new jersey american water company dbp reduction plan for jumping brook wtp · 2020. 7. 30. ·...
TRANSCRIPT
NJAWWA Webinar SeriesAugust 4, 2020
Investigation of Alternatives to Reduce DBPs at New Jersey American Water Company Jumping Brook WTP
2
Jumping Brook WTP
3
Jumping Brook PFD
4
NJAWC Jumping Brook WTP
Solids Contact Clarifier
Purification Units
FiltersClearwells
Thickeners
WashwaterClarifiers
Filter Press
5
Problem Statement
• Compliance with Stage 2 D/DBP Regulation
• A change in raw water quality resulted in an exceedance of TTHMs Operational Evaluation Level (OEL) at some sites in 2018
• Short term and Long term solutions needed
6
Flow
0
5
10
15
20
25
30
35
Flo
w (
mgd
)
NJSB-21 Well 6 NJSB-72 Well 7 Shark River Withdrawal Glendola Reservoir
7
Raw TOC
0
1
2
3
4
5
6
7
Org
anic
Car
bo
n (
mg/
L)
PU TOC (mg/L) PU DOC (mg/L) SCC TOC (mg/L) SCC DOC (mg/L)
8
DBP – Jumping Brook Effluent
• TTHMs • HAAs
0
20
40
60
80
100
120
2/9
/20
15
5/1
1/2
01
5
8/1
0/2
01
5
11
/9/2
01
5
2/8
/20
16
5/9
/20
16
8/8
/20
16
11
/7/2
01
6
2/6
/20
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5/8
/20
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8/7
/20
17
11
/6/2
01
7
2/5
/20
18
5/8
/20
18
8/6
/20
18
11
/6/2
01
8
Tota
l TH
Ms
(ug/
L)
Sampling Date
0
5
10
15
20
25
30
35
2/9
/20
15
5/1
1/2
01
5
8/1
0/2
01
5
11
/9/2
01
5
2/8
/20
16
5/9
/20
16
8/8
/20
16
11
/7/2
01
6
2/6
/20
17
5/8
/20
17
8/7
/20
17
11
/6/2
01
7
2/5
/20
18
5/8
/20
18
8/6
/20
18
11
/6/2
01
8
Tota
l HA
As
(ug/
L)
Sampling Date
9
Project Goals
• Identify an immediate term (2 months) approach to comply with OEL
• Assess short and long term options for ongoing compliance
• Identify option for Stage 2 D/DBP compliance while maintaining primary disinfection
10
Project Goals
• Assess a wide range of alternatives
• Select alternative that provides the greatest value for the investment based on the project-specific goals.
• Constraints
ꟷMaintain primary disinfection ahead of filters
ꟷChloramine disinfection in distribution
ꟷOxidant needed for Mn
A defensible, comprehensive decision model was used to evaluate and rank the options
11
Project Approach• Frame the Project
• Identify Treatment Alternatives (22)
• Rate performance against goals
• Rank treatment alternatives with Weighted Criteria
• Develop Conceptual Designs and Costs (10)
• Prepare Cost/Benefit Analysis
Project executed in 7 months, with short term
alternatives identified in month 3
12
Developing Alternatives
Short Term Operational Changes
1 - Eliminate pre-chlorination. Provide alternate method for primary disinfection.
Permanganate or alternate oxidant.
2 - Provide additional TOC removal andmaintain current chlorine application as oxidant and disinfectant
4 - Major physical plant/process changes
5 – Shark River treatment
13
Short Term Operations• Application of PAC to raw water at Glendola Reservoir location is ongoing
• Install GAC in dual media filters for THM adsorption
• Limit use of Shark River - install on-line TOC monitoring and analyze rainfall data could enable a more selective use of this source
14
22 Options Rated
Treatment Change Alternative Treatment DescriptionShort-Term /
Long-Term
Alternative1A Chlorine dioxide at reservoir with pipeline contactor for
oxidation/disinfection1 Short-Term/Long-Term
1B Ozone at reservoir with pipeline contactor Long-Term
1Ca Pre-UV at reservoir with permanganate addition on plant raw
water for oxidation. Chlorine applied to clearwell. Long-Term
1Cb Post-UV downstream of clearwells with permanganate
addition on plant raw water for oxidation. Chlorine applied to
clearwell. Long-Term
1D Permanganate at intake for oxidation. Chlorine after filters.
