铁碳微电解工艺预处理制药废水实验研究

制药废水中含有大量难生物降解的化学物质,其BOD5/COD值很低,可生化性差。故一般仅采用生化处理很难将其COD降低到排放标准,现采用铁碳微电解法并串联Fenton工艺对某制药厂废水进行预处理。以废水COD为指标并通过正交试验确定达到最佳处理效果的各因素的最佳组合条件为:前端的铁碳微电解反应时间为2.5 h,pH值为5,铁碳质量比1:2,Fe粉的投加量为120 g/L;后续Fenton反应投加30%H2O23 mL/L,FeSO.47H2O(100 g/L)400 mg/L,调节pH值为2,反应时间2.5 h,总去除率大于70%,为工业化应用做出铺垫。

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.