGEMENT AND IMPLEMENTATION PLAN . . 682.6.1 Principle and Procedures for Implementation ............... ................ 692.6.2 Project Construction Management Institution ............................... 69
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
2.6.3 Project Operation Management .................................................... 70
2.6.4 Schedule of Project implementation .............................................. 71
2.7 PROJECT CONSTRUCTION MANAGEMENT . ............................................. 74
2.7.1 Construction Period ................... ................................. 74
2.7.2 Construction machines .................................................... 74
2.7.3 Main Earthworks ................ .................................... 74
2.8 POLLUTION SOURCES ANALYSIS OF THE PROJECT . . 74
2.8.1 Pollution Source Analysis in the Operation Stage ............ ............. 74
2.8.2 The analysis of the pollution sources during the operation period 77
3 SURVEY OF THE ENVIRONMENT ................................................... 78
3.1 NATURAL ENVIRONMENT .......................................... 78
3.1.1 Geographical Position ........................ ............................ 79
3.1.2 Topography and Physiognomy .................................................... 79
3.1.3 Meteorology .................................................... 81
3.1.4 Ground water .................................................... 81
3.1.5 River System .................................................... 82
3.2 SURVEY OF ENVIRONMENT ......................................... 843.3 SOCIAL ENVIRONMENT ............................................ 85
3.3.1 Introductiont to the city ........................ ............................ 85
3.3.2 Territorial division and population ............................................... 86
3.3.3 Industry .................................................... 86
3.3.4 Agriculture .................................................... 87
3.3.5 Infi-astructure .................................................... 87
3.3.6 Public utilities .................................................... 89
3.4 LIVING STANDARD .................................................... 90
3.5 CURRENT ENVIRONMENTAL STATUS .................................. 91
3.5.1 Water environment status ...................................... .............. 91
3.5.2 Ambient Air .................................................... 141
3.5.3 Acoustic Environment .................................................... 144
3.6 ECOLOGICAL ENVIRONMENT ...................................... 145
3.7 CURRENT STATUS SURVEY ON INDUSTRIAL POLLUTION SOURCES
AROUND .................................................... 146
4 ANTICIPATIVE ENVIRONMENT IMPACTS AND PREVENTIONAND ABATEMENT MEASURES .152
4.1 ENVIRONMENTAL IMPACTS PROJECTION AND PREVENTION AND
ABATEMENT MEASURES FOR SURFACE WATER ................................................ 152
4.1.1 The Environment impact of surface water in the construction stage
.............................................................................. 152
4.1.2 The projection of the environmental impact on surface water in
operation stage and measures for prevention and abatement 153
4.2 IMPACT ON AMBIENT AIR PROJECTION AND PREVENTION AND ABATEMENT
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
MEASURES.~~~~~~~~~~~~~~~~~~1 77M EA SU RES ............................................................................... 1774.2.1 . Impact on ambient air and prevention and abatement measures inthe construction stage ...................................................... 1774.2.2 Ambient Air Environmental Impact and Measures for Preventionand Abatement in the Stage of Operation ................................................ 178
4.3 ACOUSTIC ENVIRONMENTAL IMPACT PROJECTION AND MEASURES FOR
PREVENTION AND ABATEMENT ...................................................... 184
4.3.1 Acoustic environmental impact and mitigation measures ............ 1844.3.2 The impacts on acoustic environment and mitigation measures .. 186
4.4 SOLID WASTES ENVIRONMENTAL IMPACT ANALYSIS AND MITIGATION
MEASURES ...................................................... 1894.4.1 . Solid wastes environment in the construction stage and mitigationimeasures ...................................................... 1894.4.2 . Solid wastes impact in the operation stage and mitigationmeasures ...................................................... 190
4.5 IMPACTS ON SOCIAL ENVIRONMENT ANALYSIS AND MITIGATION
MEASURES ...................................................... 1924.5.1 Social environment impacts in the construction stage and mitigationmeasures ...................................................... 1924.5.2 Social Environmental impact in the operation stage ................... 199
4.6 ECOLOGICAL ENVIRONMENTAL IMPACT ANALYSIS AND MITIGATION
MEASURES ...................................................... 2004.6.1 Ecological environmental impact in the construction stage andm itigation m easures ...................................................... 2004.6.2 . Ecological environmental analysis in the operation stage andmitigation measures ............................................... 200
4.7 ANALYSIS OF ACCIDENTAL RISK .................................... 2014.7.1 Pumping unusable ...................................................... 2024.7.2 The Accidental discharge of the effluent of the WWTP ................ 2024.7.3 . Dehydrated sludge Centralized Landfill .................................... 2034.7.4 adding chlorine risk ...................................................... 195
5 ALTERNATIVE SCHEMIES .. ........ .. 204
5.1 SITE OF THE WWTP SELECTION ...................................................... 2045.2 SEWAGE TREATMENT PROCESS SCHEMES ........................................... 206
5.2.1 Brief description of the schemes .................................................. 2065.2.2 . Alternative Scheme ...................................................... 206
6 PUBLIC PARTICIPATION ...................................................... 209
6.1 OBJECTIVE AND METHOD ...................................................... 2106.1]. ssurvey objectiv ...................................................... 2016.1.2 survey priciple ...................................................... 2026.1.3survey methord ...................................................... 203
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
6.1.4 survey organization ............................. 2046.2 THE FIRST PUBLIC PATICIPATION .. .......................... 211
6.2.1 survey content ............................. 2116.2.2 Survey result ............................. 211
6.3 THE SECOND PUBLIC PATICIPATION .......... .. ................ 211
6.3.1 Survey content ............................. 2116.3.2 Survey Results ............................. 212
6.3 FINAL SURVEY RESULTS .......................................... 211
7 ENVIRONMENTAL ECONOMIC BENEFIT AND LOSS ANALYSIS....................................................................................... ...........................217
7.1 ECONOMIC BENEFIT . 218
7.2 ENVIRONMENTAL BENEFIT ...................................................... 219
7.2.1 Cost Estimation of Main Environmental Protection Measures .... 219
7.2.2 . Environmental benefit and loss analysis .................................... 2197.3 SOCIALBENEFIT ...................................................... . 220
8 ENVIRONMENTAL MANAGEMENT AND ENVIRONMENTALMONITORING PLAN ........................................................ 222
8.1 ENVIRONMENTAL MONITORING PLAN ................................................. 222
8.1.1 Environmental Monitoring Plan for Surface Water ......... ............ 2238.1.2 Sludge Monitoring Plan .......................................................... 2238.1.3 Sewage water quality monitoring plan .................. ...................... 223
8.2 ENVIRONMENTAL MANAGEMENT ........................................................ 224
S. 2. 1 Institution and personnel .......................................................... 2248.2.2 The responsibility of the Division ................................................ 2248.2.3 . Implementation of environmental management and monitoringplan ....................................................... 2258.2.4 Setup Insulation Belt ........................... ........................... 2258.2.5 Setup navigation marks and anchor ban marks above bottompipeline and outfall ...................................................... 225
9 CONCLUSION AND SUGGESTION .227
9.1 CURRENT ENVIRONMENTAL STATUS CONCLUSION . .227
9.1.1 Ambient Air .2279.1.2 Surface Water Environment .2279.1.3 Acoustics Environment .2279.1.4 Ecological Environment .228
9.2 POLLUTION SOURCES OUTPUT . .228
9.2.1 Effluent Discharge of WP. .2289.2.2 Solid waste of WWTP .228
9.3 ENVIRONMENTAL IMPACT CONCLUSION . .228
9.3.1 Ambient Air .2299.3.2 Water Environment .229
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
9.3.3 Acoustic Environment ..................................................... 2309.3.4 The solid waste ..................................................... 2309.3.5 Social Environment ..................................................... 231
9.4 CONCLUSION FOR POLLUTION PREVENTION AND ABATEMENT AND
MITIGATION MEASURES ..................................................... 231
9.4.1 Prevention and abatement measures for surface water pollution. 2319.4.2 Prevention and abatement for ambient air pollution ................... 2329.4.3 Prevention and abatement measures for acoustic environment .... 2329.4.4 Solid waste impact and prevention and abatement measure ........ 2339.4.5 Prevention and abatement measures for social environmentalim pact ..................................................... 2339.4.6 Ecological environmental pollution and prevention abatementmeasure ...................................................... 233
9.5 ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN ................. 234
9.5.1 Environmental monitoring plan ................................................... 2349.5.2 Environment Management ..................................................... 234
9.6 FINAL CONCLUSION ..................................................... 234
10 REFERENCE
11 APPEND FILES
1 Foreword
1.1 Background
Ningbo is one of the earliest coastal cities opening to the outside world approved by the
State Council. With economic growth and development of the urban construction, the urban
area has been expanded and population has been increased continually .The issue of water
quality deterioration of water bodies of inland rivers and Yong River has become more and
more serious due to discharges of industrial and domeatic sewage , and such condition has
endangered the surface water quality and marine water quality in shore. The existing
Jiangdongbeiqu WWTP only has a capacity of 100000m3/d, which is far from meeting the
demand of the city development. According to the Urban Master Planning, up to 2005, the
total volume of sewage in the central city will be 840000 tons, of which Sanjiangpian Area
has the sewage volume of 520000 t/d, and the sewage treatment ratio will be 40%. Therefore,
it is obvious very important to build new WWTPs and reconstruction of the sewage network
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
in the urban areas.
For the purpose, the city government decided to build Ningbo Jiangdongnanqu WWTP
and Sewerage Project with loan of 26.127 million USD from the World Bank The total
investment of the project is 402.11 million RMB; except for the World Bank loan, the rest
part will be raised by the city government The sewage treatment capacity will reach to
160000m3/d after the project finished .The project will play a positive role for increasing
sewage treatment ratio, reducing pollutant load, improving the surface water environment
quality and investment environment of the city .
According to the "Environment Protection Law of PRC" and "Environmental
Management Rules for Construction Project", No. 253 Order issued by the State Council in
November 1998.and Check-list of Construction Project for Environment Classification
Management (First batch), the project is required to prepare EIA.
Based on "Notice on Strengthening Environmental Impact Assessment Work in
Construction Projects Financed by International Financial Organizations" No. (1993) 324
issued by SEPA, and World Bank Operational Directives: (OP4.01) Our academy was
entrusted by Ningbo Urban Infrastructure Development Office to prepare the report of
"Preliminary Feasibility Study Report on Environment Impact of Ningbo Jiangdongnanqu
WWTP and Sewerage Project " and "Preliminary Assessment of the Environment Impact
for Ningbo Jiangdongnanqu WWTP and Sewerage Project " .The potential environment
impacts have been assessed on the above reports .The assements mainly focused on the
issues of the impact of discharges on water body functions, impact of foul smell of the
WWTP .sludge disposal and improvement of urban environment.
Based on this, we have prepared the report of the Environment Impact Assessment for
Ningbo Jiangdongnanqu WWTP and Sewerage Project for appraisal and examination by the
World Bank Mission and domestic superior Environmental Protection Departments.
1.2 Objectives of the EIA
The purpose of the assessment: (1) Clarify the current status of the environment quality
in the project construction area through survey and monitoring in the range of the assessment
area; (2) Obtain the information on sewage of the city and incoming sewage quality of the
WWTP through monitoring to the sewage quality of the city; (3) Determine the source
intensity of discharged pollutants of the WWTP through engineering analysis and then on the
basis of this to analyze and project the impacts of them on the ambient environment after the
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
project start up so as to put forward prevention and abatement measures ;(4) A feasibility
study to be conducted from the environmental point of view on the issues of project site
selection ,sewage treatment capacity ,site of outfall and discharge types through above work
so as to provide basis for the project decision-making ,engineering design and environment
management.
1.3 Basis for the EIA
1, "Environmental Management Rules for Construction Project", No. 253 Order issued
by the State Council in November 1998;
2. " Technical Guideline for EIA" (HJ/T2.1-2.3- 1993)
3, Technical Guideline for EIA" HJIT2.1-2.3-93, T2.4-95.HJ/T2.4-1995
4, Technical Guideline for EIA" HJ/T19-1997;
5. "Master Plan for Urban Development of Ningbo"
6, "Environmental Function Zoning of Surface Waters in Ningbo Municipality " By
Ningbo Municipal Environment Protection Bureau ,Nov.,1992
7. "Implementation opinions on Environmental Management Rules for Construction
Project", No. 165 [1999] issued by Zhejiang Provincial Environment Protection Bureau in
May, 1999
8. " Issues on Environmental Management for Construction Projects" No.117 [88]
issued by SEPA
9. "Notice on Strengthening Environmental Impact Assessment Work in Construction
Projects Financed by International Financial Organizations" No. (1993) 324 issued by SEPA,
State Planning Commission, Chinese Ministry of Finance and People's Bank of China.
10. "World Bank Operational Directives:" (OP4.01)
11. "Preliminary Feasibility Study Repot for Ningbo Jiangdongnanqu WWTP and
Sewerage" by ENFI 2002.20
12. "Entrust Letter of EIA Work for Ningbo Jiangdongnanqu WWTP and Sewerage
project "issued by Ningbo Urban Infrastructure Development Office on 29/12/1999
1.4 Scope of the EIA9
Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
The scope of surface water assessment ranges from Panshidu of Fenghua River to
Zhenhai estuary of Yong River with a total length of 45 km; scope of air assessment is within
the range of 500 m from the plant boundary; Noise assessment is with 200m from the plant
boundary and 50m from the sewage pumping stations .The scope of social survey includes the
sewerage and service area, mainly in Haisu district and south of Jiangdong district The key
area is I km surrounding of the WWTP.
1.5 Assessment Standards
Based on the regional environmental protection objectives, environment function zoning
and characters of engineering, the following assessment standards are adopted:
1.5.1 Environmental Quality Standard
(1) Ambient Air Quality Standard
According to air function zoning, Class II standard prescribed in " "Ambient Air
Quality Standard" GB3095-1996 is adopted in project area. "The Maximum Permissible
Concentrations for Pollutants in Ambient Air in the Residential District" is adopted for H 2S
and N3H. (See table 1-1 for details)
Table 1-1 Ambient Air Quality Standard (mg/m 3)
Class IIPollutants Per hour Daily Annual Basis
averagaverage average erag
SO2 0.50 0.15 0.06 Class II,NO 2 0.24 0.12 0.08 B0519TSP - 0.30 0.20 GB3095-1996H 2 S 0.01 TJ36-79 Air
standard inN3H 0.2 - - residential area
(2) Surface Water Quality Standard
Class III of " Surface Water Environmental Quality Standard " GB3838-2002 is
adopted for inland rivers and Fenghua River (Fanshidu-Tongpenpu section); Class IV of
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
"Surface Water Environmental Quality Standard " GB3838-2002 is adopted for Fenghua
River (Tongpenpu-Sanjiangkou section ) and Yong River. See Table 1-2 for details:
Table 1-2 Surface Water Quality Standard Unit: mg/l ( except pH )
Item Class Ill ClassIVPermanent value 6 10
CODcr< 20 30DO> 5 3
BOD 5< 4 6PH 6.5 8.5
Ammonia nitrogen < 0.5 1.0Cr < 0.05 0.05Oil< 0.05 0.5
(3) Environmental Noise Standard
The Class 3 of "Urban District Environmental Standard" GB3096-93 is adopted in the
WWTP site i.e. equivalent sound level (LAeq), 65 dB on daytime, 55dB at nighttime. Class 4
standard is adopted in the north boundary nearby the expressway, i.e. 70 dB on daytime and
55 dB at nighttime .The sewage pumping stations are located at the banks of Yong River and
Fenghua River Separately, and Class IV standard is adopted in the areas.
1.5.2 Pollutants Emission Standards
(1) Waste Gas Emission Standard
Class 2 of "Malodor Pollutants Emission Standard" GB 145593 is adopted for the
WWTP (for newly built or expansion projects) See Table 1-3 for details:
Table 1-3 Malodor Pollutants Emission Standard
Control items Unit Class 2 (newly built3___________ _ or expansion)
Ammonia Mg/M3 1.5Sulfured hydrogen Mg/m 3 0.06
Concentration Dimensionless unit 20
(2) Standards for Influent Sewage and Effluent Discharges
Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
" Quality of Sewage discharged into the Urban Sewers Standard" Cj 3082-1999 is
adopted for the influent sewage of the WVVWTP; "Integration Sewage Discharge Standard"
GB 8978-1996" is adopted for effluent after treatment .See Table 1-4 for details:
Table 1-4 Standards for Influent Sewage and Effluent Discharge
(unit: Mg/i)
Standard pH CODc BOD SS NH3-N Photsepha
CJ3082-1999 6.0-9.
GB8978-1996 6.0-9. 120 30 30 25 1.0C lass 2 0 _ _ _ _ _ I_ _ I__ _ _ _ _
The discharge of sludge of the WWTP will implement "Sewage and Sludge Discharge
Standard for Urban WWTP" CJ3025-93.
(3) Noise Control Standard
Construction Stage : "Noise Limit Value for Construction Site Boundary"
GB 12523-90 is adopted.
Operation Stage : Class III of "Noise Standard On Factory Boundary for Industrial
Enterprises" is adopted i.e. 65dB on the daytime and 55 dB at nighttime.
1.6 Environmental Protection Objectives
The project environment project objectives are shown in table 1-5:
Table 1-5 Environment Protection Objectives in Assessment Area
Protection Objectives Main characterLingjia Village About 100 householdsInland Rivers Class III
Ambient air quality Class II
Fenghua River Class IV
Environment Noise Class III
1.7 Stages of EIA
Construction stage: from the start construction to the operation of the project.
Operation stage: Sewage collected and treatment (2006-2010)
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
1.8 Main technology and methods adopted in EIA
1) Matrix method is adopted for identify environment impact factors and
assessment factors filtration; the assessment factors will be determined
according to identification, filtration to various aspects such as the scope
of the affected area, affected extent and factors and etc.
2) The engineering information of the project will be used for Engineering
analysis;
3) The assessment of current status will use both the existing monitoring
results and monitoring results on site;
4) Mathematical models will be used for impact projection
1.9 Brief Introduction to the institution conducting the
EIA
The EIA has been prepared by Research & Design Academy of Environmental
Protection Science of Ningbo (It is also call NEAS for short) and it grew out
of Ningbo Industrial Scientific Research Institute, which was founded in 1958.
In 1987 it incorporated with Institute of Environmental Protection Science of
Ningbo and began to use the present name. NEAS is an integrated environment
protection scientific research institution covering the areas of EIA,
environmental engineering design, development of new technology and products
of environmental protection, project contract and supervision and analysis
testing.
It has considerable advanced scientific and testing equipment and computer
network. The main scientific research work on environmental field conducted by
the institution includes: EIA of construction projects, environment pollution
prevention and abatement engineering design, ISO 14000 consultation,
development and extension of environment protection technology, new materials
and equipment, environmental project contract and supervision, software
development on environment monitoring, EIA and etc. There is over 60 staff in
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Environment Impact Assessment for Ningbo Jiangdongnanqu WWTP & Sewerage Project
the unit, of whom, professional technician's accounts for 90%; 56% of them have
senior titles .The specialty structure of the technicians is reasonable.
NESA has national first grade certification (No.2004) and it has the qualification for the
following business scope: surface water, ground water, marine water, gas. acoustics, solid
wastes. zoology, water and soil conservation, social economy, human health; light industry,
textile, chemical fibers, chemical engineering, petrochemical and pharmacy; machinery,
electronics; transportation; ocean and coast engineering; construction, public utilities and etc.
The middle and large scale projects carried out by the institution cover areas of chemical
industry, expressway, airport, seaport, bridge, railway, urban sewage treatment, garbage
landfill, sea-route integrated rehabilitation and etc., and there are many successful examples,
such as: Jiangdongbeiqu WVWTP, Yuyao Urban Domestic Garbage Landfill, Ningbo section
of Hangzhou-Ningbo Canal, 40000 tons shipbuilding project of Zhejiang Dockyard,
Xiangshan Link of Nation Coastal Line Highway Project, 50000ABS t/y project of Ningbo
LG Chemical Co. Ltd ,Second Phase Project of Ningbo Lishe Airport .Changhong Tunnel and
etc .
NESA has five national patents and it has been honored with the title of provincial
advanced unit for environment protection for many years and been awarded the name of
advanced scientific research unit of Ningbo .It is a municipal advanced unit named by the
municipal authorities.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
2 Project Description
2.1 Basic Characters of the Project
Name of the project: Ningbo Jiangdongnanqu WWTP & Sewerage Project
Character of the construction: Newly built
Project investment: The total investment is RMB 402.11 million (including RMB 38.08
million for preliminary land acquisition and resettlement cost), of which, construction cost is
RMB 283.84 million (RMB 135.92 million for WWTP and RMB 147.9 million for the
sewerage) and the other cost is RMB 118.28 million.
Source of fund: It is planned to use the World Bank loan of USD 26.13million converting
into RMB216.59 million .The rest fund will be raised from the construction capital of the city.
Construction content and capacity: It is planned to build Jiangdongnanqu WWTP and
sewerage which covers a land area of 11.32 hectares in the first phase of the project and the
proposed wastewater treatment capacity is 160000/d. The service range includes southwest
part of Sanjiangpian, Center district of Yin County, Ci Cheng Town, Dongqian Lake Town
and surrounding area of Dongqian Lake .The treatment standard is secondary and A/O
dephosphorization process is to be adopted. Tail water after treatment is discharged into
Fenghua River. While carrying out the construction in Phase I of the project, more spaces
shall be reserved for expanding the capacity to 400000m3/d in the Phase II of the project.
The sewerage includes construction of some 43.22 km of new trunk including two river
crossings with total length of 0.6km. New sewers will constructed in the following locations:
South Jiangdongnan Road, Jichang Road, Xingning Road, Baiyun Road ,Huanchengnan Road,
Yinfeng Road and Huanchengnan Road, rehabilitation of part of the existing combined trunk
sewers network. With the renovation of the sewer network ,three sewage lift pumping stations
will be renovated, i.e. Ningzhong Sewage pumping station and Wudongzha pumping station
and Huanzhengnan Road Sewage Pumping Station, The sewage networks construction of the
center district of Yin County, Ci Cheng Town, Tongqian Lake and surrounding area is shown
on the FSRs of each subproject.
Construction location: The project is located at southern part of Jiangdong District of
Ningbo on the south side of Hangzhou-Ningbo Expressway and east side of Fenghuan River.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
See geographical position drawing for details,
Personnel: The fixed number of persons for the WWTP is 70 and 140 for sewerage
outside the plant.
Discharge outlet: The treated effluent will be discharged into the Fenghua River. The
control objective of the water body is Class IV.
Raw water quality : BOD5: 120mg/L, CODcr:240mg/L, SS: l50mg/L, NH3-N:30mg/L,
TP:4mg/L0
Treated effluent : BOD5< 30mg/L, CODcr:< 120mg/L, SS< 30mg/L, NH3 -N<
2.5mg/L, TP< 1.Omg/L.
Sludge outlet: The treated sludge can be transported to landfill site for disposal.
2.2 Components of the Project
2.2.1 Discharge Networks and Pumping Stations
2.2.1.1 Service scope
The service scope of Jiangdongnan District Sewage Treatment Plant consists of six water
discharge systems. i.e. Ningzhongpian subsystem, Wudongzhapian subsystem,
Huanchengnanlu subsystem, Xiwaihuan Road subsystem, Yin County central area subsystem,
Cichen, town subsystem.
The service scope of Ningzhongpian subsystem covers about 2.72km2 along Jiefang
Road; about 1.88km2 along Changchunl Road and Lingqiao Road, with water catchment area
of about 4.61km2 and service population of 53000.
The service scope of Wudongzha area subsystem covers the west of Caihongnan Road,
east of Fenghua River, west of Zhongxing Road, south of Zhongshandong Road and north of
Xingning Road, with water catchment area of about 5.6km2, and service population of 71000.
Service scope of Xiwaihuan Road subsystem covers 8.1km2 along Xiwaihuan Road,
7.8km2 along Huanchengxi Road and 2.6km 2 along Yinfeng Road, with total water
catchment area of about 18.5km2. In addition, a branch sewer pipeline, which carries sewage
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
with volume 100OOm 3 /d from Cicheng Town, links into main at north Xiwaihuan Road,
Service scope of Huanchengnan Road subsystem covers east of Fenghua River, west of
Dongwaihuan Road, along Huanchengnan Road, including 1.79km2 along Jinagdong Road
and 4.9 1km2 along Huanchengnan Road, with water catchment area of about 6.72km2 and
service population of 67000.
Service scope of Yin County central area subsystem covers Zhongguanmiao Town,
Shiqianz Town and XiayingTown , with water catchment area of about 30km2 .
Service scopes of Cicheng town and Dongqianhu town are detailed in each sub-project
FSRs.
2.2.1.2 schemes of sewerage Building network
The objective of sewerage network transformation engineering is:
(I)To transform the current discharging status of urban sewerage
Since there is no WWPT in the area of jingdongnanqu, sewage of the old urban area
either discharge directly into the nearby area of rivers or concentrate into pump station, then
fluent into Fenghua River by lifted pump. For exemple, Now, Ningzhong Pump Station is a
combined branch pump station where sewage discharge into the inner river by lifted pump;
Wudongzha Pump Station is a sewage pump station where sewerage discharg into rivers by
lifted pump. The sewage pump station of Huanchengnan Road is built in a new area where
both rain and sewage discharge network fully developed. Howerer, the water has been
contaminated seriously by those sewage discharged at random whice cause the water quality
of Ningbo Three-river area can not reach the standards. By the time the engineering is
built ,the sewage in the area of Jiangdongnan Road should fluent orgnizedly into waste water
treatment plant and discharge into Fenghua River after being treated. The health and invest
environment of NingBo should be improved greatly.
(2) To build the separate system
To match the implement of the road transformation and newly building sewerage
network, the separate system of sewerage network should be achieved basicly. The
engineering implement such as Jiefang Road, Zhongshan Rode, Renmin Road and Baizhang
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Road achieve the goal of the separate system of sewerage network. Howerer, sewage
combined rain systems are general in the old urban area because those engineerings can not be
finished at once. the separate system of sewerage network should be achieved in the old urban
area, especially the main trunk with the implement of the transformation of the network.
The objective of this phase engineering is to improve the city discharge network into
which both the residence and industrial sewage fluent in this functional area and ensure the
WWTP proper working. achieve the separate system of sewerage network successfully to
portect ecological environment.
This phrase engineering schemes of the sewerage network transformation and the main
trunk is made according to "Master Plan for Urban Development of Ningbo" , combined
with the location of WWPT and the characters of the current sewerage network stutas. The the
main trunk sewerage network should be transformed firstly, then the branch trunk by which
sewage dischage into the new main trunk so as to gather as much as sewage into the plant;
Transform the Ningzhong Pump Station andWudongzha Pump Statio and build the new pump
station of Wangchun and Choubi; The main trunk should be built near pump stations to lower
the head of pumps, the consumption quantity of electrity and the lenth of discharge pipes.
According to above principle, the main trunk should be designed at Jiangdongnan Road
to gether sewage nearby this area and of the five pump stations. Transform the main trunk of
the old urban area and increase the secondary sewage trunk in the newly building area such as
Xiwaihua Road, Yinfeng Road, Huanchengnan Road and Baiyun Road. Since the new urban
area of Xiwaihuan Road and Huanchengnan Road develop fastly, some exeed field should
be left when building the main trunks of Xiwaihuan Road, Huanchengnan Road and the
Choubi Pump Station near Huanchengnan Road.
2.2.1.3 Sewerage Network Engineering
1. Layout of Trunk Sewer
The pipe network construction consists of two parts, one is the renovation of combined
sewer and the other one is lying of new trunk sewer. The renovation for combined sewer
covers Lingqiao Road trunk sewer, all branch-trunk sewers within Ningzhong and
Wudongzha areas The section to be newly built covers river-crossing sewer for Ningzhong
combined sewage pump station, east trunk sewer of Xingninglu, Jiangdongnan Road trunk
18
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAsewer, Xiwaihuan Road trunk sewer, Baiyunlu sub-trunk sewer, Yinfenglu trunk sewer,
Huanchengnanlu trunk sewer, river-crossing sewer of Huanchengnanlu sewage pump station
and main sewer to the sewage treatment plant.
Pipe network in Yin County central area is not included in this project scope, and design
for that part has been completed and implementation of the design is being carried out.
Pipe networks in Cicheng town and Dongqian Lake town is shown in their sub-item
project reports.
Trunk sewer for pipe network renovation is shown in Table 2-1
Table 2-lTrunk Sewer for new construction
DiameterNo. Sewer Start - end Length (m)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _(m m )
Zhenming Road - Jiefangnan 350 800
1 Changchunl Road
u Road Jiefangnan Road - Ningzhong 80 l00
pump station
PipelineNingzhong pump station -
2 crossing 170x2 700. ~~~Jiangdongnanlu
river
Xinhe Road - Wudongzha 534 700
pump station
Wudongzha pump station - 485 1400
Fenghua River railway bridge
Fenghua River railway bridge - 701 lS00
3 Jiangdongna Qiwen Road
n Road Qiwen Road - plan 6666 1600
Nanwaihuan Road
Plan Nanwaihuan Road - 5520575 2200
Highway
Highway - Sewage treatment 1194 2200
station
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
East of Fenghua River Rive - 848 500
4 Qiwen Road Jiangdongnan Road
Plan road - Jiangdongnan Road 905 1100
Chenxiang - Yinjiang Road 204 400
Yinjiang Road -453 500
Chenglangnan Road
Chenglangnan Road - 314 600
Yinfeng Yongchunxiang
5 Road Yongchunxiang - Qiwen 1143 800
Village
Duantang Station - Duantang 187 300
town
Duantang town - Shundelu 223 400
Shundelu - Qiwen Village 456 500
Yaojiang south bank - 780 1000
Huangchengbei Road
Huangchengbei Road - Tongtu 641 120
Road
Tongtu Road - WangchunXiwaihuan 868 1200
6 RoadRoad
Wangchun Road - Lantian 859 1500
Road
Lantian Road - Lianfeng Road 519 1500
Lianfeng Road - NanwaihuanRoad ~~1762 1500Road
7 Wangchun Current section 631 600
Road Wangchun Road 591 600
Lanti an8 Roan Current section 795 300
Road
9 Nanwaihuan Xiwaihuan Road - Baiyun Road 659 1800
Road Baiyun Road - Huangchengxi 882 2000
Road
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Ningbo Jiangdongnanqu WVTP and Sewerage Project EIA
Huangchengnan Road sewage
pump station - Jiangdongnan 756 2000
Road
Plan Nanwaihuan Road - west599 500
section of Jiangdongnan Road
Nanwaihuan Dongwaihuan Road - Qioubi 1831 900
Road pump station
Qioubi pump station - 3350 1000
Jiangdongnan Road
Pipeline Huangchengnan Road sewage10 crossing . . 260 1600
river pump station - Jiangdong
South bank of Xitanghe - plan 163 300
Xiao Road
plan Xiaolu - Lantianlu Road 422 400
Lantian Road - Lianfeng Road 398 400
Baiyun Lianfeng Road - Zuguanshan 547 400
Road Road
Zuguanshan Road - Qixiang 193 300
Road
Qixianglu - Qiwenlu 353 300
Qiwenlu - Nanwaihuan Road 702 400
2 Summary of the construction for main trunk sewer in current phrase
(1) Trunk sewer in Xiwaihuan Road
Xiwaihuan Road is a main road in Ningbo, which lies in west of the city, crossing north
to south. Trunk sewer will be laid in the green belt of west Xiwaihuan Road, whose service
range covers within west to Baiyunlu, south, to Beiwaihuanlu, north to Hangzhou-Yong River
express highway, carrying domestic sewage and industrial sewage. Compressive main sewer
pipe with diameter 600mm of Citing Town and sewer pipe with diameter 1000mm of
Zhongshanxilu link into this trunk, then it connects general trunk sewer of Nanwaihaunlu.
Trunk sewer in Xiwaihuan Road is 6980m long in total, collecting sewage area of
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
1348ha and sewage from Cicheng Town with flux of 134.1L/s. the diameter of trunk sewer
pipe varies from DNIOOO to DN1600. The designed maximum flux is 1509L/s, with a slope
varying 0.0006-0.0008.
This trunk sewer will be constructed by excavation method in the section of north
Huanchengbeilu, the section from Zhongshanlu to Nanwaihuan Road, with designed burying
depth of 3.15-3.97m. The soil texture in these sections is good, without influence from
ground water. The foundation of pipe adopt cushion with grouted rubble and pipe base with
concrete, and the groove can be supported with steel-plate pile according to sand quality. The
design depth for section from Huanchengbeilu to Zhongshanlu is 4.17-5.53m, which is so
deep that leading to much influence by ground water, and the push-pipe construction method
is suggested.
(2) Trunk sewer in Baiyunlu
Baiyunlu is an urban minor road from Xiwaihuan Road to Huanchengxilu, crossing north
to south. Trunk sewer will be laid under carriageway of west road, whose service range
covers within south to Zhongshanlu, north to Qiyunlu and west to Huanchengxilu, carrying
domestic sewage and industrial sewage and it connects general trunk sewer of Nanwaihaunlu.
Trunk sewer in Baiyunlu is 3703m long in total, collecting sewage area of 223.5ha. The
diameter of trunk sewer pipe varies from DN300 to DN400. The designed maximum flux is
70L/s, with a slope varying 0.002>0.003.
This trunk sewer will be constructed by excavation method due to its good soil quality
and low designed depth of 2-4.5m. The foundation of pipe adopts cushion with grouted
rubble and pipe base with concrete, and two measures can be taken if part section are affected
by ground water: firstly proceed foundation treatment, grouting with 30cm slice and 10cm
gravel; secondly support the groove with sparse or dense steel-plate pile according to sand
quality. Roadbed below 50cm deep should be backfilled with 2:8 lime soil due to the sewer
bury under the road surface.
(3) Trunk sewer in Yinfenglu
Yinfenglu is an urban minor road right near western bank of Fenghua River, crossing
north to south. Trunk sewer will be laid under road surface, whose service range covers
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAwithin south to Changchunlu, north to express highway and 400m west to Fenghua River,
carrying domestic sewage and industrial sewage and it connects general trunk sewer of
Nanwaihaunlu.
Trunk sewer in Yinfenglu is 2980m long in total, collecting sewage area of 135ha. The
diameter of trunk sewer pipe varies from DN300 to DN800. The designed maximum flux is
190L/s, with a slope varying 0.00 1-0.003.
This trunk sewer will be constructed by excavation method due to the good quality of the
construction site and low designed depth of 2-4.5m. The foundation of pipe adopts cushion
with grouted rubble and pipe base with concrete, and two measures can be taken if part
section are affected by ground water: firstly proceed foundation treatment, grouting with
30cm slice and 10cm gravel; secondly support the groove with sparse or dense steel-plate pile
according to sand quality. Roadbed below 50cm deep should be backfilled with 2:8 lime soil
due to the sewer buried under the road surface.
4) Trunk sewer in Jiangdongnan Road
Jiangdongnan Road is an urban minor road right near eastern bank of Fenghua River,
crossing north to south. Trunk sewer will be laid under road surface, whose service range
covers within south to Dahelu, north to express highway and 500m east to Fenghua River,
carrying domestic sewage and industrial sewage and it connects general trunk sewer of
Nanwaihaunlu, with finally transporting to Jiangdongnanqu WWTP.
Trunk sewer in Jiangdongnan Road is 5511m long in total, collecting sewage area of
about 3600ha. The diameter of trunk sewer pipe varies from DN500 to DN2200. The
designed maximum flux is 4301Lls, with a slope varying 0.0006-0.0016.
The section of trunk sewer with diameter varying from DN1100 to DN2200 will be
constructed by push-pipe construction method due to its deep designed depth of 3-7m, with
its much influence by ground water. The other sections of trunk sewer will be constructed by
excavation method due to the good quality of the soil in the section and low designed depth of
2-4m. The foundation of pipe adopts cushion with grouted rubble and pipe base with concrete,
and two measures can be taken if part section are affected by ground water: firstly proceed
foundation treatment, grouting with 30cm slice and 10cm gravel; secondly support the groove
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
with sparse or dense steel-plate pile according to sand quality. Roadbed below 50cm deep
should be backfilled with 2:8 soil-lime due to the pipes burying just under the road surface.
(5) General trunk sewer in Nanwaihuan Road
Jiangdongnan Road is an urban major road of south Ningbo city, crossing from east to
west. Trunk sewer will be laid under the green belt, whose service range covers within
Xiwaihuan Road, Baiyunlu, Yinfenglu, Jiangdongnan Road and Huanchengxilu (constructed),
carrying domestic sewage and industrial sewage and it connects general trunk sewer of
Jiangdongnan Road, with finally transporting to Jiangdongnan District sewage treatment
plant.
General trunk sewer in Nanwaihuan Road is 3164m long in total, catchment area of
2525ha. The diameter of trunk sewer pipe varies from DN1800 to DN2200. The designed
maximum flux is 3000L/s, with a slope varying 0.0006-0.0009. It will be constructed by
push-pipe construction method due to its deep designed depth of 7.5-8.5m, with its much
influence by ground water.
2.2.1.4 Renovation and Construction of Sewage Pumping Stations
The renovation for sewage pump stations in this design covers rebuilding of Ningzhong
combined pump station; Wudongzha sewage pump station and new construction of
Wangchun pump station and Qioubi pump station. At present, the existing pump stations
undertake pumping sewage and rainwater for Ningzhongpian subsystem, Wudongzhapian
subsystem and Huanchengnanlu subsystem.
(1) Ningzhong sewage pump station (capacity: Q=520L/s, H=6m)
Ningzhong sewage pump station is a conmbined sewage pump station . The service area
of it includes Jiefangbei Road, Jiefangnan Road ,Lingqiao Road, Changchun Road . It has six
24
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIApumps at present ,with designed capacity of 55001/s ,the influent pipeis DN 2000mm and the
absolute hight of pipe bottom is 1.Om. The sewage will be lifted by the pumps to dicharge into
Fenghua River .After the nonovation the main trunks in Jiefang Road , Lingqiao Road and
Changchun Road will be separation drainage system , part of the branches will still be
conbined pipes which will be connected with the trunk sewers .The disgined capacity after the
renovation will be 37000m3 /d. The engineering work: 13m X 7m X 15m(7m underground ,8m
above ground )pump house, 13 X 3m X 7m underground suction tank.
Vertical sewage pumps (Q=650m3/h,H=7m,N=22kW), 4 sets with 1 standby
Machine grids (B=2000mm,gap width 60mm) Iset , dregs 670kg/d.
(2)Wudongzha Pumping Station (capcity : Q=760L/s, H=7m)
The service area of Wudongzha sewage pumping station mainly covers along the
Xingninglu Road. There are 4 sewage pumps with design capacity of 5501/s; the diameter of
the inlet pipe is 1000mm. The absolute standard height of pipe bottom is - 0.80m.The
effluent is discharged into Fenhua River by lift pumps ;the design capacity after renovation of
the pumping station will be 3.3 m3/d. The engineering quantity: 13m X 7m X
15m(underground 7m, ground 8m) one pump house , 13m X 3m X 7m underground suction
tank .
Vertical sewage pumps (Q=950m3/h,H=7m,N=3OkW), 4 sets with 1 standby
Machine grids (B=2000mm,gap width 60mm) 1 , dregs lOlOkg/d
(3) Wangzhun Pumping Station (capacity: Q=1290L/s, H=8m)
The service range of the pump station covers Yinfenglu and Xiwaihuan Road and
sewage of Cicheng Town will cross the river through the lift pump station. There are 3 pumps
now and the design capacity is 930L/s.The pumping water will be discharged into the
Fenghua River .The design capacity after renovation will be 37000 m3 /d,.engineering work
13m X 7m X 15m(underground 7m, aboveground 8m) pump house ;13m X 3m X 7m
underground suction tank .
Vertical pumps (Q=950m3 /h,H=8m,N=37kW), 6 sets with 1 standby.Three sets will be
fixed recently with one standby. .machine grids (B=2000mm,gap width 60mm) 1 set, dregs
1860kg/d. .
(4) Qiubi pumping station (Capacity : Q=480L/s, H=7m)
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
It is a sewage pumping station equipping with grids room, suck tank and pump house
which is half underground structure :diameter 13.5,with 7.Ounder ground and 4.5 above the
ground .The specifications of the main equipment:
vertical sewage pumps (Q=600m3/h,H=7m,N=22kW), 4 set with one standby .Two will
be installed recently with one standby .
Machine grids (B = 2000mm,gap width 60mm) 1 set , dregs ,590kg/d.
2.2.2 WWTP Engineering
2.2.2.1 Engineering Planning
Based on the Urban Master Planning Compendium of Ningbo City ,a WWTP with a total
capacity of 400000 m3/d will be built in the center district of Yinzhou, south of
Hanzhou-Ningbo expressway and east side of Fenghua River It covers a land area of 20.96 ha.
The capacity of P'hase I is 160000m3/d covering 11.32 ha. There are 6 subsystems for the
service sewer networks: Ningzhongpian subsystem (catchment area 4.6 km2 serving
population, 53000); subsystem of Wutongzhapian (catchment area 5.6km2 , serving
population 56000); subsystem of Huanzhengxilu (catchment area, 18.5km2) subsystem of
Huanchengnanlu (catchment area 6.7km 2 serving population 67000); subsystem of
Yinzhou District (catchment area, 30km); the rest is the subsystems of Cicheng and Dongqian
Lake.
2.2.2.2 General plane Layout
The general plane layout will observe the following principles: smooth technological
process. compact arrangement, short sewer, land saving, full greening and beautifying
environment.
According to the process, sewage, introduced from east of the plant area, flows into the
grid for removing grit, then pumped to thin grid and cyclone grit removal tank for removing
the grit and flows into the aeration tank. After that, it flows to the secondary sedimentation
tank, where the settled sludge flows to the return sludge pump house via the outer layer of the
26
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAdistribution well, then pumped back to the aeration tank. The remaining sludge flows to the
sludge storage tank and dewatering house for dewatering, the sludge cake thus produced is
trucked to the disposal site. The sterilized water in the secondary sedimentation tank flows
westward to Fenghua River.
The blower house is located between the two aeration tanks so as to shorten air pipeline
and reduce air pressure loss. Its location is given consideration to Phase II project.
The return sludge pump house is arranged between the aeration tank and the secondary
sedimentation tank so as to make the return sludge flow short distance. The sludge-dewatering
house is located at side of transport road, thus is easier to transport the sludge out of the plant.
Storage yard is located beside the grid chamber, cyclone grit removing tank and
dewatering house for easy stockpiling, truck loading and transport of waste, grit and sludge.
The substation is arranged near the load center with easy incoming of cable considered.
The repair shop, warehouse, shed and sludge transport equipment depot is arranged
alternatively in the east of the plant area so as to make full use of the site within the enclosing
wall. The repair shop covers machinery repair and electrical equipment repair, etc.
The administrative area of the plant includes complex building, garage, and bicycle shed
and janitor' s room. The complex building covers office, chemical analysis lab, bachelor
quarters dining room, bathroom, central control room and instrument repair, and four stories
in all. The square and parking lot are provided in front of the complex building and a small
garden is located in the south of the complex building.
