NH4+SBRN2O,,,,,,(,225127)[]NH4+SBRN2O,PCR-DGGE。,NH4+,,N2O-N,N2O-N0.25%~6.35%;,N2OSBR,,N2O;NH4+。N2O,。[]SBR;;;N2O[]X703[]A[]1005-829X(2011)11-0019-04StudyonnitrousemissionfromaSBRwastewatertreatmentsystemunderdifferentNH4+concentrationPiaoZhe,JingLei,LiYumin,MaShuai,ChenDeying,HeChengda,YinShixue(CollegeofEnvironmentalScienceandEngineering,YangzhouUniversity,Yangzhou225127,China)Abstract:N2OemissionsinSBRdenitrificationprocesshavebeenstudiedunderdifferentNH4+concentrations,andPCR-DGGEhasbeenusedforanalyzingthecharacteristicsofmicrobialcommunities.TheresultsshowthatwiththeincreaseofNH4+concentrations,theefficiencyofnitrogentransformationratedecreasesinthisSBRsystem.Meantime,theN2O-Nproportionindenitrificationincreasesremarkably.Undertheexperimentalconditions,theproportionsofN2O-Nindenitrificationarerangedfrom0.25%to6.35%.Whenthenitrogentransformationgoesfavorably,N2OemissionperiodmainlyoccursinSNDduringaerobicnitrificationsectioninSBR.Whenthenitrogentransformationisinhibited,therearealargenumberofN2Oemissionsinaerobicnitrificationsectionandanoxinnitrificationsection.AndthemicrobialcommunitieshaveacorrespondingchangesunderdifferentconcentrationsofNH4+.TheresultsindicatethatN2Oemissioninwastewaterdenitrificationisaffectedbynotonlythenitrogenconversionefficiencybutalsothechangesinmicrobialcommunitystructures.Keywords:sequencingbatchreactorsystem;nitrogentransformation;microbialcommunity;N2OemissionN2O,CO2200~300。,N2O0.3×1012~3.0×1012kg,N2O2.5%~25%〔1〕。,N2O。N2O,,N2O。,(、)N2O〔2-3〕。N2O,N2O,。N2O。,N2O,pH、DO、C/N、、N2O〔4-5〕。,[](22677047);(2008ZX07317-007-1)3111201111IndustrialWaterTreatmentVol.31No.11Nov.,201119N2O。NH4+N2O,N2O。11.1260mm、360mmSBR,15L。,,。1.2。,、(NH4)2SO4、NaHCO3、NaCl、CaCl2、KH2PO4、MgSO4·7H2O。pH7,pH。1.32000mg/LSBR,,25~28℃。SBR0.5h、5h、2h、1h,1~2。2.5L/min。,NH4+40mg/L,COD400mg/L,COD200mg/L。40d,4000mg/L,COD95%,。,NH4+20、40、60mg/L,N2O。。1.4N2OSBR,;,。N2O(ECD)。:40℃、60℃、330℃,PorapakQ,。,N2O(5.27μmol/mol)。1.5COD、NH4+-N、NO3--N、NO2--N〔6〕。1.6PCR-DGGE(PolymeraseChainReac-tion-DenaturingGradientGelElectrophoreses),NH4+-N。、DNA〔7〕。P2(5’-ATTACCGCGGCTGCT-GG-3’)P3(5’-CGCCCGCCGCGCGCGGCGGG-GGGGGGGGCACGGGGGGCCTACGGGAGGCAGCG-Ag-3’)DNA16SrDNAV3,PC〔8〕。35%~60%,DNA200ng。200V,1×TAE240min。,0.5mg/L,UVI。BIO-RADQUANTITYONE4.0。22.1N2ONH4+SBR1。11,NH4+20、40mg/L,,37;NH4+60mg/L,75%。SBRN2O2。2,NH4+SBRN2O。,NH4+20、40、60mg/L,N2O1.16、17.33、89.85mg。2011-11,31(11)202N2O,SBRNH4+N2O-N。NH4+20mg/L,2NH4+(3),N2O-N0.25%;NH4+40mg/L,NH4+3,20mg/L,NH4+1h,N2O-N1.84%;NH4+60mg/L,NH4+,SBRN2O(2),N2O-N6.35%。,NH4+,N2O-N25。3NH4+2.2N2O,SBR,NH4+(1、3),(SND)。,SBR、,N2O(2)。,NH4+20、40mg/L,0~2h0~3h(1、3),N2ON2O95%。(3),NH4+60mg/L,N2O,N2O(2)。2.3PCR-DGGE,NH4+,4。12、34、56NH4+20、40、60mg/L。4PCR-DGGE4,(OTU),,。,NH4+,a~dNH4+20、40mg/L,NH4+60mg/L,;ehNH4+60mg/L;f、giNH4+。,NH4+,。BIO-RADQUANTITYONE4.0,PCR-DGGEUPGMA,5。12、34、56NH4+20、40、60mg/L。(Cs):Cs=2j/(a+b):a、b———DGGE2;、j———。Cs,。:(1)NH4+,2011-11,31(11),:NH4+SBRN2O210.9,SBR(),;(2)NH4+,NH4+20mg/L40mg/L,SBR0.87,NH4+60mg/L,2NH4+(20、40mg/L),0.58,NH4+20、40mg/L,NH4+60mg/L,。5PCR-DGGE,NH4+20mg/L40mg/L,SBR(Cs0.87),N2O;NH4+60mg/L,(Cs0.58),N2O,。,,,N2O。3(1)NH4+,SBRN2O-N。,NH4+,N2O-N0.25%~6.35%。(2)SBR,,N2O,,N2O。(3)NH4+,SBR。NH4+,SBR。[][1]KhalilMAK,RasmussenRA,ShearerMJ.Atmosphericnitrousoxide:Patternsofglobalchangeduringrecentdecadesandcenturies[J].Chemosphere,2002,47(8):807-821.[2]TakayaN,Catalan-SakaairiMAB,SakaguchiY,etal.Aerobicdenitrifyingbacteriathatproducelowlevelsofnitrousoxide[J].AppliedandEnvironmentalMicrobiology,2003,69(6):3152-3157.[3],,,.N2O-[J].,2010,23(4):515-520.[4],,,.N2O[J].,2006,26(12):1940-1946.[5],,.N2O[J].:,2001,31(1):95-99.[6].[M].:,1989:246-286.[7],.DNA[J].,2002,22(11):2015-2019.[8]PiaoZhe,YangLinzhang,ZhaoLiping,etal.Actinobacterialcom-munitystructureinsoilsreceivinglong-termorganicandinorganicamendments[J].Appl.Environ.Microbiol.,2008,74(2):526-530.[](1968—),2001,,,,。:13773504033,E-mail:piaozhe@yzu.edu.cn。[]2011-08-16()!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!··:,,。,,。:、、,,、、、、、、、30,。、、、,。()2011-11,31(11)22