电氧化处理印染行业膜后浓水的研究  

Treatment concentrated wastewater of membrane fromdyeing industry by electrochemical oxidation process

作　　者：陈安妮 童展梁 姚佳超 孙欢红 CHEN Anni;TONG Zhanliang;YAO Jiachao;SUN Huanhong(College of Biology and Environmental Engineering,Zhejiang Shuren University,Hangzhou 310015,China;Hangzhou Municipal Ecology and Environment Bureau Tonglu Branch,Hangzhou 311500,China)

机构地区：[1]浙江树人大学生物与环境工程学院,浙江杭州310015 [2]杭州市生态环境局桐庐分局,浙江杭州311500

出　　处：《工业水处理》2021年第11期51-55,共5页Industrial Water Treatment

基　　金：国家自然科学基金(51878614);浙江树人大学省属高校基本科研业务费专项资金项目(2021XZ002);浙江树人大学2020年浙江省大学生科技创新活动计划(2020R420016)。

摘　　要：采用电氧化法处理印染行业膜后浓水,以Ti/PbO_(2)为阳极、Ti为阴极,考察了流速、初始pH、电流密度和氯离子投加量等对COD去除的影响,并探讨了其氧化机理与反应动力学。结果表明,在流速100 mL/min,初始pH=6,电流密度10 mA/cm^(2),氯离子质量浓度500 mg/L时,电解120 min后,COD的去除率为81.3%,电流效率为43.5%,降解单位COD能耗为36.2 kW·h/kg,且COD主要被羟基自由基和活性氯氧化去除,其降解过程符合一级动力学模型,反应速率常数为0.0133 min^(-1)。膜后浓水经电氧化处理后,出水水质满足《污水综合排放标准》(GB 8978—1996)一级标准。The concentrated wastewater of membrane from dyeing industry is treated by electrochemical oxidation process.The effects of flow rate,initial pH,current density,and chloride ion concentration were investigated with Ti/PbO_(2) anode and Ti cathode.And the mechanism and reaction kinetics were also studied.The results showed that COD removal rate of 81.3%,current efficiency of 43.5%,and energy consumption per unit COD of 36.2 kW·h/kg were achieved with operating conditions of flow rate of 100 mL/min,initial pH of 6,current density of 10 mA/cm^(2),and chloride ion concentration of 500 mg/L.COD was mainly oxidized by hydroxyl radical and active chlorine.Besides,COD removal followed first order kinetic model,and the reaction rate constant of 0.0133 min^(-1) was obtained.The effluent treated by electro-chemical oxidation met the first class standard of Integrated Wastewater Discharge Standard(GB 8978—1996).

关 键 词：电氧化 浓水 印染废水 电流效率 能耗 

分 类 号：X703[环境科学与工程—环境工程]