SBR法短程深度脱氮过程分析与控制模式的确立杨庆

SBR1,1＊,1,1,2,1(1.,　100124;2.,　100022):SBR,pH.,pH,SBR、,pHTN1mgL;,.SBR,18,..:SBR;;pH;:X703.1　:A　:0250-3301(2009)04-1084-06:2008-05-07;:2008-07-01:“”(2006BAC19B03);(PXM2008-014204-050843);“”:(1979～),,,,E-mail:[e-mail]＊,E-mail:[e-mail]ntofControlModesofAdvancedNitrogenRemovalviaNitriteinSBRYANGQing1,PENGYong-zhen1,WANGShu-ying1,GUSheng-bo1,LIUXiu-hong2,LILing-yun1(1.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China;2.BeijingUrbanWaterDrainageGroupLtd.,Beijing100022,China)Abstract:ToachievestableadvancednitrogenremovalvianitriteinSBR,factorsinfluencingpHvariationintreatingrealdomesticwastewaterwereinvestigated.ThecharacteristicpointswerefoundtobeappearedobviouslyonpHprofileatbothendsofammoniaoxidizationanddenitrificationbyanalyzingthemechanismofbiologicalnitrogenremovalandthebalanceofcarbonicacid.UsingpHascontrolparameterinSBRfortreatingdomesticormunicipalwastewaterwithloworganicconcentrationandsuitablealkalinitycouldachieveadvancednitrogenremovalwitheffluentTNbelow1mgL.Moreover,itcouldpreventthedecreaseofnitriteaccumulationratecausingbyexcessiveaeration,whichplaysanimportantroleonthestabilityofadvancednitrogenremovalvianitrite.Basedontheoreticalanalysisandexperimentalstudy,thereal-timecontrolstrategyofadvancednitrogenremovalvianitritewasestablished.Toaccommodatethedifferentwaterqualityandretaintheaccuracyofcontrolstrategy,18adjustablevariablesweresetupincontrolstrategy.Thecontrolstrategyestablishedafoundationfordevelopingcontrolsoftwareandcontrolsystemofadvancednitrogenremovalvianitrite.Keywords:SBR;advancednitrogenremovalvianitrite;pHvalue;controlstrategy　　..,,NO-2-N,NO-3-N.SBRCN,、.,,[1]、[2].,[3]、DO[4]、[2,5],、.Yang[6]、Wang[7],,,,.1　1.1　,,,.30420094　　　　　　ENVIRONMENTALSCIENCEVol.30,No.4Apr.,2009DOI:10.13227/j.hjkx.2009.04.020SCOD176.4mgL,TN69.3mgL,CN3.2,CN.,1.5,,SRT2000mg·L-116d.1.2　SBR,1.,,500mm,20cm,14L.10cm,;;,,;.SBR,,()()pH.1　SBRFig.1　Schematicdiagramofexperimentalset-upinSBRprocess　1.3　DO、pHORPDO、pHORP.DO、pHORPWTW340iDO,pHORP.COD、NH+4-N、NO-2-N、NO-3-NMLSS,TOCTNmultiNC3000TOCTN.2　2.1　,SBR.SBR2,COD、NH+4-N、NO-2-N、NO-3-N,、,、,.、.DO、pH、ORP.、,.DOpH[6].,,ORPpH[6].:①DO,DO0,DO,,.,ORP,,,.②pH,pH,.,,.③DO“”,DO,pH“”,,2,pH,..,ORP,pH.,2,pH,DOORP.2.2　pHpH,,pH.2DO3SBR.,2310854:SBR,(269min、449min),pH“”,pH,pH..:pH,pH、.