YINHua-sheng,CHENLei,LIUWen-ju,et al.Case Project of WWTP for Improving the Processing Capacity in Rainy Season to Control Overflow Pollution[J].China Water & Wastewater,2024,40(2):87-93.
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Case Project of WWTP for Improving the Processing Capacity in Rainy Season to Control Overflow Pollution

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第2期 Page: 87-93 Column: Date of publication: 2024-01-17
Author(s):
YIN　Hua-sheng1; 2;  CHEN　Lei2;  LIU　Wen-ju3;  NING　Yu3;  DING　Shuai3;  LI　Xiao-yan1
（1. Tsinghua University Shenzhen International Graduate School， Tsinghua University， Shenzhen 518005， China； 2. Hunan Academy of Building Research Co. Ltd.， Changsha 410011， China； 3. Changde Beikong Bihai Water Affairs Co. Ltd.， Changde 415000， China）
Keywords:
wastewater treatment plant;  rainy season treatment capacity;  overflow pollution;  combined disinfection
Abstract:
Fully exploiting the potential of existing wastewater treatment plant (WWTP) and improving its processing capacity in rainy season are important to solve the overflow pollution of urban drainage system. By taking measures such as increasing the water depth and the sludge concentration of biochemical tank, adding coagulants to the secondary sedimentation tank for improving sedimentation effect and adopting the disinfection of sodium hypochlorite combined with UV irradiation, the average daily processing capacity in rainy season of a WWTP can reach 1.54 times of the design scale, and the highest daily processing capacity can reach 1.87 times. The effluent quality can stably meet the standard, and the methods can effectively reduce the overflow pollution of the combined drainage system. The retrofit investment of this project to improve the productivity in rainy season is 3.226 million yuan. The operation cost of the extra treated wastewater is only 0.275 yuan/m3 when the treated wastewater exceeds the design scale.
Last Update: 2024-01-17