不同运行方式下低溶解氧污泥微膨胀的可行性研究王中玮1

32820118ENVIRONMENTALSCIENCEVol．32No．8Aug．20111112111.1001242.150090DO．4SBRDODO=0.5mg/L、、．60～90min．DO、2．//．X703．1A0250-3301201108-2347-062010-09-102011-01-2720091103110011QAK2010061986～．*[e-mail]itedFilamentousBulkingUnderLowDissolvedOxygenatDifferentOperationRegimesWANGZhong-wei1PENGYong-zhen1WANGShu-ying1GUOJian-hua2HUANGHui-jun1ZHENYa-nan11.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineeringBeijingUniversityofTechnologyBeijing100124China2.StateKeyLaboratoryofUrbanWaterResourceandEnvironmentHarbinInstituteofTechnologyHarbin150090ChinaAbstractLimitedfilamentousbulkingunderlowdissolvedoxygenDOisanewtechnologyforenergysavingandhighqualityeffluent．InordertoinvestigatethefeasibilityofthistechnologyfoursequencebatchreactorsSBRswereoccupiedtooperateatdifferentregimestostimulatedifferentprocessesunderlowDO0.5mg/L．Sludgesettleabilityflocstructurepollutantremovalandaeratedenergyconsumptionwereinvestigated．TheresultsshowedthatlimitedfilamentousbulkingunderlowDOwashardtorealizeinthesingle-stageaerobicreactorsfortheywerepronetobulkingseverelywhileitcouldbeachievedstablyinthepre-denitrificationreactorswhenthefeedlengthwasbetween60and90minutes．ComparedwithnormalsludgeatthesameDOlimitedfilamentousbulkingsludgeacquiredbylowDOdisplayeditshighenergy-savingeffect．Inadditionthespecificammoniaconsumptionrateoflimitedfilamentousbulkingsludgewasabout2timeshigherthantheoneofnormalsludge．Onthecontrarythetotalnitrogenremovalefficiencywaslower．Furtheranalysisindicatedthatstablelimitedsludgebulkingcouldbeachievedinagoodalternativeanoxic/anaerobic/aerobicconditionwithouttoohighorganicloading．Keywordslowdissolvedoxygenlimitedfilamentousbulkingfeasibilityoperationregimesenergysaving．、．12．2、34A/O5SBR．A/OSBRDO、．．4SBR、A/O4．DOI:10.13227/j.hjkx.2011.08.0513211.11．SBR5LPLC．DO0.5mg/LPLCDO0.5mg/LDO0.5mg/L．DO26．40L/h．500r/min25℃pH7.0～8.0．15dMLSS1500～2500mg/L．2.5L0.5．．4SBR1．SBR1SBR2SBR1+SBR2SBR31.PLC2.3.4.5.pHDO6.7.8.9.10.11.12.13.HCl14.NaOH1SBRFig．1SchematicdiagramoftheSBRSBR4SBR3+A/OSBR4A/O．6h4．1SBR1/minTable1OperatingphaseandlengthduringoneSBRcycle/minSBR10～100～180180～182182～350350～360SBR20～1800～180180～182182～350350～360SBR30～100～120120～300300～302302～350350～360SBR40～600～120120～300300～302302～350350～3601SBR330～47d90min1.2．NaAc4.69mmol/LCOD300mg/LNH4Cl2.14mmol/LNH+4-N30mg/LNaH2PO40.48mmol/LPO3－4-P15mg/LKCl0.48mmol/LCaCl20.10mmol/LMgSO40.37mmol/L1ml/L7．30d．1.3．COD、SV、MLSS、NH+4-N、NO－2-N、NO－3-N、PO3－4-P3．OLYMPUS2BX52．MalvernMastersizer2000MalvernInstrumentsLtd．