岳Greenhouse gas emissions from two-stage landfilling of municipal solid waste .pdf

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1、AtmosphericEnvironment55(2012)139e143ContentslistsavailableatSciVerseScienceDirectAtmosphericEnvironmentjournalhomepage:www.elsevier.com/locate/atmosenvGreenhousegasemissionsfromtwo-stagelandfillingofmunicipalsolidwasteYuanyuanZhang,DongbeiYue*,Yongfe

2、ngNieKeyLaboratoryforSolidWasteManagementandEnvironmentSafety,MinistryofEducationofChina,TsinghuaUniversity,Beijing100084,ChinaarticleinfoabstractArticlehistory:SimulationswereconductedtoinvestigategreenhousegasemissionsfromaerobicpretreatmentandRece

3、ived24October2011subsequentlandfilling.Theflowsincarbonbalance,suchasgas,leachate,andsolidphases,wereReceivedinrevisedformconsideredinthesimulations.ThetotalamountofCO2eq.decreasedasorganicremovalefficiency(ORE)16March2012increased.AtOREvaluesof0,0.30,0

4、.41,and0.54,thetotalamountsofCO2eq.were2614,2326,2075,Accepted19March2012and1572kgCO2eq.peronetondrymatter,respectively;gasaccountedforthemaincontributiontothetotalamount.ThereductioninCO2eq.fromleachatewastheprimarypositivecontribution,accountingKey

5、words:for356%,174%,and100%oftotalreductionatOREvaluesof0.30,0.41,and0.54,respectively.TheCO2eq.Two-stagelandfillingfromenergyconsumptionwasthenegativecontributiontototalreduction,butthiscontributionisBiogasGreenhouseeffectconsiderablylowerthanthatfrom

6、gas.AerobicpretreatmentshortenedthelagtimeofbiogasproductionAerobicpretreatmentby74.1e97.0%,andfacilitatedthetransferoforganiccarboninsolidwastefromuncontrolledbiogasandMunicipalsolidwastehighlypollutingleachatetoaerobicallygeneratedCO2.Ó2012Elsevier

7、Ltd.Allrightsreserved.1.Introductionenhancinggascapture.Withoutahighpermeabilitylayerbeneaththelandfillcover,CH4emissionsincreasedtoasmuchas24%ofConventionallandfillingisacommonlyusedmethodforthetotalgeneratedCH4,avaluetwicehigherthanthatgeneratedwithd

8、isposalofmunicipalsolidwaste(MSW).Duringwastedegrada-apermeablelayerinstalled.tion,aconservativepercentage(50%)ofthetotalcarboninMSWisInsomepartsofChina,landfillgasisemitteddirectlytothereleasedaslandfillgasandleachate(Jeonetal.,2007);90%oftheatmospher