低DO含量MBR工艺的脱氮及运行特性研究曹占平

DO、、[1-7]。DOTN[8]。DO0.5mg·L-1[9]DO0.5～1.0mg·L-1COD[10]。DOTN[11-12]。DO。DODODO。DODOMBR。DOMBRCOD、TNDO。11.1MBR1。MBR100LDOMBR121.3001602.300384MBRDO。DO0.8～1.2、0.2～0.5、0.5～0.8mg·L-13CODDOTN。DO0.8～1.2mg·L-190%TN70%DO0.2～0.5mg·L-1TN50%DO0.5～0.8mg·L-1TN85%。DOSVI、。MBRX703.1TQ028.8A1000-3770(2010)11-0[e-mail]1Fig.1Schematicdiagramoftheexperimentprocess3611201011TECHNOLOGYOFWATERTREATMENTVol.36No.11Nov.,2010123DOI:10.16796/j.cnki.1000-3770.2010.11.032PVDF0.2μm1.0m2。HRT6h、pH7±1、(20±5)℃。、8、2minPLCDO0.8～1.2、0.2～0.5、0.5～0.8mg·L-13。1.21。1.3CODDOYSIMODEL58DOMODEL5739TNNO3--NNO2--NN-1-MLSSOLYMPUS/BX52[13]。1.4MBR。TSSVSS39.87、15.6g·L-1m(VSS)/m(TSS)0.391pH6.94。3.5g·L-1DOl.5～2.0mg·L-110d4.0g·L-12。22.1DOCOD2.1.12DOMBR。23CODHRT6h。2DO0.8～1.2mg·L-1CODCOD1.5hDO0.5～0.8mg·L-14hCODDO0.2～0.5mg·L-16h。DOCOD。2.1.2MBRHRT6h3COD3。3MBRCODCOD60mg·L-1。MBRCOD180～300mg·L-1240mg·L-1MBRCOD52mg·L-1。2.2DO2.2.1DO30～63mg·L-1MBR4。180%90%NH4+-NTNSS1Tab.1QualityofexperimentalwastewaterCOD/mg·L-1ρ/mg·L-1/pH385～147。63.2～31.366.8～38.5400～20395.51007.1～8.11230.8～1.20.2～0.50.5～0.860106010602Tab.2Operationmodesofexperiment/dρ(DO)/mg·L-12CODFig.2EfficenciesofCODremovalunderdifferentDO
0100200300400500050100150200250COD/mgL
/min
3DOCODFig.3CODremovalperformanceunderdifficultDO
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COD/mgL/d 
36111242～6mg·L-1DO90％。260d50%。DO0.5mg·L-1。DO0.5～0.7mg·L-1[14-15]。3120d125d85%～90%。。DO。2.2.2TNTN38～66mg·L-1lmg·L-1。DOTNMBRTNTN5。51TN70%DO0.8～1.2mg·L-1MBRDOTN8.518.4mg·L-1。2DO。AOBDOK(O2)0.74mg·L-1[16]。DOTN。TN50%。3TNTN85%TN10mg·L-1。DO0.5～0.8mg·L-1TN。DO0.5～0.8mg·L-1NOBDOK(O2)1.74mg·L-1DODO[16]。MBR。DODO。DO。DO。DOTN。2.3DODO6。61SVI150～200mL·g-1。2DO4DOFig.4AmmoniaremovalunderdifferentDO
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NH-N/mgL/d/% 5TNFig.5Totalnitrogenininfluentandeffluentremovalandchangeofitsremovalefficiencies
0306090120150180020406080020406080100
/mgL
/d /% 6DOSVIFig.6EffectofreducingDOonSVI030609012015018001002003004000.000.250.500.751.001.251.50


/d
DO/mgLSVI/mLgDOMBR125SVI10dSVI300mL·g-1SVI350mL·g-1。310dSVI250mL·g-1SVI250mL·g-1DOMBRDO0.5～0.8mg·L-1。MLSS4.0～5.5g·L-1。SVI。1SVI＜200mL·g-17a。SVI＞300mL·g-1、7b。SVI50～150mL·g-1SVI250mL·g-17c[17]。2.4MBR。。。40kPaMBR。SVISVISVIΔp/t3。SVI＜200mL·g-150～55dSVI250mL·g-135～38dSVI300～350mL·g-130d。SVI。SVISVI、。SVI300mL·g-1[18]、、。3DO0.8～1.2、0.2～0.5、0.5～0.8mg·L-1COD240mg·L-1COD52mg·L-1。DOCOD。DO0.8～1.2mg·L-190%TN70%DO0.2～0.5mg·L-1TN50%DO0.5～0.8mg·L-185%～90%TN85%。