A New Approach to CSO Control: A Unique Device for Preventing Sludge Accumulation in Inverted Siphons

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In combined sewer systems, when there is an increase in flow volume due to wet weather, the accumulated sludge in the inverted siphons is easily flushed out and discharged by the CSO into the rivers together with untreated sewerage, which leads to deterioration of public water bodies. Thus, we have worked out a device for preventing sludge accumulation in inverted siphons at any time. Characteristically, this device can drain the accumulated sludge with waste water by the power of a hydraulic head instead of a pump or the like. The best results from our monitoring studies show that setting this device in an inverted siphon reduces the BOD and SS concentration in the suspension layer to 1/40, and the accumulation of sludge to 1/4.

Keywords: Combined sewer overflow (CSO); inverted siphon; sludge density

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864711802764995

Publication date: January 1, 2011

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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