Experiment And Engineering Application On The Pretreatment Of Aniline Wastewater By Iron-carbon Micro-electrolysis And Fenton Combined Process

The experimental study on the pretreatment of wastewater containing aniline,iron carbon micro electrolysis, Fenton oxidation and their joint process containinganiline wastewater treatment of single factor experiment, studying the effect of mainfactors on treatment effect, and through the orthogonal test to determine the optimumreaction parameters, finally further verify the combination with the engineeringpractice project the feasibility of the combination process containing anilinewastewater treatment.The primary and secondary order of the main factors of the anline wastewatertreatment by Iron carbon micro electrolysis are iron dosage> Fe-C mass ratio>reaction time> pH; The optimal operation parameters are: scrap iron dosage of40g/L, Fe-Cmass ration of1/1, reaction time is120min, the removal rates of CODand aniline is45.05%and75.36%, respectively. The biodegradability is increasedfrom0.15to0.27.The primary and secondary order of the main factors of wastewater containinganline,which are treated by Fenton oxidation,are H2O2dosage> FeSO4dosage> pH>reaction time.The result showed that the best operating parameter are:30%H2O2dosage of4.2ml/L,FeSO4dosage of300mg/L, the water’s pH is regulated at3, reaction time is90min, the removal rates of COD and aniline of wastewater are70.58%and78.34%, respectively. The biodegradability is increased from0.15to0.32.The optimum operation parameters of Iron carbon micro electrolysis-Fentonoxidation process in a combined treatment of wastewater containing aniline are asfollows: the water’s pH is regulated at3,40g/L of iron dosage, Fe-Cmass ration of1/1, reaction time is120min, H2O2dosage of4.2ml/L, stirring, raetion time ofFenton oxidation is90min, alkalining, coagulation precipitation for60min. Theremoval rate of COD and aniline compounds in the best condition can reach84.5%and94.6%. The water can be reasonable in the follow-up biochemical treatment,because the biodegradability should be increased from0.15to0.45.The system of the engineering practice, pre-treating the wastewater containinganiline with Iron carbon micro electrolysis-Fenton oxidation combined technology,are stable. And the treatment effect is satisfying with a removal efficiency of84.3% and94.3%.The results prove that the joint process of iron carbon micro electrolysis-Fenton reagent oxidation is feasible in dealing with the wastewater containing aniline.