Chemical Industry and Engineering Progress ›› 2017, Vol. 36 ›› Issue (09): 3523-3530.DOI: 10.16085/j.issn.1000-6613.2017-0165

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Enhanced treatment of petrochemical reverse osmosis concentrate by an electro-Fenton process with dosing H2O2 and aeration

WU Yue1,2,3, SUN Yuwei2,3, WANG Dong4, ZHANG Jian2,3, HE Peiran2,3, LI Yuping1, ZHANG Zhongguo2,3, CAO Hongbin1   

  1. 1 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2 Environmental Protection Research Institute of Light Industry, Beijing 100095, China;
    3 Key Laboratory of Energy-Water Conservation and Wastewater Resources Recovery(Environmental Protection Research Institute of Light Industry), China National Light Industry, Beijing 100095, China;
    4 SINOPEC Beijing Research Institute of Chemical Industry, Beijing 102500, China
  • Received:2017-01-24 Revised:2017-05-11 Online:2017-09-05 Published:2017-09-05

曝气及外加H2O2强化电芬顿法处理石化反渗透浓水

吴月1,2,3, 孙宇维2,3, 王岽4, 张健2,3, 何沛然2,3, 李玉平1, 张忠国2,3, 曹宏斌1   

  1. 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
  • 通讯作者: 张忠国,博士,研究员,从事废水深度处理技术研究工作;李玉平,博士,研究员,从事废水深度处理技术研究工作。
  • 作者简介:吴月(1987-),女,硕士研究生,助理研究员,研究方向容为高浓度难降解废水深度处理技术。E-mail:wuyue_2000@sina.com
  • 基金资助:
    北京市自然科学基金(8162017)及北京市科学技术研究院海外人才专项(OTP-2013-015)项目。

Abstract: To reduce investment and sludge volume and to solve the problem of low production rate of H2O2 on 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 H2O2 concentration,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 H2O2 dosage of 150 mg/L,pH of 4,current intensity of 10mA/cm2,and air flux of 120L/h. After reaction of 10 min the removal of CODCr was up to 57.1%. Then at the reaction time of 60 min,the removal rate of COD was 66.7%,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"(DB 11/307-2013)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.

Key words: electro-Fenton, reverse osmosis concentrate, advanced oxidation process, aeration, petrochemical wastewater

摘要: 以铁板为阳极、不锈钢板为阴极,采取外加H2O2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H2O2低效率的问题。考察了H2O2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H2O2投加浓度150mg/L、pH=4.0、电流密度为10mA/cm2、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。

关键词: 电芬顿, 反渗透浓水, 高级氧化, 曝气, 石化废水

CLC Number: 

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