Study on treatment of coking wastewater by three-dimensional fluid bed electrode reactor combined with Fenton process

摘要

Experiments were conducted to investigate the behavior of the integrated process with a three-dimensional electrode reactor combined with Fenton process for coking wastewater treatment.Effects of initial pH value,reaction time,H2O2 dosage,Fe2+ dosage on Total organic carbon (TOC) removal rate were investigated.The kinetics of degradation of TOC from coking wastewater by three-dimensional fluid bed electrode reactor combined with Fenton process was also studied.Experimental results shows that three-dimensional fluid bed electrode reactor combined with Fenton process had better synergic effect,average 17.4％ TOC removal rate was improved within an hour.It was found that TOC degradation in coking wastewater followed a pseudo-first-order reaction kinetic model.The optimum degradation efficiencies of TOC were up to 60％ as pH3.4,3.5 mM of Fe2+ and1.2～1.8ml/L H2O2 in 90min reaction period.Furthermore,the integrated process showed a rapid reaction performance at a low temperature within a short reaction time and remained high efficiencies for TOC removal.Overall,the integrated process was proved feasible for coking wastewater treatment in practical applications.