Research on the Pretreatment of the Pharmaceutical Wastewater by Fenton Reagent and Fe-C Microelectrolysis Process

Pharmaceutical wastewater contains large amounts of non-biodegradable chemicals,the BOD5 /COD ratio is ve-ry low,so its biodegradability is very poor.Generally only using biological treatment is difficult to reduce its COD below the emission standards.Now adopting the Fe-C microelectronics and connect Fenton reagent to pretreat pharmaceutical wastewater.The best combination conditions when as COD to the indicator of series experiment of Fe-C-Fenton were:the previous Fe-C microelectrilysis: reaction time was 2.5 h,pH was 5,the mass ratio of Fe/C was 1∶2,the dosage of Fe was 120 g/L;follow Fenton reagent: added 30% H2O2 3 mL/L and FeSO4·7H2O(100 g/L)1 800 mg/L,and adjusted the reaction time to 2.5 h,pH to 2,the total removal ratio was above 70%,and to pay the way for industrial applications.