NO2作为电子受体对反硝化吸磷影响动力学研究侯红勋

NO-21,1＊,1,2(1.,　100022;2.,　100063):NO-2,NO-2,.(SBR)NO-2pH,A2O.SBR,,,NO-2.NO-2pH.,①pH,NO-2Andrews;②6.5pH8.0,pH,NO-2,pH,;③:rNmax:4.55mg(g·h),KSN:2.14mgL;rPmax:3.06mg(g·h),KSP:2.64mgL.:;;;NO-2;:X703.1　:A　:0250-3301(2008)07-1874-06:2007-07-16;:2007-09-17:(50628808);“”(2006BAC19B03);(D07050601500000);:(1977～),,,.＊,E-mail:[e-mail]csofNitriteActingasElectronAcceptoronAnoxicPhosphorusUptakeandDenitrificationHOUHong-xun1,PENGYong-zhen1,YINFang-fang1,LIUXiu-hong2(1.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,CollegeofEnvironmentalandEnergyEngineering,BeijingUniversityofTechnology,Beijing100022,China;2.BeijingCitySewageGroupCo.,Beijing100063,China)Abstract:Nitritehasbeenfoundinpreviousresearchaninhibitoronanoxicphosphorusuptakeinenhancedbiologicalphosphorusremovalsystems(EBPR).However,theinhibitingnitriteconcentrationreportedvariedinalargerangeandnokineticsstudyconcernedonanoxicphosphorusuptake.Thisstudyinvestigatesthenitriteinhibitiononanoxicphosphorusuptakewithsequencingbatchreactor(SBR)indifferentconcentrationsofNO-2andunderdifferentpHgradient.TheactivatedsludgewasculturedwithA2OOxidationDitchpilot-scalereactorperformingEBPR.TheprogressofSBRisasfollows:theactivatedsludgewastakenoutanaerobiczoneoftheA2OOxidationDitchtoSBR,thenphosphoruswasreleasedwithacetatefedinanaerobicphase,subsequentlyphosphorusuptakeproceededwithNO-2addedinanoxicphase.ItispointedthatnotonlyNO-2butpHinhibitedanoxicphosphorusuptake.Theresultindicatedthat①specificdenitrificationrateandspecificphosphorusuptakeratecorrelatedtheoriginalnitriteaccordwithAndrews'sinhibitionmodelundertheconstantpH.②IfpHwasintherangeof6.5to8.0,nitriteinhibitedDPRmuchstrongerwhenpHwasless,viceversa.③Kineticsparameterwasasfollows:themaxspecificdenitrificationratewas4.55mg(g·h),thehalfsaturationconstantofthedenitrificationprocesswas2.14mgL;andthemaxspecificphosphorusuptakeratewas3.06mg(g·h),thehalfsaturationconstantofthephosphorusuptakeprocesswas2.64mgL.Keywords:wastewatertreatment;biologicalphosphorusremoval;denitrifyingphosphorusremoval;nitrite;kinetics　　(EBPR),[1].EBPR(PAOs),PAOs(),β-(PHA),,,;,PAOsPHA,,,[2].,.PAOs.(DPAOs)NO-3NO-2PHA,.PAOs,PAOs,,29720087　　　　　　ENVIRONMENTALSCIENCEVol.29,No.7Jul.,2008DOI:10.13227/j.hjkx.2008.07.022[3～5].(SHARON)[6,7]NH+4NO-2,NO-2N2,,,.NO-2,,NO-2.,NO-22:①NO-2;②(FNA)[9].NO-2,,pH,NO-2[8].,pHNO-2[8～10].Zhou[9]FNANO-2,FNA,NO-2pH,(1):FNA=SN-NO2Ka×10pH(1),Kat(2)[10]:Ka=e-2300(273+t)(2)　　NO-2pHFNA.NO-2pHFNA,NO-2pH.A2O,,,pHNO-2,pHNO-2.1　1.1　A2O3,、、,3200、30075L,1.