The data of the wastewater treatment plant comes from a typical case. The total area of this plant is 28,305 square meters, mainly treating domestic and public facility wastewater from the town center area. The service life of this plant is 50 years. The designed treatment capacity is 2,000 m3/d, and the wastewater treatment adopts the process of \"coarse screen + regulating tank + fine screen + grit chamber + CASS tank + filtration + disinfection\", thereby achieving the first-level A discharge standard of the \"Urban Wastewater Treatment Plant Pollutants Discharge Standard\" (GB18918-2002).