太湖流域江苏片区工业源污染负荷研究

Research on the Load of Industrial Pollution in the Taihu Lake Basin in Jiangsu Province

利用第一次全国污染物普查数据对太湖流域江苏片区工业源的原始产生量、出厂排放量按行业类别及排放去向进行了统计分析,由于仅COD、氨氮2项指标被纳入普查工业源重点因子,为全面分析工业源污染负荷量,选取常州、苏州、无锡、镇江地区共计1424家典型企业对TN、TP因子进行了补充监测,同时,对各县市共214家污水处理厂排口浓度进行了详细调查,在此基础上,对工业源直排入河量及污水处理厂处理后入河量进行了测算。结果表明:太湖流域江苏片区工业源原始产生废水19.59亿t、COD 118.7万t、氨氮3.47万t,经过企业内部处理后出厂排放废水量约11亿t,其中35%的废水接入了污水处理厂;太湖流域江苏片区最终入河的工业源污染物量分别为COD 10.6万t/a、氨氮4 665t/a、总磷934t/a、总氮1.84万t/a。

Total produced industrial pollutants and discharges from the factories in the Taihu Lake Basin in Jiangsu Province are ana- lyzed according to the categories of industries and discharge directions based on the national survey data in which only COD and am- monia-nitrogen are included as the key factors for industrial source. To comprehensively analyze the pollution load in this area, TN and TP factors were monitored in 1 424 typical factories in Changzhou, Zhenjiang , Suzhou and Wuxi. And the concentrations of the effluent from sewage treatment plants were explored to calculate the untreated and treated discharge. Results show that the total in- dustrial sewage produced in this area is 1. 959 billion tons annually, 1. 187 million tons and 34 700 tons annually for COD and ammo- nia-nitrogen separately, the discharge of swage treated by the factories is about 1.1 billion tons in which only 35~ are transported to the treatment plants. Finally, the discharges of COD, NHa-N, TN and TP to rivers are respectivelyl06000 tons, 5 252 tons, 18 900 ton and 934 tons per year.