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56Vol．5No．620116ChineseJournalofEnvironmentalEngineeringJun．2011510006COD169.19mg/L、TP0.58mg/L、TN5.69mg/LNH+4-N3.69mg/L。86.11%、82.1%、80.3%76.7%、。。。X524A1673-9108201106-1305-05EfficiencystudyofimprovedconstructedwetlandforurbanrunofftreatmentShuZhaohuiMaYongwenHeLijunWanJinquanWangYanTheKeyLabofPollutionControlandEcosystemRestorationinIndustryClustersMinistryofEducationCollegeofEnvironmentalScienceandEngineeringSouthChinaUniversityofTechnologyGuangzhou510006ChinaAbstractAccordingtothecharacteristicsofurbanrunoffinthecatchmentofTongshareservoirDongguanCityGuangdongProvinceanimprovedconstructedwetlandwasemployedtotreatthesimulatedrunoffintermsofpollutantdegradationefficiencyandthecapacityofshockloading．TheaverageconcentrationsofCODTPTNNH+4-Ninsimulatedwastewaterwere169.19mg/L0.58mg/L5.69mg/L3.69mg/Landtheremov-alefficienciesoftheconstructedwetlandssystemwere86.11%82.1%80.3%and76.7%respectively．Theresultsindicatedthatthedegradationprocessbytheconstructedwetlandswasthesynergisticeffectsofphysi-calchemicalandbiologicalprocesses．Thepollutantremovalefficiencydeclinedalongthewaterflowdirec-tionandmostofpollutantswereremovedinthefrontofthesystem．Theresultofexperimentsundershockload-ingsrevealedthattheconstructedwetlandshadastrongresistancetoshockloadinganditcouldbearshort-termloadofhighconcentration．Keywordsconstructedwetlandurbanrunoffnon-pointpollution2008ZX07211-0062010－07－112010－11－091986～。E-mailshuzh311@163．com12。、。、、3。、、、、、、4。5。11.11790mm4—980%。12009、。1Table1QualityofrunoffinthecatchmentofTongshareservoirmg/LCODSSNH+4-NTNTP128．93206．062．053．371．23159．62253．242．834．421．3693．43137．621．963．520．9598．54146．582．374．281．56。1SSCODN、P0.9～3.5mg/L、0.9～1.8mg/L5。。1.2。1．5m1.6m0.8m1%4。0.48m31、、、。。10/m2。。1Fig.1Structureofconstructedwetlands1．32009110．5m3/d、NH4Cl、KNO3、KH2PO4pH20103—6。4—8。1．420103—6、2～3。COD、TN、TP、NH+4-N、pH、DO、。pH、DO、《》46。22.122COD、TN、TPNH+4-N60%。、、7、。COD79.7%～89.2%40mg/LⅣ。603162Table2Pollutantconcentrationsandremovalefficienciesininfluentsandeffluentsoftheconstructedwetlandsmg/Lmg/L%COD126．5～198．7169．1921．4～39．323．579．7～89．286．11TN4．36～5．975．690．96～1．951．1267．3～83．980．3TP0．49～0．680．580．09～0．210．1069．1～86．882．1NH+4-N2．06～3．873．690．67～1．230．8668．2～82．776．72Fig.2Concentrationsofpollutantsininfluentsandeffluentsoftheconstructedwetlands、88%～16%9。TN67.3%～83.9%NH+4-N。NH+4-N。、、。TP82%0.58mg/L。2．23。703153Table3Longitudinalpollutantconcentrationvariationsintheconstructedwetlandsmg/L123COD154．559．842．330．521．4TN5．63．42．21．91．7TP0．590．320．250．140．12NH+4-N3．31．51．21．00．8。、、。3、、。2.39-12。5h。26h、2h3。3COD、TNCODTN5h53.91%5h。20h。3Fig.3Pollutantconcentrationvariationsintheinfluentsandeffluentsundershockloadings3COD、TP、TNNH+4-N86.11%、82.1%、80.3%76.7%。1、803162320h4。1．．20062671057-1061LiLiqingYinChengqingHeQingcietal．Catchment-scalepollutionprocessandfirstflushofurbanstormrunoffinHanyangWuhanCity．ActaScientiaeCircumstantiae20062671057-1061inChinese2．．2008241134-38XiaoHaiwenZhaiJunDengRongsenetal．Perform-anceofconstructedwetlandfortreatmentofstormwaterrun-offineco-residentialarea．ChinaWater＆Wastewater2008241134-38inChinese3BelindaE．HattAnaDeleticTimD．Fletcher．Integrat-edtreatmentandrecyclingofstormwaterAreviewofAus-tralianpractice．JournalofEnvironmentalManagement2006791102-1134RayA．M．InouyeR．S．Developmentofvegetationinaconstructedwetlandreceivingirrigationreturnflows．Agri-cultureEcosystemsEnvironment20071214401-4065．．199916243-446《》．4．20027ChristosS．A．VassiliosA．T．EffectoftemperatureHRTvegetationandporousmediaonremovalefficiencyofpilot-scalehorizontalsubsurfaceconstructedwetland．Eco-logicalEngineering2007292173-1918．．2009223337-342LiLinfengNianYuegangJiangGaoming．Contributionofmacrophytesassimilationinconstructedwetlandstonitrogenandphosphorousremoval．ResearchofEnvironmentalSci-ences2009223337-342inChinese9．．200319123-24YangDunZhouQi．Mechanismandapplicationofnitrogenremovalbyconstructedwetlands．ChinaWater＆Wastewater200319123-24inChinese10LeeHaejinLauSim-LinMasoudKayhanianetal．Sea-sonalfirstflushphenomenonofurbanstormwaterdischar-ges．WaterResearch200438194153-416311．．200120832-3412．．2001121145-150CuiBaoshanLiuXingtu．Discussiononsomebasicprob-lemsindesignofwetlandecosystem．ChineseJournalofAppliedEcology2001121145-150inChinese9031