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GATE AND VACUUM FLUSHING OF SEWER SEDIMENT: LABORATORY TESTING
Citation:
Guo, Q., C Fan*, R Field*, AND R. Raghavan. GATE AND VACUUM FLUSHING OF SEWER SEDIMENT: LABORATORY TESTING. JOURNAL OF HYDRAULIC ENGINEERING. American Society of Civil Engineers (ASCE), Reston, VA, 130(5):463-466, (2004).
Impact/Purpose:
information
Description:
The objective of this study was to test the performance of a traditional gate-flushing device and a newly-designed vacuum-flushing device in removing sediment from combined sewers and CSO storage tanks. A laboratory hydraulic flume was used to simulate a reach of sewer or storage tank. The flushing device was fabricated and installed at the head-end of the flume. The removed sediment was collected at the end of the flume and weighed. The test results indicate that the weight of flushed sediment increases with the initial water depth in the flushing device; the weight of flushed sediment decreases with the initial water depth in the flume; the weight of flushed sediment only changes slightly with the height of flushing device opening for water release and does not necessarily increase with the height. Water is held up by vacuum and is
released upon dissipation of the vacuum in the vacuum-flushing device rather than through closing and opening of a mechanical gate in the gate-flushing device. The test results indicate that sediment removal efficiency of the vacuum-flushing device is practically the same as the gate-flushing device.