、,pH.2　3SBRpHFig.2　NitrogenremovalefficiencyandpHvariationinthreestep-feedingSBR　2.2.1　pH,N2,2.C5H7O2N,(1)、(2)、(4);(1)、(3).NH+4+1.38O2+1.98HCO-3AOB0.02C5H7O2N+0.98NO-2+1.89H2CO3+1.04H2O(1)NO-2+0.0025NH+4+0.01H2CO3+0.0025HCO-3+0.4875O2NOBNO-3+0.0025C5H7O2N+0.0075H2O(2)NO-2+0.67CH3OH+0.53H2CO30.48N2+0.04C5H7O2N+1.23H2O+HCO-3(3)NO-3+1.08CH3OH+0.24H2CO30.47N2+0.056C5H7O2N+1.68H2O+HCO-3(4)　　(1)～(4):①NH+4-N,(1),1molNH+4-N2H+H2CO3,pH;(2),,;②,(3)、(4),,pH.③,25%40%.2,pH,pH,pH。2.2.2　pH3:CO2+H2CO3、HCO-3、CO2-3.:CO2+H2OH2CO3(5)　　:H2CO3H++HCO-3(6)HCO-3H++CO2-3(7)　　:CO2+H2OH2CO3H++HCO-32H++CO2-3(8)　　[8]pH,CO2H2CO3δ2(pH=4.5),HCO-3δ1(pH=8.34),CO2-3HCO-3δ0(pH=12.18);pH=6.35[HCO-3]=[H2CO3];pH=10.33[HCO-3]=[CO2-3].pH=8.34,pH8.34,H2CO3,HCO-3CO2-3;pH8.346.35,CO2-3,H2CO3(CO2+H2O)HCO-3,.、,SBRpH,pH6.5～8.3,,(9)～(11).1086　　　　　　30H2CO3H++HCO-3(9)K1=[HCO-3][H+][H2CO3](10)pH=pK1-lg[H2CO3][HCO-3](11)　　(11),pHH2CO3(CO2+H2O)HCO-3.pH,,.,,CO2,CO2,H2CO3,(9),[H+],pH.,(NO-2-N)H2CO3HCO-3,pH,NO-2-N,,pH.pH,3“”.SBRpH,H+,CO2.CO2pH,2DO,,,DO,,,,CO2,23,,pH.,.2.2.3　pHSBR,、,、、,pH.,pH,,pH.pH,,.,,.SBRpH.[9],pH.,pH,,pH.pH,[10]、[11]、[12]SBRpH,,.,pH6.5～8.0,.2.2.4　pH,SBR,pH“”,,,,TN1mgL;,,.pH,,.AOB,NOB,NOB,,、.2.3　SBR,pHSBR5,,18,.t1～t16,min.a,b.、、、、5,,,,t1,,,.10874:SBR3　SBRFig.3　Flowchartofreal-timecontrolstrategyinSBR　　　pHpH,t2pH,4～20mApH0～14,AD,,,,,,.pH(dpHdt0)t4t3,,.,a,,,,,.①:t5,,pH,t6(t6t5)pH,pH(dpHdt0)t7t8,.,,.②:,t9,,pH,t10(t10t9)pH,pH(dpHdt0)t12t11,.,t13,t14,t15,()t16..,.1088　　　　　　30,,,.3　(1)pH,DO、ORP,pH,,.(2),SBR、,pHTN1mgL;,.(3)pHSBR,,18,..:[1]　HellingaC,SchellenAAJC,MulderJW,etal.TheSHARONprocess:aninnovativemethodfornitrogenremovalfromammonium-richwastewater[J].WaterSciTechnol,1998,37(9):135-142.[2]　PengYZ,ZhangSJ,ZengW,etal.Organicremovalbydenitritationandmethanogenesisandnitrogenremovalbynitritationfromlandfillleachate[J].WatRes,2008,42(4-5):883-892.[3]　BalmelleB,NguyenKM,CapdevilleB,etal.StudyofFactorsControllingNitriteBuild-upinBiologicalProcessesforWaterNitrification[J].WatSciTechnol,1992,26(5-6):1017-1025.[4]　RuizG,JeisonD,ChamyR.Nitrificationwithhighnitriteaccumulationforthetreatmentofwastewaterwithhighammoniaconcentration[J].WatRes,2003,37(6):1371-1377.[5]　KimDJ,KimSH.Effectofnitriteconcentrationonthedistributionandcompetitionofnitrite-oxidizingbacteriainnitratationreactorsystemsandtheirkineticcharacteristics[J].WatRes,2006,40(5):887-894.[6]　YangQ,PengYZ,LiuXH,etal.NitrogenRemovalviaNitriteformMunicipalWastewateratLowTemperaturesusingreal-timeControltoOptimizeNitrifyingCommunities[J].EnvironSciTechnol,2007,41(23):8159-8164.[7]　WangSY,GaoDW,PengYZ,etal.AlternatingShortcartNitrification-DenitrificationforNitrogenRemovalfromSoybean