流域治理视角下合流制雨季超量混合污水治理策略
中国给水排水[ISSN:1000-4062/CN:12-1073/TU]
卷:
第36卷
期数:
2020年第8期
页码:
20-29
栏目:
出版日期:
2020-04-17
- Title:
- Watershed Management and Control Strategies for Urban Combined Sewer Overflows during Peak Wet Weather Flow Conditions
- 摘要:
-
传统集中式城镇卫生系统在改善水环境的同时，也凸显了集中管网系统在雨季对汇水区域雨水快速收集、快速下泄导致的污水厂进水短期水量大幅提高的水力负荷冲击问题，而我国目前活性污泥系统工艺设计及运行模式无法应对雨季峰值流量，导致管网沿程溢流或厂前溢流或者超越，严重污染了城市河道、受纳水体。在分析集中式城镇排水系统应对峰值流量系统性欠缺的基础上，结合雨季峰值流量特性，总结了欧美发达国家在雨季超量混合流量处理方面主要的技术路线、解决方案和运行控制模式，并就我国流域治理大背景下实施雨季峰值流量处理在立法及排放标准方面提出了建议。
- Abstract:
-
While the traditional urban sanitary sewers system collects wastewater and improves the water environment, it also reveals the hydraulic capacity shortage of the WWTPs and their insufficiency in handling peak wet weather flow problems caused by rapid increase of inflow due to high intensity stormwater collected from the catchment area and the rapid transfer of stormwater to the WWTPs in the centralized urban drainage system. However, the current wastewater treatment design and operation in our country, for example activated sludge design, does not address peak wet weather flow condition. This causes sanitary sewer collection system overflow and bypass before wastewater reaches wastewater treatment plants and internal bypass of wastewater design processes within the WWTP. The overflow and bypass have significantly polluted our rivers, receiving streams, and surface waters. Evaluating the systematic capacity shortage of the centralized urban collection systems in dealing with peak wet weather flow and analyzing the characteristics of the peak wet weather flow pattern in our country, this paper studied the main technical framework, solutions and operational control model of dealing with peak wet weather flows in the developed countries in Europe and North America. This paper has thus provided recommendations to policy making and legislation as well as development of effluent discharge standards for peak wet weather flow treatment, serving as a next phase in watershed management in China.
更新日期/Last Update:
2020-04-17