微电解/Fenton法预处理炼油碱渣的实验

采用铁碳微电解/Fenton试剂组合工艺对炼油碱渣废水混凝沉淀处理后出水,进行降解研究。实验结果表明:pH值为3,废水与铁碳填料的体积比为2∶1,微电解反应时间2 h,曝气的条件下,废水的处理效果最好,COD的去除率超过42.5%。Fenton试剂处理微电解反应出水的最佳操作条件是:pH值在2～3之间、反应时间2.5 h、Fe2+浓度为800 mg/L左右、H2O2浓度为0.25 mol/L,在此条件下,Fenton试剂处理微电解处理后的炼油碱渣废水COD平均去除率为63.8%以上,微电解/Fenton工艺对COD的总去除率在79.2%左右,可生化性由0.16提高到0.56。

Treatment of Refining Alkaline Residue Wastewater by Micro-electrolysis/Fenton Process

In this study,the Fe-C micro-electrolysis/Fenton process was used in the treatment of refining alkaline residue production wastewater.The optimal conditions of Fe-C micro-electrolysis process as follows: the volume ratio of wastewater to Fe-C filler was 2∶1,initial pH value was 3,reaction time was 2 h,under these conditions,the concentration of COD was between 16 000 mg/L and 17 000 mg/L,the removal rate reached to about 42.5%.The optimal conditions of Fenton reagent oxidation process as follows: pH value was between 2 and 3,reaction time was 2.5 h,Fe2+ concentration was about 800 mg/L,H2O2 concentration was 0.25 mol/L,the removal rate of COD reached to 42.5%.Micro-electrolysis/Fenton process on the total removal rate of COD was about 79.2%.biodegradability increased from 0.16 to 0.56.