UASB反应器对芳香族化合物反硝化降解特性研究全向春

2　12环境工程学报Vol.2,No.12200812ChineseJournalofEnvironmentalEngineeringDec.2008UASB全向春　王文燕　杨志峰　何孟常(,100875)　　、,(UASB),,COD/NO-3-N(C/N)。,COD900mg/L,、60mg/L,NO-3-N20～60mg/L,UASB,COD85%,、90%、81%71%。3。C/N,C/N5～30,87%～92%;C/N,C/N15,82%77%。　　UASB　　　　　X703.1　　　A　　　1673-9108(2008)12-1589-05BiodegradationofaromatichydrocarbonsinanUASBreactorunderdenitrifyingconditionsQuanXiangchun　WangWenyan　YangZhifeng　HeMengchang(StateKeyLaboratoryofWaterEnvironmentalSimulation,SchoolofEnvironment,BeijingNormalUniversity,Beijing100875)Abstract　Withbenzene,naphthaleneandbiphenylasmodelaromatichydrocarbons,treatmentofwastewatercontainingabovearomatichydrocarbonswasstudiedinanupflowanaerobicsludgebed(UASB)reac-toroperatedundercontinuousmodeanddenitrifyingconditions,andtheinfluenceofCOD/NO-3-N(C/N)ratioontheremovaloforganicpollutantswasalsoinvestigatedwithglucoseasthesupplementedcarbonsource.Re-sultsshowedthattheUASBreactorcoulddegradethesearomatichydrocarbonseffectively,withinfluentCODconcentrationatabout900mg/L,totalconcentrationofbenzene,naphthaleneandbiphenylatabout60mg/L,andinfluentNO-3-Nconcentrationranged20～60mg/L.TheaverageremovalrateofCODwas85%,andthatofbenzene,naphthaleneandbiphenylwas90%,81%and71%,respectively.Biodegradationabilityofthethreearomatichydrocarbonsfollowedtheorder:benzenenaphthalenebiphenyl.C/Nratiodidnothaveobvi-ouseffectsontheremovalofbenzene,87%～92%removalefficiencywasachievedforbenzenewithC/Nranged5～30.However,theremovalofnaphthaleneandbiphenylwasgreatlyinfluencedbyC/Nratio,thehighestre-movalrateof82%and77%wasachievedatC/N=15.Degradationofthethreearomatichydrocarbonsfollowedtheorder:benzenenaphthalenebiphenyl.Keywords　denitrification;UASBreactor;degradation;benzene;naphthalene;biphenyl:(50508006):2008-04-10;:2008-05-16:(1973～),,,,。E-mail:[e-mail]　　,、。、、,[1～3]。。,,[4～6]。。,,2。[5～7],,,[8]。UASB,———、,,。1　1.1　(UASB),4.5L,90mm,900mm;170mm,300mm。,,,。,30℃。,。24h。1。1　UASBFig.1　SchematicdiagramofthesetupofUASBreactor1.2　,、,1∶1∶1,,C∶N∶P=200∶5∶1NH4ClKH2PO4,pH7.0～7.4,1。,VSS5.2g/L,VSS/MLSS0.4。1　Table1　Designedaromatichydrocarbons,CODandNO-3-Nconcentrationsinsyntheticwastewater(d)(mg/L)COD(mg/L)NO-3-N(mg/L)1～4307002544～73208002574～996080025100～11610090025117～1286090025129～1716090020～60172～1926090060～220193～22560900601.3　,,COD700mg/L,NO-3-N25mg/L。,1∶1∶1、,,NO-3-N。,NO-3-N20～220mg/L,COD60mg/L900mg/L,COD/NO-3-N(C/N)。