The wastewater treatment plant data comes from a typical case, with a recent design capacity of 50,000 m3/d. The wastewater treatment plant covers an area of 103. 4 mu (Chinese unit of area), the project was constructed in 2016. The construction project does not include the external sewage intercepting pipe and subsequent sewage plant project. The wastewater treated by the sewage plant mainly consists of domestic sewage with a small proportion of industrial sewage. The proportion of industrial wastewater does not exceed 40% of the sewage plant construction scale. The industrial wastewater is pre-treated by each enterprise to meet relevant standard requirements before being uniformly discharged into the development zone's sewage network through the total discharge outlet of enterprise wastewater. The sewage treatment mainly adopts the three-level treatment process of A/A/O process. The discharged water should meet the first-class A standard in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB18918-2002).