YAOYue,GUSi-wen,SHENXu,et al.Practice and Thinking of Investigation and Diagnosis of Urban Sewage Network:Case Study of a Water-deficient City in North China[J].China Water & Wastewater,2022,38(12):113-118.
Practice and Thinking of Investigation and Diagnosis of Urban Sewage Network:Case Study of a Water-deficient City in North China
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第12期
Page:
113-118
Column:
Date of publication:
2022-06-17
- Keywords:
- sewage network; investigation and diagnosis; water quality and quantity monitoring; external water infiltration; misconnection of municipal rain and sewage networks
- Abstract:
- The sewage system of a water-deficient city in the north China has problems such as sewage overflow and fluctuation of the influent concentration of the sewage treatment plant in rainy days. Possible problems such as river water infiltration, incomplete transformation of rain and sewage diversion, and misconnection of municipal rain and sewage networks were analyzed. The analysis was carried out by combining water quality and quantity monitoring and on-site investigations, taking into account dry and rainy days. The defects were positioned by investigating from downstream to upstream, and from main pipes to branch pipes, and diagnosed according to abnormal changes in water quality and quantity. The results showed that: among the six urban sewage systems, sewage systems Ⅰ and Ⅳ were mainly affected by river water infiltration problems, sewage systems Ⅱ and Ⅲ were affected by the incomplete transformation of rain and sewage diversion, and misconnection of municipal rain and sewage networks. In addition, the abnormal effluent quality of key sewage households and misconnection of municipal rain and sewage networks were the influence factors of sewage systems Ⅴ and Ⅵ. The specific problem points have been clarified. The results can provide a reference for the reconstruction and repair of the sewage network, and promote the quality and efficiency of the sewage system.
Last Update:
2022-06-17