DONGJin-bo,TANGYan,MAShun?bo,et al.Analysis of Extraneous Water in an Urban Sewage Treatment System in Zhenjiang[J].China Water & Wastewater,2022,38(8):92-98.
Analysis of Extraneous Water in an Urban Sewage Treatment System in Zhenjiang
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第8期
Page:
92-98
Column:
Date of publication:
2022-04-17
- Keywords:
- improvement of quality and efficiency; extraneous water reduction; pre?evaluationof treatment effect
- Abstract:
- The extraneous water in the urban sewage treatment system is considered as the main cause for the low concentration of BOD5in the influent of urban sewage treatment plants. An urban sewage treatment plant in Zhenjiang has made efforts to improve quality and efficiency. In order to quantitatively analyze the quantity of various extraneous water, in sunny and rainy days, we track and monitor the changes of water quality and quantity in the sewage treatment plant and its pump stations. The changes were linked to the rainfall and the concentration of BOD5 from drainage entities. The average concentration of BOD5 for water systems within the service areas is applied as the average concentration of extraneous water, and the influences of stable extraneous water such as rivers and lake water and other transient extraneous water such as rainfall were evaluated on each pump station. The results show the proportion of extraneous water of different pump stations is different, and the degree of extraneous water intrusion is different. According to the evaluation results from the pump stations, we guided the investigation of the sewage collection system, and located the defective parts. Furthermore, corresponding engineering rectification measures and overall long-term management measures were proposed. Through the analysis of this engineering case, the feasibility of the measures is determined. Moreover, according to the plan on extraneous water reduction, the rectification effect is pre-evaluated. Our work has proved the effectiveness of the rectification measures. This work can provide a reference for the quantitative analysis of water quality in other urban sewage treatment plants, and the protocols on the extraneous water reduction with low BOD5 concentration.
Last Update:
2022-04-17