Design a project of sewage plant to make the cross-section water quality reach standard

¹ School of municipal and environmental engineering, Shenyang Jianzhu University, Shenyang, Liaoning Province, 110168, China
² School of municipal and environmental engineering, Shenyang Jianzhu University, Shenyang, Liaoning Province, 110168, China
³ Tangshan Planning and Architectural Design & Research Institute, Tangshan, Hebei Province, 063000, China
⁴ School of municipal and environmental engineering, Shenyang Jianzhu University, Shenyang, Liaoning Province, 110168, China

¹ e-mail: leichao@sjzu.edu.cn
^2* Corresponding author’s e-mail: lansexueqiao@stu.sjzu.edu.cn

Abstract

According to regulations, the cross-section of Wangjiawopeng is regarded as a national control section of the Daling River. The water quality of the section must meet the surface water level III standard. According to the survey, the total phosphorus in the effluent from the sewage plant in Jianchang exceeds the standard is the main reason for the failure of the water quality. In order to make the cross-section water quality reaching standard, it is necessary to carry out the advanced treatment of phosphorus in the sewage plant. (1) The precipitation reaction of phosphorus and coagulant in sewage is strengthened by optimizing the type of coagulant, optimizing the dosage of coagulant, and selecting suitable coagulant aids. (2) The removal efficiency of phosphorus is improved by high-speed fiber filtration technology. (3) Phosphorus is removed by flocculation-sedimentation-high-speed fiber filtration technology. Experiments show that the SS in the sewage plant effluent is less than 5mg/L and filter effluent TP is less than 0.2mg/L. The process construction investment is estimated to be 3.9 million yuan, and the operating electricity cost is estimated to be 0.2 cents/m³. The process has the characteristics of reliable processing technology, stable operation, easy maintenance.