AO工艺曝气量控制及pH和DO的变化规律彭峰

AOpHDO＊彭　峰(,518031)　彭永臻　马　勇(,100022)　对AO工艺研究了不同运行条件下曝气量对硝化过程的影响,以及好氧区pH和DO浓度的变化规律。发现随着曝气量的增加,平均硝化反应速率提高,平均DO浓度增加,但增加幅度降低。需通过控制曝气量大小,间接的控制硝化反应速率,使出水达标排放。可以应用平均溶解氧浓度和pH曲线上是否出现拐点,来判断反应系统的曝气是否过量、适量或不足。　曝气量　DO　pH　AO工艺　控制　　　　　　　　＊(50478040);;(20060005002)0　AO、。,。[1-6]。50%,、,,。《》(GB18918-2002)AB5mgL8mgL[7],15mgL,AO,,,。,pHDO,,。1　1.1　实验模型1,,50L,2,4(),20～21℃。、,150Ld,SRT12～15d,MLSS2400～2600mgL,,0.6,2.5。1　AO1.2　试验用水,CODCr,BOD5CODCr0.55,NaHCO3pH7～8。(gL):(0.2～0.6),(0.1～0.30),KH2PO4(0.02～0.033),NaHCO3(0.05～0.15),MgSO4·7H2O(0.09),CaCl2·2H2O(0.03),FeSO4·2H2O(0.003)。,2,。2　2.1　恒定进水负荷不同曝气量对硝化过程的影响(DO),,(DO)。CODCr300mgL,57mgL,170Ld,0.9、0.8、0.6m3h,、、,DO、pH。CODCr,40～50mgL。20.6m3h,31　　　20078254DOI:10.13205/j.hjgc.2007.04.01030.8m3h,40.9m3h。,0.6m3d,5.8mgL,0.104kg(kg·d);0.8m3d,0.85mgL,0.114kg(kg·d);0.9m3h,0mgL,0.118kg(kg·d)。,,,,,,。2　0.6m3h3　0.8m3h4　0.9m3h,,,DO,1.39、1.75、2.15mgL。,,DO,3.5mgL。,pH,pH,,pH,pH“”。,pH,,pH,pH“”。pH,pH。DO,DO2.5～3.0mgL,。2.2　恒定曝气量不同进水负荷对硝化过程的影响0.75m3h,CODCr280mgL,0.074kg(kg·d)(5)、0.100kg(kg·d)(6)0.126kg(kg·d)(7),、、、DO、pH。5　0.074kg(kg·d)6　0.100kg(kg·d)7　0.126kg(kg·d),,。0.074kg(kg·d),3,,;0.100kg(kg·d),32　　　200782540.6mgL,,,;,0.126kg(kg·d),10.8mgL,,,。,,,,。0.074kg(kg·d)0.126kg(kg·d),,3.16、2.28、1.5mgL,,,,。AO,,,,,,,。,pH“”。,pH,,pH。pH,。2.3　DO和pH参数变化的规律,。,,;,,,;,,,,,,,,、。H+,HCO-3CO2,pH。,CO2H+,,,CO2,HCO-3CO2,pH。H+,,1g,7.14g(CaCO3),pH。,pH;,,pH。pH。pHpHpH,。3　(1),,,,。AO,,,。,,,。,,,。(2),,;,,,;,,,;,,,,,、。(3)pH,,pH,。,pH,pH。[1]　,,,.AO.,2003,34(5):263-265.[2]　J.Ferrer.EnergySavingintheAerationProcessbyFuzzyLogicControl.Wat.Sci.Tech.,1998,38(3):209-217.[3]　Serralta,J.,Ribes,J.,Seco,A.andFerrer.J..Asupervisorycontrolsystemforoptimizingnitrogenremovalandaerationenergyconsumptioninwastewatertreatmentplants.Wat.Sci.Tech.,2002,45(4-5):309-316.[4]　J.Serralta,J.Ribes,A.SecoandJ.Ferrer.ASupervisoryControlSystem(37)33　　　2007825415　,,2.4×1014Ψ·cm。4　(1),,。,。(2),,。(3),,,。[1]　McDonaldJK.ElectrostaticPrecipitatorManual.NewYork:Noyes,1982:215-237.[2]　OglesbyS,NicholsGB.ElectrostaticPrecipitation.NewYork:MarcelDekker,Inc.,1978:120-155.[3]　,,..,2005,31(4):34-36.[4]　ChangChL,BaiH,Anexperimentalstudyontheperformanceofasingledischargewire-plateelectrostaticprecipitatorwithback-corona.J.AerosolSci.,1999,30(3):325-340.[5]　CrossJA.Backionizationinanegativepoint-to-planecoronadischarge.JournalofElectrostatics,1986,18(3):327-344.[6]　JaworekA,CzechT,RajchE,LackowskiM.Laboratorystudiesofback-dischargeinflyash.JournalofElectrostatics,2006,64(5):326-337.[7]　JonesJE.Onthedriftofgaseousions.Journalofelectrostatics,1992,27(3):283-318.