Sewerage DepartmentNur syazana binti ahmad zulkifli

Scope of Work Calculate the Population Equivalent for this

convention centerProposed the suitable sewage treatment

plant.Design the proper pipe to discharge sewage

from building to the sewerage treatment plant.

Design the system of the treatment.Decided the area for treatment plant to be

placedManage the solid waste from the

development

Objective

To treat the sewage to meet the standard, which is can be safely discharged to the environment or reused.

To prepare the suitable sewerage treatment plant method.To provide an economic sewerage system which is profitableTo design the size of pipe for sewer and manhole size.To propose the suitable method for sewage treatment method. 

Guideline  Guidelines for Developers Volume 4 , Sewerage Treatment

PlantsPart 1 (General Introduction ,Definition Design Consideration). 

Population EquivalentType of premises

Number Recommended population equivalent

Total populationEquivalent

Public toilet 8 15 per toilet 120

surau 100 0.2 per person 20

Swimming pool 150 0.5 per person 75

Number of room

432 4 per room 1728

Commercial Area

10188 3 per 100 m² gross area

305.64

Total population equivalent = 2264 capita

Size of pipelines and manholeType of pipe Size of pipe

(diameter)

Unplasticised polyvinyl chloride (uPVC)•From toilet to manhole

130 mm

Vitrified clay•From manhole to manhole

300 mm

Precast concrete Manholes 1000 mm

LOCATION FOR MANHOLE AND PIPELINE

Size for STP

TYPE OF TREATMENT SIZE m × m

Primary Screen 1.2m, 0.4m , 0.95m

Pump Station 6m ,3 m,2m

Secondary Screen 1.2m ,0.4 m,0.95m

Grit Chamber 4m , 2m,1m

Grease Chamber 4 m, 2m , 1m

Balancing Tank 2m ,6 m,2.5m

Primary Sedimentation Tank 15m ,5m , 2.5m

Aeration Activated Tank 10m ,5m ,4m

Secondary Sedimentations Tank 15 m, 5m , 3.5m

Sludege Treatment 3m,1m,5m

Sewerage Treatment Plant

EXAMPLE OF CALCULATION

Location for Sewage treatment plant

Solid waste management

Objective

To manage the waste that discharge from building and human activity.

To prepare the solution for solid waste management

Flow of solid wasteSolid waste from

building

store in Molok

Transfer to Pulau Burung Sanitary

fill

Deep collection container Molok •Waste container in the ground•Stored the solid waste from development before it will be collect.

AdvantagesLess space usingHigh collecting capacity, 4 to 5 times greater

capacity than the same area's surface bins.Reducing the odor problem (the coolers of

ground will reducing the development of bacteria)

Calculation for Molok Solid waste collection: Waste generated by person : 0.5kg/dayThe population equivalent Number of maximum customer : 2500 personNumber of hotel room : 432 rooms

Total population = 25000 + 432 =2932 kg/day Total waste quantity produce per day = 0.5 × 2932

= 1466 kg/ day Truck collection per week = 2 time per week  In 4 days the total solid waste will be produced = 4 × 1466 = 5864 kg/ day 

Density of waste = 200 kg/day m³ Total solid waste will be collect every 4 days = 5864/200 = 29.3 m³ Number of MOLOK needed to be provided   Molok volume = 5 m³ 

The percentage of space will be using for 1 molok = 80%  = 0.8 × 5

= 4 m³ The volume of molok need to be used. = 4 + 5

= 9 m³ The number of molok that will be used = 29.3 /9 

= 3.25 ~ 4

Type of bin and totalType of bin Number

Recycle bin Each car park > 2Each recreation park > 1Bus parking > 1

Commercial use Every floor of commercial area (every 50 m distance)

Hotel room 1 for each room

Progress of workwork

Calculate PE done

Type of treatment plat done

Design STP done

Design sewer , pipe and manhole Almost done

Decide location of STP done

Solid waste management done