A2O工艺中的反硝化除磷73f3defdbcd126fff6050b5e

2　6环境工程学报Vol.2,No.620086ChineseJournalofEnvironmentalEngineeringJun.2008A2/O彭　轶1　彭永臻1,2　吴昌永1(1.,150090;2.,100022)　　A2/O,,C/N。,,A2/O,C/N。,A2/O,A2/O、,。　A2/O　　　X703.1　　　A　　　1673-9108(2008)06-0752-05DenitrifyingphosphorusremovalinA2/OprocessPengYi1　PengYongzhen1,2　WuChangyong1(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090;2.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022)Abstract　Anaerobic-anoxic-oxic(A2/O)processisasimplewastewatertreatmentprocessthatcanachievebothnitrogenandphosphorusremoval.However,someinherentcontradictions,forexample,substancescompetitionandSRTproblems,makeitverydifficulttoraisethenutrientsremovalefficiencywhentreatinglowC/Nratiowastewater.Asanewdevelopedtechnology,denitrifyingphosphorusremovalcansolvethosecontra-dictionstoacertainextent,eventreatinglowC/Nratiowastewater.Theaimsofthisworkaretoexhibitthetech-niqueprincipleofdenitrifyingphosphorusremovalandthelatestresearchinA2/Oprocesswithdenitrifyingphos-phorusremoval.SomeoperationalstrategiesarealsoincludedtogiveatotalpresentationofA2/Oprocesswithdenitrifyingphosphorusremoval.ThemaindevelopmentaltrendsofdenitrifyingphosphorusremovalinA2/Oarealsodiscussedhere.Keywords　anaerobic-anoxic-oxic(A2/O)process;denitrifyingphosphorusremoval;controlstrategies:-(50628808);(D07050601500000);:2007-12-09;:2008-01-07:(1983～),,,:。E-mail:[e-mail]　　“”,BOD,SS。C/N,。,C/N。A2/O、、、、,。A2/O,、、,,、[1]。A2/O()、()、,C/N[2]。6　:A2/O“”,,A2/O。A2/O、A2/O、、A2/O。,A2/O,A2/O,A2/O,C/N。1　2080,Hascoet[3]、Gerber[4]Comeau[5],1993,DelftKuba[6]:/,,O2NO-3。,(PAO):PAOO2,PAOO2NO-3。(DNPAOs)[7]。,Saito[8]、[9]。,,PAONO-2。。,,,。。,,,,。DEPHAN-OX[10]A2NSBR。A2NSBRN/P,COD50%,30%,50%,100%[11]。。,DNPAOs,,//。Kuba[11],A2/O。,。2　A2/O2.1　,A2/O,A2/O(DNPAO),3:①NO-3-N;②(SRT),;③NO-3-N,。Vlekke[12]2,,,。Kuba[13],80%。A2/O,,NO-3-N。[12],,,,。,,。[14]52LA2/O,1,,1。1,,,,,,,21.3mg/L,69%7532。,,,。1　A2/OTable1　TechnologicalparametersofA2/OprocessindenitrifyingphosphorusremovalstartingstepQ(L/h)6.85r2～3R0.6T(℃)22±0.5F/M(kgCOD/kgMLSS·d)0.30±0.01HRT(h)1.4HRT(h)1.4HRT(h)4.2HRT(h)7HRT(h)4DO(mg/L)15SRT(d)152SVI(mL/g)2～2.51　Fig.1　CharacteristicsofTPremoval　　[15]A2/O1～3mg/L,3～3.5,A2/O,。,,400L/h320L/h,,。2.2　2.2.1　进水水质对于反硝化除磷的影响C/N、C/PA2/O。C/N、C/P。(1)C/NC/N,2:C/N,,COD,COD。PHB2,,PHB。。,,,。,C/N。,C/N,。C/N,,PHB。,PHB。C/N。A2/OC/N。(2)C/PC/P2:C/P,PHB,,PHB,;C/P,COD(SCOD),。SCOD,(GAOs),GAOs,DNPAOsPAOs,,7546　:A2/O[16]。,。[15]C/P32,A2/OC/P。C/P32,90%～98%,0.15mg/L,A2/OC/P32。PHB;C/P23～55,PHBC/P,PHB,,。