、1.;2.;3.;4.;5.;6.;7.;8.;9.;10.;11.;12.DO;13.ORP;14.pH1　Fig.1　Schematicdiagramofoxidationditchsystem　(HRT)0.5、1.518h,100%,25%,75%..,75%,,,,,.DO、ORP、pH.SBR,12L,1L,2.2　Fig.2　Schematicdiagramofexaperimentalsystem　1.2　,18757:NO-2.1.1　mg·L-1Table1　Qualityofrealdomesticwastewatermg·L-1COD296.5196.2514.5NH+454.246.963.7PO3-45.03.28.4TP5.63.810.4pH7.47.27.71.3　[11]..WTWlevel2pHpH,0.05molNaOHHClpH.,12L,,2h..2　2.1　pHNO-2NO-2,pH,pHNO-2.,A2O,(COD150mgL)2h,pH7.00±0.02,NO-2.3PO3-4NO-2.pH7.00±0.02,NO-220mgL,.2.51mg(g·h)1.68mg(g·h)..2.2　pHNO-22.1pH6.5、7.0、7.58.0NO-2,4.4,pH8.0Monod.pH8.0NO-2Monod,3　pH7.0PO3-4NO-2(NO-220mgL)Fig.3　VarietyofphosphorusandnitriteunderpH7.0(theinitialNO-220mgL)　4　pHNO-2Fig.4　RelationbetweenspecificdenitrificationrateandinitialnitriteunderdifferentpH　,NO-2,NO-2.pH6.5、7.0、7.58.0NO-2,5.5,pH8.0Monod.pH8.0NO-2Monod,,NO-2.3　3.1　pH8.0Monod[12](3):r=rmaxSSKS+SS(3)1876　　　　　　295　pHNO-2Fig.5　RelationbetweenspecificphosphorusuptakerateandinitialnitriteunderdifferentpH　,r,mg(g·h);rmax,mg(g·h);SS,mgL;KS,mgL.pHNO-2,NO-2Monod;NO-2,,NO-2,.pHMonod.Andrews[13],Andrews:r=rmaxSSKS+SS+S2SKI(4)　　,KIAndrews,mgL.(4)Monod,KI.KI,AndrewsMonod,2rmaxKS.Monod,NO-2(5):rN=rNmaxSNKSN+SN(5),rN,mg(g·h);rNmax,mg(g·h);SNNO-2,mgL;KSN,mgL.(5)(6):1rN=KSNrNmax×1SN+1rNmax　(6)　　KSNrNmax,1rN1SN.rmax,,.rNmax,KSN.pH8.0、NO-2,NO-2.,rmaxKS.,pH=8.0NO-2Monod.pH8.0Monod.pH=8.0(6),.:rNmax4.14mg(g·h),KSN1.95mgL.:rPmax2.78mg(g·h),KSP2.40mgL.pH8.0NO-2,,.,.rNmaxKSk,k1.05～1.15.k1.1,.Monod:rNmax4.55mg(g·h),KSN2.14mgL.rPmax3.06mg(g·h),KSP2.64mgL.3.2　pH7.5pH7.5Andrews,pH=7.5,NO-2Andrews,(4).(4)rmaxKS,,SN,,r,(4)KI,(4)(7):KI=S2Nrmaxr-SN-KS(7)　　KI,pH7.5KIN18777:NO-2KIP192mgL92mgL.NO-2(8),NO-2(9):rN=4.45×SSN2.14+SSN+S2SN/192(8),rN,mg(g·h).rP=3.06×SSN2.64+SSN+S2SN92(9),rP,mg(g·h).pH7.5NO-26.6　pH7.5NO-2Fig.6　RelationbetweenspecificdenitrificationrateandspecificphosphorusuptakerateandoriginalnitriteunderpH7.5　6,Andrews(8)(9).pH7.5,NO-2Andrews.3.3　pH,pH,NO-2,pH.3.2pH6.5、7.08.0KINKIP,2.2　pHmg·L-1Table2　InhibitoryconstantsunderdifferentpHmg·L-1pH6.57.07.58.0KIN2533192534KIP111892421　　KI,KI.pH6.5～8.0,pH,NO-2.2KIpH,7.7　KINKIPpHFig.7　RelationbetweeninhibitoryconstantKINandKIPandpH　KINKIPpH(10)(11):KIN=1×10-5×exp2.19×pH(10)R2=0.94　　KINNO-2Andrews.KIP=6×10-7×exp2.53×pH(11)R2=0.96　　KIPNO-2Andrews.(10)(11)(4),NO-2pH(12)NO-2pH(13):rN=rNmaxSSNKSN+SSN+S2SN(1×10-5×exp2.19×pH)(12)rP=rPmaxSSNKSP+SSN+S2SN(6×10-7×exp2.53×pH)(13)4　(1)NO-2,NO-2pH,pH,NO-2Andrews.(2)6.5pH8.0,pH,NO-2,pH,.(3)Andrew