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环境工程学报 2013
Advanced treatment of secondary effluent of antibiotic wastewater using Fenton oxidation method
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Abstract:
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).