高氨氮味精废水的亚硝化反亚硝化脱氮研究方士

:0253-2468(2001)-01-0079-05　　　:X703　　　:A/方　士1,李筱焕2　(1.,　310029;2.,　310013):SBR./.,/.SBRⅠ,,./(FA).:/;SBR;AstudyonremovingnitrogenfromhighlynitrogenousMGwastewaterwithprocessofshortenednitrification/denitrificationFANGShi1,LIXiaohuan2　(1.Dept.ofenvironmentalEngineering,ZhengjiangUniversity,Hangzhou310029;2.Metallur-gicalEnvironmentalProtectionInstituteofZhejiangProvince,Hangzhou310013)Abstract:ThediluteN-richmonosodiumglutamate(MG)wastewaterwastreatedbytwo-stageSBRprocess.Theprocesscanbedivid-edintocarbonoxidationstageandthreeshortenednitrification/denitrificationstages.ThepathwayofnitrogenremovalfromN-richMGwastewaterwasprovedtobeviastrippingwithcarbonoxidationstageandshortenednitrification/denitrificationsubsequently.Inthecarbonoxidationstage,DOwasconsumedbyhighconcentrationsoforganiccompoundsothatnitrificationwasrepressed,Inhibi-tionofnitriteoxidationbyfreeammonia(FA)resultedintheformationofshortenednitrification/denitrificationprocess.Keywords:two-stageSBR;highlynitrogenouswastewater;shortenednitrification/denitrification:1999-12-27;:2000-05-16:　(1945—),,().22.(NH+4)(NO-2),(NO-3).2:2NH+4+3O22NO-2+2H2O+4H+(1)2NO-2+O22NO-3(2).(),NO-2-NNO-3-NN2N2O..,N5+N3+(),O2-H2OOH-,.:NO-2+3H+()1/2N2+H2O+OH-(3)NO-3+5H+()1/2N2+H2O+OH-(4)SBR(SequencingBatchReactor)、21120011　　　　　ACTASCIENTIAECIRCUMSTANTIAEVol.21,No.1Jan.,2001DOI:10.13671/j.hjkxxb.2001.01.016,/./NNH+4NO-2,N./N/N,N[1—3]:1.(1)(2),/N/N25%.2.,C.(3)(4)60%C,40%C.,C/N2.86∶1,1.71∶1,C/N.3.,N./NNNO-2-NNO-3-N,NO-3-NNO-2-N,.,Charles[4],,C,.N,C,.1　1.1　,CODCr35000—65000mg/L.,(PAS),CODCr20000—30000mg/L,NH+4-N5000—6000mg/L.,SBR,CODCr5000—6000mg/L,NH+4-N1200—1300mg/L.1.2　SBR20L、、.14L,(DKY-OIS)(),7312,.1.1　SBRFig.1　DiagramofSBRexperimentalprocess1.3　SBRSBRSBR,SBRⅠ、SBRⅡ,SBRⅠ,SBRⅠSBRⅡ.SBR,::,8L14L;:(O)、(A),:　　:2h;:0.5h,8L;:5.5h.1.4　[5],CODCr:;NO-2-N:α-;SS:;NH+4-N:80　　　　　　　　　　21;pH:pHs-W;NO-3-N:;MLSS:;DO:.SBRⅠ　　　0h　　　　　　　　12h　　　16hSBRⅠ　　　　0h　　4h　　8h　　12h　　16h　　(A)　(O)　　2　SBRA/OFig.2　Timesettinginreactionstage2　、.50.25%—30%75%.,,SBR/.SBRⅠ7h,//Ⅰ;SBRⅡ//Ⅱ/Ⅲ.,SBR,.SBR,CODCr94%～96%,NH+4-N80%—90%.SBRN.2.1　SBRNSBRⅠpH7.2—7.6,SBRⅡpH8.0—8.4NH+4-N.NO-x-N、NO-2-N3、4.3　SBRⅠFig.3　NH+4-N,NOx-NandNO-2-Npro-filesinsequencingbatchreactorⅠ4　SBRⅡFig.4　NH+4-N,NOx-NandNO-2-NprofilesinsequencingbatchreactorⅡ　　3SBRⅠ,7hNH+4-N,NO-x-N、NO-2-N,.,,,NH+4-N,,.,.SBRⅠ5,6.5DO-t,SBRⅠ5h,DO0.3mg/L,DO.,,.,811　:/,DO0.5mg/L,.,,,.6,0.325kg/(kg·d)0.8mg/L,.5　DOFig.5　VariationofDOinreactionStageofsequencingbatchreactofI6　DOFig.6　DOprofilesviasludgeloadinginreactionstageofse-quencingbatchreactorI　　3/,,NH+4-NNO-x-N、NO-2-N,,NH+4-N,NO-x-NNO-2-N.,2NO-2-NNO-x-N,NO-x-NNO-3-N,NO-x-NNO-2-N,NH+4-NNO-2-N,NO-2-NNO-3-N.,,NO-3-NNO-2-N.,NNN/N.NO-2-NNO-x-N,,NO-3-N,N/.NO-2-NN,NH+4-N,.Anthonison[6](FA),,FA.:NH3+H2ONH+4+OH-(5)pH,FA(6).[FA]=1714×[NH+4-N]×10pHKb/Kw+10pH(6)Kb:;Kw:.Amthonision10—150mg/L,0.1—1.0mg/L.SBRⅠINH+4-N800—1100mg/L,SBRⅡNH+4-N100—600mg/L.(6)AnthonisionFApH、NH+4-NFA.7,SBRⅠ,NH+4-N800—1100mg/L,pH82　　　　　　　　　　217　FAFig.7　AreaofNitromnasrepressedbyfreeammonia(FA)5.4—6.8.SBRⅡ,pH5.8—7.2.,pH2pH,FA.,,NH+4-N(700-1200mg/L),pHNH+4-NFA,,NO-2-N,,,,NO-3-N.,NN.2.2　SBRNSBR1.1,CODCr,NH+4-N,.1　SBRTable1　OperationalpropertiesofSBRinsteadystageCODCr,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)(0.1～1mg/L),,/.(4)/,80%.:[1]　,.[J].,1994,20(4):230—235[2]　Wong-chongGM,LoehrRC.Kineticsofmicrobialnitrification:nitrite-nitrogenoxidation[J].WatRes,1978,12(8):605—609[3]　MurrayI,etal.Inter-relationshipsbetweennitrogenbalance,pHanddissolvedoxygeninanoxidationditchtreatingfarmanimalwaste[J].WatRes,1975,9(1):25—30[4]　CharlesG,JoannS.Denitrificationkineticsofhighnitrateconcentrationwater:pHeffectoninhibitionandnitriteaccumula-tion[J].WatRes,1998,32(3):831—839[5]　.[M].:.1989[6]　AnthonisenAC,etal.Inhibitionofnitrificationbyammoniaandnitrousacid[J].JWPCF,1976,48(5):835—852831　:/