New clearwell across the street from the plant, maintain
chlorine for disinfection Long-Term
2A Permanganate at intake for oxidation. Ferric chloride as
alternate coagulant1 Short-Term
2B PAC addition at reservoir seasonally1 Short-Term
2C MIEX at reservoir Long-Term
2D MF/UF and NF/RO at reservoir Long-Term
2E Anion Exchange at reservoir Long-Term
3A Change GAC filter media annually1 Short-Term
3B Discontinue Shark River use Short-Term
4Aa
New clarification process (e.g., DAF)/Ozone/Additional filters Long-Term
4Ab New clarification process (e.g., DAF)/Chlorine
Dioxide/Additional filters Long-Term
4Ac Permanganate/New clarification process (e.g.,
DAF)/Intermediate Chlorine/Additional filters Long-Term
4B Permanganate/New clarification process (e.g.,
DAF)/MF/UF/Chlorine Long-Term
4C NF/RO downstream of existing clarification - partial stream
treatment for DBP removal Long-Term
4D GAC adsorbers post-filtration - partial stream treatment for
DBP removal Long-Term
5A GAC with solids removal pretreatment (MF) Long-Term
5B Ozone on Shark River to plant Long-Term
5C MF/UF and NF/RO on Shark River to Glendora reservoir Long-Term
5D MIEX on Shark River to Glendora reservoir Long-Term
2 - Provide additional TOC removal and
maintain current chlorine application as
oxidant and disinfectant
5 - Provide treatment for Shark River only
including feed to Glendola Reservoir2
1 - Eliminate pre-chlorination. Provide
alternate method for primary
disinfection. Permanganate or alternate
oxidant.
4 - Major physical plant/process changes
3. Plant operation changes
UV, ClO2, ozone, new clearwell
PAC, MIEX, membranes
DAF + ozone or ClO2,Membranes, GAC adsorbers
Ozone, membranes, MIEX
15
Assessment Criteria and Weighting Values
Stage 2 D/DBP Compliance Compliance
10
Ease of Operation 7
Flexibility for Future Regulatory 7
Limit Residuals Production 7
Footprint 6
Hydraulic Impacts 5
Ability to Address Manganese 5
16
Top Ranked Alternatives by Treatment CategoryWeighting 10 7 7 7 6 5 5
Treatment Change Alternative Treatment DescriptionStage 2 D/DBP
Compliance
Ease of Operation
Flexibility for Future
Regulations
Limit Residuals
ProductionFootprint
Hydraulic Impacts
Ability to Address
Manganese
% of Total Points
1 - Eliminate pre-chlorination. Provide alternate method for primary disinfection. Permanganate or alternate oxidant.
1B Ozone at reservoir with pipeline contactor 5 1 3 5 5 5 35 77.9%
1CaPre-UV at reservoir with permanganate addition on plant raw water for oxidation. Chlorine applied to clearwell.
