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62 3 Vol.62 No.3 20113 CIESC Journal March 2011A2/O-陈永志,彭永臻,王建华,顾升波(,100124):C/N,A2/O-。A2/O,A2/O,;A2/O,,,;A2/O,。,HRT7.5h,15d,400%,COD、NH+4-N、TNTP376、67.9、72.9、6.1mg·L-1,COD、NH+4-N、TNTP42、0.86、9.6、0.1mg·L-1,COD;200%400%,1.49、1.64gTP·(gMLVSS)-1·d-1;,68.2%;,TP。:A2/O-;;;;;C/N:X703.1 :A:0438-1157(2011)03-0797-08DenitrifyingphosphorusremovalinA2/O-BAFprocessCHENYongzhi,PENGYongzhen,WANGJianhua,GUShengbo(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China)Abstract:Removalbehaviorsofbiologicalphosphorus(P)andnitrogen(N)inrealdomesticsewagewithlowC/Nratiowerestudiedinalaboratory-scaledanaerobic/anoxic/oxic(A2/O)-biologicalaeratedfilter(BAF)combinedsystem.Inordertoimproveremovalefficiencyofthecombinedsystem,shortsludgeretentiontime(SRT)wasappliedinA2/O,whichwasfavorableforPremovalanddenitrification,whilelongerSRTusedinbiologicalaeratedfilter(BAF),whichwasfavorableforpolyphosphate-accumulatingorganisms(PAOs)andfornitrificationtoremovetheammoniumnitrogen.TherecycledliquidinvolvingnitratefromBAFprovidedelectronacceptorenoughfortheanoxic-zonesofA2/Oandnecessaryconditionforde-phosphorusbydenitrifying.ExperimentalresultsshowedthatwiththeseoperationsinthiscombinedsystemCOD,NandPcouldberemovedsimultaneously.AtconditionsofHRT7.5h,SRT15d,therecyclingratioofliquid400%,theconcentrationsofCOD,ammoniumnitrogen,totalnitrogen(TN)andtotalphosphorus(TP)couldbereducedfromataveragevaluesof376,67.9,72.9and6.1mg·L-1intherawwastewaterto42,0.86,9.6and0.1mg·L-1intheeffluent,respectively.Therateofphosphorus 2010-05-24,2010-09-03。:。:(1969—),,。:“”(2008ZX07317-007-105,2008ZX07209-003);“”(QAK200802)。 Receiveddate:2010-05-24.Correspondingauthor:Prof.PENGYongzhen,pyz@bjut.edu.cn Foundationitem:supportedbythe11thNationalKeyScienceandTechnologySpecialProjects(2008ZX07317-007-105,2008ZX07209-003)andtheStateKeyLaboratoryofUrbanWaterResourceandEnvironment(HIT)(QAK200802). removalbydenitrifyingwere1.49and1.64gTP·(gMLVSS)-1·d-1atrecyclingratiosof200%and400%,respectively.TheresultsofbatchtestsshowedthatthepopulationofDPAOs(denitrifyingPAOs)wasupto68.2%ofthetotalPAOs.TheremovalefficiencyofTPdecreasedwithincreasingSRT.Keywords:A2/O-BAFprocess;denitrifyingphosphorusremoval;deeplybiologicalnitrogenandphosphorusremoval;nitraterecycleratio;sludgeretentiontime;lowC/Nratio (DPAOs)NO-3-N,(PHAs),,“”,,[1-5]。A2/O[6-7]。,A2/O、、,、,[8]。、、[9-12]。,,[13-14]。,C/N[15-16],,95%《》(GB18918—2002)A。,A2/O-,,A2/O,;A2/O,;,;A2/O,;C/N,,。,HRT,。C/N,[1,3],C/N,A2/O-,,,,A2/O,,。1 1.1 A2/O-A2/O、、,1。