[8]　BlanchardD,DumitranLM,AttenP.Effectofelectro-aero-dynamicallyinducedsecondaryflowontransportoffineparticlesinanelectrostaticprecipitator.JournalofElectrostatics,2001,51-52(3-4):212-217.[9]　LiangWJ,LinTH.ThecharacteristicsofionicwindanditseffectonElectrostaticPrecipitator.AerosolScienceandTechnology,1994,20(8):330-344.[10]　..:,2002:197-199.　　430081　　4212006-10-20(33)　　forOptimizingNitrogenRemovalandAerationEnergyConsumptioninWastewaterTreatmentPlants.Wat.Sci.Tech.,2002,45(4-5):309-316.[5]　P.Ingildsen,U.Jeppson,G.Olsson.DissolvedOxygenControllerBasedonOn-lineMeasurementsofAmmoniumCombiningFeedforwardandFeedback.Wat.Sci.Tech.,2004,45(4-5):453-460.[6]　D.Vrecko,N.Hvala,B.Carlsson.Feedforward-feedbackControlofanactivatedSludgeProcess-asimulationstudy.Wat.Sci.Tech.,2003,47(12):19-26.[7]　,.《》.,2003,29(9):89-94.　　100022　100　　(010)673926272006-09-27《》　82-6437　　　20078254TREATMENTOFPHARMACYWASTEWATERBYHYDROLYTICACIDIFICATION-SBRPROCESSBaiLiyun　HuXiaodong　XiaoYongshengetal(25)……………………………………………………………Abstract　Itisintroducedtheapplicationofhydrolysisacidification-SBRprocessinapharmacyfactory.Thedebuggingandrunningforaperiodoftimeshowsthatthisprocessisfeasibletotreatmixedpharmacywastewaterwhichhashighlyconcentratedorganicimpuritiesandlargevarietyofwastewaterqualityandflux.ThewaterqualityofthefinaleffluentcanmeetthesecondgradeofGuangdongLocalEffluentDischargeStandard.Ithasnotableadvantagessuchassimpleoperation,stablerunning.Therefore,thisprocessisworthytobepopularized.Keywords　hydrolysisacidification,sequencingbatchreactorandmultiplepharmacywastewaterADVANCEDPROCESSFORTREATINGDE-INKINGWASTEWATERINPAPERMAKINGPROCESSYuGuanlong　YangChunping　MaShuguangetal(28)………………………………………………………Abstract　Anadvancedprocessfortreatingde-inkingwastewaterisdescribed.Theprinciples,schematicflowdiagram,andmajorstructuresofthisadvancedtreatmentprocessarepresented,andtheeffectsofparametersofdesignandoperationofthisprocessarediscussed.Ade-inkingwastewatertreatmentprojecthasbeensetupusingthisprocessinabigpapermakingfactory.TheeffluentwaterfromthisprocessmeetsthelimitsoftheclasstwointheNationalComprehensiveWastewaterDischargeStandards(GB8979-1996).Measureshavebeenproposedtotroubleshoottheproblemsintheoeprationofthisprocess.Keywords　de-inkingwasterwater,organiccompounds,activatedsludgeprocess,advancedoxidationtechnologyandwasterwatertreatmentTHECONTROLOFAERATIONRATEANDTHEVARIATIONRULESOFPHANDDOINAOPROCESSPengFeng　PengYongzhen　MaYong(31)………………………………………………………………………Abstract　Theeffect