It is fully greened in the plant area to beautify the environment.
Space for its expansion is reserved in the south of the plant area.
The.general plane layout is shown in the drawings attached.
2.2.2.3 Process Design
See Table 2-3 for details of the construction structures.
Electricity Design
1. Power supply for the Plant
The power load for the sewage treatment plant is Class II. In the design, two circuits of
lOkV power supply are adopted (one working and the other for standby).
2. Power load calculation
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
The demand coefficient method is used to calculate the power loads. The calculated
effective power load of the whole sewage treatment plant Pjs=1754kW, the calculated
ineffective power load Qjs=57OkVar (after compensation) and the Calculated apparent power
load Sjs=1844kW. The power factor COSO=0.95 or above among which the calculated power
loads at the general transformer station (MCC2) are as follows:
Effective power: Pjs=1308kW
Ineffective power: Qjs=420kVar(after compensation)
Apparent power: Sj s= 1373kVA
The calculated load of the transformer substation (MCC2)
Effective power: Pjs=445kW
Ineffective power: Qjs=l4OkVar(after compensation)
Apparent power: Sjs=467kVA
3. Wiring for the plant
Single sectional bus line wiring is used in lOkV power. Two circuits of lOkV power are
adopted (one for working; the other for standby). Switch on the sectional bus line and the
power supply begins to operate. Single sectional bus line wiring is also used in 0.4kV power
with the transformers connected to the two corresponding sectional bus lines in lOkV power.
The transformers run separately, each as the standby for the other. The power supply and the
illumination supply share the transformers whose neutral point is directly grounding
4. Equipment selection and substation
The middle located hand-vehicle switch cabinet is used in IOkV. The type is KZN1-12
metal-armor enclosed switch cabinet. The VT2-12 vacuum circuit breaker is selected with the
rated current being 630A and the rated turnoff current 31.5kA.
MNS type low voltage drawer switch cabinet is used in 0.4kV. Capacitance automatic
compensation cabinet is adopted for the low voltage capacitor and paralleled with the low
voltage switch cabinet. The transformer is SC9 type dried energy-saving transformer. Large
28
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIApower consumers in the sewage treatment plant are the inlet water pump house and the air
blower house, so to reduce the low-voltage line loss and the low-voltage bus line voltage
fluctuation induced by large power electromotor start-up, the 10kV power should be deep in
the load center. Therefore in the machinery maintenance room near the inlet water pump
house a transformer station is built where 2xSC9, 400kVA, 10/0.4kV transformers and
low-voltage motor control center MCC1 are assembled. In the neighborhood of the air blower
house a general transformer station is built where a 10kV high-voltage cabinet, 2xSC9,
IOOOkVA, 10/0.4kV transformers and low-voltage motor control center MCC2 are installed.
Although the sludge returning houses and the sludge-dewatering house consume not too much
power, yet there are a number of motors. To achieve functional control, motor control centers
MCC3, MCC4 and MCC5 with the power supplied from the general transformer station, are
therefore built near the two sludge returning houses and the sludge dewatering house.
Due to the construction of the project by stages and the larger scale in stage II,
equipment in the transformer stations are only used for stage I. During stage II, another
general transformer station will be built from which power uses in stage I will switch to be
supplied.
5 Electric Energy Measurements
High demand and high measurement is used in this project. Two measuring cabinets are
on the two 10kV bus lines with a 0.2 rating CT and PT set for measurement. In the relay
closet of the cabinet, an effective power ammeter and an ineffective power ammeter are
installed .
6. Operating Power Sources
Spring energy storage direct current operation is used in 10kV switch cabinet and the
working power is 220V DC that comes from the direct current screen.
7. Reactive-current compensation
Capacitance automatic compensation cabinets are set up on the low voltage operating
voltage bus line at all of the transformer stations. The power factor after compensation is
COS0=0.95 or higher.
8. Secondary Wiring and Relay Protection
10kV switch cabinets, 10kV sectional circuit breakers and 10/0.4kV transformers are
controlled by the onsite switch cabinets. And light monitors the secondary circuit.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
9. Relay protection devices:
Delayed fast breaking protection and over-current protection is adopted in 10kV circuit.
Fast breaking current, over-current and single phase grounding protection on the low voltage
side are employed in 10/0.4kV transformers. All relay protections are monitored and
controlled by computers.
10. Over-voltage Protections and Grounding
To protect the 10kV equipment from the attack of over-voltage traveling wave in the
atmosphere of trolly wire, zinc oxide lightning arresters are installed on the inlet wires of the
transformers and on the 10kV bus lines.
Ring shaped grounding is used at 10/0.4kV transformer stations. The grounding
resistance is R< 4ohm and forms a developed network throughout the plant.
11. Electromotor Starting Methods
Electromotor of the inlet water pumps (110kW) and that of the air blower pumps
(315kW) are started indirectly, while the others are all started directly.
12. Electromotor Control Methods
Key technical devices driving electromotor uses onsite control, MCC control and PLC
control, i.e., triple control. The onsite control box is set beside the motors. The on/off buttons,
running, stopping and failure indicators, and jerk buttons are all just on the control box panel.
There are onsite MCC-PLC control switches, on/off buttons, indicators and amperemeters on
the MCC.
13. Illumination and overhaul Network
280/220V triple-phase four-wire system is used in illumination and repair. The inside
illumination source uses golden halogen lights and fluorescent lights. The roadway
illumination in plant area uses photoelectric ally controlled high-pressure sodium lamps as
light sources. In the especially humid area illumination source uses 36V or 12V.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
14. Cable Wiring
Cable trenches and trays are used for cable wiring within the building while cable
trenches, burying and trays are used in the plant area. The buried cables are metal armored;
meanwhile those in the cable trenches and trays are not armored. The electric cable types are
VV22-1 and VV-1 whereas the control cable type is KVV22KVV.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Table 2-3 The Main Structures and Equipment of the WWTP
Name of Am Designstructure oun water Main Equipment Design parameters
struture t flow
Water trap Plane size5m X 3mWater inlet 2 Unit width 1.8m
ditchCoarse grid 2 tightwire type grit removers, 1 screw Grit remover clearance 20mm, a=70° , length
chamber conveyer of convyer5m, capacity 2m3/h
Inlet pump 1 208000m 3 6 submerged pumps (4 working 2 Q=0.603m3 /s, H=13m, N=llOkW, ri =82%,house /d standby) 985rpm
Effective width of barl800mm, gap width
Fine grid 3 Cuneiform screw grid machines 6mm, obliquity 350, water depth 1.02 m.with axis-free screw conveyer axis-free screw conveyer length 8m, capacity
2m1/h.
Cyclone 2 104000n ce sprtrM30m,L7sedimentati 2 /d 2 Scre separator ¢ 300mm, L=7m Dia 5.8m H 5.44m
on tank
aeration 2 104000m3 spec: 79m X 75.5m X 6m, anaerobic retaining
tank /d time 1.7h, aerobic retaining time 6.7h
Secondary 2 m3/ A 2 Waterpower retaining time 3.7h, tank Dia 45msedimentati 4 Waterpower load value 1.26m3/m2 *h wt ldermvrwt eta rv
on tank with sludge remover with central driveChlorinatio Chlorination is adopted, volume adding 4.5t
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
n roomSludge 4 Returning pumps 2 screw sludge
pump house pumps (loperaton 1 standby)Blower 4 single-stage high speed centrifugal Air volume Q=12000m 3/h, press 0.73bar,house blower (3 working 1 standby) N=315kW.
1 sludge storage tank with effectiveSludge volume V=115.6m 3 , 2 centrifugal
dewatering dewatering machines , unit capacityhouse 80 m 3/h, 1 flocculants adding device
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
2.2.2.4 Automatic Control Design
1) Design requirements of the project
To ensure the safety, reliability and constant production of the sewage treatment process
in the plant and improve the automatic control level, Adopted control system along with the
monitoring and data collecting system (SCADA) is the fruitful programmable logic
controller-based (PLC) collecting-scattering type control system that has been widely used in
both domestic and foreign sewage treatment plants. The characteristic of the
collecting-scattering type control system is the separation of the management from the control.
The managing part is mainly to monitor the production process of the whole plant while the
control part is to achieve the automatic control over the specific precincts through the on site
PLC. The SCADA system, through the on site checking devices and network devices to
monitor the main technical process and collect related data of the technical parameters during
the production (for the computer controlled system, see the attached figure).
All of the checking and measure devices are online. The transmitters all have digital
display devices installed and are programmable. The PLC transfers standard analog and
digital signals.
Considering some administration departments of the sewage treatment may visit the
system, communication interfaces with upward communication capacity is reserved. And
Space is also reserved for possible expansion of the production system.
(2) Composition and function of the control system
The control system of the sewage treatment in the plane is composed of
Class I-on site control (on site electric control gear)
Class II-process control (specific PLC control substation)
Class III-monitor management (operation station and engineer station of the central
control room)
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Central control room
a. Introduction
A central control room is built in the complex building located in the front of the plant. It
is in charge of the monitoring the variations of the technical parameters during sewage
treatment, status of the working devices and operation management.
Three computers are equipped in the central control room, one of which is for the
engineers' use (engineers' station). Through it, the whole system can be developed,
parameters and states changed. The other two computers are for the operators (operation
station). Via multiple interfaces, they monitor the real-time variation of the technical
parameters, operation and breakdown of the devices and print the everyday reports, accidents
and data records. The monitor systems of the two operators are redundant for each other.
There are many menus in the computer monitor at the operation station, including
schedules of the constructions, menu of the all kinds of technical parameters, trend lines of the
technical parameters, menu of failures and the devices operation conditions etc. Through
these, the operators can fully learn the each part of the treatment process and the occurrences
at each stage in time.
Three printers can print all the needed materials at any time and the daily reports, week
reports and monthly reports.
To convenience administrators learn the operating status of the devices in the whole
plant, a mimic panel is installed in the central control room that displays the operating status,
failure status and variation parameters of the devices at pump stations both throughout the
plant and outside. The panel is controlled by a specific PLC.
Due to the large size of the plant, to make the everyday management, monitoring and
technical analysis flexible, multi-medium which include large-screened projectors and audio
devices will be installed in the central control room. They can project the menus of CRT at
the operation station to the screens, which in combination with the flow chart of the mimic
panel, reflects the real time data and detailed pictures at each stage of the technical process.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Besides they also have the functions of sound prompt, alarming and help, which in
conjunction with the projectors can synchronize the sounds and pictures.
The mimic panel displays the full-scale status of technical process statically while the
projector displays the pictures of all the technical parameter dynamically.
b. Contents of the mimic panel:
Indication of the process parameters such as water level in the water-collecting basin of
the pump house, flux of the pipes and sums, solved oxygen volume in the aeration tank.
concentration and the effective power etc.
Status of the devices and alarming indication including the running and failures of the
monitoring devices;
Detailed layout of the technical process of the sewage treatment system in and outside
the plant.
Date and time display.
2) Process control station
a. The first partial control station (PLC1)
It is located in the general transformer station, responsible for the collection, display and
control of the facilities' process parameters and devices status at the transformer stations,
incoming water pump house, sedimentation tanks, Parshall flumes, A/O aeration tanks,
blower house, sludge return house, secondary sedimentation tanks, and dephosphorizing and
drug-adding house. The control process includes control system of the grids in the incoming
water pump house, that of the sludge pump (including the frequency controlled), grit removal
devices systems of sedimentation tanks, the regulating system of the aeration volume at the
aerobic tank, the returned sludge ratio regulating system of sludge backwash pump, sludge
pump control system, and the control and air volume regulating system of the blower pump.
The signals to be checked include water level, sewage and sludge flux, concentration of the
sewage and sludge, solved oxygen, PH value, and electrical potential of oxidation-reduction,
blowing pressure, temperature and the status of the devices.
To use on site bus line to check instruments.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Independent computer management system is installed at the transformer stations.
b. The second partial control station (PLC2)
It is located in the sludge dewatering pump house with control object being the control
system of the dewatering machines. The signals to be checked are liquid level, flux, and
harmful gas and devices status.
3. Items for Measuring and control
Measurement of PH value of incoming and outgoing water
Temperature for incoming water;
Level indication in front and behind thick/thin grid and control for start and stop
(supplied by grid machine producer);
Water level indication for water incoming well and sludge well;
Level indication for sludge returning;
Sewage flow;
Blowing air flux measurement (two main air pipes and all branch pipes of the anaerobic
tank and aerobic tank);
Air pressure measurement at the main pipes
Air temperature measurement at the main pipes
Measurement of incoming water and concentration of solid/suspension in water from
secondary settling tank;
COD online measurement for incoming water and water from secondary settling tank;
TP online measurement for incoming water and water from secondary settling tank;
Measurement electric potential of oxidation-reduction in anaerobic tank;
Soluble oxygen measurement in water from aerobic section and automatic blowing air
volume control;
Measurement of sludge concentration in anaerobic section and automatic control for
sludge returning volume.
Measurement of electric parameters at the high voltage side and those at the MCC
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
incoming wires gear of the low voltage system.
For the details of the above items, see process checking and control flow chart.
4. Main Instrument Selection
Level indication: ultrasonic liquid level indicator;
Sewage flow: flow meter for open channel;
Sludge returning flow: flow meter for open channel;
Blowing air volume: Annular flow meter
Acidity : Industrial acidity gage;
Soluble oxygen in water : membrane type soluble oxygen indicator
Organic concentration: COD online indicator
P concentration: TP online indicator;
Sludge concentration (MLSS ) : Solid suspended substance concentration indicator
Sewage concentration (SS) : Solid suspended substance concentration indicator
Pressure : Intelligent pressure transmitter.
Temperature: body type temperature transmitter.
5 System power supply and cable lying
The power supply in the central control room is achieved by the general transformer
station' s supplying for the UPS and the UPS supplying for the FCS system. Power sources
at PLC substation is supplied by its corresponding distributing box, which is also supplied by
the UPS. The signal cables of the automatic control instruments in the plant area and the
communication cables between the main-sub stations are mainly laid by cable trenches or
buried directly. When they have to share the cable trenches with the electric wires, layered
lying is required. Those crossing roads or above the ground and those entering households
should be coated with apparent protective tubes.
2.2.2.5 Architectural and Structure Design
38
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA1. Architectural design
The civil works in the design are the constructions of Jiangdongnan sewage treatment
plant, Ningbo. A new complex building and a blower house (for details, see the table of
buildings and constructions) will be newly built.
Total building area: 8602m2
Total building volume: 39888m3
This plant will be built with a lot of individual civil works each with small volume, so
the attached buildings with similar nature and closely-linked function will be merged as far as
possible so as to reduce site area, enlarge greening area and facilitate management.
The complex building covers office, production management office, chemical analysis
lab, living quarters, dining room, dining hall, and central control room, which is easy for
management and constitutes a certain mass of building. Water for bathing and drinking will
be electrically heated, so no separate boiler house will be built.
As a municipal project, the buildings shall be designed in a simple and clear style.
2 Structure Design
(1) Engineering geology
According to data supplied by No. 2002-161 geotechnial site survey in June 2002, the
area to be built belongs to the marine plain. The topography of the site is very simple and the
ground is smooth. Elevation at the ground surface is 2.35-1.72m. The survey reveals that
foundation soil of the site within 40m below the surface belongs to the silty clayey soil,
clayey soil and silt at the Holocene epoch of the Quaternary Period. The building site can be
classified as Class IV.
The stable underground water level is 0.28-0.5m from the surface and the absolute
elevation is 1.84-1.7m, which belongs to the perched water. The underground water is
non-corrosive to the concrete and free of seismic foundation liquefaction.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
(2) Earthquake-proof design
The basic seismic intensity in Ningbo area is in a magnitude of 6 according to documents
issued by relevant bureau and commission of the state and zoning map of seismic intensity in
China.
(3) Basis for structure design
Besides satisfying the strength and stiffness requirements of each construction, attention
should be paid to stability of structural anti-buoyancy resulting from the underground water
and corresponding measures should be taken. For the water storage constructions, control of
structure crack width, anti-seepage and antisepsis should be carefully handled.
(4) Construction style of main buildings (structures)
The structural style of various buildings is determined according to the technological
process. In the light of construction scale and importance of the buildings, different structural
styles, such as reinforced concrete frame, reinforced concrete bent fiame and brick-concrete
construction, etc. will be adopted. For foundations, it is planned to adopt pile foundation, raft
foundation, independent foundation and strip foundation. Ordinary cast-in-site reinforced
concrete (RC) will be used for water storage structures.
Consumption of Three Building Materials
Steel: 942t
Cement: 8479t
Wood: 1035m3
2.2.2.6 Roads and Transportation
The roads within the plant form a developed road network to satisfy the requirements of
fire protection and traffics. Due to the shorter side of the stage I site adjacent to the road in the
east, a passageway is arranged in the design. Another cargo passageway will be built during
40
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAthe expansion and the personnel and cargo passageways are arranged separately. Staff
members and workers enter the complex building for registering their attendance via
personnel passageway, then go through the complex building and get into the plant area.
The road in the plant is 6m wide and paved with 22cm-thick graded broken stone as base
course and 15cm-thick cement concrete as surface. Granulated cinder can be paved
underneath the base course, if necessary. The sidewalk is 2m wide and paved with 10cm-thick
graded broken stone as base course and 10cm-thick cement concrete as surface.
The turning radius at curb of road crossing is 9m.
The main substances for transportation includes grit, settled sludge and dewatered sludge
as well as a small amount of goods, 120t/d in total and 25km in transport distance. According
to the calculation, eight 4.5t self-dumping trucks are needed. All grit and sludge must be
transported out on the same day they are produced so as to avoid too much storage within the
plant. Twol.St forklift trucks will be used as loaders. The sludge transporting equipment
storage is provided inside the plant area.
In addition, a passenger bus will be selected for transporting staff members and workers
at commuter time. One light-duty bus and one car will be provided for dealing with office
affairs. Two 1.5t double-row seat pickups are provided for sewer maintenance and repair and
one St heavy-duty truck is provided for transporting fragmentary goods. A garage is provided
in the administrative area.
2.2.2.7 Greening of the Plant Area
A small garden will be built in the west of the front plant area, where a pavilion will be
constructed and even green trees will be planted. The small garden and the front plant area are
located beside the urban road, thus beautifying the streets.
The plant area shall be fully greened. Tall alee trees and dense bushes will be
alternatively planted along the enclosing wall, thus forming an enclosed green curtain so as to
reduce adverse effect on the facilities around. A garden type plant will be built by utilizing
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
abundant irrigation water source of the plant so as to beautify the environment and purify the
air.
Main Tech-economic Indexes
Total site area: 20.96ha
Site area used during stage I: 11.32ha
Site area occupied by the buildings and structures for stage I: 2.38ha
Floor area during stages 1: 8977 m2
Building coverage of stages I: 21.02%
Plot ratio of stages I: 0.079
Greening area of stages I: 3.96ha
Percentage of green land of stages I: 34.90%
For details see the layout of the plant
2.3 Sewage treatment process
The objects treated in the WWTP include domestic and industrial wastewater, which
belong to organic wastewater.
A/O process with dephosphorization by biological method is recommended and
biological nitrification process is used to remove NH3 -N and N, and assistant chemical
method is used for dephosphorization at the sludge dewatering liquid or the secondary
sedimentation tank so as to prevent P from entering the sewage treatment system again.
In combination with the efficiency-improving chemical methods for dephosphorization,
biological treatments of aerobic organic degradation (0), aerobic nitrified denitrogenation (0),
anaerobic dilution (A), and aerobic absorption dephosphorization (0) shall be adopted for
sewage treatment and disposal process.
In the sludge treatment process, dewatering machines are used to decrease the water
content to 75% or below for transportation and burial.
A/0 process
The recommended project in this item is A/0 process removed phosphorous by
using biological method. And removes ammonia nitrogen by biological nitration.
42
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Its supernatant liquid adopts chemical phosphorous removal measure to prevent
the effusive phosphorous into the sewage disposal system.
The technical process: the water from the first treatment and return sludge
flow into the anaerobic tank firstly to release phosphorus, then go to aeration
tank to biological nitration. On the base of obtaining the effect of ammonia
removal, meanwhile the organic material and phosphorus can be removed. The
disposal sewage is discharged after the secondary sedimentation tank.
In this project, the removal rate of total phosphorus (TP) can reach mostly
80%, and the effect is concerned with these factors as following: the
concentration of TP inflow, the concentration of organic materials, MLSS, IIRT
of the anaerobic tank and aerobic tank, OPD of the anaerobic tank, the DO
concentration of aerobic tank, the sludge reflux ratio, and so on. The water
outlet of BOD and SS is the same as the general activated sludge process. If
the loading of the BOD-SS is the proper range, the water quality is even better.
Because the quantity of the phosphorus in the SS of the water outlet is rather
large, the concentration of the SS of the water outlet should be reduced to ensure
the TP of the water outlet to reach standard.
The technique process is shown in Figure 2-1.
Technical measures
1) Due to the variation of P content in the influent water, separate inlets
shall be designed at the aerobic section and the anaerobic section of the aeration
tank. When the influent water has a high P content, it will flow into the
aeration tank directly through the aerobic section without bypassing the
anaerobic part.
2) According to the advanced experiences abroad, to improve the effect of
dephosphorization, the anaerobic state in the anaerobic tank should be ensured
and the amount of returned sludge to the anaerobic tank should be strictly
controlled.
For above target, adjustable valve should be set in the returning ditch for sludge
to control. the returned sludge volume to anaerobic tank ranging from 100% to
20%, and the returned sludge remains wil.l go directly into the aerobic section
of the aeration tanks.
43
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
3) Drug-out pipes of the chemical dephosphorization and Chlorination shop
are connected to the respective seepage pipes of the secondary sedimentation
tanks and the dewatering house so as to add the appropriate drugs, decrease the
phosphor content of outgoing water in the secondary sedimentation tanks and
prevent the seepage from releasing phosphor and resulting in secondary pollution.
4) To improve settling effects of the secondary tanks, advanced technologies
are to be imported to build all-round-in all-round-out secondary sedimentation,
so as to improve the settling efficiency, reduce the diameter of the
sedimentation tanks, the amount of works, costs and land acquisition.
44
Contact tank * Chlorization shop
_)
Sec. Sedimentation tank |
Sludge pump well
Aerobic tank _
I * ~~~~~~~~~~~IF
aGrit chambern Sludge storage shed
C) C) D
rg O | I0nlet pump house 1
C)~~~~F
i | ~~~~~~~Thick grid |I.
C)~~~~
C) t
o""I
.E~~~~
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Fig. 2-1 Sch4eme 1: Flow sheet of A /0 Process for P Removal
46
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
2.4 Sewage Volume and Construction Capacity
2.4.1 Current Sewage Discharge
According to "Feasibility Study Report of Jinagdongnanqu WWTP and Sewerage" the fixed number of service years of the project is up to 2010 year and theservice area include Ningzhong area, Huancheng Road, Central area of Ying county,town of Cicheng and town of Dongqian Lake. According to the analysis onthe records of the three pump stations under Jiangdongnan District, the presentsewage volume for this system is 48600m3/d (Yin County central area not included,and that of Cicheng town and Dongqian Lake town are shown in their respectivereports). For details see Table 2-4
Table 2-4 Sewage Volumes as per the Record of Pump Station
Pump station Feature Qty Daily running Sewage volume
Ningzhong Interflow 4 big pumps Only one small 12000 m3/d
2 small pumps pump runs for
fine days
Wudongzha Sewage 4 pumps 13200 m3/d
Huannan Sewage I big pump 7h running 23400 m3/d
2 small pumps
Total 48600 m3/d
According to the statistics for the flow of the main sewers in the systemby Ningbo Planning Institute and Municipal Administration department, thepresent sewage volume for this system is 42400 m3/d (Yin County central. area,
Cicheng town and Dongqianhu town not included). For details see Table 2-5
Table 2-5 Sewage Volumes as per the Records of Sewer
Sewer section Service range (ha) Population Sewer size Flow (m 3/d)
(mm) __ _ _
Changchunlu 91.14 21100 300-1600 5500
Jiefanglu 96.98 21000 300-900 5900
Lingqiaolu 11.30 2600 300-400 700
Huanchengxilu 206.13 47000 300-900 12500
Jiangdongnan 295.25 68700 300-1000 17800
Road
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Total I I l 42400
2.4.2 Forecast on Designed Sewage Volume
(1) Forcast of sewage volume of Ningbo service area
According to "Feasibility Study Report for Ningbo Jiangdongnan WWTP and
sewerage ,the service area include Haishu area and Jiangdongnan area. All the
service area is 35. 4km2(Yin County central area, Cicheng town area and Dongqianhu
town are not included). The sewage discharge for service area is pridicted on
the base of the current and the forcast of sewage volume in those service area.
The result is shown in table 2-6.
Table 2-6 Predicted sewage discharge volume
with the Three-river service area________________________ 2005 2010 2015 2020
living industry living industr living industry livin industr
1 Water consumption (104m 3/d) 8.96 1.09 10.89 1.17 12.78 1.72 14.09 2.41
2 Sewage discharge rate 0.85 0.8 0.85 0.8 0.85 0.75 0.85 0.75
3 Sewage collection rate 0.7 0.7 0.8 0.8 0.8 0.8 0.85 0.85
4 Seepage factor 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1
5 Sewage (104m 3/d) 5.9 0.7 8.1 0.8 9.6 1.1 11.2 1.7Total (-1O4m3/d) 6.54 8.97 10.70 12.89
(2)Forcast of sewage volume of Yinzhou area
According to the master plan of Yin County central area, the sewage dischage
for Yin County central area is pridicted by several different ways.The result
is shown in table 2-7.
Table 2-7 Predicted sewage discharge volume
with the Yin County central arear ___________-____ 2005 2010 2015 2020
an Water ter Land Water Wate Land Water Water Land Water Water
_____ ___________________ use supply use use supply use use supply use use supply use
Coverd area 10 15 19 21
48
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
(kMI2 )
Sewage flueratio scale 0.55 0.55 0.55 0.6
(UIs.ha) _ _2 Water supply 9 11.5 14 16
_(104m/d)Sale to supply ratio | 0.82 0.82 0.82 0.82
Sewage disch 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85______ arge rate
Sewage colle 0.7 0.7 0.7 0.7 0.7 0.7 0.8 0.8ction rate
I Seepage factor 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1Water useing
3 standards (include 400 420 440 460industrial water)
Population (10 4 )\ 14 21 26 31Sewage volume
4 e vo104 ml3/d) 4.75 4.8 3.7 7.13 6.2 5.8 9.03 7.5 7.5 10.8 9.8 10.7
Average sewage volume 4.42 6.36 8.01 10.46
_____ (10 4 m3 /d) I I I_I
(3)Forcast of sewage volume of Cicheng town and Dongqianhu area
The detail description of forcast of sewage volume of Cicheng town and
Dongqianhu area can be find in "Fisibility Study Report of Jiangbei area Cicheng
town environment protection engineering" and "Fisibility Study Report of
Ningbo Dongqianhu area environment protection engineering" .The pridicted
sewage volume result is shown in table 2-6.
Table 2-8 Predicted sewage discharge volume unit: 104m3/d
area 2005 2010 2015 2020
Gucheng area 0.25 0.40 0.43 0.48New area 0.24 0.66 1.05 1.57
Dongqianhu area 1.09 1.95 3.92 6.74total 1.49 3.01 5.4 8.79
4. Forcast of WWTP sewage volume of Jiangdongnanqu
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
The statistics on WWTP sewage volume of Jiangdongnanqu has been get from above
tables 2-6, 2-7, 2-8. The result is shown in table 2-9.
Q 2-9 Statistics on WWTP sewage volume of Jiangdongnanqu
year 2005 2010 2015 2020
Sangjiangpian 6.33 8.08 10.27 12.35
Yin County central area 4.42 5.44 8.01 10.46
Cicheng town 0.40 1.06 1.48 2.05
Dongqianhu 1.09 1.95 3.92 6.74
total (104 m 3 /d) 12.23 16.53 23.68 31.60
2.4.3 Designed scale
Because the building periods of WWTP of Jiangdongnanqu is between 2005 and 2010
combined with the statistics forcast results of table 2-9,,this treatment plant capacity will be
160000 m 3/d.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
2.5 Sewage Disposal Grade
2.5.1 Sewage quality
According to the "The drainage standard in outdoor design (GBJ14-87)" , the
average pollution load per capita is BOD5 20-35 g/d, and the concentration of
sewage is related to water consumption amount. When the amount of water
consumption per capita varies between 150-350 L/d, the BOD5 is 160-70 mg/L. For
domestic sewage, the quality of sewage is closely related to the living standard.
The general trend is that the sewage amount as well as polluting load will
increase but the concentration of pollutants in the sewage will decrease as the
increase of the living stand. However, when the society has developed to certain
level, the reuse of domestic sewage will be increased, so will the recycling
of domestic rubbish. Therefore the average sewage discharge and the polluting
load per capita will decrease. Because the domestic sewage is mixed with
different kinds of industrial wastewater, its quality can only be analytically
determined.
Twice large-scale activities of sewage monitoring were conducted in Ningbo
City. On March 10-13, 1993, sewage samples were collected from the Yinjiang-an
Pumping Station, west Jiangxia Bridge Pumping Station, west Lingqiao Pumping
Station and the 4 main flowing automatically drainage exits. On March 3,5, 1997,
Sewage samples were collected from Yinjiang Pumping Station, the pump station
at Ningbo High School, the exit at the east side of Zhongshan Road, Xiaowen
Pumping Station and the pump station at the north Zhongxin Road. The analytical
results of these samples are listed in the accessory tables.
These monitoring results are evaluated by taking "The integrated discharge
standard of the second class" as reference.
Results of 1993:
The pH value of the domestic sewage of Ningbo urban district was 7. 12-8. 09
with an average of 7.23. Generally, it conforms to the standards. But sewage
acidity was too strong in certain time and for a few pumping stations, its pH
value was as low as pH 2.23.
The value of SS was 1. 5-204 mg/L with an average of 226mg/L, and it was 50%
higher than the requests of the standard.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
The value of CODcr was 56. 5-382 mg/L with an average of 211mg/L, 40% higher
than the requests of the standard.
The value of BOD was 24-163 mg/L with an average of 81mg/L, 1. 7 times higher
than the requests of the standard.
The value of NH3-N was 7. 1-84. 1 mg/L with an average of 36. 0 mg/L, but higher
in the residence areas (Yinjiang Pumping Station and Kongpu Pumping Station).
The average in these areas is 44% higher than the requests of the standard.
The value of total phosphorous was 0. 4-6. lmg/L with an average of 2. 9 mg/L,
1.9 times higher than the requests of the standard
The values of petroleum-like materials contents were all conformed to the
standard except those at Huaishu Road Pump Station.
Copper (Cu) content ranged from <0. 01 to 0. 19 mg/L with an average of 0. 015
mg/L, it was far below the request of the standard.
The concentration of Zn was usually <0. 05-0. 57, much lower than the request
of the standard except a highest value of 10. 95 mg/L found at Huaishu Road Pump
Station, which was 1.1 times higher than the standard due to the acceptation
of industrial wastewater.
The total value of Cr was 0. 004-0. 21mg/L with an average of 0. 013mg/L,
conformed to the standard.
The CODcr and BOD, of sewage in Ningbo City was relatively low, mainly due
to the mixed collection of rainwater and sewage in some pump stations together
with its abundant precipitation.
The results of 1997:
The value of pH varied between 7. 01-8. 26, it was conformed to the standard.
The value of SS was 66. 7-262. 7mg/L with an average of 125 mg/L, 50% lower
than the standard.
The value of CODcr was 24. 0-309mg/L with an average of 106 mg/L, 40% lower
than the standard.
The total phosphorous content was 0. 48-5. 1 mg/L with an average of 1. 64 mg/L,
64% higher than the standard.
The values of petroleum-like materials contents were much lower that the
standard.
The monitoring results of 1993 and 1997 shows that the quality of sewage
in Ningbo City varies a lot, the pollutant contents in sewage at the pumping
station in main resident district are comparably higher. Because of the mixed
collection of rainwater and sewage by the sewer system in most districts of Ningbo
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
City, the pollutant concentrations in sewage are relatively low.
According the sewage quality investigation of the sewage disposal plant in
Northern Jiangdong District of Ningbo City, the parameter of the sewage quality
is COD, llOmg/L, BODs 84mg/L, TN 15mg/L, and SS 160mg/L. See table 2-14 for
details.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Table 2-1 1 Sewage Monitoring Results of the PuLIlpilng Stations in Ningbo (1993.3.10-1993.3.13 Unit mg/L expect pH coliform group/L)
Yijiang Xiaowe Ningzh Kongp Huansh Wudong Weste Yong
Samp g points an n ong u. u Dahelu zha Western rn Easter RiverIte pumpi pumpi pumpin ptlmpi pumpin punpin pumpin Jiangxia Ling n Ling Bridg Collect
ng ng g ng g station g station g station Bridge Bridg Bridge estation station station station g e
Water Rang 11-13 10-10 12-12 10-10 12-12 11-12 12-12 10-11 10-10 10-11 10-11 10-12temperatur Aver
tempet Aver 12 10 12 10 12 12 12 10.5 10 11 11 11_____ ____ ageI
Rang 7.31-7. 7.12-7. 7.34-7.4 7.30-7. 2.23-7.1 7.21-7.3 7.18-7.4 7.16-7.9 7.43-7. 7.68-8. 7.43-7. 2.23-8.0PH e 77 63 4 55 8 3 8 7 55 09 76 9
Aver 7.48 7.28 7.39 7.43 4.85 7.26 7.29 7.57 7.49 7.89 7.60 7.23age
Rang 58-128 53-91 19-78.5 108-49 60-216 1.5-50.5 41.5-161 127.5-27 18.5-1 225-20 166-49 1.5-204J
SS Aver 3 .5 1.5 57 44 6aver 86 73 50 264 151 23 88.5 200 88 1135 331 226
_____ _ __ age _ _ _ _
Rang 277-34 119-17 56.5-17 138-26 167-382 95-130 83-240 200-262 250-28 219-27 222-23 56.5-38 CODcr e 6 4 8 9 5 4 2
Aver 310 150 137 213 288 110 145 231 268 247 227 211age
Rang 142-16 47-73 30-68 50-94 71-92 24-48 25-81 71-118 40-148 70-85 83-111 24-163BODs e 3
Aver 156 62 57 68 87 40 57 95 94 82 97 81age
54
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Rang 49.5-84 19.9-30 7.1-23.3 37.9-71 30.2-50. 15.1-25. 20.2-37. 20.2-23. 29.6-5 39.0-51 44.8-5 7.1-84.1NH3-N e .1 .2 .1-2. .8 2 6 9 3 0.0 .0 1Aver 62.7 23.5 16.4 51.4 37.3 19.6 30.5 21.8 39.8 45 47.9 36.0
a g e _ _ _ __ _ _ _ _ _ _ __ _ _ _Volatilizati Rang 0.12-0. 0.14-0. 0.01-0.0 0.09-0. 0.05-0.1 0.02-0.1 0.02-0.1 0.04-0.0 0.07-0. 0.14-0. 0.12-0. 0.01-0.9
on e 23 94 8 20 2 1 0 5 07 15 13 4hydroxybe Aver 0.16 0.40 0.06 0.13 0.09 0.06 0.05 0.045 0.07 0.14 0.13 0.12
nzene ageRang <0.01-0 <0.01-0 <0.01-0. <0.01 2 01 01 02 <0.01 <0.01-0.Cu e ~~.19 .02 01 0.1-. <001-0 <001-0 <0.0-0 0.10<.01 19Cu Aver 0.06 0.01 0.01 <0.01 0.015 <0.01 <0.01 0.02 <0.01 <0.01 <0.01 0.015
_ _ _ _ _ _ _ _ _ a g e _ _ _ _
Rang 0.07-0. 0.06-0. <0.05-0. <0.05-0 1.01-10. <0.05-0. 0.17-0.5 0.17-0.2 0.06-0. <0.05-0 0.10-0. <0.05-1CZn e 12 17 09 .08 79 06 7 7 14 .24 13 .79
Aver 0.09 0.10 0.06 0.06 4.32 0.05 0.41 0.21 0.10 0.15 0.12 0.52a g e _ _ _ _ _ _ _ _ _ _ _ __ _ _ _
Rang <0.004 <0.004 <0.004 <0.04 <0.01440 <0.214-0 <0.004 <0.004 <0.004 <0.004 <0.004 .21Total Cr 1 2.1
Aver <0.004 <0.004 <0.004 <0.04 0.055 0.06 <0.004 <0.004 <0.004 <0.004 <0.004 0.013
Rang 2.5-17. 2.15-2. 2.5-6.0 4.2-5.7 2.4-17.1 1.5-3.4 1.8-4.1 2.9-3.8 3.4-5.4 2.1-5.0 5.8-5.9 1.5-17.1Oil e 1 7
Aver 4.4 2.3 3.7 5.1 9.3 2.2 3.0 3.4 4.4 3.6 5.9 4.3
Total P Rang 5.2-5.6 1.5-2.3 0.4-2.0 3.1-6.1 0.9-4.0 1.1-1.6 1.4-2.8 1.6-2.1 3.3-3.7 2.1-2.9 3.9-5.4 0.4-6.1
55
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Aver 5.4 2.0 1.4 4.4 2.1 1.4 2.4 1.9 3.5 2.5 4.7 2.9_age
Table 2-12 Monitoring results of the pumping stationis in Ningbo (1997.3.5-1997.3.6 Unit nig1L except pH)
Stati Item PH SS CODmn CODcr BOD5 NH3 -N Total Oil LASon P _ _ _
Rang 7.21-7.2 200.3-262. 19.2-20. 203-226 67.5-77. 28.1-41. 2.8-3.3 2.7-3. 0.56-0.9Mor e 6 7 2 2326 6 1 2.-335ning Avera 7.23 231.5 19.7 215 73 34.6 3.1 3 0.76
Rang 7.25-7.4 110.7-146. 26.9-21. 143-255 52.2-101 231-37 5.0-5.1 2.6-2. 1.20-1.5Mid e 3 3 3 0 9 0
ngan day Avera 7.34 128.5 24.1 199 77 30.1 5.1 2.8 1.35
Stati 8.-80 19-0e0911 .-.oan i NighRang 7.13-7.2 154.3-160. 8.3-28.0 189-309 70.9-118 29-6-32. 3.1-3.2 1.5-3. 1.03-1.5
Nigh e 7 3 9 _ _ 6 4t Avera 7.2 157.3 18.2 249 94 31.3 3.2 2.6 1.29
Range 7.13;7.4 110.7;262. 8.3-28.0 143-309 52.2-118 23.1;41. 2.8-5.1 6 0.56-1.5_ _ _ _ _ _ ~~7 71 6_ _4
Ave rage 7.26 172.4 20.7 221 81 32 3.8 2.8 1.13
Ning Rang 7.01-7.1 123.7-125. 8.5-12.8 66.9-110 24.9-35. 16.7-20 1.1-1.3 1.6-2. 1.05-1.2zhon Mor e 2 7 8.-2866910 0 2 1-.3 2 7
g ning Avera 7.06 124.7 10.7 88.5 30 18.5 1.2 1.9 1.16pum ge
56
Ningbo Jiangdongnanqu WWTP and Sewerage Project _ EIA
ping Rang 2 185.3;204. 15.6-15. 54.7-72. 19.2-28. 1. 5-2. 1.27-1.2saiMid Ran 721-. 18.-24 156-5 160-211 7 4 2.0-2.0 *6 7on day 7.32 195 15.6 186 64 23.8 2 2.1 1.27
Rang 7.21-7.2 133.0-138. 15.4-15. 139-162 44.7555 25.3-31. 1.9-2.1 4.0-4. 1.41-1.5Nigh e 6 3 7 ____ ___ 4___
t Avera 7.24 135.7 15.6 151 50 28.2 2 4.2 1.48ge
Range 7.01-7.4 123.7-204. 8.5-15.7 66.9-211 24.9-72. 16.7-31. 1.1-2.1 1.5-4. 1.05-1.52 7 _ _ _ _ 7 1 __ _ _ 4 5Average 7.21 152 14 142 48 23.5 1.7 2.7 1.3
Rang 6.99-7.0 96.3-100.3 8.0-8.1 40.1-42. 22.4-22. 15.7-15. 1.6-3. 0.37-0.5Mor e 6 963103 8081 9 9 7.-11 4 1ning Avera 7.02 98 8 42 23 15.7 1.1 2.5 0.44
ge
Xiao Mid Rang 7.18-7.3 100.0-103. 9.6-22.1 42.1-144 22.8-61. 13.1-15- 1.1-1.1 2.5-3. 0.51-0.5Mid e 1 7 6 3_____4___3
wen da Averapum y 7.25 102 16 93 42 14.2 1.1 3 0.52ping 1stati Nigh Rang 7.11-7.1 73.3-86.7 10.82-16 48.1-108 24.0-42 9 10.6-13. 1.3-1.4 2.1-2. 0.62-1.0on Nigh e 72296
Aera 7.14 80 14 78 33 12.3 1.4 2.4 0.81
Range 6.99-7.3 73.3-103.7 8.0-22.1 40.1-144 22.4-61. 10.6-15. 1.1-1.4 1.6-3. 0.37-1.0~ ~~~~1 733137 802. 0114 6 7 ____ 4 0
Average 7.14 93 13 71 33 14.1 1.2 2.6 0.59Mor1 Rang 7.28-7.3 24.0-52. 14.6-25. 1.0-1. 0.35-0.4Zho e 4 66.7-81.3 5.8-7.9 1 7 5.8-9.9 0.8-0.8 3 8n in g e_ _ _ 4_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 7_ _ _ _ 3__ _ _ _ _ _ _ _ __5
57
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
ngxi Avera 7.31 74 7 38 20 7.9 0.8 1.2 0.83ng ge___
pum Rang 7.40-9.1 71.7-84.3 9.1-11.4 36-44 22.9-24. 5.2-8.7 0.9-0.9 1.0-1. 0.32-0.3ping Mid e 1 7178.9.-1. 64 .287 0909 7 8stati day Avera 8.26 78 10 40 24 7 0.9 1.4 0.35one
NhRang 6.47-7.6 77.0-83.7 10.2-10. 38.1-56. 25.9-33. 9.1-28.1 1.0-1.0 2.7-2. 0.42-0.4Nigh Rag 2 70-37 8 1 9 9.-8. .0105
t Avera 7.05 80 10.5 47 30 18.6 1 2.8 0.44
Range 6.47-9.1 66.7-84.3 5.8-11.4 24.0-56. 14.6-33. 5.2-28.1 0.8-1.0 1.0-2. 0832-0.4
Ave rage 7.54 77 9 42 25 11.2 0.9 1.8 0.54
Zho Rang 7.02-7.0 133.0-162. 5-4.6 31.8-41. 18.8-19. 7.2-7.9 0.48-0. 0.8-1. 0.21-0.3ngsh Mor 9 3 45.6 6 4 7.-. 48 ___ 7an ning Avera 7.05 147.7 4.5 36.7 19 7.5 0.48 1.2 0.29St. _ _ _ _
Out Rang 6.98-7.0 127.0-184. 11.1-11. 62.1-64. 26.6-27. 9.1-93 0.6-0.7 1.6-3. 0.47-0.4fall Mid Rag 0 7 8 1 8 9193 0607 0 8
day Avera 6.99 156 11.5 63 27 9.2 0.7 2.3 0.48
Rang 7.06-7.0 77.7-108.0 .5-11. 54.1-60. 33.2-33. 6.8-8.4 0.6-0.7 2.2-3. 0.56-0.6Nigh __ _ _ 8 2____ ___5 6
t Avera 7.07 93 11 57 33.5 7.7 0.7 2.9 0.61
Rang 6.98-7.0 77.7-184.7 4.5-11.8 31.8-64. 18.8-33. 6.8-9.3 0.5-0.7 0.8-3. 0.21-0.6Rang8 777184.7 4.5-11.8 1 8 6.8-937 5 6
58
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Average 7.04 132 9 52 26.5 8.1 0.06 2.1- 0.46E rang 7.01-8.2 66.7-262.7 4.5-28.0 24.0-30 14.6-11 5.2-41.1 0.48-5 0.8-4. 0.21-1.5
~~rang ~~6 6.26. 4.-80 9 8 5.-11 .1 4 5E average 7.24 125 13.1 106 48.7 18 1.64 2.4 0.80
Table 2-13 Sewage Monitoring Results of the Pumping Stations in Ningbo (1997.9.7-1997.9.8 Unit mg/L exceptpH Coliform grou p/L)
Stati Item PH SS CODcr CODmn BOD5 NH3 -N Total Oil LASon mn 5 3 P
59
Ningbo Jiangdongnanqu WWTP and Sewerage Project ElA
Ran 6.82-6.84 60.0-65.0 27.0-35. 60.41317 2.7-9.2 7.2-9.5 46 0.2-4. 0.12-0.3Mor 6.26.46e0650 0 6.-07 2792 7295 46 4 3ning Aver 6.83 62.5 31.0 8. /8 6.0 8.4 0.95 2.3 0.23
Wen ~~ age
jaol Mid Ran 6.70-6.88 60.3-64.3 37.0-46. 8.9-11.7 7.9-9.3 1.05-1. 2.6-4. 0.11-0.2u Mid ge ____0 35 1 7
pum day Aver 6.79 62.3 40.5 10.3 8.6 1.20 3.4 0.19
ping Ran 45.0-49. 1.35-1. 3.1-5. 0.14-0.1stati Afte ge 6.63-6.83 62.7-75.0 0 6.8-10.3 8.5-8.9 65 6 8on rnoo Ae .36.
