Optimization of Process Parameters on Printing and Dyeing Wastewater Treatment With Fenton Reagent

Dyeing wastewater simulated with methylene blue(COD=2 000 mg/L) was treated by the means of Fenton reagent oxidation,the COD removal rate for the evaluation of indicators,by the methods of single factor and orthogonal experiments,the Fenton reagent dosage,reaction time and initial pH was researched.The results show that the COD removal rates of water sample increas with the increasing of Fenton reagent dosages and the reaction time,and the fitting Fenton reagent dosage and reaction time are 5 mL reagent and 25 mL aqueous sample and 30 min respectively.With the adjustment of initial water pH,the COD removal rates changed like peaks and slopes,and the fitting value was 4.In the course of Fenton reagent oxidizing wastewater,the COD removal rates of aqueous sample are not affected obviously by the every level of the three factors;And at the optimized conditions,the COD removal rate of water sample is removed to 88.77%;The effect sequence of the three factors are reaction timeFenton reagent dosageinitial water pH.In the course of Fenton reagent oxidating wastewater,to the COD removal rate of aqueous samples,the influence of three factors in the each level is not obvious.