A2O工艺中反硝化除磷及过量曝气对生物除磷的影响王晓莲

　56　8　　　　　　　　　　　　　　　　　　Vol.56　No.8　20058　　Journal　of　Chemical　Industry　and　Engineering　(China)　　August　2005A2O王晓莲1,王淑莹1,马　勇2,彭永臻1(1,100022;2,150090):,,“”,.,--(A2O).,A2O,PHB,,71.3%,25%.COD200mgL-1400mgL-1,COD、,10mgL-10.30mgL-1.,,,,,.:A2O;;;:X703.1　　　　　　:A:0438-1157(2005)08-1565-06AnoxicbiologicalphosphorusremovalandeffectofexcessiveaerationonbiologicalphosphorusremovalinA2OprocessWANGXiaolian1,WANGShuying1,MAYong2,PENGYongzhen1(1SchoolofEnvironmentalandEnergyEngineering,BeijingUniversityofTechnology,Beijing100022,China;2SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,Heilongjiang,China)Abstract:Apilot-scalenutrientremovalactivatedsludgesystem,basedontheA2Oconfiguration,wasusedtotreatbrewerywastewater.Intheexperiment,theexistenceofdenitrifyingphosphorusremovingbacteria(DPB)andthecontributionofDPBtophosphorusremovalwasobserved.ThetestsshowedtheaveragetotalamountofanoxicPuptakeaccountedfor70%ofthetotalamountofPuptakeofthesystematsteadystate,oxygenrequirementcouldbedecreasedsignificantly(about25%).DenitrifyingphosphateremovalresolvedthecompetitionfororganicsubstratesbetweenPoly-Porganismsanddenitrifiersunderlowerorganicloading.Effluenttotal-Pconcentrationcouldachievelessthan0.30mgL-1andaverageeffluenttotal-Nwaslessthan10mgL-1.Itisclearlydemonstratedthatthephosphorusuptakealmoststoppedinanover-aeratedsystem,thereleasedphosphoruscouldnotbetakenupfullyagain.Consequently,incompletephosphorusuptakeledtotemporaryreductionofbiologicalphosphorousremovalefficiency.Ittookaboutthetimeofonesludgeagetoeliminatethatdisturbance.Keywords:A2Oprocess;anoxicbiologicalphosphorusremoval;excessiveaeration;biologicalnitrogenandphosphorusremoval　　2004-07-05,2004-08-31.:.:(1977—),,.:(20377003),(2003AA601010)(H020620010120).　　　Receiveddate:2004-07-05.Correspondingauthor:PENGYongzhen.Foundationitem:supportedbytheNationalNaturalScienceFoundationofChina(20377003),theNationalHighTechnologyDevelopmentProgramofChina(2003AA601010)andtheProjectofBeijingScienceandTechnologyCommittee(H020620010120).　　、,.,,.A2O、、,、(PAO)、、,,,,,,.A2O,(DPB)[1～3],,PHB,,,,,.,,COD50%,30%50%,,.A2O,A2O,,,“”,、,.1　1.1　A2/O1.,8,,,、,4.51L,∶∶∶1∶1.5∶2.5∶5.,25L.1,,,.,.