ABR酸解及恢复过程中的特征研究李清雪

ABR酸解及恢复过程中的特征研究李清雪,　王　欣,　刘书燕(,　056038):(ABR).pH6.0,5.0～6.0;COD,COD10%;(VFA)1g/L,15d,CODABR,109d,COD90%,ABR.:;;;VFA:X703.1　　　:A　　　:1000-5854(2007)02-0225-03(ABR)2080[1],,、、,、;2,[1,2],,,,,、.ABR.,.1　1.1　试验装置与工艺流程ABR,、、720mm,200mm,540mm,5,,1/4,55.84L.,(35.2+1)℃.1.1.2　试验基质与接种污泥　1　,,NH4HCO3,K2HPO4·3H2O,m(COD)∶m(N)∶m(P)=100∶5∶1,Fe,Cu,Mn,Ni.,35℃3.1.3　试验方法1.3.1　ABRCOD3g/L,HRT=24h,3kg/(m3·d),,(VFA),COD,pH.ABR,COD2g/L,,.1.3.2　[3]COD,VFA[4],,:20060420;:20060605:(02276703B):(1964),,,,,.31/2/20073河北师范大学学报//JOURNALOFHEBEINORMALUNIVERSITY/NaturalScienceEdition/Vol.31No.2Mar.2007DOI:10.13763/j.cnki.jhebnu.nse.2007.02.023pHS3CpHpH.　2　pH2　ABR2.1　酸化期间pH值的特征pH,pH6.8～7.2,pH,[5]pH3.5～4.5,,.2ABRpH、、pH.2:1),pH6.0,pH,pH,5.0～6.0,;2)ARB,pH7.0,,pHABR.15d,ABR,ABR.2.2　酸化期间COD的特征2:,,,VFA83%;,.2,.COD,COD10%,,.:,VFA,pH,,,CH4,COD,COD10%.2.3　酸化期间VFA的特征VFA,VFA,CO2H2,CO2H2VFA.,VFA,VFA,VFA,,VFA[4].3、VFA,3,VFA,VFA,1g/L.VFA,pH,,COD,10%.VFA,pH,COD.3　ABRABR15d,COD2g/L,pH,109d,ABR.3.1　酸化恢复期间pH值的变化情况pH4.3　VFA4　pH(20050402～20050419),pH,5.5～6.0,pH,pH6.0,ABR,.·226·(20050419～20050517),,pH,pH,pH6.07.0,pH,5.0～6.0,,pH;pH,5.56.2,pH.(20050517～20050721),pH,7.5,pH,5.8～6.0,pH6.0,[6];pH6.8.ARB.3.2　酸化恢复期间COD的变化情况,COD,COD9.9%35%,ρ(COD);,COD,,35%50%,ρ(COD);,COD50%90%,90%,ABR.COD5.3.3　酸化恢复期间VFA的变化情况VFA6.,ρ(VFA),ρ(VFA),700～850mg/L;,ρ(VFA),ρ(VFA),750mg/L600mg/L,ρ(VFA),800mg/L,ρ(VFA)700mg/L;,ρ(VFA),、ρ(VFA)700,600,100mg/L,Buwell[7],ρ(VFA)200mg/L,ABRρ(VFA)700mg/L.VFA.5　、COD6　、VFA4　　ABR,pH6.0,5.0～6.0;ρ(COD),COD10%;ρ(VFA)1g/L.pH.15d,CODABR,109d,COD90%,ρ(VFA)100mg/L,pH7.5,ABR,ABR.ABR,,109d.:[1]　.[M].:,2002.224-228.[2]　.[M].:,1996.8-10.[3]　.[M].3.:,1997.354-356.[4]　.[M].:,1998.519-521,509.[5]　,.ABR[J].,2004,24(1):20-26.[6]　.ABR[J].,2004,5(2):46-51.[7]　BUSWELLAM,BARFORDJP.Precipitation,ChelationandtheAvailabilityofMetalasNutrientsinAnaerobicDigestionⅡ[J].ApplicationsBiotechandBioeng,1994,15:1039.(下转第232页)·227·[8]　,,,.[P].:CN1743352A.2006-03-08.[9]　,.P(BA-EHA)/PVC[J].,2003(4):513-518.[10]　,.[J].,2005,34(4):199-201,208.[11]　,./PVC[J].,2005(2):31-33,53.StudyonPolyurethaneModifiedpoly(VinylChloride)CompositeEmulsionResinsZHANGXiao-lei1,2,　PANMing-wang1,　XINGSheng-nan1,　LIJing-sheng3(1.InstituteofPolymerScienceandEngineering,HebeiUniversityofTechnology,Tianjin　300130,China;2.HebeiInstituteofEnergy,HebeiShijiazhuang　050081,China;3.CollegeofChemicalandPharmaceuticalEngineering,HebeiUniversityofScienceandTechnology,HebeiShijiazhuang　050018,China)Abstract:Ionomer-typeofpolyurethane(PU)emulsionwaspreparedfromtoluenediisocyanate,polypropy-leneglycolanddimethylolpropionicacid,followingaself-emulsificationprocess.ThemodifiedPVCemulsionresinwasobtainedbyin-situemulsioncopolymerizationusingPUasseedsinanautoclave.TheeffectofPUmolecularweightonthemechanicalpropertiesandthermalstabilityofthePU/PVCmaterialswasinvestigated.Thecompositelatexparticlesandcompositematerialweredeterminedandcharacterizedusinglaserpartivlesizeanalyzerortransmissionelectronmicroscopyorscanningelectronmicroscopy,respectively.ThestudyresultshowedthatthePU/PVChybridemulsionparticleshadacore/shellstructure.Thegeneralmechanicalpropertiesofthecompositematerialsincreased.However,thethermalstabilitiesdecreasedalittle.ThefracturedsurfaceofthePU/PVCcompositesampleappearedmuchtough.Keywords:polyurethane;poly(vinylchloride);emulsionresin;modifying(　　)(上接第227页)CharacteristicsofHydrolysis-acidificationandRecoverProcessinanAnaerobicBaffledReactorLIQing-xue,　WANGXin,　LIUShu-yan(CollegeofUrbanConstruction,HebeiUniversityofEngineering,HebeiHandan　056038,China)Abstract:Thecharacteristicsofhydrolysis-acidificationandrecoverprocessinananaerobicbaffledreactorwereinvestigated.Duringthehydrolysis-acidificationperiod,pHofeverycompartmentwerelowerthan6.0,allchangedbetween5.0～6.0;CODremovalratewas10%only,andVFAofeverycompartmentwashigherthan1g/L.Thissituationlastedfor15d,afterthat,onlybydecreasingorganicloadingthesystemcouldbereturnedtothenormalconditionsafter109doperation,andtheCODremovalratereached90%.Keywords:hydrolysis-acidification;decreaseorganicloading;recover;VFA(　　)·232·