SBR工艺处理高质量浓度尿素废水短程硝化特性李伟光

41　220092　　　　　　　　　JOURNALOFHARBININSTITUTEOFTECHNOLOGY　Vol.41No.2Feb.2009　　　　　　SBR李伟光1,闫立龙1,2,李　娟1,傅文博1(1.,150090;2.,150030)　:为实现短程脱氮技术处理高质量浓度尿素废水,通过采用SBR工艺考察反应过程中pH、曝气时间、尿素容积负荷对高质量浓度尿素废水短程硝化特性的影响.结果表明:用SBR工艺处理高质量浓度尿素废水效果稳定,出水中含有大量的亚硝酸氮,发生了短程硝化;当pH在7～10的范围内时,亚硝酸盐积累率均在90%以上;在试验条件下,曝气时间对短程硝化过程影响不大,尿素水解反应成为限速步骤;尿素容积负荷没有影响亚硝酸盐氮的积累率,当进水尿素容积负荷控制在1.13kg/(m3·d)以下时,能够获得较高的尿素去除率和氨氮转化率.高浓度尿素废水处理中短程硝化脱氮过程更容易实现.:尿素;短程硝化;SBR;pH:X703.1:A:0367-6234(2009)02-0061-05Short-cutnitrificationcharacteristicsintreatingwastewaterwithhigh-concentrationureawithSBRLIWei-guang1,YANLi-long1,2,LIJuan1,FUWen-bo1(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.SchoolofResourceandEnvironment,NortheastAgriculturalUniversity,Harbin150030,China)Abstract:Inordertoachievenitrogenremovalvianitritedirectlyintreatingwastewaterwithhigh-concentra-tionurea,theinfluencesofpHvalue,aerationtimeandCO(NH2)2volumeloadingontheshort-cutnitrifi-cationcharacteristicswereinvestigatedusingSBR.Theresultsshowedthefeasibilitytotreatwastewaterwithhigh-concentrationureabyusingSBR.Ureawasconvertedintonitritemostlyintheeffluentandthenshort-cutnitrificationoccurred.ControllingthepHvalueintherangeof7-10,thenitrosationrate(NO2-N/NOx-N)ofmorethan90%wasachieved.Intheexperimentalconditions,aerationtimehadlittleeffectonthenitriteaccumulation,andCO(NH2)2hydrolyzationbecamethelimitstep.TheCO(NH2)2volumeloadinghadnoeffectonthenitriteaccumulation,butwhenitwascontrolledbelow1.13kg/(m3·d),higherCO(NH2)2removalrateandammoniumnitrogentransformationratewereobtained.Itiseasytoachievenitrogenremovalviashort-cutnitrificationintreatingwastewaterwithhigh-concentrationurea.Keywords:urea;short-cutnitrification;sequencingbatchreactor(SBR);pH:2007-04-24.:(1962—),,,.　　,,,SHARON[1]、[2],.,25%,40%,[3].,,.SBR,,pH、,.1　试　验1.1　5SBR(R0～R4),1000mm,150mm,14L,,250mm,1..1　SBR1.2　,:CODcr,1.09～36.4mg/L,,0～1.53mg/L,,0～3.26mg/L,,200～800mg/L,pH7.20～8.52,23～27℃.CODcrr、、.1.3　,R050d、,SBR,R0-R42800～3000mg/L.:MLVSS/MLSS=0.8,15%～25%.SBR,:,8～12h(,),1h,0.5h,,.1.4　:[4];:;:N-(1-)-;:;pH:pHS-3CpH;:DO-14PDO.2　结果与讨论2.1　,()NH3CO2[5],(1)～(4).　　,.8h,R0(、、、),2.2,SBR,,403.46mg/L,56.00mg/L,86.06%,SBR;,,,R0、33.31mg/L、152.82mg/L9.20mg/L,,,.2　R02.2　pH,,pH.,pH.336～440mg/L,23～27℃,2mg/L,20,pH.:R0,4(R0),R1、R2、R3R4.pH,2mol/LNaOH、2mol/LNaHCO31∶10H2SO4R1·62·　　　　　　　　　　　　　　　　　　　　　41　R4pH7、8、9、10,8h,pH,3.3　pH　　3,pH,,,R1R462.23mg/L、73.18mg/L、133.71mg/L261.21mg/L,SBRpH7～8;3,4,,,,4,(NO2-N/NOx-N)90%.:1)pH.An-thonisen[6],.pH,pH,;pH,pH7.0～8.5,pH6.0～7.5,pH,,,,pH,[7,8].2)[9,10].