Enrichment-and-screening-of-nitrifying-bacteria-and-application-in-a-biotrickling-filter

Enrichment-and-screening-of-nitrifying-bacteria-and-application-in-a-biotrickling-filterEnrichmentandscreeningofnitrifyingbacteriaandapplicationinabiotricklingfilterXueNiantao,WangQunhui*,WuChuanfu,LiChenSunXiaohongSchoolofCivilandEnvironmentalEngineeringBeijingAgriculturalBiotechnologyCentreUniversityofScienceandTechnologyBeijingBeijingAcademyofAgricultureandForestrySciencesChinaBeijing100083,ChinaBeijing100089,China*Correspondingauthor,wangqh59@sina.comAbstract--Nitrifyingbacteria,comprisingammonia-oxidizingbacteria(AOB)andnitrite-oxidizingbacteria(NOB),wereenrichedandscreenedfromactivatedsludgeandcattlemanure.RemovalefficiencyofNH3inexhaustcompostinggasesbyabiotricklingfilter(BTF)whichwasnon-inoculatedandinoculatedwiththenitrifyingbacteriawascompared.TheresultsshowsthatthenitrifyingbacteriacontinuouslyoxidizedNH4+toNO3-,whichdecreasedtheNH3vaporpressureoutsidethebiofilmandbenefitedNH3shiftfromthegasphasetotheliquidphase.Whenthebiofilmwasinoculatedwiththenitrifyingbacteria,NH3removal