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Retrofitting Control Facilities for Wet-Weather Flow Control
Available technologies were evaluated to demonstrate the feasibility and cost-effectiveness of retrofitting existing facilities to handle wet-weather flow. Cost/benefit analysis were performed by comparing retrofits to construction of new conventional control and treatment facilities. Desktop analyses were performed for 13 separate retrofit examples for 1) converting or retrofitting primary settling tanks with lamellae and/or microsand-enhanced plate or tube settling units, 2) retrofitting existing wet-weather flow storage tanks to provide enhanced settling/ treatment and post-storm solids removal, 3) converting dry ponds to wet ponds for enhanced treatment, 4) retrofitting wet-weather flow storage tanks for dry-weather flow augmentation, 5) sanitary sewer overflow control using storage, 6) retrofitting for industrial wastewater control in a combined sewer system, and 7) putting outdated/abandoned treatment facilities back online as wet-weather flow (WWF) treatment facilities. This analysis demonstrated that retrofitting existing WWF facilities can be technically feasible in most cases and may be more cost-effective than construction of new conventional control and treatment facilities. The feasibility and cost effectiveness of retrofitting was found to be a function of site-specific conditions and treatment requirements. Retrofitting processes will better enable communities to meet the U.S. Environmental Protection Agency's National Combined Sewer Overflow Policy and stormwater permitting program requirements.
Retrofitting Control Facilities for Wet-Weather Flow Control
Available technologies were evaluated to demonstrate the feasibility and cost-effectiveness of retrofitting existing facilities to handle wet-weather flow. Cost/benefit analysis were performed by comparing retrofits to construction of new conventional control and treatment facilities. Desktop analyses were performed for 13 separate retrofit examples for 1) converting or retrofitting primary settling tanks with lamellae and/or microsand-enhanced plate or tube settling units, 2) retrofitting existing wet-weather flow storage tanks to provide enhanced settling/ treatment and post-storm solids removal, 3) converting dry ponds to wet ponds for enhanced treatment, 4) retrofitting wet-weather flow storage tanks for dry-weather flow augmentation, 5) sanitary sewer overflow control using storage, 6) retrofitting for industrial wastewater control in a combined sewer system, and 7) putting outdated/abandoned treatment facilities back online as wet-weather flow (WWF) treatment facilities. This analysis demonstrated that retrofitting existing WWF facilities can be technically feasible in most cases and may be more cost-effective than construction of new conventional control and treatment facilities. The feasibility and cost effectiveness of retrofitting was found to be a function of site-specific conditions and treatment requirements. Retrofitting processes will better enable communities to meet the U.S. Environmental Protection Agency's National Combined Sewer Overflow Policy and stormwater permitting program requirements.
Retrofitting Control Facilities for Wet-Weather Flow Control
O'Connor, Thomas P. (author) / Goebel, Howard M. (author)
Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000 ; 2000 ; Minneapolis, Minnesota, United States
Building Partnerships ; 1-10
2000-09-11
Conference paper
Electronic Resource
English
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