沸石床多级生物膜焦化废水处理系统的NH4N去除稳定性研究赵文涛

NH+4-N,＊,,,(,,　100084):NH+4-N,NH+4-N,NH+4-N,、.,NH+4-N≤0.21kg(m3·d)、COD≤1.35kg(m3·d),NH+4-NCOD(2.2±1.2)mgL(228±60)mgL,(99.1±0.5)%(86.0±2.6)%.、NH+4-N[0.03kg(m3·d)0.06kg(m3·d)],NH+4-N99.0%92.9%,96.8%89.3%,NH+4-N.(CN)(N),NNH+4-NCN2～8.1×103、1×103～1×104、1×104TOC227.6、104.835.0mgL,TOC31.2、22.931.5mgL,1×1031×103～1×1042,1×103.:;;;NH+4-N;:X703.1　:A　:0250-3301(2009)02-0594-06:2008-01-10;:2008-05-10:(50725827):(1979～),,,-,E-mail:[e-mail]＊,E-mail:[e-mail]+4-NRemovalStabilityofZeoliteMediaPackedMultistage-BiofilmSystemforCoke-PlantWastewaterTreatmentZHAOWen-tao,HUANGXia,HEMiao,ZHANGPeng-yi,ZUOChen-yan(StateKeyJointLaboratoryofEnvironmentalSimulationandPollutionControl,DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Thepracticalammoniastrippingeffectivenessofcoke-plantwastewatertreatmentmayvarywidely,andhighNH+4-NshockloadingwillleadtothefluctuationofresidualNH+4-Nconcentrationofbiologicaleffluent.Azeolitemediapackedmultistage-biofilmsystem(ZMBS)wasusedforcoke-plantwastewatertreatmentforenhancingtheNH+4-Ntreatmentabilityofthebio-systemtoshockloading,aswellasachievinghighCODremovalefficiency.Treatmentperformanceduringsteady-stateandshockloadingandtransformationoforganicpollutantsinthesystemwereinvestigatedsystematically.TheexperimentresultsindicatedthatwhenthesystemwasoperatedatNH+4-Nloading≤0.21kg(m3·d)andCODloading≤1.35kg(m3·d),theaverageeffluentNH+4-NandCODconcentrationswere(2.2±1.2)mgL,(228±60)mgLwithaverageremovalefficienciesof(99.1±0.5)%and(86.0±2.6)%.DuringthetwiceNH+4-Nshockloadings[0.03kg(m3·d)and0.06kg(m3·d)],ZMBSshowedastrongresistingabilitywithaverageremovalefficienciesof99.0%and92.9%higherthanthoseofacomparedsystem's96.8%and89.3%.BymonitoringthechangeofwaterqualityalongthelengthoftheZMBS'scells,twofunctionzonesfordifferentpollutantremovalwerefoundtoexist,namedasdecarbonizationnitrification(CN)zoneandnitrification(N)zone,andtheNH+4-NremovalrateinNzonewas2-8timesasthatinCNzone.TOCconcentrationsoforganicmatterswithrelativemolecularweight1×103,1×103to1×104,and1×104,were227.6,104.8and35.0mgLinrawwastewater,and31.2,22.9and31.5mgLintheeffluent,respectively.Organicmatterswithrelativemolecularweight1×103and1×103to1×104inrawwastewaterwereremovedeffectivelybyZMBS,butthosewithrelativemolecularweight1×103werethemainremainedsubstancesintheeffluent.Keywords:coke-plantwastewater;zeolite;multistage-biofilmsystem;NH+4-Nremovalstability;molecularweightdistribution　　、.