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对上海市某合流制排水系统服务范围内的地表径流、旱流污水和管道沉积物的污染物特性进行检测分析,通过对比不同污染源的污染特征,确定Zn、NH+4-N、P的含量分别在地表径流、旱流污水和管道沉积物中具有特异性且相对稳定,提出以Zn/P、NH+4-N/Zn、P/K这3个无量纲比值作为上述3个排放源各自的特征参数,据此探讨了CMB法在合流制雨天溢流污染源解析中的应用,结果表明,地表径流、旱流污水和管道沉积物对溢流污染的平均贡献率分别为42.8%、12.2%、23.8%,解析结果可基本反映CSO污染的构成情况.研究方法与结果为合流制系统雨天溢流污染源解析提供了参考.
The pollutants characteristics of surface runoff, dry runoff and pipeline sediment in a confluent drainage system in Shanghai were detected and analyzed. By comparing the pollution characteristics of different pollution sources, the contents of Zn, NH + 4-N and P were determined They are specific and relatively stable in surface runoff, dry runoff and pipeline sediments respectively. Three dimensionless ratios of Zn / P, NH + 4-N / Zn and P / K are proposed as the above three emission sources The results show that the average contribution rates of surface runoff, dry runoff and pipeline sediment to overflow pollution are respectively 42.8% and 12.2% , 23.8%, respectively, and the analytical results can basically reflect the composition of CSO pollution.The research methods and results provide references for the analysis of pollution sources of rainy overflow in a co-flow system.