MBR工艺短硝化反硝化处理生活污水的研究蒋燕

1　3环境工程学报Vol.1,No.320073ChineseJournalofEnvironmentalEngineeringMar.2007MBR蒋　燕　陶冠红*(,215123)　　,(25～30℃),-,,0.15m3/h,pH7～8,COD100mg/L(49mg/L),5.0mg/L(3.1mg/L),NO-2,NO-3,86.2%,94.0%,;pH。　　　　pH　X703.1　　　A　　　1673-9108(2007)03-0062-04Studyonshort-cutnitrificationanddenitrificationindomesticwastewatertreatmentbymembranebioreactorJiangYan　TaoGuanhong(SchoolofChemistryandChemicalEngineering,SuzhouUniversity,Suzhou215123)Abstract　Nitrogenremovalwasstudiedwithamembranereactorinthetreatmentofsimulateddomesticwastewateratmoderatetemperatures(25～30℃).Theshort-cutnitrificationanddenitrificationtechniquewasusedtoeffectivelyremovenitrogen.TheresultsshowedthattheCODofeffluentwassteadilybelow100mg/L(49mg/Lontheaverage),andtheNH+4-Nineffluentwaslessthan5.0mg/L(3.1mg/Lontheaverage).Withthestabilizationofthesystem,theaccumulationofNO-2wasachieved,andNO-3wasnotdetectedvirtuallyintheeffluen.tTheaverageremovalefficiencyoftotalnitrogencouldreach86.2%(94.0%asthemaximum).Itwasalsorevealedthattheprocesswascapableofovercomingshockloadingsoftheinfluents.Inaddition,theaerationflowrateandpHwerethesignificantinfluencingfactorsontheshort-cutnitrification.Keywords　MBR;short-cutnitrificationanddenitrification;aerationflowrate;pH:2006-07-10;:2006-10-25:(1983～),,,。*,E-mail:[e-mail]　　(membranebioreactor,MBR)、,[1],。,———(short-cutnitrificationanddenitrifi-cation)[2],,,。,MBR,[3,4]。,MBR,,、pH2。MBR,,,:,。1　1.1　1,10L,PP,0.1～0.2μm,0.5m2。1.2　,10L,3　:MBR1　Fig.1　Schematicdiagramofmembranebioreactor(25～30℃),,,,,(1mg/L2mg/L)。SBR(5min,10h,2h)。1∶1,10d5∶1,10d10∶1,10d,15d,,。,,,2min1min,8h。。1.3　,、、,、;COD350～450mg/L,40～60mg/L。1.4　COD:(GB11914-1989);NH+4-N:-(GB13580.11-1992);NO-2-N:α-(GB7493-1987);NO-3-N:(GB13580.8-1992);TN:(GB11894-89);MLSS:MLSS(MyratekSentryM-2);DO:(GB7489-1987);pH:pH(Delta320)。2　2.1　3d,,,NO-2-N,(25～30℃)、(2.0mg/L),NO-3-N,NO-x-NNO-2-N。2d1,1,40～50mg/L;2,5∶3,30～40mg/L,50～60mg/L。、TN2。2,,,,27.1mg/L,NO-2-N0.28mg/L,TN35.9%,,,NH+4-N、NOˉ2-N,。2,5mg/L(3.1mg/L);(25～30℃)、pH(7～8)、(2mg/L),,,NO-x-NNO-2-N,NO-3-N。,NO-2-N,[2],,:NH+4+NO-2→N2↑+2H2O,NO-2-N,TN,2,86.2%,94.0%。2　Fig.2　Efficiencyofnitrogenremoval10d,,2350mg/L3320mg/L,631,。35d,3800mg/L,,50d,4000mg/L,,MLSS3500mg/L。,TN,。,,,,,。2,28dNH+4-N,NO-2-N,TN,,,,,,;,56d,,0.2m3/h,,,NO-3-N(5.2mg/L),TN63.9%,,3d。3971d,,NH+4-N,TN46.2%,,,。2.2　COD,、COD3。3　CODFig.3　CODremovalefficiency,COD,COD100mg/L(49mg/L)。4465d,COD,,,,COD。,COD:(1)(3000mg/L);(2),,,,。2.3　,,[5],。3(0.10、0.150.20m3/h),1。1　Table1　Effectofaerationflowrateonnitrogenremoval(m3/h)(mg/L)NH+4-N(mg/L)NO-2-N(mg/L)NO-3-N(mg/L)TN(%)0.101.023.3--48.90.15≈2.03.33.7-85.60.20≈3.01.85.418.140.20.10m3/h,,NH+4-N,NO-2-NNO-3-N,TN48.9%;0.15m3/h,,NH+4-NNO-2-N,NH+4-N,,,2.0mg/L,,,NO-2-N,TN85.6%;0.20m3/h,,,NO-3-N,,TN40.2%。2.0mg/L,。2.4　pHpH,[6]。Na2CO3pH,2pH2。643　:MBR2　pHTable2　EffectofpHonnitrogenremovalpHNH+4-N(mg/L)NO-2-N(mg/L)NO-3-N(mg/L)TN(%)6～714.20.5-65.37～83.33.7-85.6pH,0.15m3/h,,NO-3-N。:2NH+4+3O2→2NO-2+4H++2H2O,pH,,,pH,7～8.5[4]。2,pH7～8,,NO-2-N,TN85.6%。3　　(1)(25～30℃),0.15m3/h,pH7～8,,COD100mg/L(49mg/L),5.0mg/L(3.1mg/L),NO-2,NO-3,TN86.2%,94.0%。、、,,MBR。　　(2)pH,pH,,,。(3),,(),,。(4),,、。[1],.———.:,2002[2]SchmidtI.,eta.lNewconceptsofmicrobialtreatmentprocessesforthenitrogenremovalinwastewater.FEMSMicrobio.Rev.,2003,27:481～492[3],.SMSBR.,2001,17(5):6～11[4]DelgadoS.,eta.lNitrificationinahollow-fibremembranebioreactor.Desalination,2002,146:445～449[5]CiudadG.,eta.lDifferentialkineticsofammonia-andni-trite-oxidizingbacteria:Asimplekineticstudybasedonox-ygenaffinityandprotonreleaseduringnitrification.ProcessBiochem.,2006,41(8):1764～1772[6]AnthonisenA.,eta.lInhibitionofnitrificationbyammoniaandnitrousacid.Wa.tPollu.tControlFed.,1975,48(5):835～85265