3 1 3 5 5 3 3 65.1%
1DPermanganate at intake for oxidation. Chlorine after filters. New clearwell across the street from the plant, maintain chlorine for disinfection
1 3 1 5 1 1 3 42.1%
2 - Provide additional TOC removal and maintain current chlorine application as oxidant and disinfectant
2C MIEX at reservoir1 4 1 1 31 5 3 1 53.2%
2D MF/UF and NF/RO at reservoir 44 1 34 1 5 1 4 55.3%
4 - Major physical plant/process changes
4Aa New clarification process (e.g., DAF)/Ozone/Additional filters 5 1 3 3 3 3 5 66.8%
4B Permanganate/New clarification process (e.g., DAF)/MF/UF/Chlorine 5 1 3 3 3 3 4 64.7%
5 – Shark River treatment
5B Ozone on Shark River to plant 23 1 3 5 5 3 3 60.9%
5C MF/UF and NF/RO on Shark River to Glendora reservoir 3 1 3 12 5 1 3 48.9%
5D MIEX on Shark River to Glendora reservoir 3 1 1 3 5 3 1 48.9%
Ranking is completed on merits – cost comes in later
17
Alternative 1B: Ozone at Reservoir, Eliminate Pre-Chlorine
Glendola Reservoir
Distribution
Filter Press
Solids Contact Clarifiers
Filters
Purification Units
Clearwell 2
Clearwell 1
Washwater Clarifiers
Thickeners
OZO
NE
Shark River
Intake PSP
AC
L
CH
LOR
INE
PO
LYM
ER
CA
US
TIC
PA
CL
CH
LOR
INE
PO
LYM
ER
CA
US
TIC
FLU
OR
IDE
CA
US
TIC
PH
OS
PH
OR
IC
AC
ID
CH
LOR
INE
(U
SE
E
XIS
TIN
G)
CH
LOR
INE
AM
MO
NIA
FLU
OR
IDE
CA
US
TIC
PH
OS
PH
OR
IC
AC
ID
CH
LOR
INE
(N
OT
US
ED
)
CH
LOR
INE
AM
MO
NIA
PE
RM
AN
GA
NA
TE
18
Alternative 1B: Ozone at Reservoir, Eliminate Pre-Chlorine Layout
19
Alternative 1Ca: UV at Reservoir, Eliminate Pre-Chlorine
Glendola Reservoir
Distribution
Filter Press
Solids Contact Clarifiers
Filters
Purification Units
Clearwell 2
Clearwell 1
Washwater Clarifiers
Thickeners
CH
LOR
INE
(U
SE
E
XIS
TIN
G)
PE
RM
AN
GA
NA
TE
Shark River
UV
Intake PSP
AC
L
PO
LYM
ER
CA
US
TIC
PA
CL
PO
LYM
ER
CA
US
TIC
FLU
OR
IDE
CA
US
TIC
PH
OS
PH
OR
IC
AC
ID
CH
LOR
INE
CH
LOR
INE
AM
MO
NIA
FLU
OR
IDE
CA
US
TIC
PH
OS
PH
OR
IC
AC
ID
CH
LOR
INE
AM
MO
NIA
CH
LOR
INE
CH
LOR
INE
20
Alternative 1Ca: UV at Reservoir, Eliminate Pre-Chlorine Layout
21
Alternative 5B: Ozone at Shark River
Glendola Reservoir
Distribution
Filter Press
Solids Contact Clarifiers
Filters
Purification Units
Clearwell 2
Clearwell 1
Washwater Clarifiers
Thickeners
Shark River
Intake PS
PA
CL
CH
LOR
INE
PO
LYM
ER
CA
US
TIC
PA
CL
CH
LOR
INE
PO
LYM
ER
CA
US
TIC
FLU
OR
IDE
CA
US
TIC
PH
OS
PH
OR
IC
AC
ID
CH
LOR
INE
(N
OT
US
ED
)
CH
LOR
INE
AM
MO
NIA
FLU
OR
IDE
CA
US
TIC
PH
OS
PH
OR
IC
AC
ID
CH
LOR
INE
(N
OT
US
ED
)
CH
LOR
INE
AM
MO
NIA
OZO
NE
22
Alternative 5B: Ozone at Shark River Layout
23
Comparative Cost Estimate
Treatment Change Alternative Treatment Description % of Total Points Capital Cost O&M CostNet Present
Value*Benefit/Cost (Benefit/$M)
1 - Eliminate pre-chlorination. Provide alternate method for primary disinfection. Permanganate or alternate oxidant.