n Aver 6.73 68.9 47.0 8.6 8.7 1.50 4.4 0.16_ _ _ age_ _ _ _ _
Range 6.63-6.88 60.0-75.0 0 6.8-10.7 2.7-11.7 7.2-9.5 043-1. 0.2-5. 0.11-0.30 ~ ~ _____65 6 3
Ave rage 6.78 64.6 39.5 8.8 8.3 8.6 1.22 3.4 0.19
Hual Ran 6.84-6.87 56.7-88.3 38.0-51. 12.0-12. 5.6-10.1 7.0-24.5 94-1. 3.1-14 0.18-0.2shul Mor ge 0 1 2 .1 6
u ning Aver 6.76 72.5 44.5 12.1 7.9 15.8 1.11 8.6 0.22pum .. age
ping Ran 6.61-6.86 86.7-91.0 57.0-153 13.2-14. 5.4-19.7 0.80-0. 4.3-17 0.20-0.3
stati M id ge . __ __ _ 99_____
on day Aver 6.79 88.9 105 13.7 12.6 0.90 10.7 0.25_ _ _ a g e_ _ _ _ _ _ _ _ _ _
Afte Ran 6.59-6.94 84.0-93.3 27.0-87. 11.0-11. 5.7-21.0 0.49-1. 2.6-9. 0.14-0.5rnte 6.96.4 8.09. 0 5.-1. 04 1 9
n Aver 6.77 88.7 57.0 11.3 13.0 0.77 5.9 0.37
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Range 6.59-6.94 56.7-93.3 27.0-153 12.0-12- 5.6-14.1 5.4-24.5 0249-1. 2.6-17 0.14-0.5Range 6.59-694 56.7-93.30 1 561. 5I-5 *28 .1 9
Average 6.77 83.4 68.8 12.1 11.0 13.8 0.93 8.4 0.28
rRaen 6.73-6.89 80.0-81.3 29.0-37 7.0-8.9 4.4-5.3 3.0-3.8 0.49-° 0.2-0. 0.07-°Mor ge _ _ _ _ _ 0 88 3 2ning Aver 6.81 80.7 33.0 7.9 4.9 3.4 0.69 0.3 0.10
ageXiao Ran 6.75-7.42 83.3-128.3 32.0-39. 6.5-8.0 2.7-3.7 0.50-0. 0.2-0. 0.05-0.1wen Mid 6.57428e-183 0 6.980 21-373 1pum day Aver 7.09 105.8 35.5 7.3 3.2 0.71 0.3 0.08ping _ agestati Afte Ran 6.74-7.1 95.0-121.3 22.0-32. 3.1-13.7 2.6-3.5 0.67-1. 0.2-0. 0.09-0.2on 2rnouo ge2 0 12 5 0
n Aver 6.93 108.2 27.0 8.4 3.1 0.89 0.3 0.15ageRange 6.73-7.42 80.0-128.3 22.0-39 7.0-8.9 3.1-13.7 2.6-3.8 0.689-0. 0.2-0. 0.05-0.2
Ave rage 6.94 98.2 31.8 7.9 6.9 3.2 0.76 0.3 0.11Dah Ran 6.65-6.90 92.0-96.7 47.0-141 14.1-17. 4.7-4.7 1.78-1. 0.7-1. 0.32-0.9elu Mor ge 66-90 9.967 .0 _____ 5 84 1 5
pum ning Aver 6.78 94.4 94.0 16.0 4.8 1.81 0.9 0.64ping aesonti Mid Ran 6.66-6.87 102.7-126. 64.0-87. 12.4-32. 13.7-23. 4.5-6.9 0.71-1, 2.0-2. 0.80-1.1
on Mid__ge 7 0 9 2 970
day Aver 6.77 114.7 75.5 22.7 18.5 5.7 1.82 2.4 0.95
61
Ningbo Jiangdongnanqu WWTP and Sewerage Projcct EIA
AeRan 6186695113.0-117. 73.0-78. 14.1-16. 1.60-1. 2.5-2. 0.72-1.0Afte 6.6-.9 0 0 4 4256 71 8 3
n Aver 6.82 115.0 75.5 15.3 4.9 1.66 2.7 0.88age
Range 6.65-6.95 92.0-126.7 47.0-141 12.4-32. 13.7-23. 4.2-6.9 1.60-1. 0.7-2. 0.32-1.1Range 6.5-6.95 9.0-126.7 .0 9 2 4269 93 8 0
Ave rage 6.79 108.0 81.7 22.7 16.6 5.1 1.76 2.0 0.82
Mor Ran 6.80-6.84 120.7-147. 208.0-26 57.6-67. 42.0-90. 3.4-9.7 3.96-4. 2.7-7. 1.19-1.4ning ge ~~7 4.0 7 4 5
ning g 6.82 134.2 236.0 32.7 66.2 6.6 4.28 5.1 1.34
Kon Ran 6.70-6.95 156.0-163. 155.0-21 41.0-64. 4.0-8.3 3.40-3. 2.8-5. 1.57-1.6Kon Mid 6g7-695 0 3.0 1 4083 65 0 2
pum day Aver 6.83 159.5 184.0 52.6 6.2 3.53 3.9 1.59
ping Ran 135.0-138. 177.0-20 11.0-76. 3.31-4. 3.3-7. 1.41-1.7stati Afte ge 6.72-6.77 3 1.0 4.5-8.7 59 2 2
on rnoo Avern 6.75 136.7 189 44.0 6.6 3.95 5.3 1.57
120.7-163. 155.0-26 57.6-67. 11.0-90. 3.31-4. 2.7-7. 1.19-1.7Range 6.70-6.95 0 4.0 74 3.4-9.7 59 4 2
Averag 6.80 143.5 203 62.7 54.3 6.5 3.92 4.8 1.50
nZghxoi Mor an 6.99-7.04 66.0-79.7 27.0-44 8.5-10.3 2.9-4.4 1.6-3.5 63 0.3 0.13-0.1
nglu ning Aver 7.02 72.9 35.5 9.4 3.7 2.6 0.57 0.3 0.14
pum age __ _
stati Mid Ran 6.92-7.02 75.3-105.0 25.0-32. 4.8-5.0 1.7-3.4 0.61-0. 0.5-0. 0.11-0.1stati day 4.8-5.0e1.7-3. 79 6 4
62
Ningbo Jiangdongnanqu WWTP and Sewerage Project _ EIA
on Aver 6.97 90.2 28.5 4.9 2.9 0.70 0.5 0.13a g e_ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _
After an 6.98-7.13 77.7-80.3 58.0-64. 3.8-4.2 1.4-3.0 87 0.4-0. 0.1450.2noon Aver 7.06 79.0 61.0 4.0 2.2 0.68 0.5 0.21
age _ _ _ _ _
Range 6.92-7.13 66.0-105.0 25.0-64. 8.5-10.3 2.9-53.0 1.4-3.5 87 6 0.11;0.2__________ 0 87 6 7
Ave rage 7.02 80.7 71.7 9.4 4.2 2.5 0.65 0.4 0.16
IRan 6.76-6.80 65.3-79.3 47.0-73. 12.1-14. 15.9-17. 4.0-4.8 1 .18-1. 1.2-1. 0.55-0.6Mor g ~ _ _ _ 0 6 1 69 7 6ning Aver 6.78 72.3 60.0 13.4 16.5 4.4 1.44 1.5 0.61
_ _ _ _ _ a g e _ _ _ _ _ _ _ _ _ _ _
Ran 6.92-6.95 69.3-73.3 59.0-101 14.7-18. 4.1-4.4 1.59-1. 1.1-2. 1.42-0.7Gaot Mid 6.26.5 6.37. .0 4 4.-. 65 5 0ang day Aver 6.94 71.3 81.5 16.6 4.3 1.62 1.8 0.56pum ____ age_
_ _ _
stati AfterRan 6.77-6.77 73.0-73.3 73.0-98. 9.9-17.8 3.7-4.5 68 3.2-3. 0.5010.7on noon Aver 6.77 73.2 85.5 13.9 4.1 1.56 3.6 0.61
___ __ age _ _ _ _
Range 6.76-6.95 65.3-79.3 47.-104 1261-14. 9.9-18.4 3.7-4.8 1.18-1. 1.193. 0.4210.7
Average 6.83 72.3 75.6 13.4 15.7 4.3 1.54 2.3 0.5922.0-264 0.43-4. 0.2-17 0.05-1.7E range 6.59-7.42 56.7-163.0 °0 6.8-67.7 2.7-90.4 1.4-24.5 59 .1 '; 2
Eaverage 6.85 93.0 77.4 19.6 16.7 6.3 1.54 3.1 0.52
63
Ningbo Jianigdonignanqu WWTP and Sewerage Project EIA
Table 2-14 Sewage Monitoring Results of the Proposed Renovation Pumping Stations (2002.6.7-2002.6.8 Unit:
mga/L xcept pH, Conliform unit: group/L)
Sta Itm H OFecal nAmmoi LAtio O Item pH DO CDcCOD BODS TP conlifor nia
n ~~ ~~~~ ~~r Mn nigopnitrogn m group e
_______ ~~~~~~~~~~~~~~~~en
6.75-8. 2.07-2. 102-1 25.9-4 65.4-7 1.96-1.9 I?2.4X 7.60-1 1.18-1. 1.13-1.
Morni Range 78 35 29 5.4 3.7 9 105 1.0 29 25
ng Average 7.77 2.21 115.5 35.7 69.6 1.98 >12.45X 9.30 1.24 1.19
_______ _________ _______ ~~ ~~~105 9 3 . 41 1
Nin Range 6.74-6. 2.15-2. 112-1 26.5-4 38.2-4 1.16-2.3 X2.4 X 7.05-1 0.82-1. 0.94-1.
gzh Midda 75 20 84 3.3 7.3 4 105 0.2 63 21
ong Y Average 6.75 2.18 148 34.9 42.8 1.75 >2.4 X 8.63 1.23 1.08
pu 105
mp Range 6.81-6. 1.75-2. 200-2 26.8-4 65.2-1 2.28-2.2 2.4 X 8.82-1 2.27-2. 1.05-1.
ing Aftern 88 93 62 2.7 35 9 105 0.4 76 39
stat on> .ion Average 6.85 2.34 231 34.8 100.1 2.28 12045X 9.61 2.52 1.22
Range 6.75-8. 1.75-2. 102-2 25.9-4 38.2-7 1.16-2.3 2.4 X 7.05-1 0.82-2. 0.94-1.
78 93 62 5.4 3.7 4 105 1.0 76 39
Average 7.12 2.24 164.8 35.1 70.8 2.00 >,2.4 X 9.18 1.66 1.16
Wu Morni Ra e1 6.82-6. 2.45-2. 189-2 38.3-4 59.2-1 2.50-3.6 Ž2.4X< 16.0-2 1.44-2. 0.97-1.
64
Ningbo Jiangdongnanqu WWTP and Sewerage Project _ _ _ EIA
Average 6.90 2.60 203.5 43.5 124.6 3.09 z2.4X 21.4 1.78 1.09105
7.01-7. 2.03-2. 189-3 39.7-5 70.4-1 3.54-3.7 ¢2.4 X 16.3-1 1.93-3. 1.01-1.Midda Range 02 11 12 0.5 35 0 105 9.6 44 17
Average 7.02 2.07 250.5 45.1 112.2 3.62 )2.4X 18.0 3.69 1.09_ _ _ _ _ _ ~~105 __ _ _ __ _ _ _ _ _ _
1.50-1. 215-2 41.0-5 69.8-1 2.71-3.0 ¢2.4 X 13.2-1 3.39-6. 0.98-1.Aftern Range 7.02 71 57 3.8 54 3 105 4.2 74 13
oon Average 7.02 1.61 238 47.4 111.9 2.87 ¢2.4X 13.7 5.07 1.06105
6.82-7. 1.50-2. 189-3 38.3-5 59.2-1 2.50-3.7 >2.4 X 13.2-2 1.44-6. 0.97-1.Range 02 75 12 3.8 90 0 105 6.8 74 20
Average 6.98 2.09 230.1 45.3 116.2 3.19 )204X 17.7 3.51 1.08______ ~~~~~ ~~~105_ _ _ _
Hu | 7.13-7. 2.17-2. 56.4-6 25.0-3 25.9-3 0.308-0. ¢2.4 X 1.45-9. 0.63-0. 0.98-1.an Morni Range 19 33 5 3.2 9.8 434. 105 70 78 00n a ng >,2.4 X 55.1 09nna ng Average 7.16 2.25 60.7 29.1 32.9 0.371 105.58 0.71 0.99
p u 2.96-3. 2.09-2. 79.2-8 26.7-3 23.0-2 0.355-0. 2.4 X 7.63-1 1.18-1. 0.88-1.Mp Midda Range 00 20 0 4.7 5.8 562 105 0.2 19 15ing MidIagstat Y Average 2.98 2.15 79.6 30.7 24.4 0.459 52.4X 8.92 1.19 1.02ion 105 ____
Aftern 5.72-6. 1.21-1. 105-1 27.2-4 21.8-3 0.51-2.2 >?z2.4 X 5.41-1 1.40-1. 0.88-1.oon Range 33 30 31 1.5 0.4 0 105 1.0 78 16
65
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Average 6.03 1.26 118 34.4 26.1 1.36 2.4 X 8.21 1.59 1.02______ ______ ~~105
Range 2.96-7. 1.21-2. 56.4-1 25.0-4 21.8-3 0.308-2. 2.4 X 1.45-1 0.63-1. 0.88-1.Range 19 33 31 1.5 9.8 20 105 1.0 78 16
Average 5.39 1.89 86.1 31.4 27.8 0.730 )12.45X 7.57 1.16 1.01_________________ ~~~~~~~~~105
2.96-8. 1.21-2. 56.4-3 25.0-5 21.8-1 0.308-3. )2.4 X 5.41-2 0.82-6. 0.88-1.E range 78 93 12 3.8 90 70 105 6.8 74 39
E average 6.50 2.07 160.5 37.2 71.6 1.75 >2.4X 11.5 2.11 1.08
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Sampling analysis was carried out on the 4 mainly gravity sewage outlets from 10-13 March 1993,i.e. Yijiangan pumping station, Western Jiangxiaqiao pumping station,
Western Ling Bridge pumping station. Another survey was carried out on5-6 March ,1997 by Environment Monitoring Center to Yijangan pumping
station ,Ningbo School pumping station ,outlet on east side ofZhongshantong Street ,Xiaowen pumping station ,North Zhongxing Roadpumping station .Analysis on the monitoring results in 1993 shows that the
item of pH volatilization hydroxybenzene, Cu, Zn, Total Cr and oilconform to GB8978-1996 Class II "Integration Effluent Quality
Standard". Other items exceeds GB8978-1996 Class II "IntegrationEffluent Quality Standard", of which BOD5 exceeds 1.7 times, the worst one.
According to the analysis to each pumping station, the residential area(Yingjiangan pumping station and Kongpu pumping station), the indexes of
ammonia nitrogen and total P are higher.
According to the 9.7-9.8 monitoring results on 5-6 March 1997, the items of pH, SS,
CODcr, ammonia nitrogen, oil LAS conform to G138978-1996 Class II "Integration Effluent
Quality Standard", and total P exceeds the standard a little .The analysis of the pumping
stations shows that the sewage of Yingjiangan pumping station is the worst one for this
pumping station is located at the residential area so CODcr, ammonia nitrogen, total P exceed
the standard more seriously.
Based on the analysis on the three renovation pumping stations, the items of ammonia
nitrogen LAS, oil in the sewage discharged conform to GB8978-1996 Class II "Integration
Effluent Quality Standard". pH, CODcr. BOD5 , TP and Coliform exceed the standard. The
analysis in each station shows that the items of CODcr. BOD5 , ammonia nitrogen and
total P indexes in Wudongzha pumping station and Ningbo School pumping station are
higher due to their locations in the residential area . The pH effluent of Huanchengnanlu
Pumping station shows a certain degree of acid due to the industrial enterprises in the area.
Other survey show that the inlet water quality of Ningbo Jiangdongbei WWTP in 2001
was: BOD5: 98mg/1l CODcr: 266mg/L, SS: 209mg/L, NH3-N: 17mg/L, TP: 5.17mg/L
The analysis on the monitoring results shows that the quality of sewage in Ningbo varies
greatly. But the overall analysis shows that the total pollutants in the sewage of Ningbo are
lower due to the combined sewers accounting for a larger part of the sewerage, the content of
pollutants is diluted by storm water. At the same time most enterprises are located at the bank
of the rivers their sewage is discharged directly into Yong River and Fenghua River without
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
entering into the sewage pumping stations.
In recent years with the faster development of the city area, there are many houses have
been dismantled and built and many enterprises in the urban area have been relocated,
therefore, The monitoring results in Huanchengnanlu pumping station, Wudongzha pumping
station and Ningbo Middle School pumping station can reflect the quality of the inlet sewage
in the three service areas to Jinatongnanqu WWTP more objectively.
2.5.2 Design Sewage Quality
1, Influent water Quality
The design influent quality of Jiangdongnan WWTP is as follows
BOD5 120mg/L
CODcr 240 mg/L
SS 150 mg/L
NH3-N 30 mg/L
TP 4 mg/L
2, Effluent water Quality
The effluent water quality of Jiangdongnanqu WWTP is determined according to
GB8978-1996 Class II "Integration Effluent Quality Standard"
BOD5 S 30mg/L
CODcr 120 mg/L
SS 330 mg/L
NH3-N < 25 mg/L
TP <l I.0mg/L
2.5.3 Degree of Treatment
The treated degree of the WWTP should reach (pollutant removal rate ):
EBOD )75%
ECOD,>50%
ESS>,80%
ETPA75%
2.6 Project Management and Implementation Plan
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Ningbo Jiangdongnanqu WWTrP and Sewerage Project EIA
2.6.1 Principle and Procedures for Implementation
The implementation of the sewage treatment plant project shall be in compliance with
construction and approval procedures of domestic capital construction project, and it is
necessary to create good conditions for using loan from the World Bank by cooperating
actively with departments concerned.
A project implementation organ will be set up. Acting as project implementation unit and
user of the imported equipment, it is responsible for organizing project implementation,
project coordination and management. The authorized person in charge of the project
implementation organ shall be responsible for decision-making, commanding and execution
as well as internal and external negotiation and liaison in the course of the project
implementation. The organization, which is authorized to deal with foreign business, shall be
appointed as the Buyer of the imported equipment, and shall responsible for foreign
commercial and technical negotiation and liaison.
The design organization, equipment supplier and construction contractor of the project
shall go through necessary legal formalities with the project implementation organ and any
behavior of breach of contract shall be settled in accordance with the relevant laws and
regulations issued by the state
2.6.2 Project Construction Management Institution
The construction management of this project shall be in the charge of "Ningbo
Municipal Development Planning Commission" and "Ningbo City Construction
Commission" under the Ningbo municipal government.
"Ningbo Municipal Development Planning Commission is responsible for working out
yearly and long-term plan for the city' s national economy and social development and their
comprehensive balance and coordination. It is also responsible for working out the plan for
using foreign loan and responsible for approval of the project using the loan and examination
and approval of the feasibility study report of the said project.
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
Ningbo City Construction Commission is responsible for managing the city planning and
construction.
2.6.3 Project Operation Management
Ningbo City Construction Commission will appoint "the Urban Infrastructure
Development Office of Ningbo municipality" to act as the construction management organ
of this project as per previous practice of the project implementation, which is supported by 5
functional departments:
(1) Administrative department
Responsible for daily administrative affairs as well as reception of and liaison with the
project performers.
(2) Planning and financial department
Responsible for arrangement of project financial plan and implementation plan; handling
formalities about contract and agreement with the project performers as well as formalities
about fund application, income and expense.
(3) Construction management department
Responsible for coordination and commanding of civil works and equipment installation;
supervision and inspection on construction progress, schedule, quality, and safety as well as
acceptance of the project.
(4) Equipment and material control department
Responsible for ordering, procuring, storing and allocating the equipment and materials
for the project.
(5) Technical management department
Responsible for management of technical documents and files; assisting in technical
interpretation for foreign experts working on the site; taking care of joint review on designed
70
Ningbo Jiangdongnanqu WWTP and Sewerage Project EIAdrawings; handling relevant technical problems and organizing technical training and
examination.
2.6.4 Schedule of Project implementation
The implementation schedule of this sewage treatment plant project is detailed in Table
2-16.
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Ningbo Jiangdongnanqu WWTP and Seweragc P'roject EIA
Table 2-16Schedule Program for Jiangdongnan Sewage Treatment Plant Schedule Program for Jiangdongnan Sewage
Treatment Plant200! 2002 = 2003 2004 2005 2006 2007 2008
No\ Item I - 12 1- 6 7-12 1- 4 5 - 8 9 - 12 1 - 12 1- 12 1-12 1-12 1-12
2 -aisal t s u A ppniJ
4 Lam n rg9ationl5 fil kot I T, f F /T,W1 Bidding
6 A -I I N U ItDetail design
7 Cshonpii atcicn
8 -~Lf1iY - -- --
8 Construction
10 Test running
1 ICompletion/Acceptance
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Ningbo Jiangdongnanqu WWTP and Sewerage Project EIA
73
2.7 Project Construction Management
2.7.1 Construction Period
The construction period of the project will last for three years
2.7.2 Construction machines
General construction machines
2.7.3 Main Earthworks
The project mainly includes the construction of the WWTP and sewerage and river
crossings.
According to the information from the unit conducting the feasibility study report, the
I and 3,excavation of the WWTP will be 63000m fill, 76000 m . All the excavation earth can be
used for fill back besides that 13000m3 backfill will be needed.
Two methods will be used for sewerage networks, one is excavation of groove method
construction for small diameter pipes, which need to excavate earth of 100000m3 of which
83000 m 3will be used for backfill and 1000Gm 3 gravel and earth will be used to earth up;
another is push-pipe construction method for larger diameter pipes and construction
excavation will be 36000m3 s the abandoned earth will be 53000m 3
The pipeline sinking process will be adopted .Earth excavation is needed before piping
sinking and the amount of earth excavation is 3200m3 ,and The total 2580m3 is needed for
fill All earth fill will be taken by earth excavation ,and there will be 620m3 of abandoned
earth .
2.8 Pollution Sources Analysis of the Project
2.8.1 Pollution Source Analysis in the Operation Stage
The main pollution sources are discharged effluent grit and other solid wastes.
2.8.1.1 Effluent of the WWTP
Ningbo Jiangdongnanqu WWTP & Sewerage ProjectBased on the feasibility study report the design capacity of the WWTP is 160000 m3 /t
and this capacity cannot meet the sewage volume discharged in the area ,therefore the WWTP
will operate in full load and the discharged effluent will be 160000 m3 /t.
Table 2-17 Effluent load of Jiangdon anqu WWTPProject Influent Effluent Removal Discharge Removal
(mg/L) rate (%) volume volume(mg/L)(td(t)
BOD5 120 < 30 2 75 4.8 14.4
CODcr 240 < 120 2 50 19.2 19.2
SS 150 < 30 > 80 4.8 19.2
NH3-N 30 < 25 4 0.8
TP < 1.0 > 75 0.16 0.48
According to the feasibility study report the discharged effluent of the WWTP will meet
the standard of Class II .The table 2-16 shows the total discharge of treated sewage has been
decreased greatly this is very important to the pollutant discharge volume control.
Wastewater generated by the staff of the plant is about 15 m3/d, which will be treated
directly in the WWTP.
Workers living wastewater directly discharge into the waste water treatment plant. In this
plant there are 70 workers whose wastewater discharge volume is 15 m3/d. the wastewater
volume is so small that it do little harm to the plant.
2.8.1.2 Solid Wastes of the WWTP
The solid wastes of the WWTP include dewatered sludge, fine and coarse grille dregs,
grit and scruff and living garbage.
The dewatered sludge comprises many organic elements, which can emit foul smell to
affected ambient air quality. It is easy to move with water to pollute the environment as it
consists of very fine particles.
Most of the fine and coarse grille dregs are solid block matters, which comprise of
inorganic and organic matters .The characters of them are similar to living garbage. The scruff
of sediment tanks will be absorbed by vacuum suck-cart to be disposed like substance in the
septic tanks.
According to the FSR the pollutants of the project area shown on the following table:
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
Table 2-19The Discharges and Way of Treatment of Pollutants in the
Operating Period
Type of pollutants Discharge Way of treatment
Effluent water 160,000m3 /d Drained into Fenghua River
Grille dregs 1.6t/d Sludge landfill
Grit 3.2t/d Sludge landfill
Sludge 296t/d Sludge landfill
Living garbage 0. 1t/d Unified treated at
destruction plant
Odor Drained unorganized
The sludge comprises of organic matters (over 50%), other components are earth
particles and other inorganic particles .The organic matters in the sludge are easy to
decomposed to emit foul smell to pollute environment. It is easy moved with water t pollute
surface water and ground water. The main components of the dregs of fine and thick grilles
are organic fibers including small pieces of wood, cloth and other organic fibers and small
plastic begs and etc. and in summer there are some residue of melon and fruit. Sink grit
comprises of large inorganic particles, mainly mud sand, stone and etc. The character of grit
in the thick grids is stable and not easy to decompose and emit foul smell.
2.8.1.3 Odor
The odor in this project will mainly come from thick and thin grids, grit sedimentation
tank, radial-flow initial sedimentation tank, aeration tank, radial-flow secondary
sedimentation tank, sludge dehydration pump house, pollution drainage opening, and sludge
landfill. It is mainly composed of H2S and NH3. The odor strength changes with seasons and
temperature: as in summer the temperature is high, the odor is stronger, while in winter the
temperature is low, the odor is less strong. According to the results of investigation on the
sewage treatment plant at Jiangdongbei District of Ningbo, the odor intensity at 80m away is
Based on the feasibility report the intensity of NH is 0.255kg/h and H2SO is 0.096kg/h.
2.8.1.4 Noise
The noise of the WWTP mainly comes from positions of the fan house, debater pumping
house, inlet pumping house, sludge pump well and etc, of which the fan house is the most
76
Ningbo Jiangdongnanqu WWTP & Sewerage Projectnoisy position. There are 8 fans in the fan house and sound level is 95 dB. The sound level of
dewater pumping house is 80 dB, inlet pumping house 75 dB, sludge pumping well 70 dB.
In addition, there is noise from the sewage-pumping house with sound level of 85 dB.
2.8.2 The analysis of the pollution sources during the operation
period
The main pollutants in the construction period are noise, dust, waste gases and water and
abandoned earth generated from the WWTP, pumping stations and sewerage networks.
2.8.2.1 Waste water
The main waste water sources are raining water, sewage from the construction site,
pilling slurry water and hydrocele on the construction site .The construction period will last
for 2 year and most of the builders will live in the construction site .The domestic sewage
from those people is also an important pollution source.
2.8.2.2 Waste gases
The main waste gases in the operation period are gases generated from construction machinesand exhausted gases .The main pollutants of exhausted gas include CO, nitrogen-oxygencompounds, hydrocarbons etc. To construct treatment tanks, roads and pipelines, landleveling and excavation will have to be encountered which, as a consequence, will damagevegetation in the plant area, expose surface soil and flying dust; during construction ofbuildings or structures, concrete or mortar mixing machines will send cement powder flying;on trunk roads to the construction site, because of additional vehicles needed to carryconstruction materials, the amount of traffic creating dust and loss of materials will increase;due to fuel consumption during engineering construction, waste gases or atmospherepollutants will be produced, including S02, N02, CO, and TSP.
2.8.2.3 Solid wastes
Solid wastes in the construction period mainly are building garbage, abandoned earth
and living garbage generated by the builders. It is estimated that 13000m 2houses will be
dismantled for the project. Generally the bricks in the dismantled houses can be reused, other
part will become construction garbage The construction n garbage is about 7150m3
The construction of the WWTP and pipeline networks will generate large amount of
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Ningbo Jiangdongnanqu WWVTP & Sewerage Project
construction garbage. According to the survey 0.3 ton of construction garbage will be
generated with per m2 construction area The project will generate 2693.1 tons construction
garbage and mainly consists of broken tiles, gravel, brick, sand stones etc. building materials.
The abandoned earth in the construction period will be 53620m3according to calculation,
the construction period will last for 2 year and most of the builders will live in the
construction site, which will produce a certain amount of living garbage
2.8.2.4 Noises
During the construction period, the noise mainly engendered by various
kinds of constructional machines and trucks, which are shown in Table 2-18
Table 2-18 The tested values of noises engendered by constructionalmachines
The distance Thebetween the testing maximum
No. Type of machine Model site and the noise levelmachine tested LAeq (dB)
1_ TruckloaderZL40590(i)1 Truck loader ZL40 5 902 Truck loader ZL50 5 903 Bulldozer T140 5 864 Wheeled hydraulic W4-60C 5 84
excavator
5 Punched well drilling 22 1 87machine
6 The taper concrete JZC350 1 79mixer of reversed
materials exit
7 Transportation of 15 80-95vehicles
3 Survey of the Environment
3.1 Natural Environment
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
3.1.1 Geographical Position
Ningbo City is located at 121030'E-122°55'E and 29°31'N-30 000'N. it is in the
southeast seacoast of China and the east part of Ningshao Plain. It is close to the East Sea in
the east, facing Zhoushan Islands across the sea. It bounds Yin County in the south, Yuyao
City in the west and Cixi City in the northwest. The area of Ningbo City is 1033 km2.
The planned sewage treatment plant is located in Yin County, south to Sanjiangpian
district, 75m from Hangzhou-Ningbo expressway in the north and lOOm from Fenghua River
in the east. In the south of the plant boundary there is a village named linjia village and some
farmland. Some industrial enterprises are located in the east of the plant.
Ningzhong pumping station is located under the Fenghua River Bridge of Xingning
Road at the West Bank of Fenghua River and east of Ningbo Middle School. The other sides
are highways. As the pumping station is less than 50 m to the traffic trunk line, it is zoned as
Class 4 noise zone.
Wudongzha pumping station is located between Xingning Road of Jiangdong District
and Fenghua River and there are no environmental sensitivity points around the location. It is
zoned as Class 4 noise zone. Huangzhengnan Road pumping station is located at the bank of
Fenghus River in Duantang, Haishu District, and there is a frigorifico and several other
factories. It is zoned as Class 3 noise zone.
The WWTP is located at Yinzhou Center District, and the surround area of it are planned
as industrial zone belong to Class II zone for air quality zoning .The water quality of Fenghua
River in the section is planned as Class IV. The north side of it is Hangzhou to Ningbo
expressway .The boundary noise in the north side is Class 4 zone, and other sides are zoned as
Class 3.
3.1.2 Topography and Physiognomy
The topography of the area of Ningbo is higher in the southwest and lower in the
northeast .The Siming Mountain in the southwest is the extension of Tiantai Mountains. Haiji
Plain is in the north. Take Yangjiaojian, Hemudu as bound, Yaoci Plain is in the west and in
the east is Ningbo plain. Ningbo Plain is surrounded by mountains in the east, west, and south
side. The direction of mountains and plains is under the control of the Chinese geologic
79
Ningbo Jiangdongnanqu WWTP & Sewerage Projectstructure system of east north and north-northeast.
Sliming Mountain belongs to corroding structure and low mountain topography. The
highest peak in the mountain is 979m above the sea level. In the southeast is the extension of
Tiantai Mountain to the north and east, and the highest peak of Siming mountain is 656 m. In
the Northwest, from Yuyao to Xiepu, Zhenhai, the topography is upland extended to the
direction of east and west, which traverses between Yuyao and Cixi. The gentle slop upland
between Yong River and Xiaoxia River extends to Yong River estuary and Jinshan Mountain
in the direction of east and north. In the west side of Yong River estuary is coastal beach
physiognomy and in the east side is seawater erosion coast physiognomy and to form
deepwater seaport.
Ningbo plain is divided by Yong River and its two branches. Fenghua River and Yao
River into three areas i.e. the areas of Ningdong. Ningxi and Ningbei. Between the Ian River
and Tong River, the branches of Fenghua Rive, is Fenghua Plain. In the north of Yuwang
mountain is Beilun Plain. . Ningbo is situated in the Yong River valley, with flat topography;
numbers of rivers, broad maritime space and long coastal line, which is tending to stable. The
urban area is 3 m above sea level (Yellow Sea level)
the earthquake intensity-zoning map of China, the region' s earthquake intensity is
Grade 6.
Ihere are two types of soil-alluvial soil and paddy soil at the site of
the plant. The profile structure of alluvial soil consists of layers of surface
soil/subsoil/parent material or surface soil/subsoil/salt-containing parent
material. The depth of the soil layer is about 1 m. The soil is characterized
by a large plH variation, a loose texture, good aeration condition and water
permeability, a dampness regolith, and easiness of tillage. The parent material
of paddy soil is Ancient River or lake or lake-sea facies deposit, belongs to
factitiously cultivated soil.. The properties of the paddy soil are reflected
by moderate texture, proper pHl range, deep soil layer, hi.gh curing degree, no
special disturbance layer, and easiness for amendment and cultivation. It is
mainly used for planting food crops.
The soil. in this region is highly slaked and cultivated soil with high
productivity. It is mainly used for planting vegetables and rice crop.
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
The project area is planned to be a central area for economic development,
since economy in this district is already comparably well developed. The land
to be occupied by the sewage disposal plant has relatively high productivity,
and is mainly used for planting vegetable; thus its output value is rather high.
The area surrounding the plant is fairly flatter, thus is suitable for various
municipal construction. The soil is stable and highly resistant to erosion since
the land is flatter and the soil contains as high as 3% of organic matter.
3.1.3 Meteorology
Climate of Ningbo belongs to subtropical and monsoon one, its four seasons
are clear, and it is mild and humid with abundant rainfall, longer sunshine and
long frost-free period. Monsoon of winter and summer alternates obviously.
Annual average temperature: 16.9 0C;
Highest temperature: 38.7°C;
Lowest temperature: -8.8°C;
Annual rainfall: 1374.7mm;
Maximum rainfall per hour: 100.9mm
Annual average evaporation: 1320.1mm
Annual sunshine: 1800.4h
Annual average relevant humidity: 82%
Annual averages atmospheric pressure: 1016. 3hPa
Annual average wind velocity: 2.9m/s
Maximum wind velocity: 19.7m/s
Prevailing wind direction in winter: northwest
Prevailing wind direction in summer: south and southeast
Annual frost-free period: 228 days
Ground water
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
Total ground water resources in Ningbo City is 1.793 billion m3, of which,
0. 312 billion m3 occurs near surface area. It is mainly composed of void water
of friable rock, crack water of bedrock and mineral water, etc. Total annual
recharge to the underground water of the plain area is 0. 574 billion m3, including
0.536 billion m3 fresh water and 38 million m3 salty water.
There are two layers of deep void confined water in Ningbo and Fenghua River
plains, and the first layer is 50-70m deep, containing salty water, small amount
of fresh water occurring in Nanmen of the old urban district and Buzheng of Yin
County; the second layer occurs below 70'-100m, with 158 km2 fresh water body
around the center of the old urban district and an annual current water extraction
of 9.52 million m3.
3.1.4 River System
The network of watercourses is densely covered in the Center District of
Yin County, which is the site of the project. From ancient times to the present,
the network of watercourses is the most important water conservancy facilities
for floocl discharge, waterlogging drainage, freshwater storage and irrigation
in Yin County. The river system is the important water source for domestic and
industrial usage. The main river in the area is the Fenghua River, which is the
drainage-receiving river of the project. The inland water system includes the
Fenghua River, Nantang River, Zhongtang River and Qiantang River etc.
Fenghua River is one of the two big branches of Yong River. Its main stream
is Yin River and its branches include Shan River, Dong River and Ian River. The
length of the main stream is 96.1 km and the catchment area is 1,965 km2. The
average amount of flow-off is 1. 196xlO"' m3/yr. The width of the Fenghua River
varies between 130 220 m and the average depth is 5 m. Its average flux is 75
m7s with a maximum flood discharge of 5000 mi/s and a lowest flux of almost 0
m'/s in the dry season. In general, the dry season include November, December,
January and February, the level period is during April and May, and the high
flow season is during June, July, August, September and October.
The middle and down reaches of the Fenghua River is tidal river. The average
amount of flood tide flow for years is 789 million cubic meters and the average
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
amount of ebb is 10. 91 million cubic meters. The flow-off is only accounts for
5% 23% of the flood tide amount. According to the hydrologic data of Chenglangyan
Hydrographic Station, the average high tidal level of Fenghua River is 1. 14 m
with a highest level of 2.86 m (Yellow Sea level). The average low tidal level
is - 0.43 m a lowest level of - 1.53 m (Yellow Sea level). The average difference
between the high and the low tidal levels is 1. 57 m with a biggest difference
of 3. 14 m.
The Yong River system, whose main branches are Yuyao River and Fenghua River,
is one of the eight-largest river systems in Zhejiang Province. The confluence
of Yuyao River and Fenghua River is at Sanjiangkou in Ningbo. The river flow
toward northeast to East Sea by way of Zhenhai estuary. The length of the main
stream of Yong River is 26 km. The drainage area of Yong River is 5544 km2 and
the catchment area is 4, 254 km2. The total amount of runoff of Yong River is 3. 702
billion cubic meters. The width of the Yong River is 200>700 m and the average
width is 262 m. The average depth is 6 m; the most shallow depth is 2.8>3.0
m. The most flood discharge is 6,500 m3/s but the discharge sometime is nearly
0 m2/s at dry season. The amount of runoff is related to the precipitation.
The main functions of Yong Rive
Rare shipping, are flood discharge, waterlogging drainage and sewage
reception. Yong River is of irregular half-day-tide type. The highest tidal level
in 50 years is 4.96 m (Wusong water level). The average high tidal level in many
years is 2. 94 m. When the discharge of ebb tide is 290 690 m3/s in Sanjiangkou,
the amount of flow-off accounts for 10% 24% of discharge of ebb tide. The average
low tidal level is 1. 19 m, the biggest difference between the highest and the
lowest tidal level is 3.53 m. The average discharge of ebb tide in different
section of Yong River is listed in Table 3-1. The hydrologic data of Yong River
is presented as Table 3-2.
Table 3-1 Average discharge of ebb tide in different section of Yong River(m 3 /s)
Guaranteed rate Zhenhai Mix SanjiangkouP=10% 1200 970 690P=50% 820 640 460P=90% 450 370 290
Table 3-2 Discharge of tide at Zhenhai*Tidal difference frequency ( %) 90 75 50 25 10
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
Tidal difference (m) 0.85 1.20 1.65 2.20 2.65
Amount of rising tide (104 m3 ) 900 1,280 1,750 2,340 2,760
Duration of rising tide (nmin) 360 360 360 360 360
Discharge of rising tide (m3I/s) 416 592 810 1,083 1,277
Amount of ebb tide (104 m3 ) 1,040 1,420 1,900 2,520 2,920
Duration of ebb tide (min) 385 385 385 385 385
Discharge of ebb tide (m 3 /s) 450 614 822 1,091 1,260
Ratio of runoff and ebb tide ( %/) 7 5.4 4 3 2.6
*The tidal level is Wusong water level.
Table 3-3 Statistics of Concatenation Flux by Years of CenglangyanStation Near the Outfall
Average Accumulativevelocity of flow Average flux total of flow of
Year Date velocityMof flm w (m 3 /s ebbtide
( ni_ __ ___s_ _ 10 4 M 3 )
1989 1/9- 14/0 0.43 495 13370
30/8 - 3/9 0.69 883 148481990
4/9 - 11/9 0.66 785 17096
1985 22/8 - 23/8 0.36 419 5103
1988 16/6 - 21/6 0.47 566 6398
14/6 - 16/6 0.45 567 14596
1984 29/6 - 30/6 0.37 453 7413
24/7 - 26/7 0.37 443 9185
3.2 Survey of Environment
The land of Ningbo covers with abundant vegetation .The coverage of forest in the area
is 36.8%; the forest storage amounts to 7.35 M3. The forest vegetation belongs to evergreen
broadleaf type. There are about 10 species of plants for national protection Class II, like
ginkgo, Jinqian pine, eucommia, etc., 25 species of Class III national protection plants, likes
Tianzhu laurel and etc. The animal resource is very rich. There are about 950 species of
vertebrates, of which 69 species of beasts, 188 species of birds, 69 species of reptiles, 28
84
Ningbo Jiangdongnanqu WWTP & Sewerage Projectspecies of amphibians, and 502 species of fish. There are 9 species of Class I national
protection animals like pangolin, golden cat, and Yun leopard. And 40 species of Class II
national protection animals, like cowfish, otter. Zibet and etc.
