污水处理厂尾水排放对排污口下游水环境影响分析

Analysis of the influence of tail water discharge from sewage treatment plant on the water environment downstream of the sewage outlet

以无锡地区某污水处理厂扩建工程为例,根据尾水排放条件和受纳水体的水文条件,采用一维水量水质数学模型来进行水环境影响预测分析。结果表明,随着扩建工程实施,排污口所在河流下游的各考核断面在扩建后均达到河流地表水保护目标,且污染物COD、TP与现状相比,各断面水质均有明显改善,削减了区域污染负荷,对改善京杭运河水环境质量起到了十分重要的作用。

Taking a sewage treatment plant in Wuxi basin as an example,According to tailrace discharge conditions and hydrologic condition in plain river, Useing One-dimension water quality and quantity model to prediction and analysis on water environment.Results show: With the extension project completed,some parts of wewage treatment plants be colsed,the water quality of every assessment section in the sewage outlet downstream of the river can meet the quality standard, COD、TP of every assessment section in the sewage outlet downstream of the river were better than before. Regional pollution have been reduced,which is of great siganificance to improve the water environment of Jinghang river.