高硫酸盐难降解废水高温厌氧处理中限量曝气的应用及影响周伟丽

1,2,3,3(1.,1-1,　501-1193,;2.,　100084;3.,2-16-1,755-8611,):,UASB.,.,.2,COD,40%～50%60%～70%.,.:;UASB;;;;:X703;X505　:A　:0250-3301(2006)07-1339-06:2005-05-18;:2005-07-13:(1973～),,,.EffectofLimitedAerationontheThermophilicAnaerobicTreatmentofHigh-SulfateRefractoryWastewaterZHOUWei-li1,WANGYan-chun2,IMAITsuyoshi3,UKITAMasao3(1.RiverBasinResearchCenter,GifuUniversity,1-1Yanagido,Gifu501-1193,Japan;2.TsinghuaUnisplendourEnvironmentalProtectionCo.Ltd.,Beijing100084,China;3.Dept.ofCivilandEnvironmentalEngineering,YamaguchiUniversity,Tokiwadai2-16-1,Ube,Yamaguchi755-8611,Japan)Abstract:Athermophilicup-flowanaerobicsludgeblanket(UASB)reactorwasusedtotreathigh-sulfaterefractorywastewaterfromasulfitepulpmill.Themicroorganismswereinhibitedsignificantlyastheresultofsulfatereduction.Basedontheconsiderationthatthelimitedaerationmaystriphydrogensulfideoutandoxidizepartofthesulfideintonontoxicelementalsulfur,limitedaerationwasintroducedintothereactorlatertoreducetheinhibition.Thereactorshowedmuchbetterrunningstabilityandhighertreatmentcapacitythereafter.CODremovalincreasedfrom40%～50%to60%～70%whentheorganicloadingrate(OLR)wasdoubled.Thisstudyverifiedthatsomemethanogenscouldbeaerotolerantwhilesomeofthefermentationbacteriamightbesensitivetotheincompleteanaerobicsurroundings.Keywords:limitedaeration;UASB;thermophilictreatment;inhibition;sulfurcompounds;refractorymaterials　　/、、,,,.[1,2],,(SRB),,[3],,,,[4].,,[5]、-[6]、[7]、pH[8].,.,.,,UASB.,,[9,10].,,27720067　　　　　　ENVIRONMENTALSCIENCEVol.27,No.7Jul.,2006DOI:10.13227/j.hjkx.2006.07.015,.,.1　1.1　.70℃,1.1,pH,,,,.(N、P),,BOD5/CODCr0.2.COD/SO2-410,[11,12].COD,CODSO2-4.1　/mg·L-1Table1　Characteristicsoftherawwastewater/mg·L-1pH2～3MLSS1900～2000COD12000～25000MLVSS1500BOD52500～5500TN320～480TOC3200～6850TP220～320SO2-41200～2500800～1700S2-+HS-90～290900～22001.2　1.UASB10.5L,92mm,1.6m,55℃±1℃..,(FeCl3·6H2O5mg·L-1,CoCl2·6H2O0.5mg·L-1NiCl2·6H2O0.5mg·L-1),NaHCO3pH6.0～6.5.1.3　UASBCOD、(VFA)、MLSSMLVSS.(10cm)MLSSMLVSS.COD、MLSSMLVSS[13].VFA[:GC-8APT/TCD(,);VFA:GC-8APF/FID(,)].H2SH2S(GASTEC,4HH).[14],,-.(SEM,HitachiS-2300).1　Fig.1　Experimentallayout2　2.1　UASB2,2.2　UASBTable2　RunningconditionsoftheUASBreactor/dCOD/mg·L-1/L·d-1COD/kg·(m3·d)-1HRT/d0～35420052.024～174560052.8218～293770053.8230～453710053.5246～57346008.54.01.258～6634850104.5168～8136500106.2182～9029800109.0191～971.38600108.5198～1172125001012.01　　22,、.,,,[2(b)].[2(c)],VFA[2(d)].COD(40%～50%)[2(a)],.20d50%1340　　　　　　272　UASBFig.2　Runningperformanceofthereactor20%,.VFA.45d,,.2,,.68d,UASB.2,,,VFA,COD60%～70%..89d,COD9kg·(m3·d)-1(2),1d,COD60%～70%,.,COD,60%～70%.12kg·(m3·d)-1,.:9kg·(m3·d)-1;5～10mL·(L·min)-1;1d.