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:025322468(2001)20120079205:X703:A/1,2(11,310029;21,310013):SBR./.,/.SBR,,./(FA).:/;SBR;AstudyonremovingnitrogenfromhighlynitrogenousMGwastewaterwithprocessofshortenednitrification/denitrificationFANGShi1,LIXiaohuan2(1.Dept.ofenvironmentalEngineering,ZhengjiangUniversity,Hangzhou310029;2.Metallur2gicalEnvironmentalProtectionInstituteofZhejiangProvince,Hangzhou310013)Abstract:ThediluteN2richmonosodiumglutamate(MG)wastewaterwastreatedbytwo2stageSBRprocess.Theprocesscanbedivid2edintocarbonoxidationstageandthreeshortenednitrification/denitrificationstages.ThepathwayofnitrogenremovalfromN2richMGwastewaterwasprovedtobeviastrippingwithcarbonoxidationstageandshortenednitrification/denitrificationsubsequently.Inthecarbonoxidationstage,DOwasconsumedbyhighconcentrationsoforganiccompoundsothatnitrificationwasrepressed,Inhibi2tionofnitriteoxidationbyfreeammonia(FA)resultedintheformationofshortenednitrification/denitrificationprocess.Keywords:two2stageSBR;highlynitrogenouswastewater;shortenednitrification/denitrification:1999212227;:2000205216:(1945),,().22.(NH+4)(NO-2),(NO-3).2:2NH+4+3O22NO-2+2H2O+4H+(1)2NO-2+O22NO-3(2).(),NO-22NNO-32NN2N2O..,N5+N3+(),O2-H2OOH-,.:NO-2+3H+()1/2N2+H2O+OH-(3)NO-3+5H+()1/2N2+H2O+OH-(4)SBR(SequencingBatchReactor)21120011ACTASCIENTIAECIRCUMSTANTIAEVol.21,No.1Jan.,2001,/./NNH+4NO-2,N./N/N,N[13]:11(1)(2),/N/N25%.21,C.(3)(4)60%C,40%C.,C/N21861,1.711,C/N.31,N./NNNO-22NNO-32N,NO-32NNO-22N,.,Charles[4],,C,.N,C,.11.1,CODCr3500065000mg/L.,(PAS),CODCr2000030000mg/L,NH+42N50006000mg/L.,SBR,CODCr50006000mg/L,NH+42N12001300mg/L.1.2SBR20L.14L,(DKY2OIS)(),7312,.1.1SBRFig.1DiagramofSBRexperimentalprocess1.3SBRSBRSBR,SBRSBR,SBR,SBRSBR.SBR,::,8L14L;:(O)(A),::2h;:0.5h,8L;:5.5h.1.4[5],CODCr:;NO-22N:2;SS:;NH+42N:0821;pH:pHs2W;NO-32N:;MLSS:;DO:.SBR0h12h16hSBR0h4h8h12h16h(A)(O)2SBRA/OFig.2Timesettinginreactionstage2.50.25%30%75%.,,SBR/.SBR7h,//;SBR///.,SBR,.SBR,CODCr94%96%,NH+42N80%90%.SBRN.2.1SBRNSBRpH7.27.6,SBRpH8.08.4NH+42N.NO-x2NNO-22N34.3SBRFig.3NH+42N,NOx2NandNO-22Npro2filesinsequencingbatchreactor4SBRFig.4NH+42N,NOx2NandNO-22Nprofilesinsequencingbatchreactor3SBR,7hNH+42N,NO2x2NNO222N,.,,,NH+42N,,.,.SBR5,6.5DO2t,SBR5h,DO0.3mg/L,DO.,,.,181:/,DO0.5mg/L,.,,,.6,0.325kg/(kgd)0.8mg/L,.5DOFig.5VariationofDOinreactionStageofsequencingbatchreactofI6DOFig.6DOprofilesviasludgeloadinginreactionstageofse2quencingbatchreactorI3/,,NH+42NNO-x2NNO-22N,,NH+42N,NO-x2NNO-22N.,2NO-22NNO-x2N,NO-x2NNO-32N,NO-x2NNO-22N,NH+42NNO-22N,NO-22NNO-32N.,,NO-32NNO-22N.,NNN/N.NO-22NNO-x2N,,NO-32N,N/.NO-22NN,NH+42N,.Anthonison[6](FA),,FA.:NH3+H2ONH+4+OH-(5)pH,FA(6).[FA]=1714[NH+4-N]10pHKb/Kw+10pH(6)Kb:;Kw:.Amthonision10150mg/L,0.11.0mg/L.SBRINH+42N8001100mg/L,SBRNH+42N100600mg/L.(6)AnthonisionFApHNH+42NFA.7,SBR,NH+42N8001100mg/L,pH28217FAFig.7AreaofNitromnasrepressedbyfreeammonia(FA)5146.8.SBR,pH5.87.2.,pH2pH,FA.,,NH+42N(700-1200mg/L),pHNH+42NFA,,NO-22N,,,,NO-32N.,NN.2.2SBRNSBR1.1,CODCr,NH+42N,.1SBRTable1OperationalpropertiesofSBRinsteadystageCODCr,mg/LCODCr,mg/LCODCr,%,mg/L,mg/L,%512725894.5133818486.2592827995.2148218797.4501727294.5134215688.4578331894.4150110892.6482520995.7128523182.0493626794.6132320984.2541424595.4139122583.8503626194.8124821482.83(1)SBR3/,,/.(2),,.(3)(FA)(0.11mg/L),,/.(4)/,80%.:[1],1[J]1,1994,20(4):230235[2]Wong2chongGM,LoehrRC.Kineticsofmicrobialnitrification:nitrite2nitrogenoxidation[J]1WatRes,1978,12(8):605609[3]MurrayI,etal.Inter2relationshipsbetweennitrogenbalance,pHanddissolvedoxygeninanoxidationditchtreatingfarmanimalwaste[J]1WatRes,1975,9(1):2530[4]CharlesG,JoannS.Denitrificationkineticsofhighnitrateconcentrationwater:pHeffectoninhibitionandnitriteaccumula2tion[J]1WatRes,1998,32(3):831839[5]1[M]1:.1989[6]AnthonisenAC,etal.Inhibitionofnitrificationbyammoniaandnitrousacid[J]1JWPCF,1976,48(5):835852381:/