低溶解氧污泥微膨胀的发生及脱氮除磷效果优化高春娣

3110201010ENVIRONMENTALSCIENCEVol.31No.10Oct.2010100124SBR/SVI150～220mL/g..M.parcicella、0803H.hydrossisM.parcicella.SBRCOD95%65%.//→0.75h→5h→2.25h→、1h95%5mg/LPO3－4-P95%.SBRX703.1A0250-3301201010-2385-052009-12-012010-03-15KM200910005003PYZZ0904290021831973～[e-mail]dOxygenLimitedFilamentousBulkingandOptimizationofNitrogenandPhosphorusRemovalGAOChun-diWULian-juHAOKunWANGLiCollegeofEnvironmentalandEnergyEngineeringBeijingUniversityofTechnologyBeijing100124ChinaAbstractActualdomesticsewagewastreatedbySBRprocessoperatinginAnoxic/Oxicpattern.LimitedfilamentousbulkingwasinducedbylowdissolvedoxygenatnormaltemperatureandSVIwasmaintained150-220mL/g.Occurrenceoflimitedfilamentousbulkingandgrowthofmicroorganismwereresearchedaswellasoptimizationofnitrogenandphosphorusremoval.ResultsshowedthatfilamentousbacteriathatledtolimitedfilamentousbulkingwereH.hydrossis0803typeandM.parcicellawhichwerethedominantfilamentousbacteriabythebiggestpercentage.ItwasdiscoveredthatduringphaseoflowdissolvedoxygenremovalrateofNH+4-Ndecreasedsignificantlyfromabove95%to65%withobviouslylessPO3－4-PandalittlehigherCODineffluent.RemovalratesofNH+4-NandTNweregreatlyimprovedtoabove95%bynewoperatingpatternofAnaerobic/Oxic/Anoxictransientinlet→anaerobicstir0.75h→aeration5h→anoxicstir2.25h→settlingdrainage1h.Soefficientsimultaneousremovalofnitrogenandphosphoruswasrealizedinsystemoflowdissolvedoxygenlimitedfilamentousbulking.KeywordslowdissolvedoxygenlimitedfilamentousbulkingremovalofnitrogenandphosphorusfilamentousbacteriaSBRprocess、1～9.10———.11～15.、1115..SBR.11.1SBR1.6L/anoxic/oxicA/O50%.0.1～0.2kg/kg·d0.2kg/kg·d.DO23℃±1℃.1.DOI:10.13227/j.hjkx.2010.10.021311/mg·L－1Table1Wastewatercharacteristics/mg·L－1pHCODNH+4-NNO－3-NNO－2-NPO3－4-P7.0～7.8160～28058～780.13～1.10.04～0.244.0～6.81.2.3.4.5.6.1SBRFig.1SchematicdiagramoftheSBRMLSS3000mg/L.1.2COD、PO3－4-P、NH+4-N、NO－3-N、NO－2-N、MLSS、SVIDOWTWMulti340i.OLYMPUS2BX51、Eikelboom16.22.1SBR→1.5h→2.5h→、1h2.0mg/L.SVI90～110mL/g2a.0.5mg/L20dSVI.2.0mg/L0.5mg/L“”2b.0.3mg/L6dSVI150mL/g2c.35dSVI150～220mL/g3SS2Fig.2Morphologicalcharacteristicsofsludgeflocindifferentstates.SBR.2.26832103SVIFig.3FluctuationofSVIduringtheexperiment3M.parcicella、、0803、、、、H.hydrossis、6.243.①M.parcicella4a②H.hydrossis4b③0803.M.parcicella..0.5h1718.M.parcicella.4×1000Fig.4PicturesoflimitedfilamentousbulkingsludgebyGramstaining×10002.32.3.12.0mg/L.CODC/NCOD95%65%20mg/LNO－x-N.NO－x-N19NO－x-N0.5.2.3.2NO－x-N.5NO－x-N100%50d20～22.NO－x-N7832315Fig.5EffectoflowDOtotheremovalrateofpollutants//A/O/A→→→→、1h.1gNO－3-N0.71g1gNO－2-NN20.6gNO－3-NN20.036mL4mL.、0.3mg/LA/O/A0.75h→5hCOD、、→2.25h8h0.1kg/kg·d.6、7NO－3-N.6、7A/O/A.2324TN50%.Hanaki25.6Fig.6Variationofnitrogeninacertaincycleduringlimitedfilamentousbulking7CODPO3－4-PFig.7VariationofCODandPO3－4-Pinacertaincycleduringlimitedfilamentousbulking...SBR20dCOD90%、PO3－4-P95%NH+4-N97%..SVI170mL/g3.88321031SBR23℃±1℃0.3mg/L0.2kg/kg·dSVI150～220mL/g.2、3M.parcicella、0803、H.hydrossisM.parcicella.3SVI170mL/g.4//A/O/A→0.75h→5h→2.25h→、1h95%TN5mg/LPO3－4-P95%.、.1MartinsAMPPagillaKHeijnenJJetal.FilamentousbulkingsludgeacriticalreviewJ.WaterRes200438793-817.2EikelboomDH.ProcesscontrolofactivatedsludgeplantsbymicroscopicinvestigationM.LondonUKIWAPublishing2000.3ChieasCRobertL.GrowthandcontroloffilamentousmicrobesinactivatedsludgeanintegratedhypothesisJ.WaterRes198519468-72.4CenensCSmetsIYRyckaertVetal.Modelingthecompetitionbetweenfloc-formingandfilamentousbacteriainactivatedsludgewastewatertreatmentsystems-Ⅰ.EvaluationofmathematicalmodelsbasedonkineticselectiontheoryJ.WaterRes20003492525-2534.5CenensCSmetsIYVanImpeJF.Modelingthecompetitionbetweenfloc-formingandfilamentousbacteriainactivatedsludgewastewatertreatmentsystems-Ⅱ.AprototypemathematicalmodelbasedonkineticselectionandfilamentousbackbonetheoryJ.WaterRes20003492535-2541.6JenkinsDRichardMGDaiggerGT.ManualonthecausesandcontrolofactivatedsludgebulkingandothersolidsseparationproblemsM.3rdedition.LondonUKIWAPublishing2004.1-7.7.J.1997303113-116.8.J.200626554-56.9.J.19997188-93.10.、J.200829123342-3347.11.A/OJ.200829123348-3352.12.J.20093082309-2314.13.J.200938345-1349.14.J.2009314117-122.15.J.200632121082-1086.16EikelboomDH.FilamentousorganismsobservedinactivatedsludgeJ.WaterRes19759365-388.17.J.200134279-82.18TabdoiVRossettiSBlakallLLetal.SomephysiologicalpropertiesofanItalianisolateof‘Microthrixparcicella’J.WaterSciTechnol1998374151-8.19.MLSS、pHNO－2-NJ.200521747-51.20AllferiPValterTCarmelaL.InfluenceofaerationandsludgeretentiontimeonammoniumoxidationtonitriteandnitrateJ.WaterRes2002362541-2546.21WangJLYangN.PartialnitrificationunderlimiteddissolvedoxygenconditionsJ.ProcessBiochemistry200439101223-1229.22PengYZChenYPengCYetal.NitriteaccumulationbyaerationcontrolledinsequencingbatchreactorstreatingdomesticwastewaterJ.WaterSciTechnol2005501035-43.23PochanaKKellerJ.StudyoffactorsaffectingsimultaneousnitrificationanddenitrificationSNDJ.WaterSciTechnol199939661-68.24ZhangDJLuPLLongTRetal.Theintegrationofmethanogensiswithsimultaneousnitrificationanddenitr