人工湿地处理污染河水现场中试的研究

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

2、tCWsystemsatdifferenttimeperiods，differentretentiontimes，differentpollutantloads，anddifferentaquaticplantswerecompared．’Fhemainresultsshowthat：(1)CWhasgoodefficienciestoimprovethewaterqualityofpollutedXinyiRiverandtheeffluentsreachthetargetedwaterquality．Itisapracticalmeasureforpollutedriverwatertre

3、atment．(2)AmongtheselectedplantsintheCWs，Typhalat扣z妇，Scirpustocustris，CannaglaucaandLythrumsalicaria,theformerthreecanresistinundation，(3)WhentheinfluentconcentrationsofCODMn，NH4+-Nandcolouritywere3．11～117．28mg／L，1，30-24．71mg／Land45-600，theirmeanremovalrateswere59．90％，85，50％and65．00％ofSSFW,77，82％，86

4、．988％and77．50％ofIVFW．TheefficiencyofpollutantremovalofIVFWisbetterthanthatofSSFW．(4)Exceptthefirststageofexperiment，theremovalefficienciesofCO'DMnandNH4+-NofSSFWandIVFWwerethehighestduringApriltoJune．DuringOctobertoDecember,theremovalefficienciesofbothsystemswererelativelylow．(5)IVFWsystemhasbetterr

5、esistancetopollutantimpactloadthanSSFWsystem．TheoptimalpollutantloadofCODMnforbothsystemsis8-12g／m2．d．Whenitistoolowortoohigh，theremovalratedecreases．(6)ThebestretentiontimesofCODMDandNH4+-NofSSFWare2and2．5daysrespectively,and1．5and2daysforIVFWsystemrespectively．(7)Thesystemscanbekeptatstabletempera

6、tureandhavestrongreaerationability．ThepHofinfluentis6．4-8．0，whichisagoodconditionfornitrogenremovalinCW．(8)FourtypesofSFWwithdifferentaqumicplantshavedifferentremovalratesofCODMn，NH4+-Nandcolourity．IntennsofCODMn，rypha[at‘if08ahasthebestremovalefficiency,andthenCannag&uca，Scirpuslocustr曲，andLythrums

7、alicaria(pollutantremovalefficienciesfromhightolow)．ForNH4+N，Cannaglaucaisthebestone，andthenLythrumsalicaria，Typhalatifolia，Scirpuslocustris．Whileforcolourity,Cannaglaucaisthebestone，andthenTyphalat弘l