,220L。A2/O,30L,9,、。,,,。,20L。,2~3mm,,,;,D=100mm,H=1.67m,13L,r=20%。、、、。A2/O,,;,,;,;,NH+4-N,,A2/O,。1.2 A2/O。,·798· 62 1 A2/O-Fig.1 SchematicdiagramofA2/O-BAFbiologicalsystem ,1,A2/O,,50d,。1.3 ,24h,,1,A2/O。20d,NH+4-N80%,1NH+4-N100%。1.4 ,1。1 Table1 InfluentcharacteristicsParameterRangeAverageT/℃14—1615pH7.3—7.67.4COD/mg·L-1144—466376NH+4-N/mg·L-165.5—71.367.9NO-2-N/mg·L-10—0.220.004NO-3-N/mg·L-10—0.940.01TN/mg·L-166.8—74.172.9C/N3.0—6.75.2TP/mg·L-14.1—13.06.11.5 COD、NH+4-N、NO-2-N、NO-3-N、TP[17],TNTN/TOC(MultiN/C3100,),pH、DO(T)WTWpH/Oxi340i(),ORPWTW730pH()。1.6 2,1SRT15d,R0%、200%400%,1SRT,0.5SRT,;2SRT30d,R200%。1.7 A2/O-(15~20℃),2。1.8 A2/O-,ΔCano=CeffQR+Cana(Qin+QSlu)Qin+QR+QSlu-Cano ΔCano,mg·L-1;CeffTP,mg·L-1;Qin、QRQslu、,L·d-1;CanaCanoTP,mg·L-1。1.9 DPAOsWachtmeister[18],,DPAOs。:A2/O2L,COD,,,COD200mg·L-1,120min;,,·799· 3 :A2/O-2 Table2 OperationalconditionsusedinexperimentItemParameterValueQininfluentflow96L·d-1QRnitraterecycleflow0/192/384L·d-1Rnitraterecycle/influentratio0%/200%/400%rreturnsludge/influentratio96L·d-1HRT(anaerobiczone)hydraulicresidencetimeinanaerobiczone0.8hHRT(anoxic)hydraulicresidencetimeinanoxiczones5.0hHRT(aerobic)hydraulicresidencetimeinaerobiczones1.7hSRT(A2/O)sludgeresidencetime15/30dMLSS(A2/O,SRT=15d)mixedliquorsuspendedsolids3600mg·L-1MLSS(A2/O,SRT=30d)mixedliquorsuspendedsolids3900mg·L-1pH(BAF)effluent7.3—7.9DO(anaerobicandanoxic)dissolvedoxygeninanaerobicandanoxiczones0.1mg·L-1DO(aerobic)dissolvedoxygeninaerobiczones2—3mg·L-1DO(BAF)dissolvedoxygeninBAF5—6mg·L-1ORP(anaerobic)oxidationreductionpotentialinanaerobiczone-330—-350mVORP(anoxic)oxidationreductionpotentialinanoxiczones-150—-200mVORP(aerobic)oxidationreductionpotentialinaerobiczones20—25mVHRT(BAF)hydraulicresidencetimeinBAF0.5h,COD。2,1,DO2~3mg·L-1,1KNO3,NO-3-N50mg·L-1,,120min。2 2.1 A2/O-2TPA2/O-。0%、200%400%,TP6.15、6.205.91mg·L-1;,TP13.68、54.8456.67mg·L-1;TP17.76、6.883.57mg·L-1;TP4.37、0.200.10mg·L-1,TP28.0%、96.8%98.3%,200%400%TPA。R0%,A2/O,(VFAs)(PHAs),,(ATP)。0%,DPAOs,,2 TPFig.2 EvolutionofTPinA2/O-BAFsystematdifferentnitraterecycleratios ,TP;,,PHAs,TP。,HRT(1.7h),,TP。R200%400%,A2/O,DPAOsNO-3-N,PHAs,TP。,R200%400%1.491.64gTP·(gMLVSS)-1·d-1,,。:①DPAOs,·800· 62 ,,DPAOsVFAs,PHAs,DPAOs。②NO-3-N,Hu[19],,DPAOsNO-3-N,DPAOs30%,NO-3-N,DPAOsNO-3-N;,DPAOsNO-3-N。A2/O,,,,。③NO-3-N,,,,NO-3-N,DPAOsVFAsPHAs,。④C/NDPAOs,C/N,DPAOs“”,50%[20],,。⑤HRTDAPOs,DPAOs,,2molATP[21],,,,HRT。2.2 /、/ 、/3,DPAOs68.2%,DPAOs,DPAOs/,。2.3 A2/O-4CODA2/O-
本文标题:A2O曝气生物滤池工艺反硝化除磷陈永志
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