高曝气量引发的活性污泥粘性膨胀研究刘旭亮

檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲殘殘殘殘1121111．1500902．1001244SBR20、40、80、160L/h、。40L/h80L/h160L/hSVI600mL/g。20%40%。。、。EPSX703A1000－4602201117－0001－05PHR2009050220091103110011ViscousActivatedSludgeBulkingCausedbyHighAerationRateLIUXu-liang1PENGYong-zhen12PENGZhao-xu1YUZhen-bo1CHAITong-zhi11．StateKeyLaboratoryofUrbanWaterResourceandEnvironmentHarbinInstituteofTechnologyHarbin150090China2．CollegeofEnvironmentandEnergyEngineeringBeijingUniversityofTechnologyBeijing100124ChinaAbstractFoursequencingbatchreactorswereusedfortreatingsyntheticwastewatertheeffectsofaerationratesof204080and160L/honactivatedsludgesettleabilitywerestudiedandthechar-acteristicdifferencesoffourreactorsinsludgeparticlesizeextracellularpolymericsubstancesnitrogenandphosphorusremovalwereinvestigated．Goodsettleabilityofactivatedsludgeisobservedwhentheaerationrateis40L/h．Viscoussludgebulkingisslightataerationrateof80L/handbecomesseriousataerationrateof160L/hwithSVIof600mL/g．Athighaerationratetheparticlesizeofsludgewithvis-cousbulkingisdecreasedtheextracellularpolysaccharideandproteincontentsarereducedby20%and40%respectively．Theviscousbulkingsystemkeepsagoodperformanceofnitrogenremovalbutthephosphorusremovalcapacityisseriouslydeteriorated．Thereductioninaverageparticlesizeofsludgethedeteriorationofphosphorusremovalandtheexistenceofextracellularpolysaccharidesaresupposedtobethemainfactorsleadingtotheviscoussludgebulking．Reducingaerationratecaninhibitviscoussludgebulking．·1·271720119CHINAWATER＆WASTEWATERVol．27No．17Sep．2011KeywordsviscousbulkingsettleabilityaerationrateextracellularpolymericsubstancesEPSnitrogenandphosphorusremoval。。、。。12。、、、3～5。、。11.1CH3COONa0．4g/LNH4Cl0．17g/LKH2PO40．0375g/LCaCl20．04g/LNaHCO30．375g/LMgSO4·7H2O0．08g/L。COD300～330mg/LNH+4－N40～45mg/LPO3－4－P8．0～8．5mg/LCaCO3400～450mg/L。0．5mL/LTsuneda6。1.2SBR112L200mm700mm。10cm1。。。22±1℃。。、pH。26L/3h/1h//。100mLMLSS2200～2800mg/LSRT15dHRT8h。1Fig．1Schematicdiagramofexperimentalequipment1.3COD、NH+4－N、NO－2－N、NO－3－N、PO3－4－P、MLSS、SV、SVIMLVSS7SOURJoanna8DO、pHWTW340iEPS—9Folin—Lowry9NDJ－79OLYPUSBX51。1.4。SVI120mL/g。4SBR1～420、40、80、160L/h。22.1。204·2·2717．watergasheat．comSVI150mL/g。20SBR1SBR2SVISBR3SVISBR4SVI。110SBR4SV3099．5%SVI600mL/g。5h。4。、、。10。41．43、1．39、1．50、1．80mPa·sSBR4。2。2Fig．2GranulesizedistributioninfourSBRs9．28μm1．8μm75%SBR412．6μm2．69μm97%。DO＞4．5mg/L11。SBR。SBR42hDO5．8mg/L。。SBR4SOUR11．3mgO2/L·hSBR2SOUR9．3mgO2/L·h。SS5mg/LCODA。。2.2。EPSEPS70%～80%12。。EPSEPS13。LiaoEPSSVI14EPSSVI15。Forster。3Forster。3Fig．3Changeofcontentofextracellularpolysaccharidesandproteins、SBR1SBR2。SBR340SVI200mL/g250mL/g。SBR4EPSSVI·3·．watergasheat．com2717。60SVI＜350mL/gSVI＞400mL/g。SBR4EPS226mg/gVSS150mg/gVSS33．6%。。。40%20%。2.3、110SBR2SBR4、4。4、Fig．4Variationsofnitrogenandphosphorusinarepre-sentativecycleofun-bulkingandviscousbulkingsystemSBR480minSBR2DO。SBR2SBR41mg/LSBR410mg/LSBR27．8mg/L。SBR4SBR2。SBR2SBR4。2SBR15min。DO。SBR21h1mg/L10mg/L。。SBR4SVI。SBR4＜0．5mg/LSVI250mL/g＞0．5mg/LSVI400mL/g5．5～6．0mg/L10mg/L。SVI。2.4。。5。。16。①。。、。②。Schuler、PHB17。③。2.5。Novak、·4·2717．watergasheat．com1。5。。100SVI350mL/gSS。20SVI。。3①22℃、COD0．5kg/kgMLSS·d40L/h80L/h160L/h。②COD、。③、。④。1NovakLLarreaLWannerJetal．Non-filamentousac-tivatedsludgebulkinginalaboratoryscalesystemJ．WaterRes19932781339－1346．2．SBRJ．2003195100－101．3PengYGaoCWangSetal．Non-filamentoussludgebulkingcausedbyadeficiencyofnitrogeninindustrialwastewatertreatmentJ．WaterSciTechnol20034711289－295．4．SBRJ．2005251105－108．5．J．2007283545－550．6TsunedaSOhnoTSoejimaKetal．Simultaneousnitro-genandphosphorusremovalusingdenitrifyingphos-phate-accumulatingorganismsinasequencingbatchre-actorJ．BiochemEngJ2006273191－196．7．4M．2002．8JoannaSGKrzstG．NitrificationmonitoringinactivatedsludgebyoxygenuptakerateOURmeasurementJ．WaterRes19963051228－1236．9WangZLiuLYaoJetal．Effectsofextracellularpoly-mericsubstancesonaerobicgranulationinsequencingbatchreactorsJ．Chemosphere200663101728－1735．10．J．200932229－232．11．J．2009353107－109．12SponzaDT．Extracellularpolymersubstancesandphys-icochemicalpropertiesofflocsinsteady-andunsteady-stateactivatedsludgesystemsJ．ProcessBiochem2002379983－989．13．SBRJ．20103071384－1389．14LiaoBQAllenDGDroppoIGetal．Surfaceproper-tiesofsludgeandtheirroleinbioflocculationandsettle-abilityJ．WaterRes2001352339－350．15．EPSJ．2004244613－618．16．-J．200424511－15．17SchulerAJJangHoon．Causesofvariablebiomassden-sityanditseffectsonsettleabilityinfull-scalebiologicalwastewatertreatmentsystemsJ．EnvironSciTechnol20074151675－1681．1985－。[e-mail]2011－04－14·5·．watergasheat．com2717