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3211201111ENVIRONMENTALSCIENCEVol．32No．11Nov．2011121*121.6100412.1000494L．COD、NH+4-N、、．0.5～3.5mm．CODNH+4-N4.80～12.6kg·m3·d－10.217～0.503kg·m3·d－1COD＞94%NH+4-N＞98%．CODNH+4-N15.70kg·m3·d－10.723kg·m3·d－14dNH+4-N81.6%．NH+4-N98%．CODNH+4-N．X703.1A0250-3301201111-3405-072011-01-202011-04-188632006AA06Z330KSCX2-YW-Z-10171985～E-mailzhyg6818@163．com*E-mailhuangjun@cib．ac．cnAerobicGranularSludgeforSimultaneousCODandNitrogenRemovalatHighCarbonandNitrogenLoadingRatesZHAOYong-gui12HUANGJun1YANGHua121.KeyLaboratoryofEnvironmentalandAppliedMicrobiologyEnvironmentalMicrobiologyKeyLaboratoryofSichuanProvinceChengduInstituteofBiologyChineseAcademyofSciencesChengdu610041China2.GraduateUniversityofChineseAcademyofSciencesBeijing100049ChinaAbstractIna4Lreactoraerobicgranularsludgewasculturedwithpiggerywastewaterwithglucoseandammoniumsulfateastheadditionalcarbonandnitrogensourcesrespectively．Noexoticactivatedsludgewasinoculatedandactivatedcarbonpowderwasusedtoimmobilizetheindigenousmicroorganismsofwastewaterintheset-upperiod．ThereactionwasconductedundercontrolledconditionsofprogressivelyincreasingCODandNH+4-Nloadingratesdecreasingsettlementtimeandenhancingaeration．TheresultedaerobicgranularsludgewascapableofsimultaneousCODandnitrogenremoval．TheperformanceCODandNH+4-Nremovalefficienciesandcharacteristicsofaerobicgranulesathighloadingrateswereinvestigated．Thematureaerobicgranularsludgewasbrown-yellowandtookanirregularsphericalshapewithadiameterof0.5-3.5mm．UndertheCODloadingratesof4.80-12.6kg·m3·d－1andNH+4-Nloadingratesof0.217-0.503kg·m3·d－1theremovalefficienciesofCODandNH+4-Nweregreaterthan94%and98%respectively．WhentheCODandNH+4-Nloadingratesreached15.7kg·m3·d－1and0.723kg·m3·d－1respectivelytheflocsludgegrewquicklyandthegranulesdisaggregated．TheremovalefficiencyofNH+4-Ndecreasedto81.6%infourdays．YettheremovalefficiencyofNH+4-Nreturnedtohigherthan98%whenthesludgewaspartiallyremovedandtheloadingrateswerereduced．TheaerobicgranulesculturedinthisstudyexhibitedexcellentabilitiesofsimultaneousCODandnitrogenremovalandresistancetosimultaneousshockofhighCODandNH+4-Nloadingrates．KeywordshighcarbonandnitrogenloadingratesaerobicgranularsludgesimultaneousCODandnitrogenremovalloadshockpiggerywastewater1997Morgenroth1sequencingbatchreactorSBR．、23、45C、N、P6．、78．、、、、、、910DOI:10.13227/j.hjkx.2011.11.045321112、、、12～14．、、、15．．C、N、．．26COD16NH+4-N17．12．．．11.18cm100cm80cm4L．460、50、40、30cm．210cm．ACO2012LZB26．．0.9mm1．20～50μm．