Optimizing Disinfection of Wet Weather Flows Not Receiving Biological Treatment

Arnett, Clifford J.; Boner, Mark; Gurney, Paula; Bowman, Jessica

doi:10.2175/193317707x224095

Cited by 1 publication

(2 citation statements)

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“…Both CoMF media were tested in Springfield, OH at a pilot facility (100 MGD, 10 gpm/ft 2 ) for CSO treatment where average effluent concentrations were 22 mg/L TSS and 26 mg/L CBOD 5 (Fitzpatrick et al, 2011). Another CoMF installation for CSO treatment in Atlanta, GA (10-27 gpm/ft 2 ), consistently achieved 90% TSS removal (Arnett et al, 2007).…”

Section: Filtrationmentioning

confidence: 99%

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Current and future approaches to wet weather flow management: A review

Peters

Zitomer

2021

Water Environment Research

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Sewers can become hydraulically overburdened during high‐intensity precipitation resulting in untreated water entering receiving streams. Combined (CSOs) and sanitary sewer overflows (SSOs) cause adverse public health and environmental impacts as well as management challenges for many wastewater utilities. This novel review presents information regarding wet weather flow regulation, impacts, and current management methods, and offers ideas for future approaches in the United States. Currently, storage followed by conventional municipal water reclamation facility treatment after precipitation events is often employed. Stand‐alone alternative technologies include high‐rate solids removal, rapid disinfection, filtration, and green infrastructure. However, most current stand‐alone approaches do not address soluble BOD5 or emerging contaminants in stormwater and wastewater. As the needs for wet weather flow management change, future approaches should include a goal of zero overflows and achieve effluent quality as good as or better than conventional treatment. To help achieve zero overflows and complete treatment, the “peaker facility” concept is proposed. The peaker facility often remains idle but treats excess flow when needed. Considering the challenges of remaining idle for long periods, starting up quickly, and handling high flows, chemical oxidation may be an applicable peaker facility component. However, more research and development are needed to determine best practices. Practitioner points Combined (CSO) and sanitary sewer overflows (SSOs) pose both environmental and public health risks as untreated water is discharged into lakes and rivers during high‐intensity rain events. Current stand‐alone approaches for managing or treating CSOs focus on particulate BOD/COD and solids removal, and do not typically address soluble BOD or emerging contaminants in stormwater and wastewater (including pathogens). New wet weather policies and regulations encourage more holistic approaches by wastewater utilities, and future approaches should include a zero‐overflow goal for all CSOs and SSOs. To help achieve zero overflows, the concept of the “peaker facility” is proposed. Chemical oxidation may be an applicable component of peaker facilities for its short detention time and ability to remove, oxidize, or inactive water impairment‐causing contaminants.

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Section: Filtrationmentioning

confidence: 99%

“…One issue with remote operation is that solids accumulate and must be continuously removed or stored on‐site (King County Wastewater Treatment Division, 2011). Vortex separators also can be designed with chemical coagulants or disinfectants to improve treatment (AECOM, 2006; Arnett et al, 2007).…”

Section: Current Cso Management and Treatmentmentioning

confidence: 99%

Current and future approaches to wet weather flow management: A review

Peters

Zitomer

2021

Water Environment Research

View full text Add to dashboard Cite

show abstract

Optimizing Disinfection of Wet Weather Flows Not Receiving Biological Treatment

Cited by 1 publication

References 0 publications

Current and future approaches to wet weather flow management: A review

Current and future approaches to wet weather flow management: A review

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