UniTank工艺流程中磷酸盐浓度的非稳态特征董姗燕

26　12007　　1　　　ENVIRONMENTALCHEMISTRYVo.l26,No.1January　2007　“”(2006810).　*(042312042).**.UniTank*董姗燕1　汪喜生2　王文佳1　许　洲2　姚重华1**(1　,,200237;2　,,200942)　　ASM2DUniTank,.,UniTank,,.　UniTank,,.　　UniTank.,,,.,UniTank,.,UniTank.,UniTank.　　UniTank,,,UniTank.1　　　UniTank.6h,4.,,,、;,,、.(CSTR),0.3.　　ASM2D[1],3(、、),4(、、、),3(、、PHB),2(、).PI5mmoll-1,.　　ASM2D,3、6、8、2.ASM2D.COD、,COD.ASM2D20℃,[2].2　　　1UniTank.1,2(12h,14.5d—15d).T1,14.5d0.7mgPl-11.0mgPl-1,14.75d0.72　　　　　　　　　　26mgPl-1,1.14.75d15d,T1.T3T1,0.5,0.5.T20.3—0.5mgPl-1,2,T2T1T3,0.5.1　UniTankS-PO4Fig.1　Thedynamicbehaviorofconcentrationofortho-phosphateintheUniTankprocess　　UniTank,.,4,、、,:[d(S-PO4)/dt]=[d(S-PO4)/dt]+[d(S-PO4)/dt]+[d(S-PO4)/dt]+[d(S-PO4)/dt]　　2(A)T13().2(A),,,T1[d(S-PO4)/dt],,[d(S-PO4)/dt]=14.,,[d(S-PO4)/dt]-7.5,;,[d(S-PO4)/dt]-3.5.,{[d(S-PO4)/dt]+[d(S-PO4)/dt]+[d(S-PO4)/dt]}+3(),.145min14.85d,,,,0,T1,.2　UniTankS-PO4Fig.2　Theanalysisforthedynamicbehaviorofconcentrationofortho-phosphateintheUniTankprocess　　,,,,T1(1.42),(-0.57),(-2.7—-3.7),,(-1.6—-3.2),　1:UniTank3　　　　,.　　T22(B).2(B),T2UniTank,()2,UniTank、.,145minT2T1,0—-2.3,;35minT2,()1.5—5.9,..3　　　,d(S-O2)/dtKLa,:d(S-O2)/dt=KLa[(S-O2)*-(S-O2)],(S-O2)*,(S-O2).、,[d(S-O2)/dt]:[d(S-O2)/dt]=KLa’,KLa’=KLa[(S-O2)*-(S-O2)](KLa217—280d-1,KLa120—145d-1).　　UniTank.3,,KLa’480—580;KLa’870—1120.3,,KLa’,(14.78d),KLa’1070—1120.,,.,,;,,,.,,.3　KLa’S-PO4Fig.3　TheinfluenceoftheaerationstrengthKLa’ontheortho-phosphateconcentrationintheUniTankprocess　　3,KLa’,.“”.,,,、[3].KLa’,,,,.3,,,.　　4.4,,,KLa’=1120.14.78d.4　　　　　　　　　　26,,;,.34,34,,.4　KLa’S-NO3Fig.4　TheinfluenceoftheaerationstrengthKLa’onthenitrate-nitrogenconcentrationintheUniTankprocess4　　　ASM2DUniTank,UniTank,,、20%.,UniTank,,.　　　[1]　HenzeM,GujerW,MinoTeta.l,ActivatedSludgeModelNO.2DASM2D.Wat.Sci.Tech.,1999,39(1)∶165—182[2]　,,ASM2D.,2005,24(2)∶129—134[3]　GradyJrCPL,DaiggerGT,LimHC,BiologicalWastewaterTreatment(the2ndEdition),NewYork:MarcelDekker,1999,104—105　*Towhomallcorrespondencesshouldbeaddressed.NON-STEADYSTATEOFORTHO-PHOSPHATECONCENTRATIONINAUNITANKPROCESSDONGShan-yan1　　WANGXi-sheng2　　WANGWen-jia1　　XUZhou2　　YAOChong-hua1*(1　ResourceandEnvironmentalEngineeringSchool,EastChinaUniversityofScienceandTechnology,Shanghai,200237,China;2　ShanghaiShiDongKouUrbanSewageTreatmentandManagementCo.Limited,Shanghai,200942,China)ABSTRACT　　Dynamiccharacteristicsofortho-phosphateconcentrationinaUniTankprocessinShanghaiShidongkouurbansewagetreatmentplantwasstudiedbyusingamathematicalmodelbasingonASM2D.Theresultsshowthatortho-phosphateintheUniTankprocessisonnon-steadystate.Variationoftheconcentrationofthespeciescanbeaslargeas20%.Strengtheningaerationmayincreasethenitrate-nitrogenconcentrationinthevessels,andinterferetheanaerobicconditionthatisnecessaryforortho-phosphatereleasefromthephosphorusaccumulatingorganism(PAO).Thismayresultintheincreaseoftheortho-phosphateconcentrationintheeffluen.t　　Keywords:UniTankprocess,ortho-phosphate,non-steadystate.