人工湿地处理污染河水现场中试的研究 (1)

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1、AbstraetStudyontreatmentofpollutedriverwaterfromXinyiRiverusingpilot．scaleConstructedWetland(CW)wasperformed．Thisriverisaflooddischargefiverwithgreatvariationsofwaterquantityandquality．ThefeasibilityofusingCWtotreatthepollutedriverwasdemonstrated．Theeffluentwaterqualityandrem

2、ovalefficiencyofdifferentCWsystemsatdifferenttimeperiods，differentretentiontimes，differentpollutantloads，anddifferentaquaticplantswerecompared．’Fhemainresultsshowthat：(1)CWhasgoodefficienciestoimprovethewaterqualityofpollutedXinyiRiverandtheeffluentsreachthetargetedwaterquali

3、ty．Itisapracticalmeasureforpollutedriverwatertreatment．(2)AmongtheselectedplantsintheCWs，Typhalat扣z妇，Scirpustocustris，CannaglaucaandLythrumsalicaria,theformerthreecanresistinundation，(3)WhentheinfluentconcentrationsofCODMn，NH4+-Nandcolouritywere3．11～117．28mg／L，1，30-24．71mg／La

4、nd45-600，theirmeanremovalrateswere59．90％，85，50％and65．00％ofSSFW,77，82％，86．988％and77．50％ofIVFW．TheefficiencyofpollutantremovalofIVFWisbetterthanthatofSSFW．(4)Exceptthefirststageofexperiment，theremovalefficienciesofCO'DMnandNH4+-NofSSFWandIVFWwerethehighestduringApriltoJune．Duri

5、ngOctobertoDecember,theremovalefficienciesofbothsystemswererelativelylow．(5)IVFWsystemhasbetterresistancetopollutantimpactloadthanSSFWsystem．TheoptimalpollutantloadofCODMnforbothsystemsis8-12g／m2．d．Whenitistoolowortoohigh，theremovalratedecreases．(6)ThebestretentiontimesofCODM

6、DandNH4+-NofSSFWare2and2．5daysrespectively,and1．5and2daysforIVFWsystemrespectively．(7)Thesystemscanbekeptatstabletemperatureandhavestrongreaerationability．ThepHofinfluentis6．4-8．0，whichisagoodconditionfornitrogenremovalinCW．(8)FourtypesofSFWwithdifferentaqumicplantshavediffer

7、entremovalratesofCODMn，NH4+-Nandcolourity．IntennsofCODMn，rypha[at‘if08ahasthebestremovalefficiency,andthenCannag&uca，Scirpuslocustr曲，andLythrumsalicaria(pollutantremovalefficienciesfromhightolow)．ForNH4+N，Cannaglaucaisthebestone，andthenLythrumsalicaria，Typhalatifolia，Scirpusl

8、ocustris．Whileforcolourity,Cannaglaucaisthebestone，andthenTyphalat弘l