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.
排水管网排查诊断实践与思考：以北方某缺水城市为例
- Title:
- Practice and Thinking of Investigation and Diagnosis of Urban Sewage Network:Case Study of a Water-deficient City in North China
- Keywords:
- sewage network; investigation and diagnosis; water quality and quantity monitoring; external water infiltration; misconnection of municipal rain and sewage networks
- 摘要:
- 针对北方某缺水城市排水系统存在的污水溢流、雨天污水厂进水浓度波动等现状，分析系统可能存在的河水入渗、雨污分流改造不彻底、市政雨污混错接等问题。结合水质水量监测与现场调查等手段、兼顾旱天和雨天开展分析，以水质水量的异常变化为主要依据，从下游到上游追溯、从干管到支管排查，对问题进行定位。结果表明，城区六大污水系统中，污水系统Ⅰ、Ⅳ主要受河水入渗问题影响，污水系统Ⅱ、Ⅲ受雨污分流改造不彻底、市政雨污混错接等问题影响，污水系统Ⅴ和Ⅵ受重点排水户出水水质异常、市政雨污混错接影响，具体问题点位已明确。排查诊断结果可为后续管网改造修复提供依据，促进排水系统提质增效。
- 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.
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