低浓度Ce3对厌氧颗粒污泥比产甲烷活性和胞外多聚物的影响

256200611ENVIRONMENTALCHEMISTRYVo.l25,No.6November20062006120.*(BE2005011).**:hqren@njueducnCe3+*夏青1丁丽丽2任洪强1**吴吉春2关梅3(1,;2;3,,210093),Ce3+.,Ce3+;005mgl-1Ce3+,1429%,,5%,,767%164%;.Ce3+,.Ce3+,,.Ce3+,,,.,,,.,,,,[1]..(SpecificMethanogenicActivity,SMA)..,Ce3+,,.111UASB.,13mm,SSVSS7721gl-15153gl-1.UASB(18L)35.1.1Table1Parametersofanaerobicgranularsludgeindifferentrunstate/mgl-1d-1pHSS/gl-1VSS/gl-1700750707276085094150020006871755251512000300060656648468230003500526064034647100015006871514335656:Ce3+71912(mgl-1):5000,NH4Cl170,KH2PO437,CaCl22H2O8,MgSO44H2O9.[2]1mll-1.Ce3+:0155gCe(NO3)36H2O,100m,l200,25mgl-1Ce3+,,50ml1mlCe3+.20ml125ml,50ml(2500mgl-1)25mgl-1Ce3+1m,lpH70,,35,Ce3+,005mgl-1Ce3+,,,SSVSS.13:,COD:,:,:,:,SS/VSS:.221Ce3+,Ce3+,005mgl-1Ce3+,2.2,005mgl-1Ce3+SMA,SMA1429%,(),.Ce3+SMA(24h),005mgl-1Ce3+,.2Ce3+Table2EffectsofCe3+ontheSMAandbiogasproductionofdifferentstateanaerobicgranularsludge/mlCH4g-1VSSd-124h/mlCe3+/%Ce3+/%53964982-767222522450901104512624142927152770203137961408821127002665-13072787575408234523801491091010731-16424402303-56122Ce3+,[3].,,[4],,,,;,,[5],.,,.Ce3+,(24h).005mgl-1Ce3+1.1,,72025,,,,.,.,,,,,.1,Ce3+(76%143%),33%.,,,.Ce3+,,.,,[6],Ca2+,Mg2+,Fe2+,[7,8].Ce3+,().23Ce3+,,,,,.2005mgl-1Ce3+.2,Ce3+,7%,744%415%..,,,,ECP,DNA[9].,,DNA,.,,,,DNA.3Ce3+.005mgl-1Ce3+,1429%.6:Ce3+721,.,,,.Ce3+,,.Ce3+,.Ce3+,.[1],,,,1994,14(4)439444[2],.:,1998,536543[3],,,,1997,15(4)264270[4]SaninLS,SaninFD,BryersJD,EffectofStarvationontheAdhesivePropertiesofXenobioticDegradingBacteriaProcessBiochemistry,2003,38(6)909914[5]AzeredoJ,VisserJ,OliveiraR,ExoplymersinBacterialAdhesion:InterpretationinTermsofDLVOandXDLVOTheoriesColloidsandSurfaceB:Biointerfaces,1999,14(14)141148[6],,1994,12(4)358365[7],,1999,20(1)6468[8],,,,2003,22(1)7579[9],,,EPS,2004,24(4)613618EFFECTOFLOWCONCENTRATIONSOFCERIUM()ONTHESPECIFICMETHANOGENICACTIVITYANDEXTRACELLARPOLYSACCARIDESOFANAEROBICGRANULARSLUDGEXIAQing1DINGLili2RENHongqiang1WUJichun2GUANMei3(1StateKeyLaboratoryofPollutionControlandResourceReuse,SchoolofEnvironment;2DepartmentofEarthSciences;3DepartmentofBiologicalScienceandTechnology,NanjingUniversity,Nanjing,210093,China)ABSTRACTBatchexperimentswereconductedtostudytheeffectoflowconcentrationofCe3+ontheactivityofanaerobicgranularsludgeinthestateofstartup,stabilization,acidificationandrestartupbydeterminingitsspecificmethanogenicactivity(SMA),extracellarpolysaccharidesandnucleicacidscontentResultsshowedthatlowconcentrationofCe3+couldstimulatetheSMAofanaerobicgranularsludgeTheeffectsof005mgl-1Ce3+onsludgeindifferentstatesweredifferen:tthemaximumincreaseof1429%wasfoundinthestabilizationstate;thestimulationtoacidifiedsludgewasweaker,whichwasunder5%;inthestartupandrestartup,theSMAwasinhibitedby767%and164%respectivelyAcclimationandincubationofsludgefavoreditsaccommodationtotherareearthelementsCe3+decreasedtheextracellarpolysaccharidescontentofsludgeinthestateofstartup,stabilization,severeacidificationandrestartup,whichwasbenefitforstabilityofgranularsludgeCe3+decreasedtheextracellarnucleicacidscontentofsludgeinthestateofstartup,stabilizationandrestartup,butincreasedthatofacidifiedsludge;thiscouldbeexplainedbythealterationofmembranepermeabilityKeywords:Ce3+,anaerobicgranularsludge,methanogenicactivity,extracellarpolymer