曝气及外加H_2O_2强化电芬顿法处理石化反渗透浓水  

Enhanced treatment of petrochemical reverse osmosis concentrate by an electro-Fenton process with dosing H_2O_2 and aeration

作　　者：吴月[1,2,3] 孙宇维 王岽[4] 张健 何沛然 李玉平[1] 张忠国 曹宏斌[1] WU Yue;SUN Yuwei;WANG Dong;ZHANG Jian;HE Peiran;LI Yuping;ZHANG Zhongguo;CAO Hongbin(Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Environmental Protection Research Institute of Light Industry,Beijing 100095,China;Key Laboratory of Energy-Water Conservation and Wastewater Resources Recovery(Environmental Protection Research Institute of Light Industry),China National Light Industry,Beijing 100095,China;SINOPEC Beijing Research Institute of Chemical Industry,Beijing 102500,China)

机构地区：[1]中国科学院过程工程研究所,北京100190 [2]轻工业环境保护研究所,北京100095 [3]中国轻工业节能节水与废水资源化重点实验室,北京100095 [4]中国石油化工股份有限公司北京化工研究院,北京102500

出　　处：《化工进展》2017年第9期3523-3530,共8页Chemical Industry and Engineering Progress

基　　金：北京市自然科学基金(8162017);北京市科学技术研究院海外人才专项(OTP-2013-015)项目

摘　　要：以铁板为阳极、不锈钢板为阴极,采取外加H_2O_2的方式构建电芬顿体系,处理石化废水反渗透浓水,以降低投资,减少污泥量,解决阴极产生H_2O_2低效率的问题。考察了H_2O_2投加量、pH、电流密度,特别是通气条件等因素对废水处理效果的影响。研究发现,曝气可有效强化电芬顿过程,显著提高有机物去除率,改善污泥沉降效果。在H_2O_2投加浓度150mg/L、p H=4.0、电流密度为10m A/cm^2、空气曝气量为120L/h的条件下,反应仅10min,COD去除率即可达57.1%,继续反应至60min,COD去除率最大可达66.7%,出水COD<20mg/L,满足北京市《水污染物综合排放标准》(DB 11/307—2013)中A类排放限值。该电芬顿法在短时间内即可高效处理石化废水反渗透浓水,污染物去除率显著高于相关研究结果,具有广阔的应用前景。To reduce investment and sludge volume and to solve the problem of low production rate of H2O2on cathode,an electro-Fenton system using iron and stainless steel sheets as anode and cathode respectively was established for treating reverse osmosis concentrate of petrochemical wastewater.The effects of H2O2concentration,pH,current density,and aeration conditions on treatment efficiency were investigated.The results showed that aeration could effectively enhance the electro-Fenton process,improve the removal of organic matter,and significantly increase sludge settling velocity.The optimum conditions were H2O2dosage of150mg/L,pH of4,current intensity of10mA/cm2,and air flux of120L/h.After reaction of10min the removal of CODCr was up to57.1%.Then at the reaction time of60min,the removal rate of COD was66.7%,with the effluent COD<20mg/L,and the main indicators of the treated water satisfied the class B emission limits of“Integrated Discharge Standard of Water Pollutants”(DB11/307-2013)of Beijing.The method can effectively treat the RO concentrate of petrochemical wastewater in a short time,with a higher pollutants removal than those reported by other relevant researches,and so has a wide application prospect.The enhancement of aeration on pollutants removals found in the study will probably become a hot area of research and application in the future.

关 键 词：电芬顿 反渗透浓水 高级氧化 曝气 石化废水 

分 类 号：X742[环境科学与工程—环境工程]