Ningbo is situated in the eastern side of Ningshao Plain with enrichment land, and it is a
natural base for develops agriculture. The agriculture in the area is more advanced in the
country; it has been known, as a land flowing with milk and honey and it is an important
producer of grain, cotton, edible oil and aquatic products in Zhejiang Province and a lot of
local products such as peach, organ waxberry, and Chinese iris.
Due to the interference of already existed human activities in affected area
of the proposed plant, the wild animals are mainly those of small kinds who are
used to the influences of human beings like mouse; these is no wild animals
valuable for conservation.
Birds are mainly of aquatic kind that lives on Fenghua River, the numhers
are very less due to the reason of location is in the urban area.
3.3 Social Environment
3.3.1 Introduction to the city
Ningbo boasts a modern international seaport, a world-famous city of culture and history
and an economical hub of southern Changjiang Delta.Compared with the indictors for the
modern city standard, nearly half of the indicators of the city reach the standard of modern
city. Ningbo port is a rare deep water nature port and it support by the continent in the south
and screen by the Shoeshine islands in the north with characters of small waves, ice-free and
silt-free and superiority water temperature in the port area. As one of the four international
deep-water hinge ports in China, Ningbo port will be a hinge port of Shanghai international
transport center and large-scale ocean container transport center. Ningbo port will be
developed into the largest metal ore transport base, ocean container transport base of China;
the large Oil and liquid chemical industrial, transport and storage base, large scale coal and
bulk cargo transport and storage base, and tourists' attractions in the coastal line of Zhejang
province.
As the important trade port in the east China, and important industrial hase
in Yangtze Rive Delta and coastal regions, the economic position and advantages
85
Ningbo Jiangdongnanqu WWTP & Sewerage Project
of port is being promoted enhanced and extended continually and Ningbo has become
one of the 50 cities leading in the economic development of the nation and one
of the 40 cities with best investment environment in China. The GDP in 2000 was
RMB 117. 575 billion, the gross output value of agriculture was RMB 9.677 billion,
gross industrial output value was RMB60.041 billion (Price of the same year)
3.3.2 Territorial division and population
There are three county level cities and three counties and five districts
under the jurisdiction of Ningbo. The total land area of the city is 9365km2
of which the city proper is 1033km2. The population of the city in 2000 is 5. 4094
million of which, the city proper is 1.2405-million .The population and area
of three old established districts in the city proper is shown on table 3-4:
Table 3-4 Population and area of the established districts (1996)
District District area (km2 ) Population (10000)
Haishu 9.8 24
Jiangdong 16 18Jiangbei 6.9 22
Total 32.7 64
In the urban and township development of Ningbo, the priorities should be given to the
urban modernization, rural urbanization and integration of urban and rural areas and keep the
principles of the region economic planning " to develop port, prosper the urban, expand
three lines and over-all development" . Strengthen the economic relations of the center city
with the economy of surrounding areas and establish regional economic development
structure and new system of towns with the characters of reasonable resources allocation,
industries distribution and complementary of rural and urban superiorities.
3.3.3 Industry
Since the reform and opening to the outside world, Ningbo has been designated as the
key investment and development area by the state and Zhejiang Province and many new and
expansion projects have been built such as Zhenhai Power Plant, Beilun Power Plant, Port of
Ningbo, Zhenhai Refinery Company, Zhejiang Acrylic Fibers Factory, Baoxin Stainless Steel
86
Ningbo Jiangdongnanqu WWTP & Sewerage ProjectPlant, ABS Project and Zhonghua Paper Board Making and etc. A multi-sectors harmonized
industrial system has been come into being initially with light and textile industries.
machinery, petrochemical and power industries as the principle part and electronics, medicine
and pharmacy, metallurgy, building materials and industrial arts etc, as support sectors. In
2000 the industrial value-added has been reached to RMB 30.0570 billion by the
state-owned enterprises and Non-state-owned enterprises with annual sales income above
USD 5 million each .The taxes generated by the state-enterprises and state holding
companies totaled RMB 5.084 billion.
3.3.4 Agriculture
Ningbo is an important base for the production of grain, cotton, oil and aquatic products
in Zhejiang province .A diversity agricultural structure has been formed for a long time i.e.
give priority to planting whilst develop other farming, forestry and aquatic products In 2000
the gross output value of agriculture, forestry, animal husbandry and fishery reached RMB
14.84 billion. The main crops comprise rise (double harvest), cotton, oil plants, vegetable,
bamboo, tea, silkworm, medicinal materials and etc.
The total arable land of Ningbo is 3.54million Chinese mu (of which paddy field, 2.605
million mu, dry land. 935 thousand mu); forestry land is 4.89 million mus, mulberry field, 10.5
thousand mus, tea garden, 190 thousand-mu orchard, 480 thousand mu, and bamboo, 860
thousand mus.
3.3.5 Infrastructure
Since 1993, some new projects such as Dagan, Jiangdong and Meilin water works and
expansion projects like Nanjio Water Works, Jiangdong Water Works have been
completed .Up to 1999, the total water supply capacity reached 880000m3 /d with 7 water
works .See table 3-5 for details:
Table 3-5 Water Supply Capacity of Each Plant
Description Existing designed Water
capacity (m3 /d) sources Scope of water supply
River
Jangdong plant 350000 network in Sanjiangpian, Beilun andZhenhai areas
the E of Yin
87
Ningbo Jiangdongnanqu WWTP & Sewerage Project
. _________________ county
River
network inNanjiao plant 200000 the W of Sanjiangpian
Yin county
. Sanj'iangpian and BeilunMeiling plant 100000 Yao River anea
area
Beilun plant 150000 Reservoir Beilun area
RiverChicheng plant 25000 Ci City
network
Daqian plant 40000 Reservoir Beilun area
Zhenhai plant 15000 Reservoir Zhenhai area
At the same time some large-scale enterprises such as Zhenhai Oil Refinery & Chemical
Company. Zhenhai Power Plant and etc. have built their own self-provided water plants with
better facilities to take water from the sources for their large consumption of water and high
requirements to the reliability of water supply (see table 3-6).
Table 3-6 Large Self-Provided Water Plant Overview
Description Designed capacity Water sources( mr/d
Zhenhai oil refinery & Sanxipo reservoir and Eastern67200 River networks in of Yin
chemical companycounty
Jiaobai reservoir and WesternZhenhai power plant 25000
River networks of Yin County
Zhenhai port area 12000 Sanxipo reservoir
Xinluao reservoir and Qianmuao
Beilun power plant 30000rervi reservoir
Beilun port area 10000 Chengwan reservoir and Rivernetworks
OIl dokoil refinery&Oil dock of oil refinery & 3600 Qianmuao reservoir and River
chemistry company networks
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
The total length of the existing drainpipe line is 870 km of which sewage pipeline is
1140km, service area accounts for 81.22% and the total sewage discharge volume in the urban
area is about 400,000 m3/d, of which domestic sewage is 181thousand m3/d accounting for
45.3%. The city has 34 pump stations, including 19 for sewage, 6 for combined sewage and 9
for rainwater. The volume of the sewage discharged through the pumping stations accounts
for 46% of the total discharge volume of municipal pipeline networks; the rest flows by
gravity into the "three rivers " and inland rivers. Now the city is in a transitional period
from the combined sewage system to separate sewage system. Now the city has only one
sewage treatment plant with capacity of 100,000 m3/d, mainly treating sewage from northem
part of the city along Jiangdongbeilu and Zhongxinglu.
According to the "Urban Master Planning Compendium for the City of Ningbo
(2010-2020), In 2005 the total volume of reused sewage will account for 5% of the total
sewage for centralized treatment, and 20% in 2010, 50% in 2020.The sewage volume of the
central city (Sanjiangpian area, Zhenhaipan area and Beilunpian area) will be 84 t/d, of which
520000 t/d in Sanjiangpian area; in 2010, the sewage volume of the central city will be
1180000t/d, of which, 680000t/d in Sanjiangpian area in 2020, the sewage volume of the
central city will be 1640000t/d,of which 970000 t/d in Sanjiangpian area .According to the
planning ,there will be ten WWTPs in the central city , of which 3 in Sanjiangpian area
(Jiangdongnanqu WWTP, Jiangdongbeiqu WWTP, and Jiangbei WWTP), 1 in Zhenhai ,6 in
Beilun.
The municipal sewage will be collected in different areas for centralized treatment .The
design capacity will be controlled according to long term planning. Primary treatment will
be adopted in the near future and secondary treatment in the long term. The sewage treated
rate in 2005 will be 40%, 50% in 2010, and 70% in 2020.
3.3.6 Public utilities
89
Ningbo Jiangdongnanqu WWTP & Sewerage ProjectNingbo has been a traffic hinge in the east part of Zhejiang province. Since reform and
opening to the outside world of China, the input on the infrastructures has been increased
continually and a modern solid intermodal transport network has come into being.
Port: The port of Ningbo includes three port areas, i.e. Ningbo, Zhenhai and
Beilun .The annual handling capacity of the port is placed second in the mainland of China.
There are 24 berths of 10000 tonnage which includes a 200000 tonnage iron ore berth which
can berth 300000 tonnage ship concurrently, 250000 tonnage crude oil berth, 5 tonnage bulk
liquid chemical special berth and 3 berths can berth the fifth generation containers In 1999
the real throughput of the port was 9660 tons, containers, 601thousand TEU. On Nov. 8, 2000,
the real throughput of the port exceeded 100 million tons becoming the second largest port
with throughput of 100 million tons in China.
Airport: Ningbo Lishe Airport was open to navigation in 1990. There are more than 30
flight courses connect to more than 30 cities, like Beijing, Shanghai, Guangzhou, Shenzhen,
Hongkong and there are over 160 flights each week. The passengers transport volume in 1999
is 534thousand and freight volume is 9 thousand tons. At present, the phase II project for
expansion of the airport has been started up.
Railway: Hangzhou to Ningbo Railway links to the networks of the nation connecting
Jiangxi and Shanghai. In 1999 the passengers transport volume was 2.109 million and good
transport volume was 2.729 million tons.
Highway: A road network with rational overall arrangement and perfect structure has
been coming into being. The external roads: Shanghai-Hangzhou-Ningbo Expressway,
Hangzhou Bay Oversea Bridge, Ningbo - Jinhua First Grade Highway, Coastal National
Trunk Line. etc. Urban network includes speed roads, trunk roads, sub-trunk roads and branch
roads The "One hour traffic area " within the great city area has been established. In 1999
the passengers transport volume was 69.852million and good transport volume was
10, 118million tons.
3.4 Living Standard
Since the reform and opening to the outside world, the living standard of the residents
has been improved and on the way to reach the level of well- to-do life. The farmer' s living
standard is still in the level of dressing warmly and eating one' s fill and the infrastructure
are still lag behind. Based on survey in 1998 the disposal income the residents in the urban
90
Ningbo Jiangdongnanqu WWTP & Sewerage Projectarea was RMB 891land actual expend was RMB 9371 of which, consume expenses was
RMB 7111, food RMB 2961; Non-consume expenses was RMB 2259. Food consumption
accounts for 38% of the total consume expenses. From this point of view, the living standard
of the residents in Ningbo has already entered into the level of well to do.
The city of Ningbo has a sound sanitation management system and sanitation workers.
All the domestic garbage will be collected and 90% to be treated into harmless. Fenlin
Garbage Incineration has been built; Tap water has been used all over the city.
The sources of drinking water of Ningbo mainly are Yuyao River, Dongqian Lake,
which conform to the standard of Class II of surface water quality. The existing water plants
include Meilin Water Plant, Jiangdong Water Plant and Nanjao Water Plant.
Ningbo is a city with long history and famous culture heritage. It has the ancient library
with the longest history in China; Hemudu (Hemudu Cultural Relics), date back 7000 years
old; Baoguosi (Baoguo Temple), the oldest wooden structure construction of South of China,
and it also has the ancient celadon ware kiln in Shanglin Lake, Tashan Weir Irrigation Works
in ancient China, scenic spots in Xikou, Fenghua, Tiantong and Eryuwang Temples in the
ancient time and etc., There are now 40 hotels for international tourists, of which 17 star
hotels. In 1996 the reception of international tourists was 180877person /day and the tourism
foreign exchange revenue was USD 28.98 million.
3.5 Current Environmental Status
3.5.1 Water environment status
3.5.1.1 Assessment Method
Single factor standard index method is adopted for the evaluation. The following is the
details :
(1) The standard index of the single water quality evaluation factor I in J sampling
point.
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
Szj Cij/ C'j------------------------------------------------ (Formula 3-1)
In formula 3-1:
C-j-------The concentration of water quality evaluation factor I in j sampling point
mg/I;
C-j-------Evaluation standard of factor, mg/l;
(2)The standard index of DO:
_ DO, - DO, nl DOf -DOs DOj§DOs--------------------------- (formula 3-2)DOf-DOS
DO]
SDO j= 10-9 DOs DOj<DOs--------------------------- (formula 3-3)
DOf=468/ (31.6+T) ----------------------------------- (Formula 3-4)
In formula of 3-2, 3-3, 3-4:
DOf----concentration of saturation dissolved oxygen, mg/I:
DO,----Evaluation standard of dissolved oxygen , mg/I;
D01----concentration of dissolved oxygen in j sampling point , mg/I:
T------Water temperature, 'C.
(3)Standard index of PH:
7.0 - pHj
SPH, j 7.0- PH1 d PHj 7.0-------------------------------(Formula 3-5)
pHi -7.0
SPH,j pH S,, - 7. 0 PHJ>7.0------------------------------- (Formula 3-6)
A In formula 3-5, 3-6 'tP:
PHj------Ph value in sampling point
PH,d-----lower limit in evaluation standard
PH..--...up limit of evaluation standard .
3.5.1.2 Water Quality of Yong River and Fenghua River
Yong River water system composes Yong trunk stream, the two first grade branches of
Yao River and Fenghua River, of which Fanhau River is the receiving water body of
Jiangdongnaqu WWTP. There are many normal monitoring stations in Yong River water
system and the sections under monitoring have a total length of 216.5km. There are abundant
92
Ningbo Jiangdongnanqu WWTP & Sewerage Projectmonitoring data on water quality. Therefore, the EA will use the monitoring results in five
stations i.e. Fanshiliu section, and Zhenlangyan section of Fenghua River and Sanjiangkou
section of Yong River in the most recent 5 years for analysis instead of carrying out new
monitoring on Yong River and Fenghua River. See attached drawing 1 for the monitoring
points.
The standard of evaluation is "Surface Water Environment Quality
Standard" GB3838-2002 (the quality control target of the section of Fanshidu is Class III;
other four sections are Class IV) the evaluation method of single factor standard index is
adopted .See table 3-7 and 3-11 for the results.
Table 3-7 Yong River and Fenghua River Water Quality in 1997
Disso Ammo Volatile H
Secti Ived COD BD5O nia hydrox- Cyani Hg Pb Cd As vale Oilon Item PH oxyg M,< mg/ nitroge ybenze- de 1 I p g/L nt mg/L
en mg/L L n ne mg/L g/L g/L g/L CrpMg/L mg/L mggL
Samples 24 24 24 24 24 8 8 8 8 8 8 8 18
Max. Value 7.3 8.55 6.20 3.0 1.47 <0.002 <0.00 <0. <5. <0. <7 <4 0.26__________ 4 5 ___ ___ 4 05 0 50 < 4 02
Minimum 6.5 5 2.2 2.77 6 0.34 <0.002 <0.00 <0. <5. <0. <7 <4 <0.05value 9 6 4 05 0 50 < 4 <05
Mean value 7.0 7.01 4.10 1.9 0.84 <0.002 <0.00 <0. <5. <0. <7 <4 0.067.01 4 05 0 50____
Classificatiota n oan of mean / 11 _ _ _ _ _ _ It
valueStandard 0 0.68 04 0.84 1.2
index 8Max timesfor exceed 0 / 0.03 0 0.47 0 0 0 0 0 0 0 4.2standard x
Samples 24 24 24 24 24 8 8 8 8 8 8 8 18
Max. 744 7.63 6.59 5.0 1.67 <0.002 <4°° <0. 0 < s6. <7 <4 0.22
Minimum 6.7 1.30 4 15 1.5 0.37 <0.002 <0.00 <0. <5. <0 <7 <4 0.089 8 ~~~037 <.02 4 5 0 so<5< 00
5 ~~~~~7.1 2.6 <0.00 <0. <5. <0.= Mean value 5 32 5 60 1.23 <0.002 4<O 0 50 <7 <4 0.13804c 4 4 . . 5 _ _ _ _ _
- Classificatio5 n of mean I III 11 I IV I I _ I I TV
u value
Standard 0.0 0.56 0.4 0.82 0.276index 7 4 .608 .7
Max timesfor exceed / 0 0 0.11 0 0 0 0 0 0 0 0standard x
93
Ningbo Jiangdongnanqu WWTP & Sewerage Project
Samples 24 24 24 24 24 8 8 8 8 8 8 8 18
Max value. 7.6 7.62 4.53 6 3.99 0.0003 <0400 <0. <5. <0 9 <4 0.4400 6 4__ _ _ _ _ _
Mivnailmuem 67 2.18 2.68 0.7 0.97 <0.002 <040 <0. <5. <0. <7 <4 0.100value 4 ____8 4__ ___ ___ __ _ __ _ _
Mean value 7.2 4.45 3.56 2.6 2.00 0.002 <0400 <0. <5. <0. 4 <4 0.2233 _ _3 4_ _ _ 5
Classificatio xcen of mean IV ll I Exceed I I I _ _ I I IV
value ___
ew Stiandard 0.1 .762 0.356 .4 2.000 0.200 / / / 0.0 / 0.446.e index 53 38 -. 40
Max timesF for exceed 0 / 0 0 2.990 0 0 0 0 0 0 0 0
standard xSamples 24 24 24 24 24 8 8 8 8 8 8 8 18
Max. 7.9 8.89 3.64 2.3 1.62 <0.002 <047 <0. <5. <0. <7 <4 0.2703 7 4_ _ _ _ _ _ _ _
Minimum 7.2 2.77 1.34 0.3 0.90 <0.002 <0.00 <0. <5. <0. <7 <4 <0.050___________ 3 0 04 05 0 50 _ _ _ _ _ _
Mean value A 5.88 2.84 1.2 1.24 <0.002 <4°° <0. 0 < 50< <7 <4 0.109___________ 4 74 5 0 0
Classification of mean I III Il I V I I I I I I I IV
valueII IIStandard 0.3 0.2
i Standexd 60 0.528 0.284 1.240 _ I / I I 0.218ine 6012
-i1a Max timesfor exceed 0 I 0 0 0.620 0 0 0 0 0 0 0 0
N standard x____
Samples 24 24 24 24 24 8 8 8 8 8 8 8 18
Max. 7.9 10.02 2.25 2.8 1.17 <0.002 <0400 <o0 <05 <0 <7 <4 0.1309 34 5 0 0
Minimum 7.2 2.65 0.64 0.4 0.38 <0.002 <0.00 <0. <5. <0. <7 <4 <0.0509 ___ 6 4 05 0 50
Mean value S 6.67 1.52 1.1 0.69 <0.002 <0400 <0. <5. <0 <7 <4 0.061
Classification of mean I II I I IV I I I I I I I IV
value___Standard 0.4 0.1
Siannddeax d 53 0.398 0.152 98 0.690 / _ _ - 0.122
Max timesfor exceed I / 0 0 0.170 0 0 0 0 0 0 0 0standard x
As shown in table 3-6 the section of Fanshidu of Fenghau River meets the standard of
Class IV water body set in "Surface Water Environment Quality Standard" . GB3838-2002
The main pollutant is oil with max exceeding times of 4.2 The section of Chenglangyan
conforms to Class IV water quality; section of Sanjiangkou is above Class V water body and
the main pollutant is ammonia nitrogen with max exceeding times of 1.24;the section of
Youshan conforms to Class IV water quality. There are no heavy metals exceeding the
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
standards.
The analysis shows that the most serious pollution section is Sanjiangkou, the next is
Zhangjiangan.
Table 3-8 Water Quality of Yong River and Fenghua River in 1998
Non.No volatDiss -ionif ile Hexa
Sect olve COD BO c hydr Cyan Hg Pb Cd As valenSect Item pH o M,y D5 amIde U U U t Cr
en mg/L ium benz mg/L g/L g/L g/L g/L I
mg/ mg/ e-ne g/LL L mg_L
Samples 24 24 24 24 24 8 8 8 8 8 8 8
Max. 774 7.83 6.17 368 0.01 <0.0 <0.00 <0. <5. <0. <7 <47 6 8 02 4 05 0 50 __
Minimum 6.8 3.28 3.50 1.0 0.00 <0.0 <0.00 <0. <5. <0. <7 <42 8 2 02 4 05 0 50
Mean value 7.1 2.2 0.00 <0.0 <0.00 <0. <5. <0.n C siMean value 8 5.29 4.43 0 8 02 4 05 0 50 <7 <4
e Classificatio __n of mean / 111 111 _ I _ _ I _ _ _
valueStandard 0.0 0.74 0.5
index 9 I .4I I I Max timesfor exceed 0 / 0 0 / 0 0 0 0 0 0 0standard xSamples 24 24 24 24 24 8 8 8 8 8 8 8
Max. 7.5 4.54 7.32 9.1 0.04 <0.0 <0.00 <0. <5. <0. <7 <47 3 9 02 4 05 0 50 ______
Minimum 6.8 0.50 5.07 2.2 0.00 <0.0 <0.00 <0. <5. <0. <7 <47 8 2 02 4 05 0 50 ___
~ Mean value 1.94 6.7 95.4 0.02 <0.0 <0.00 <0. <5. <0. <7___________ I I 1 02 4 05 0 50_ _ _
Classificatio Excen of mean / ed IV IV I I I I I I I
value V
Stiandard 0.1 0.64 0.9index 6 I .4 0 / / / " "
Max timesfor exceed 0 / 0 0 0 0 0 0 0 0 0standard xSamples 24 24 24 24 24 8 8 8 8 8 8 8
Max. 8.3 4.65 7. 10 0.06 <0.0 <0.00 <0. <5. <0 8 <40 ___96 6 02 4 05 0 50 8 <
0 ~~~7.0 1.9 0.00 <0.0 <0.00 <0. <5. <0.Minimum 0.48 3.88 4 8 02 4 00 < 5 0 <7 <4
7 6 4.9 0.03 <0.0 <0.00 <0. <5. <0.Mean value 1.76 5.19 4 <41 5 3 02 4 05 0 50 __
Classificatio Excenofmean / ed V III IV I I I I I I I
value
95
Ningbo Jiangdongnanqu WWTP & Sewerage Project
Standard 0.4 1.20 0.8 0 0 0 0 0 0.0index 07 3 0.519 25 / 40 /
Max times 0.8for exceed 0 / 0 27 0 0 0 0 0 0 0standard x _Samples 24 24 24 24 24 8 8 8 8 8 8 8
Max. 8.3 8.84 4.65 8.4 0.07 <0.0 <0.00 <0. <5. <0. <7 <46 1 8 02 4 05 0 50 < <
Minimum 1 1.65 1.31 0.5 0.04 <0.0 <0.00 <0. <5. <0. <7 <48 5 1 02 4 05 0 50
7.7 3 2.9 0.03 <0.0 <0.00 <0. <5. <0. <Mean value 4.91 3.00<7 4
5 3 3 02 4 05 0 50
:B Classificatio= n of mean T IV II II / I I I I I I I
N valueStandard 0.5 0.68 0.4index 00 7 0.300 88 I / / I / / I /
Max times 1.94 0 4for exceed 0 79 0 0 20 0 0 0 0 0 0standard x
v 24 24 24 24 24 8 8 8 8 8 8 8
Max. 8.0 8.95 3.87 3.8 0.05 <0.0 <0.00 <5. <0. <7 <48 3 0 02 4 05 0 50
Minimum 7.3 3.15 0.28 0.2 0.00 <0.0 <0.00 <0. <5. <0. <7 <49 1 3 5 02 4 05 0 50
c Mean value 7.7 8.48 2.15 1.4 0.01 <0.0 <0.00 <0. <5. <0. <7 <49 8 9 02 4 05 0 50
v Classificatioo n of mean / I iI I I I l I I I l l
value _ ____
Standard 0.5 0.10 0.2index 27 2 0.215 47 I l l l I I l I
Max times 1.98for exceed 0 3 0 0 / 0 0 0 0 0 0 0standard x
As the table shown that in 1998 the water quality of the section of Fanshidu of
Fenghua River conforms to Class III set in "Surface Water Environment Quality
Standard" GB3838-2002 ; the sections of Chenglangyan and Sanjiangkou exceed Class V
water body standard and the main pollutant is dissolved oxygen ;the sections of Zhangjiangan
and Youshan conform to the water standard of IV and the section of Youshan reaches the
standard of Class II .GB3838-2002 .0 No heavy metals exceed the standards The analysis
shows that the water pollution is more serious in the sections of Sanjiankou and
Chenglangyan. As the flow passes the Sanjiangkou to Zhangjiangan, with the reduction of
pollutants discharge and the self cleaning of the water body, the water quality is turning better
and the water quality reaches Class II as it reach the seaport of Youshan for the stronger
dilution ability.
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
Table 3-9 Yong River and Fenghua River water Quality in 1999
AmC mon
(U ~~~~~~~~~~ia SexavMonito DO BOD COD n Total. Pb Cd As alent Cyani
* ~~~~~~~~~BD irHg A ln.E ring pH mg/ Oil P p.pg/ p Cr de
° Dilate L mg/L mgL o mg/L L L g/ / dn pg/L~~~~~~~~i/
mgl
Level 7.06 5.54 0.163 2.88 3.85 1.22 0.134 / /
period __
Pollutio 0.03 3.26 0.72 0.65 1.22 0.67 / / / /n indexClassi fication
of I III IV I 11 IV III / / / /water
quality _Times
forexceed 0 2.26 0 0 0.22 0 I I / /standar
d
Wet 6.87 4.24 0.100 1.35 3.47 1.12 0.069season
Pollutio 0.13 2.00 0.34 0.58 1.12 0.35 /n indexClassificationwaterlof IV IV I 11 IV II l I I lwater
5~qualityTimes
forexceed 0 1 0 0 0.12 0 / I I /standar
d
seaso 7.35 7.54 0.093 1.64 4.56 0.28 0.172 <0.05 2.1 0.16 <7 <4 <0.004season
Pollutio 0.18 1.86 0.41 0.77 0.28 0.86 <0.00 0.04 0.03 <0.04 <0.08 0n index Classification
of / I IV I III II III I I I Iwater
qualityTimes
forexceed 0 0.86 0 0 0 0 0 0 0 0 0 0standar
Annualmean 7.09 5.77 0.119 1.96 3.96 0.87 0.125value
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Ningbo Jiangdongnanqu WWTP & Sewerage Project
Classification
of / III IV I II III IIIwater
qualityLevel 7.26 0.89 0.365 4.68 6.44 1.82 0.333 / / /period I I I_I_I
Pollutio 0.13 0.73 0.78 0.64 1.21 1.11 / / I / / /n indexClassification Exce
of I ed Ill III N V / I / / / /
water Vqualitytimes
forexceed 0 0 0 0 0.21 0.11 / I I / / /standar
Wet 7.06 1.77 0.178 3.81 5.21 0.77 0.127seasonPollutio 0 03 0.356 0.64 0.52 0.51 0.42n indexClassification Exce
of / ed IV III ill III ill I I I / / /water V
quality__ _ _ __ _ _ _ _ __ _ _ _
: Timesfor
51J exceed 0 0 0 0 0 0 I I / / / /standar
d_ _
Dry 7.73 2.38 0.385 8.47 6.28 0.91 0.320 <0.05 1.9 0.14 <7 <4 <0.004season
Pollutio 0.37 0.77 1.41 0.63 0.61 1.07 <0.05 0.04 0.03 <0.07 <0.08 0n IndexClassification
of / V IV V N III V I I I I I Iwater
qualityTimes
forexceed 0 0 0.41 0 0 0.07 0 0 0 0 0 0standar
Annualmean 7.35 1.68 0.309 5.65 5.98 1.17 0.260value _
Classification Exce IV In i IV
of ed [ V A l VEwater
quality _
pLevel 7.13 3.78 0.247 3.51 5.68 1.50 0.191 I / /. period I I 9
98
Ningbo Jiangdongnanqu WWTP & Sewerage Project
Polluino 0.07 0494 0.585 0 568 1.00 0 637n indexClassification
of I IV IV III III IV II1waterqualityTimes
forexceed 0 0 0 0 0 0standar
Wet 7.19 2.49 0.208 4.10 4.79 1.86 0.192season
Pollutio 0.10 2.49 0.416 0.683 0.479 1.24 0.640n indexClassification
of I V IV IV III V IIIwater
qualityTimes
forexceed 0 0 0 0 0.24 0standar
d
Dry 7.62 3.42 0.245 8.10 6.68 1.07 0.342 <0.05 1.5 0.10 <7 <4 <0.004season
Pollutio 0.32 3.42 0.490 1.350 0.668 0.71 1.14 0.005 0.03 0.02 <0.07 <0.08 0n Index-Classification
of 12 Li Li 32 ,1 12 1O Li [ [2warderqualityTimes
forexceed 0 0 0.35 0 0 0.14 0 0 0 0 0 0standar
Annualmean 7.31 3.23 0.23 5.24 5.72 1.48 0.24value
Classification
of I ] [ [l 2 [2 [water
____ quality I___ __ _ _ __ __ _ __ _ __ _ _ __99 I I
99
Ningbo Jiangdongnanqu WWTP & Sewerage Project
Continuation Yong River and Fenghua River Water Quality 1999
Ammon
season~~~~~~~~~~~~~~a ea
Monito DO COD Tota Pbedxav nOil BOD 5 nitr Tota. Pb Cdg As alent yn
ringy pH mg/ M H ig/ pg deDate L ~~~~mg/L mgIL Mn oge [ g C
Date L ~~~~mg/L mgIL jgI L L pg/L Cn pigfL
0 ~~~~~~~~~~~mg/
Levelperiod 7.62 5.96 0.182 0.63 2.48 0.87 0.108
Pollutio n 0.31 0.364 0.105 0.250 0.58 0.360
index__ __
Classification
of I II IV I 11 III IIIwater
quality __ _ _ _ _ _ _ _ _ _
Tinmesfor
exceed 0 0 0 0 0 0standar
Wet 7.45 4.11 0.158 2.01 2.05 1.42 0.111seasonPolluti
on 0.23 4.11 0.316 0.335 0.021 0.95 0.370index
Classification
of I RI IV I 11 IV III- water
qualityTimes
forexceed 0 0 0 0 0 0
standar
Dry 7.99 5.80 0.212 5.48 2.57 0.76 0.279 <0.05 0.9 0.06 <7 <4 <0.004seasonPolluti 0.00
on 0.50 5.80 0.424 0.913 0.026 0.51 0.930 0.05 2 0.01 <0.07 <0.08 0
index2Classification
of I III IV IV II III IV I I I IwaterqualityTimesfor
exceed 0 0 0 0 0 0 0 0 0 0 0 0
standar
100
Ningbo Jiangdongnanqu WWTP & Sewerage Project
Annualmean 7.69 5.29 0.18 2.71 2.37 1.02 0.17value
Classification
of Ii water
quality _
Level 7.86 7.94 0.121 0.59 1.91 0.43 0.064period _ _ __ _ _
Polluti 0.28on 0.43 7.94 0.242 0.098 0.019 7 0.213
indexClassification
of I I -
waterq ualitvTimes
forexceed 0 0 0 0 0 0standar
dWet 7.64 6.13 0.620 0.61 1.84 0.53 0.055
seasonPol luti 03
on 0.32 6.13 1.240 0.102 0.018 0.35 0.183index3
Classification
of I -
waterqualitv ___Times
forexceed 0 0 0 0 0 0stand ar
dDry 7.99 7.77 0.133 1.08 1.40 0.38 0.043 <0.05 1.1 0.14 <7 <4 <0.004
seasonPolluti 02 0.00 0.02
on 0.50 7.77 0.266 0.180 0.014 0.25 0.143 <0.05 2 8 <0.07 <0.08 0index __ __
Classification
of 7 C G _ _ bwaterquality _
Time
etxceed 0 0 0 0 0 0 0 0 0 0 0 0standar__
Annualmean 7.83 7.28 0.29 0.76 1.72 0.45 0.05value
101
Ningbo Jiangdongnanqu WWTP & Sewerage Project
Classification
of / I I -
water_ _ _ q u a lity _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
102
Ningbo Jiangdongnanqu WWTP & Sewage Project
As table shown that in 1999, the section of Fanshidu of Fenghua River was Class
IV water quality set iC GBC8C8-2002; the maiC over staCdard poGGutaCt is oiG aCd the
water quaGity reached BGass IV staCdard iC GeveG, wet, aCd dry periods. fCd DO aCd
ammoCia CitrogeC GeveG aGso reached BGass IV staCdards iC GeveG aCd wet periods. The
sectioC oD BheCgGaCgyaC is the water body oD BGass V aCd maiC exceediCg staCdard
poGGutaCt is DOING aCd BOD5reacded the staCdard oD BGass V iC dry seasoC. This shows
that the water quaGity oD FeCghua River exceeded the staCdards iC diDDereCt degrees.
The quaGity oD YoCg River coCDorms to BGass IV oD GBC8C8-2002 staCdards iC geCeraG
but dissoGved oxygeC oD SaCjiaCgkou iC dry seasoC was iC BGass V aCd oiG iC YoushaC
sectioC is iC BGass V iC wet seasoC.
No heavy metals exceed the standards.
Table Yong River and Fenghua River Water Quality 2000
AmmMonito DO BOD COD onia SexavCyn
M nito Oil cal Total Hg Pb Cd As alent Cyani-5 ring pH mg/ 5 Mi, L deDt Lc mg/L nitro P ig/L yig/L ag/L l.ig L CrDate L ~~mg/L mgIL gen mgL L/
___ _____ ~~~~~~mg/L _ ___ _
LevelNo No No No No No
period 7.16 5.95 0.095 2.49 4.59 0.654 0.145 No No No No No NojtW] _ ~~~~~~~~~~~result result result result result result
Polluti No No No No No Noon 0.08 1.9 0.62 0.77 0.654 0.73 result result result result result result
index
Clagsification / I IV I III III III I I I I I 1
ofwater
qualityc Times
forexceed 0 0.9 0 0 0 0 0 0 0 0 0 0L1~standar
dWet 74 30400321 576 118020 No No No No No No
season 7.44 3.04 0.093 2.12 5.76 1.108 0.210 result result result result result resultPolluti No No No No No No
on 0.22 1.86 0.53 0.97 1.108 1.05 result result result result result resultindex ___
Classification
of / IV IV I III IV IV I I I I I Iwater
quality _
103
Ningbo Jiangdongnanqu WWTP & Sewage Project
Timesfor
exceed 0 0.86 0 0 0.108 0.05 0 0 0 0 0 0
standard
Dry 6.98 7.51 0.114 2.22 6.37 0.865 0.150 0.02 1.13 0.11 4 2 2
seasonPolluti
on 0.02 2.28 0.56 1.07 0.865 0.75 0.002 0.02 0.02 0.02 0.04 0.001index __ _ _ _ _
Classification
of I T IV I IV I III I I I I I
waterquality__ _ __ _ _ _ _ _
Timesfor
exceed 0 1.28 0 0.07 0 0 0 0 0 0 0 0standar
Annualmean 7.19 5.50 0.100 2.28 5.57 0.876 0.168value
Classification
of / III TV I Ii 111 IIIwater
_ quality I_I
Level 7.73 3.46 0.278 6.26 7.66 1.066 0.320 No No No No No No
period result result result result result result
Polluti No No No No No No
on 0.47 0.556 1.04 0.77 0.71 1.07 ru ru ru ru ru ru
index result result result result result result
Classification
of I IV IV V IV IV V I I I I I I
waterqUalitx'_____Times
forexceed 0 0 0.04 0 0 0.07 0 0 0 0 0 0standar
dWet 77 354029 46 760 261030 No No No No No Nosea 7.73 3.54 0.279 4.65 7.60 2.651 0.390 result result result result result result
Polluti No No No No No No
on 0.47 0.558 0.78 0.76 1.77 1.30 result result result result result resultindex
Class ification Exce
of I IV IV IN. 1\V ed V I I I I I Iwater
quality
104
Ningbo Jiangdongnanqu WWTP & Sewage ProjectTimes
forexceed 0 0 0 0 0.77 0.30 0 0 0 0 0 0standar
dDry 7.44 4.57 0.258 6.76 8.78 1.349 0.163 0.02 1.5 0.13 4 2 2
seasonPolluti
on 0.22 0.516 1.13 0.88 0.90 0.54 0.02 0.03 0.03 0.04 0.08 0.001Index
Classification
of / IV I V IV III I I I I 1 Iwater
quality___Times
forexceed 0 0 0.13 0 0 0 0 0 0 0 0 0standar
dAnnualmean 7.63 3.86 0.272 5.89 8.01 1.69 0.291value
C lassification
of I V IV/ IV/ IV V RIwater
__ _ quality__ ___ __ _ _ _
Level 7.72 3.54 0.410 5.57 6.73 1.779 0.413 No No No No No Noperiod 7 01 5 result result result result result resultPolluti No No No No No No
on 0.36 3.54 0.820 0.928 0.673 1.186 1.37 result result result result result resultindex
Classification
of I IV IV IV IV V V I I I 1 1 Iwater
qualityTimes
forexceed 0 0 0 0 0.186 0.37standar
V) dWet 7.59 3.26 0.412 3.83 4.41 1.606 0.378 No No No No No No
seOalslo7n . 3 result result result result result result
Polluti No No No No No Noon 0.29 3.26 0.824 0.766 0.441 1.071 1.260 result result result result result result
indexClassification
of I TV Al III III V V I I I I I Iwater
quality
105
Ningbo Jiangdongnanqu WWTP & Sewage Project
Timesfor
exceed 0 0 0 0 0.071 0.26 0 0 0 0 0 0
standar
Dry 7.67 3.54 0,435 4 97 7.76 1.22 0.225 0. 02 1 0.05 4 2 2seasonPolluti
on 0.34 3.54 0.870 0.828 0.776 0.813 0.750 0.02 0.02 0.01 0.04 0.04 0.01
indexClassification
of I IV 1 1I III rv IV iV I IIwaterquality__ _ _ _ _ _
0 _ 0 0 0 0 0 0 0 0 0 0 0
Annualmean 7.66 3.45 0.42 4.79 6.30 1.54 0.34value
Classification
of / IV IV I IVI V Vwater
quality
106
Ningbo Jiangdongnanqu WWTP & Sewage Project
Continuation Yong River and Fenghuanjiang River Water Quality 2000MO ~~~~~~~~~Amm Sexav
o r° Monito DO BOD COD iacal Total Hg Pb cd As alent Cvani21 CI ~~~~~OilHg P cd A aln _ _ ring pH mg/ 5 MiL nitro P Lg/I deC n Date L m/.mg/I. mg/I. gen mgIL ~ i/L pg /g/ C
mgL _ _ _pg/I.
Level 7. .9018 14 .6 078003 No No No No No Noperiod 7.9 6.99 0.128 1.45 156 0.738 0.063 result result result result result resultPollutiNo N No N No o
ondett 0.45 6.99 0.256 0.242 0.016 0.492 0.210 result result result result result resultindex
Classification
of B El E I 3 .1l B7 LiwaterqualityTimes
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dWet 77 424012 18 249 083005 No No No No No No
season 7.76 4.24 0.102 1.87 2.49 0.883 0.045 result result result result result resultPolluti ~~~ ~~~ ~~~ ~~~~~~~No No No No No No
:< on 0.38 4.24 0.204 0.312 0.025 0.589 0.150 result result result result result result.2 index
= Classification
N of E,B B El B B7 B B I
water
quality _
Timesfor
exceed 0 0 0 0 0 0 0 0 0 0 0 0standar
Dry 8.14 8.46 0.094 1.52 1.87 0.734 0.101 0.02 1 0.05 4 2 2seasonPolluti
on 0.57 8.46 0.188 0.253 0.019 0.489 0.337 0.02 0.002 0.01 0.04 0.04 0.01index _ _ _ _ _ _
Classification
of B Bl _1 B- B B0 ] B- B1 LI B] water
q uality _ _ _ _ __ _ __ _ __ _ __ _ __ _ __ _ _ _ __ _ __ _ __ _ ___107
107
Ningbo Jiangdongnanqu WWTP & Sewage ProjectTimes
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
Annualmean 7.93 6.56 0.11 1.61 1.97 0.79 0.07value
Classification
of / 11 i I I 111 11water
quality _ .
Level 7.99 9.59 0.049 1.17 0.71 0.415 0.026 No No No No No Noperiod result result result result result resultPolluti No No No No No No
on 0.50 9.59 0.098 0.195 0.041 0.277 0.086 result result result result result resultindex
Classification
of _ I . 1 -1 '' .water
qualityTimes
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dWet 79 571009 05 091 04800 No No No No No No
seaston 7.91 5.71 0.059 0.52 0.91 0.428 0.015 result result result result result resultPol lut i No No No No No No- on 0.46 5.71 0.118 0.087 0.091 0.285 0.050 ru ru ru ru ru ru
index ~~~~~~~~~~~~~~~result result result result result resultindexClassification
of - 7 i 7 7 I watter
qualit _ _. __l r___
Timesfor
exceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dDry 8.17 8.63 0.052 0.95 1.30 0.58 0.061 0.02 1 0.05 4 2 2
seasonPolluti
on 0.59 8.63 0.104 0.158 0.130 0.387 0.203 0.02 0.002 0.01 0.04 0.04 0.01index
Classification
of i Ii l l ; ! [- l l C b 3 33water
quality
108
Ningbo Jiangdongnanqu WWTP & Sewage ProjectTimes
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dAnnualmean 8.02 7.98 0.05 0.88 0.97 0.47 0.03value
Classification
of I lI I I 1 1water
quality I _ I _I _ I I
109
Ningbo Jiangdongnanqu WWTP & Sewage Project
As table 3-9 shown that the water quality in the section of Fanshidu of Fenghua
River reaches Class IV GB 3838-2002. The main pollutant exceeded is oil. The water
quality reaches Class TV in level, wet and dry seasons. ln addition. COC mn reaches
Class IV in dry season and ammonia nitrogen and total P reaches Class TV in wet season.
The section of Chenglangyan is Class V water body and the main pollutant exceeded
is ammonia nitrogen, which exceeds Class V water body in wet season. This indicates
that the water quality of Fenghua River in 2000 exceeded the standard in general.
The water quality of Yong River in the section of Sanjiangkou is Class \V water body
GB 3838-2002; the main pollutants exceeded are ammonia nitrogen and total P, and in
level and wet seasons reached Class V standard .The water quality in the sections
of Zhangjiangan and Youshan conforms to the requirements of Class TV GB3838-2002 and
indicators exceeded in each water seasons.
