Combined Sewer Overflow (CSO) Treatment With Constructed ...
Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics...
Transcript of Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics...
![Page 1: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/1.jpg)
Combined Sewer Overflow (CSO) Treatment Technology Evaluation
Bob BucherKing County DNRP-WTDTechnology Assessment Program
Fall Science Seminar
October 27, 2009
![Page 2: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/2.jpg)
Project Background
King County CSO Program Planning
![Page 3: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/3.jpg)
Recommendations from CSO Control Plan Review
• Conventional Primary stillremains first choice for treatment
• Pilot High Rate Sedimentation processes
Sluice Gate
Control Room &Odor Control
OverflowWeir
CSO Influent
![Page 4: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/4.jpg)
Primary Treatment Hydraulics
Surface Overflow Rate (SOR)Volume of wastewater treated per square foot of treatment liquid surface area (gallons per day per square foot, or gpd/sf)
![Page 5: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/5.jpg)
Treatment Process Performance
• CSO Treatment Standards– TSS– Fecal Coliform– Settleable Solids
• Water Quality-Based Permit Limits– Metals– Ammonia– Chlorine
• Sediment-Based Permit Limits
![Page 6: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/6.jpg)
Pilot Testing of CSO Treatment Alternatives(Previous King County Experience)
Densadeg – 2001 Actiflo – 2001
![Page 7: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/7.jpg)
Pilot Testing of CSO Treatment Alternatives(Current Test Program – West Point)
![Page 8: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/8.jpg)
Pilot Testing of CSO Treatment Alternatives(Current Test Program – West Point)
Conventional Overflow Weir
Lamella Plates
Chemical Enhanced – addition of coagulant (PAX 18) and polymer (anionic)
![Page 9: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/9.jpg)
Pilot Testing of CSO Treatment Alternatives(What are Lamella Plates?)
Lamella plates increase a basin’s effective settling area. Each lamella plate settler provides an effective settling area equal to that of its horizontal projection.
Source: http://www.meurerresearch.com/plate_theory.html
![Page 10: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/10.jpg)
West Point Pilot - Test Trialso Dye Testing
o West Point Primary Comparison
o Chemical Optimization
o Capacity Testing
o Dilution Testing
o Performance Testing
o Hydrograph Testing
![Page 11: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/11.jpg)
Chemical Optimization Test TrialTrial 13D
0
20
40
60
80
100
120
0 4 8 12 16 20 24PAX 18 dose (mg/L)
% re
mov
al
Conv TSS Plate TSS Conv Turbidity Plate Turbidity
![Page 12: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/12.jpg)
Dilution Test Trial
0%
20%
40%
60%
80%
100%
0 20 40 60 80 100 120Influent TSS (mg/L)
% R
emov
al
CEPCCE-LamellaPCLamella
SOR: PC: 1900 gpd/sq Lamella: 19000 gpd/sfDosing: PAX-18: 16 mg/L Nalco: 1mg/L
![Page 13: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/13.jpg)
Capacity Test Trial
≈ 3,700 gpd/sf≈ 3,700 gpd/sf
≈ 23,000 gpd/sf≈ 23,000 gpd/sf
PAX 18 coagulant = 12 mg/LAnionic polymer = 1.5 mg/L
![Page 14: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/14.jpg)
Performance Test TrialTrial 33
0
5
10
15
20
25
30
35
10/14/2009 11:45 10/14/2009 12:15 10/14/2009 12:45 10/14/2009 13:15 10/14/2009 13:45 10/14/2009 14:15
Time
Turb
idity
(FN
U)
Influent Conv Effluent Plate Effluent
PAX18 = 12 mg/LNalclear 7768 = 1.5 mg/L
Conv SOR = 6,800 gpd/sfPlate SOR = 23,000 gpd/sf
start influent sampling
start effluent sampling
Additional Sampling for metals, nutrients, and trace organics.
![Page 15: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/15.jpg)
Hydrograph Test TrialPeak Run Hydrograph
0
50
100
150
200
250
300
350
400
0:00 0:28 0:57 1:26 1:55 2:24 2:52 3:21
Time from RunStart
Flow
, gpm
![Page 16: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/16.jpg)
Testing Schedule and Final Report
Performance / Hydrograph testing through early November.Final Report in January 2010.
![Page 17: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/17.jpg)
Acknowledgementso King County
o CSO Program
o West Point Process Group
o West Point Process Laboratory
o West Point Maintenance Staff
o Environmental Laboratory
o CDM
![Page 18: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/18.jpg)
Combined Sewer Overflow (CSO) Treatment Technology Evaluation
Bob BucherKing County DNRP-WTDTechnology Assessment Program
Fall Science Seminar
October 27, 2009
![Page 19: Combined Sewer Overflow (CSO) Treatment Technology Evaluation · Primary Treatment Hydraulics Surface Overflow Rate (SOR) Volume of wastewater treated per square foot of treatment](https://reader031.fdocuments.us/reader031/viewer/2022011817/5e7b6cd76371fd4bae0ba804/html5/thumbnails/19.jpg)
Pilot Testing of CSO Treatment Alternatives(Current Test Program – West Point)
INLET OUTLET
OUTLET
Flocculation Zone Sedimentation Zone