Summary description： Located in Simian Mountain Scenic Area, Jiangjin District, Chongqing, Majia villa has a large annual passenger flow. The main source of sewage in the scenic area is public toilets and restaurants. The designed daily treatment capacity is 50 tons. It adopts pwt-a-50 equipment independently developed and produced by Huayu brilliant, and adopts anoxic + aerobic + MBR equipment The effluent meets the national integrated discharge standard of pollutants for municipal wastewater treatment plant, which solves the problem of scattered discharge of sewage. The effluent is collected and used for landscaping.