A study on a pilot plant accomplishing synchronous municipal sewerage sludge stabilization was conducted at a municipal sewerage treatment plant. Stabilization of sewerage and sludge is achieved in three step process: anaerobic reactor, roughing filter and a microbial earthworm ecofilter. The integrated ecofilter utilizes an artificial ecosystem to degrade and stabilize the sewerage and sludge. When the hydraulic retention time(HRT) of the anaerobic reactor is 6 h, the hydraulic load(HL) of the bio filter is 16 m 3/(m 2·d), the HL of the eco filter is 5 m 3/(m 2·d), the recycle ratio of nitrified liquor is 1 5, the removal efficiency is 83%—89% for COD Cr , 94%—96% for BOD 5, 96%—98% for SS, and 76%—95% for NH 3|N. The whole system realizes the zero emission of sludge, and has the characteristics of saving energy consumption and operational costs.
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