DO对膜生物反应器中同步硝化反硝化的影响陈超

上海理工大学学报　31　6J.UniversityofShanghaiforScienceandTechnologyVol.31　No.6　2009　　　:1007-6735(2009)06-0581-04　:2008-06-11　:　(1986-),,.　E-mail:[e-mail]陈　超,　徐国勋,　曾林慧,　吴晓坤(,　200093):采用人工配制的生活污水作为原水,考察了在膜生物反应器(MBR)中不同溶解氧(DO)对于同步硝化反硝化效果的影响.结果表明,将试验条件控制在TN容积负荷为0.35kgN/(m3·d)、HRT为6h、SRT为30d、pH为7～8、温度为25～28℃、C/N为9时:在反应器DO的质量浓度为0.6mg/L条件下,可获得62.5%的NH+4-N去除率、91.1%的反硝化率和58.3%的SND率;在反应器DO的质量浓度为1.0mg/L条件下,可获得90.8%的NH+4-N去除率、90.4%的反硝化率和82.5%的SND率;在反应器DO的质量浓度为1.4mg/L时,可获得93.3%的NH+4-N去除率、77.0%的反硝化率和72.1%的SND率.:膜生物反应器;DO;硝化;反硝化;同步硝化反硝化:X502　　　:AInfluenceofdissolvedoxygenonsimultaneousnitrificationanddenitrificationinmembranebioreactorCHENChao,　XUGuo-xun,　ZENGLin-hui,　WUXiao-kun(CollegeofEnvironmentandArchitecture,UniversityofShanghaiforScienceandTechnology,Shanghai200093,China)Abstract:Theman-madedomesticwastewaterwasusedasrawwatertoinvestigatetheeffectsofdiffer-entamountofdissolvedoxygenonthesimultaneousnitrificationanddenitrification(SND)inthemem-branebioreactor.Theresultshowsthatundertheexperimentconditionsofvolumetricloading0.35kgN/(m3·d),hydraulicretentiontime(HRT)6h,sludgeretentiontime(SRT)90d,pHvalue7～8,tem-perature25～28℃,carbon/nitrogen(C/N)9,forDOof0.6mg/Linthebioreactor,removalratesofNH+4-N,denitrification,SNDare62.5%,91.1%and58.3%,respectively;forDOof1.0mg/Linthebioreactor,thoseare90.8%,90.4%and82.5%,respectively;andforDOof1.4mg/Linthebioreactor,thoseare93.3%,77.0%and72.1%,respectively.Theseeffectscanbeexplainedthroughtheanoxicmi-cro-environmentexistinginthemicrobiologicfloc.Keywords:membranebioreactor;dissolvedoxygen;nitrification;denitrification;simul-taneousnitrificationanddenitrification　　,,.,、DOI:10.13255/j.cnki.jusst.2009.06.008　　　　　　　200931　、、.、.(SND),、、[1];MBR,,、、[2].,,..1　1.1　,COD350mg/L,35mg/L,40mg/L.();()(NH+4-N),(、NOx-N),,、、.1.2　a.1.,,MBR,MBR,MBR,.,,,“8min,2min”[3].1　Fig.1　Schematicdiagramofexperimentalequipmentb.320mm×230mm×670mm,,1.1　Tab.1　Specificationofmembranemodule/(mm×mm)/mm/mm/m250×300.50.81.0c.2,,3,3.2　Tab.2　Operatingdataofexperimentalset-upρCOD/(mg·L-1)350ρNH+4-N/(mg·L-1)35ρTN/(mg·L-1)40t/℃25～28TNV/(kgN·m-3·d-1)0.35Ts/d903　3Tab.3　ExperimentalconditionsofthreeprocessesⅠⅡⅢρDO/(mg·L-1)0.61.01.4C/N999pH7～87～87～8t/℃25～2825～2825～28TNV/(kgN·m-3·d-1)0.350.350.35Ts/d303030TH/h666ρs/(g·L-1)6.68.08.61.3　COD、NH+4-N、NO-2-N、NO-3-N、TN、DO,4.4　Tab.4　AnalysisitemsandmethodsCOD[4]HachNH+4-N[4]722NNO-2-NN-(1-)-UV757CRTNO-3-N722NTN-[3]722NDO,WTWoxi315i582　6　,:DO　2　2.1　NH+4-NTN3:、.,..(DO),DO,;DO,,.DO2mg/L,.,,,MBR.MBR80%,,,,,.DO,,.[5],,DO0.5～2mg/L.3DO,0.6,1.0,1.4mg/L,.NH+4-NTNρT2.,、、.,.[(TN-NOx-N)-(TN-NOx-N)]/(TN-NOx-N)100%(1)(TN-TN)/(TN-TN+NOx-N)100%(2)(SND)(TN-TN)/TN100%(3),TN.2,DO,NH+4-NDO,DO1.4mg/L,99%.,TNDO1.0mg/L82.5%,DO,.,DO,,.,,NH+4-N;DO,,,,TN.,,1.0mg/LMBRDO.2　NH+4-NTNFig.2　VariationofNH+4-NandTNamongⅠ～Ⅲprocesses2.2　DO3,3(),DO,MBRv.3,DO,,,SND.583　　　　　　　200931　.DO(DO0.6mg/L),.(91.1%),,NH4+-N(62.5%),TN(SND58.3%).,DO(DO1.4mg/L),,,,,,;DOCOD,,MBR(77.0%),TN(SND72.1%).DO,,SND.3　DOMBRSNDCODFig.3　InfluencedegreeofSNDandCODinMBRbyDO,DO,COD.,.3　　a.,DO1.0mg/L,C/N9、TN0.35kgN/(m3·d)、HRT6h、SRT30d、pH7～8、25～28℃,(90.8%、90.4%),SND(82.5%).b.,DO,,,SND,DO,,;DOSND,DO,SND..c..:[1]　POCHANAK,KELLERJ.Studyoffactorsaffectingforsimultaneousnitrificationanddenitrification(SND)[J].WatSciTech,1999,39(6):61-68.[2]　,.MBRDO/[J].,2001,17(6):10-14.[3]　,,.[J].,2003,19(7):7-11.[4]　.[M].4.:,2002.[5]　,,.[J].,2006,7(4):128-131.584