无排泥条件下的膜-生物反应器系统处理焦化废水可行性研究

无排泥条件下的膜-生物反应器系统处理焦化废水可行性研究赵文涛1,黄霞1*,李笃中2,何苗1,袁媛1(11清华大学环境科学与工程系,环境模拟与污染控制国家重点实验室,北京100084;21台湾大学化学工程系,台北106)摘要:小试规模浸没式厌氧P缺氧P好氧-膜-生物反应器(A1PA2PO-MBR)系统用于处理实际焦化废水,在无排泥条件下连续运行160d.考察了长期运行条件下系统对不同污染物的去除性能,并通过亲疏水组分分离和三维荧光光谱法,对进出水焦化废水中溶解性有机物(DOMs)特征进行分析.结果表明,A1PA2PO-MBR系统能稳定去除8810%?116%的COD,>9919%的挥发酚,9914%?012%的浊度和9813%?119%的NH+4-N,相应的平均出水浓度分别为249mgPL?44mgPL、0118mgPL?0105mgPL、110NTU?012NTU和411mgPL?413mgPL;最大TN去除率可达到7419%.在系统160d运行过程中,MLVSSPMLSS维持在9012%?110%,没有出现无机物的积累;污泥的表观产率(MLVSSPCOD)逐渐降低并最终稳定在01035kgPkg.在焦化废水DOMs的疏水酸性、疏水中性、疏水碱性和亲水物4种组分中,疏水酸性物是进出水中最主要的溶解性有机碳(DOC)和色度组分,分别占进出水总DOC的70%和67%,总色度的75%和76%.三维荧光光谱分析表明腐殖质类物质是系统出水中残留的主要难降解有机物和致色物质.关键词:焦化废水;膜-生物反应器;无污泥排放;疏水酸性组分;三维荧光光谱;腐殖质类物质中图分类号:X784文献标识码:A文章编号:0250-3301(2009)11-3316-08收稿日期:2008-12-10;修订日期:2009-01-07基金项目:国家杰出青年科学基金项目(50725827)作者简介:赵文涛(1979~),男,博士研究生,主要研究方向为焦化废水处理和膜-生物反应器,E-mail:zwt02@mails.tsinghua.edu.cn*通讯联系人,E-mail:xhuang@tsinghua.edu.cnFeasibilityStudyonCokeWastewaterTreatmentUsingMembraneBioreactor(MBR)SystemwithCompleteSludgeRetentionZHAOWen-tao1,HUANGXia1,LEEDuu-jong2,HEMiao1,YUANYuan1(11StateKeyJointLaboratoryofEnvironmentalSimulationandPollutionControl,DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China;21ChemicalEngineeringDepartment,TaiwanUniversity,Taipei106,China)Abstract:Alaboratory-scalesubmergedanaerobic-anoxic-oxicmembranebioreactor(A1PA2PO-MBR)systemwasusedtotreatrealcokewastewaterandoperatedcontinuouslyfor160dwithcompletesludgeretention.Pollutantsremovalperformanceofthesystemwasinvestigatedthroughlong-termoperation.Thecharacteristicsofdissolvedorganicmatters(DOMs)ininfluentandeffluentcokewastewaterwereanalyzedusinghydrophilicPhydrophobicfractionation,andfurtherdiscussedbasedonfluorescenceexcitation-emission-matrix(EEM).TheresultsshowedthatA1PA2PO-MBRsystemcouldstablyremove8810%?116%ofCOD,>9919%ofvolatilephenol,9914%?012%ofturbidity,and9813%?119%ofNH+4-N,withindividualaverageeffluentconcentrationsof249mgPL?44mgPL,0118mgPL?0105mgPL,110NTU?012NTUand411mgPL?413mgPL