好氧颗粒污泥处理高浓度氨氮废水的研究张蓉蓉

:,,1981,,。#。好氧颗粒污泥处理高浓度氨氮废水的研究张蓉蓉任洪强#魏翔(,,210093)　　　,,C/N、。,(480mg/L)、30℃,15d,85%;,,;,。　　TreatmentofwastewaterwithahighNH+4-Nconcentrationbyaerobicgranularsludge　ZhangRongrong,RenHongqiang,WeiXiang.(StateKeyLaboratoryofPollutionControlandResourceReuse,theSchoolofEnviron-ment,NanjingUniversity,NanjingJiangsu210093)Abstract:　Physicochemicalcharacteristicsofaerobic-andanaerobic-originatedsludgesamplesinvariousstagesofaerobicgranulationwereobservedandcompared;thedifferencesbetweenthetwosludgetypesgraduallydisappeared.FullydevelopedaerobicgranularsludgewasthenemployedfortreatingawastewaterofhighNH+4-Nconcentration.Studieswereperformedtoobtainnitrificationratesandspecificoxygenutilizationrates(SOUR)oftheresponsiblebacteriaatdifferentC/Nratios.WithafeedNH+4-Nconcentrationof120mg/L,thesteadystateremovalwas95%;atahigherfeedconcentrationof480mg/L,theremovalratedroppedto85%.AlowerC/NratioresultedinahigherSOURofthenitrifyingbacteria.Astheammoniaconcentrationinthefeedincreased,thebacteriabecamemoreac-tive,andthenitrificationratesincreasedasaresult.Sincetotalnitrogenintheeffluentwasmuchlowerthanthatinthefeed,denitrificationpresumablytookplaceinanaerobicsectionofthegranularsludgesubjecttotheavailabilityoforganicsubstrate.Keywords:　AerobicgranularsludgeGranulationHighNH+4-NconcentrationSpecificoxygenutilizationrate(SOUR)Specificdegradationrate　　2090[1],,、[2-5],,。,,,C/N,。11.1　实验装置　　,1.5L,1L,H/D10/1,1。,DO2mg/L。1　1.2　实验用水　　,、、。pH8.0。COD100mg/L,788　　28　10　200610DOI:牨牥牨牭牴牳牭牤jcnki牨牥牥牨牫牳牰牭牪牥牥牰牨牥牥牪牥。1.3好氧颗粒污泥的理化特性　　,:MLVSS7.56～9.67mg/mL,SVI178mL/g。1.4　分析项目与方法　　DOYSIMODEL58;[6];N-(1-)-;;MLSSMLVSS。　　(SpecificOxygenUtilizeRate,SOUR)。SOURH,SOURNH4,SOURNO2,SOURN[7]。2　　,,。　　,:MLVSS、(EPS)SOUR,。　　,MLVSS。,,MLVSS;,,MLVSS。,MLVSS;,,MLVSS,,MLVSS7.80mg/mL。,,MLVSS。　　,,EPS,,。,,EPS,,EPS,EPS。45d,,EPS,EPSMLVSS28.8mg;EPSMLVSS20～25mg。EPS,,EPS,、。　　,SOURHSOURN,,SOURNSOURH。,、,。　　(120mg/L)95%,,。　　,,。DO,/,。2.1　提高氨氮负荷过程中反应器运行状况分析　　:20℃(34),25～28℃(56);DO3.0mg/L;25L/h;6h。　　:80%,,。,2～3d。　　、2。2　、789　　　,90%,TN10%。,,DO,TN,,,20,120mg/L。,,DO/,,。30,,240mg/L。,MLVSS6.13mg/mL,。40,480mg/L。　　2,,,(),TN,15%。28,,,TN25%,,,。,30℃,,,,(、)。40480mg/L,,。,,85%,TN20%。　　(1)、(2)。　　5CH3COOH+8NO-3→10CO2+6H2O+4N2+8OH-+E(1)　　3CH3COOH+8NO-2→6CO2+2H2O+4N2+8OH-+E(2)　　,,,,N2。COD,,,,TN。　　3。3,4(60、120、240、480mg/L)。(480mg/L),,4054%,。15d,85%。,,,,。3　、2.2　好氧颗粒污泥的SOUR的变化　　,SOUR。C/N,SOUR,[8]。　　,,C/NSOURNH4、SOURNO2SOURH,4。4　C/NSOUR:SS。　　4,,、,,。COD,。,SOURNH4SOURNO2,。　　5,,790　　28　10　200610SOURN/SOURH,。5　C/N　　5,SOURN/SOURHC/N100/320,100/480。,,,(、pH),,,480mg/L320mg/L。2.3　好氧颗粒污泥对氨氮的比降解速率的变化　　80d,4,1480mg/L,,。6。6　:VSS。　　6,,,20,1.1mg/h,,,,60～70,7.3mg/h,。,,,,,。3　　(1),30℃,,,。(480mg/L),15d,85%。　　(2),、。,。。　　(3),SOURN/SOURH,。　　(4),,,,,6070,7.3mg/h,。[1]　.:[C]..:[],2004.[2]　MorgenrothE,SherdenT,LoosdrechtMCM,etal.Aerobicgranulars1udgeinasequencingbatchreactor[J].Wat.Res.,1997,31(12):3191-3194.[3]　TayJH,LiuQS,LiuY.Aerobicgranulationinsequentials1udgeblanketreactor[J].Wat.Sci.Tech.,2002,46(4/5):13-18.[4]　,.[J].,1999,20(2):38-41.[5]　,,.[J].,2003,24(4):99-104.[6]　.[M].3.:,1989.[7]　JoannaSG.Nitrificationmonitoringinactivateds1udgebyox-ygenuptakerate(OUR)measurements[J].WaterRes.,1996,30(5):1228-1236.[8]　YangShufang,TayJH,LiuYu.Respirometricactivitiesofhet-erotrophicandnitrifyingpopulationsinaerobicgranulesdevel-opedatdifferentsubstrateN/CODratios[J].CurrentMicrobi-ology,2004,49:42-46.责任编辑:贺锋萍　(:2005-11-08)791