Fenton氧化法深度处理抗生素废水二级出水

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

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。

Fenton process was used to oxidize secondary effluent of wastewater with penicillin and oxytetra- cycline. 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 per- oxide 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 e- quivalent of HgC12） in final effluent was lower than 0.07 mg/L at reaction time of 60 rain. 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 In- dustry Fermentation Products Category （GB21903-2008）.