微生物英文文献及翻译—原文Dynamicanddistributionofammonia-oxidizingbacteriacommunitiesduringsludgegranulationinananaerobiceaerobicsequencingbatchreactorZhangBina,b,ChenZhea,b,QiuZhiganga,b,JinMina,b,ChenZhiqianga,b,ChenZhaolia,b,LiJunwena,b,WangXuanc,*,WangJingfenga,b,**aInstituteofHygieneandEnvironmentalMedicine,AcademyofMilitaryMedicalSciences,Tianjin300050,PRChinabTianjinKeyLaboratoryofRiskAssessmentandControlforEnvironmentandFoodSafety,Tianjin300050,PRChinacTianjinKeyLaboratoryofHollowFiberMembraneMaterialandMembraneProcess,InstituteofBiologicalandChemicalEngineering,TianjinPolytechnicalUniversity,Tianjin300160,PRChinaarticleinfoArticlehistory:Received30June2022Receivedinrevisedform10September2022Accepted10September2022AvailableonlinexxxKeywords:Ammonia-oxidizingbacteriaGranularsludgeCommunitydevelopmentGranulesizeNitrifyingbacteriadistributionPhylogeneticdiversityabstractThestructuredynamicofammonia-oxidizingbacteria(AOB)communityandthedistributionofAOBandnitrite-oxidizingbacteria(NOB)ingranularsludgefromananaerobiceaerobicsequencingbatchreactor(SBR)wereinvestigated.Acombinationofprocessstudies,molecularbiotechniquesandmicroscaletechniqueswereemployedtoidentifyandcharacterizetheseorganisms.TheAOBcommunitystructureingranuleswassubstantiallydifferentfromthatoftheinitialpatternoftheinoculantssludge.Alongwithgranulesformation,theAOBdiversitydeclinedduetotheselectionpressureimposedbyprocessconditions.Denaturinggradientgelelectrophoresis(DGGE)andsequencingresultsdemonstratedthatmostofNitrosomonasintheinoculatingsludgewereremainedbecauseoftheirabilitytorapidlyadapttothesettlingewashingoutaction.Furthermore,DGGEanalysisrevealedthatlargergranulesbene?tmoreAOBspeciessurvivinginthereactor.IntheSBRwerevarioussizegranulescoexisted,granulediameteraffectedthedistributionrangeofAOBandNOB.Smallandmediumgranules(d0.9mm)canresultinsmalleraerobicvolumefractionandinhibitionofNOBgrowth.AlltheseobservationsprovidesupporttofuturestudiesonthemechanismsresponsiblefortheAOBingranulessystems.a2022ElsevierLtd.Allrightsreserved.1.IntroductionAtsuf?cientlyhighlevels,ammoniainaquaticenvironmentscanbetoxictoaquaticlifeandcancontributetoeutrophica-tion.Accordingly,biodegradationandeliminationofammoniainwastewateraretheprimaryfunctionsofthewastewatertreatmentprocess.Nitri?cation,theconversionofammoniatonitratevianitrite,isanimportantwaytoremoveammonianitrogen.Itisatwo-stepprocesscatalyzedbyammonia-oxidizingandnitrite-oxidizingbacteria(AOBandNOB).Aerobicammonia-oxidationisoftenthe?rst,rate-limitingstepofnitri?cation;however,itisessentialforthe*Correspondingauthor.**Correspondingauthor.InstituteofHygieneandEnvironmentalMedicine,AcademyofMilitaryMedicalSciences,Tianjin300050,PRChina.Tel.:+8622846554101;fax:+862223328809.E-mailaddresses:wangxuan0116@https://www.sodocs.net/doc/b217340359.html(W.Xuan),jingfengwang@https://www.sodocs.net/doc/b217340359.html(W.Jingfeng).Availableonlineathttps://www.sodocs.net/doc/b217340359.htmljournalhomepage:https://www.sodocs.net/doc/b217340359.html/locate/watreswaterresearchxxx(2022)1e100043-1354/$eseefrontmattera2022ElsevierLtd.Allrightsreserved.doi:10.1016/j.watres.2022.09.026本文来源：网络收集与整理，如有侵权，请联系作者删除，谢谢！