Pretreatment of cellulose zymolytic wastewater by iron-carbon microelectrolysis-Fenton reagent

Iron-carbon microelectrolysis-Fenton reagent was used to pretreat cellulose zymolytic wastewater with high COD,chroma and salinity.The results showed that,for the iron-carbon microelectrolysis process,the optimal condition was: the pH value was 4-5,the dosage of scrap iron was 150 g/L,the mass ratio of iron to carbon was 1 ∶ 2,the reaction time was 1 h,the aeration amount was 30 mL/min;for the Fenton reaction,the optimal condition was: the pH value was 5,the H2O2 dosage was 4.5 mL/L,the reaction time was 60 min.Under the above conditions,the total removal rate of COD and chroma reached 40% and 81% respectively,at the same time,the 4 kinds of inhibitors affecting the zymolysis of ethanol were removed effectively,the condition for the subsequent biochemical treatment and the biodegradability of the wastewater were both improved.