Sludgeconcentra省略manceofUNITANK

Avsilsbloeni!nsGt(2)X(7)141一417JOURANLOFEINVRNOMETANLEEISSNCCISSN1001一0742CN11·6922尹X·留·nConnccetraitondynamicidstributionnaidtsimPcatonthePerofrmonceafUNll’ANKZHANFGa一gnel,LluJun一xinl,’,SulJunZ1.Resea麟〔触月etrforE’”疮湘,iornmenatlcSiences,hCineseAe口de娜ofsclence又Beiijng]侧刀召民hCina.-Email:Dusrinzh@2匆.ner2.Gua昭zhouMuniciPalnEgineer功9DesignandResea滋nIsittute,Gau昭zhou多I次巧0,hCinaReceived3MarchZ《X巧:vreised11MayZ《X拓:accePted29MayZ《X巧AbstmCtUNITANK15abiologieiawastewatertreatmentProcesshtateombinestheadvantagesoftraditionalactivatedsludgeProcessandsequeneingbatehreactor’which15idvidedinto毛现kA,BandC.Inthisstudy,htesludgedisitrbotionanditsimPactonpedbnnaneeofUNITANKweere别rriedoutinLiedeW血stewaterPlant(WWTP)ofGuangzhou,China.ResultsshowedhtatheterwasasotrngiaffliationbetweenaTnkAandBofhtesysetminsludgeeoneentrationidsitrbution.TheinitialsludgeeoneentrationinaTnkAeouldPersenthtesludgeidsitrboitonofhetwholesysetm.hTesludgedisitrbotionwasmianlyinflueneed勿hydrauliceondition.UnsteadysludgedisitrbotionhadanimPactonviarationsofsubstratesineractors,espeeiallyindeeisivereactor,andtihseouldleadtoiafluerofsysetm.SettlereouldPartiallyermovesubstratessuehasCODandN03一N,buttherewasedventuerofsludgedeteiroartion.Therationalinitialsludgeeoneentratlonin毛mkAshouldbe40(准巧0(刃m留LMLSS.eKywords:UNITANK:sludgeeoneentration:dynanuedisitrbution;in一PocressstudyIntmdUCtionUNIATNK15abiologiealwasetwaetrtreatmentPro-eesshtateombineshteadvanatgesoftradiitonalaetivatedsludgeProeessandsequeneingbaetheractor(SBR).It15oneereantgulareraetorwhieh15dividedintothreetanks,namedasaTnkA,BandC(iFg.l).hTevolumesofhtehtereantksaersameandeachantk15equiPPedwihtaeraitonandagitaitonsysetms.hTeProeesswokrsaeeordingtoaeyelieoPeraiton,ofwhiehaTnkBwokrsaseraetoronly,几nkAandCaseithereractororsettle.rhTehteretanksaereonnecetdwihteachohterbyPIPeformbottomorviaPeirbratedwall.hTewasetwater15fedotaTnkA,BandCaletmiatvelyandhteeleanedwaetr15disehagredform毛川kCorA.hTeeraernoPirmayrsettlerandsludgeertumafeiliites.UNIATNK15eommonlyeonsideerdasmodiifedSBR.However’it15quietdiffeerntformSBRineonifgurationandhydraulieeondiitonbeeausebohtinfluentandeiffuentareeontinuous.Inasense,it15moersimilartoano-rmalmulti一eractorPcoress,suehasA/OorUCT,butnosludgeormixedliquorerutms.UNIATNK15notsPeeialineonifgurationanditsbiologiealProeessesseemnodiffeerneefromusualbiologiealetratmentmeehanisms,suchasdegradationofograniccarbon,transfomrationofniotrgenandermovalofPhosPhours(Barkeretal.,1997:Bdjranovieetal.,21刃0;Henzeetal.,1987,1995,1999).hTePartieularadvantagesofUNIATNKincludeeonstrUetion一eomPaet,sPace一svaing,eost一effeetive,flexi-bleoPeartionandeasytomianetnanee.AletnrateeonotrleanPeformraeyeleofhteanaeorbie,anoxie,aeorbieandsettlingeonditionsinonetankotermoveograniesubstraetandenhaneebiologiealnuitrentermoval.Sincehteurnningseheme15flexible,it15diiffeulttoanalyzeitsPeformranee.UNIATNK,sitretlysaying,15notasetadilyurnningsysetmbeeausesludgeeoneentraitonsinalltanks,hydarulieeonditionandeiffuentqualityaerunsteady.Howtoestimateitseharacetirsties15stillunsuer.hTeeonclusionsformlab一sealeorPilot一sealeexPeirmentsdonotalwayswokrwellinfull一sealePlantsincehteyaerquietdiffeernt.Additionally,liltteatetnitonhasbeengivenotUNIATNKPeformranee50htein一Poreessstudy15neeessayrandusefultomendUNITANK.SineenosludgeerutnrsinothteUNIATNKeractors,hetsludgedisitrbutionwillbediffeerntinaTnkA,BandC,andehangeswihtOPeraitonitme.hTissludgedisitrbuitonwillinflueneehtePeformraneeofUNIATNK.hTeerfoer,htesludgedisitrbu-tioninhtetanksanditsimPactonUNIATNKPeformraneeweerinvestigatedinhtisPaPe.rUNIATNKPoreess15usedinLiedeW么stewaterTreat-mentPlant(WWTP)ofGuangzhouCityandhtestudywasearriedoutinthisPlantinoneyearof20()4.hTestudywasifrstfoeusedonthesludgedisitrbuitoninhtetanksandthenonhtein一ProeessPeformraneeofUNITANK.IMaetrialsandmethodProjcetsuPpoertdbyhetNaitonal(No.50238050).*Co讹sponidngNatualrSeieneeFoundiatonofChinaauhto.rE一mial:[e-mail].1.1Full·sealeUNTI’ANKP,csseAbout260000m3/dofwastweaetrwasetratedbyhteZHANGFa~genetaL从】1.19竺AAAAABBBCCCAAAAABBBCCCCCAAABBBCCCAAAAABBBCCCCC人人BBBCCCAAAAABBBCCCCCAAABBBCCC人人人BBBCCCCCAAABBBCCCGm叩2GorUP4Fig.1OCnfiguartionofeonvenoitnaiUNITANK.Fig.3LayoutofUNITANKProcessniLideeWWTRUNITANKProeessinLiedeWWT.PThelyauotofUNI-TANKPoreess15shwoninFlg.2.InhtisUNIATNKProeess,hteeraereightindependentUNITANKunits,whiehfomrfourgrouPs(goruPI一),andeaehgoruPineludestwoParallelUNITANKunits(Fig.3).hTeinelined一utbesysetmsaerequippedinaTnkAandCofeachunit(Fig.1)toineerasehteeiffeieneyofsolid-liquorseParatlon.Eachunithasaotatleffeeitvevolumeorabout14X()0m3.仆erawwasotwaetr15lifetdbypumpwihtameanflowarteor1365m3h/intoeachunitandhtecoerrsPondinghydrauileeretntionitme(HRT)15about10h.Wihtlowsubstr砒eoneen加tions,htearwwastewaetrwastyPiealinSouhtenrChina.BODSwasbewteen50and120m幼“wihtaveargeof84mgI/J.CODwasbetween90and200m留Lwihtvaerageof150m留L,ofwhiehss,51,XsandXlaceounetdforabout14%,16%,43%and27%,ersPeeitvely.55wasbewteen80and16Om留Lwihtvaerageof104mg/L.NH3一Nwasb