Table Yong River and Fengh ujian g River Water Qu lity 2001Amm
Monito DO BOD COD al Total Sexav Cyaniring pH mc! Ol alHg Pb Cd As alent dt Date pH mL mg/L 5 nitro mg/L ~ ig/L ug/L l-ig/L Cr de
Date ~ ~ ~ moL m - m/L mgIL pigfLgen lI~~~~~~~~~g/L
Level 7.07 4.52 0.04 2.59 4.5 0.658 0.193 No No No No No Noperiod result result result result result resultPolluti No No No No No No
on 0.04 0.8 0.65 0.75 0.658 0.97 result result result result result resultindex _ _ _ _ _ _ _ _ _
Classification
of I 1V I I III Ill III I I I I I Iwvater
quality _ _ _ _ _ _
Timesfor
exceed 0 0 0 0 0 0 0 0 0 0 0 0standar
d _
Wet 69 37401625 413048027 No No No No No Noseason 6.93 3.74 0.136 2.52 4.13 0.438 0.217 result result result result result resultPolluti No No No No No No
on 0.07 2.72 0.63 0.68 0.438 1.09 result result result result result resultindex
Classification
of / IV TV I III 11 IV I I I I I Iwater
quality
110
Ningbo Jiangdongnanqu WWTP & Sewage Project
Timesfor
exceed 0 1.72 0 0 0 0.09 0 0 0 0 0 0standar
dDry 7.11 5.41 0.153 2.11 3.38 0.509 0.235 0.02 1.75 0.05 4 2 2
seasonPolluti
on 0.06 3.06 0.53 0.57 0.509 1.18 0.002 0.04 0.01 0.02 0.04 0.001index
Classification
of I I1I IV I II III IV I I I I I IwaterqualityTimes
forexceed 0 2.06 0 0 0 0.18 0 0 0 0 0 0standar
Annualmean 7.04 4.56 0.110 2.41 4.00 0.535 0.215value
Classification
of IV Rl I l 111 IVwater
- qualityLevel 7.65 3.45 0.073 S.S0 7.00 0.986 0.246 No No No No No Noperiod result result result result result resultPollutiNo N No N No o
on 0.33 0.146 0.92 0.70 0.66 0.82 reNsult reNsuolt reNsult reNsuolt reNsuolt reNsuoltindex _
Classification
of IV 1 \/ I\V I\ III 1\I I I I I I Iwater
qualityTimes
for- exceed 0 0 0 0 0 0 0 0 0 0 0 0
standard _
Wet 71 333026 48 573 100020 No No No No No Nosealson 7.17 3.33 0.286 4.89 5.73 1.000 0.210 result result result result result resultPollutiNo N No N No o
index 0.09 0.572 0.82 057 067 070 result result result result result result
Classification
of I \/ Al TV III III IV I I I I I Iwater
quality
Ningbo Jiangdongnanqu WWTP & Sewage Project
Timesfor
exceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dDry 7.72 3.43 0.195 4.32 4.76 0.928 0.161 0.02 1.13 0.05 4 2 2
seasonPolluti
on 0.36 0.390 0.72 0.48 0.62 0.54 0.02 0.02 0.01 0.04 0.04 0.001index
Classi fication
of I R' IV I \ II III IlI I I I Iwvater
qualityTimes
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
Annualmean 7.51 3.40 0.185 4.90 5.83 0.971 0.206value
Classification
of R; IV IV III 111 I'Vwater
quality
Level 7.66 3.26 0.302 3.52 5.92 1.083 0.195 No No No No No Noperiod .__ ___ ___ ___ ___ result result result result result result
112
Ningbo Jiangdongnanqu WWTP & Sewage Project
Polluti No No No No No Noon 0.33 3 26 0.604 0.587 0.592 0.722 0.650 result result result result result result
indexClassification
of O .O O C 7 7 7 r water
quality _ _ __ _ _ _ _ _ _ _ _
Timesfor
exceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dwet
season 7.23 3.38 0.342 3.75 5.48 1.178 0.139 No No No No No NoscMseen 7.93 3.38 0 342 375 5 48 i 17R 0 i 39 result result result result result result
Polluti No No No No No Noon 0.12 3.38 0.684 0.625 0.548 0.785 0.463 result result result result result result
index
Classification
of 7z ;7 7 _ 1 7 7 7 ;.water
quality__ _ _ _ _ _ __ _ _ _ _ _
timesfor
exceed 0 0 0 0 0 0 0 0 0 0 0 0standar
Dry 7.47 3.41 0.150 3.9 4.37 1.032 0.130 0.02 1.44 0.05 4 2 2seasonPolluti
on 0.24 3.41 0.300 0.650 0.437 0.688 0.433 0.02 0.029 0.01 0.04 0.04 0.01index
Classification
of 7 7 -E 7 7 7water
qualityTimes
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dAnnualmean 7.45 3.35 0.26 3.72 5.26 1.10 0.15value
Classification
of / 7 E O C1 E lwater
quality I_____
113
Ningbo Jiangdongnanqu WWTP & Sewace Project
Continuation Yon River and Fenghua River Water Quality 2001Amm
Monito DO BOD COD ona TotalSea Cyani~~ ring PH m~~I oil al Hg, Pb Cd As alent d~~ Date ~~~~p mg/L nir L pg/L j.g/L [ig/L pig/L CrDat L mgL mc tL genX mg/ p g/ F
_en_ _ ~~~~~~mo/L_
*~~~ Level No No No No ~~~~~~~~~~~~~~~~~ No NoLevl 776 6.32 0036 121 4 711period 7result result result result result result
114
Ningbo Jiangdongnanqu WWTP & Sewage Project
* Polluti No No No No No Noon 0.38 6.32 0.072 0.202 0.026 0.474 0.083 result result result result result result
index___Classification
of G 2 D G . G C G3water
qualityTimes
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
d
season 7.77 4.32 0.270 2.83 3.92 0.807 0.088 No No No No No Noseason 7.77 4.32 0.270 2.83 3.92 0.807 0.088 result result result result result result
Polluti No No No No No Noon 0.39 4.32 0.540 0.472 0.039 0.538 0.293 result result result result result result
indexClassification
of 21 water
qualityTimes
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dDry 7.88 5.71 0.209 1.78 2.48 0.878 0.111 0.02 1 0.05 4 2 2
seasonPoll uti
on 0.44 5.71 0.418 0.890 0.025 0.585 0.370 0.02 0.002 0.01 0.04 0.04 0.01index
Classification
of C El, 5 L Cl 3 .- l water
qualityTimes
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dAnnualmean 7.80 5.45 0.17 1.94 3.01 0.80 0.07value
Classifi o 2 i 2 5cation El l
Level 7.91 8.W 0.084 0.61 1.29 0.35 0.019 No No No No No Noperiod 7 result result result result result result
onuti 0.46 8. 0.168 0.100 0.129 0.233 0.063 No No No No No Nooindex result result result result result result
115
Ningbo Jiangdongnanqu WWTP & Sewage Project
Classification
of I II I 1 I II I 1 I 1 Iwaterquality___Times
forexceed 0 0 0 0 0 0 0 0 0 0 0 0standar
Wet 7.88 5.33 0.257 1.84 2.24 0.457 0.019 No No No No No Noseason result result result result result resultPolluti No No No No No No
index 0.44 5.33 0.514 0.307 0224 0305 0063 result result result result result result
Classification
of I III AV I II II I I I I I Iwater
quality _ _ _ _ _ _ _
Timesfor
exceed 0 0 0 0 0 0 0 0 0 0 0 0standar
dDry 8.00 6.97 0.197 1.51 1.67 0.553 0.045 0.02 1 0.04 4 2 2
seasonPolluti
on 0.5 6.97 0.394 0.252 0.167 0.369 0.150 0.02 0.002 0.008 0.04 0.04 0.01index
Classification
of I if IV I I III 11 I I I I I Iwater
Timesfor
exceed 0 0 0 0 0 0 0 0 0 0 0 0stand ar
d _
Annualmean 7.93 6.78 0.18 1.32 1.73 0.45 0.03value
Classification
of I IV I I il 11water
q u a lity' _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ __ _ _ _ _ _ _ _ _ _ _
116
Ningbo Jiangdongnanqu WWTP & Sewage ProjectAs Table 3-10 shown, in 2001 the water quality in the section of Fanshidu of Fenghua River
reached Class IV standard, 3838-2002. The main exceeded indicators are DO, oil and total P; in
general the water quality of the section of Chenglangyan and Yong River conforms to Class IV
3939-2002 standard. There is no indicator exceeding the standard in all seasons too. T
Table 3-1 and 3-5 shown the pollution pollutants average variations monitored at the five
points in recent five years.
8 0. mgml
6-
4 _ DO
2 - BOD5
1997w 1998* 19999 2O000 T 2001 F
Figure 3-1 The Mean Value of Main Pollutants Variations in the Section of Fanshidu in
Recent Five Years
117
Ningbo Jiangdongnanqu WWTP & Sewage Project
4±4!: mg/i
o~~~~~~~~~~~~~~D
6
4 - B _ _ _ 3D5
1997•T1 1998•1 1999•11 2000•1 200149
Figure 3-2The Mean Values of the Main Pollutants Variations in the Section of Zhenglangyan
in Recent Five Years
6 g
3 DO-- -_ =
2 __ -t t ----- __ BOD5
0 ----__ _ _ _ _ _ _ _ _
Figure 3-3 The Mean Value of the Main Pollutants Variations in the Section of Sanjiangkou in
Recent Five Years
_ _ ____ _ _ _--
8-I-
Ningbo Jiangdongnanqu WWTP & Sewage Project
Figure 3-4 The Mean Value of the Main Pollutants Variations in the Section of Zhangjiangan
in Recent Five Years
I10
8) - i _ _ _
6
BOD5
Figure 3-3 The Mean Value of the Main Pollutants Variations in the Section of Youshan in
Recent Five Years
The Monitoring data in the recent five years show that no heavy metals exceeded the standards.
The main pollution indicators affected the water quality of Yong River and Fenghua River is
ammonia nitrogen, total P, oil. DO and BOD5
The analysis of the pollution concentration of each section shows that the highest pollution
119
Ningbo Jiangdongnanqu WWvTP & Sewage Project
concentration is in the section of Sanjiangkou, Chenglangyan and Zhangjiangan taking the second
place. The concentration in the section of Fanshidu and Youshan is the lowest. The reason is that
the area of the Shanjiangkou section is the industrial and living district of Ningbo and the sewage
discharge is larger to pollute the water while the section of Fanhsidu is in the up reaches of Yong
River and Youshan located at the seaport, the dilution ability of the water is higher to reduce the
pollutant concentration.
It is necessary to pay attention to the situation that more and more industrial enterprises set up
along the up reaches of Fenghua River, and the industrial and domestic sewage has been increased.
The water quality in the section of Fanshidu tends to deteriorate and the water quality of Fenghua
River is not optimism .The water quality in the section of Chenglangyan and Sanjiangkou of Yong
River turns better due to the operation of Jiandongbeiqu WWTP and some pollution enterprises
have been relocated from the bank of Yong River. The pollutants discharge has been reduced
resulting in the better change of the water quality. As the section of Youshan is in the seaport with
high dilutioni power so there are little variations for the water quality.
3.5.1.3 Water Quality of Inland River
a) Water quality monitoring data in recent 2 years
Jingdongnanqu WWTP is located at Yingzhou District, which is densely covered with
networks of inland rivers, which are mainly consisted of Nantang River, Qiantang River and
Zhongtang, river .As the monitoring reports in recent years shown that the water quality of the
river network of the district is class III-V. There are 9 monitoring points to be used for routine
monitoring with abundant data collected .The data in 2000 and 2001 are used for this EIA to
analyze the present status of the water quality in the river network of Yingzhou District. The
locations of the monitoring points are shown in attached Figure 2.
The evaluation standard is "Surface Water Environment Quality Standard" GB3838-2002
(the control target in each point is Class III); the method of Single Factor Standard Indictors is
adopted .The evaluation and monitoring results are shown in table 3-12 and 3-13.
2. Monitoring results and evaluation of the EIA
1)
1) Monitoring Point
East side of the small bridge
120
Ningbo Jiangdongnanqu WWTP & Sewage Project
2) Monitoring item
pH, DO, oil BOD, CODM,, CODcr, Ammonia Nitrogen , total , fecal coliform bacteria
negative ion surfactant .
3) Monitoring Time and Frequency
Two days, from 7/6/02---8/6/02;once in the morning and once in the afternoon.
4) Evaluation Standard
GB3838-2002 "Environmental Quality Standard For Surface Water" Class III
5) Evaluation Methodology:
Single factor standard indicator method
6) Monitoring and Evaluation Results:
See table 3-14
Table 3-12 Internal Rivers of Ying County in2000
Amm
a Monito BOD COD ona ev CyaniOil al Hg Pb Cd As alent- ring pH O Mn C de
Datemg/L Mn nitro jag/L p.g/L pg/I. pg/L Cr dC) ~~~~~g/L mg/L ge gI
Level 7.20 0.08 1.83 3.46 1.07 No No No No No Noperiod . result result result result result result
Polluti No No No No No Noon 0.10 1.6 0.46 0.58 1.07 result result result result result result
indexClassification
of / IV I 11 IV I I I I I Iwater
quality: Times
:~forc exceed 0 0.6 0 0 0.07 0 0 0 0 0 0C standar
.) d
Wet 7.26 0.21 2.77 5.79 0.36 No No No No No Noseason . result result result result result result
Polluti No No No No No Noon 0.13 4.2 0.69 0.97 0.36 result result result result result result
indexClassification
of / IV I III 11 I I I I I Iwater
I quality I _I _I
121
Ningbo Jiangdongnanqu WWTP & Sewage Project
Timesfor
exceed 0 3.2 0 0 0 0 0 0 0 0 0standar
d
Dry 6.77 0.608 2.51 4.31 1.09 0.02 2 0.25 4 2 2seasonPolluti
on 0.77 12.2 0.63 0.72 1.09 0.2 0.04 0.05 0.08 0.04 0.01index
Classification
of / V I III i I I l I I Iwater
quality ITimes
forexceed 0 11. 0 0 0.09 0 0 0 0 0 0standar
Annualmean 7.08 0.299 2.37 4.52 0.84value
Class ification
of I I I III IIIwater
quality Level 7.9 01 .3 61 .9 No No No No No Noperiod 7.09 0.16 4.33 6.17 139 result result result result result result
Polluti No No No No No Noon 0.05 3.2 1.08 1.03 1.39 result result result result result result
i ndexC lass ification
o f I IV/ IV J V\! \i I I I I I IwaterqualitvTimes
forexceed 0 2.2 0.08 0.03 0.39 0 0 0 0 0 0
standar
Wet 7.44 0.52 4.47 8.04 2.01 No No No No No Noseason result result result result result result
Polluti No No No No No Noon 0.22 10.4 1.12 1.34 2.01 result result result result result result
indexClassification Exce
of I V RI IV ed I I I I I
water V
122
Ningbo Jiangdongnanqu WWTP & Sewage Project
Timesfor
exceed 0 9.4 0.12 0.34 1.01 0 0 0 0 0 0standar
Dry 7.18 0.834 3.91 5.31 2.53 0.02 2 0.25 4 2 2seasonPolluti
on 0.09 16.7 0.98 0.89 2.53 0.2 0.04 0.05 0.08 0.04 0.01index
Classifi Excecation / V III III ed I I I I I I
V
Timesfor
exceed 0 15.7 0 0 1.53 0 0 0 0 0 0standar
dAnnualmean 7.24 0.505 4.24 6.51 1.98value
Classifi / V rv IV Ication _
Lvl7.07 0.34 5.35 7.07 3.56 No o No o No operiod result result result result result resultPolluti No No No No No No
ondex 0.04 6.8 1.34 1 .18 S 3.56 result result result result result resultindex ____
Classification excee
of R IV IV IV ding I I I I I Iwater V
quality
123
Ningbo Jiangdongnanqu WWTP & Sewage Project
Times - -
forexceed 0 5.8 0.34 0.18 2.56 0 0 0 0 0 0standar
dWet 7.24 0.43 5.62 8.47 3.45 No No No No No No
season result result result result result resultPolluti No No No No No No
on 0.12 8.6 1 .41 1.41 3.45 No o No o No oindex result result result result result result
Classification
of / 1\V T IV Ln V I I I I I Iwater
qualityTimes
forexceed 0 7.6 0.41 0.41 2.45 0 0 0 0 0 0standar
Dry 6.89 1.15 4.49 7.22 6.40 0.02 2 0.25 4 2 2seasonPolluti
on 0.89 23 1.12 1.20 6.40 0.2 0.04 0.05 0.08 0.04 0.01index
Classifi Exce Excecation ~~ed V V ed I I I I
cationl _ !X
Exceed 0 22 0.12 0.20 5.40 0 0 0 0 0 0times
Annualmean 7.07 0.64 5.15 7.59 4.47value
Classification Exce
of / v Ir Ri edwater V
qualit1
124
Ningbo Jiangdongnanqu WWTP & Sewage Project
Continuation Internal Rivers Water Quality of Ying CountyAmm
. Monito BOD COD oniac Sexav CyaniOil al Hg Pb Cd As alent Cynring pH 5 M dec > Date p H mgfL mg nitro pg/L ltg/L ig/L pig/L Cr
Lvl7.21 0.11 4.51 7.36 0.60 No No No No No Noperiod 7.21 result result result result result resultPolluti No No No No No No
on 0.11 2.2 1.13 1.23 0.60 result result result result result resultindex
Classification
of / IV TV IV III I I I I I Iwater
qualityTimes
forexceed 0 1.2 0.13 0.23 0 0 0 0 0 0 0standar
dWet 7.43 0.24 3.71 7.63 0.31 No No No No No No
season result result result result result result
Polluti No No No No No Noon 0.22 4.8 0.98 1.27 0.31 result result result result result result
indexClassification
of / IV III TV 11 I I I I I Iwater
Ca qualityTimes
forexceed 0 3.8 0 0.27 0.31 0 0 0 0 0 0standar
dDry 7.00 0.434 1.64 3.29 0.87 0.02 2 0.25 4 2 2
seasonPolluti
on 0 8.7 0.41 0.55 0.87 0.2 0.04 0.05 0.08 0.04 0.01index
Classification
of / IV I II III I I I I I Iwater
qualityTimes
forexceed 0 7.7 0 0 0.87 0 0 0 0 0 0standar
Annualmean 7.21 0.26 3.29 6.09 0.59value
125
Ningbo Jiangdongnanqu WWTP & Sewaoe Project
Classification
of / IV III TV II1water
_ qualityLevel 7.30 0.15 5.06 8.28 3.11 No No No No No No
7.30e0.15r5.06o8.28 3.11 result result result result result result
Polluti No No No No No No
on 0d15 3 1.27 1.38 3.11 result result result result result resultindex
Classification Exce
of I 1\ IV 1\1 ed I I I I 1
water VqualityTimes
forexceed 0 2 0.27 0.38 2.11 0 0 0 0 0 0
standar
Wet 7.74 0.48 4 82 7.81 1.02 No No No No No No
season result result result result result result
Polluti No No No No No No
on 0.37 9.6 1.21 1.30 1.02 result result result result result resultin dlex __ ___ _ _ __ _ _
Classification
o of / IV V IV 1\ I I I I 1 I_ water
qualityTimes
forexceed 0 7.2 0.21 0.30 0.02 0 0 0 0 0 0
standard
Dry 7.28 0.452 6.22 7.63 2.54 0.02 2 0.25 4 2 2
seasonPolluuti
on 0.14 9.1 1.56 1.27 2.54 0.2 0.04 0.05 0.08 0.04 0.01
indexClassification Exce
of I I\ V IV ed I I I 1 1 Iwater V
qualityTimes
forexceed 0 8.1 0.56 0.27 1.54 0 0 0 0 0 0
standar
Annualmean 7.44 0.361 5.37 7.91 2.22value _
126
Ningbo Jiangdongnanqu WWTP & Sewage Project
Classification Exce
of / IV NV IV edwater V
qualityLevel 7.45 0.09 1.70 5.86 2.50 No No No No No No
7pe1od result result result result result result
Polluti No No No No No Noon 0d23 1.8 0.43 0.98 2.50 result result result result result result
indexClassification Exce
of I V I III ed I I I I l
water VqualityTimes
forexceed 0 0.8 0 0 1.50 0 0 0 0 0 0standar
Wet 7.36 0.24 3.73 7.04 0.81 No No No No No Noseason 7 result result result result result result
Polluti No No No No No Noon 0.18 4.8 0.93 1.17 0.81 result result result result result result
indexClassification
of Nv III Il III I I I I I Iwater
quality~< Times
forexceed 0 3.8 0 0.17 0 0 0 0 0 0 0standar
dDry 6.79 0.747 2.27 5.96 0.69 0.02 2 0.25 4 2 2
seasonPolluti
on 0.79 14.9 0.57 0.99 0.69 0.2 0.04 0.05 0.08 0.04 0.01index
Classification
of I V I III III I I I I I Iwater
qualityITimes
forexceed 0 13.9 0 0 0 0 0 0 0 0 0standar.d
Annualmean 7.20 0.359 2.57 6.29 1.33value
127
Ningbo Jiangdongnanqu WWTP & Sewage Project
Classification
of I RIV A." I\Vwater
quality
Continuation The internal River Water Quality of Yin CountyAmm
Monito Oil BOD COD onia Sexav Cyaniring p H 5 nitro Ho Pb Cd A alent de
_ _ Date pH mg/L mg/L gen ,g/ ,ug ,ug ,ug/L g/L LE_ mg/L __
Level 7.78 0.18 5.52 8.85 1.48 No No No No No Noperiod result result result result result result
Polluti No No No No No Noon 0.39 3.6 1.38 1.49 1.48 result result result result result result
indexClassification
of I\! IV IV LV I I I I I I
waterqualityTimes
forexceed 0 2.6 0.38 0.49 0.48 0 0 0 0 0 0standar
dWet 7.79 0.30 3.96 7.79 0.22 No No No No No No
season .22 result result result result result result
Polluti No No No No No Noion 0.40 6 0.99 1.30 0.22 result result result result result resultindex
O Classification
of I IV III I\ 11 I I I I I Iw ater
quality _ _ _ _ _ _ _ _ _
Timesfor
exceed 0 5 0 0.30 0 0 0 0 0 0 0standar
d
Dry 7.21 0.540 3.64 8.44 1.16 0.02 2 0.25 4 2 2seas on__ _ __ _ _ _
Pollution 0.11 10.8 0.91 1.41 1.16 0.2 0.04 0.05 0.08 0.04 0.01
indexClassification
of I V III lV IV I I I I I Iwaterquality | _
128
Ningbo Jiangdongnanqu WWTP & Sewage Project
Timesfor
exceed 0 9.8 0 0.41 0.16 0 0 0 0 0 0standar
dAnnualmean 7.59 0.34 4.37 8.36 0.95value
Classifi / IV IV IV IIIcation
Level 7.40 0.16 2.28 4.97 0.94 No No No No No Noperiod result result result result result resultPolluti
on 0.20 3.2 0.57 0.83 0.94 No No No No No Noindex . result result result result result result
Classification
of / I\/ I III III I I I I lwater
qualityITimes
forexceed 0 2.2 0 0 0 0 0 0 0 0 0standar
Wet 7.26 0.33 3.65 5.88 0.72 No No No No No Noseason result result result result result result
Ponut 013 6.6 0.91 0.98 0.7 No No No No No Noindex _ result result result result result result
Classification
of / IV III III III I l l l ls water
quality ITimes
forexceed 0 5.6 0 0 0 0 0 0 0 0 0standar
d
Dry 7.03 0.66 1.84 2.11 1.29 0.02 2 0.25 4 2 2seasonPolluti
on 0.02 15.2 0.46 0.35 1.29 0.2 0.04 0.05 0.08 0.04 0.01index
Classification
of / V I 11 IV I I I l I lwater
quality____Times
forexceed 0 14.2 0 0 0.29 0 0 0 0 0 0standar
129
Ningbo Jiangdongnanqu WWTP & Sewage Project
Annualmean 7.23 0.38 2.59 4.32 0.98value
Classifi I\ _ Ill 1 cation
As table 1-11 shown, in 2000 the water quality of the sections of Chenjiao, Tongpenpu,
Xianzhong, Meixu and Wuxiang is Class IV water bodies and the section of Shigan is Class V
and the sections of Panhuo and Wangchun exceed the standard of Class V. The main pollutants
exceeded are oil: CODMn. BOD 5 d ammonia nitrogen .No heavy metals exceed the standard in the
monitoring items.
Table 3-13 The internal River of Ying County 2001
BOD AmmMonito Oil BOD COD onAa Sexav Cyani
5 ~ ~ ito Hg Pb Cd As alent Cyn_ ring PH Mg/ Mgg mgl nitro _L Cr de
Da e L Mg mgmL gen 'p'-/L j.t/L CL~~m/
NoLvl 7.34 0.28 3.163 5.20 2.15 No No No No No reu
period result result result result result result
~~ Polluti ~~~~~~~~~No No No No No N_ on 0.17 5.6 0.79 0.R7 2.15 No N o N o resul
on 0.17x 5.6 0.9 0.87 2.15 result result result result result rindex
cation Exceof / IV III III ed I I I I I I
water Vquality I
130
Ningbo Jiangdongnanqu WWTP & Sewage Project
Timesfor
exceed 0 4.6 0 0 1.15 0 0 0 0 0 0stand ar
d
Wet No No No No No resulseason 7.03 0.16 4.84 4.73 0.9 result result result result result t
t
Polluti Noon 0.02 3.2 1.21 0.79 0.9 No No No No No resul
index result result result result result t
Classification
of / IV IV JII III I l I I I Iwater
qualityTimes
forexceed 0 2.5 0.21 0 0 0 0 0 0 0 0standar
d _
Dry 7.27 0.09 2.85 4.87 2.48 0.02 5 0.5 4 2 2seasonPolluti
on 0.14 1.8 0.71 0.81 2.48 0.2 0.1 0.1 0.08 0.04 0.01index
Classification Exce
of / IV I III ed I I I I I Iwater V
qualityTimes
forexceed 0 0.8 0 0 1.4 0 0 0 0 0 0standar
dAnnualmean 7.21 0.18 3.62 4.93 1.84value
Classification
of / TV III III Vwater
quality NoNo
Level 7.62 0.33 11.49 10.4 2.24 No No No No No lperiod . . result result result result result resu
t
Polluti NoNo No No No No
on 0.31 6.6 2.87 1.73 2.24 result result result result result resulindex t
131
Ningbo Jiangdongnanqu WWTP & Sewage Project
Classification Exce Exce
of R IV ed V ed I I I I I Iwater V V
quality _ _ _ _ _ _
Timesfor
exceed 0 5.6 1.87 0.73 1.24 0 0 0 0 0 0standar
d
Wet . 0.25 9.16 8.94 2.42 No No No No No resulseason result result result result result
Polluti No N o N o Non 0.19 5 2.29 1.49 2.42 reul reul reul reul reul resul
index _ _ resu It resull resull resul t rcsult t
Classification Exce
of / IV V IV ed l I I I I Iwater V
qualityTimes
forexceed 0 4 1.29 0.49 1.42 0 0 0 0 0 0standar
dDry 7.25 0.21 3.70 4.33 2.02 0.02 5 0.5 4 2 2
seasonPolluti
on 0.23 4.2 0.93 0.72 2.02 0.2 0.1 0.1 0.08 0.04 0.01index
Classification Exce
of I f\ lIII III ed I I I I I Iwater V
qual itvTimes
forexceed 0 3.2 0 0 1.02 0 0 0 0 0 0stand ar
Annualmean 7.42 0.26 8.12 7.89 2.23value _
Classification Exce
of / IV V IV edwater V
qualityNo
~ Level 7.52 0.42 13.4 15.85 12.90 No N o N o resulperiod result result result result result
t
132
Ningbo Jiangdongnanqu WWTP & Sewage Project____
Polluti Noon 0.26 8.4 3.35 2.64 12.90 No No No No No eu
index result result result result result reu____________t
Classification Exce Exce Exce
of I IV ed ed ed I I I water V V V
quality ___
Timesfor
exceed 0 7.4 2.35 1.64 11.90 0 0 0 0 0 0standar
dWet 73 030 125 16 353 No No No No No No
7.0e.3a1.5o0.n33 result result result result result result
Polluti No No No No No Noon 0.15 6 3.56 1.77 3.53 result result result result result result
indexClassification Exce Exce
of AlI ed V ed I I I I I Iwater V V
quality____Times
forexceed 0 5 2.56 0.77 2.53 0 0 0 0 0 0standar
d
Dry 7.35 0.22 7.66 11.3 5.33 0.02 5 0.5 4 2 2seasonPolluti
on 0.18 4.4 1.92 1.88 5.33 0.2 0.1 0.1 0.08 0.04 0.01index ____
Class ification Exce
of I 1\V V V ed I I I I I Iwvater V
qualityITimes
forexceed 0 3.4 0.92 0.88 4.33 0 0 0 0 0 0standar
dAnnualmean 7.39 0.31 11.77 12.58 7.25value
Class ification Exce Exce
of I IV ed V edwater V V
Iquality I_I_I_I
133
Ningbo Jiangdongnanqu WWTP & Sewage Project
Continuation The Internal River Water Qualty of Yin County 2001Amm
Monito BOD COD onia Sexav Cyanirin PH oil 5 M1 nto Ho P Cd As alent d
Date mL mg/L mgL genio
g g/L g g / gLevel 7.46 0.155 6.56 7.34 0.32 No No No No No Noperiod 7.46 0.155 6.56 7.34 0.32 result result result result result result
Polluti No No No No No Noon 0.23 3.1 1.64 1.22 0.32 result result result result result result
index ___
Classification
of / I\ V RVf I I I I I I Iwaterquality _
Timesfor
exceed 0 2.1 0.64 0.22 0.32 0 0 0 0 0 0standar
dWet 7.47 0 93 5.2 8.S8 0.86 No No No No No No
season .2 .2 result result result result result result
Polluti No No No No No Noon 0.24 4.6 1.30 1.43 0.86 result result result result result result
indexClassification
of / Ti RI IV III I I 1 I I l) water-S quality
,G Timesfor
exceed 0 3.6 0.30 0.43 0.86 0 0 0 0 0 0
standar
Dry 6.81 0.16 3.71 5.00 0.66 0.02 5 0.5 4 2 2seasonPolluti
on 0.81 3.2 0.93 0.83 0.66 0.2 0.1 0.1 0.08 0.04 0.01
indexClassification
of IV III III III I I I I Iwater
quality .Times
forexceed 0 2.2 0 0 0.66 0 0 0 0 0 0
standar
Annualmean 7.25 0.18 5.16 6.97 0.61value
134
Ningbo Jiangdongnanqu WWTP & Sewage Project
Waterqualityclassifi IV IV I\J IIIcationLevel 7.14 0.35 9.86 11.8 5.79 No No No No No Noperiod result result result result result resultPolluti _
on 0.07 7 2.47 1.97 5.79 No No No No No Noindex result result result result result result
Classification Exce
of / IV V V ed l l I I I Iwater V
qualityITimes
forexceed 0 6 1.47 0.97 4.79 0 0 0 0 0 0standar
Wet 7.00 0.15 7.31 7.91 2.25 No No No No No Noseason result result result result result resultPolluti No No No No No No
on 0 3 1.83 1.32 2.25 result result result result result resultindex
Classification Exce
of R IV V IV ed I I I I l
water VqualityTimes
forexceed 0 2 0.83 0 1.25 0 0 0 0 0 0standar
dDry 7.13 0.18 7.20 8.68 2.24 0.02 5 0.5 4 2 2
seasonPolluti
on 0.07 3.6 1.80 1.45 2.24 0.2 0.1 0.1 0.08 0.04 0.01index
Classification Exce
of IV V RI ed I I I I I Iwater V
qualityIExceedstandar 0 2.6 0.80 0.45 1.24 0 0 0 0 0 0d timesAnnualmean 7.09 0.23 8.12 9.46 3.43value
Classification Exce
of IV V IV edwater V
qualityLevel 7.02 0.175 6.81 8.78 1.39 No No No No No No____ period _____ ______ ______ ______ ______ result result result result result result
135
Ningbo Jiangdongnanqu WWTP & Sewage Project
Pollution 0.01 3.5 1.70 1.46 1.39 No No No No No No
index result result result result result resultClassification
of R I V I\ i I I I I I Iwater
qualityTimes
forexceed 0 2.5 0 0.46 0.39 0 0 0 0 0 0standar
Wet 7.19 0.12 7.89 8.04 1.56 No No No No No Noseason result result result result result result
Pon 010 2.4 1.97 1.34 1.56 No No No No No Noindex result result result result result result
Classification
of I I\ V IV V I I 1 I Iwater
quality _Times
forexceed 0 1.4 0.97 0.34 0.56 0 0 0 0 0 0standar
dDry 7.02 0.11 6.29 8.16 2.48 0.02 5 0.5 4 2 2
seasonPolluti
on 0.01 2.2 1.57 1.36 2.48 0.2 0.1 0.1 0.08 0.04 0.01index
Classification Exce
of 1\1 V IV ed I I I I I Iwater V
q ual itv _ _ __ _ _ _ _ _ _ _
Timesfor
exceed 0 1.2 0.57 0.36 1.48 0 0 0 0 0 0standar
dAnnualmean 7.08 0.135 7.00 8.23 2.72value
Classification Exce
of I IV V IV edwater V
quality
136
Ningbo Jiangdongnanqu WWTP & Sewage Project
Continuation The Internal River Water Quality of in County 2001Amm
o Monito Oil BOD COD oniac Sexav Cyani* ~~~~~~ ~~~ ~~al Hg Pb Cd As alent Cyn
t5 ring PH Mg/ 5 Mn nir g r de_ niig P g gL m tro [ig/L lig/L 1g L ,ig/L Cr eO ) Date L mg/L mgIL gnpg/L
Level 7.16 0.25 6.93 10.5 1.53 No No No No No Noperiod result result result result result result
Polluti No No No No No Noon 0.08 5 1.73 1.75 1.53 result result result result result result
indexClassification
of / IV V V V I I I I I Iwater
quality .Times
forexceed 0 4 0.73 0.75 0.53 0 0 0 0 0 0standar
Wet 7.39 0.21 3.79 8.37 1.72 No No No No No Noseason result result result result result resultPolluti No No No No No No
on 0.20 4.2 0.95 1.40 1.72 result result result result result resultindex r r r r r r
Classification
of IV III IV V I I I I I I2 water
qualityTimes
forexceed 0 3.2 0 0.40 0.72 0 0 0 0. 0 0standar
dDry 7.07 0.17 4.72 8.53 2.03 0.02 5 0.5 4 2 2
seasonPolluti
on 0.04 3.4 1.18 1.42 2.03 0.2 0.1 0.1 0.08 0.04 0.01index
Classification Exce
of / IV IV IV ed I I I 1 1 1water V
qualityExceedstandar 0 2.4 0.18 0.42 1.03 0 0 0 0 0 0d timesAnnualmean 7.21 0.21 5.15 9.13 1.76value
137
Ningbo Jiangdongnanqu WWTP & Sewage Project
Classification
of I IV RI' Al Vwater
quality
Level 7.4 02 .5 56 .3 No No No No No Noperiod 7.34_ 0.20 4 85 5 61 1.13 result result result result result result
Polluti No No No No No Noon 0.17 4 1.21 0.94 1.13 result result result result result result
indexClassification
of A lV IV III IV I I I I I TwaterqualityTimes
forexceed 0 3 0.21 0 0.13 0 0 0 0 0 0standar
Wet 7.20 0.23 4.40 6.90 1.05 No No No No No Noseason result result result result result result
Pollutn No No No No No Noon 0.10 4.6 1.10 1.15 de.x result result result result result result
indexClassification
of' I \ IV IV 1\ I I I I I Iwater
qualityItimest for
exceed 0 3.6 0.10 0.15 0.05 0 0 0 0 0 0standar
Dry 6.89 0.20 3.39 5.38 0.67 0.02 5 0.5 4 2 2seasonPolluti
on 0.89 4 0.85 0.90 0.67 0.2 0.1 0.1 0.08 0.04 0.01index _
Classifi / 1 II II I I I I I I
cation _Times
forexceed 0 3 0 0 0 0 0 0 0 0 0standar
dAnnualmean 7.14 0.21 4.21 5.96 0.95value
classification
of A IV RV III IIIwater
quality
138
Ningbo Jiangdongnanqu WWTP & Sewage Project
As table 3-12 shown that the water quality of the river network of Yinzhou District is as
following: Wuxiang Class IV; Chenjiap and Meixu Class V; Shigan, Wangchun, Tonepenpu,
Xianzhong and Panhuo above Class V. The main pollutants exceeded are BOD 5. CODcr and
ammonia nitrogen of which the pollutants of ammonia nitrogen exceeds Class V in all tidal periods
and sections except for the sections of Wuxiang and Tongpenpu No heavy metals exceed the
standard.
The comprehensive analysis with the data of 2000 and 2001 shows the water quality in 2001
dropped down in comparison with the data in 2000, of which the water quality in the sections of
Chenjiao and Meixu in 2000 was Class IV but Class V in 2001 and the water quality of Tongpenpu,
Xianzhong and Shigan was turned into Class V. This shows the trend of deteriorating of the water
quality in Yinxian district due to the economic booming and increased population to cause the
discharge of industrial and domestic sewage increased continually
Table 3-14 Monitoring and Evaluation Results for the River in the East Side
AmmDO COD CDI BOD Total Fecal onia
.2 Monitoringg pH DO Cr COD,,, B T coliform Nitro Oil LASdate pgH mg/i. mg/LL mg/L mg/Lmg mg/i. clusteriL gen
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ~~~~mg/L
a.m 7.0 4.85 65.9 13.9 7.36 0.478 9.2X 103 0.50 0.10 0.286.7 I
p.m 7.0 7.88 72.2 14.2 4.63 0.472 1.6 X 104 0.31 0.09 0.23U~~~~~~~~~~~~
6. a.m 6.6 4.90 52.5 18.6 4.16 0.550 5.4 X 103 0.30 0.16 0.20
q 8 p.m 8.20 51.7 17.7 4.31 0.544 5.4X 103 0.36 0.22 0.23U~~~~~
average 648 6.46 60.6 16.1 5.12 0.511 9.0 X 103 0.37 0.14 0.24
(U classificatio> casit abov above aboven of water ' V V fv V III1 V IV
qualityE pollution 0.8 4 3.03 2.68 1.28 2.555 0.9 0.37 2.8 1.2
Exceedstandard 0 / 2.03 1.68 0.28 1.555 0 0 1.8 0.2
times
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Ningbo Jiangdongnanqu WWTP & Sewage Project
As table 3-13 shown that the river is Class V water body and the main pollutants exceeded the
standard are CODcr, CODMfl, BOD5 total P, oil and LAS, The exceeding times are
2.03,2.68,0.28,1.8and 1.2. The pollution indicator analysis shows that the main pollutants of the
small river are CODcr, CODM and total P The pollution of the river is caused by narrow
watercourse, small capacity of water environment and domestic sewage discharged directly into the
river.
3.5.1.4 Current Sediment Status of Fenghua River and Yong River
The Monitoring Center of Ningbo Municipality conducts monitoring to Yongjinag River and
FenghuanJiang River once in every other 5 years. The monitoring stations are located at Fanshidu
and Chenglangyan along the Fenghua River and Sanjiangkou. Zhangjiangan and Youshan along
Yongjiang River. The most recent available data in 1998 are used in this analysis. See attached
figure 2 for the monitoring points.
"The Control Standard for pollutants in Agro-sludge" is adopted in the EIA and evaluation
method is single factor standard index method. . The evaluation results of the sediment is shown in
table 3-15:
Table 3-15 Current Status of the Sediment of Yong River and Fenghua
River (unit: mg/kg)
MonitoMecToaring Items r Cu Total Cr As
stations
Sampl 1 1 1 1 1 1e
Fanshi Monitodu ring 0.262 40.98 192.41 24.44 0.190 6.18
valuePi 0.017 0.082 0.192 0.024 0.010 0.082
Chengl Sampl 1 1 1 1 1 1angyan es
Monito 0.372 56.64 260.54 26.76 0.057 7.98ring
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Ningbo Jiangdongnanqu WWTP & Sewage Project
Pi 0.025 0.113 0.260 0.027 0.003 0.106Sampl 1 1 1 1 1 1
esSankia Monito 0.195 41.67 159.82 22.6 0.137 8.03
ngkou ringPi 0.013 0.083 0.160 0.023 0.007 0.107
Sampl 1 1 1 1 1 1Zhangj es
ZhangJ Monito 0.123 32.46 165.46 18.30 0.140 9.58iangan ring
Pi 0.008 0.065 0.165 0.018 0.007 0.128Sampl 1 1 1 1 1 1
es
VounsMonitoYouns ring 0.221 38.72 152.82 19.30 0.024 8.16han value
Pi 0.015 0.077 0.153 0.018 0.001 0.109Standard value 15 500 1000 1000 20 75
The sediment quality of Yongjiang River and Fenghuajiang River is conform with limited
value prescribed in "Control Standard for pollutants in Agro-sludge" GB4284-84The analysis on
the data from each monitoring points shows that the concentration of heavy metals in the sediment
in the sections of Fanshidu and Chenglangyan is higher than that in the sections of Yong River
points. This is shown that the sediment pollution in Fenghua River is more serious than that in
Yong River.
3.5.2 Ambient Air
3.5.2.1 Assessment scope
500 m from the WWTP
1) Monitoring Points Setup
It is located at the eastern side of the WWTP.
2) Monitoring Items
SO> NO 2, TSP. NH3 , H2S0
3) Monitoring Method
According to the technical criterions of environment monitoring
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Ningbo Jiangdongnanqu WWTP & Sewage Project
4) Monitoring time and frequency
For SO2and NO2 at least 18 hours a day for sampling, TSP at least 12 hours a day for
sampling. NI3and H2 S are monitored one time value and each monitoring time is under 1 hour, and
the monitoring will last for 5 days.
5) Monitoring results
See table for details.
Table 3-16 Air Environment Monitoring Status (unit mg/m3)Sampling SO2 NO2 NH3 H2S TSP
time
6 A 8 El 0.004 0.007 0.126 <0.003 0.103
6 A 9 F 0.011 <0.002 0.961 0.003 0.208
6 A 10 H 0.009 0.025 0.102 0.005 0.222
6 1 11 H 0.013 0.024 0.104 0.003 0.099
6 S 12 R <0.003 <0.002 0.031 <0.003 0.118
See table for related parameters of meteorology
Table :3-17 Meteorology Factor Monitoring Results
Sampling Temperatu Air Windtime re C hpressure direction Weather
time re ~~hPa
8/6/02 28 1008.0 NNE Fine9/6/02 30 1006.0 NW Fine10/6/02 29 1007.0 NNE Fine
11/6/02 31 1008.0 WNW Fine12/6/02 32 1007.0 WNW Fine
3.5.2.2 The Current Status of Ambient Air Assessment
1) EvaluaFion MeFhod
The singe facFor sFandard indicFor meFhod and exceeding raFio are used for Fhe
evaluaFion The definiFion of Ii is:
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Ningbo Jiangdongnanqu WWTP & Sewage Projectli=Ci/Coi
In formula: Ci---Current monitoring value of certain pollutant
Coi---Standard value of assessment for certain pollutant factor
Ii) lmeans exceeding the standard otherwise means meet the standard
2) Evaluation Results
See table 3-18 for details:
Table 3-18 Assessment of Results of Current Monitoring Status
Item Sampling time Mean value Max Standardexceeding index
timesSO2 Daily mean 0.008 0 0.053
valueNO2 Daily mean 0.012 0 1.000
valueTSP Daily mean 0.150 0 0.500
_ _ _ _ _ _ _ _ _ _ _ _ _v a lu e _ _ _ _ _ _ _
H2S Hour value 0.003 0 0.300NH3 Hour value 0.265 3.8 1.325
The current status of ambient air is sum up like this:
1) S02
The concentration of daily mean value in all area is smaller; the max value is 0.013mg/m 30oiiY
accounting for 8.7% of Class II of the air standard.
