Summary description： Longfengling scenic area is located in Mentougou District, Beijing, with large flow in summer and autumn. The main source of sewage in the scenic area is public toilets and restaurants. The designed daily treatment capacity is 20 tons. The pwt-a-20 equipment independently developed and produced by Huayu brilliant is adopted. The process of anoxic + aerobic + MBR is adopted. The effluent from the equipment can reach the surface water environment IV stably The water standard is better than the national "comprehensive discharge standard of pollutants for municipal wastewater treatment plant". The effluent collection and reuse pool is used for scenic area greening.