Summary description： The design daily treatment capacity of the sewage treatment project of Yanqing detention house is 150 tons. The pwt-a-150 type equipment independently developed and produced by Huayu brilliant is adopted. The process of anoxic + aerobic + MBR is adopted to meet the perennial sewage treatment demand in the detention center, so as to avoid direct discharge of sewage into nearby rivers along the way, causing environmental pollution. Because Yanqing District belongs to mountainous area, the temperature is low all year round. In order to ensure the normal operation of the equipment, the fully buried equipment is adopted, and the effluent meets the IV water standard of surface water environment stably, which is better than the national integrated discharge standard of pollutants for municipal wastewater treatment plant.