2) NO2
The daily concentration of NO 2 is under the Class II air standard. The max concentration is
0.025mg/m3 accounitinig for 20.8% of Class II air standard.
3) TSP
The max daily concentration value of TSP is 0.222-mg/m3 accounts for 74% of the standard value
without exceeding Class II standard.
4) H2 S
The max hourly concentration of H2S in the project is 0.005mg/mi3 accounting for 50% of the
standard value without exceeding the limit value set in the regulation of "The Maximum
Permissible Concentration for Pollutants in the Air of Residential District "
5) NH3
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Ningbo Jiangdongnanqu WWTP & Sewage Project
The hourly concentration of NH3I- exceeds the standard in all areas. The maximum value is
0.961mg/m3 and the exceeding times are 3.8 times.
3.5.3 Acoustic Environment
3.5.3.1 The Assessment scope
200 meters from the boundary of the WWTP and 50 meter from the pumping stations
3.5.3.2 Monitoring of the current status of the Acoustic environment
1) Monitoring points
The monitoring points are set up in the south. west, north of the WWTP and in the east of
WWTP the monitoring point is located between the plant and the industrial zone The monitoring
points have been set up in 1 m from boundary of Ningzhong pumping station, Wudongzha pumping
station Huanchengnanlu pumping station.
2) Monitoring, Items
Equivalent sound level Leq (A), once on the daytime and at night
3) Monitoring Method
Based on "Urban Area Noise Measuring Method " (GBtT14623-93)
4) Monitor-ing Results
See following table 3-19,3-20 for details:
Table 3-19 Noise Monitoring results for Jiangdongnanqu WWTP (Unit
LAeq dB)
ots East South West North Middle
Daytime 58.3 47.9 47.2 54.8 49.6Nighttime 46.5 48.6 47.45 51.4 47.7
According to statistics the vehicle flux is 654V/h at daytime and 74 v/h at nighttime.
Table 3-20 Monitoring results for pumping stations and plant boundary
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Ningbo Jiangdongnanqu WWTP & Sewage Project
(unit : LAeq dB)
Yudongzha Ningbo MiddlePumpingzhtatin School Pumping South Beltway
Time Pumping station Station Pumping StationNoise source 80.1 80.7 89.0
Plant boundary 65.3 59.8 57.3noise (daytime)Plant boundary 63.5 59.9 56.6noise (nighttime)
3.5.3.3 Current Status Assessment of Acoustic Environment
As the monitoring result shown that the noise in the east, south, west and middle of the WWTP
does not exceed the standard of Class III set in the "Urban Area Noise Environment Standard" .
The north of the plant is near the expressway and the noise here does not exceed Class IV standard.
The noise of the pumping stations reaches the standards in the daytime and exceeds the limited
value of 55 dB at night, of which the standard exceeds in Wudongzha pumping station and South
Huanzhengnan St. Due to noise of pump and water discharge. The noise pollution of Ningzhong
is due to the opening windows of pump house and pumping noise. .
3.6 Ecological Environment
The WWTP is located in the center area of Yingzhou district in northwest of the aggradations
basin of Ningbo with a large area of sea facies aggradations layer .The topography is flat with large
coverage of water system .It is a typical water network area in the south of China The total area of
the rivers in the area is 82.95 ha accounting for 2.7% of the total land area.
There are two types of soil in the project site i.e. alluvial soil and paddy soil.
The profile structure of alluvial soil consists of layers of surface soil, subsoil,
parent material or surface soil, subsoil and parent material with salt content. The
depth of the soil layer is about 1 m. The soil is characterized by a large pH variation,
loose with good ventilation and permeability, a dampness regolith, and easiness of
tillage. The parent material of paddy soil is ancient river or lake or lake-sea facies
deposit, belongs to factitiously cultivated soil with moderate texture, proper pl-l
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Ningbo Jiangdongnanqu WWTP & Sewage Project
range, deep soil layer, high curing degree, no special obstacle layer, and easiness
for amendment and cultivation. The soil in the area is high degree vegetable soil
with high productivity, it is mainly used for planting grain crops and industria]
crops such as Chinese iris, rapeseed, melon, orange, green-stuff, grass seed and etc.
As the area is greatly influenced by human activities, wild animals are mainly
little ones, such as rats, etc., so no protection measure shall be considered for
them. Birds are mainly waterfowls over Fenghua River, but seldom seen in the urban
area.
'I'he project area is planned to be a central area for economic development, since
economy in this district is already comparably well developed. The land to be
occupied by the project is the land with relatively high productivity. The area
surrounding the plant is fairly flat, which is suitable for various municipal
constructions. The soil is stable and highly resistant to erosion since the land is
flat and the soil contains as high as 3% of' organic matter.
The site of the WWTP covers the cultivated land and residential area.
It has gone shot of the fishery resources in Yong River and Fenghua River in recent
years due to the water pollution and there are less manpower breed aquatics on the
river.
Current Status Survey on Industrial Pollution Sources Around
'I'he main assessment of the EIA is water environmental assessment so the survey
is conducted in the service area to the present and planned discharges of industrial
sewage .'I'he range of the survey includes the sections of Fanshidu of Fenghua River
and Zhenhai estuary of Yong River .The results of the survey are shown in Table
3-21,3-22,3-23.
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Ningbo Jiangdongnanqu WWTP & Sewage Project
Table 3-21 Main pollutants discharged into Yong River in the EIA range(Unit: tla)
Hex CaC Tot Tot0 No Enterprises Aare Waste CODc ad Cya ppC Zin al alNo Enterprises ~a water r chrno pe c nick chr
ome ens r el ome
Ningbo Cigarette Jian 327001 Factory gdo 0
ng
2 Ningbo Jufeng Jian2 Chemiicals Co. Ltd. gdo 54900
Jian 12592 0.00 0.00 0.0 0.00 0.00 0.003 7815 Factory of PLA gdo 8 3 2 05 1 1 4
Ningbo Oriental Port Jian 27700 14.694 electrochem-istry Co., gdo 0 7
Ltd. ng
Ningbo Plastic Co., JianLtd. gdo 46412
6 Ningbo Plastic and Jian 36300 0.029 0.02Plating Factory gbei .0 4
7 Ningbo Hengrun Jian 13000Plastic Co., Ltd. gbei 0Ningbo Modern Jian 50036
8 Building materials gbei 3Co., Ltd.
Zhongce Dynamical Jian 140209 Mechanical and Ja 42
Electronic Co., Ltd. gbei 0
10 Ningbo Tongda Plastic Jian 14900 13.15Mechanical Co., Ltd. gbei 0 0Ningbo Aimeke Valve Jian 35000
Co., Ltd. gbeilVMingxin Chemical Jian 13400
12 Mechanical Co., Ltd/ gbei 0
13 Ningbo Yuejin Jian 40600Qiangiao Co., Ltd. gbei
14 Ningbo Mingxi Jian 12210 1.700 0.0
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Ningbo Jiangdongnanqu WWTP & Sewage Project
Electrons Co., Ltd. gbei 0 06 = =-
15 Ningbo Dongnanxi Jian 45000____ Malt Co., ,Ltd. gbei __ __
Ningbo Mingda Yin16 Nnb nga zho 8640016 Dyeing Co.,Ltd zh 860
Ningbo Xinyang Yin 4050017 Textile Co., Ltd. zo 0 4.
U
Ningbo Mingfeng Yn1260018 Knitting Co., Ltd. Zho 0
Ningbo Haimeng Yn1980019 Industrial Co., Ltd. zho 0 8.28
Table 3-22 Pollutants Discharged into Fenghua River in Service Area ofJiangdongnaqu WWTP
(Unit: t/a)
Wast Hexa Tot Totae COD d cyanid copp zin al
Wate cr chro e er c nick chror me el me
Ningbo1 Changfeng Jiangd 49200 24.35
Thermoelectric ong 0 4ity Co., Ltd.
Ningbo
2 Jinzhong Jiangd 50000 2.480Season Food ong
Co., Ltd.3 Ningbo No. 1 Jiangd 43200 3.110
Woolen Plant ongNingbo Jag 80
4 Shuangyuan Jiangd 18500 2.171Co,. Ltd. ong 0
Ningbo Fan Jiangd 34800Co., Ltd. ong
6 Ningbo Water Jiangd 135506 -Meter Stock ong 0
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Ningbo Jiangdongnanqu WWTP & Sewage Project
Co., Ltd. I I IIIT 1Ningbo
7 Rusheng Jiangd 67000Industrial Co., ong
Ltd.Ningbo
8 Dongmu New Jiangd 10040 0.460Materials ong 0
Stock Co., Ltd. _____ _ _ _
Ningbo9 Yunqiang Fine Jiangd 3220 0.003 0.007 0.00 0.00
Machine Co., ong 9 8___ ~Ltd. _ _ _ _
10 Ningbo Milk Haishu 99000 6.440Co.
TCC Ningbo 14800 10.3611 Vintage Wine Haishu 0 0
Co., LtdNingbo 15136 15.13
12 Renfeng Cloth Haishu 0 6Plant
Ningbo Yaning13 Printing Co., Haishu 33000
L td. _ _ __ _ _ _ _ _
Ningbo No 114 Pharmaceutical Haishu 60000
___ ~Plant _ _ __ _ _
Ningbo Lihua15 Pharmaceutical Haishu 77000 5.220
PlantNingbo Shenle
16 Electric Haishu 35500 8.100Engineering
Alloy Co., Ltd.
Ningbo Kangji 16080 0.0317 Stainless Steel Haishu 0 0.123
Co., Ltd.Ningbo Xinluo
18 Electrical Haishu 19000Appliance Co., Hasu 0
Ltd. 019 ~Niingbo
19 Ningbo Haishu 47000 2.760Xingrong I I I I I I I I 4
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Ningbo Jiangdongnanqu WWTP & Sewage Project
ElectricalAppliance Co.,
Ltd. __ _Ningbo Albeisi
20 Electrons Co., Haishu 90000Ltd. - _
NingboChinese
21 Traditional Haishu 15000 34.88Medicine 0 0
PharmaceuticalPlant _
Zhonghua 87368 538.122 Paper Board Haishu 98 93
C o., Ltd. _ _ _ _ _ _ _ _ _ _ _ _
23 Ningbo Yiming Haishu 65000W ine Co., Ltd. _______ _______
Ningbo Bulijie Yinzho 81000 76.9524 Knitting Group 0 0
Co., Ltd.Ningbo Jia
25 Dyeing and Yinzho 40500 28.35finishing u 0 0Co.,_,Ltd. _
Yingxian
26 Zhenxing Yinzho 41800 8.370Thread Strap uDyeing Plant _ _
Yingxian27 KXinxing Yinzho 40500 3.200
27 Knitting 400320BleachingFactory _
28 Ningbo Yak Yinzho 27000 162.0Paper Co., Ltd. u 00 _
29 Ningbo Darong Yinzho 27000 18.09Food Co., Ltd. u 0 _
NingboJinsheng Yinzho 31.36
30 Woolen u 94500 0Factory _
31 Ningbo Liyang Yinzho 13500 16.2Dyeing and u 0 _
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Ningbo Jiangdongnanqu WWTP & Sewage Project
Finishing Co.,_ _ _ ~L td . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
32 Ningbo Jinshi Yinzho 23300 116.5| Beer Co., Ltd. u 00 | * i l l _ _
Table 3-23 Main Planed Pollutants to be Discharged into Yong River andFengha River
ReceivingNo. Enterprises Areas Waste water (t/d) Water
Body
I Phase I of Ningbo Weike Beilu District 8889.67 YongIndustrial Park River
Ningbo Jiandongbeiqu Jiangdong 10000 YongWWTP District 30000-0River
Ningbo Anna Garment Yingzhou Fenghua3 Complement Materials District 2000 River
Co. LtdNingbo Younger Yingzhou Fenghua
4 Sino-Japan Textile Co., District 3529 RiverLtd. District River
5 Ningbo Younger Knitting Yingzhou 4246 FenghuaCo., Ltd. District River
Ningbo Yike Garment Yingzhou Fenghua6 Complement Materials District 890 River
Plant ______________
Note: The waste water of from No 4, 5 items above will be combined and then to be connected
with the domestic water of Younger Garment Town (1350t/d), and the sewage will be discharged
into Fenghua River after being treated in the sewage treatment station with a sewage treatment
capacity of 1 lOOOt/d.
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
4 Anticipated Environment Impacts and
Prevention and Abatement Measures
4.1 Environmental impacts projection and prevention
and abatement measures for surface water
4.1.1 The Environment impact of surface water in the
construction stage
4.1.1.1 Environmental Impact Analysis of the Surface Water
The sewage to be generated in the construction period mainly is sewage, rain water and
slurry water from the construction site The construction ranges over areas of Jiangdong
District. Haishu District, Yingchou District .A large area will be affected by the project.
There will be a certain impact on the ecological condition of the water area of Fenghua
River due to the construction of river crossings and outfall. . The construction will stir the
water body to move the sediment and cause the increase of ss and pollutants so as to
deteriorate the water quality of the water body to affect the ecological environment of the
river. But this kind of impact is small and limited. Besides this the oil leaking of construction
equipment may affect the water body and the leaked oil is difficult to degradation.
The domestic sewage in the construction period is also an important pollution source due
to the construction scale, range and people working for the project.
4.1.1.2 The Pollution of Surface Water and Measures for PreventionAbatement
1. The rain and sewage, piling slurry water and hydrocele in the site should be collected
and discharged into Fenghua River after sedimentation disposal .. The temporary living
facilities, eateries, oil isolating tanks, toilets, septic tanks should be built. The wastewater
from the eatery should be sent to oil isolating tanks and then treated in the septic tank with
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
other domestic water together to reach Class II standard prescribed in "Comprehensive
Standard for Sewage Discharge" and then to be discharged into Fenghua River. Sewage
discharging to the inland rivers should be forbidden.
b) The builders in pipeline construction should try to use the existing living
facilities near the construction site.
3, Strengthen management of the construction site to keep construction site flat and the
slope of the stack of earthwork should be leveled off .Tree and grass planting should be done
as soon as the construction finished.
4, The rational schemes should be chosen for the construction of river crossings and
outfalls to reduce excavation of the sediment to the great extent . Strengthen maintenance of
the construction equipment to check up construction equipment before using to avoid the
incidents of oil leaking and others.
4.1.2 The projection of the environmental impact on surface
water in operation stage and measures for prevention and
abatement
Jiangdongnanqu WWTP is located at Jiangdong District, Ningbo, to the south of
Hangzhou to Ningbo expressway, to the east of Fenghau River. The sewage discharge
capacity in the phase is 160000m3 /d with sewerage. The spare construction land is reserved
for the final capacity of 400000m 3/d. (See attached figure for the location of the outfall).
4.1.2.1 Projection of pollutants to be discharged
The design influent water quality of Jiangdongnaqu WWTP is as follows:
BOD5 120mg/L
CODcr 240 mgAL
SS 150 mg/L
NH3-N 30 mg/L
TP 4 mg/L
The effluent water quality is set according to Class II prescribed in " Integrated
Standard for Sewage Discharge" GB 8978-1996
BOD5 <,30mg/L
CODcr S 120 mg/L
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
SS •30 mg/L
NH3-N •25 mg/L
TP • 1.Omg/L
The pollutants to be discharged .can are calculated on the above data. (See Table 4-1 for
details).
Table 4-1 Pollutants Discharge Volume in Jiangdongna u WWTPFixed number of year by 2006-2010
planning
Projected sewage discharge 16(lOOOOt/d)
Original sewage CODcr 240water quality BOD5 120
(mg/l)effluent discharged CODcr 120
quality BOD5 30(mg/l)
Discharged volume CODcr 38.4of pollutants in BOD5 19.2original sewage
(tld)Discharged volume CODcr 19.4
of pollutants in BOD5 4.8discharged effluent
(t/d)
4.1 .2.2 The Mathematical Model and Verification
1. Mathematical model introduction
According to the full tide hydrology and watercourses characteristics and the
requirements of the department in charge of environmental protection on tail water discharged
from the outfall of the WWTP, the water flow and quality model of two-dimensional
non-constant flow is adopted. . As for the pollutants existing in the wastewater may influence
the basic movement of the flow, the answers can be extracted separately from vertical
two-dimensional flow field and pollutant concentration field.
1) Mathematical model of water flow
az a(Hu) a( Hv)_az + 0() + ay 0 (Formula 4-1)at ax ay
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
au uu au az wx +guat ax ay ax H C 2H (Formula 4-2)
a au) + a (£ auax ax ay y ay
av av av az WV- + -v -+ g- + u -- ±gv-
atu-ax ay +ay+fu- Hb +gv C 2H (Formula 4-3)a av) a avax )ax ay ay
among formula z tidy level, namely, distance between water surface and some
basic surface
u, v - vertical component of average flow rate in the direction of x,y respectively;
H the depth of water;
g - gravitational acceleration = 9.81 ns 2;
f Henseli parameter (f = 2o)V sin (p, (p --- latitude, (XJe ---rotary velocity):
C. Cosi coefficient
E x. E y -: Vortex diffusion coefficient of water flow in the direction of x,y
respectively
W ,WY- component of wind stress in the direction of x,y respectively;
x, y ,-ectangular coordinates;
t time.
The equation (4-1) is the sequence one of water. The equation (4-2), (4-3) is momentum
conservation in the direction of x, y respectively.
The primary condition of above pled equation is:
z(x, Y)I, = = z0 (x, y)
u(x,y)j = = u0 (X,Y)
v(x, Y)J,=O = v0 (X, y)
Boundary condition
Water boundary z(x,y,t) = z(x,y,t) stand for known value;
Land boundary V 0 0 Flow rate is zero in the direction of normal
Once having the above condition, it should obtain the answer of equation in the form of
disperse.. Using transvection abbreviations : (u, v) f uvdQ, to approximate the equation
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
by weighted remainder method (of which ,the second order term using partial integral ),time
aq n+ nderivative ] q ,taking former difference approximate : q = (qn+l q )/At,n as
time step number, A t as time step length (s)it can obtain
A
a(Hu)~ a(Hv)'A(z., ) + (~ )+ (~ d)=O (Formula 4-4)ax ay
-J1 az' 1GU g(u- +v u)" -)+ (U' + vj- I, ) + (g ax ,)+( 2
ax olxC 721{hi
AA IA A
w,- a au~cp a au a(P,Ifv/,(,t,) (H ,O)+- (E -)+- (Cy =0 (Formula 4-5)
H'"' ax Aa ax ay ~ay'ay
ovj, &1 / ) az+1 A g( u2 +V2 *v)1 -
+ (Ua +I v- , )(g C)+( )
_ A A ~ ~ ~~~~~A A
- ~~ji- a a"a a _<_+(fujl Qj)-(HWl+l Qj)+aa (£X ,a ')+aa (F, aaV' aQi)=o (Formula4-6)
H'"' ax 'a a'x ay~ -ay ay'
among formula , au shows a in facing flow unit Ti taking value, remaining
analogy , generalized variable
A A
q=q _j'j q q%cP
Adopting 3 computing nodes and triangle unit area coordinates ,using step function
identity and lumped mass concept can obtain its formal parameter easily .to substitute formula
(6.4)-(6.6)and by transposition, simplify to obtain part finite element equation to fit to
make formulas for computer program (omitted ). the condition of exact answer in equation
is:
Primary condition: Z (x,y,O)=Z ( "*" standing for value known, similarly hereinafter)
Boundary condition u(x,y,O)=v(x,y,O)=O
Boundary of water: Z(x,y,t)=Z*(x,y,t)
Boundary of land: Vn (x,y,t) = 0 (velocity of flow in the direction of
normal)
2) water quality model
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
The mathematical model of water quality regard the convection-diffusion equation of
non- invariableness as a basic equation. (2DH) :
aD aD aD r a aD a aD
at ax ay H x xH ay ay (Formula 4-7)
- K1 L+ f
Among formula : D is concentration of pollutants (mg/1), K1 attenuation coefficient,
L is CODmn concentration , f is source intensity
E, Ey are x,y swirly diffusion coefficient of water flow in the direction of x,y
respectively.
the condition of exact answer in equation is
Initial value : D (x,y,O)=D* (x,y,O) (* Known quantity
aDmargin value : boundary of land -= 0 n Is normal direction outside of the
an
boundary of land?
boundary of water : At influx computing field , D(x,y,t)=D* (x,y,t)
At outflux, without limit
: The obvious explicit facing flow finity element computing formula of similar current
momentum equation is adopted in the water quality model computing formal.
,'+'=D-t{u'> s +'l'+(FPPD+E,yP)` /4X2(Formula 4-8)
+KjJ }+f;
Usually stable condition Atimuch less than At2, current stable play the
role of control but for requirement of precision the gridding set is small in the
outfall of pollutants ,and the purpose is to describe the plane variations of the
concentrations of pollutants .As the lattice among computing field proceeds
in local encryption, the step length of computing time is strictly limited. After
calculation obtain Ati =6 second , At2=30 second, The total computing
field has 11050 units, 6231nodes , the least side length of lattice is
5m, river length is 47km, water area covers 14.8km20
2 Model verification
The model verification calculation consists of water flow verification and water quality
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
verification
1) Water flow verification:
The foundation of mathematical model except for selecting the rational computing
method, the more important thing is to verify the monitoring data and to make a basic
replaying through the computation of the mathematical model to the realistic variations of the
tide height, tidal current speed, tide volume in the monitoring stations. At the same time some
parameters have been rated such as resistance coefficient, the adjustment and extent of the
capacity of watercourses and oxygen consumption and double oxide coefficient and diffusion
coefficient and etc. therefore, verification is the foundation of mathematical model. During
the period of Seventh Five-Year Plan, a series of parameters were taken the rating
computation with the mathematical models, which have a comparative precision. The EA
conducts the verification of water flow again but due to the shortage of outlay, only the tide
height of three stations taken as objects of verification, i.e. Zhenhai, Ningbo, Chenglangyan.
See Table 4-land 4-3 for the results of verification of water level and velocity of flow.
The figure shows that the calculation value and monitoring value are inosculated well
and there is no phase difference; the maximum difference of calculation is 0.15m The
fluctuate tidal current data of near the main trough of Chenglangyan are appreciative with
actual monitoring results .It can be considered that the water flow verification is successful.
02 Water quality verification
The main source intensities of Yong River and Fenghua River collected at present
are gathered in table 3-21 and 3-22, the point is. here only the main pollution sources are
taklen into account but a quite number scattered pollution sources have not included in the
calculation. therefore, the foundation of waste water discharge volume in the verification
computing of the mathematical model is based on the data of sewage discharge volume and
making a certain range adjustment in consideration of the actual water consumption of
Ningbo .The result of COD.I, and DO can be seen in figure 4-4 .As the figure shown the
precision of the verification of water quality is lower than the verification of water flow .
This is caused by the chanciness of sampling and the inequality of the pollutants
concentrations along the vertical line of the section and the plane distribution of section. And
errors of testing and other factors.
So the requirement to the validating precision is not as strict as the requirement to the
water flow verification. However, verification computing reflects basically the variations of
actual monitored pollutant concentrations .the verifications of water flow and water quality
158
Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
show that the parameters selected for the models are rational and the computing methods are
reliable and it can simulate the nature variations and can be used for environment projection
and assessment of the project.
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Ningbo Jianodongnanqu WWTP & Sewerage Project EIA
~~~~~{~~~~~~~~Z~~ ~ (nii-I
4
3.5
3
2.5
2
1. 5 00
0 12 24 36 48 60 72 84 96 108 120 132D; l J (h)
U4L (m
315
3
2. 5
2
0 12 24 36 48 60 72 84 96 108 120 132Ut r1 (h)
j{r(m 1-: 'il E |IV t
3
2
10 12 24 36 48 60 72 84 96 108 120 132
U;tr fi- (h)
Figure 4-1 Neap Tide Height Verification Results
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- Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
WA (ni4 ,
3. 5
3o
2.5 0 0
1.5
114 20 26 32 38 44 50
U; Iij ( h)
)711 (nm3.5 T1ip
3
2. 5
2
1.5 0
10 12 24 36 48 60 72 84 96 108 120 132
H1ri'l1 (h)
47, (ir -f8tt I i-l-ClWA~~~~~~~ O-l4
3
2
10
014 26 38 50
HI[P1 (h)
Figure 4-2 Verification Result for Spring Tide Height
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- Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
fi~f (n) - 1~f4
3
2
8-2 6:00 8-2 12:00 8-2 18:00 8-3 0:00 8-3 6:00
1.5 5it-p-fe
0~~~~0. 5 / -A :00 8-2 12: !8-18:00 8-3 0: 3 6:00
-1oo
11 1111
7kSfl (ni -7k!1!4
3
2 0
1
8-4 6:00 8-4 12:00 8-4 18:00 8-5 0:00 8-5 6:00 8-5 12:00
H4igl ( h)
1. 5
1
0.5 5 /
0 8-4 6:00 8-4 12:00 8-5 0:00 8- :0 8- 5 12:00
-0.5 -I 'I(h
-1
Figure 4-3 Tide Height and Tidal Current Verification Results
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COD%,,,(n1g/1)
12.00 _ i ___
10.00 o
8.00
6.00
4.00 - .
20:00 0:00 4:00 8.00 12:00 16:00 20:00 0:00 1:00
COD,Mf(mg,f) ig/12.00 0 o p.,5ji
10.00 ' ,
8.00
6.00
4.00
20:00 0:00 4:00 8:00 12:00 16:00 20:00 0:00 4:00
COD1 ,n(mg-1)12.00 - 0
1 0.00
8.00
6.00
20:0 0.00 4:00 8:00 12:00 16:00 20:00 0.00 4 C
Figure 4-4 Background Water Quality Verification (CODm,,)
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- Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
0 00
.5.00 K
*~~~O0~ ~
0 00
20 00 0:00 4:00 8:00 12:00 16:00 20:00 0:00 4:00
0 D0,m4 ) [ -
I 004.00
4.00~~~~~~~~~~
3.00 .
2 001.00~~~~~~~
0.00..
20:00 0:00 4:00 8:00 12:00 16:00 20.00 0:00 4.00
Dom,(mgg/1)
6.00 I H
:4 00 0
3 oo
! (1 0-O,I!J18(I QQt .o ()15
t' G0 0:00 1:00 8:00 1200 16:00 20.00 0:O 4(0)
Figure 4-5 Background Water Quality Verification (DO)
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4.1.2.3 Impact Projection to Sewage Discharged into the River
1 Design Conditions
After the sewage with high concentration discharged into the river, the pollution
concentration began to change with the movement of water current, and the physical and
chemical mechanism indicates transfer, diffusion, dilution and self-cleaning. Its
concentration is related to hydrological situation. In term of the national criterion, the
impact assessment of water environment must be under the condition of design guarantee
rate of 80%-90% and its water quality still meets with certain standard. (Water quality
set in the function zoning). But for the samples taken for water verification, their
corresponding hydrographic condition often not able to reach the designed guarantee rate
due to various factors limited. Therefore such samples cannot be used for projection and
assessment directly, they must be discriminated before using.
As the tide rang variations of Yong River and Fenghua River has been aperiodically
monitored by water conservancy, shipping, and environment departments but without
systematical records. In the Seventh Five-Plan this issue was studied in details while carrying
out the national key study subject. Through calculation and analysis on the relations among
the tide rang in the sections of Zhaobao Hill of Zhenhai, Meixu and Sanjiangkou of
Ningbo .the mean flux of ebb tide of designed guarantee rates in each section can be
obtained, which is listed in Table 4-2.
Table 4-2 Ebb tide Flux of various guarantee rates in each section(m 3 Is)
Freqn Zhenhai Meixu Sanjiangkou
P=10% 1260 970 690
P=50% 820 640 460
P=90% 450 370 290
The hydrological condition of the up and down boundaries is under the control of tide
height so the tide range is the important parameter to scale the hydrologic guarantee rate.
Therefore the guarantee rate and frequency rate of tide range of Zhenhai station were
recoded .The tide ranges with frequency rate and guarantee rate of 10%and 90% are 2.8m and
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- Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
1.3m separately. The corresponding mean tide range in the hydrological situation of the
sampling is 1.4 m It is must be modified to reach the boundary tide level corresponding to the
tide range and then to be used for projection assessment.
1. Determination of computation schemes
The discharge amount of wastewater estimates at 160000m'/d after start up
of the project. So, in the process of determining the computation schemes used
for forecasting the water quality, it should clarify not only the impact of the
project itse].f on the background water quality of Fenghua River and Yong River,
i.e. not taking account other source intensities (but the current pollution
sources should be included), but also consider the superposition effects of other
pollution sources. There are many projects are building or waiting for buildi.ng
after EIA, so the principle of assessing the new and old pollution sources
intensity together should be followed to consider the superposition effects of
other project' s pollution source intensity.
According to criterion for EA, it is necessary to work out schemes based on the different
types of wastewater discharge, different sewage treatment degrees and different hydrologic
conditions, i.e. to make sachems according to the different conditions of spring and neat tides
including assessment of the impacts of the project itself and impacts of superposition source
intensity.
In the validating computation the current pollution source intensity in the area has been
taken into accounted and including the existing pollution sources of Yong River. Therefore,
the tracing back tide of downriver holds the pollutants discharged in the downriver.
Table 4-3 Computing Schemes Collection
Waste CODcTide water r BOD; Treatmen
N. type (m 3 /s) (mfu) (mg/1) t degree Remark
1 Spring 1.852 120 30 Secondar Overlapping
2 Spring 1.852 240 120 No Overlapping
3 Neap 1.852 120 30 Secondar Overlapping
4 Neap 1.852 240 120 No Superposition
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5 Spring 1.852 120 30 Secondar Singleness
6 Spring 1.852 240 120 No Singleness
7 Neap 1.852 120 30 Secondar Singleness
8 Neap 1.852 240 120 No Singleness
2, Analysis of computing result
The simulation calculation is conducted according to the computation scheme worked
out and through the computation of the twenty tidal cycles, the pollutant concentration has
basically reached the dynamic balance. Table 4-4 lists the maximum and mean enclosed
area for each computing scheme in different water quality standards The representative
schemes have been selected with their relevant the envelope curve for maximal and mean
value corresponding to various pollution concentrations drawing in figure 4-6 and 4-8(only
considering the schemes with superposition impacts). It is necessary to explain that the
envelope curve line and its area are obtained from the calculation of the area which is
enclosed by the link line to the points of maximum concentration value, but the maximal
value in Yong River and Fenghua River with to-and-fro current as the main current does not
take place simultaneously in up reaches and down reaches of the outfall so the actual area is
less than the area. But it indicates the situation may happen. . The analysis on the drawing
shows:
The calculation shows that no matter what kinds of capacity or tide types the waste water
through treatment is much better than the untreated one in quality It is about one time of
discrepancy for the maximal and mean values in different water quality targets shown in the
envelop curve line draw 4-6 and 4-8. Both the tables and drawings indicate that the untreated
water discharge into Fenghua Rive should be abandoned. Secondly from the different types of
tides, the computation results of schemes of 1 and 3, 2 and 4, 5 and 7,6 and 8 show the neat
tide is disadvantageous condition and the assessment should take neat tide for control but the
impact range of spring tide is larger and the concentration is lower.
2) The separated contribution of the project
The separated contribution of the project to the background water quality of Fungal
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River and Yong River must be clarified so as to make quantum control and provide scientific
basis in consideration of the allocation of the environment resources. Based on the principal
of sharing resources and rational allocation, the water environment resources should be used
reasonably.
In the period of the Seventh Five-Year Plan, the study subject "Pollutant Receiving
Ability of Yong River " conducted the distribution of pollutants amount in the large area of
Ningbo. Different sections while arranging the projects should verify this time the data. The
calculation shows that under the spring tide condition, normal discharge, the average COD
mn value increased is 3.26mg/l; under neap tide, average increased value 5.38mg/I. Without
treatment the average increased value of CODmn in neap and spring tide condition is
6.52mg/1, 10.8mg/l.separately.
Table 4-4 Results of Each Computation scheme (CODMn)
Scheme 1 2 3 4 5 6 7 8
Phase Phase Phase Phase Phase Phase Phase Phase Phase______ _____ 1 1 1 1 1 1 1 1
Treated Second Untrea Second Untrea Second Untrea Second Untreadegree ary ted ary ted ary ted ary ted
Tid type Spring Spring Neap Neap Spring Spring Neap Neap2mg/ **** 8*** **** **** 3.45 6.17 2.29 2.59
Mx4mgA1*** *** ** ** 0.0023 3.45 1.64 2.28Ma 6mg/1 4.43 ** ** *** 0.00 1.21 0.13 2.06
osed 8mg/ 0.36 3.08 1.80 2.57 0.00 0.0022 0.00 1.64
area lOmg/ 0.00 2.21 0.67 2.26 0.00 0.00 0.00 0.85
12mg/ 0.00 1.16 0.001 2.02 0.00 0.00 0.00 0.12_ _ 1 _ _ _
Maxconcentrati
on in the 9.75 14.40 12.2 18.80 4.23 8.46 7.11 14.20source area
Mea 2mg/ * 1.54 3.82 1.46 2.04n 4mg/ 0.00 1.54 0.39 1.46
encl 2.58 *** ** * 0.00 0.0031 0.00 0.96osed 8 0.10 1.62 0.92 1.94 0.00 0.00 0.00 0.38area lOmg/ 0.00 0.78 0.00 1.33 0.00 0.00 0.00 0.06
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M12mg 0.00 0.006 0.00 0.78 0.00 0.00 0.00 0.00
Meanconcentrati
on in the 8.80 12.6 9.88 15.9 3.26 6.52 5.38 10.8source area
(m g/,) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Note: I .the computation of schemes has considered the current status of source intensity;
2 . the mean value in the table means the space average of the point' s o f maximal
value happens;
3. In consideration of the overlapping intensities of current projects, projects have
been finished and projects have been assessed for building; 4 connect to the impacts
of other outfalls.
(3) To consider water environmental impact of the superposition effects:
On the basis of making clear the pollution contribution of the project itself, we consider
more to the water environmental influence after consideration of the superposition effects.
Because in the assessment area there are already some finished projects and ongoing projects,
it is necessary to consider the other projects' superposition pollution sources while
conducting the EIA. At the same time, it needs to have a certain forecast time while
considering these superposition sources. According to the studies on the existing literatures,
its boundary concentration value will have an increase of 10-15% to reflect the variations of
the water body in the general environment. The calculation shows that under the condition of
spring, the project with the capacity of 160000 t/d, the average value of full tide of CODmn
has not exceeded Class IV water body. In normal discharge condition, the average
concentrations of the source area is 8.80mg/L; but in neap condition. The average
concentrations of the source area are 9.88 mg/L. There is no pollutant value exceeding the
standard in the full tide maximal value. The maximal concentration in the source area is 12.2
g/ l; but the direct discharge without treatment in the condition of spring , the area exceeded
Class IV water body is 0.78 km2 ,and the average maximal concentration is 12.6mg/L;
And that under neap tides average area exceeded the standard is 1.33 km2 and the maximum
concentration in the source area is 15.9mg/L;
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Therefore, the analysis on the result of calculation shows that after the start up of the
project, CODmn in Fenghua River will not exceed Class IV water body standard but will be
near the critical point. The main reasons are: firstly, the dilution condition is bad in the section.
which the outfall of the WWTP located; secondly, there is more ongoing project so the
background value of the river is too high.
(4) The difference between treated or untreated impacts on the environment
The calculation shows that in case of the sewage discharged directly into Fenghua
River in the condition of spring tide , the maximal concentration in the source area is
4-5mg/L higher than normal discharge , and the area exceeded the standard is 0.78 km2
Simi ar y under the condition of neap tide, the maxima concentration in the
source area is 6mg/ higher that the norma discharge. This indicates that
it has very ig impact on Fenghua River if the sewage is discharged direct y
without treatment.
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3 410
_4 _
4 60
I .S~~~~~~~~~~~~
6 40
5 40
Figure -6a Full tide maximal increment isoline of CODMn in normal discharge andneap condition
( 260 20
468020 111u1A I
4 40
Figure 4-6b Full tide average increment isoline of CODmn in normal discharge and neap
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condition
7
1 2102
Figure 4-7a Full tide accident isoline of CODMn in accidental discharge and neap
Figure 4-7b Full tide average increment isoline of CODMn in accidental discharge and172
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neap condition
1<~~~~~~~~1
11
Drawing 4-8a Full tide maximal isoline of CODm,, in normal discharge &neap
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Figure 4-8b Full tide average isoline of CODMn in normal discharge and neap condition
4.1.2.4 'Water Quality Improvement in lower reaches of the river projectionafter the WWTP completed
1.Brief introduction to the projection mode
The box model is adopted to project the improvement of water quality after sewage
interception. The concept of complete mixed reactor is adopted; substantially it is to give the
simultaneous solution of balance equation of quantity of water balance and equation of
pollutant quality balance. Given cubage of reactor as v, in the time section dt the influx and
flux from the reactor is Qin and Qout separately then the quantity of water balance equation
of the reactor and pollutant quality balance equation are:
Q - Q = dV (Formula 4-9)
Q inC,,, -Q.,,, -KVC= d(CV) (Formula 4-10)
dt
Among formula : Cin is influx pollutant concentrations of reactor (mg/L); Cout is flux
concentration of reactor (mg/L), C is the pollutant concentrations in the reactor (mg/L), K is
degradation coefficient (1/d) 0
According to the concept of complete mixed reactor ,suppose as soon so the pollutant
enters into the reactor it is mixed completely ,hence C=Cou, Hereby unite formula (6.8)and
(6.9) to obtain:
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Ningbo Jiangdongnanqu WWTP & Sewerage P roject EIA
PCp
QinCin / QoutCout
Figure 6-8 Box model
Qi,, (Cir, - C) - KVC = V dC (Formula 4-1 1)- C) ~~~dt
above formula (6.10) analytic solution
in invariableness condition
C = C = I+Tk (Formula 4-12)
Among formula Ce is balance concentration, T=Q/V is the process time of the
pollutants in the reactor (d)
In variableness:
C = Cc + (C0 - Cc)e 7 (Formula 4-13)
Among formula Co is the concentrations in the reactor at the initial time (mg/L),
Due to the reduction of the main pollution load, the balance concentration Ce is reduced
too to reach a certain standard water quality. It needs to explain that the influx to the reactor
includes sewage; drawing water of waters nearby a flux includes current and storm water
runoff. .
The above calculation can be taken to verify the mean value of the whole water area and
project after sewage treatment .As to the space distribution can be ascertained by the
hypothesis of invariable special value of monitoring value and mean value.
2.Mode Verification and effects of Sewage Interception Ana ysis
Before the projection of the effects of sewage interception, the verification with the
above box model to the water quality of the outfall---Sanjiangkou, Ningbo and outside should
be conducted and the parameters should be rated. Table 6-11 shows the main source intensity
discharged into Fenghua River. According to the characters of Fenghua River and its
pollution load, the theory of box model is used to the calculation with the consideration of the
rainfall run-off of the drainage area and the coming water from the other waters, pollution
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
concentrations and water quantity and degradation coefficients can be used in the water area.
Through calculation, the balance concentration of CODMn is 5.41mg/L, which is close to the
mean value of 5.0mg/L for many years in the past. The error rate is within 10.0%. which
proves the reliability of the box model.
The projection results made by the box model show that in 2010 . before sewage
interception the mean value of CODmn in the section of Sanjiangkou , Ningbo is 7.7mg/L
for many years ; after sewage interception , COD mn is reduced to 2.1mg/L and the reduction
outside of the EIA area is 0.2 -0.5mg/L. The water quality of Fenghua River can be
improved from Class IV to Class III, and the effect is obvious.
4.1.2.5 Main Conclusion
Through the computation and analysis by the mathematical model to different operating
modes of discharge of Jiangdongnanqu WWTP, the following conclusion is obtained:
1. In the condition under the control of neap tide, the area for mean
value of COD exceeded Class IV is 1.39 km if without sewage treatment, and
such discharge should be forbidden for it is far from the allowable standard.
2. Under the normal discharge operating mode, the mean value of CODM, In the condition
of spring tide and neap tide does not exceed the standard of the water body of Class IV, but
the mean maximal concentration in the source area under the neap condition reaches
9.88mgA/.
3. The computation shows that after the completion of the WWTP the mean value of
CODM, in many years from the outfall in the section of Sanjiangkou can be reduced to
2. lrng/L and in the outside of the assessment area the value can be reduced to 0.2-0.5mg/L;
the effect is evident.
4. The submerge discharge type should be adopted in the outfall .The discharge at the
bank should be forbidden for the less velocity of flow, depth and dilution effect of current at
the bank to protect the environment. .
4.1.2.6 Surface Water Pollution and Measures for Prevention and Abatement
1. The projection results show that the after the effluent of Jiangdongnanqu WWTP
discharged into Fenghua River, the average maximal concentrations in the source area have
reached 9.88mg/1 which are close to 10mg/i ,the standard limit of the water body of class IV,
so it is necessary to control the discharge volume and sewage treatment degree.
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA2. Separation of storm water and sewage in the plant area.
3. Concerned departments should strengthen the supervision and monitoring to the key
pollution sources in the service areas ,and supervise and urge the enterprises to enhance the
renovation of the environment to the key pollution sources and strengthen the maintenance
and management to the pollution control facilities to improve the operation efficiency so
as to make the sewage in the service area enters into the municipal sewerage system reach the
influence standard of the WWTP and "Standard for the quality of the Sewage Discharged
into the Municipal Sewer" CJ3082-1999.
4. The submerge type discharge should be adopted and the outfall should be extended
and bank discharge should be forbidden.
5. Ensure the security of water - route and pipes at the bottom of the river. The
following measures should be taken: 1. Set up navigation marks; 2. Outfall extended length
should not affect the navigation; 3. Set up anchor dropping marks to protect the pipes at the
bottom of the river.
6. The projection results show that the accidental discharge will seriously affect the
water quality of Fenghua River, so it must be take strict precautions against accidental
discharge.
4.2 Impact on ambient air projection and prevention and
abatement measures
4.2.1 . Impact on ambient air and prevention and abatement
measures in the construction stage
4.2.1.1 Impact on ambient air
The air pollutants generated during the construction period mainly come from dust
caused by loading ,unloading and stacking of construction materials such as cement and
sand ,and earthwork excavation ,dust caused by transportation vehicles ,exhaust gas and
earth dropped on roads .The main pollution factors : NO2 . CO dust and etc. .
