铁碳微电解-Fenton氧化-生化法联合处理含铬电镀废水

采用铁炭微电解-Fenton氧化-生化法联合工艺处理含铬电镀废水,在一系列静态试验的基础上,运用正交试验确定各影响因素的重要程度,确定最佳的运行参数;从理论上论证铁炭微电解法和Fenton试剂氧化法联合的可能性,确定各影响因素的最佳值。最后通过生化法处理废水时,考察废水停留时间对废水处理效果的影响。废水经铁炭微电解-Fenton氧化-生化法连续处理后,出水中Cr6+,Cu2+和COD的质量浓度分别为0.05,0.08和50 mg/L,其去除率分别为99%,99.7%和86%,出水水质达到《电镀污染物排放标准》(GB 21900-2008)表三标准的要求,且不存在二次污染问题。

Treatment of Electroplating Wastewater by Combined Process Using Fe-C Micro-Electrolysis-Fenton Oxidation and Biological Process

Electroplating wastewater containing Cr^6＋ was treated by Fe-C Micro-electrolysis - Fenton Oxidation and Biological Process. Based on a series of static experiments, the degree of importance of influence factors is determined by orthogonal experiment and the optimal operating parameters are determined by single factor experiment. And then the possibility of connecting micro-electrolysis with Fenton oxidation is demonstrated in theory. At last in the treatment by biological process, effects of HRT was studied. By the Combined Process, the mass concentrations of Cr^6＋, Cu^2＋and COD in the final effluent are 0.05, 0 08 and 50 mg/L with removal rates of 99.0 %, 99.7 % and 86.0 % respectively. The effluent quality can meet the Emission standard of pollutants for electroplating （GB 21900-2008 Tab.3）. Meanwhile, there is no secondary pollution.