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.