电絮凝法和Fenton试剂法处理染料车间废水的性能

Treatment Property of Dye Manufacturing Shop Effluent by Electrocoagulation and Fenton Reagent

分别采用Fenton试剂氧化法和电絮凝法对染料生产车间废水进行预处理实验.采用铁阳极电絮凝,在最佳电流密度为12.5 mA/cm2时COD去除率为20.54%;以铝为阳极时在最佳电流密度为8.33 mA/cm2时COD去除率为37.57%.考察了采用Fenton试剂氧化法处理时不同实验因素对COD去除率的影响,确定了硫酸亚铁投加量600 mg/L,过氧化氢投加量6 mL/L,pH值2.21,反应时间为90 min的最佳操作条件,此时COD去除率为74.62%,处理药剂成本为39.1元/t COD.结果表明:电絮凝方法中采用铝为阳极时处理效果优于铁电极;与电絮凝法相比,Fenton试剂氧化法是一种高效低耗的预处理方法.

Electrocoagulation and the Fenton reagent processes were explored to treat the dye manufacturing shop wastewater.In the case of electrocoagulation,for iron anode,20.54% of COD removal efficiency was achieved at the optimum current density of 12.5 mA/cm^2,while for aluminum anode,37.57% of COD was removed at the optimum current density of 8.33 mA/cm^2.The removal efficiency of COD with Fenton reagent was investigated at various effect factors.74.62% of COD was removed and the reagent costs were 39.1 yuan per ton COD.The optimum operation parameters were as follows： 600 mg/L FeSO4·7H2O,6 mL/L H2O2（30%）,pH 2.21,90min reaction time.The results indicate that elctrocoagulation with aluminum anode is more effective than that of with iron,while Fenton reagent is better than elctrocoagulation for its high efficiency and low cost.