、,、.21℃,:150Ld-1,HRT8.5h,SRT12d,MLSS3000mgL-1,0.5,2.5,DO2～3mgL-1.Fig.1　SchematicdiagramofA2Oprocess1—feedtank;2—peristalicpump;3—pre-anoxic;4—anaerobic;5—anoxic;6—aerobic;7—settler;8—airpump;9—airflowmeter;10—stirrerQin—influent;QR—internationalrecirculationflow;Qr—returnsludgeflow;Qw—wastedsludgeflow　1.2　,COD,NaHCO3NaOHpH.:(3～3.4mlL-1),(0.1～0.30gL-1),KH2PO4(0.02～0.07gL-1),NaHCO3(0.05～0.15gL-1),MgSO47H2O(0.05gL-1),CaCl22H2O(0.01gL-1),1.Table1　CharacteristicsofinfluentwastewaterParametersMin/MaxAverageCODCr/mgL-1180—460342.8BOD5/mgL-1122.4—226.8175.46NH+4-N/mgL-136.6—55.845.44TN/mgL-143.3—63.848.56PO3-4-P/mgL-16.18—9.157.65alkalinity/mgL-1350—400380,TCOD、SCOD、NH+4-N、NO-3-N、NO-2-N、TN、PO3-4-P、pH、TP、、DO、1566　　　　　　　　　　　56　ORP、MLSS、MLVSS,.DO、ORP、pHWTW-pH/OXi340i.,.2.Table2　RuncyclesofexperimentsRuncycleScenarioⅠ/(0—40d)accumulationofPAOsⅡ/(40—80d)anoxicphosphorusuptakeⅢ/(80—106d)excessiveaeration2　2.1　A2O,,(PAO),,.2A2O、、.,,40,22.5%60%,2,4079.5%100%,95%,5.6～8.9mgL-1,0.30mgL-1.,,,,1.28,WarangkanaPunrattanasin[4].Fig.2　PremovalinA2Oprocess●influ.;▲anae.efflu.;*anox.efflu.;○sys.efflu.　3A2O.3,,Fig.3　RatioofPremovaltoanoxicPremoval　20%65%(40),,71.3%.,22.2mgL-1,8.2mgL-1.,,,DO,,,25%(DO,0.42m3h-10.32m3h-1),.,,,,.[5],20%～40%,,40%.4A2O.,6.7mgPgMLSS-1h-1,4.62mgP(gMLSS)-1h-1,2.08mgP(gMLSS)-1h-1,PHB,.,A2O,,PHB,DPB,PHB,,,,Mond,,1567　8　　:A2O,PHB,,,PHB,.,(),,0,,,.Fig.4　PreleaseandPuptakecharacteristicofsludge　2.2　5A2O、,,.,36.6～55.8mgL-1,45.44mgL-1;TN7.6～10.8mgL-1,9.2mgL-1;79.9%;1～2mgL-1,,Yuan[6],Yuan,1～3mgL-1,COD,,COD,..2.3　COD6Ⅰ～ⅡCOD,,COD,COD.,COD182～460mgL-1,342.8mgL-1;COD9.6～37.4mgL-1,26.5mgL-1;COD87.6%～97.35%,92.3%;,,CODFig.5　NremovalinA2Oprocess○influ.;■efflu.;▲PremovalFig.6　CODremovalinA2Oprocess■influ.;*anae.;●anox.;○efflu.;▲tot.CODremoval;△anae.CODremoval　PHB,COD47.4～118mgL-1,COD66.6%～85.8%,75.8%;COD9.5%,,COD,PHB“”,.2.4　,,,COD300mgL-17.32mgL-1.7,80～84DO,,,0.37mgL-15.7mgL-1,95%25.7%.,DO2～3mgL-1,,13,0.89mgL-1,1568　　　　　　　　　　　56　87.15%,.,,31.49mgL-1.Brdjanovic[7],,,,,,,DO,,PHB,PAO,PHB0,PAO,,,PAOPHB.,,,,PHB,,PHBNADH+,,.PHB,,,PAOPHB,,.Fig.7　EffectofexcessiveaerationonPremoval■influ.;▲efflu.;○DO;●anae.;△Premoval　,,,,,,,,:,,DO2～3mgL-1,PHB;,PHB,PHB,,.,,,DO(4～6mgL-1),DO,.3　　,A2/O,.(1)A2/O、,92.3%、79.5%95.5%,26.5mgL-1、9.2mgL-10.32mgL-1.,1.28.(2)A2/O,71.3%.,,“”,25%.(3),6.7mgP(gMLSS)-1h-1,4.62mgP(gMLSS)-1h-1,2.08mgP(gMLSS)-1h-1,PHB.(4),.References[1]　GerakdMStevens,JamesLBarnard,BarryRabinowitz.Optimizingbiologicalnutrientremovalinanoxiczones.WaterScience&Technology,1999,39(6):113—118[2]　BortoneG,SaltarelliR,AlonsoV,SormR,WannerJ,1569　8　　:A2OTilcheA.Biologicalanoxicphosphorusremoval-theDEPHANOXprocess.WaterScience&Technology,1996,34(1):119—128[3]　KubaT,VanLoosdrechtMCM,HeijnenJJ.PhosphorusandnitrogenremovalwithminimalCODrequirementbyintegrationofnitrificationinatwo-sludgesystem.WaterResearch.1996,30(7):1702