1.21Table1CharacteristicsofpiggerywastewaterCOD/mg·L－1NH+4-N/mg·L－1NO2-N/mg·L－1NO－3-N/mg·L－1pH4100～5200470～580＜0.02＜2.07.0～8.52500～16000110～730＜0.02＜2.07.5～8.520g4L100L·h－120℃5d．30min3.5L．、、、．24h1.0min5.0～15.0min1.0min．2.5L62.5%．18d12h1.0min0.7～4.5min1.0min．2.0L50.0%．2．1.315000r·min－16minCentrifuge5804REppendorf．2COD、NH+4-N、NO2-N、NO－3-N21Table2Operationconditionsofthereactor/d1～56～1718～2324～4041～6162～65/h—2412121212/%—62.550.050.050.050.0/L·h－1100100100～200200200～24060COD/kg·m3·d－11.591.593.00～4.004.80～7.607.80～15.685.50NH+4-N/kg·m3·d－10.0740.074～0.0900.136～0.1430.217～0.2600.300～0.7230.240/min—15.0～5.04.5～2.52.5～1.01.0～0.70.7118.2～23.3pH7.5～8.5604311WTWTheSpectroquantAnalysisSystemPhotoLabS12．WTWCR2200．Merck．3pHEUTECHpHTester30．4SV40cm100mL30min．5100mL30min．6JEOLJSM25900LV．740D．22.14．31．3Table3Developmentprocessofaerobicgranularsludge/d1～56～1718～2324～40/mm＜0.50.5～2.51Fig．1Aerobicgranularsludgeinthedevelopmentprocessofaerobicgranularsludge1～5d．SV1.5%4.5%2．6～17d．．11d．5.0min2SV9%～13%2．17d．1218191812．．COD＞94%3aNH+4-N6～15d44.56%～56.82%15d52.58%18d94.77%3b．COD2DO＞5mg·L－1．NH+4-N．2、SVFig．2SettlementtimeSVandgranulationrateintheformationandgrowthofaerobicgranularsludge7043323CODNH+4-NFig．3EffluentconcentrationandremovalratesofCODandNH+4-Nintheformationandgrowthofaerobicgranularsludge18～23d．．4.5min2.5min2COD＞94%3aNH+4-N＞99%3b．23d1a0.5mm．COD1.5～15kg·m3·d－11.0～5.0min20．2.5～4.5minCOD3.00～4.00kg·m3·d－12．24～40d．1.0min2CODNH+4-N4.80～7.60kg·m3·d－10.217～0.260kg·m3·d－12CODNH+4-N4800～7600mg·L－1217～260mg·L－13．COD＞94%3aNH+4-N＞98%3b．SV2．55%31d76.19%40d0.5～2.5mm1b．4.4c．4Fig．4Scanningelectronphotomicrographsofgranularsludge2.2．41～61d．40～57dCODNH+4-N6.90kg·m3·d－10.260kg·m3·d－112.6kg·m3·d－10.503kg·m3·d－15a5bCODNH+4-N6900mg·L－1260mg·L－112600mg·L－1503mg·L－15c．COD＞96%NH+4-N＞99%．SV44d89.29%6．1.0min21.0～5.0min2122．58dCODNH+4-N15.68kg·m3·d－18043110.723kg·m3·d－1．4dNH+4-N81.59%SV1c0.5～3.5mm．．62～65d．61d2.5LCODNH+4-N5.50kg·m3·d－10.240kg·m3·d－1．65dNH+4-N98.94%COD94.49%5．．5、Fig．5Effluentconcentrationloadingratesandremovalratesinthestageofloadshockandloadrecovery6SVFig．6SVandgranulationrateinthestageofhighloadingrates2.37．14dNO2-NNO－3-N＜5.0mg·L－114～18dNH+4-N51.15%94.77%3bNO2-NNO－3-N14d2.10mg·L－11.0mg·L－118d50.00mg·L－113.2mg·L－1．NH+4-N．COD100～200mg·L－1NO2-NNO－3-N．COD/NH+4-NCOD/NH+4-N＞24NO2-NNO－3-N7．7NO2-N、NO－3-NCOD/NH+4-NFig．7RelationshipbetweenCOD/NH+4-NandaccumulationofNO2-NandNO－3-N18～42dCOD/NH+4-NSPSS13.0Bivariate4NO－2-NNO－3-NCOD/NH+4-N．COD/NH+4-N．4NO－2-N、NO－3-NCOD/NH+4-N1Table4CorrelationanalysisbetweenCOD/NH+4-NandaccumulationofNO－2-NandNO－3-NRPNO2-N－0.888＜0.001NO－3-N－0.882