倒置AAO工艺中物料及能量流向的研究朱五星

1　3环境工程学报Vol.1,No.320073ChineseJournalofEnvironmentalEngineeringMar.2007AAO朱五星　汪诚文　施汉昌(,,100084)　　,AAO、、,。　AAO　　　X703　　　A　　　1673-9108(2007)03-0050-05Materialandenergyflowofactivatedsludgeinanoxic-anaerobic-aerobicsystemZhuWuxing　WangChengwen　ShiHanchang(StateKeyJointLaboratoryofEnvironmentSimulationandPollutionControl,DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084)Abstract　Inthisstudythematerialflowofcarbon,nitrogenandphosphorusintheactivatedsludgesystemofanoxic-anaerobic-aerobicwasanalyzedinafull-scalewastewatertreatmentplant,andtheresultshowslowCODbalance(75.8%),highPandNbalance.Moreovertheenergyflowbasedonmaterialbalancewasana-lyzedinthissystemKeywords　anoxic-anaerobic-aerobicsystem;materialflow;energyflow:2004-04-13;:2005-05-24:(1978～),,,。E-mail:[e-mail]　　(COD)、、[1],,,,AAO,,。COD、N-NH4、N-NOx、TP、P-PO4、SS、、TNDO,,,。1　1.1　AAO--,20t,[1],4,3156m,1,51m,,85.9m,,331.1m,5t/d,13.5h,,5.5h。,AAO,。1.2　AAO,、,N-NO3。2　2.1　COD,、,COD1。,,,3:AAO1　CODFig.1　CODbalanceinactivatedsludgeunitOUCCO2COD;CODOCOD;CODiCOD;CODEXPCOD。:OUC=OUC,O2+OUC,ND(1)OUC,ND=2.86Mdent,T(2)OUC,O2=OOU×Vaer×24-4.57×ONO3(3):OUC,OUC,ND,OUC,O2,CO2COD、CO2CODCO2COD(kgCOD/d);Mdent,T(kgN/d);OOU,Vaer,ONO3(O2mg/Lh)、(m3)(kgN/d),COD(CODin、CODout、COD):CODout=CODo+CODXEP+OUC　　(kg/d)(4)　　　　　CODo=Qo×SCODi　　(kg/d)(5):CODXEP=q×XV×fCVfCVCOD;q,XV(m3),VSS(g/m3);Qo,SCODi(m3),COD(g/m3);CODin=CODi+CODBA　　(kg/d)(6):CODiCOD(kg/d);CODEXPCOD(kg/d);CODBA(kg/d)。N2。:,COD、N2　NFig.2　NitrogenbalanceinactivatedsludgeunitNDN;TNo;TNi;NEXPMdent,T=Mdenit,anox+Mdenit,anaer　(kg/d)(7)(4)Mdenit,anox(kg/d),Mdenit,anaer(kg/d)N(Nin、Nout、N):Nin=Sin,TN×Qin　(kg/d)(8)Nout=MN,TN+MN,EXP+Mdenit,T　(kg/d)(9)MN,EXP=q×XV×fNV　(kg/d)(10):fNVN(kgN/kgVSS);MN,TN(kg/d);MN,EXP(kg/d)。CN,P,,。,,,P3。3　PFig.3　PhosphorusbalanceinactivatedsludgeunitPO;Pi;PEXPP:Min,TP=SPi×Qin　(kg/d)(11)Mout,TP=SPo×Qo+PEXP　(kg/d)(12):Min,TP,Qin,SPoP(kg/d);(m3/d);P(g/d)。Mout,TP,Qo,SPoP(kg/d);(m3/d);P(g/m3)。5112.2　、N、PAAON、COD、P1。1　Table1　Operationalandexperimentaldataofactivatedsludgesystem(4200311)(AveragevalueinNov.2003ofoneofthefourparallelactivatedsludgeserials)V1(m3)3060Q(1000m3)50V2(m3)5034r0.57V3(m3)19866q(1000m3)2.45(mg/L)4111.3t(h)13OU(O2mg/Lh)28.3(m/s)0.06COD(mg/L)406()　69.1　57.5　42.96　40.4N-NH4+(mg/L)42.7　32.38　30.11　1.72　4.03N-NO3(mg/L)1.476　2.01　1.33　23.7　25.2TP(mg/L)6.5　13.61　13.67　14.63　0.43PO4(mg/L)3.45　9.198　10.20　0.19　0.36SS(mg/L)268.8　1820.4　1878　2155　31.82.2.1　关于COD平衡的计算COD,CODfCV=1.48mgCOD/mgVSS[2],,f=VSSmg/SSmg=0.68,COD:CODEXP=f×q×XV×fCV=0.68×2450×4111×1.48=10136.4kgCOD/d(13)COD:CODo=(Q-q)×STe=(50000-2450)×40.4=1921.01kgCOD/d(14)(1)CO2COD:OUC=OUC,O2+OUC,ND=5469.8kgCOD/d(4)COD:CODout=CODo+CODEXP+OUC=15608kgCOD/d(15)(3)COD:CODin=CODi+CODBA=20349+245.8=20594.8kgCOD/d(16)CODBANO3-N。