二沉池污泥沉降特征参数探讨及泥位动态仿真陈立爱

7《》@vip.126.com2[e-mail]*[e-mail]。EnvironmentalScience&Technology39720167Vol.39No.7Jul.2016.[J].2016397135-140.ChenLi'aiHouHongxunChenJinlan.Parameterizationsofsludgesettleabilityanddynamicsimulationofsludgeblanketlevelforsecondaryclarifier[J].EnvironmentalScience&Technology2016397135-140.122*11.2306012.230061SVISVLabVIEWMLSS4.0g/LSV30MLSSSVIMLSS4.0g/LSV30MLSSSVI。X703Adoi10.3969/j.issn.1003-6504.2016.07.0251003-6504(2016)07-0135-06ParameterizationsofSludgeSettleAbilityandDynamicSimulationofSludgeBlanketLevelforSecondaryClarifierCHENLi'ai12HOUHongxun2*CHENJinlan11.CollegeofMechanical&ElectricalEngineeringAnhuiJianzhuUniversityHefei230601China2.AnhuiGuozhenEnvironmentalProtectionScienceandTechnologyLimitedLiabilityCompanyHefei230061ChinaAbstractAsthemainunitofwastewatertreatmentplanttheoptimaloperationofsecondaryclarifierisveryimportant.Inpracticethereisoftenalackofdeepunderstandingwhichleadstogetthepoorperformanceofthesludgesettleability.BasedontheproblemsthispaperdiscussedtheproblemoftheempiricalcharacterizationofsludgesettleabilityandputforwardtheconceptofSVwhichindicatedthesludgesettlingratiointhehydraulicretentiontimeofthesecondaryclarifier.BasedonSVsolidfluxtheoryandmassconservationthemathematicalmodelofthesecondaryclarifierwasestablishedandthedynamicsimulationofthesludgeblanketlevelandreturnsludgeconcentrationofsecondaryclarifierinawastewatertreatmentplantinBeijingwascarriedoutbyusingtheLaboratoryVirtualInstrumentEngineeringWorkbenchLabVIEW.TheresultsindicatedthatwhentheactivatedsludgehadthelowconcentrationMLSS4.0g/LSV30andMLSSpresentedtheapproximatelinearrelationshipandSVIcouldbeusedtomeasurethesettleabilityofthesecondaryclarifier.HowevertherelationshipbetweenSV30andMLSSchangeswiththeincreaseofMLSSMLSS4.0g/LthemethodusingSVItomeasurethesettleabilityofthesecondaryclarifiercan’tbeacceptedduetothelargeerror.Themodelcanpredictthechangetendencyofthesecondaryclarifierinfutureandalsoprovidetechnicalsupportfortheoptimizationcontrolofthewastewatertreatmentplant.Keywordswastewaterparameterestimationdynamicsimulationsecondaryclarifiersludgevolumeindexsludgeblanketlevel39。、[1-4][25]。、TP、。312、、pH3SVI、ESS、SRT、R、MLSS、DO。[6]、。[7]。AthanasiaMGoula[8]1℃。FangL[9]CFD。JensenA[10]。Buhr[11]SPA。ChatellierP[12-17]、。SV30、。SV30、、。11.120m33.4h0.58m3/m2·h。1.230minSV30SVI2。SV3030minSVI30min1g100mL30minSV30MLSSSVI1SVI=SV30MLSS1SVI70～200SVI。。22.1SVISVI[18]SVISVI[19-20]。100mLMLSS10g/L30min1SVI100。7SVI。1L2L2h。SVI、240min30min5min30min30min360min21。240min。1SVIADECFB。DFBE、C。。SVIMLSS1。A、C、E2.8~3.1g/LB、DF5.6~5.7g/L。SV30MLSS1SVISVI2。2ACBFDE。CEFB、D。23。3SVIA。SV30MLSSSVI。SV30MLSSBoltzmann2。2SV30SV30MLSSMLSS4.0g/LSV30MLSSSV30。SVI3A、E、C2AEC。MLSS4.0g/LSVI。SVI、、SVI。2.21A-FMLSSTable1TheMLSSvalueofsludgesamplesAtoFABCDEFMLSS/g·L-13.15.62.85.62.85.72A-FSV30SVITable2SV30andempiricalvaluesofSVIofsamplesAtoF123456AECFBDABFDECABCDEFSV30/%318670905370SVI/mL·g-11001542501611891233SVITable3ComparisonofempiricalvalueswithrealvaluesofSVI39。30min30min。2~4hHRTHRT。SV。SV。SV。SV2。SV=SBL×S×241+R×Q=α·HRT22hSBLmSm2R%Qm3/dα%。SV1000mLHRT1000mL。SVSV30SVSV30。5SV30SV3SV30SV。SVSV30SV=0.24608*expSV30/18.16214+22.205293SV303SVSV。3LabVIEW3.141234。W=W0+t0乙MLSS*1+RQ-MLSSr*R*Q-MLSSe*Q-MLSS*Qedt44WtkgW0kgMLSSg/LR%Qm3/dQem3/dMLSSrg/LMLSSeg/L。3.22、3、4LabVIEWMLSS、R、SV30、HRT75。5aR=78%、SV30=82%、MLSS＝5.5g/L2.2mMLSSr12g/LSBL。。SBL。。。SBLMLSSr6。MLSS、R、SV30SBLMLSSr。6SBLMLSSr。39。。123。4SVISV30SV1SVIMLSS4.0g/LSVIMLSS4.0g/LSVI。2SV。3、。4。[][1]KimHSShinMSJangDSetal.Studyofflowcharacteristicsinasecondaryclarifierbynumericalsimulationandradioisotopetracertechnique[J].AppliedRadiation&Isotopes2005634519-526.[2]ParkerDSKinnearDJWahlbergEJ.Reviewoffolkloreindesignandoperationofsecondaryclarifiers[J].JournalofEnvironmentalEngineering20011276476-484.[3]DavidRSaucezPVaselJetal.Modelingandnumericalsimulationofsecondarysettlersamethodoflinesstrategy[J].WaterResearch2009432319-330.[4].[J].200427312-13.SongXiaomingYangJianLiuZhuangquan.Studyondynamicsedimentationofsludge[J].EnvironmentalScience&Technology200427312-13.inChinese[5]SalehAMHamodaMF.Upgradingofsecondaryclarifiersbyinclinedplatesettlers[J].WaterScienceandTechnology1999407141-149.[6].[J].2008163794-798.LiYannaZhouQing.Ecologicalconceptoffilamentoussludgebulking[J].ChineseJournalofEco-agriculture2008163794-798.inChinese[7].[J].2002181068-70.YangQingGanShuyingLiuSuiqing.Mechanismandavoidingmeasuresofanti-nitrificationandmudinsecondaryclarifiers[J].ChinaWater&Wastewater2002181068-70.inChinese[8]AthanasiaMGoulaMargaritisKostoglouThodorisDetal.Theeffectofinfluenttemperaturevariationsinasedimentationtankforpotablewatertreatmentacomputa-tionalfluiddynamicsstudy[J].WaterResearch2008423405-3414.[9]FanLXuNKeXetal.Numericalsimulationofsecondarysedimentationtankforurbanwastewater[J].JournaloftheChineseInstituteofChemicalEngineers2007385425-433.[10]Lynggaard-JensenAAndreasenPHusumFetal.Increasedperformanceofsecondaryclarifiersu