LIU Zhan-guang,TAN Xue-jun,CHEN Yan.Evaluation and Diagnosis of Urban Sewage Pipe Network Based on Water Flow Analysis and Node Monitoring[J].China Water & Wastewater,2021,37(17 17):32-37.
Evaluation and Diagnosis of Urban Sewage Pipe Network Based on Water Flow Analysis and Node Monitoring
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
17 17
Page:
32-37
Column:
Date of publication:
2021-09-01
- Keywords:
- sewage drainage system; quality and efficiency improvement; water flow analysis; node monitoring; tracing analysis
- Abstract:
- The preliminary diagnosis of a drainage system of a sewage pump station was carried out based on on-site inspection, water flow analysis, node monitoring and other methods. Through tracing analysis, the scope of the problem pipe section was narrowed, and then the targeted solution was proposed. The rainwater flow rate of the pumping station reached 2.4 times that of the dry weather, indicating that there was a serious misconnection of rainwater and sewage pipes in the upstream drainage system of the pumping station. The water quality of the pumping station was significantly lower than that of the domestic sewage in the dry weather. The COD of the instantaneous samples were between 110 mg/L and 140 mg/L most of the time, and the COD and BOD5 of the mixed samples were 165 mg/L and 81.6 mg/L, respectively, indicating that there was an inflow of external water in the upstream pipe network of the pumping station in dry weather. The water quality of the pipe network nodes decreased in different degrees in rainy days, and the total nitrogen of the two branch pipes decreased by 78% and 60%, respectively. The contribution rate of different branch pipes to the pollutant concentration reduction in the sewage pump station was further evaluated through tracing analysis, and the scope of misconnection of rainwater and sewage pipes was narrowed. The method can provide reference for improving the quality and efficiency of sewage pipe network systems in China.
Last Update:
2021-09-01