WUQiong,HANLi,SUNYaquan,et al.Emergency Improvement Case of Sewage Centralized Collection and Treatment Rate under the Background of Improving Quality and Efficiency[J].China Water & Wastewater,2026,42(10):110-116.
Emergency Improvement Case of Sewage Centralized Collection and Treatment Rate under the Background of Improving Quality and Efficiency
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第10期
Page:
110-116
Column:
Date of publication:
2026-05-17
- Keywords:
- centralized collection and treatment rate of wastewater; external water; non?engineering measures; engineering measures
- Abstract:
- The inflow of external water is the main reason for the low influent COD of the the sewage treatment plant and low centralized treatment rate of domestic sewage. In order to accelerate the improvement of the shortcomings in sewage collection and treatment, a city has adopted water quality testing, manual and instrument inspection methods. Through non?engineering measures such as low water level operation of the pipe network, cancellation of septic tanks and control of river water levels, as well as engineering measures such as pipe and manhole repair, outlet rectification and mixed and misconnected pipeline renovation, the influent COD of the sewage treatment plant has been urgently increased. After the completion of the project, the average influent COD of the 6 sewage treatment plants in the main urban area increased by approximately 30%, and the average centralized collection and treatment rate of domestic sewage increased by approximately 10%. Practical experience has shown that the rectification of discharge outlets and the control of river water levels can solve the problem of backflow of river water, and this is the basis for evaluating the effectiveness of other measures. The repair of pipelines and inspection wells along and across the river has a significant emergency effect on the influent COD of the sewage treatment plant, followed by the rectification of mixed and misconnected pipes. After the implementation of engineering measures, the operation of the pipeline at a low water level can further increase the concentration. The effect of eliminating septic tanks is obvious, but it should be carried out after the complete separation of rainwater and sewage in the municipal pipeline.
Last Update:
2026-05-17