简介:Background:Replacementoffossilfuelbasedenergywithbiochar-basedbioenergyproductioncanhelpreducegreenhousegasemissionswhilemitigatingtheadverseimpactsofclimatechangeandglobalwarming.However,theproductionofbiochar-basedbioenergydependsonasustainablesupplyofbiomass.Although,NorthwesternOntariohasarichandsustainablesupplyofwoodybiomass,acomprehensivelifecyclecostandeconomicassessmentofbiochar-basedbioenergyproductiontechnologyhasnotbeendonesofarintheregion.Methods:Inthispaper,weconductedathoroughlifecyclecostassessment(LCCA)ofbiochar-basedbioenergyproductionanditslandapplicationunderfourdifferentscenarios:1)biocharproductionwithlowfeedstockavailability;2)biocharproductionwithhighfeedstockavailability;3)biocharproductionwithlowfeedstockavailabilityanditslandapplication;and4)biocharproductionwithhighfeedstockavailabilityanditslandapplication-usingSimaPro~,EIOLCA~softwareandspreadsheetmodeling.BasedontheLCCAresults,wefurtherconductedaneconomicassessmentforthebreak-evenandviabilityofthistechnologyovertheprojectperiod.Results:Itwasfoundthattheeconomicviabilityofbiochar-basedbioenergyproductionsystemwithinthelifecycleanalysissystemboundarybasedonstudyassumptionsisdirectlydependentoncostsofpyrolysis,feedstockprocessing(drying,grindingandpelletization)andcollectiononsiteandthevalueoftotalcarbonoffsetprovidedbythesystem.SensitivityanalysisoftransportationdistanceanddifferentvaluesofCoffsetshowedthatthesystemisprofitableincaseofhighbiomassavailabilitywithin200kmandwhenthecostofcarbonsequestrationexceedsCAD$60pertonneofequivalentcarbon(CO_2e).Conclusions:Biochar-basedbioenergysystemiseconomicallyviablewhenlifecyclecostsandenvironmentalassumptionsareaccountedfor.Thisstudyprovidesamediumscaleslow-pyrolysisplantscenarioandwerecommendsimilarexperimentswithlarge-scale
简介:10月13日,从国家安全生产监督管理总局获悉,国务院安全生产委员会办公室将组织成立31个检查组,深入全国32个省级统计单位,进行安全生产大检查“回头看”。