高氨浓度下生物流化床内亚硝化过程的选择特性研究王志盈

32　120003西安建筑科技大学学报J.Xi’anUniv.ofArch.&Tech.Vol.32　No.1Mar.2000王志盈,刘超翔,彭党聪,袁林江(,710055)　:,——.,,.:,,,,.,,,,.:下向流内循环生物流化床;硝化;亚硝酸积累;废水生物脱氮:X52　　　　:A　　　　:1006-7930(2000)01-0001-03　　StudyontheselectionprocessofnitrificationinbiologicalfluidizedbedunderhighconcentrationofammoniaWANGZhi-ying,LIUChao-xiang,PENGDang-cong,YUANLin-jiang(SchoolofEnvir.&Civic.Eng.,Xi'anUniv.ofArch.andTech.,Xi'an710055,China)Abstract:Shortcutnitrification-denitrificationisanattractivewayfortreatmentofwastewatersufficientinnitrogenanddeficientinorganiccarbon.Adownflowbiologicalfluidizedbedreactor(DBFB)wasusedtodiscussthestabilityofnitrificationthroughnitriteunderhighconcentrationofammonia.Theexperimentresultsshowedthatatthebeginningofoperation,nitriteaccumulationoccurredduetoadaptationtoenvironmentandgrowthlagofnitrobacteria.Butafterthebacteriaaccumulationandproliferation,nitritewasmostlyoxidizedtonitrate.ThathighconcentrationofammoniainhibitedoxidizerateofnitrobacteriamorethanthatofnitrosomonasresultedinnitriteaccumulationthatwasnotstablebecauseoftheaccumulationofthenitrobacteriatoFAandtheinhibitionwasirreversibleafteraccumulationtonitrobacteria.Keywords:downflowbiologicalfluidizedbed;nitrification;nitriteaccumulation;biologicalnitrogenremoval,,.、..、.,1.1——:1999-09-05:(59878042):(1942-),,,.DOI:10.15986/j.1006-7930.2000.01.001图1　生物硝化——反硝化途径示意图,,(NO-3),(NO-2).NO-2NO-3,NO-3NO-2.,,NO-2NO-3,NO-2,——.,——:1.,25%,;2.,NO-2→N2NO-3→N240%;3.,,NH+4NO-2NO-2NO-3,,;4.,0.04～0.13gVSS/gN0.02～0.07gVSS/gN,NO-2NO-30.345gVSS/gN0.765gVSS/gN,——24%～33%,50%.——、、、[1].——,.,[2].,——图2　试验装置1.　2.　3.4.　5.　6.7.　8.　9.10.　11.,、.1　研究方法1.1　,2.,、1m,83mm,96cm,、2.96.6cm.Perlita,1.1mm.1.2　,NH4Cl、NaH2PO4、Na2CO3,N∶P(10～20)∶1,7～8gNa2CO3/gNH+4-N.1.3　,;,N-1--;,;,.2　结果与讨论2.1,、3.,NO-x-N78%～80%(95%),,,[2](_m=0.28～1.44d-1,_m=0.46～2.2d-1),,,.,,,.17150mg/L,120mg/L,15%.,2　　　　　　　　　　　　　　　　　　　　　32图3　进水浓度对出水的影响,,,NH+4→NO-3.2.2(180mg/L→300mg/L),4Ⅰ.,200mg/L,.,.300mg/L,150mg/L,56%.图4　高浓度氨对亚硝氮积累的影响,.,.[3],0.1～1.0mg/L,10～150mg/L.,,.,,,,.300mg/L(pH=7.5,t=25℃),4.5mg/L,,　　图5　系统中氨氮和亚硝氮氧化速率随进水浓度的变化.5,(200mg/L),,,,,.,.4Ⅱ.,.,,,.300mg/L,10%,56%,.Ahthonisen[4],,[5,6],,(),,.(下转第7页)31　　　　　　　　　　:.,75%94%,,,.3　结论(1)300mg/L,0.5～1.0mg/L,30d,80%,90%.,.(2),,.(3),3,2/5.,,.:[1]　.[M].:,1993.[2]　GARRIDOJM,etal.Influenceofdissolvedoxygenconcentrationonnitriteaccumulationinabiofilmairliftsuspensionreactor[J].Biotech&Bioeng,1997,53:168-179.[3]　HANAKIK,etal.Nitrificationatlowlevelsofdissolvedoxygenwithandwithoutorganicloadinginasuspended-growthreactor[J].WaterRes,1990,24:379-402.[4]　LAANBROEKHJ,etal.CompetitionforlimitingamountsofoxygenbetweenNitrosomonaseuropaeaandNitrobacteriawinogradskyigrowninmixedcontinuouscultured[J].ArchMicrobiology,1993,159:453-459.(上接第3页)3　结论(1),,,,.(2),,,,.(3),,.:[1]　VOETJP,etal.Removalofnitrogenfromhighlynitrogenouswastewater[J].JWPCF,1975,47:394-398.[2]　.[R].:,1996.[3]　ALLEMANJE.Elevatednitriteaccurencinbiologicalwastewatertreatmentsystem[J].WaterSciTech,1984,17:409-419.[4]　SUTHERSONS,etal.Inhibitionofnitriteoxidationduringnitrification:someobservations[J].WaterPollutResJCan,1986,21:257-266.[5]　TURKO,MAVINICDC.Maintainingnitritebuild-upinasystemacclimatedtofreeammonia[J].WaterRes,1989,23(22):1383-1388.[6]　ANTHONISENAC,etal.Inhibitionofnitrificationbyammoniaandnitrousacid[J].JWPCF,1976,48:835-850.71　　　　　　　　　: