Experimental research on treatment cleaning wastewater in machine finishing Fenton oxidation
The influencing factors and optimal operating conditions for the treatment of cleaning wastewater in machine finishing using Fenton reagent are studied.The optimal operating conditions determined by experiment are as follows:the COD_(Cr) of the wastewater is about 2 000 mg/L,n_(H_2O_2:n_(Fe~(2+))=37.6,the dosage of H_2O_2 is 40 mL/L,pH value is 4 and the oxidation time is 2.5 h. Under these conditions,the COD_(Cr) removal rate is up to 91.4%.Meantime,the synergic effect of PAM cooperated with Fenton reagent is also studied.Under the optimal operating conditions,the COD_(Cr) removal rate is up to 93.2%.