[11],.3)..,,[12],28℃,.,(2mg/L)、(4mg/L)(20～27℃),,,pH.pH,8d,R1R4pH,4.4,pH,1h4pH,4pH8.12、8.18、8.41、9.77,SBRpH.(1)～(4),12NH31CO2,SBR,pH8,NH3,NH3pH,,,pH,R1R2pH;pH9,CO2,CO2CO2,R3R4pH.4,1h,4pH8,pH,[7,8].4　pH2.3　SBR,,.,393.75mg/L,COD35.7mg/L,26℃,pH=7,R1pH,5.5,,,,,,8h,、、96.08mg/L、10.55mg/L、146.49mg/L0.196mg/L;,,,,15mg/L,12h,·63·2,:SBR、、16.33mg/L、4.42mg/L、176.24mg/L0.228mg/L,R195.85%.R1,,.5,,,,CODcr(18h,75.60%,10%),,,;,,CODcr(12h),,,,.[13],,,,,,SBR,.2.4　SBR,SBR,,.,CODcr,,CODcr84.37～100mg/L.,:ρT=(ρin,urea-ρout,urea)×0.467+ρin,A.ρT,mg/L;ρin,urea,mg/L;ρout,urea,mg/L;ρin,A,mg/L;0.467.1.5　pH1　CO(NH2)2kg·(m3·d)-1mg·L-1mg·L-1%NH+4-Nmg·L-1mg·L-1%NO-2-Nmg·L-1NO3--Nmg·L-1NO2-N/NOx--N%0.55183.334.36397.6284.6394.78294.3573.264.41294.321.13376.6748.8587.03156.6630.3980.60119.348.25593.531.63543.3385.1984.32216.6359.4472.56143.8812.2292.172.25750.00161.0078.54278.51131.952.65136.4410.1993.05　　2,,,,.,,,;,,,,,,1.13kg/(m3·d),.3　结　论1)SBR,,,403.46mg/L,56.00mg/L,86.06%.2)SBRpH(pH=7～10),CODcr、·64·　　　　　　　　　　　　　　　　　　　　　41　.3),SBR,,.4)、、,1.13kg/(m3·d),.参考文献:[1]JETTENMSM.Towardsamoresustainablemunicipalwastewatertreatmentssystem[J].WaterSciTech,1997,35(9):171-180.[2]JETTENMS.Theanaerobicoxidationofammonium[J].FEMSMicrobiologyReviews,1999,22(5):421-437.[3]RUIZG,JEISOND,CHAMYR.Nitrificationwithhighnitriteaccumulationforthetreatmentofwastewaterwithhighammoniaconcentration[J].WatRes,2003,37(6):1371-1377.[4],.[J].,2000,17(4):233,241.[5]ROBERA,BURNE,WANYY,etal.Bacterialurea-sesininfectiousdiseases[J].MicrobesandInfection,2000,2:533-542.[6]ANTHONISENAC,LOEHRRC,PRAKASAMTBS,etal.Inhibitionofnitrificationbyammoniaandnitrousacid[J].WaterPollutControlFederation,1976,48:835-843.[7],,.pH[J].,2005,37(7):1664-1666.[8]SUTHERSANS,GANCZARCEZYKJ.Inhibitionofni-triteoxidationduringnitrification:Someobservations[J].WaterPollutRes,1986,21:257-262.[9]GARRIDOJM,BENTHUMvanWAJ,LOOS-DRECHTvanMCM,etal.Influenceofdissolvedoxy-genconcentrationonnitriteaccumulationinabiofilmairliftsuspensionreactor[J].BiotechnolBioeng,1997,53:168-175.[10]BERNETN,PENGD,DELGENESJP,etal.Nitrifi-cationatlowoxygenconcentrationinbiofilmreactor[J].EnvironEng,2001,127:266-272.[11]JAYAMOHANS,OHGAKIS,HANKIK.EffectofDOonkineticsofnitrification[J].WaterSupply,1988,6:141-148.[12],,.[J].,2005,26(1):63-67.[13],.[M].:,1998.(　刘　彤)(60)[2].[J].,2005,30(7):7-10.[3]KENTTD,FITZPATRICKCSB,WILLIAMSSC.Testingofbiologicalaeratedfilter(BAF)media[J].WatSciTech,1996,34(3-4):363-370.[4].[R].:,2006.[5]YUY,FENGY,QIUL,etal.Effectofgrain-slagmedia