电解-Fenton法预处理炼油碱渣废水

摘要

Oil refining alkaline wastewater was pretreated by electrolysis-Fenton method,and the initial reaction pH,Fe2+ dosing quantity and the molar ratio of electrolytic reduction regeneration of Fe2+ and H2O2 effecting on the treatment effect was studied.The experimental results show that: Electrolytic-Fenton method can effectively reduce the COD of alkaline waste water,to improve the biodegradability.Under the optimum conditions of the initial pH 2.0,Fe2+ dosage 1.2 g/L,the molar ratio of electrolytic reduction regeneration of Fe2+ and H2O2 being 0.85,oxidating 1.5 hours,the COD removal rate was 58.2％and the ratio of BOD5 and COD was 0.38,which can go directly into the subsequent biological treatment system.%采用电解-Fenton法预处理炼油碱渣废水,探究初始反应pH,Fe2+投加量、电解还原再生的Fe2+与投加H2O2的摩尔比对处理效果的影响.实验结果表明:电解-Fenton法能有效降低碱渣废水的COD,改善其可生化性.在反应初始pH值为2.0,Fe2+投加量为1.2 g/L,电解还原再生的Fe2+与投加H2O2的摩尔比为0.85的最佳条件下,经过1.5 h反应,出水COD去除率达到58.2％,BOD5和COD的比值为0.38,可直接进入后续的生化处理系统.