AOMBR工艺丝状菌膨胀的发生及其控制

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A/O－MBR旻411105A/O－MBR。。。pH9．0。A/O－MBRX703A1000－4602201223－0001－04OccurrenceandControlofFilamentousBulkinginA/O-MBRBiologicalNitrogenRemovalProcessHOUJin-caiHUANGLi-qunFANGZhengMAXiangTANGXiao-minHunanProvincialUniversityKeyLaboratoryofHeavyMetalPollutionControlSchoolofChemicalTechnologyXiangtanUniversityXiangtan411105ChinaAbstractThepossibilityoffilamentoussludgebulkinginA/O-MBRbiologicalnitrogenremovalprocessfortreatmentofsimulatedwastewaterwasinvestigated．TheresultsshowedthatintheA/O-MBRbiologicalnitrogenremovalprocessbothexcessivenitrificationandhighimpactloadcouldcausefilamen-toussludgebulking．Forthefilamentousbulkingcausedbythesetwofactorsthecontrolofthefilamen-tousbacteriacouldnotbeachievedbysimplyrecoveringoperationparametersoftheprocess．Whileim-provingthepHintheaerationtankto9．0orsoandmaintainingthatlevelcouldinhibitandkillthefila-mentousbacteria．Besidesthefilamentoussludgebulkingwouldnotrecurinashortterm．KeywordsfilamentousbacteriasludgebulkingA/O-MBRprocessnitrificationreactioncontrol2010ZX07212－008A/O－MBRMBR1。A/O。A/O－MBR。·1·2823201212CHINAWATER＆WASTEWATERVol．28No．23Dec．2012、pHDO、。2。34。A/O－MBR、pH、DO。pH。11.1A/O－MBR1。1A/O－MBRFig．1SchematicdiagramofA/O-MBRbiologicalnitrogenremovalprocess××=2．2m×0．8m×2．2m3．384m30．8m3、1．368m3、MBR1．216m3。MBR。200L/h、8min、2minMLSS2500mg/L200%OMBRDO2．0～3．0mg/LADO＜0．3mg/L。1.2NH4Cl、Na3PO4·12H2OK+、Ca2+、Na+、Mg2+。Na2CO3。1。1Tab．1QualityofwastewaterCOD/mg·L－1339～392365NH+4－N/mg·L－155．6～64．560．2TN/mg·L－164．3～73．468．6TP/mg·L－14．3～5．75．2pH6．7～7．27．0/℃25～33281.3CODNH+4－NMLSSpHpHDOSV30。22。、83h0．2～0．3kgBOD/kgMLSS·d60mg/L。A/O－MBR23。OSV3068%SVI272mL/g。。。。。·2·2823．watergasheat．compHDO。2.1A/O－MBR。1g7．14gCaCO3pH。2pH。2NH+4－NpHFig．2VariationofNH+4－NconcentrationandpHvalueinaerobictank2.1.1NN5。21．5h5mg/L。、。。2.1.2pH、pH6．5～8．0。pH。pH＜6．0。pH1hpH6．0。。2.2A/O－MBRCOD。COD。CODCOD。3CODDO。3CODDOFig．3VariationofCODandDOconcentrationinaerobictank2.2.1。。。31hCOD98．7mg/L0．06kg-BOD/kgMLSS·d。。。2.2.2DO。DO6。3·3·．watergasheat．comA/O－MBR2823DO。0．75hDO。30．5～1．5hDO1．0mg/L。DO1．0mg/L7。3pHpHpH8。A/O－MBRNa2CO3pH9．0SVI378mL/g200mL/g。。。20SVI113mL/g。。。21Na2CO3pH7．0。pHSVI100～120mL/g。。A/O－MBRpH。4①A/O－MBR99%＜1．0mg/L。。。②A/O－MBR。。③pH。pH9．07d20d。。1．A/OJ．200931238－4146．2MartinsAMPPagillaKHeijnenJJetal．Filamentousbulkingsludge—acriticalreviewJ．WaterRes2004384793－817．3．A2/OJ．200828121074－1078．4．pHJ．200033253－57．5．J．200425654－58．6MartinsAMPVanLoosdrechtMCMHeijnenJJ．Effectoffeedingpatternandstorageonthesludgesettle-abilityunderaerobicconditionsJ．WaterRes200337112555－2570．7．M．1992．8．2M．2011．1987－。[e-mail]2012－08－08·4·2823．watergasheat．com