产酸相最佳发酵类型工程控制对策

1998,18(5):398~402ChinaEnvironmentalScience*(,150008),,,,:34~38,pH4.0~4.4,Eh-300~-400mV,HRT5~6h;4gCOD/gVSSd,2.5gCOD/gVSSdTheoperationalcontrollingstrategyabouttheoptimalfermentationtypeofacidogenicphase.LiJianzheng,RenNanqi(SchoolofMunicipalandEnvironmentalEngineering,HarbinUniversityofCivilEngineeringandArchitecture,Harbin150008).ChinaEnvironmentalScience.1998,18(5):398~402AbstractFromthetraditionalviewpoint,themethanogenicstepisthelimitingstageintheprocessofanaerobicdigestion.Theresultsobtainedbystudyingtheoftwophaseanaerobicdigestionshowedthatacidogenicfermentationstageplayedanimportantroleinthesuccessfulrunoftheanaerobicbiotreatmentsystem.Asoneofthreeacidogenicfermentationtypes,theethanoltypewasprovedtobetheoptimal.Theoperationalcontrollingstrategyabouttheethanoltypefermentationwasstudiedusingacontinuousflowsystemoftwophaseanaerobicbiotreatmentsystem.Theresultsshowthattheoptimaloperationalcontrollingparametersaretemperature34~38,pH4.0~4.4,Eh-300~-400mV,HRT5~6h.Thesludgeloadingrateshouldbelessthan4gCOD/gVSSd,with2.5gCOD/gVSSdastheoptimalfigure.Keywords:wastewatertreatmentacidogenicfermentationtwophaseanaerobicbiotreatmentoperationalcontrollingparameter,,,123,CO2/H2,,,NADH/NAD+3,,,,(20~40),11.1(921144741.1)(CSTR),13.7L,4.3L,UASB,200mm,84L,62.8L,351,:19980116*(59578021)11Fig.1Flowchartoftwophaseanaerobicbiotreatmentsystem1.2,7d357.5~14.5kgCOD/m3d,20d,,1.3,NP,CODNP=10005122.12.1.12(COD),35,2.1.2pH3,pH4.0~5.0,,4.4pH5.0,,2;4.0pH4.4,,,,pH4.0~4.42Fig.2Effectoftemperatureonbiogasproductionandacidproducedrate3pHFig.3EffectofpHonacidgrupofproducts2.1.3Eh-200~-500mV,,,Eh-300~-400mV2.22.2.1,COD(4),,(5)6COD,COD(3630mg/L),COD,(1)COD(4000mg/L)3995:,COD,(2,3,COD4480mg/L6255mg/L)BOD(4),5%4Fig.4Relationofvolumeloadingrateonaerogenicrate5Fig.5Relationofvolumeloadingrateonbiogasproduction6CODFig.6EffectofvolumeloadingrateonCODremovalrateinacidphasereactor,,15%~25%,,3:;();2.2.2(7~9),1.5~2.5gCOD/gVSSd,(7);,2.5gCOD/gVSSd,,(8);4gCOD/gVSSd,pH3.8,,,7Fig.7Effectofsludgeloadingrateonthetotalproductionofacidgroup8Fig.8Relationofsludgeloadingrateonbiogasproduction9pHFig.9RelationbetweenthepHofexhaustoutletandthesludgeloadingrate,4gCOD/gVSSd,400182.5gCOD/gVSSd2.3,35HRT()4.1h(10),120~130r/min(RMP),,,,,,,,,;,,,10Fig.10Effectofmixingrateonacidogenicphase2.411,(HRT)4~6h,,5~6h;HRT9~10.5h,;HRT7~8h,,,HRT,,HRT5~6h11Fig.11Effectofretentiontimeonthetotalproductionofacidgroup2.512,,COD80%COD2500~4000mg/L,COD92%(1),COD4000~6500mg/L,COD85%(2),12CODFig.12EffectofvolumeloadingrateontheremovalrateoforganicmatterinmethanoginicphaseBOD,95%,(CODMLSSpH),,,,4015:,,33.1,:pH4.0~4.4,34~38,Eh-300~-400mV,2.5gCOD/gVSSd,HRT5~6h3.2pHHRTEh,,3.3,4gCOD/gVSSd,,3.4COD15%~25%,,,;();3.51CohenA,GemertJMvan,ZoetemeyerRJ,etal.Maincharacteristicsandstoichiometricaspectsofacidogenesisofsolublecarbohydratecontainingwastewater.ProcessBiochem.,1984,19:2282.:.:,19933,,..,1995,13(1):1~6,196512()()21~5619981~5,(NOAA),199719981~5,0.25,NOAA:,600,,Chem.&Eng.News,June15,24(1998)40218