环境工程学报2025，Vol.19Issue(6)：1317-1326,10.DOI:10.12030/j.cjee.202407033
城市多源有机固体废弃物协同厌氧消化处理全流程碳排放分析
Carbon emission analysis of the whole process of collaborative anaerobic digestion treatment of municipal multi-source organic solid waste
摘要
Abstract
To address the issues of unclear carbon emission levels and absence of clear paths for carbon reduction in the urban multi-source organic solid waste collaborative treatment industry,this study developed a carbon emission accounting method tailored for this sector.Using the urban sludge and kitchen waste collaborative anaerobic digestion project in Jiujiang City as a case study,this research systematically evaluated the carbon emissions throughout the entire life cycle of urban multi-source organic solid waste.The findings indicated that the total net carbon emissions for the entire process route amounted to 1 337.06 kgCO2-eq·tDS-1.The carbon emission intensity of the sludge dewatering process exhibited a negative correlation with treatment scale,with electricity emissions contributing to 86.4％～94.6％ of the dewatering unit's emissions.Indirect carbon emissions accounted for 92.7％ of overall anaerobic digestion treatment emissions,primarily resulting from electricity(74％),fuel(18％),and chemicals(0.7％).Carbon emissions from low-temperature drying of digestate residue(33.4％),biogas slurry treatment(20.8％),heating(18.1％),and deodorization(13.6％)units collectively accounted for 85.9％ of carbon emissions during the anaerobic digestion,representing prime targets for carbon reduction.The carbon offset from the land application of digestate residue was-313.72 CO2 eq·tDS-1.By precisely identifying units with high emissions,this study can develop appropriate carbon reduction strategies.These strategies encompassed reducing power consumption in process equipment,enhancing biogas production within the system to decrease fuel consumption,substituting traditional agents with green,low-carbon dewatering agents,and implementing more energy-efficient biogas slurry treatment processes to achieve carbon reduction goals.This research offers insights for energy conservation,pollution control,and carbon reduction in the urban organic waste treatment industry.关键词
城市有机固体废弃物/多源协同/市政污泥/餐厨垃圾/碳排放/温室气体Key words
municipal organic solid waste/multi-source collaboration/municipal sludge/kitchen waste/carbon emissions/greenhouse gas分类
环境科学引用本文复制引用
王航,王先恺,李锟,乔雪园,刘枫,江涛,陈祥..城市多源有机固体废弃物协同厌氧消化处理全流程碳排放分析[J].环境工程学报,2025,19(6):1317-1326,10.基金项目
国家重点研发计划资助项目(2020YFC1908700) （2020YFC1908700）
中国长江三峡集团有限公司资助项目(NBWL202300013) （NBWL202300013）
