高浓度Cu-COD废水处理方法研究

采用化学凝聚-生物流化床法对含Cu1700—3800mg/L和COD3900—5400mg/L的Cu-COD)废水进行处理试验研究。着重研究了生物流化床挂膜驯化条件和废水停留时间、容积负荷,气水比及化学凝聚条件等与去除COD和Cu的关系。试验结果表明,采用凝聚-生物流化床组合工艺并在控制适宜条件下,处理高浓度Cu-COD废水是有效的,处理后排放水中铜浓度可达0.20—0.82mg/L,COD可达150—180mg/L,铜总去除率可达99.97％,COD总去除率可达95％—96％。

Treatment of High Concentration Copper-COD Wastewater

A combined chemical coagulation-biological fluidized bed process has been used to investigate the treatment of wastewater in whieh the concentrations of copper and COD are 1700 -3800mg/L and 3900-5400 mg/L,respectively. The relations between the copper and COD removal rates and the technical conditions of the process .such as retention time,load in influent water,the ratio of gas to water etc. for the fluidized bed; pH and coagulant dosages etc. for coagulation process, have been determined. The results show that the above conbined process is the effective one for high concentration copper-COD wastewater. Under the optimum conditions , the copper and COD concentrations in the effluent can be less than 0. 82 mg/L and 180 mg/L respectively,and the total removal rates can be obtained of up to 99. 97 % for copper and 95 % for COD.