1BOzone at reservoir with pipeline contactor with permanganate addition.
77.9% $ 22,661,847 $ 418,000 $ 30,855,000 2.5
1CaPre-UV at reservoir with permanganate addition on plant raw water for oxidation. Chlorine applied to clearwell.
65.1% $ 13,266,630 $ 143,000 $ 16,069,000 4.1
1DPermanganate at intake for oxidation. Chlorine after filters. New clearwell across the street from the plant, maintain chlorine for disinfection
42.1% $ 17,984,031 $ 221,000 $ 22,316,000 1.9
2 - Provide additional TOC removal and maintain current chlorine application as oxidant and disinfectant
2C MIEX at reservoir 53.2% $ 41,506,569 $ 1,439,000 $ 69,712,000 0.8
2D MF/UF and NF/RO at reservoir 55.3% $ 95,103,528 $ 5,144,000 $ 195,928,000 0.3
4 - Major physical plant/process changes
4AaNew clarification process (e.g., DAF)/Ozone/Additional filters
66.8% $ 71,759,688 $ 763,000 $ 86,715,000 0.8
4BPermanganate/New clarification process (e.g., DAF)/MF/UF/Chlorine
64.7% $ 83,991,453 $ 2,715,000 $ 137,207,000 0.5
5 – Shark River treatment5B Ozone on Shark River to plant 60.9% $ 17,391,387 $ 253,000 $ 22,350,000 2.7
5D MIEX on Shark River to Glendora reservoir 48.9% $ 20,318,415 $ 473,000 $ 29,589,000 1.7
24
Benefit/Cost Analysis
$M
$20M
$40M
$60M
$80M
$100M
$120M
$140M
$160M
$180M
$200M
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
Ozo
ne
at
rese
rvo
ir
Pre
-UV
at
rese
rvo
irw
ith
per
man
gan
ate
Ne
w c
lear
we
ll
MIE
X a
t re
serv
oir
MF/
UF
and
NF/
RO
at
rese
rvo
ir
DA
F/O
zon
e/
Ad
dit
ion
al f
ilte
rs
Per
man
gan
ate
/DA
F/M
F/U
F/C
hlo
rin
e
Ozo
ne
on
Sh
ark
Riv
er
MIE
X a
t Sh
ark
Riv
er
1B 1Ca 1D 2C 2D 4Aa 4B 5B 5D
Ne
t P
rese
nt
Val
ue
($
M)
Be
ne
fit
Co
st (
Be
ne
fit/
$M
)
25
Next Steps• TOC analyzer is in place on Shark River
• PAC continues to be fed at the source
• The findings for long-term treatment options are being used by NJAW in long term master planning for their Coastal North Water System.
26
Questions
Thank you!
Linda Wancho
Chris Olson
28
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Copyright
July 28, 2020
Jacobs Engineering Group Inc. All rights reserved.
©
29
Forward-Looking Statement DisclaimerStatements included in this presentation that are not based on historical facts are forward-looking statements. Although such statements are based on management’s current estimates and expectations, and currently available competitive, financial and economic data, forward-looking statements are inherently uncertain and you should not place undue reliance on such statements as actual results may differ materially. We caution the reader that there are a variety of risks, uncertainties and other factors that could cause actual results to differ materially from what is contained, projected or implied by our forward-looking statements. For a description of some of the risks, uncertainties and other factors that may occur that could cause actual results to differ from our forward-looking statements see our Annual Report on Form 10-K for the period ended September 26, 2014, and in particular the discussions contained in Item 1 – Business, Item 1A - Risk Factors, Item 3 – Legal Proceedings, and Item 7 –Management’s Discussion and Analysis of Financial Condition and Results of Operations, as well as the Company’s other filings with the Securities and Exchange Commission. We also caution the readers of this presentation that we do not undertake to update any forward-looking statements made herein.