不同构型湿地氧分布及脱氮效果对比黄娟

第31卷第6期土木建筑与环境工程Vol.31No.62009年12月JournalofCivil,Architectural&EnvironmentalEngineeringDec.2009黄　娟1,王世和1,钟秋爽2,鄢　璐1(1.东南大学市政工程系,南京210096;2.江苏省建设厅科技发展中心,南京210013):2009-07-05:(50909019,50278016):(1980-),,,,(E-mail)[e-mail]。　:通过2组对比试验(垂直流与水平流湿地、单段式与三段式水平流湿地),考察了不同构型湿地中溶解氧的分布情况及脱氮效果。结果表明:不同构型人工湿地水力流态的区别,导致了床体溶解氧分布和脱氮效果的差异。垂直流人工湿地独特的结构设计和水力流态更有利于湿地内部的供氧,局部氧浓度可比水平流湿地高0.17mg/L;脱氮效果优于相同运行条件下的水平流湿地,NH+4-N、TN去除率分别可提高约9%、5%。三段式水平流湿地通过接触槽内复氧,有效改善了溶解氧分布,利于硝化反应进行,NH+4-N去除率最高达66%,TN去除率最高达71%,分别比单段式湿地提高约8%和5%。此外,三段式湿地在较低水位下运行仍能取得较好的脱氮效果,其最佳停留时间的范围也得以延展。:构型;溶解氧;人工湿地;脱氮效果:X52　　:A　　:1674-4764(2009)06-0117-05ComparisonofDissolvedOxygenDistributionandNitrogenRemovalEffectinWetlandswithDifferentStructuresHUANGJuan1,WANGShi-he1,ZHONGQiu-shuang2,YANLu1(1.Dept.ofMunicipalEngineering,SoutheastUniversity,Nanjing210096,P.R.China;2.Technologydevelopmentcenterofreconstructiondepartment,Jiangsuprovince,Nanjing210013,P.R.China)Abstract:Thedissolvedoxygendistributionandnitrogenremovaleffectindifferentstructuresofwetlandswereinvestigatedbytwogroupsofcomparisonexperiments(verticalflowwithhorizontalflow;single-stagewiththree-stagehorizontalflow).Itwasfoundthatthedifferenthydraulicflowpatternsindifferentstructuresofwetlandswouldresultindifferentoxygendistributionandnitrogenremovaleffect.Thespecialstructuredesignandhydraulicflowpatternofverticalflowwetlandwerefavorabletoitsdissolvedoxygendistribution,whichcouldincrease0.17mg/Linlocalareathanthatinhorizontalflowwetland.Thenitrogenremovaleffectofverticalflowwetlandwasbetterthanthatofhorizontalflowwetlandinthesameoperationconditions.TheremovalefficiencyofNH+4-NandTNcouldincrease9%and5%respectivelyinverticalflowwetlandthanthatinhorizontalflowwetland.Becauseofreaerationincontactingchannelsofthree-stagewetland,theremovalefficiencyofNH+4-NandTNreached66%and71%respectively,whichimproved8%and5%respectivelythanthatofsingle-stagewetland.Inaddition,three-stagewetlandcouldkeephighernitrogenremovaleffecteveninlowoperationwaterlevel,andtherangeofitsbesthydraulicretentiontime(HRT)wasextended.Keywords:structure;dissolvedoxygen;constructedwetland;nitrogenremovaleffect　　(subsurface-flowconstructedwetlands,SFCWs),、,[1-3]。,,,[4-5]。,、,[6]。,[7-9]。,、、,,。,,。,,[10]。,[11]。,,,。1　1.1　。0.2m(40～60mm),0.3m(20～40mm),0.15m(10～30mm),0.2m。,(Phragmitescommunistrin.)。20037200612,9:00-11:00,2d1。,。1.1.1　垂直流与水平流人工湿地、1、2。2、、3m×1m×0.85m,。2(20cm)、(45cm)(70cm)(0.5m、1.0m、1.5m、2.0m、2.5m)15,。,0.65～0.70m,25～35cm/d。1　2　1.1.2　单段式和三段式水平流湿地,、、13.3m×3.4m×0.85m。2005610(1～10d)(40、60cm),(2004610)。