处理污泥的热水解ASBR组合工艺研究

(),42,6,200611ActaScientiarumNaturaliumUniversitatisPekinensis,Vol.42,No.6(Nov.2006):2005212220;:20062022232ASBR1)2)1)(1),,518055;2),,100084)2,,(ASBR)(CSTR),2ASBR,,17030min,(HRT)20,10,7.55dASBRCSTR,ASBRHRT10d2ASBRTCOD2CSTR27193%25114%;;;X703.1IntegratedProcessofThermalHydrolysisandAnaerobicSequencingBatchReactorfortheTreatmentofSewageSludgeWANGZhijun1)WANGWei2)ZHANGXihui1)(1)ResearchCenterforEnvironmentalEngineering&Management,ShenzhenGraduateSchool,TsinghuaUniversity,Shenzhen,518055;2)DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing,100084)AbstractInrecentyears,thecombinedtechnologyofthermalhydrolysisandcontinuous2flowstirredtankreactor(TH2CSTR)forsewagesludgetreatmenthaveattractedmoreandmoreinterest.Inthispaper,theeffectsofthermalhydrolysispretreatmentonthecharacteristicsanddigestibilityofsewagesludgewereinvestigated,anaerobicsequencingbatchreactor(ASBR)insteadofCSTRwasusedandthentheintegratedprocessofTH2ASBRwasstudied.Theresultsshowedthatthethermalhydrolysispretreatmentcanimprovethedigestibilityandtheoptimumpretreatmentconditionswere170and30minretentiontime.Whenthermo2hydrolyzedsludgepretreatedunderaboveconditionwasrespectivelydigestedinASBRandCSTR(control),theorganicremovalefficienciesandmethaneproductionratesofASBRwerehigherthanthoseofCSTRwith20,10,7.5and52dHRTs,respectively.TheoptimumHRTofASBRwas10days.TheTCODremovalefficiencyandmethaneproductionrateofTH2ASBRprocesswere27193%and25114%morethanthoseofTH2CSTRprocesswith102dHRT,respectively.Keywordssewagesludge;thermalhydrolysis;ASBR;anaerobicdigestion,(HRT)(2030d)(VS30%40%)1978Haug[1](thermalhydrolysis,TH),20,[2,3][4][5,6][7],2,150180,1560min1997,Cambi2(Cambi)Hammer,[8],,(),647,(CSTR),TH2CSTR,(HRT),,CambiHRT17d,(ASBR)[9,10],ASBRCSTR,2ASBR11.1(1),(TS):34105gPL,(VS):18126gPL,(SS):32106gPL,(VSS):17158gPL,COD(TCOD):33125gPL,COD(SCOD):1816mgPL,NH32N:285mgPL900mL1L(,GS21),5,130150170190210,1530456075min(2)BMP,(BiochemicalMethanePotential,BMP),BMP1350mL40mL100mL50mL,1BMPFig.1SchematicdiagramofBMPtest(3)ASBR222()15cm4L,3L,1L,(351)2Fig.2Schematicdiagramofanaerobicsystems31,,10L(,GSH210),TS:2040gPL,SS:1830gPL,TCOD:3050gPL,SCOD:713gPL,TKN:10981445mgPL,:7231280mgPL(CaCO3),(VFA):18812581mgPL((31)),(351)2,CSTR80d,ASBR,,CSTR2HRT20107155d500dASBR(24h)(15min)(20h)(315h)(15min)41.2TSVSSSVSS:;COD:;pH:Orion868pH;:ZDJ24A;TKN:;NH32N:;VFA:SQ2206(FID);:SQ2206(TCD)[11]22.1VS,VSS95%3VSS,21075min17158gPL5144gPL,7476:2ASBR,VFA430minVFA,VFA50%,,3VSSFig.3VSSvariationsinallruns2.213060min4VFAFig.4VFAConstitutionsatdifferenttemperatureBMP30min,7180%29175%56158%44187%39151%60min,20100%37156%60197%46134%34163%170,170TCODBMP,190,BMP1BMPTable1BMPexperimentalresultsofthermallyhydrolyzedsewagesludgetPminTPVPmLTCODP%VSP%V(CH4)PVP%TCODP(mLg-1)0()20538111361725912416013022144131391046010317215026651178481116210720730170321561785313562144250190297521134714461188232210286511884519621892231302464612341129611211921502825219949196110822060170330571205417762173257190300501234612461108234210275501504712161155215SCOD,130150170190210(30min)SCOD60575389419552960mgPL,170,SCOD,,Elbing[6],(MaillardReaction),,(Melanoidins),,,[12],,,;,,,,1705170BMP,30min,,,,BMP847()42,17030min5170Fig.5Cumulativegasproductionof170run2.3ASBR17030min,ASBRCSTRHRT20107155d4HRT2260%,2HRT20107155d,ASBRCSTR15154%25114%39169%39182%ASBRCSTR,,HRT20107155d,ASBRTCODCSTR12138%27193%31116%34168%,pH71308100,21004000mgPLVFA(18812581mgPL),,HRT20d5d,2,VFA(200mgPL),2100mgPLASBR,,2Table2PerformanceoftwoanaerobicdigestionsystemsCSTRASBRHRT=20dHRT=10dHRT=715dHRT=5dHRT=20dHRT=10dHRT=715dHRT=5dPvol1%631210118621200178571101150571001180611740188601100190591021108571021150P(mLg)1932217532131301133022330219231832215812VSP%541322111451213120351601166331602111631771145551602144481202111401201178TCODP%601252105481202189401122101341052101671711155611662113521622180451862180SCODP%911860151911640165891501175891801170921670189921330175891930155901820158pH7149011271770108718601067151010871580110717401117193010571600105P(mgL-1)38431343546110250613021939038931453714100287511402423120SCODP(mgL-1)11204511517072960585501008321055406998052450VFAP(mgL-1)109150101411211551311118119026144160100261129213312102101114161241701772014515010820122()P(mgL-1)51102512250142813394114171351041101512748129415749140710082155231097210018176(NH32N)P(mgL-1)6713253040490456432069924657555564066928:gCOD(mL)ASBRCSTR,HRT,ASBR(TSVSSSVSS)6VS,ASBR,VSASBR,ASBR,,HRT20107155d,ASBRVS89120631664917142119gPLCSTR,,VS1212020115gPLASBRVSSASBRVSS(SolidRetentionTime,SRT),7SRTHRT21573173CSTR,HRTSRT,ASBRHRTSRTHRTSRT,ASBRCSTRHRT5d10d,ASBRTCOD45186%61166%,34145%HRT10d,ASBRTCODHRT,HRT10d20d,TCOD61166%67171%,9161%ASBRHRT20dTCOD,,HRT1,1,,,ASBRHRT10d9476:2ASBR6VSASBRFig.6VSprofilesalongtheheightofASBR7ASBRSRTHRTFig.7ComparisonofSRTandHRTwithinASBR,2ASBRTCOD2CSTR27193%25114%3,,:17030min,ASBRSRT,ASBRTCODCSTR,ASBRHRT10d2CSTR,2ASBR[1]HAUGRT,STUCKYDC,GOSSETTJM.Effectofthermalpretreatmentondigestibilityanddewaterabilityoforganicsludges[J].JWPCF,1978,50(1):73278.[2]STUCKEYDavid,McCartyPerryL.