4　CODFig.4　ResolvableCODplotinactivatedsludgesystemCODηCOD:ηCOD=CODout/CODin=12820/20594.8=75.8%,AAO24.2%COD,(、),Dold,AAOCOD60%～70%[3]。COD[4],,CODCOD,4,、、0.45μCOD18.5、11.614.5mg/L,CODCOD35%。COD523:AAO,COD,,COD。2.2.2　关于N平衡的计算,:Mdenitr,anox=(Q×Sin,NO+3+r×Q×Saerobic,NO+3)-(1+r)×Q×Sanoxic,NO+3=50000×1.476+0.57×50000×25.2-1.57×50000×2.01=634215gN/d(17)(14):Sin,NO+3,Saerobic,NO+3,Sanoxic,NO+3,,:Mdenitr,anaer=(1+r)×Q×Sanoxic,NO+3-(1+r)×Q×Sanaerobic,NO+3=1.57×50000×2.01-1.57×50000×1.33=53380gN/d(18):Sanoxic,NO+3,Sanaerobic,NO+3,。AAO():Mdent,T=Mdenit,anox+Mdenit,anaer=687.631kgN/d(19):MN,TN=(50000-2450)×32=1521.6kgN/d(20),NfNV=0.1mgN/mgVSS[5],N:　　　MN,EXP=f×q×XV×fNV=0.68×4111×2450×0.1=684.9kgN/d(21)N:　　　Nout=MN,TN+MN,EXP+Mdenit,T=1521.6+684.9+687.631=2894.1kgN/d(22)N:50000×59.1=2955kgN/d,N:ηN=2894.1/2955=97.9%,N,5,N223.8%。5　Fig.5　Nitrogendistribution2.2.3　关于P平衡的计算TP:Min,TP=50000×6.5=325kgTP/d(23)TPfP3%[5],(9)TP:Mout,TP=SPo×Qo+PEXP=(50000-2450)×0.43+2450×4113×3%=322.8kgTP/d(24)P:ηP=322.8/325=99.3%,P,TP。　　TP,6。P,91%。6　PFig.6　Phosphorusdistribution2.3　AAO,,,。,,531,。(12059kJ/kWh),BODCOD,13.9kJ/gCOD,14.8kJ/gCOD[6]。AAO,11COD406mg/L,(16),COD20594.8kgCOD/d,40.4mg/L,(15),COD1921.01kgCOD/d;(13)10136.4kgCOD/d。AAO(),2。2　AAOTable2　Energydemandofequipmentsinanoxic-anaerobic-aerobicsystemKA22S-GL225,Q=24100m3/h,N=630kW32NP3127,Q=159m3/h,H=12m,N=5.9kW22LL3301,Q=1428m3/h,H=5.7m,N=37kW22　　2,1975.8kW,493.95kW,,AAO3。3　AAOTable3　Energyflowinanoxic-anaerobic-aerobicsystem(kJ/d)(%)(kJ/d)(%)286.26×10667142.96×1063326.70×1066150.02×10635252.51×10659429.22100429.22100　　3,AAO,59%,,,,,。3　　(1),AAOCOD,COD24.2%COD,,AAOCOD,。NP,96%,,AAO,N,23.8%,P,P91%。(2),AAO,:6%,35%,59%。[1]NowakO.,eta.lParameterestimationforactivatedsludgemodelswiththehelpofmassbalances.Wa.tSc.iTech.,1999,39(4):113～120[2]Shun-HsingChang,eta.lThebiomassfractionsofhetero-trophsandphosphate-accumulatingorganismsinanitrogenandphosphorusremovalsystem.Wa.tRes.,2000,34(8):2283～2290[3]BarkerP.S.,eta.lCODandnitrogenmassbalanceinacti-vatedsludgesystems.Wa.tRes.,1995,29(2):633～643[4]EwaLie,eta.lCarbonandphosphorustransformationsinafull-scaleenhancedbiologicalphosphorusremovalprocess.Wa.tRes.,1997,31(11):2689～2693[5](HenzeM.)..:,2001[6]OwenW.F.,,..:,198954