Biodiversity of N-cycle bacteria in nitrogen remov

Biodiversity of N-cycle bacteria in nitrogen removing moving bed biofilters forBiodiversityofN-cyclebacteriainnitrogenremovingmovingbedbiofiltersforfreshwaterrecirculatingaquaculturesystemsMaartjeA.H.J.vanKessela,b,HarryR.Harhangia,KatinkavandePas-Schoonena,JackvandeVossenbergc,GertFlikb,MikeS.M.Jettena,PeterH.M.Klarenb,HuubJ.M.OpdenCampa,⁎aDepartmentofMicrobiology,IWWR,RadboudUniversityNijmegen,Heyendaalseweg135,NL-6525AJNijmegen,theNetherlandsbDepartmentofOrganismalAnimalPhysiology,IWWR,RadboudUniversityNijmegen,Heyendaalseweg135,NL-6525AJNijmegen,theNetherlandscKWRWatercycleResearchInstitute,Groningenhaven7,NL-3433PENieuwegein,TheNetherlandsabstractarticleinfoArticlehistory:Received12January2010Receivedinrevisedform19May2010Accepted19May2010Keywords:N-cyclebacteriaMovingbedbiofilmreactorFreshwateraquaculturesystemNitrificationDenitrificationAnammoxMaintenanceofoptimalwaterqualityandremovalofnitrogencompoundsposechallengestoaquacultureworldwide.Presenceandactivityofdifferentbacteriai