城市雨污分流效果评价指标体系构建及应用

Construction and Application of Evaluation Index System for Urban Rainwater and Sewage Separation Effect

摘要:

自城市排水系统进入以存量为主、高质量发展的提质增效新阶段以来，各地相继开展了管道缺陷排查、雨污错混接整治等雨污分流工作。但对于雨污分流效果如何，仍缺乏较为科学的评价体系。为保障排水管网问题整改工作的推进，提升城市排水管网雨污分流效果，从本底情况、运行效果、环境效益、长效管理4个层面选取18项具体指标，系统构建了城市排水管网雨污分流效果评价体系，并选取某城市污水厂服务范围作为研究区域，应用该评价指标体系对其雨污分流效果进行评价，同时采用实际进水数据进行验证。指标体系评价结论是该污水厂总得分为65.91，片区雨污分流效果为“一般”；而根据实际进水数据分析得到的结论同样是该污水厂雨污分流效果不佳。评价结论与进水数据分析结论基本一致，说明雨污分流效果评价体系具有现实可行性。

Abstract:

Since the urban drainage system has entered a new stage of quality improvement and efficiency enhancement with a focus on existing resources and high-quality development, the rainwater and sewage separation work such as pipeline defect investigation, and rainwater and sewage misconnection remediation has been successively carried out in various regions. However, there is still a lack of a more scientific evaluation system for the separation effect of rainwater and sewage. To ensure the progress of the rectification work of drainage network problems and improve the rainwater and sewage separation effect of urban drainage network, 18 specific indicators are selected from four levels such as background situation, operational effect, environmental benefit and long-term management systematically to build the evaluation system for the rainwater and sewage separation effect of urban drainage network. After the service scope of a wastewater treatment plant in a city is selected as the research area, the evaluation index system is applied to evaluate the separation effect of its rainwater and sewage, and the actual influent data is used for verification. The conclusion of the index system evaluation is that the total score of the WWTP is 65.91, and the effect of rainwater and sewage separation in the area is "average". The conclusion based on the analysis on the actual influent data shows that the rainwater and sewage separation effect of the WWTP is also poor. The evaluation conclusion is basically consistent with the conclusion of the influent data analysis, which indicates that the rainwater and sewage separation effect evaluation system is feasible in practice.