大渡口污水处理厂CASS工艺脱氮系统的调试运行

第30卷第5期2010年9月西安科技大学学报JOURNALOFXIANUNIVERSITYOFSCIENCEANDTECHNOLOGYVo.l30No5Sept2010:1672-9315(2010)05-0583-04CASS*陈谱1,师小云1,花勇刚2,贺栋才2(1.,400039;2.,400045):重庆市大渡口污水处理厂设计规模为5万m3/d,采用CASS工艺选取污水处理厂活性污泥驯化后满负荷运行一个月的实际运行数据进行分析,找出污水处理厂运行中存在脱氮不理想的问题,并通过调整部分工艺控制参数,提高了脱氮效果,使出水水质稳定达标:CASS工艺;脱氮;去除率;C/N比:X703.1:A,8.22ha,6.25ha,CASS2005-11-29,2006-06-28,2006121411.15m3,1.CASS,11Tab.1Designqualityofinfluentandeffluentmg/LCODBOD5SSNH3-NTP350200300305602020151.51.2:1h;!MLSS3.5g/L;∀15d;#()174m3/min;∃20%;%DO2.5mg/L.1Fig.1Wastewatertreatmentprocess2,22007101520071113,1,NH3-N,TN,TP115,COD,BOD5,SS,,,NH3-N,TN,TPNH3-NTN,,TN31.1%,42.9%;NH3-N38.1%,73.3%;TP81%,,*:2008-10-29:(1975-),,,,.,,COD,BOD5,SSTP,,NH3-NTN2Fig.2Removalratesofpollutionindexesbeforedebugging3CASS3.13.1.1温度pH值及有毒物质,[1]pH,pH7.5~8.6[2];pH7.0~7.5[1],,[1,3,4]3.1.2溶解氧-[5-6],DO,DO2mg/L[1],CASS,DO,[7]3.1.3碳源与C/N比C/N,Lin[8],C/N3.5,;Matsumoto[9]5.25;[10],CODC/N,,TN3.1.4SRT与MLSSSRT,,;SRT,,,MLSS,,,[11-12]3.2pH,NH3-N;TN,3.2.1CASS池中曝气阶段DO浓度过低DO,(1#,2#3#)DO3~5,DO,DO,1#3DO1.29,1.621.93mg/L;2#3DO2.02,1.912.20mg/L;3#3DO1.81,2.391.85mg/L,,DO,DO,3DOFig.3ChangeofDOinaerationperiodofthefirstcycle4DOFig.4ChangeofDOinaerationperiodofthesecondcycle3.2.2C/N比过低营养物质缺乏C/N5.14,,C/N584西安科技大学学报2010年第5期陈谱等:大渡口污水处理厂CASS工艺脱氮系统的调试运行,8.1%.:TN,NH3-N,C/N,5DOFig.5ChangeofDOinaerationperiodofthethirdcycle3.2.3污泥颗粒细小影响同步硝化反硝化DO,,,SVI,22mL/g,SVI,44.11),,6Fig.6RemovalratesofpollutionindexesafterdebuggingNH3-N2)DO,,DO2~3mg/L,DO0.5mg/L.3)C/N,:,,;C/N,CASS4),,,,SVI,50~70mL/g.4.2200711,,TN55%,NH3-N75%&∋(GB18918(2002)BCOD,BOD,SS,NH3-H,TNTP65,C/N,,,GB(18918(2002)B,,CASSReferences[1],.[M].:,1998.ZHANGXingcan,LIYaxin.TechnologyofPhosphorusandNitrogenRemovalfromWastewater[M].Beijing:ChinaArchitecture&BuildingPress,1998.[2].pH[J].,1996,22(1):11-13.XULezhong.EffectofpHandalkalinityonNandPremovalsandcontrol[J].WaterandWastewaterEngineering,1996,22(1):11-13.[3]NeufeldRD,HillAJ,AdekoyaDO.Phenolandfreeammoniainhibitiontonitrosomonasactivity[J].WaterRes,1980,14(12):1695-1703.585[4],,,.[J].,2007,27(7):1083-1093.WENChaoha,iHEMinghe,RENYuan,eta.lPollutioncharacteristicsofcokingwastewaterandcontrolstrategies:biologicaltreatmentprocessandtechnology[J].ActaScientiaeCircumstantiae,2007,27(7):1083-1093.[5],.[J].,2005,28(3):16-17.ZHANGPeng,SUHong.Experimentalstudyonsimultaneousnitrificatindenitrificationbyanaerobicbiofilmsystem[J].EnvironmentalScienceandTechnology,2005,28(3):16-17.