MBR-Fenton催化氧化组合工艺深度处理印染废水  

APPLICATION OF MBR-FENTON CATALYTIC OXIDATION COMBINED PROCESS IN ADVANCED TREATMENT OF PRINTING AND DYEING WASTEWATER

作　　者：汝伟 张建斌 钱伟杰 李世伟 郑炜 李荧 RU Wei;ZHANG Jian-bin;QIAN Wei-jie;LI Shi-wei;ZHENG Wei;LI Ying(Jiaxing Xiuzhou District Jiahong State-owned Assets Investment Co.,Ltd,Jiaxing 314000,China;Jiaxing United Sewage Treatment Co.,Ltd,Jiaxing 314000,China;Zhejiang Shuangyi Environmental Technology Development Co.,Ltd,Jiaxing 314000,China;Tsinghua Yangtze River Delta Research Institute,Jiaxing 314000,China)

机构地区：[1]嘉兴市秀宏建设投资集团有限公司,浙江嘉兴314000 [2]嘉兴市联合污水处理有限责任公司,浙江嘉兴314000 [3]浙江双益环保科技发展有限公司,浙江嘉兴314000 [4]浙江清华长三角研究院,浙江嘉兴314000

出　　处：《环境工程》2021年第11期149-153,158,共6页Environmental Engineering

基　　金：浙江省重点研发计划项目(2019C03106)。

摘　　要：针对印染废水含有难降解有机物,处理难度较高,仅通过生化处理难以实现达标排放的特点,对该废水先进行生化处理,经过膜生物反应器(membrane bio-reactor,MBR)系统出水,再采用三相Fenton催化氧化工艺对MBR出水进行处理。结果表明:生化段水力停留时间(hydraulic retention time,HRT)为22h时,MBR出水COD平均值为100.3 mg/L;出水NH_(3)-N、TN、TP均达到GB 18918—2002《污水综合排放标准》一级A标准。调节MBR出水pH=3,H_(2)O_(2)投加量为200 mg/L,FeSO_(4)投加量为200 mg/L条件下,反应HRT为2 h,Fenton催化氧化工艺出水COD为28.1 mg/L,色度为10.8倍,此时Fenton工艺吨水成本为1.01元/t。对进出水的三维荧光分析显示,污水含有较难生化降解的类芳香蛋白质物质,但Fenton催化氧化后仍能被有效分解。从处理效果和处理成本上看,生化处理和Fenton催化氧化组合工艺适宜该印染废水的处理,可为工程应用提供一定的借鉴意义。In view of the characteristics of printing and dyeing wastewater containing refractory organic matters,it is difficult to meet the discharge standard only through biochemical treatment.The wastewater was first subjected to biochemical treatment,an MBR system,and then Fenton catalytic oxidation process was used to treat the Membrane Bio-Reactor(MBR)effluent.The results showed that when the hydraulic retention time(HRT)of biochemical phase was 22 hours,the average COD of the MBR effluent was 100.3 mg/L;the effluent ammonia nitrogen,total nitrogen and total phosphorus all reached the first level A standard listed in GB 18918—2002.Under the conditions of MBR effluent pH=3,hydrogen peroxide dosage of 200 mg/L,ferrous sulfate dosage of 200 mg/L and reaction HRT of 2 hours,the COD of the effluent from the Fenton catalytic oxidation process was 28.1 mg/L,the chromaticity was 10.8 times and the operation cost was RMB 1.01/t.The three-dimensional fluorescence analysis of the inlet and outlet water showed that the wastewater contained aromatic protein like substances which were difficult to be biodegraded,but they could still be effectively decomposed after Fenton catalytic oxidation.From the perspective of treatment effect and treatment cost,the combined process of biochemical treatment and Fenton catalytic oxidation was suitable for printing and dyeing wastewater,which provided a certain reference for further engineering application.

关 键 词：印染废水 生化处理 MBR 芬顿催化氧化 

分 类 号：X791[环境科学与工程—环境工程]