UASB_生物膜反应器厌氧氨氧化反应的启动研究_英文_周少奇

№.4陕西科技大学学报Aug.200650JOURNALOFSHAANXIUNIVERSITYOFSCIENCE&TECHNOLOGYVol.24*文章编号:1000-5811(2006)04-0050-05START-UPANAEROBICAMMONIUMOXIDATION(ANAMMOX)PROCESSINUASB-BIOFILMREACTORZHOUShao-qi,YAOJun-qin(CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou510640,China)Abstract:Thestart-upofANAMMOXprocesswasinvestigatedbyusinga3.2LUASB-bio-filmreactorinoculatedwithactivatedsludgefromalandfillleachatetreatmentsystem.TheUASB-biofilmreactorwasfeedwithartificialwastewatercomposedwithammoniumandni-triteatproperNH+4-N,NO-2-Nratio.TheresultsdemonstratedthatANAMMOXprocesswasachievedsuccessfullywithhighremovalefficienciesofNH+4-N,NO-2-NandTN(99.4%,97.4%and90.0%)after56daysofoperationandacclimation.Theratioofre-movedammonia,nitriteandproducednitratewas1∶1.61∶0.25atthestablestageoftheprocess.TheeffluentpHvaluekeptaround8.3andthealkalinityvariedalittle.Theob-tainedbiofilmwithhighANAMMOXactivitywasbrown.Thegrain-sludgeofbrownandpinkwerefoundatthebottomofthereactor.Keywords:ANAMMOX;UASB-biofilmreactor;landfillleachate;start-upCLCNumber:X703DocumentCode:A0IntroductionANAMMOXhasbeendiscoveredbyMulderA.etalinadenitrifyingfluidizedbed-reactoronday420whenlargequantitiesofammoniumwereobservedtodisappearandnitrateconsumptionsimultane-ouslyelevated[1].Andthenitritehasbeenfoundtobethepreferredelectronacceptorfortheprocess[2].TheelectronicstoichiometricanalysesdemonstratethatANAMMOXprocesshasalotofadvantagescomparedwithtraditionalnitrificationanddenitrificationfornitrogenremoval[3,4].Owningtoremovingammoniumandnitrite,twokindsofpollutionswithoutconsumingorganicsubstance,ANAMMOXprocessisanewandpromisingalternationtotheconventionalmicrobialnitrogenremoval,whichbasedonautotrophicnitrificationandheterotrophicdenitrification.However,ANAMMOXprocessorANA-MMOXbacteriaiswidelyfoundtoexistinoxic/anoxicinterfaceecosystem,suchasdry/wetinterfaceofsoil[5],theanaerobiczoneattheseabottom[6]orcoastalbayatdepthof200m[7].ANAMMOXbacteriahavealsobeendetectedinwastewatertreatmentsyste