,pH,pH6.5～7.8,,、COD、。,,。1.4　、Waters1525(Waters),8μL,∶87∶13(),1mL/min,,254nm。NO-3-NNO-2-NN-(1-)-;COD;MLSS。159012:UASB2　2.1　UASBUASB3,225d。1～128d,;129～225d,COD/NO-3-N(C/N)。COD、NO-3-N2～4。,,、,NO-3-N25mg/L。,COD,91%。44d,、,20mg/L,COD,,,,34　UASBFig.4　RemovalofNO-3-NbyUASBreactoroperatedundercontinuousmode,93%,0.5mg/L。,3。74d,60mg/L,COD,80%～88%,。99d,100mg/L,COD72%,。110d,74%,、,5.7、8.911.7mg/L。,。,117d60mg/L,COD,128d83%80%。,NO-3-N,96%。,,NO-3-N,。129～171d,NO-3-N20～60mg/L,COD85%,,90%、81%71%;172～192d,NO-3-N60～220mg/L,,COD71%,、88%、75%66%。193d,NO-3-N60mg/L,NO-3-N,NO-3-N97%。3:。。,UASB,,,0.3～1mm。159122.2　COD/NO-3-N(C/N),C/N。C/N,,C/N,,。,,NO-3-N,C/N,5。5　C/NFig.5　EffectofC/NondenitrifyingdegradationoforganiccompoundsC/N5～30,,87%～92%,C/N。C/N,。C/N15,,82%77%。C/N430,69%72%,60%64%。CODC/N15,92%,15。Khursheed[3]UASBC/N2-、4-2,4-。C/N,,C/N,5,;C/N4,;3.33,,、,UASB。Her[9]、C/N,(92%～97%)C/N、。[10],,C/N15,。2.3　C/N15,,,6。6　UASBFig.6　Profilesoforganiccompounds,nitrateandnitritechangesalongtheheightofUASBreactor6,,,,。50cm,COD,3。50cm,、80%、74%87%,COD37%,COD3,,。50～90cm,COD,90cm90%。NO-3-N,NO-3-N,NO-2-N。50cm,98%NO-3-NNO-2-N,NO-2-N,NO-2-N,90cm,NO-2-N,。159212:UASB,,COD/NO-3-N=2.86[10,11],58mg/LNO-3-N165.9mg/LCOD,COD918.7mg/L,。COD,(50cm),,。,,,,。3　　(1)UASB,3,COD900mg/L,、60mg/L,NO-3-N20～60mg/L,COD85%,、90%、81%71%。(2),3:。(3)C/N,C/N5～30,87%～92%,C/N,C/N15,,82%77%。[1],..,2001,21(1):42～46[2],,,..,2004,24(5):323～326[3]KhursheedK.,GuptaS.K.Continuousbiotransformationandremovalofnitrophenolsunderdenitrifyingcondition.WaterResearch,2003,37:2953～2959[4]KarlJ.R.,StuartE.S.Anaerobicbiodegradationofnaph-thalene,phenanthrene,andbiphenylbyadenitrifyingen-richmentculture.WaterResearch,2001,35(1):291～299[5]KarlJ.R.,JoanneC.C.S.,RobertA.S.,etal.Anaero-bicnaphthalenedegradationbymicrobialpureculturesun-dernitrate-reducingcondition.AppliedandEnvironmentalMicrobiology,2000,66:1595～1601[6]RobertoA.,LauraP.,JoseL.M.,etal.AnaerobicPAHdegradationinsoilbyamixedbacterialconsortiumunderdenitrifyingcondition.Chemosphere,2005,60:1231～1236[7],,,..,2007,27(6):968～972[8]QuanX.C.,WangW.Y.,YangZ.F.,etal.ContinuousremovalofaromatichydrocarbonsbyanAFreactorunderdenitrifyingconditions.WorldJ.Microbiol.Biotechnol.,2007,23:1711～1717[9]HerJ.J.,HuangJ.S.InfluencesofcarbonsourceandC/Nratioonnitrate/nitritedenitrificationandcarbonbreak-through.BioresourceTechnology,1995,54:45～51[10],,..,2005,31(3):51～54[11]..,1998,26(3):124～1261593