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Sanitary sewer overflow (SSO) is a condition in which untreated sewage is discharged from a sanitary sewer into the environment prior to reaching sewage treatment facilities. When caused by rainfall it is also known as wet weather overflow .
Facultative lagoon (polishing pond) providing tertiary treatment after a constructed wetland in Hamburg-Allermöhe, Germany. Overflow from the facultative lagoon may be routed through one or more polishing ponds supporting lower populations of anaerobic micro-organisms and a higher proportion of aerobic organisms adapted to survival in lower concentrations of organic material.
In the event of heavy rain, the pond is designed to overflow past the weir and into a stormwater collection area. Piney Point’s past After opening in 1966, Piney Point operated for nearly 40 years.
Sewer solids deposition during low flow periods and subsequent resuspension during peak flow events is the major pollutant source for the first-flush combined-sewer overflow (CSO) phenomenon. [6] Sanitary sewage solids can either go through the system or settle out in laminar flow portions of the sewer to be available for washout during peak flows.
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A 2014 federal court consent decree between the city and EPA mandates the city clean up its sewer overflow by Dec. 31, 2026. More: Akron fights U.S. EPA over 'wasteful' sewer project that could ...
Excessive infiltration/inflow may cause sanitary sewer overflows during wet weather. High rates of infiltration/inflow may make the sanitary sewer incapable of carrying sewage from the design service area. Sewage may back up into the lowest homes during wet weather, or street manholes may overflow. [9]
An estimated 45,000 gallons of wastewater were released from a gravity main Saturday in Bluffton, according to a Beaufort-Jasper Water and Sewer Authority news release Monday evening, but the ...
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