Summary description： Tianjiayuan village is a village with a large population in Doudian town. There are farms, communities, scattered villagers and businesses in the village. The population is relatively dense. The sewage generated is directly discharged into Dashi River after being collected by ditches. Dashi river is the cross-border assessment section of Beijing and Hebei. In order to thoroughly solve the problem of direct sewage discharge, the designed daily treatment capacity of tianjiayuan village sewage treatment station is 2000 tons, using 4 The pwt-a-500 equipment independently developed and produced by Huayu brilliant adopts anoxic + aerobic + MBR process to solve the sewage discharge problem of 10000 people in the village, and avoid the sewage directly discharged into the Dashi River along the way, causing environmental pollution. The effluent of the equipment can meet the IV water standard of surface water environment, which is better than the national integrated discharge standard of pollutants for municipal wastewater treatment plant.