Based on the project capacity and compared with the similar projects, the pollutants
emission amount in exhaust gas is shown on Table 4-5, which is calculated on 20 vehicles a
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
day.
Table 4-5 Estimation of exhausts Gas from the construction vehicles
in the construction stage
Pollutant SO2 NO2 Hydrocarbon CO l
emission ( kg/d ) 0.45 5.20 0.64 3.89
The source intensity is low according to analogy investigation and the dusting caused by
transportation of building materials mainly concentrated around the construction site .57% of
the total dust generated is within lOOm of the project site.
The dust generated in the construction site will affect the people living in nearby villages
and dust generated by sewerage network construction, roads excavation will also affect the
residents nearby.
4.2.1.2 Prevention and mitigating measures for ambient air pollution
1 Enclose the construction sites to avoid gravel and waste residue generated
from the construction entering into the surrounding villages and watercourses.
2. Carefully loading and unloading the construction materials in the constriction site 1.:
Try to reduce the area of stacks for sand, carpolite and cement and sprinkle water on the
materials to prevent dusting.
3. Try to clean the mud and earth before the vehicles leaving the construction site,
sprinkle water on passing roads by the various vehicles at fixed time.
4 Carry away the abandoned earth in time when conducts excavation for the
construction of sewage pipe network , for temporary store ,the earth should be stored far from
the housing .
5. Cover sand and gravel ,cement ,residue earth while transporting to prevent dusting..
4.2.2 Ambient Air Environmental Impact and Measures for
Prevention and Abatement in the Stage of Operation
4.2.2.1 Effluvium environmental impact and measures for prevention and178
Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
abatement
1. Effluvium environmental impact
Japan began to implement "Effluvium Protection Rules" in may 1972. The
survey results show that odor is regarded as the ruller to measure the harm grade.
So effluvium standards is devided into six classes. See it in table 4-6.
A 4-6 classification of odor intensity
Odorintensity 0 1 2 3 4 5(grade)
A little Slight
No odor odor Easily Strong Intensitivenotation (threshold (threshold easiy Str nt oi
odor of of perception odor odor
detectability) maintain)
Moreover, the odor intensity is related with its density. "Effluvium Protection
Rules" combine with the above two factors to notate the limited standards of the odor
intensity. The data caculated by induction show that the relationship between intensity and
dense of the effluvium meet the rule of Webster:
Y=klg (22.4 - X/Mr)+ a (1)
5 r Y odor intensity (average)
X mass density of effluvium, mg/mi3
k, a constant
Mr-effluvium pollutants molecular weight
According to the monitoring results shown in table 4-7, the density of ammonia is
highest, then is hydrosulfate. The odor intensity of methyl sulfate alcohol is the higest, and
hydrosulfate is the second(whose odor intensity reaches the intensive grade). It builds founder
for the effluvium controlling process and machine designing.
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
Table 4-7 Result of effluvium accessmentQuality The relationship between Odor
classification matuiu mass effluvium quality mass andmatter ( mg/m3 ) odor intensity intensity
ethylal No Y=1.Ollg(22.4.X/Mr)+3.85oxide propylaidehyde No Y=1.771g(22.4.X/Mr)+3.86
Acetic acid No Y=1.771g(22.4.X/Mr)+4.45Propionic acid No Y=1.461g(22.4.X/Mr)+5.03hydrosulfate 3.64 Y=0.9501g(22.4.X/Mr)+4.14 4.5
methyl sulfate 0.214 Y=1.251g(22.4.X/Mr)+5.99 4.7alcohol
sulfated methyl sulfate 0.415 Y=0.7841g(22.4.X/Mr)+4.06 3.2ether
Dimethyl 0.008 Y=0.985lg(22.4.X/Mr)+4.51 1.9disulfateammonia 4.86 Y=1.671g(22.4.X/Mr)+2.38 3.2
nitride Trimethyl 0.008 Y=0.9Ollg(22.4.X/Mr)+4.56 2.0_ _ _ _ _ _ _ _ _ _a m in e I__ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Chinese "Effluvium Pollutants Emission Standards" (GB 14554-93) limit the
typical effluvium pollutants. Accoring to the standard, lots of WWTP monitore
the odor- produced themselves. the results are shown in tahle 4-8, 4-9, 4-100
Table 4-8 monitorin result of Tianjin Jizhaungzi WWTPmethyl
Source hydrosulfate(mg/m3) ammonia(mg/m3) sulfate Odorpoint ~rsa~~m amna~n,m alcohol density
(mgm 3)
Generalaeration 0.222 0.479 0.084 570
basinSludge 30.95 0.312 0.347 6500basin
Contract 52.72 0.475 0.498 20000tank _ _ _ _ _
Trick 0.45 4.7grid50m 0.30 4.1
toword
owom 0.07 3.5toword
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150m | | 2.6toword 00 .
Q 4-9 monitoring results of Handan East Rural WWTP
Inlet of Outlet ~~~Ambient AmbientSource Inlet of Outlet Grid Sedimentation Contract thin 10mpoint tank tank chamber tank tank grid outside
basin the plantOdorOdensiy 760 110 760 1200 1100 2.8 1.5
densityIIII
* 4-10 monitoring results of Gaobeidian WWTP
Sludge Sludge 50m Outside 100m Outside AmbientSource contract dewatering the sludge the sludge outsidepoint conrc dewae dewatering dewatering thehouse house
house house plant
density 43 173 6.5 1.5 < 1.5
We draw the conclusion by analysis:
(1) The effluvium source point of WWTPis sludge storage tank, sludge contract tank,
sludge dewatering house, aeration basin and grid chamber well.
(2) The main component of WWTP odor is hydrosulfate, ammonia, methyl sulfate
alcohol(All of them are pollutants in Chinese "Effluvium emission protection
Rule" )whose density exceed the standards. So it is belong to controlling target.
(3) Oder density decrease following the increasment of effluvium spreading distance.
The effect is slight outside of 00m and there is no affect far from the effluvium
source.
(4) The oder intensity is different since varity of sewage treatment process. For
example, the process with long sludge age produce less oder density than that
with short sludge age.
(5) Measures for prevention and abatement the effluvium in those effected area must
adopt to ensure discharging reach the standards and improve the environmental
quality.
Otherwise, because there are matters such as hydrosulfate, ammonia, methyl sulfate
alcohol in the oder of WWTP, it is happen to some risk. For example, Tianjin Jizhuangzi
WWTP happened the accident of hydrosulfate leaking when repairing the
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valve of flash well. Five people died and three people were poisoned.
4.2.2.2 Sanitary Protective Distance
1) Analogy Survey
The main elements of the effluvium from the WWTP are composed of ammonia,
sulfureted hydrogen, methyl hydrosulfide, methyl ethersulfide, trimethylamine, and
etc. Compared with the landfill and fecal matter treatment plant, the effluvium of municipal
wastewater treatment plant is rather weaker. According to the provisions of the standard, the
intensity of effluvium is divided into six grades. Grade 0 represents odorless; grade I
represents odor which is hard to be felt (apperceive threshold value); grade 2 represents weak
odor can be felt (cognize threshold value); grade 3 is obvious odor to be felt; grade 4 or 5 has
strong foul smell, which is unbearable for human being. Due to time limit we have not
organize persons to monitoring but we made a survey and consultation while we made the
analogy investigation to the similar WWTPs. There is little plant having foul smell at grade 4
or 5; generally the effluvium intensity in most of the wastewater treatment plants is grade 3. It
is also known that the effluvium is weak and acceptable at the points 80 meters away from the
wastewater treatment plant. That is the protective distance obtained through the investigation
and consultation.
2) Ascertained by computation
The sanitary protective distance is the minimum distance from the boundary of the
pollutants generated department (workshop or section) to the boundary of the residential
area.
Based on the provisions of "Technical Measures for Establishment of Local
Air Pollutants Emission Standard" (GB/T13201-91) issued in 1991, by the
National Technical Supervision Admi.nistration and the National Environment
Protection Bureau, the sanitary protective distance of the unorganized emission
of the project can be calculated with the fol.lowing formul]a:
V = I (BLC +0.25r2)Y5L"C,, A
Among formula : Qc-Pollutant amount of the unorganized emission , kg/h;
Cm-Standard concentration limit value , mg/mi3
182
Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAL---Protective distance needed , m;
R-Equivalent radium of unorganized emission., m:
A, B, C) D-coefficients , obtained from the table
When L 1OOOm, A=470, B=0.021, C=1.85, D=0.84, the average wind speed
in the recent 5 years is 2.9m/s.. The sanitary protective distance of NH3 and H2S of
the project is shown in table 4-1 1
Table 4-11 Calculation of the Sanitary Protective Distance
Pollutants NH3Pollution source intensity 5.33
(kg/h)Maximal allowable 0.2concentration in the
residential area (mg/m 3)Sanitary protective 264
distance
In consideration intensify foul smell in summer and sensitivity levels of different
People, the protective distance is determined according to the standard accepted by the
human sensory organ. The best way to avoid foul smell is to set a protective distance. Though
the WWTP is located at the area where class 2 of the foul smell strength is allowed by air
environment plan, in order to provide people with better air environmental quality, the
protective distance for the project is put forward In the western side of the Jiangdongnaqu
WWTP the foul smell transmits to 300m or farther in low air pressure time, so it is proposed
to set 300m as protective distance.
Ambient Air Pollution Protection and Mitigating Measures
Deodorization can takes the measures such as adsorption assimilation, incineration,
catalyzing burning, chemical oxidation an biological treatment The biological measure
developments very fast because it has many advantages such as simple process, small
investment, lower operation cost, easier maintenance, effective and etc.
According to the sanitary protective distance, the affected range of the effluvium is
within 300 m around the WWTP. It is recommended that the tall plant to be grown in the four
sides of the plant green belt.
The centralized residential area is forbidden to build within the range of protective
distance. The exiting village located in the protective area should be relocated.
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Wangchuan pumping station and Qiubi puping station are near the residential area of the
villagers,so the odour generated from the sewage will produce some affect on the surrounding
area. The construction unit should try to acquire more land and the location of the pump
house should be built in leeward of the village far from the residential area . The facilities of
the pumping house should be seted in the room . At the same time large trees should be
planted around the pumping stations to reduce impact of odour on villager' s living
environment . It is suggested that the concerned departments carefully prepare the planning of
the surrouding area make the pumping construction site far from the residential area .
4.3 Acoustic environmental impact projection and
measures for prevention and abatement
4.3.1 Acoustic environmental impact and mitigation measures
4.3.1.1 Acoustic environmental impact analysis
Except for transport vehicles, the noise of construction machinery can be regarded as
fixed sound sources. Table 4-12 provides the actual monitoring value of various construction
machines.
Table 4-12 Noise of the Main Construction Noise unit: LMAX (dB)
DistanceDistance between Maxim
Type of between Maxima Type of monitorin al
machinery monitoring I machinery g point soundpoints and level andlelmachinery machiner
CementBulldozer 5m 86 feeding 5m 79
pump
Loading 5m 90 Vibratory 5m 79machine stick
Grader 5m 90 Cocet 5m 74mixer
Road roller 5m 76 Cutting 5m 93184___ _ _machine
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Grab 5m 84 Electric saw lm 103Pile driver Crane 15m 73
( vibrating 15m 90 Elevator 30m 58ex tracto r) I__ _ __ _ _ I__ _ _ I__ _ _ _ _ I__ _ _ _ _ _ _ _
We take the noise of construction machinery as point source of sound, without
considering other elements; the projection model is as follows:
The geometric radiation noise pattern with non-directional property sources of sound is
adopted for the projection model in the construction stage.
LA (R) = L,, - 20logR - K - A,
among formnula: LA--propagation sound pressure level of the monitoring point
Rm from the sound source ,dB (A);
L, acoustic power level of acoustic source ,dB;
K---Geometric divergent factor takes 8 when propagation space is half free
field and 11 in full free field :
A,.--Sound level attenuation caused by shelters on noise propagation
path ,dB;
R Beeline distance from monitoring point to sound source m.
According to GB12523-90, through calculation the attenuation distances to reach the
limit value of construction site boundary noise of the construction machines are shown in
table 4-13.
Table 4-13 Attenuation Distances of Boundary Noise of VariousConstruction Machines to Reach the Standard
Demand attenuation
No Type of Machinery distance ( m )
Daytime Night time
1 Bulldozer 17.7 1772 Loading machine 28.0 2813 Grader 28.0 2814 Road roller 5.6 56.15 Grab 14.1 140
Pile driver ( vibrating 26.7 Forbidden
extractor )
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7 Cement feeding pump 14.1 79.28 Vibrating stick 14.1 79.29 Concrete mixer 7.9 44.6
10 Cutting machine 70.6 39711 Electric saw 44.7 25112 Crane 37.7 11913 Elevator 13.4 42.4
In the south of the construction site there is a village, lingia Village . The
construction noise can affect people there in a certain degree. . The site of
sewerage network construction is close to the residential housing, so the
residents will be affected by ground excavation by bulldozer and loading machines
and etc. in construction stage.
4.3.1.2 Acoustic environmental pollution and mitigation measures
1 The construction machines and construction processes with lower noises
should be used like static pressure driven pile or drilling affusion pile
instead of' the ones with high noise such as, the striking driven pile and the
use of self-provided generator should be controlled strictly.
2, When bulldozers ,grabs disintegrators and other loading and unloading vehicles pass
in and out the construction site , their speed should be limited and maintenance of the
equipment and vehicles should be strengthened to keep them in good condition.
3. Arrange the time limit for work reasonably to avoid the noise of the machines place
influences on the residents continually.
4 The noise pollution construction work, which will affect the residents, will be
forbidden after 22:00 PM. If the special need for conducting the noise pollution operation
at night, the application form should be filled in advance and submitted to the
administration department for approval. The operation can be conducted only after the
" License for Night Operation" obtained and the operation should be carried out
according to the requirements of the license.
4.3.2 The impacts on acoustic environment186
Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
and mitigation measures
4.3.2.1 Source intensity of noise
Based on the engineering analysis, the main noise sources of the WWTP are sewage
pump, mud pump, dehydrating machine, blower and etc. (see table 4-14 for details)
Table 4-14 Noise from the main equipment of the WWTP
Equipment Pump Electromotor BlowerNoise dB 85-95 75-85 95-100
The drainage pump of the pumping station to be built will be installed about 4-7m
underground from the surface. When the monitoring is conducted, the monitoring instrument
is set in the side of iron bars 4-7 m from the pump. The source intensity of each drainage
pump is shown in table 4-15.
Table 4-15 Monitoring Results of Noise of Sewage Pumping Stations
Pumping Wudongzha pumping station Ningbo middle schoolstation pumping station
Type of pump 4 8PWL vertical centrifugal 4 ZLB1.4-7.2pump 2 250WDL
Noise 80.1 80.7
4.3.2.2 Noise impact projection of the WWTP
The main noise pollution sources are the sewage pump, mud pump, circumfluence mud
pump and blower, these machines are mainly in pump house, dehydrating house and
circumfluence and blower houses, so the projection will be made mainly on the above
mentioned equipment.
1) Projection mode
The projection mode is adopted the noise projection software made by Loud Technical
Company of Germany.
We have conducted monitoring to the noise of Cixi WWTP. The monitoring results show
that in the pump house the noise of Leq is 87.8-90.1dB, average 88.7 dB; I m outside of the
pump house Leq is 78.9dB. Sound insulation of wall of the workshop is 10 dB. Therefore,
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
according to the above monitoring results, the sound insulation volume of the wall for the
project will adopt 10 dB, The blower have been taken measures to reduce noise by sound
insulation.
2) Projection results
The projection results show that in the operation time the noise in the east boundary of
the plant is 48.4dB,south 38.2dB,west 41.7dB,north 34.3dB.The plant boundary noise can
meet the requirements for the function zone. At the same time in the WWTP there is some
noise generated by sewage flowing into the pond, this impact is limited under the standard of
function zone.
4.3.2.3 Noise impact analysis on sewage pumping station
The monitoring results to Ningzhong pumping station, Wudongzha pumping
station and South Beltway pumping station show the environment noise of each
station is comply with class 4 standard of "Urban Area Environmental Noise
Stanclard" in daytime, hut it goes heyoncd the standard at night. This is caused
hy noise of pumping and water draining. After completion of the project, more
pumps and equipment will be adcled, so the noise value will he increased .The
impacts mainly are generated at night.
4.3.2.4 Noise Mitigation Measure
l. Sound insulation measures should be taken to the blower and pump house
in the WWTP to setup vibrating insulating cushion, noise elimination elbows,
sound absorbing materials on the walls of pump house.
2. Build double deck windows and close the windows of the pumping house while
operating and using sound absorbing fitment in the pump house.
3.As Wangchun pumping station and Choubi pumping station are near the residential
area of the village ,the constrution unit should aquire more land and try to set the sewage
pums and generator unit far from the residential area of the village and install under the
ground and use vibrate separator noise elimination elbow to avoid the noise of pumping house
affect villagers .
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4.4 Solid wastes environmental impact anal ysis and
mitigation measures
4.4.1. Solid wastes environment in the construction stage and
mitigation measures
4.4.1.1 Solid wastes impact analysis in the construction stage
It is estimated that the construction garbage to be generated in the construction period is
about 9843.1 tons; abandon earth 53620 m3 In addition, there is a certain amount of domestic
garbage.
The construction garbage should be handled in time; otherwise, it will not only influence
the sights but can cause dusting in windy and dry weather. If the domestic garbage cannot
be handled in time, it may grow mosquitoes, emit foul smell and spread diseases to place
negative impacts on the environment.
4.4.1.2 Mitigation Measure for Solid Wastes Generated in the ConstructionStage
1. Stack field should be far from the residential area and located in the leeward of the
villages to prevent foul smell influence the living environment of the residents.
2. The bounding wall should be build around the abandoned earth stack field and catch
drain should be build around the side to ensure the smooth drainage to avoid overflow in
raining season at the same time, drain the leakage of sludge by the catch drain to prevent
sewage overflow.
3. Sludge may produce dusting after dry so the earth stacks should be sprinkled at fixed
time to prevent dusting.
4. In order to prevent water and soil erosion attention should be given to cultivate
vegetation after abandoned earth backfilled.
5. The construction party should contact with the local departments in charge residues
the transport construction garbage and excavated earth out of the site in time and the earth
will be used to make bricks and for backfill earth. The living garbage of the builders will be
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collected to trust the sanitary department to handle.
4.4.2. Solid wastes impact in the operation stage and
mitigation measures
4.4.2.1 Solid wastes output in the operation stage
C The solid wastes include mainly sludge and dregs from coarse and fine grid screens,
sedimentation tanks. dewatering machines. According to the FSR of the project the dregs of
screen output is 1.6t/d with water content of 55%-60%. Dehydrated sludge output is 240t/d
with water content rate of •80% ; Sinking sand output is 3.2t/d; domestic garbage output is
0.lt/d. According to sampling did by the Environmental Sanitation Division of the city to
the garbage of two typical residential areas (Huangli and Mayuan) the organic elements of the
domestic garbage of our city accounts for 40.08% and inorganic elements accounts for
57.84%, the rest accounts for 2.08%.
4.4.2.2 Solid Wastes Impacts Analysis in the Operation Stage
The solid wastes include mainly dregs from the grid screen, sedimentation tanks,
dehydrated sludge, domestic garbage. debris of microorganism and decomposed matters and
some are fragmented remains of dead animals and plants. These matters will be putrefied
under certain temperature and humidity, especially in hot weather .The dehydrated sludge
caused serious affects on the environment The main characteristics are as follows:
I-ligh water contain rate (•80%), easy to be washed away
Fine greasy particulates with low water permeability
Easy to become breed places for mosquitoes and flies and spreading
sources for diseases;
Easy to generate leach water to pollute surface water and ground water;
Main impacts on environment of solid wastes generated by the project in
operation stage are as follows:
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1. Impacts on Air Environment
The mail impacts of solid wastes on air environment include the impacts on
ambient air of WWTP caused by sludge dewatering and stacking and impacts ambient
air on the way due to solid wastes transportation.
The pollution caused by sludge dewatering and stacking mainly is foul
smell and its extent is related the time for stockpiling of dehydrated sludge . The
longer time for stockpile take, the stronger foul smell it has.
The impact of solid wastes transport mainly is the odor, exhaust gases and
dusting on the ambient air on the way.
2. Impacts on surface water and ground water
Dehydrated sludge has low water permeability and it becomes slurry after
soaking, which is easy to washed off. Especially when it is caught in rain, the
sludge and leach water flows with rain to the surface water to cause pollution.
The leach and dissolubility elements in the sludge permeate into underground
so as to cause ground water pollution. According to the analysis to the sewage
composing in the project area, industrial sewage accounts for over 50% of the
total in the service area of Jiangtongnanqu WWTP. It is estimated that the
proportion industrial sewage volume will be increased .The industrial sewage
contains more heavy metals, so does the sludge. When heavy metals enter into
the ambience, the cumulative effects will be caused.
3. Impacts on Sanitation
Dehydrated sludge mainly consists of microorganism remains and decomposed matters,
which contain various pathogens and intermediates devoting abnormal matters. Mosquitoes,
flies and water sources to harm the human body will spread these matters.
4.4.2.3 Mitigation measures for impact of solid wastes in the operation stage
Land filling is a method adopted by most of the domestic WWTPs while treating
dehydrated sludge. It is easy to operate and has less secondary pollution, but the
precondition is the land filling must meet the criterions for sanitary landfill. The sludge of
Jiangdongnanqu WWTP will be stored temporarily in the sludge shed (with raining
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Ningbo Jiangdongnanqu WWTP & Seweraoe Project EIA
and leaking preventing measures to be taken). And then transport to landfill
site for sanitary landfill.
At present, there is only one garbage dump and landfill in Fengling. Fengling garbage
dump is a garbage incineration plant .The landfill is used for land filling the ash and dregs of
the domestic garbage after incinerated. Ash landfill capacity is 130X 104m3 The sludge of
the project will be land filled in Fenglin landfill site for 3 years temporarily .The new landfill
site is in the stage of site selection. The sludge disposal will be in the new landfill site after it
is completed.
In order to prevent the exploding caused by anaerobic digestion, in the process of landfill
the sludge should be filled with domestic garbage and with more vent-pipes.
The domestic garbage will be in charge by specific persons for collection and the
sanitation department to the landfill site for centralized disposal will transport it.
Strictly prevent the domestic garbage, sludge, wash water from the sludge treatment
facilities and wash water of ground to flow into the surface water to cause water environment
pollution.
The impact of solid waste on the environment will be reduced after above disposal,
4.5 Impacts on Social Environment Analysis and
Mitigation Measures
4.5.1 Social environment impacts in the construction stage and
mitigation measures
4.5.1.1 Impacts of Land acquisition and resettlement analysis
The project is located in the southern part of the city where mainly is farmland so the less
housing to be dismantaled . According to "Resettlement Plan for Ningbo Jiangdongna
WWTP and Sewerage" the land acquisition of the project is 170 Chinese Mu ,which belongs
to Linjia village ,ZhonggongmiaoTown,Yinzhou District .The households of 83 will be
192
Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAaffected The total affected people are 267,of whom ,165 are labour force . The total land
temporarly used by the project is 126000m2(189 Chinese Mu).97 houses in the village will
be dismantled ,with a total area of 9552 m2 and affected people 314.
1. Permanence and temporary land aquisition
The land acquisition of Jiangdongnanqu WWTP is 170 Chinese Mu. It should affects
Linjia Village, Zhonggongmiao Town,Yin County which located in the southen part of
Ningbo Rural. Linjia Village is far from 5km to Ningbo City. All village people have changed
their ID into Ningbo City. Land in Linjia Village has not been contracted to its people when
the third land undertaking. Now there are no crops in those areas. The total affected lands
temporary used laying sewerage network are 126000m2.
Tabel 4-16 Jiangdongnanqu WWTP and sewerage project land acquisition both
permanence and remporary
Permnence land Temporary landcounty (district) town village acquisition acquisition
Linj iaYin County Zhonggongmiao Town Village 170
County Land 189Total 170 189
2.dismantled house
97 houses in Linjia Village, Zhonggongmiao Town,Yin County have been
dismantled with a total area of 6552m2,include RC structure houses 1767m2, BC structure
houses 3391m2, BW structure houses 1624m2, facility structure houses 2770m2 and other
houseing attechment. See table 4-12 for detail. In the dismantled houses, the area of 93
percent is more than 45m2 and the other 7 percent is not. It is shown in table 4-16,4-17.
Table4-17 the house and attechment affected by the JiangdongnanquWWTP and sewerage
item unit amountRC structure m2 1767
Build area of BC structure m2 3391dismantled BW structure m2 1624
house Facility structure m 2770
totle m2 9552
Concrete level ground m 2 2700
Cowshed piggery etc. m2 300
attechment Build wall m2 1800phone set 60
Cable TV household 90
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Table 4-18 stastics area affected by the projectHouse area (m 2 ) household ratio people ratio Total area (mi) ratio
House area<20 0 0% 0 0% 0 0%
20<House area 5% 5 2% 110.37 1%<30
30<House area 2 2% 3 1% 83.44 1%<45
I]\ i-l 7 7% 8 3% 193.81 2%
45<House area 13 13% 32 10% 671.53 7%<65
House area _ 65 77 80% 274 87% 8686.66 91%
Totle 97 100% 314 100% 9552 100%
3.affected population97 houses in the village will be dismantled, with affected people 314,
of whom, 165 are labor force.Table 4-19 affected population by Jiangdongnanqu WWTP and
sewerage unit: household, peopleAffected type
household 83
Land acquisition population 267Labor force 165
dismantle Of whom: household 97population 340household 97population 314
Of whom: Labor force 165
4, Affected tender population
In the process of public consultant, There are 7 poor households whose house area is
less than 45m2 in those dismantled village people.
5, affected ground attachment
Eight items of those affected ground attachment are shown in table 4-17 l
Table 4-20 Ground attachment and public facility affected byJiangdongnanqu WWTP
item unit number
WC I 2
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
item unit number
I OKV wire pole 1 6380V wire pole 1 10
transformer set 1
trench M2 200Road for ploughing amnchine M2 180
Plastic shed M2 2668
Large trees >five years 1 70
Young tree <three years 1 140
The total costs of the relocation and resettiment of is RMB 30.412 which will include
the total cost of the project .See 4-11 for detail .
Table 4-21 Budge ar estimate of the resettlemt costs of the projectItem unit amountCompensation standard (Yun/unit)Cost (lOOOOyun)
I Permanence land 170 111423 1894.19acquisition
land Mu 170 44000 748.00compensation
resettlementsubsidy Mu 170 20000 340.00
young crops Mu 170 1000 17.00compensition Mu_170______17_00
Tax on land Mu 170 6670 113.39occupation
land reclaim Mu 170 12006 204.10fee
waterconservancy Mu 170 400 6.80fund
landacquisition Mu 170 3602 61.23management
fee for newconstruction Mu 170 21344 362.85land withpayment
contingency Mu 170 2401 40.82II Relocated 9552 610.23residents housing 9
RC structue m2 1767 845 149.31housing
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
Item unit amountCompensation standard (Yun/unit) Cost (lOOOOyun)
BC structure m2 3391 755 256.02housing
BW structure m2 1624 605 98.25housding _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
facility
structure m2 2770 385 106.65housing
III housing 15.65attachment
Concrete m2 2700 20 5.40level groundcowshed m2 300 80 2.40piggery etc.
bounding wall m2 1800 25 4.50
Phone set 60 108 0.65
Cable TV Household 90 300 2.70
IVResettment cos 27.73standard
relocation Househould 97 200 1.94subsidy .
relocation m2 9552 15 14.33encouracgement
Resettlement m2 9552 12 11.46transition fee
V Gound 18.63attachment
WC 1 2 10000 2.00
I KV wire 6 100 0.06pole
381V I 10 80 0.08wirepole
\transformer set 1 10000 1.00
trench M2 200 20 0.40
road foploughing M2 180 35 0.63manchine
plastic shed M2 2668 50 13.34
large trees 1 70 100 0.7>five years
youngtrees < tree 1 140 30 0.42years
1-5 total Yuan 10000 2566.43
VI reconnaissance 2% 51.33and desgn fee
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Item unit amoun Compensation standard (Yun/unit) Cost (IOOOOyun)VII monitoringand assessmen 1.5% 38.50costs _________
VII management 4% 102.66costsIX training fee 1% 25.66X buget reserve 10% 255.64Total costs Yuan 10000 3041.2
Table 4-22 The General Budgetary Estimation for ProjectResettlement
No. Items Amount (Mu) Unit price Total cost
(Y I0000/mu) (YIOOOO)
1 Land acquisition 170 20 3400
2 Cost of pipeline 20.4 20 408
and pumping
station
3 Total 3808
The project land acquisition involves a rural nature village, Linjia village; the relocated
people are 366. People will be resettled nearby, so there is only small change for the people
living and production .The living standard of people relocated will not be reduced thanks to
the resettlement policies and compensation polices of the state .So resettlement places small
impact on the residents. General speaking, the affected people are willing to resettle in
different places .Of cause, some people have objections to the resettlement polices and
standards because the project area is located at Yinxian Center District, an area with advanced
economy and people have better living standards here. There will be much work to be done
carefully for those people in carrying on the resettlement.
Part of the labor force will become surplus due to the land acquisition of 170 Chinese
Mu The spare labor force will be absorbed by local industry sectors, which is relatively
advanced, The local government should encourages enterprises to receive those people.
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
4.5.1.2 Impact on Traffic
The sewerage network project involves three districts i.e. Haishu, Jiangdong, and
Yinzhou. The excavation of roads due to pipeline construction causes traffic obstacles and
influences traffic and people' s living The traffic jams chances will be increased due to
construction materials transportation.
4.5.1.3 Impact on navigation route
The two river crossings of Ningzhong pumping station and South Beltway pumping
station adopt the process needing the excavation of footing groove, which will influence the
navigation of Fenhua River. The off shore submerged drainage measure is adopted in the
project. and this work needs the excavation of part of the beach of Fenghua River. The
construction of the section is complex and construction period is long. Though the work will
not influence the navigation. it will make the navigation route become narrow.
4.5.1.4 Impacts on living quality
The land acquisition and house relocation will produce a certain degree of impact on
working. schooling and living of the residents, which need to solve properly.
Dust produced by construction of pipelines and excavation of roads will affect people' s
living quality because air pollution.
4.5.1.5 Mitigation Measures
1. To make rational compensation and resettlement to the affected people according to
the polices and regulations issued by the state and the local government to reduce the negative
impacts of the project on their work, study and living and ensure the stable of the income and
living standard.
2. The construction of sewage pipeline should be carried out section by section, at the same
time to get contact with the traffic department to set up temporary convenient channels, and
arrange traffic policemen to maintain the normal order and try to avoid construction materials
198
Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAtransportation in rush hours to easy the pressure of traffic .Set up separators between
construction site of pipeline and the roads.
3. For pipeline construction, in some sensitivity points such as residential area and etc, it
is necessary to sprinkle water by watering cart to prevent dusting on the way which the
construction vehicle passing by.
4. During the construction of the river crossings and outfall of the WWTP, to make
contact with the navigation department and obtain their acceptance to set up caution mark
to demonstrate navigation director so as to let ships bypass in time. Caution signal lamps
should be set up during operation at night.
4.5.2 Social Environmental impact in the operation stage
The project is to build Jiangdongnanqu WWTP and sewerage to increase the sewage
treatment rate and improve the environment of the city. It is an environmental protection
project so the operation of the project will play a positive role on the social environment. The
main aspects are as follows:
l. AI'ter the completion of the project, the sewage of 7 service areas will
be treated in the WWTP and reach class II emission standard prescribed in
GB8978-1996 (Comprehensive Sewage Emission Standard) .The disorder state of
present sewage discharge by multi-outfalls will be changed and the discharge
of volume of pollutants will be greatly reduced .lt has a great significance
for improvement of water quality of Yong River, Fenhua River and inland rivers.
2. The construction of WWTP can effectively control urban sewage and pollutants
discharge so as to effectively control water body pollution, unbalance of ecosystem,
deteriorating of drinking water sources, maritime space environmental pollution.
3. The project can increase the disposal rate of sewage in the city of Ningbo
and improve the general environmental quality so as to improve the city' s
investment environment and image to promote economic development; it is also
a,precondition, and guarantee for sustainable social and economic development
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of Ningbo.
4.6 Ecological environmental impact analysis and
mitigation measures
4.6.1 Ecological environmental impact in the construction
stage and mitigation measures
4.6.1.1 Ecological environmental impact analysis
The construction of the outfall of the WWTP and river crossings will produce
SS in water body of F'enghau River and cause changes of dissolved oxygen, diffusion
of heavy metals in bottom sediment ancl partial change of pl-l value.
a, Impact on Fishery Analvsis
Fishery resources are deficiency in Yong River and Fenghua River according to
investigation. and also there are few breed aquatics so the impact on fishery is small.
hA 'I'he impacts on hydrophily biological resources
The construction process of river crossings needs pipeline-sinking
excavation of groove on the river bottom and the outfall of WWTP needs to excavate
the sediment in the outfall in Fenghua River. This will cause the change of
velocity of flow to affect sedimentation and movement of mud and sand .The
planktons and bottom dwell creatures will be affected to a certain degree.
4.6.1.2 Mitigation Measures for ecological environment
1. The land acquisition of the project is 170 Chinese mus so it is necessary to restore the
vegetation after the project completed and restore the landscape to plant more tress and reduce
water and soil erosion.
2 Rational processes should be adopted in the construction at the bottom of the river, to
reduce excavation volume and reduce the impact on water environment.
4.6.2. Ecological environmental analysis in the operation stage
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and mitigation measures
4.6.2.1 Ecological environmental impact analysis
The main pollutants in the effluent of the WWTP are CODcr, nitrogen, phosphorus and
etc. The analysis on the projection of Fenghua River shows that in the spring tide under
normal discharge condition, the full tide average value of Condemn has not exceeded the
standard of Class IV water body and the average concentration of the source area is 8.8mg/L;
but in the neap tide condition, the average concentration in source area is 9.88mg/L without
exceeding the standard even in full tide .The water quality of Fenghua River still can maintain
the standard of Class IV. This shows the effluent discharged from the WWTP has less impact
on the ecological environment of Fanghua River.
The main situation is in the mix area near the outfall, the life forms may be affected
slowly in a certain degree, especially to those life forms sensitive to pollutants. At the same
time, the influent of the WWTP contents of heavy metals which will produce slowly and long
accumulated effects on part of the life-forms. The discharge of nitrogen and phosphorous
provide the substance foundation for eutrophication of the water body.
4.6.2.2 Mitigation Measures for Ecological environmental Pollution
1. The WWTP should be built strictly according to the provisions of "Quality Standard
for Sewage Discharged into the Sewer "CJ 3082-1999 and " Integrated Discharge Standard of
Sewage Discharge "GB 8978-1996 It. is required to control the components of industrial
sewage especially the one contents heavy metals and other injurants to make stability of
effluent discharged from the WWTP.
2. The analysis on normal monitoring shows that the ammonia nitrogen and total P in
Yong River and Fenghua River exceeds the standard. The related function departments should
make further investigation and put forward relevant prevention and abatement measures.
4.7 Analysis of accidental risk
The main risk is unusable of WWTP and pumping stations (such as equipment disorders
and power cut to cause sewage flooding or discharge into the river directly. Another risk is
exploding May happen due to sludge landfill.
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4.7.1 Pumping unusable
The pumping stations rehabilitation of the project includes: Ningzhong combined
pumping station and Wudongzha sewage pumping station reconstruction and new
construction of Wangzhun and Qiubi pumping stations . As Ningzhong and Wudongzha
pumping station are located along the Fenghua River so in cases of power cut or pump
disorders the sewage would flood into the river with less impact on the surrounding
environment . But Wangzhun and Qiubi pumping stations are near the residential area of the
village sand there is some farmland near Qiubi pumping station ,therefore if the above
mentioned incidents happened ,the villagers' living environment will be affected serious .In
order to handle these kinds of accidents the double power sources and standby spare pumps
and generators will be prepared. At same time the maintenance of the equipment should be
strengthened .
4.7.2 The Accidental discharge of the effluent of the WWTP
The accident discharge of the effluent of the WWTP mainly happens under the condition
of electricity cut and equipment damaged resulting in unable to work or to make the sewage
discharged directly into Fenghua River. According to the projection to the effluent discharged
from the WWTP into Fenghua River, under spring tide condition without treatment the
average increment of COD mn is 6.52/L; under neap tide condition is 10.8mg/L. In
consideration of the existing and planning superposition effects, in the condition of spring tide,
the area of water body exceeds Class IV is 0.78 sq.km; the average maximal concentration in
the source area is 12.6mg/L; and that in the condition of neap tide the average area exceeded
the standard is 1.33 sq.km; the average maximal concentration in the source area is 15.9mg/L.
Compared with the projection result of sewage discharged without treatment, there is a
discrepancy nearly one time between the maximum value and average value . This indicates
that the untreated sewage discharged directly into Fenghua River will produce great impact on
the water quality of Fenghua River, such things must be avoided. The measures can be taken
as follows:
(O Adopt double circuit feeding;
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© Sufficient standby equipment and emergency parts must be prepared;
(E Strengthen the maintenance of the equipment of the WWTP.
4.7.3. Dehydrated sludge Centralized Landfill
The dehydrated sludge has low water penetrative and when it is land filled in a large
quantity it will produce gas of CH4, CO and H2S and etc after aeration and due to the
cumulating reactions, explode may happen when flammability gas reaches the explode limit
so as to affect the operation of the landfill .The mitigation measures are as follows:
To mix the dehydrated sludge with municipal garbage to increase ventilation;
Set more vent-pipes;
To treat by methods of aeration and digestion to reduce water content.
4.7.4 adding chlorine risk
EIA suggests that the process of WWTP should adopt dispoisoning measure by use
chlorine. The physical and chemical characters of chlorine are:
Configeration: yellow and green gas. Becoming liquid under high pressure.
Boiling point:-36.5 C. Fusion point: -101 C.
Relative density: vapour 2.5(air=1); liquid 1.56(water=l)
Vapour pressure:634.8kpa(20°C)
Dissolvability: dissolving in water and aqueous alkali. Dissolving easily in CS2 and
CC14.
Risk:serious poison
Intensive stimulation
Bombing when mix with other combustible gas in the sunlight.
Chlorine is a harmful gas exsited in sorts of industries. It can be used to prepare
agricultural chemistry, bleach, dispoison chemistry, solution, plastic, synthetic fiber and other
chloride.
The main riskness of chlorine is
l.taking place accidents when liquid chlorine cylider is ransported long
distance:shinning of breaking of liquid chlorine cylider; leakage or
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explosion because of thrashing of dumping in the transport.
2. leaking or other accidents because of disfunction or losing contral of the chlorin adder.
3. releasing the residual liquid chlorine when changing cyliders.
4. leaking or explosion because of disoperation.
5. leaking or explosion because of the accident of storage or natrual factors beyond
contraol.
Prevention measurens are:
I.Chloring factory and its storage house must apply with the rules of GBT16 Fire
Prevention Standards of Construction Design. The health and environment must accord with
GJ36 industrial enterprise design health standards.
2. Liquid chlorine culider must be checked periodic. Cylider should be put in special
house without any combustible materials.
3.Apply with the safe standards for chlorine storage and transport.
4.The cylider junction can be set a aspiration cap which can move. Gas either discharge
empty after being washed by alkli solution or relate with the aspiration cap. When the density
of NaOCl is accumulated enough, it can be sent into chlorine adding house.
5.The workers who touch chlorine process such as using, store and transport must be
trained and tested. They can not begin to operate until they receive the certificate. The obliger
of chloring using, storing department should practisely master the process and characters of
the equipments.
6. Carry out the safe poerating standards strictly, eliminate leaking and incipient fault
lying in equipments and ensure the normal condition of equipments.
5 Alternative Schemes
The WWTP will not only conform the requirements of design cnterions but also in
allusion to the realities to reduce the investment. So it is important to work out more schemes
to integrate environment protection with economic benefits.
5.1 Site of the WWTP Selection
The following elements have been considered in the selection of the site of the WWTP:
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1. To integrate with the existing sewer drainage network
The sewers of Ningbo have been built and perfected on a continuous basis and from a
combined drainage system transiting into a separate drainage system. Since 1992, in particular,
with loan from the World Bank, many trunk sewers have been built to form a trunk pipe
network discharging sewage to Sanjiangpian. Before this project, sewage from downtown
areas is mainly drained into the three rivers. So, the construction of the treatment plant will
take advantage of these sewers to rapidly and directly collect the sewage as much as possible
and give them a treatment before discharge, and the planned treatment plant in
Jiangtongnanqu can meet the above requirements.
2. Plant location is basically in the load center
In the previous planning, both Ningbo and Yin County had their own sewage collection
and treatment facilities although they are close with each other, and treatment plant of each
had neither economic benefits nor environmental benefits. The combination of the two plants
according to "Urban Master Planning of Ningbo City" (1995-2010) is a breakthrough by
which the fundamental facilities can be shared and plant location is basically within the load
center, thus providing benefits both in scale and economy.
3. Convenient for recycling of effluent from the WWTP
The issue of reuse of the treated sewage has been given more and more attention by
people; the effluent treated can be reused in the industrial park of central area of Yingzhou
District. Changfeng thermal power plant, which is adjacent to the sewage treatment plant, is a
best outlet of the treated sewage from the sewage treatment plant, where the sewage is used as
circulating cooling water, showing an obvious economic benefit.
4. Issue of incorporate with Jiangdongbeiqu WWTP
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First, distance between Jiangdongbeiqu WWTP and Jiangdongnan WWTP is more than
10km, and delivering distance of pipeline is about 20 to 30km. As sewage are delivered by
gravity, 2 to 3 large-sized pump stations shall be built along the pipeline, thus huge cost for
construction and operation is required. According to estimation, if the combined plant is built
in Jiangdongbeiqu, the cost of sewers and pump stations will increase by RMB 80 million,
while the investment for sewage treatment plant will make a RMB 5 million reduction. So the
total construction investment will increase by RMB 75 million, and the cost for sewage
delivery will increase accordingly. In addition, it is necessary to lay additional costly sewers
to the treatment plant in Jiangdongbeiqu along the river as the construction of sewers in
Renminglu and Jiangdongbeilu along the river are already completed. Furthermore. as the
sewage treatment plant in Jiangdongbeiqu is within Yong River scenic spots, expansion of
land for the plant is impossible.
To sum up. site selection for Jiangdongnan WWTP is reasonable and feasible.
5.2 Sewage Treatment Process Schemes
5.2.1 Brief description of the schemes
Recommended Scheme
A/O process: After the first stage treatment, the incoming water and returning sludge enteranaerobic section (Section A) for TP removal and then enter the aeration tank (Section 0) andbiological nitrification so as to remove organic, NH3-N and P, afterwards, they enter thesecondary settling tank to reach the standard for discharge.
