| abstract |
The invention belongs to technical field of sewage, more particularly to a kind of small towns sewage-treatment plant, including anaerobic pond, anoxic pond, aerobic tank, sedimentation basin, fast filter chamber, intermediate lift pump pond, filter and the bactericidal device being sequentially connected, the intermediate lift pump pond and fast filter chamber, filter are equipped with backwash channel between bactericidal device, the anaerobic pond is equipped with wastewater inlet, and the bactericidal device is equipped with water out up to standard.The beneficial effects of the present invention are: water outlet can stablize better than level-one emission standard A, and package unit is to COD, NH after apparatus of the present invention handle small towns sanitary sewage 3 The removal efficiency of-N, TN, TP and Escherichia coli are respectively 92.5%, 98%, 85%, 90%, 100%, and design waterpower total residence time is 8.0h.The removal rate of common process is respectively 90%, 96%, 72%, 83%, 99.9%, and design waterpower total residence time is 12h. |