[6]HolmanJB,WarehamDG.COD,ammoniaanddissolvedoxygentimeprofilesinthesimultaneousnitrificationdenitrificationprocess[J].BiochemicalEngineeringJourna,l2005,(22):125-133.[7],,,.SBR[J].,1998,18(5):415-418.WANGShuying,PENGYongzhen,ZHOUL,ieta.lThecontrolparameterofSBRprocessanditsreactiontimeusingDO[J].ChinaEnvironmentalScience,1998,18(5):415-418.[8]LINYingfeng,JINGShunren,WANGTzewen,eta.lEffectsofmacrophytesandexternalcarbonsourcesonnitrateremovalfromgroundwaterinconstructedwetlands[J].EnvironmentalPollution,2002,119:413-420.[9]MatsumotoS,TeradaA,TsunedaS.Modelingofmembraneaeratedbiofilm:EffectsofC/Nratio,biofilmthicknessandsurfaceloadingofoxygenonfeasibilityofsimultaneousnitrificationanddenitrification[J].BiochemicalEngineering,2007,13:1016-1026.[10],,.CODC/N[J].,2005,21(12):19-23.HOUHongjuan,WANGHongyang,ZHOUQ.iEffectofInfluentCODConcentrationandC/Nratioondenitrification[J].ChinaWater&Wastewater,2005,21(12):19-23.[11],,.[J].(),2006,22(6):20-23.RENNanq,iWUYongzh,iWANGXiuheng.Newprocessfordenitrifyingphosphorusandnitrogenremovalandinfluencefactors[J].JournalofHarbinUniversityofCommerce(NaturalSciencesEdition),2006,22(6):20-23.[12],,,.pH[J].,2000,33(2):53-57.WANGShuying,DINGFeng,LUHongde,eta.lActivatedsludgebulkingduetolowpHvalue&organicloadinganditsresume[J].JournalofHarbinUniversityofC.E.&Architecture,2000,33(2):53-57.DebuggingandoperationindenitrificationsystemofCASSprocessinDadukouwastewatertreatmentplant*CHENGPu1,SHIXiaoyun1,HUAYonggang1,HEDongcai2(1.MunicipalandCommunicationDesignInstitute,ChinaCTDIEngineeringCorporation,Chongqing400039,China;2.FacultyofUrbanConstructionandEnvironmentalEngineering,ChongqingUniversity,Chongqing400045,China)Abstract:CASSprocessisasoptedatDadukouwastewatertreatmentplantinChongqingwiththedesignscaleof5*104m3/d.Analysisontheactualoperationdataoffullloadoperationforonemonthafteractivatedsludgeacclimationwasaimedatfindingthereasonsoflowefficiencyfordenitrificationinthesystemoperation.Andtheefficiencyofdenitrificationwasimprovedandtheeffluentwasstableandmetthewastewaterdischargestandardbyadjustingsomecontrolparametersofthisprocess.Keywords:CASSprocess;denitrification;removalrate;C/Nratio586西安科技大学学报2010年*Correspondingauthor:CHENGPu,SeniorEngineer,Chongqing400039,P.R.China,Te:l0086-13883095578,Emai:[e-mail]