Substitute SchemeOxidation ditch process: The oxidation ditch process is a process improved from the activesludge method. Its aeration tank is a sort of sealed channel. The mixture of sewage andeffective sludge flow in circulation continuously in the channel. Being simple in structure,easy for management and reliable for operation, the process is widely used in China and othercountries.
5.2.2. Alternative Scheme
A/O process effectively removes organics and TP while the NH3-N content in outgoing watersatisfies the requirement of standard for discharge. In the time, the chemical method is used toremove TP released from the filtrate after dewatering. Anaerobic section and aerobic sectionare adopted in the A/O process as a biological and chemical method. An
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAagitator is provided at the anaerobic section for flow pushing and a blower with airdistributors at the tank bottom is provided for the aerobic section. The energy consumption islow and sludge is basically stable.
Oxidation ditch process is good for oxygen removal with nitrification and reverse-nitrificationreactions. Anaerobic tank is provided before the ditch to remove TP and a chemical method isused to remove residual TP in the filtrate. Oxidation ditch process consists of three channelswith a disc for oxygen supply. It needs long period for sludge and big power consumption.The treatment of sewage and sludge is good. See Fig. 5-1 for details.
Table 5-1 Sewage Treatment Process Comparison
Item A/O process Oxidation ditch processAdvantages 1.Organic matters removal 1. Organics removal and
ensured; NH3-N removal comply2.NH3-N removal Ž60% and P with the standard.removal by biological method
3. Easy to management, blowingaeration, less maintenance foroxygen supplying equipment4.One A/O tank, with land
occupation lower5.Lower investment and
operation costsDisadvanta 1. More sludge 1.Complex management
ges more work formaintenance;
2. Long time for sewageretaining and sludge with
more power consumption;3. More land use and
investment
Upon comparison, investment, operation cost, operation experience, raw water quality
and discharge of outgoing water, etc. shall be also taken into account so as to make a proper
recommendation. As organics and NH3-N and N in sewage in the treatment plant is not so
high, advantages oxidation ditch can not be fully played, actually the limited site area is the
critical reason, without more space, further expansion with a capacity of 40 X 104m3/d is
restricted. Therefore, A/O process with dephosphorization by biological method is
recommended
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Dehydrated Sludge Disposal Methods
At present the common method to be used for sludge disposal in urban WWTP is
incineration method and the ash is used for farming fertilizer (soil improvement), garden
greening, filling and sanitary landfill.
The advantages of incineration of the solid wastes are to realize the maximum reduction
of amount, to kill all pathogen. toxin pollutants to be oxidation: the heavy metals content is
lower than active sludge. The disadvantages are: the combustibility of sludge is lower due to
the complex components; the exhausted gases generated by incineration are complex and
harmful; the toxin gases will be produced during the process of burning, it will be caused
secondary pollution to the ambient air without air purification equipment and the cost for
incineration is too high. Even in developed countries incineration equipment only accounts
for 10%. According to the economic strength. it is different to use this method now.
The relevant permissible maximum concentrations have been prescribed in the
Pollutants Control Standard for Farming Sludge" (GB 4284-84) of China. The standard is
applied to farming land using sludge from the urban WWTP.but study on farming use of the
sludge in China is backward, the existing technology and equipment are not mature, in
addition the lack of fund, high cost to develop and produce farming fertilizer and even
resistant by farmers all these reasons restrict the development of the use of farming sludge.
The sludge organic fertilizer can be used in the flower nursery to improve soil to increase
the content of organic elements in soil. , The heavy metals and harmful matters cannot enter
into food chain. Therefore sludge has a larger potential in the urban garden greening, but the
bacteria content in the sludge is too higher, if people touch the trees or flowers, it will be
harmful to the health. and that it emits odor in early days of using to make people feel bad .
These issues need to be studied further.
To send dehydrated sludge to landfill for sanitary landfill is the method adopted in most
of the WWTP in our country. At present sludge landfill is disposed with the urban garbage
together. The standard sanitary landfill has leakage prevent facilities can prevent N, P and
heavy metals pollute the ground water. So the method has the advantages of less secondary
pollution, easy operation, but it occupies more land.
To sum up, there are many methods for the sludge disposal and each has its advantages
and disadvantages. In consideration of the aspects of environment protection, economic input,
high maneuverability, and effects to control pollution and improve the environment, the
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method of dehydrated sludge landfill is recommended.
6 Public Participation
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6.1 Objective and method
6.1.1 survey objective
The objectives of the World Bank project, Jiangdongnanqu WWTP are to increase the
sewage disposal rate of the city, to improve the urban environment and improve the living
condition of people. However, the project will place some negative impacts on nature and
social environment of the city in the construction stage and operation stage, The life, work
and study and entertainment of the people in the project area will be affected directly or
indirectly In order to understand reflections of people from government agencies. enterprises
and organizations and other areas a public survey has been carried out .The public are invited
to provide opinions and evaluations to the project to improve the engineering
design ,plan ,and construction to make the project better and EIA more completed and
objective .
6.1.2 Survey Objective
The way of public surver combined againstic and prohabilistic characters
to make the EIA more objective without individua] and personal subjective.
6.1.3 Survey Method:
Visiting project area and different levels of governments, enterprises and units and
residents in the service areas and issuing questionnaires will carry out the participation of the
public to collect judgement and suggestion which are also collected by mass midia to notice
public the report of EIA and correlated document.
6.1.4 Survey Orgnanizations:
the institution conducting of EIA adopt all sorts of measures to collect the judgements
and suggestions of governments, enterprises and units and residents in the service areas who
should be compensated.
Two rounds public participation have been finished. The detailed step of the first public
participation is: issuing quewtionnaires to different levels of governments,enterprises and
units and residents in the service areas .
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAThe detailed step of the second public participation is: issuing public notice in "Ningbo
Daily" to known public how to inquire the information of the report of EIA and correlated
document and feedback their judgements.
6.2 The First Survey content
6.2.1 Survey Content:
6.2.1 .1 Individuals:
Acquaint oneself with the WWTP;
Attitudes toward to the project;
Satisfaction to the current sewage treatment and sewerage of the city;
The impacts of the project on the people living nearby;
Impacts on economic development;
Attitudes to the construction of the project
Attitude to the resettlement
6.2..1.2 Organizations:
General ideas and attitudes to the construction project;
Whether the project benefit to the development of the area and departments;
Whether the project will improve the living quality of the local people;
Whether the project will benefit to the local sights and tourism,
lImpacts on agriculture and environment
6.2.2 Survey Results:
6.2.2.1 Survey objects and proportion:
In this public participation activity we visited different levels of governments, enterprises
and units and residents in the project area and service areas. We issued 50 questionnaires and
collected 41 sheets, of which 35 questionnaires from individuals in the project area and
service areas and surrounding area; 6 from organizations i.e. Zhonggongmiao Township
Government, Zhonggongmiao Township People' s Congress, Yinzhou District People' s
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Congress, Yinxian Center Administration and etc. in the project area and surrounding areas.
Random issuing the questionnaires to the individuals and the background of the people
to be investigated were not known in advance. Therefore, the occupation structures and
education structures of the people are not equality, but the range is large and involves many
areas including resettlement areas, project surrounding areas and remote areas, which has
better representative.
Ningbo Jiangdongnanqu WWTP Public Participation and Survey ObjectProportion (individuals)
Occupation Leaders Cadre Worker Farmer Student labore
Person 0 14 12 8 0 1% 0 40.0 _ 34.3 22.8 0 _ 2.9
Below Junior High Senior Technical UnderEducation primary school # r High secondary Junior
school School school CollegePerson 5 6 5 2 17
% ___ 14.3 17.1 14.3 5.7 48.6
Age 18-35 35-60 >60 Sex Male FemaleNumber of 18 13 4 Person 21 14
person% 51.4 37.1 25.0 % 60 40
Residential Neighborhood of Remote area of theResettlement area prjc.__________area project project
Person 8 2 25% 1 22.9 5.7 71.4
6.2.2.2Survey Results Analysis:
Individuals:
No. Item Selection ProportionI Acquaintance degree to Know 48.6%(17)
the project Unknown 51.4%(18)Support 91.4%(32)
2 Attitudes to the project Object 0Not care 8.6%(3)
3 Impacts on your life, work Much impact 22.9%(8)and study by the project can be endured, 14.3%(5)
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=____ No 62.6%(22)
Opinions to land Satisfaction 25.7%(9)4 acquisition and Basic satisfaction 60.0%(21)
compensation Dissatisfaction 14.3%(5)Satisfaction to current Satisfaction 25.7%(9)
5 sewage treatment and Basic satisfaction 54.3%(19)sewerage network Dissatisfaction 20.0%(7)
Satisfaction 8.6%(3)6 Satisfaction to the currentBasically satisfaction 68.6%(24)
surface water environment Bicsatisfaction 22.6%(8)Dissatisfaction 22.8%(8)
Impact oftepojPositive 54.3%(19)7 Impacts of the project on No 22.9%(8)
the people's living Negative 22.9%(8)
Do you mind noise and Yes 68.6%(24)8 off-odor produced by the
proj ect No 31.4%(11)Impact onsociaPositive 82.9%(29)
9 Impacts on social No 11.4%(4)economic development Negative 5.7%(2)
The survey shows:
1 , The people did not acquaint themselves with the project .The people who have known
the project accounting for 48.6%. More publicity needs to give.
2, People support the construction of the project which showed by the result of people
support the project accounting for 91.4%and no one objected the project .
3. People who think the resettlement of the project will place large impact account for
22.9% and they are mainly from the project area and their houses are to be relocated .People
who think less impacts account for 14.3%, and they are mainly from the surrounding areas of
WWTP and service areas near the sewerage network. 62.6 % of the people think no impacts.
4, . Generally people think satisfaction to land acquisition and compensation measures
and only 14.3% are dissatisfaction. Such people mainly are from resettlement area.
5, The people who are satisfaction to the sewage facilities of the Ningbo account for
54.3% and the people who are satisfaction to the surface water of the city account for 68.6%.
6, The people who think the project will give positive impacts on the people' s living
account for 54.3%,and they think the construction of the project will improve the urban
environment and benefit to the people' s living .The negative answers account for 22.9%,
and such people mainly live around the project and resettlement area and they think the land
acquisition, resettlement and "three wastes" discharge will affect their living.
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7, 68.6% of the people care the impacts to be brought by the operation of the
project This shows that the consciousness of people to the environment and no matter live
near or far from the project area people show concerns to the "three wastes " in the
operation of the WWTP.
8, 82.9% of the people think the construction of the project will benefit to the
economic development and 5.79% do not think the project will benefit to ,they are mainly
from resettlement areas .. .
Organization survey:
No. Items Comments Proportion
1 Opinions and attitudes Good (support) 100%to the project Not good (oppose) 0
. . ~Benefit 1 00%oIf the project benefit to
2 the local or sector Without benefit 0economic development No impacts 0
If the project will Benefit 83.3%3 improve the living Without benefit 0
quality of the area No impacts 1.7%
Imacs gicu Positive impacts 66.7%Impacts on agriculture167
4 and environment Negative impacts 16.7%No impacts 16.7%
If the project benefit to Positive impacts 50%5 the sights and tourism Negative impacts 16.7%
of the region No impacts 33.3%
The survey results analysis shows that the social organizations support the construction
of the project and think it benefit to the economic development of the region and
sectors .83.3% organizations think the improvement of the environment will benefit to the
people' s living quality. 66.7% of the people think it will benefit to agriculture and
ecological resources. They think the sewage after treatment will reduce impacts on the
surrounding and reduce sewage to be discharged to the surroundings .16.75% organization
think it will not benefit to agriculture and ecological resources and they think large sewage
discharge will affect the water quality of the Fenghua River .50% people think it will benefit
to local sights and 16.7% of the people think it will not benefit to certain parts of
environment.
Summer the opinions of people through survey:
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAI Work to be improved on land acquisition ,resettlement and compensation;
2, The operation in the construction period should pay attention to the sensitivity
points ,mainly the villages and project surroundings;
3- Take appropriate measures to handle noise and off-odor emissions to reduce the
impacts on the environment
To sum up, the construction of the project has achieved public' s understanding and
support, and most people think that the project will benefit to the improvement of living
quality of local residents' residential condition The project will benefit to the economic
development of the city. Though there are some negative impacts on part of the villagers for
the land acquisition, resettlement and construction and operation, as long as we do a better job
in resettlement and land acquisition compensation and in the construction period take
effectively measures to reduce impacts on the residents nearby by the noise and dust etc
caused by the project, and take environment protection measures in operation period, the
negative impacts of the project to the nature and social live can be controlled in the allowable
range .
6.3 The Second Survey
6.3.1 Survey Content
According to the requirement of the World Band policy of EIA and actual requirement,
we have had the second public survey on the I h, march,2003 by issuing "public notice" in
"Ningbo Daily" . The objective is to make people understand and participate Cicheng
Town' s environment protection project and know how to inquire the report of EIA and the
correlated datas of immigrant resettlement. We also set the information feedback mail box to
receive the suggestions of public.
(1) resting place and time
data resting place: reading room of Baoyugang Libery(the 2nd Floor). Inquiring
online(web address: www.nbepb.cnnb.net)
resting time: since the 7 th ,march, 2003
6.3.2 Survey results
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Accroding to the periodic inquiry and back visiting to the resting place on the 3th, april
2003, we did not find any feedback notice in the mail box and suggestion book. The libery
managers tell us many readers inquire their datas againsticly and partial readers read the
project data without giving any suggestion. They consider the main reason is that (I) the
living rhythm is fast, their works are busy and the project has little relationship with them.(2)
the Jiangdongnanqu WWTP project is a environment protection item which benefit to people.
Because people have no any judgements they have not left any words about it.
6.4 Final Survey Result
To sum up, the inquiry targets of the public participation represent different levels. The
survey result show that:most people hold-up the construction of the project. As a social
benific project, it will be benefit ecological environment and water quality of the city,
develop the construction of ground attachment of the city, increase the figurativeness
and grade of the city and optimize the investment climate of the city. It should promopt
the development of the social economic of the city. It is suggestion that the batter job
should be done to compensater the villagers for land acquisition and supply them
employment, as the same time take good environment protection measures and use the
construction funds appropriately and effectively.
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7 Environmental Economic Benefit and Loss
Analysis
Urban sewage disposal project belongs to social commonweal infrastructure and it
contributes to eliminate water environmental pollution. The issues of sewage discharge
become more and more important with the expansion of the urban area. At present, the main
receiving water bodies of the city of Ningbo, Yong River and Fenghua River, their water
quality is in the critical status of Class IV water body. Moreover, Yong River and Fenghua
River obtain their present environment load for water quality depends on tied of seawater in
shore. Therefore, the pollution degree of Yong River and Fenghua River will affect the
seawater quality in shore. And that in the range of the service area large amount of industrial
sewage and domestic sewage cannot be brought into Yong River and Fenghua River and it is
discharged directly into t he inland rivers. This will not only produce pollution on the surface
water and greatly restrict the development of the local economy. A good water environment
will not only benefit to people' s health but also produce positive impacts on industrial water
utilization, fishery and hydrophily ecosystem and also benefit to the economic development.
But centralized treatment of urban sewage will not only need a larger input and higher
operation cost every year, but also the discharge of effluent after treatment will cause
pollution on the water space of the discharged area to reduce the environment quality of the
area and bring losses to people' s health and fishery. Moreover, there will be great potential
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAimpact for the disposal of sludge. No matter whatever methods to be taken, incineration or
landfill, as soil improvement agent it will produce various impacts on the environment.
The environmental economic benefit and loss analysis mainly study the feasibility of the
project from the point of view of social benefit, economic benefit and environmental benefit.
of which, economic benefit is more immediacy, and it can be measured by currency but as for
social benefit especially environmental benefit, there are some indeterminacy, potential and
risks. Such analysis can only give an approximate range and status to conduct qualitative
analysis with non-monetary form but the macro and microcosmic economic evaluation must
be conducted to weigh the benefit and loss of the construction project. The benefit of WWTP
will be mainly reflected on environmental benefit due to it is a environment protection project,
and certainly it has comparative economic and social benefit but it may also bring some
losses.
7.1 Economic Benefit
According to the feasibility study report, the construction investment and operation cost
is shown in Table 7-1.
Table 7-1 Investment and operation cost of Jiangdongnanqu WWTP(10000 Yuan)
Item Investment Yearly operationcost
WWTP 21283.69(Including land 2541acquisition fee and other fee)
Sewage networks 18927.77(Including other fee) 3520(including pumping
stations)
In addition, the land acquisition of the project is 170 Chinese Mu, if each Mu of land
produces 500 kg paddy, the loss of paddy will be 85000kg/a; the economic loss will be
340000Yuan/a.
WWTP project is part of the urban infrastructure belonging to public utility and its
revenue base is sewage treatment volume. According to calculation , if the project can meet
the requirement of repayment of the world bank loan , the unit price of sewage charge would
beRMB2.1/M 3 . According to the design capacity of the project , the average
sewage treated volume would be 58.4 million m3 . So the total revenue in an
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operation year is RMB 122.64 million.
7.2 Environmental benefit
7.2.1 Cost Estimation of Main Environmental Protection
Measures
The total investment of the project is RMVB 402.11 million. The investment of each
environment-engineering item is shown in Table 7-2.
Table 7-2 Environment Engineering Investment Schedule
No Item Cost Remark(lOOOOYuan
1 WWTP and 40211.46 The project is environmental projectSewerage network and the project investment is taken
as environmental investment2 Sludge disposal 455.52(yearl Sludge landfill cost is 52 Yuan/t
3 Noise control 504 Afforest 505 Construction stage 50
7.2.2. Environmental benefit and loss analysis
7.2.2.1 Ambient air benefit and loss analysis
Environment loss in the construction stage: The project will generate some
dusting in the construction stage, which will produce some impact on the
environment of the project area. It will return to the original air level after
the construction of the project.
Environmental loss in the operation stage: It is mainly the effluvium
emitting from the WWTP. The air pollution protection and abatement cost will
be taken as a loss of the environment damage, which mainly includes the relocation
of the people in the surrounding sensitivity areas.
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7.2.2.2 Water environmental benefit and loss
Environmental loss in the construction stage: It includes the cost of disposal of slurry
water, storm water in construction stage, cost for treating domestic sewage in construction
stage. monitoring cost in pre- construction, during the construction and after construction
stages.
Environmental benefit in the operation stage: The effluent of the project will produce
impacts on partial of the Fenghua River, but in view of the overall water quality of the river.
the analysis shows the water quality of Fenghua River will be improved.
By construction of Jiangdongnanqu WWTP, COD, BOD5 and total P will be reduced
3000.2t ,420.5t and 43.8t per year, respectively( inlet water quality caculated by the sewage
quality of the pump station in the EIA). Due to the removal of the pollutants, the construction
of WWTP will leave more space for the total amount control in this area.
As soon as the project is finished, the sewage of Yin County central area, Cicheng Town
and Dongqianhu city will flow into it. then discharge into fenghua River after being treated.
The current stutas of sewage discharge derectly into inner rivers should be changed which is
of great benefit to the three districts.
7.2.2.3 Acoustics Environment benefit and loss analysis
Environmental loss in the construction stage: The noise of construction equipment will
place impact on the environment, but the impact is hard to calculate. The impact will be
reduce by rational measures and disappeared after the project.
Environment loss in the operation stage: The loss in the operation stages mainly the cost
happen for noise control, which is about RMB 500000.
7.3 Social benefit
Environment loss: the relocation and resettlement of the villagers in the project area,
which is converted into RMB 38.08million and there is some loss for farming land.
Environment benefit: The project is urban infrastructure, and is the necessary condition
for production and living. It produces active impact on promoting the living standard and
health level of the people of Ningbo .The main aspects are as follows:
I.lmprove water quality status
The project lies in Yin County whowe river web distribute thickly. The main river
includes Nantang River, Zhongtang River and Qiantang River.Recent
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAmonitoring reports show that the water quality of Yin County river web is in the critical status
of class III-V.In recent year, because the economic of Yin County improve fastly, its town
industrial enterprises develop well, the industrial and sanitary wastewater increase more and
more. Howerer, because urban infrastructures are not satisfied, those wastewater discharge
directly into the inner rivers nearby. Therefore, the water quality of river web of Yin County
become more and more polluted. In some setions,the pollutions such as oil, BOD5, COD
exceed the standard of class V and the contralling target of environment function area.
According to the mornitoring datas for Yong River and Fenghua River from 1997 to 2001,the
main pollutants affected Yong River and Fenghua River are ammonia nitrogen, total P, oil,
Do and BOD5 which exceed the standards at different periods. The pollutants of Sangjiangkou
is higest and chengjiangyan and zhangjianqian the second. The matched issuing sewerage
should change the current status that city sewage discharge ranomly into Yong River,
Fenghua River and inner rivers from much many outlet aperture. All sewage should be
concentrated to treat and issue at inquiring standards. The pollutants especially P should be
decreased much more than ever, so as to reduce the pollution of water environment, suppress
water body nourished, inprove water quality of Fenghua River and fully display the industry,
fishing, water transports function of Fenghua River.
2. matching the total amount of pollutants discharge
By construction of Jiangdongnanqu WWTP, COD, BOD5 and total P will be reduced
3000.2t ,420.5t and 43.8t per year, respectively( inlet water quality caculated by the sewage
quality of the pump station in the EIA). Due to the removal of the pollutants, the construction
of WWTP will leave more space for the total amount control in this area.
3. Achieve continuous development
Following with the rapidly development of Ningbo city's social and economi,the amount
of wasterwater and sewage will increase much more. Water body pollutation will become
more and more heavy. Polluted area will be markedly increased, ecology will be destroyed
clearly, water quality for drinking is more deteriorative,and the pollution of sea environment
will be more serious step by step. The construction of the project should help to increase the
sewage treating rate, improve present sewerage, realize the separate system, discharge
smoothly, increase the total environment qulity of the city. Therefore, the investment
environment and the configuration of Ningbo will be improved which prompt economic
crafting. The project ensure social, economic continuous development. As the same time, it is
venifit to improve and increase the living condition health of Ningbo.
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4. implement the city master plan
To realize the environment protection target of Ningbo City master plan, sewerage and
concentrated wasterwater treatment plant must be rapidly improved. The project is one of the
two WWTP which is planed to build before 2010 in the city master plan. The request that
sewage treating rate reach to 60 percent in 2010 cound not be satisfied if the project won't
build.
8 Environmental Management and
Environmental Monitoring Plan
8.1 Environmental Monitoring Plan
The main impacts of the urban WWTP on the environment is the impacts of
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIAeffluent discharge and sludge on the surrounding area of the WWTP, therefore
the priority for the environmental monitoring should focus on the water
environmental quality of surrounding area and adjust the treatment degree of
the WWTP in time and adopt relevant environmental protection measures.
8.1.1 Environmental Monitoring Plan for Surface Water
1. Water quality monitoring points
Three monitoring points to be set up on Fenghua River:
500m in upper reaches from the outfall, outfall and 500m in the lower reaches
from the outfall
One monitoring point is set up in inland rivers.
Near Eastside Bridge
2- Monitoring items and frequency
Monitoring items: pH, DO, oil BOD, CODM, CODcr, Ammonia Nitrogen total
fecal coliform bacteria and negative ion surfactant .
Monitoring Frequency:
Two times per month
Emergency monitoring (aperiodicity)
8.1.2 Sludge Monitoring Plan
Monitoring Range:
WWFP
Sampling time and method:
Once in a month to monitor the sludge generated from the WWTP and planning
to landfill outside
Monitoring item:
Water content
8.1.3 Sewage water quality monitoring plan
Monitoring points to be set up:
Inlet and outlet of the WWTP, three times a day, once in the morning, noon and
afternoon
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Discharge flow monitoring:
Once a day
Monitoring Items:
pH,DO,oil BOD.CODN,,CODcr,ammonia nitrogen .TPWfecal conliform bacteria,
negative ion surfactant ,volatilization hydroxybenzene , Hg, lead , cadmium
sexadvalent chrome ,cyanide The automatic measurers ,sampling system should
be equipped . For some major indicators such as pl-l,COD the on line monitoring
equipment should be used to ensure the sampling frenqency not less than 2h/time
The analysis methods will base on the standard methods of the state.
8.2 Environmental Management
8. 2. 1 Institution and personnel
The Environmental Protection Division (section) will be set up in the WWTP and there
will be labouratory under the division to take charge the monitoring and testing. The division
of environment protection will be supervised directly by the director of the plant.
8.2.2 The responsibility of the Division
The project environment protection division will be responsible for the environmental
management and monitoring in the operation stage. Its main responsibilities are as follows:
1. Prepare the environmental protection plan including the short plan as well as the
long-term plan.
2. Put forward environmental protection budget and final accounts schemes and properly
allocate and use the outlay;
3. Carry out and put into effect the environmental protection laws, regulations
and policies formulated by the state and local government; receive the supervision of
the environmental protection departments in the project area, Yinchou District and
Ningbo Environment Protection Bureau. Cooperate and help related agencies to carry
out the work of environmental protection well.
4. Prepare and manage monitoring data, prepare phase report and annual environmental
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monitoring report;
5. Organize technical training.
8.2.3. Implementation of environmental management and
monitoring plan
1 , Institution organization
The establishment of Environmental Protection Division should be arranged in the initial
stage of the project construction and start operation after the project finished. During the
construction period it should be strengthen the relations with the environmental
administration departments of Ningbo to enhance the environmental management in the
construction stage. .
2. Outlay available
A great amount of outlay needed by the Environmental Protection Division to purchase
equipment and at the same time a lot of money to spend on the operation of the equipment
yearly. This part of cost will be included in the investment budgetary estimate.
3. Personnel Training
The staff in the Environmental Protection Division should be received technical training.
The technicians should have the certifications issued by the environmental protection
department so as to ensure the reliability of monitoring quality. The management staff should
be trained and educated in the aspects of polices and regulations to promote their management
level and professional level.
4. Enhance management
The leaders of the plant should strengthen the management to the Environmental
Protection Division and at the same time to giver more concern and support to it in policy,
outlay and talent people.
8.2.4 Setup Insulation Belt
The sanitary protection distance of the project is 300m. It is inadvisable to set up
commercial and trade district and residential district in the surrounding area of the WWTP. It
is suggested that to build greenbelt or road as insulated belt. The residential area should be set
up in the area over 300m away.
8.2.5 Setup navigation marks and anchor ban marks above
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bottom pipeline and ouffall
Submerged discharge of the drainage of sewage disposal will be adopted. The outlet will
be extended from the bank to river .In order to ensure the safety of the navigation; the
navigation marks should be set up at outlet. Anchor ban zone should be set up 50m from the
two sides of bottom pipes and discharge pipes
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9 Conclusion and Suggestion
9.1 Current Environmental Status Conclusion
9.1.1 Ambient Air
According to the monitoring on site, the maximal daily average concentration of SO 2
NO?2 TSP in the project area is 0.013mg/m 3 . 0.025mg/m 3 and 0.222 mg/m3 without
exceeding the standard of Class Il ; the maximal value concentration hourly of H 2 S is
0.005mg/m3 without exceeding the limit value prescribed in " The Maximal Permissible
Concentration of the Pollutants in Air in Residential Area " , but the concentration of NH3
hourly is 0.961mg/m3 exceeding the standard by 3.8 times .
9.1.2 Surface Water Environment
According to the analysis on the monitoring results in 1999-2001 in Ningbo, the water
quality of Yong River meets the Class IV standard in "Environmental Standard for Surface
Water" GB 3838-2002. Among the three sections, the water quality in the section of
Sanjiangkou is the worst, the items of NH 3 N, TP and BOD5 exceeding the standards in the
section The heavy metals are in the state of no results; some results were checked in wet
seasons but the concentration is very low which meets the requirements of Class I standard.
Part of the indicators in the section of Chenglangyan, Fenghua River exceeds the water
quality of Class V. The items of oil, total P and DO in the section of Panshidu reach the
standard of Class IV. The water quality of the inland rivers in Yinzhou District reaches Class
IV standard, and part indicators such as oil, BOD5 ad etc exceed Class V standard.
9.1.3 Acoustics Environment
The monitoring results in the WWTP site show that the noise value in the east, south,
west side has not exceeded the limited value of Class 3 set in "Environmental Noise
Standard for Urban Area" and in the north side the value has not exceeded the standard of
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Class 4. As for the three pumping stations to be renovated. The noise value reaches the
standard of Class 4 when they are in the operation state at daytime. The value exceeds the
standard at night mainly caused by the noise of pumping.
9.1.4 Ecological Environment
The land to be used for the WWTP construction is now plantation and housing
for villagers. There are two types of soil- alluvial soil and paddy soil at the site of the
plant . The soil in this region is highly slaked and cultivated soil with high productivity. It is
mainly used for planting economic crops such as orchid, rapeseed, melons, orange, vegetable,
grass seed and etc.
Due to frequent influences of already existed human activities in the project
area, the wild animals are mainly those of small kind who are used to the
influences of human beings like mouse, and these is no wild animals with
conservation value.
Birds are mainly of aquatic kind that lives on Fenghua River, just in a small number. In
recent years the water pollution in Yong River and Fenghua River is serious so there is few
breeding aquatics by people and fishery resource is in short as well.
9.2 Pollution sources output
9.2.1 Effluent Discharge of WWTP
The design sewage treatment capacity of the WWTP is 160000m3/d according to FSR
and the capacity cannot meet the requirement of sewage discharge in the area so the WWTP
will operate in full load .The total effluent discharge will reach 160000m3/d with small
amount of domestic sewage generated by the staff of the plant.
9.2.2 Solid waste of WWTP
The solid waste of the WWTP includes dehydrated sludge, dregs of coarse and fine grids,
grit of grit tank and scruffs of the sedimentation tank and living garbage of the staff.
9.3 Environmental impact Conclusion
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9.3.1 Ambient Air
The air pollutants generated during the construction period mainly come from dust
caused by loading, unloading and stacking of construction materials such as cement and sand,
and earthwork excavation, dust, exhaust and material dropped on roads caused by
transportation vehicles. The main pollution factors are: NO2 . CO ,dust and etc. The affected
scope is surrounding area of the construction site. After construction finished, the quality of
ambient air can return to the original level.
The foul smell emitted from the WWTP is a mixed gas mainly containing the factors of
ammonia, methyl hydrosulfide, methyl ethersulfide, trimethylamine, etc., but the main portion
is ammonia and sulfureted hydrogen. The main sources of foul smell come from grille,
sedimentation tank, aeration tank, sludge dewater machine room and sludge store tank. The
source intensity of discharge of NH3 is 0.255kg/h and H2 S is 0.096kg/h. According to
Technical Measures to Establish Local Air Pollutants Emission Standard (GB/T13201-91) for
projection and analogy study, the sanitary protection distance of the project is 300m.
9.3.2 Water Environment
According to the water flow and quality model of two-dimensional non-constant flow
projection, when the effluent is discharged into Fenghua River, under the spring
condition ,normal discharge ,the COD mn value increased in average is 3.26mg/I; Under
neap tide, average increased value, 5.38mg/l. Without treatment the average increased value
of CODmn in neap and spring tide condition is 6.52mg/I, 10.8mg/I. In normal discharge
condition, the average concentrations of the source area is 8.80mg/L; but in neap condition.
The average concentrations of the source area are 9.88 mg/L. There is no pollutant value
exceeding the standard in the full tide maximal value. The maximal concentration in the
source area is 12.2 g/ 1; but the direct discharge without treatment in the condition of spring,
the area exceeded Class IV water body is 0.78 km 2 ,and the average maximal
concentration is 12.6mg/L; And that in neap condition average area exceeded the standard is
1.33 km2 and the maximum concentration in the source area is 15.9mg/L;
The results of the projection show that the water quality of the discharge of the
wastewater after treated is much better than the one without treatment .The maximal values
and average values' discrepancy is more than one time. The neap tide is disadvantage
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condition. The water quality of Fenghua River is higher for the content of CODcr.
The projection results made by the box model show that in 2010, before sewage
interception the mean value of CODmn in the section of Sanjiangkou, Ningbo is 7.7mg/L for
many years; after sewage interception, COD mn is reduced to 5.6 mg/L. The water quality of
Fenghua River can be improved from Class IV to Class III.
9.3.3 Acoustic Environment
In the south of the construction site there is a village, Lingja Village. The
construction noise can affect people there in daytime as well as at night. At
night the noise of loading machine, leveling machine and electric saw and etc
can affect the area more than 250m around. The construction should he stopped
at night to reduce the impact on the sensitive points around. Many residential
houses are near the pipeline network construction site, so the noise generated
from the construction site will affect the living environment of the people.
According to the projection to the operation stage, the maximal value in the boundary of
the WWTP in the operation stage is 48.8 dB (eastern side), without exceeding the standard
limit value of Class 3 function zone and the impact of the noise of the flow in the sewage
tank is limited. This indicates that the boundary noise in the operation stage can reach Class
3 standard set in "the Industrial Enterprise Boundary Noise Standard" GB 12348-90/. The
three pumping stations to be renovated meet the standard of Class IV at daytime set in "the
Industrial Enterprise Boundary Noise Standard" . The indicators exceed the standard at
night. All the pumping stations are set up at the river far from the residential areas so the
impact is less.
9.3.4 The solid waste
The solid wastes in the construction stage mainly include abandoned earth,
construction garbage and living garbage of the builders. The garbage of
construction can generate dusting easily and living garbage is easy to grow
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mosquito and produce foul smell. to spread diseases and produce negative impact
on the surrounding environment.
In the operation stage, the dregs output is 20m3/d, dehydrated sludge, 96t/d, grit, 3.2t/d,
living garbage of the staff, 50kg/d. The foul smell and leakage from the solid wastes may
produce impacts on ambient air, surface water and ground water and at the same time it is
easily to spread diseases.
9.3.5 Social Environment
There are about 120 households with 366 people to be relocated and 225 Mu land to be
required. . The living and residential standard level of people relocated will not be reduced
according to the resettlement and compensation polices of the state and that the spare labor
force caused by reduction of land can find jobs due to the developed economy in the area.
Therefore the impact of resettlement is small.
The construction will produce a certain impact on the navigation of Fenghua River.
Before the construction to contact the departments in charge of the traffic and navigation, the
construction will be carried out by stages under the precondition that the traffic should not be
affected to ensure the normal order of traffic and navigation.
The land acquisition and houses relocation will place a certain impact on the work, study
and living of the residents and the dusting generated by the pipeline construction will
influence the living quality of the residents living along the line.
The construction of the project will increase the sewage treatment rate and improve the
urban environment so the operation of the project will place positive impact on social
environment.
9.4 Conclusion for pollution prevention and abatement
and mitigation measures
9.4.1 Prevention and abatement measures for surface water
pollution
1. The results of the projection show that in the source area the pollutant average
maximal concentration reaches 9.88mg/L; it is close to the limit value of Class IV water body
standard, therefore, the effluent discharge and sewage treatment degree should be controlled. .
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2. The separation of sewage and storm water will be carried out in the plant area;
3. The concerned departments should strengthen the supervision to the key pollution
sources in the service area and supervise and urge the enterprises to enhance the prevention
and abatement work and management and maintain of the facilities for pollution prevention
and abatement to promote the operation rate of the facilities and make the sewage entered into
the municipal sewers to reach the standard of the influent of Jiangtongnanqu WWTP and
"Water Quality Standard for Sewage Discharged into the Municipal Sewer" .
4. The outfall will adopt the submerged discharge type and the outfall should be extent
and forbidden discharge at bank:
5. In order to ensure the safety of the navigation route and the bottom pipes, the
following measure should be adopted: 1 set up navigation marks; 2 the extending length of
the outfall should not influence the traffic of the navigation route: 3 set up anchor marks to
protect the safety of the bottom pipes;
6. Strictly prevent accidental discharge of the WWTP
9.4.2 Prevention and abatement for ambient air pollution
1. Set up sanitary protection distance. The distance is 300 m
according to calculation.
2. Within the protection distance, the residential area should be
forbidden and the villagers in the area should be moved.
9.4.3 Prevention and abatement measures for acoustic
environment
1. The noise pollution construction works, which affect the residents, will be
forbidden after 22:00 PM. If the special need for conducts the noise pollution operation at
night., the application form should be filled in advance and submitted to the
administration department for approval. The operation can be conducted only after the
"License for Night Operation" obtained and the operation should be carried out
according to the requirements of the license.
2. Sound insulation and noise reduction measures should be taken for blower
and pump house in the WWTP; set up vibrating isolation tray and noise elimination
elbows and the wall of the pump house should be decorated with sound absorbing
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materials.
3. The double deck windows should be used for pumping station and close doors
and windows while pumping and the machine room should be decorated with sound
absorbing materials.
9.4.4 Solid waste impact and prevention and abatement
measure
1. The tankcar to be used for sludge transportation to avoid dropping and leaking on the
way;
2. The dehydrated sludge will be transported to Fenglin Garbage Incineration Plant for
landfill. Such disposal will last for 3 years and the sludge will be transport to the new landfill
site after it is finished.
9.4.5 Prevention and abatement measures for social
environmental impact
lAccording to the related policies and measures for resettlement and compensation by
the state and local government, the affected people will be compensated and resettled properly
and their income and living standard will not be reduced;
2, Make contact with departments of communications and navigation while carrying out
pipeline construction ; The construction should be done by stages to ensure normal order of
traffic and navigation;
3. During the construction pipeline, water the roads, which the construction vehicles
passing to prevent dusting impact on the residential area or other sensitivity areas.
9.4.6 Ecological environmental pollution and prevention
abatement measure
1. Resume the vegetation and landscape damaged during the construction stage,
2. Strictly control the industrial sewage ,especially the industrial sewage contenting
heavy metals according to the requirements of "Water Quality Standard for Sewage
Discharged into the Sewer" CJ 3082-1999 and " Integrated Sewage Discharge Standard
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
"Gb8978-1996 to make stable of the water quality of the effluent discharged from the
WWTP.
3. The pollutants of ammonia nitrogen and total P exceed the standard in Yong River and
Fenghua River It is suggested that concerned departments to make further survey and put
forward relevant measure for prevention and abatement to avoid eutrophication of the waters.
9.5 Environmental management and monitoring plan
9.5.1 Environmental monitoring plan
The main impact on the ambient environment in the operation stage for the
WWTP will he the effluent discharge and sludge, therefore in the operation stage
the priority of environment monitoring is to monitor the water quality of water
environment surrounding the WWTP
I'here are three monitoring points which is located in up reaches 50Gm from
the outfall, outfall and down reaches 500m from the outfall. The inland
monitoring point is set up near the eastern bridge .'The sludge generated from
the WW'I'P wil] he monitored once a month. The inlet and outfal.l will he monitored
three times each day.
9.5.2 Environment Management
The Environmental Protection Division will be established, under which is a laboratory
to be in charge of work of environmental management and monitoring. Set up anchor ban
marks in outfall and bottom pipes area. Set up sanitary protection distance insulation belt.
9.6 Final Conclusion
The guideline of " design, construction and put into production simultaneously" should
be carried out for the project. Through strengthen the supervision and management to control
the impact on the environment in a limit range. The completion of the project will produce
obvious social benefit and economic benefit for the urban construction and economic
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development of the city of Ningbo. To sum up, it is feasible in the aspect of environment.
protection for Jiangtongnanqu WWTP and Sewerage Project.
10.REFERENC
I.Guo jing, Analysis and Accessment of Effluvium pollution status of WWTP. 2001.10
2.Shao Lin gong, Selection Technical Process of Sewage Treatment in Northen City WWTP.
3.Shang Zijie, Dranage Works. Beijing: Chinese publication of Achitecture industry 1996
4.Zhang Minqin, Search Development of Sludge Effective Utiliation. 2000
5.Chen Tao, Selection the Proper Utilized Measure of Sludge
6. LI Guoding, Exploiting and Using of Solid Wastes Resource.
7.Huang Mingrong, Treating engineering for Water Pollution
8.Zhang XiangShu, Environmental economics. 1994
9.Exploting the Urban Sewage Resource. 1984.1
10.Zhang Runxian, Recent Urban Sewage Socializing and the Fact of Integrated Contral.
I I.Wu Shanyang, Treatment of Urban Sewage- Investment and Decision.
11. APPEND FILES
1. Project geographic position graphic(1:75000)
2. Project function position graphic to monitor(1:75000)
3.Arrangement plan of factory area(l :100000)
4.Noise forcasting result graphic
5.Arrangement graphic of main pollutants discharged into Yong River
6.Arrangement graphic of main Pollutants discharged into Fenghua River
7. "Entrust Letter of EIA Work for Nlngbo Jiangdongnanqu WWTP and Sewerage Project"
issue by Ningbo Urban Infrastructure Development Office on the 29t", dec,1999
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
Registration Form for Approval of the Environment Protection Project
Person handling approval
Project Ningbo Jiangdongnanqu WWTP and Construct South of Jiangdong
name Sewerage Project ion site District of Ningbo
Project PostProJect Cod 315400 Tel
unit
Sector L Project New Nexpansion technicalnature renovation
Construction 160000m3/d capacity Report Report
. ~~~~~~~~typecapacity t
Department for Do Timset up the project c. e
Approval National Do
department for the Environmental c.N TimProtection e
report Administration o.
Total investment 402114600 EA 402114600 100%
of the project Y investment 4
Uni toprepa Research &Design Academyte tpreport of Environmental Protection EA cost Yuanthe re port of Ningbo
EnvironmentEnvironmental quality current quality Discharge standard
status qalyDshresadrstandard
Ambient Conforms to Class II of GB3095-1996 GB9078-1996 Class II
air Ambient air Class II
Surface Exceeding GB3838-2002 GB3838-2002 GB8978-1996 Class II
water Class IV Class IV
Groundwater
Noise Conforms to GB3096-93 GB3096-93 GB12348-90 Class
N Is Class3 standard Class 3 III
Pollution control indicators
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
Treat Perment mrse
Gene rent Substit Discha Permis Regi Conce Ptje iblerated tion ute old rge Total sible onal ntrac ction disc
Existi volu with increa dischContr m volu discha discha reduc n prior harg
ol disncgha n me in reducti rseduce rge rge e to aonge eitem newl volum volum volu treatm conc
rge (1) Y Y on volum e e•, e me ent ntrati entrbpuairlt built volu4)m e (6) (7) (8) (9) On atio
(2) part (10) n(3) (11)
Waste 0 5840 0 0 5840 5840
water
CdLead = = = ===Arsenic _ _
Sexavalen
t
chrome
Cyanide__ _ __ _
COD 0 9373. 2365. 0 7008 70082 2 _
oilWast
e as502 = =_ __ __ = =
DustSmok
eSolidwaste 0 8.9 0 0 8.9 8.9
s.
Unit : waste gas volume X104 M3/Y; waste water, solid wastes: 104t/y;Hg, Cd, lead, arsenic, sexavalent chrome, cyanide: 103/y; others: t/y
waste water concentration: mg/L; waste gas concentration: mg/m3;
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Ningbo Jiangdongnanqu WWTP & Sewerage Project EIA
Note: The form to be filled in by EA unit attaching in the last page of the report The
last case of the form is the character pollutant of the project, of which : (5)=(2) -
(3) - (4) : (6) = (2)-(3)+(1)-(4)
238