、,[1～3].:NH+4-N、、、、[4～6].,、,30220092　　　　　　ENVIRONMENTALSCIENCEVol.30,No.2Feb.,2009DOI:10.13227/j.hjkx.2009.02.043AOA1A2O[7～12].,,,NH+4-N.,,,[13～16].,,NH+4-N.NH+4-N,NH+4-N,.,、NH+4-NCOD.NH+4-NCODNH+4-N,.1　1.1　1.84.8L,8.3～5cm(),2248kgm3,944kgm3.42.0%.、(305d),,218d.A1A2O1O2O3O4O5O6(A1,A2,O1～O6),,O6A1A2,3.(HRT)40h,27～33℃,DO2～6mgL.A1A2O,,.,pH7.0～7.5.1.2　COD、NH+4-N[17].TOC(SHIMADZUTOC-5000A,).(MILLIPORE,StirredCellHM).1.;2.;3.;4.;5.;6.pH;7.Na2CO3;8.;9.;10.;11.1　Fig.1　Diagramofzeolitemediapackedmultistage-biofilmsystemGC-MS,,[18].2　2.1　NH+4-NCOD,NH+4-N、COD,2.2(a),NH+4-N≤0.21kg(m3·d),NH+4-N,98%,(2.2±1.2)mgL,(15mgL)(GB8978-1996).0.21kg(m3·d),NH+4-N,15mgL.,NH+4-N,NH+4-N.2(b),COD,COD≤1.35kg(m3·d),91.1%,,.COD(228±60)mgL,(GB8978-1996).2.2　NH+4-N,2NH+4-N,A1A2O.,NH+4-N0.17kg(m3·d)0.20kg(m3·d),0.03kg(m3·d)(NH+4-N50mgL);,NH+4-N0.13kg(m3·d)0.19kg(m3·d),5952:NH+4-N　　　2　NH+4-NCODNH+4-NCOD、Fig.2　RelationshipsoftheinfluentNH+4-NandCODloadingrateswiththeeffluentNH+4-NandCODconcentrationsandremovalefficiencies0.06kg(m3·d)(NH+4-N100mgL).NH+4-N3.,,NH+4-N,NH+4-N.,NH+4-N,NH+4-N,15mgL,A1A2ONH+4-N,15mgL.,,NH+4-N(0.318mgg),[19,20],NH+4-N,,NH+4-N[21,22].,(403～408d),NH+4-N,408dNH+4-N15mgL,.,,NH+4-N,NH+4-N,,.3　NH+4-NFig.3　ChronologicalcurvesofNH+4-Nconcentrationsduringtheweakandstrongshockloadings　　2NH+4-N99.0%、92.9%,96.8%、89.3%,COD().,596　　　　　　30,0.03kg(m3·d),NH+4-N,NH+4-N.2.3　4CODNH+4-N.3A1、A2,A1,.4(a),CODO1、O2,406dO1、O2COD56.9%,.O2COD.NH+4-N2.O1、O2,NH+4-N.406、505、522dNH+4-N0.04、0.10、0.15kg(m3·d).406、522dO3、O4、O5,505dO3、O4,NH+4-N.406、505、522dNH+4-N0.34、0.34、0.33kg(m3·d).NH+4-N,,2～8.,,,,、[23,24];,,,,NH+4-N.Chudoba[25],,,.CODNH+4-N,4　CODNH+4-NFig.4　CODandNH+4-Nreductionalongreactorcells,,(CN),,(N).NNH+4-NCN.NH+4-N,,NH+4-N,NH+4-N.2.4　,TOC(5)GC-MS.5,1×103、1×103～1×104、1×104TOC227.6、104.8、35.0mgL,TOC62.0%、28.5%9.5%.1×103,GC-MS、、、、、,[1,8].,,,[23].,CN,N,NH+4-N.,5972:NH+4-N　　5　TOCFig.5　Relativemolecularweightdistributionsoforganiccompounds(TOC)inrawwastewaterandzeolitesystemeffluent1×103,GC-MS,,.1×103、1×103～1×104、1×104TOC31.2、22.9、31.5mgL,TOC36.5%、26.7%36.8%.,1×1031×103～1×1042,1×104TOC.1×103,GC-MS;1×103,,.3　(1),NH+4-N≤0.21kg(m3·d)、COD≤1.35kg(m3·d),NH+4-NCOD(2.2±1.2)mgL(228±60)mgL,(99.1±0.5)%(86.0±2.6)%.(2),A1A2O.2,NH+4-N99.0%、92.9%;A1A2O96.8%、89.3%.(3),2:CNN.CNCOD,NH+4-N;NCOD,NH+4-N,CN2～8.NH+4-NNH+4-N.(4)1×103、1×103～1×104、1×104TOC227.6、104.8、35.0mgL,TOC62.0%、28.5%9.5%.1×103、1×103～1×104、1×104TOC31.2、22.9、31.5mgL,TOC36.5%、26.7%36.8%.1×1031×103～1×1042,1×103.:[1]　ZhangM,TayJH,QianY,etal.Cokeplantwastewate