不同污泥处理与处置工艺的碳排放分析

刘洪涛1,陈同斌1,杭世珺2,王洪臣3,王伟4,李国学5,孔彦鸿6(1.中国科学院地理科学与资源研究所,北京100101;2.北京市市政工程设计研究总院,北京100082;3.中国人民大学环境学院,北京100872;4.清华大学环境科学与工程系,北京100084;5.中国农业大学资源与环境学院,北京100094;6.中国城市规划设计研究院城市水系统规划设计研究所,北京100044):对我国现行的主流污泥处理与处置技术路线:生物干化/土地利用工艺和热干化/焚烧工艺的碳排放进行了计算和收支分析结果表明,生物干化工艺的CO2直接排放量和碳足迹量均较低,而热干化/焚烧工艺的CO2排放量和碳足迹量分别为生物干化的5.33和4.94倍将干化污泥用作草坪基质具有一定的碳减排和碳汇增加功能,CO2减排量和吸收量分别达到68.7和648kg/t从碳净排放量看,热干化/焚烧工艺表现为高碳排放特征(372.9kg/t),而生物干化/土地利用工艺具有碳减排效应(-643.6kg/t),符合当前的政策背景与产业导向:污泥;干化;二氧化碳;排放;碳足迹:X703:C:1000-4602(2010)17-0106-03:(863)(2009AA6047032008AA062402);(2007BAD87B01)AnalysisonCarbonEmissionfromDifferentSewageSludgeTreatmentandDisposalProcessesLIUHongtao1,CHENTongbin1,HANGShijun2,WANGHongchen3,WANGWei4,LIGuoxue5,KONGYanhong6(1.InstituteofGeographicSciencesandNaturalResourcesResearch,ChineseAcademyofSciences,Beijing100101,China;2.BeijingGeneralMunicipalEngineeringDesignandResearchInstitute,Beijing100082,China;3.SchoolofEnvironmentandNaturalResources,RenminUniversityofChina,Beijing100872,China;4.DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China;5.CollegeofResourcesandEnvironmentalSciences,ChinaAgriculturalUniversity,Beijing100094,China;6.InstituteofUrbanWaterSystemPlanningandDesign,ChinaAcademyofUrbanPlanningandDesign,Beijing100044,China)Abstract:ThecurrenttechnologyroadmapsofsewagesludgetreatmentanddisposalinChinaarebiodrying/landutilizationprocessandheatdrying/incinerationprocess.Carbondioxideemissionfromtheprocesseswascalculatedanditsemissionbudgetwasanalyzed.Theresultsindicatethatthecarbondioxideemissionandcarbonfootprintofbiodrying/landutilizationprocessarelower,andthoseofheatdrying/incinerationprocessare5.33and4.94timesthoseofbiodrying/landutilizationprocessrespectively.Usingdriedsludgeaslawnsubstratecanreducecarbonemissionandincreasecarbonsequestra106第26卷第17期2010年9月中国给水排水CHINAWATER&WASTEWATERVo.l26No.17Sep.2010tion,andtheamountsofcarbondioxideemissionreductionandabsorptionare68.7kg/tand648kg/trespectively.Consideringnetcarbonemission,theheatdrying/incinerationprocessischaracterizedbyhighcarbonemissionof372.9kg/,twhilethebiodrying/landutilizationprocesshascarbonemissionreductioneffect(-643.6kg/t).Thelatermeetsthecurrentpolicyandthefuturetrend.Keywords:sewagesludge;drying;carbondioxide;emission;carbonfootprint,,(80%)3000104t[1],2009,2020GDP200540%~45%,,,//,1研究概况11,200t/d,CTB,CompsoftV3.0,,20d/,60t/d,/,,,10hm2,75t/hm212,CO2:CO2=CVSBVSRIQ1,,C,VS,BVS,R,ICO2,Q1/CO2:CO2=CVSIQ2,,C,VS,ICO2,Q2(CO),,CO2,1.003.060.622.491.78kg/kg2结果与分析21CO2:C=20%VS=60%BVS=65%R=40%I=2.1Q1=65%,CO242.6kg/t:C=20%VS=60%I=2.1Q2=90%,CO2227kg/t22221,200t/d,5760kWh/d,50L/d,29.5kg/t222//,60t/d,750kWh/d,2400kg/d,145.7kg/t223CO242.6kg/,tCO2,CO2,CO2,5.33,29.5kg/,t/,,107刘洪涛,等:不同污泥处理与处置工艺的碳排放分析第26卷第17期145.7kg/,t4.94,CO212~185kg/t[2],23231,,,,0.17kg/m3,1.8,0.3kg,CO20.95kg/t23275%,5%35%,21.4kg1.55kg/kg0.45kWh/kg,,CO268.7kg233[3],CO2360kg/(hm2d)4.5,CO2648kg24/,10%,6m3/d,,0.5kg/m3,CO20.15kg(-715.75kg/t),,25/,CO2;/,CO2,11CO2Tab.1CO2netemissionofsewagesludgeindifferentprocesskgt-1CO2CO2CO2CO2CO2/42.630.568.7648-643.6/227145.9372.93结论,,;,,CO2,(-643.6kg/t),,CO2/CO2372.9kg/t,,/致谢:住房和城乡建设部城市建设司张悦巡视员为本论文提供重要参考数据,并提出宝贵意见与建议,在此特别表示诚挚的谢意:[1],,,.[J].,2009,25(9):104-108.[2]ClemensJ,CuhlsC.Greenhousegasemissionsfrommechanicalandbiologicalwastetreatmentofmunicipalwaste[J].EnvironTechno,l2003,24(6):745-754.[3],,,.[J].,2009,(3):79-85.:[phone]E-mail:[e-mail]:2010-03-30108第26卷第17期中国给水排水