MBRDO0.5～0.8mg·L-1SVI250mL·g-1DO0.5mg·L-1。。[1]YuanXJ,GaoDW.Effectofdissolvedoxygenonnitrogenremovalandprocesscontrolinaerobicgranularsludgereactor[J].JournalofHazardousMaterials,2010,178(1/3):1041-1045.[2]TanTW,NgHY.Influenceofmixedliquorrecycleratioanddissolvedoxygenonperformanceofpre-denitrificationsubmergedmembranebioreactors[J].WaterResearch,2008,42(4/5):1122-1132.[3],,,.[J].,2006,l6(l0):1067-1072.[4]WaltersE,HilleA,HeM,etal.Simultaneousnitrification/denitrificationinabiofilmairliftsuspension(BAS)reactorwithbiodegradablecarriermaterial[J].WaterResearch,2009,43(18):(a)(b)(c)7500×Fig.7Photoofmicroorganismsinslude150.5187.0248.50.850.911.12254.3331.0348.01.061.261.323SVITab.3Increaseoftrans-membraneindifferentSVISVI/mL·g-1(Δp/t)/kPa·d-1SVI/mL·g-1(Δp/t)/kPa·d-13611126NITROGENREMOVALANDOPERATIONALCHARACTERISTICSINMBRUNDERLOWDISSOLVEDOXYGENCONCENTRATIONCaoZhanping1,ZhangJingli2(1.KeyLaboratoryofhollowFiberMembraneMaterialandMembraneProcessofMinistryofEducation,TianjinPolytechnicUniversity,Tianjin300160,China;2.DepartmentofEnvironmentalandMunicipalEngineering,TianjinInstituteofUrbanConstruction,Tianjin300384,ChinaAbstract:TheremovalsofpollutantswerestudiedbysubmergedMBRtreatingmunicipalsewageunderconditionsoflowdissolvedoxygen.TheresultsshowedthatthesysteminplaceontheremovalefficiencyofCODwasnosignificantdifferencebuttheeffectofdissolvedoxygen(DO)concentrationontheremovalammonia-nitrogenandtotalnitrogenremovalwassignificantwhendissolvedoxygen(DO)was0.8～1.2,0.2～0.5and0.5～0.8mg·L-1,respectively.WhenDOwas0.8～1.2mg·L-1,theremovalrateofammonia-nitrogencouldreach90%andtheremovalrateoftotalnitrogenwasabout70%;WhenDOreducedto0.2～0.5mg·L-1,theremovalefficiencyofammonianitrogenandtotalnitrogenbothwereabout50%;whenDOis0.5～0.8mg·L-1,thetotalnitrogenremovalrateabove85%.Underdifferentoperatingconditions,EffectofDOonSVIvalueandfilamentousbulkingwerestudiedinMBR.Itshowedthatthefilamentousbulkingonthemembranefoulingwasmoreseriousthroughthemembranefiltrationanalysis.Keywords:membranebioreactor;nitrogenremoval;DO;lowdissolvedoxygenconcentration;membranefouling4461-4468.[5],,,.[J].,2002,35(5):60-65.[6]NootongK,ShiehWK.Analysisofanupflowbioreactorsystemfornitrogenremovalviaautotrophicnitrificationanddenitrification[J].BioresourceTechnology,2008,99(14):6292-6298.[7]LuH,WangJ,ShenL,etal.Steady-statemodel-basedevaluationofsulfatereduction,autotrophicdenitrification