2.2.2　内循环比对反硝化除磷的影响A2/O,。,NOx-N,,,。,,,,。,,,。,NOx-N,。,。,2　R/KTable2　VariationsaverageanoxicNO-3-NconcentrationsandKunderdifferentofRR(mg/L)/K01.2-40.96-32.75-38.891.50-22.31-7.98-12.3420-8.240.37-2.682.50.2819.356.428.1931.2348.9731.5438.923.52.268.2148.6263.8943.762.5850.1358.434.55.7147.9329.7633.26A2/O。　　[17]。8,RTN,TP。2。2,DNPAOs;,,,。1～3mg/L,3～3.5,,,。2.2.3　体积比对反硝化除磷的影响A2/O,A2/O。Terrence[18]。,;,,。[15]A2/O,,C/NC/P,,TN、TP、/K。,。,1∶1∶2,C/NC/P645。2.3　A2/O。,,。。。Meinhold[19],(4mg/L),,,,;7552(8mg/L),,。,。,,,、。,。3　A2/O,COD/TN(COD/TN6),,。A2/O,,C/N。,A2/O,A2/O。[1],,..,2003,16(3):40～42[2],.A2/O.,2003,29(3):22～26[3]HascoetM.C.,FlorentzM.Infuenceofnitratesonbiologi-calphosphorusremovalnutrientwastewater.Wat.SA.1985,11(1):23～26[4]GerberA.,VilliersR.H.,MostertE.S.,etal.ThePhe-nomenonofSimultaneousPhosphateUptakeandReleaseanditsImportanceinBiologicalNutrientRemoval:Biologi-calPhosphateRemovalfromWastewaters.PergamonPress,Oxford,1987.123～134[5]ComeauY.,OldhamW.K.,HallK.J.Dynamicsofcar-bonreservesinbiologicaldephosphatationofwastewater.In:BiologicalPhosphateRemovalfromWastewaters.Per-gamonPress.Oxford,1987.39～55[6]KubaT.,VanLoosdrechtM.C.M.Phosphorusremovalfromwastewaterbyanaerobic/anoxicsequencingbatchre-actor.Wat.Sci.Tech.,1993,27(5～6):241～252[7]VlekkeG.J.F.M.,ComeauY.,OldhamW.K.Biologicalphosphateremovalfromwastewaterwithoxygenornitrateinsequencingbatchreactors.EnvironmentalTechnologyLet-ters,1988,9:791～796[8]SaitoT.,BrdjanovicD.,VanLoosdrechtM.C.M.Effectofnitriteonphosphateuptakebyphosphateaccumulatingorganisms.Wat.Res.,2004,38(14):3760～3768[9],,,..,2005,25(5):515～518[10]BortoneG.,MarsiliLibelliS.,TilcheA.,etal.Anoxicphosphateuptakeinthedephanoxprocess.Wat.Sci.Tech.,1999,40(4～5):177～185[11]KubaT.,vanLoosdrechtM.C.M.,HeijnenJ.J.Phoso-phorusandnitrogenremovalwithminimalCODrequire-mentbyintegrationofdenitrifyingdephosphatationandni-trificationinatwo-sludgesystem.Wat.Res.,1996,30(7):1702～1710[12]VlekkeG.J.F.M.,ComeauY.,OldhamW.K.Biologi-calphosphorusremovalformwastewaterwithoxygenandni-trateinsequencingbatchreactor.Envioron.Technol.Lett.,1988;9:791～796[13]KubaT.,SmoldersG.J.F.,vanLoosdrechtM.C.M.,etal.Biologicalphosphorusremovalfromwastewaterby-anaerobic-aerobicsequencingbatchreactor.Wat.Sci.Tech.,1993;27(5/6):241～252[14].A2/O[].,2007.16～25[15],,.C/PA2/O.,2005,56(9):1765～1770[16],,..,2006,29(1):102～104[17],,.A2/O.,2006,26(5):722～727[18]TerrenceM.C.,RahulN.,MauricioZ.,etal.Changesinanoxicdenitrificationrateresultingfromprefermenta-tioinofasepticphosphor