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74Vol.7,No.420064TechniquesandEquipmentforEnvironmentalPollutionControlApr.2006(,510632),pH,pH,,COD;pH10,120min,BOD5/COD0.170.36,,SSX703A10089241(2006)04010304StudyonpretreatmentoflandfillleachateinthelaterstagebyozoneHuangBaoyuanJinLahuaLuXianyanLiuHuixuanTangChongjie(DepartmentofEnvironmentalEngineering,JinanUniversity,Guangzhou510632)AbstractOzonewastakentopretreatthelandfillleachateinthelaterstageatdifferentpHinamicro2poroustransfercontactreactorspeciallydesigned.Theexperimentalresultsshowedthattheutilizationrateofo2zoneandtheremovalofCODandhumicacidinleachatewasimprovedasinitialpHwasincreased.After120minozonationatinitialpH10,thevalueofBOD5/CODoflandfillleachateinthelaterstagewasimprovedfrom0.17to0.36,whichreflectedthatthebiodegradabilityofthelandfillleachatehadbeenimprovedmarkedly.Atthesametime,Fe2+/O3caneffectuallyremovethechromaturbidityhumicacidandSSofleachate.Keywordsozonation;leachate;biodegradability;humicacid:(640064):2004-11-30;:2005-03-15:(1980),,,E2mail:baoyuan001@21cn.com,,,[1],(10),5(BOD5)(COD)(VFA),;BOD5/COD,;,C/N,,,,,pH,,11.1:pHS23CpH,;Spectrumlab54,;WFX21C,;FY3,;VG03205,1.24,1111m,5cm,转载(y=420x-0083,R=1)[2]O3CODBOD551.42L,,0.35L/min,,25.4mg/L,8.89mg/min;30minpHSSCODBOD522.1,1992[3],,,11Table1AnalysisofleachatequalityinthelaterstagepH8.51BOD5/COD0.17()2000Zn(mg/L)1.66SS(mg/L)212(mg/L)2583Mn(mg/L)0.12Ca(mg/L)10.13COD(mg/L)2328(mg/L)932.4Cu(mg/L)0.22As(mg/L)BOD5(mg/L)405(NTU)162Cr(mg/L)2.37Cd(mg/L)1,,COD;,2.2,pH,COD22,,COD:120minCOD;120min,,,12h,120min2.3pH2.3.1pH()pH,2pHCODFig.2ChangesofCODdegradationratewithtimeatdifferentpH3pH7.08.51,60min,;150min,100%76.7%70%pH10,150min,100%2:,,401中国科技论文在线[4],(OH),,,pH10,pH,[5]2.3.2pHCODpHCOD44,pH,COD,pH10,COD,,,COD;,,CODpH11.5,COD:,CO2-330[6],pH,CO2-3,,Glaze[7],pH10.3,CO2-3HCO-34pHCODFig.4EffectofpHondegradationrateofleachateCOD,pH102.4,CHONSP,[8]:,,,,,,,,55,,,5pHFig.5ChangesofdegradationrateofhumicacidwithtimeatdifferentpH5,pH:pH,,pH10,,,pH10,235,,COD,,:[4,8],,2,,,,,,,,501中国科技论文在线(533.4mg/L),BOD5/COD,BOD5/COD01170.36,[9],,,;120min,BOD5/COD,,,;180min6pH=10Fig.6EffectofozoneonthebiodegradationofleachateatpH102.6,+,[9],,pH10,120min,2120min,,,2Table2ThepretreatmenteffectsofleachatebyozonationBOD5/COD(%)CODSS0.3616.164.6425.180.992.5,COD1611%,42%,,,SS3,pH10,120min,100%,BOD5/COD0.170.36,,;SS:120min,SS9215%8019%42.0%64.6%,[1],,..,2004,12(2):148160[2]LeeM1C1,SnoeyinkV1L1,CrittendenJ1C.Activatedcar2bonadsorptionofhumicsubstances.JAWWA,1981,73(8):440447[3],,,..,1999,18(2):9497[4],,..,1999,12(1):1719[5]..,1999,(12):1011[6],11:,1997[7]WillianH.Glaze.Thechemistryofwatertreatmentproces2sesinvolvingozone,hydrogenperoxideandultravioletradi2ation1OzoneScience&Engineering,1987,9:335352[8],,,1O3.,1998,16(6):711[9]GoelS.,Hozalski,R.M.,Rouwer,E.J.BiodegradationofNOM:EffectofNOMsourceandozonedose.J.Am.Wat.WorksAssoc.,1995,87(1):90105601中国科技论文在线