Using Existing Facility to Maximize the Wet Weather Treatment Capacity of the Akron, Ohio, Water Reclamation Facility: Operating Step Feed and Improved Clarifiers to Process Peak Flow

Abstract Long column settling and jar tests were undertaken as part of a treatability study of combined sewage at the Lou Romano Water Reclamation Plant (LRWRP) in Windsor, Ontario. Different types of cationic polymers were examined in jar tests, and the appropriate dosage and its relationship with the TSS removal were determined for the polymer coagulation process. Settling column tests were used to develop settling rate distribution curves under both chemically aided and unaided conditions, and to examine the performance of polymer coagulation in improving the settleability of wet-weather sewage during CSO events. The results of the long column settling tests for settling rate distributions show that the characteristics of the wet-weather sewage at the LRWRP during CSO events were similar to those of samples collected at actual overflow sites along the Windsor Riverfront. Settling rate distributions demonstrated that polymer addition to the wet-weather sewage significantly improved the settling characteristics.

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Using Existing Facility to Maximize the Wet Weather Treatment Capacity of the Akron, Ohio, Water Reclamation Facility: Sludge Settling Theory and State Point Analysis Do Not Characterize Ultimate Capacity of Shallow Clarifiers

Proceedings of the Water Environment Federation ◽

10.2175/193864715819539911 ◽

2015 ◽

Vol 2015 (16) ◽

pp. 5259-5281

Author(s):

John S Siczka ◽

Thomas F Smith ◽

Eugenie M Hanna ◽

Glen T Daigger ◽

James P Cooper ◽

...

Keyword(s):

Water Reclamation ◽

Ultimate Capacity ◽

Point Analysis ◽

State Point ◽

Wet Weather ◽

Sludge Settling

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Determining a Consistent Peak Flow Level of Control for a Wet Weather Management Plan

Journal of Water Management Modeling ◽

10.14796/jwmm.r228-23 ◽

2008 ◽

Author(s):

Hazem Gheith ◽

◽

Matthew Davis ◽

Tim Fallara ◽

Taymour El-Hosseiny ◽

...

Keyword(s):

Peak Flow ◽

Management Plan ◽

Wet Weather

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Dry and wet weather microbial characterization of the Chicago area waterway system

Water Science & Technology ◽

10.2166/wst.2009.598 ◽

2009 ◽

Vol 60 (7) ◽

pp. 1847-1855 ◽

Cited By ~ 17

Author(s):

G. Rijal ◽

C. Petropoulou ◽

J. K. Tolson ◽

M. DeFlaun ◽

C. Gerba ◽

...

Keyword(s):

Weather Conditions ◽

Indicator Bacteria ◽

Water Reclamation ◽

Combined Sewer Overflows ◽

Salmonella Spp ◽

Chicago Area ◽

Treated Effluent ◽

Microbial Characterization ◽

Wet Weather

The Chicago Area Waterway System (CAWS) is a man-made channel, which serves the Chicago area for the drainage of urban storm water and the conveyance of secondary treated effluent from the Metropolitan Water Reclamation District of Greater Chicago's (District) North Side, Stickney and Calumet water reclamation plants (WRPs). A microbial characterization of the CAWS upstream and downstream of the WRPs and from the WRP outfall was initiated by collecting dry and wet weather samples and analyzing for indicators and pathogens. During dry weather, indicator bacteria (fecal coliform [FC], E. coli [EC], enterococci [EN]) were the most abundant microbial species detected in the CAWS compared to pathogens (Salmonella spp [SA], enteric viruses [EV], adenovirus [AV], norovirus [NV] and Giardia and Cryptosporidium). Pseudomonas aeruginosa [PA] levels in the outfall samples were either lower or equivalent to the CAWS. The wet weather samples had a higher frequency of detection of indicator bacteria and pathogens compared to dry weather samples. Overall, the concentrations of pathogens in the CAWS, representing the weather conditions experienced in a recreational year, were relatively low. The study concluded that the presence of pathogens in the CAWS downstream of the WRPs were due to secondary loading of the waterway under wet weather conditions from combined sewer overflows (CSOs) and other discharges.

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