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FLUSHING FOR SEWER SEDIMENT, CORROSION, AND POLLUTION CONTROL
Citation:
Fan*, C Y. AND R Field*. FLUSHING FOR SEWER SEDIMENT, CORROSION, AND POLLUTION CONTROL. Presented at United Engineering Foundation Conference on Linking Stormwater BMP DEsigns and Performance to Receiving Water Impacts Mitigation, sponsored by EPA/ASCE Urban Water Resources Research Council, Snowmass, CO, August 19 - 24, 2001.
Impact/Purpose:
To inform the public.
Description:
This paper overviews causes of combined-sewer deterioration and their heavy pollutant discharges caused by rain events together with a discussion of their control methods. In particular, it covers in-sewer and combined-sewer overflow (CSO) storage-tank-flushing systems for removing sediments and minimizing hydrogen sulfide production, resulting in the reduction of associated pollution and sewerline corrosion, respectively. Performance of two technologies i.e., the tipping flusher (TF) and the flushing gate (FG) were evaluated by a detailed examination of 18 facilities in Germany, Canada and the US. Results indicate that both the TF and FG technology appear to be a cost-effective means for flushing solids and debris from CSO storage tanks, while the FG is considered to be the most efficient method for controlling combined-sewer sediment.