UK．22.12.1.122a．+SBR120dSVI54mL/g340mL/gSBR214dSVI337mL/g．SVI＜800mL/g15.6mL·g·d－125.4mL·g·d－1．DO．Palm8．CODDO8．843282Fig．2SludgesettleabilityexpressedasSVIduringthewholeoperatingperiodMonodμi=μmaxiSKSi+S·DOKOi+DOi=1、2S．DO2DO．240d．2.1.22SBR3SBR4．2bSBR310minSVI95mL/g50mL/g．60minSBR47dSVI203mL/g18.0mL·g·d－1SVI100～250mL/g．SBR390minSVISBR418.9mL·g·d－1SVI110～190mL/g．2Table2Physiologicalpropertiesoffilamentousbacteriaandfloc-formingbacteria1μmax/h－10.60.292KS/mg·L－16440103DOKDO/mg·L－10.10.027104Kd/h－10.0060.00295Y0.1530.13910610SVI4①1112②———2③RBCODPAOsGAOs．RBCOD132④PAOsGAOs7．PHA、PAOsGAOs2．DO．．SVI943232①～③．2.22.2.13SBR1．3a．17dSVI=188mL/g3b．10d3c．．SBR2SBR1．3SBR1×400Fig．3FlocstructureatdifferentstateinSBR1400multiplesphase-contrast2.2.2．10minSBR34a．60minSBR44b．SBR390minSBR4．4SBR3SBR4×400Fig．4FlocstructureatsteadystateinSBR3andSBR4400multiplesphase-contrast5．210min60min150μm200μm＜200μm30.84%71.35%．5SBR3SBR4Fig．5GranulesizedistributionatsteadystateinSBR3andSBR42.3DO2．SBR1SBR2COD61.6%67.1%．DO．6SBR3SBR4．SBR36a．COD15～25mg/L05328PHA．4.40mg·g·h－1．NO－x-NNO－2-N+NO－3-NNO－2-NNO－3-N0.5mg/L1.0mg/LSND．SBR4CODDO8.88mg·g·h－1SBR326b．、SBR4SBR3DO．SBR4SNDSND．SBR390minSBR4．SBR3SBR4COD90%．．60min90minSND10min79.7%57.4%．79.7%60.4%．6SBR3SBR4Fig．6TypicalparameterprofileduringanormalcycleonfourSBRs2.43DODO=0.5mg/LDO=2.0mg/L．DOPLC0.5mg/L．．PLC3．DO．10min10%．6bCOD1hOUR．60min90min2hOUR10min36.1%34.8%．．4．DO．DO．Martins14DO13min15min．DO．3、OURTable3AerationtimeOURandenergysavingeffectunderdifferentfeedinglength/h180～300minOUR/g·kg·h－1/%10min1.88±0.1420.13±4.33—60min1.70±0.157.22±2.479.690min1.68±0.177.02±1.6610.615323260～90min．A/O．．//．//．．．DODO3415．．．31DO=0.5mg/L60～90minSVI100～250mL/g．DO．210min60min＜200μm30.84%71.35%．3DODO210%．SND60min90min10min79.7%60.4%．4．//．1GuoJHPengYZPengCYetal．EnergysavingachievedbylimitedfilamentousbulkingsludgeunderlowdissolvedoxygenJ．BioresourceTechnology201010141120-1126.2．、J．200829123342-3347.3．A/OJ．200829123348-3352.4．J．200632121082-1086.5．SBRJ．20106161534-1539.6LiHJChenYGGuGW．Theeffectofpropionictoaceticacidratioonanaerobic-aerobiclowdissolvedoxygenbiologicalphosphorusandnitrogenremovalJ．BioresourceTechnology200899104400-4407.7MartinsAMPHeijnenJJVanLoosdrechtMCM．BulkingsludgeinbiologicalnutrientremovalsystemsJ．BiotechnologyandBioengineering2004862125-135．8PalmJCJenkinsDParkerDS．Relationshipbetweenorganicloadingdissolved-oxygenconcentrationandsludgesettleabilityinthecompletely-mixedactivatedsludgeprocessJ．JournalWaterPollutionControlFederation19805