Fenton氧化法深度处理餐厨废水
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摘要
采用Fenton氧化法深度处理餐厨废水,通过正交试验和单因素试验研究了Fenton氧化处理的最佳反应条件,并通过酸碱滴定试验探讨验证了最佳初始pH为5的原因。结果表明,Fenton氧化法深度处理餐厨废水的最佳工艺条件为:H2O2投加量100mg/L、Fe~(2+)投加量300mg/L、初始pH5、反应时间60min,COD去除率可达70.4%,出水水质可达到GB8978—1996污水综合排放标准一级标准。同时,pH为5时废水中碱度基本消耗殆尽,Fenton反应过程中,由于产生了H~+,pH由5迅速降至3左右。
Food wastewater was treated by Fenton process.The optimal conditions were investigated by orthogonal experiments and single factor experiments and the result of initial pH was 5 which verified by acid base titration.The optimal conditions were as follows:H_2O_2 dosage of 100 mg/L,Fe~(2+)dosage of 300 mg/L,initial pH of 5,reaction time of 60 minutes.Under these conditions,the highest removal rate of 70.4%was observed for COD.The effluent index could reach the first criterion specified in Integrated Wastewater Discharge Standard(GB 8978—1996).The alkalinity was using up as the initial pH of 5,and it was observed that the pH decreased suddenly from 5 to 3 during the reaction because of H~+.
Food wastewater was treated by Fenton process.The optimal conditions were investigated by orthogonal experiments and single factor experiments and the result of initial pH was 5 which verified by acid base titration.The optimal conditions were as follows:H_2O_2 dosage of 100 mg/L,Fe~(2+)dosage of 300 mg/L,initial pH of 5,reaction time of 60 minutes.Under these conditions,the highest removal rate of 70.4%was observed for COD.The effluent index could reach the first criterion specified in Integrated Wastewater Discharge Standard(GB 8978—1996).The alkalinity was using up as the initial pH of 5,and it was observed that the pH decreased suddenly from 5 to 3 during the reaction because of H~+.
引文
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[2]张周,赵明星,阮文权,等.短程硝化反硝化工艺处理低C/N餐厨废水[J].环境工程学报,2015,9(9):4165-4170.
[3]王罕.餐厨垃圾废水的生物处理实验研究[D].苏州:苏州科技学院,2014.
[4]许凤刚,周婷婷,沈科.填料生物滴滤池处理餐厨废水性能研究[J].环境科学与管理,2013,38(8):122-126.
[5]吴彦瑜,周少奇.Fenton试剂处理腐殖酸废水影响特性和降解动力学模型[J].环境工程学报,2012,6(5):1435-1439.
[6]王艳秋,李明哲,朱秀慧,等.Fenton法对丁苯橡胶废水中COD和磷的去除研究[J].工业水处理,2015,35(5):42-44.
[7]Gogate P R,Pandit A B.A review of imperative technologies for wastewater treatmentⅠ:Oxidation technologies at ambient conditions[J].Adv Environ Res,2004,8(3/4):501-551.
[8]Katsumata H,Sada M,Kaneco S,et al.Humic acid degradation in aqueous solution by the photo-Fenton process[J].Chem Eng J,2008,137(2):225-230.
[9]狄彦强,刘杰民,刘思园,等.Fenton试剂法降解餐厨垃圾异味[J].环境工程学报,2014,7(4):1445-1450.
[10]Lin S H,Lin C M.Operation characteristics and kinetic studies of surfactant wastewater treatment by Fenton oxidation[J].Water Res,1999,33(7):1735-1741.
[11]国家环境保护总局.水和废水监测分析方法[M].北京:中国环境科学出版社,2002.
[12]Kang Y W,Hwang K Y.Effects of reaction conditions on the oxidation efficiency in the Fenton Process[J].Water Res,2000,34(10):2786-2790.
[13]肖惠群,顾早立,陶智伟,等.Fenton氧化法预处理并提高垃圾渗滤液可生化性的研究[J].环境科学学报,2015,35(12):3937-3942.
[14]潘孝辉,吴敏.Fenton氧化工艺深度处理酒精废水的试验研究[J].中国给水排水,2010,26(17):51-53.
[15]王宏哲,董利鹏,王芳芳,等.Fenton法深度处理褐煤提质废水[J].水处理技术,2015,41(12):87-89.