[3(a)]2mL·(L·min)-1(vup=0.06m·h-1)10mL·(L·min)-1(vup=0.25m·h-1),,,MLVSS60d48.2g·L-193d42.3g·L-1.30mL·(L·min)-1(vup=0.8m·h-1),,[2(e)].20d5g·L-1,[2(a)].UASB,,10mL·(L·min)-1.2.2　UASB,,,(S2-+HS-)(H2S).,H2S.,2,1,S2-;2,H2S,H2S.13417　　　　　　,UASB,.,H2S25000mL/m3,,,,、、.3(b).3,1,,.,10000mL/m3.,、、3(c).、,,.3(c),,[3(a)].3,.UASB,,.,.2.3　,.,,.,[17],,.(SO2-4,SO2-3,S2-).,.,,.,2.[4(a)],60d,[　　　　3　Fig.3　Variationofaerationrateandthesulfurcompoundsdischargedfromthereactor4(b)],,,Santegoeds[15]-,.,,[4(c)],,.,,.Zimoter[9].,,.,,.2.4　、1342　　　　　　27　　　　　(a)　　　　　　　　　　　　　　　(b)　　　　　　　　　　　　　　　(c)4　Fig.4　SEMobservationofthemicroorganismsinthegranularsludge.,[16],,.,,VFA,COD,.、()(5).5　、Fig.5　Variationofligninandcellulose&hemicelluloseinthewastewater[5(b)],1d,50%60%.20%,.[5(a)],,60%～70%,20%～40%(20%～30%0).,(),,.3　(1),.UASB,2,COD,40%～50%60%～70%.(2),..(3),COD..:[1]FerryJG.Biochemistryofmethanogenesis[J].CriticalReviewinBiochemistryandMolecularBiology,1992,27:473～503.[2]FlorencioL,FieldJA,LettingaG.Importanceofcobaltforindividualtrophicgroupsinananaerobicmethanoldegradingconsortium[J].Appl.Environ.Microbiol.,1994,60:227～234.13437　　　　　　[3]SchonheitP,KristjanssonJK,ThauerRK.Kineticmechanismfortheabilityofsulfatereducerstoout-competemethanogensforacetate[J].Arch.Microbiol.,1982,132:285～288.[4]OudeElferinkJWHS,VisserA,HulshoffPolLW,etal.Sulfatereductioninmethanogenicbioreactors[J].FEMSMicrobiol.Rev.,1994,15:119～136.[5]GenschowE,HegenannW,MaschkeC.Biologicalsulfateremovalfromtannerywastewaterinatwo-stageanaerobictreatment[J].Wat.Res.,1996,30(9):2072～2078.[6]PeterF,Venkatraghavan,Venkatasubbiah.Coupledanaerobic/aerobictreatmentofhigh-sulfatewastewaterwithsulfatereductionandbiologicalsulfideoxidation[J].Wat.Sci.Tech.,1996,34(5-6):359～366.[7].Fe(OH)3[J].,1999,19(6):493～495.[8]ImaiT,UkitaM,SekineM,etal.TreatmentcharacteristicsofhighstrengthfermentationwastewaterconsistingofhighsulfateandammoniabyUAHBProcess[J].Wat.Sci.Technol.,1998,38(8/9):377～384.[9]ZitomerDH,ShroutJD.High-sulfate,high-chemicaloxygendemandwastewatertreatmentusingaeratedmethanogenicfluidizedbeds[J].WaterEnviron.Res.,2000,72(1):90～97.[10]LensPN,DePoorterMP,VerstraeteWH,etal.Sulfatereducingandmethaneproducingbacteriainaerobicwastewater　　　　treatmentsystems[J].Wat.Res.,1995,29(3):871～880.[11]VisserA,AlphenaarPA,GaoY,etal.Granulationandimmobilizationofmethanogenicandsulfate-reducingbacteriainhigh-rateanaerobicreactors[J].Appl.Microbiol.Biotec