3。3　A、B、C,0.3m,,10.5m,20.35m,,,20cm,AB,。7(),S0,S1、S3、S52m、6.5m11m,S2、S42,S6。,。,,,,。118土木建筑与环境工程　　　　　　　　　　　　　　　　第31卷1.2　,1。1　/(mg·L-1)DOCODCrNH+4-NNO3--NTN0.2～1.2120～30030～650～1045～80《》(4)。2　2.1　2。2　/m/(mg·L-1)/(mg·L-1)0.50.560.500.420.600.540.451.00.410.310.190.430.380.201.50.420.280.130.450.350.302.00.510.320.100.580.400.172.50.430.230.050.470.290.252,20.84mg/L,。、,0.08mg/L。,,,,。,,。2、,,1.5m0.17mg/L。,,,,,。2.2　,。、NH+4-N、TN,4。4　4,,(NH+4-N:t=2.89,P=0.0150.05;TN:t=4.66,P=0.000690.05)。NH+4-N、TN,(68)。,6NH+4-N9%,TN5%。,,。,,。,,。,,[12]。,,。,,,,。,。2.3　3:1,。HRT5～7d,40cm60cm,5。,60cm,0.4mg/L,0,。119第6期黄　娟,等:不同构型湿地氧分布及脱氮效果对比,,。,S2S4,S30.5mg/L。,,,,NH+4-N。5　DO40cm,60cm。0.85m,,,,40cm,;,20～40cm,40cm60cm。,。,。2.440cm60cm,NH+4-NTNHRT6。6,,(60cm,NH+4-N:t=4.49,P=0.00150.05;TN:t=3.77,P=0.00440.05。40cm,NH+4-N:t=4.22,P=0.00230.05;TN:t=5.64,P=0.000320.05)。,NH+4-N。,NH+4-N,。,,,NH+4-N。HRT6～8d,NH+4-N65%,8%。NH+4-N,NH+4-NTN。,,、,TNHRT7d71%,TN5%。6　240cm,NH+4-N、TN58%65%,9%13%。,,,;,,AB,。,,。,HRT5～6d,HRT,HRT4～9d,TN60%。,HRT,,,,HRT,。3　　1),120土木建筑与环境工程　　　　　　　　　　　　　　　　第31卷,。2),。,,NH+4-N9%,TN5%。3),,,NH+4-N66%,TN71%,8%、5%。4)HRT,(40cm),HRT4～9d,TN60%。:[1]MATAMOROSV,PUIGAGUTJ,GARCIAJ,etal.Behaviorofselectedpriorityorganicpollutantsinhorizontalsubsurfaceflowconstructedwetlands:Apreliminaryscreening[J].Chemosphere,2007,69(9):1374-1380.[2]CHRISTINAV,REIMOA,KASPARN,etal.Dynamicsofphosphorus,nitrogenandcarbonremovalinahorizontalsubsurfaceflowconstructedwetland[J].ScienceoftheTotalEnvironment,2007,380:66-74.[3],,,.N、P[J].,2008,29(11):3043-3048.　　YANGCHANG-MING,GUGUO-QUAN,LIJIAN-HUA,etal.ResidencetimedistributionsandspatialvariationofN,Pinthesubsurface-flowconstructedwetlandsforpurificationofeutrophicaquaculturewater[J].EnvironmentalScience,2008,29(11):3043-3048.[4],,,.[J].,2007,33(3):65-68.　　HUANGJUAN,WANGSHI-HE,YANLU,etal.Wastewaterpurificationwiththree-segementsubsurfacewetland[J].TechnologyofWaterTreatment,2007,33(3):65-68.[5],.[J].,2009,35(1):46-53.　　ZHUYU-HUI,TIANGUANG-MING.Experimentalstudyofhybridflowconstructedwetlandstreatingdomesticsewage[J].TechnologyofWaterTreatment,2009,35(1):46-53.[6],,.[J].,2009,25(3):62-66.　　DUXIAO-LI,XUZU-XIN,WANGSHENG.Analysisofnitrogenremovalroutesintwomodifiedverticalsubsurface-flowconstructedwetland[J].ChinaWater&Wastewater,2009,25(3):62-66.[7]VARIGAS,CHONGRAKP.Nitrogenmassbalanceandmicrobialanalysisofconstructedwetlandstreatingmunicipallandfillleachate[J].BioresourceTechnology,2007,98(3):565-570.[8]JEREMYF,DORINB,KELLYAR,etal.Nitrogenremovalfromdomesticwastewateru