Fenton氧化法深度处理抗生素废水二级出水

采用Fenton氧化法对青霉素和土霉素混合废水二级处理出水进行深度处理,通过正交和单因素实验研究了废水初始反应pH值、H2O2投加量、Fe2+/H2O2摩尔比及反应时间等因素对废水处理效果的影响。实验结果表明,Fenton氧化法处理的最佳反应条件为:初始pH值4、H2O2(30%)投加量50 mL/L、Fe2+/H2O2摩尔比1/20和反应时间60 min,处理后出水COD小于120 mg/L,COD去除率在75%以上,急性毒性(HgCl2毒性当量)小于0.07 mg/L,满足《发酵类制药工业水污染物排放标准》(GB21903-2008)表2标准要求。

Advanced treatment of secondary effluent of antibiotic wastewater using Fenton oxidation method

Fenton process was used to oxidize secondary effluent of wastewater with penicillin and oxytetracycline. An experimental design based on the orthogonal experiments and single factor experiments was applied to determine the optimal reaction conditions.The effects of operating conditions such as initial pH, hydrogen peroxide concentration, molar ratio of Fe²⁺/H₂O₂ and reaction time on COD removal were investigated. Under the most favorable conditions, the highest removal rate of 75% was observed for COD and acute toxicity (toxic equivalent of HgCl₂) in final effluent was lower than 0.07 mg/L at reaction time of 60 min. In general, the best operating conditions were pH of 4, H₂O₂(30%) of 50 mL/L, H₂O₂/Fe²⁺ molar ratio of 20. The quality of final effluent indicated that it met the requirements of Discharge Standards of Water Pollutants for Pharmaceutical Industry Fermentation Products Category (GB21903-2008).