(农学)刘鸿亮院士：中国城市生活垃圾堆肥

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1、Professor:LiuHongliangDr.XiBeidouCompostingTechnologyforMunicipalSolidWasteTreatmentinChinaChineseResearchAcademyofEnvironmentalSciences,Beijing,100012ChinaNov4,2004Phone:86-10-84913946Fax:86–10-84915194Email:Liuhl2001@yahoo.com.cnINTRODUCTIONCompostingisaneffectivewayof

2、decomposingorganicsolidwastestomorestableandprofitablematerialsHowever,traditionalcompostingmethodwhollyreliesonitsinitialmicrobialcommunity,problemssuchasrelativelylongretentiontime,odoremissionsandpoorcompostqualitymaycomeout.Toimprovetheabovepitfalls,variousspecialized

3、seedinoculumshavebeenapplied.Sometimes,highconcentrationofindigenousmicroorganismscaninhibittheprevalenceofinoculatedonesThus,aninoculationmethodthatcaneffectivelycontroltheindigenouscellconcentrationishighlydesired.Theinoculatedmicrobialpopulationsandcommunitycomposition

4、swouldkeepevolvingincessantly,leadingtovariationsamongdifferentcompostingstagesTowellunderstandinoculationcompostingprocess,itisnecessarytodividethecompostingprocessesintomultiplestagesHowever,mostoftheexistingsystemsseldomconsideredthevariousstagesofinoculationcomposting

5、processes.Thisleadstodifficultiesindeterminingtheefficiencyofinoculation.OBJECTIVETheobjectiveofthisstudyistodevelopanewinoculationmethodtoenhancetheefficiencyofcompostingprocess,bycontrollingtheindigenouscellconcentrationandmakingtheremainingsolidsmoreamenabletobiologica

6、lattack.Inaddition,thisresearchalsoaimsatthedevelopmentofamoreoptimummethodforestimatingtheinoculationefficiency.MATERIALSANDMETHODSMunicipalsoildwaste(MSW)fromatypicalcommunityinBeijingwerecollected,sortedandmixeddirectlywithsawdustwithoutdrying.Theorganicscontentwasarou

7、nd60%.Themoisturecontentsoftheinitialwastemixturesofalltestswereadjustedtoaround55%byintroducingwaterorbulkingagenttothemixture.Thecarbontonitrogenratiowasaround24:1.MicroorganismstemperatureInoculumAInoculumBInoculumCBacteriaFungiActinomycetesCFU(30℃growth)CFU(60℃growth)

8、CFU(30℃growth)CFU(60℃growth)2.5×10116.3×109NDND1.6×1077.5×1081.5×1065.6×1091.8×10115.6×1091.2×10