:2001-10-09:0254-0096(2002)06-0774-04UASB郑 平1,胡宝兰1,DeffuSoufoHerveJoe2(1.,310029;2.,0738) :,(UASB),。:UASBCOD14190mg/L,COD90%,COD6.81g/L·d,3.20L/L·d。,COD14000mg/L;COD7.00g/L·d;2d。:;;UASB:TK6 :A ,1.2~1.3[1]。,11.5,140[1]。,。,,。(),,。,,[2,3],。(UASB)。1 1.1 ,UASB。1 Table1 Somephysicalandchemicalpropertiesofcassava-processingwastewaterCOD/g·L-119.50~28.00TS/mg·L-1485~512BOD5/g·L-18.78~15.40VS/mg·L-1412~457TKN/mg·L-154.40~63.90/mg·L-10.10~0.14TP/mg·L-19.80~12.10pH3.18~4.121.2 ,1。1.3 UASB。15.87L,15.01L,0.86L。1.21m,0.13m。。。UASB1。,,。,。。1 UASBFig.1 UASBreactoranditsflowdiagram1.4 1)(COD):[4];2)(BOD5):[4];3)(TS)(VS):[4];4)(TKN):[4];5)(TP):[4];6):BSD-0.5;7):102-G,,GDX-103[5];8)(VFA):[5];23 6200212 ACTAENERGIAESOLARISSINICA Vol.23,No.6Dec.,20029):-[4];10)pH:pHS-2。2 2 CODFig.2 ThechangesofCODandcyanideconcentrationduringfreshcassavasoaking3 pHVFAFig.3 ThechangesofpHandVFAconcentrationduringfreshcassavasoaking2.1 :※※※※。,(1∶1)。(3~6d),,()。,,3dCOD;3d,(2)。COD,VFA;pH6.83.10(3)。,,。,,(2)。,,。2.2 UASBUASB8L,。4,,,35d2.52L/L·d。,20d。55d,。,。,。,。85d,3.95L/L·d。71.2%,28.5%。。,COD4000mg/L,(HRT)4.291.07d,COD0.933.64g/L·d。COD91.8%,VFA12.77mg/L。,COD3129~5444mg/L,HRT4.290.35d,COD0.929.01g/L·d。COD86.7~94.1%,VFA19.56mg/L。CODVFA,UASB。4 COD、CODFig.4 Loadingrate,biogasproductionandCODremovalduringstartup(1)andre-startup(2)2.3 UASBUASB,HRT2d,COD14190mg/L,COD90%,COD6.81g/(L·d),3.20L/(L·d)。COD22089mg/L,(2)。775 6 :UASB 2 UASBTable2 PerformancesofUASBprocessfortreatmentofcassava-processingwastewaterCOD/mg·L-1COD/mg·L-1COD/%COD/g·(Ld)-1/L·(Ld)-1HRT/d13,122.67233.7192.512.080.941.5024,940.10435.6091.182.961.431.6637,539.83681.9690.954.022.081.88410,458.78476.0095.445.232.652.00514,190.312,373.6390.276.813.202.08622,088.787,168.8867.547.732.422.855 Fig.5 Thechangesoftemperatureduringthisexperiment6 Fig.6 Theinfluenceoftemperatureonbiogasproductionoveraday2.4 2.4.1 ,5。22.7℃,24.5℃,21.4℃。,25.5℃,27.7℃,23.2℃。2.8℃。35℃[3,6],。,8:0016:00,16:00,6:00,。,2h(6)。,。2.4.2CODCODCODCOD(7)。COD14g/L,COD90%;14g/L,COD67.5%。COD,,,。7 CODCODFig.7 TheeffectofinfluentCODconcentrationonCODremoval COD。COD。,COD(8),COD90%(9)。COD7g/(L·d),(8),COD(9)。,。2.4.3HRT8 CODFig.8 TherelationshipbetweenvolumetricCODloadingrateandvolumetricbiogasproduction776 23 9 CODCODFig.9 TherelationshipbetweenvolumetricCODloadingrateandCODremoval10 HRTCODFig.10 TheeffectofinfluentHRTonCODremoval 10,UASB(COD5~6g/L),HRT0.71d。,COD90%。HRT0.71d0.53,COD80%。HRT0.48d,COD55.29%,。3 1) 21.4~24.5℃,22.7℃,UASB;,2.8℃。35℃,。2) UASBCOD14190mg/L,COD90%,COD6.81g/(L·d),3.20L/(L·d)。。3) UASB,COD14000mg/L;COD7.00g/(L·d);2d。[][1] AmbeJT,FoaguegueA.CassavaintheCameroon[A].ProductDevelopmentforRootsandTubersCrops[C].1993,3:35—39.[2] BarnesD,FitzgeraldPA.Anaerobicwastewatertreat-mentprocesses[M].In:Forsteretal.(eds)Environ-mentalBiotechnology,1987.[3] LettingaG.Anaerobicdigestionandwastewatertreatmentsystem[J].AntonieVanLeeuwenhoek,1995,67:3—28.[4] .()[M].:,1997.[5] .[M].:,1984.[6] ,.[M].:,1997.BIOTREATMENTOFCASSAVA-PROCESSWASTEWATERUSINGUASBZhengPing1,HuBaolan1,DeffuSoufoHerveJoel2(1.DepartmentofEnvironmentalEngineering,ZhejiangUniversity,Hangzhou310029,China;2.DepartmentofBiochemistry,theUniversityofYaoundeI,Yaounde0738,Cameroon)Abstract:Anupflowanaerobicsludgeblanket(UASB)reactorwasstartedupandoperatedtoinvestigateitssuit-abilityforthetreatmentofwastewaterfromcassava-processatroomtemperature.Theresultsshowedthatthelocaltemperaturewasrelativelyhighandstableenoughtosuccessfullyrunthereactor.WhenvolumetricCODloadingratesofupto7.00g/L·dwereapplied,CODremovalofgreaterthan90%andvolumetricbiogaspro-ductionof2.60~3.95L/L·dwereachieved.Duringroutineoperation,theinfluentCODconcentrationshouldbekeptlowerthanaround14,000mg/L,HRTlongerthan0.7dayandCODloadingratelowerthan7.00g/L·d.Theaerobicactivatedsludgecouldbeusedasaninoculumforanaerobicreactor.Keywords:Anaerobictreatment;cassava-processwastewater;UASBprocessE-mail:Pzheng@zju.edu.cn777 6 :UASB