【摘要】 对现有木薯燃料乙醇项目开展了全生命周期评价，得到项目全生命周期碳排放量为2298 kg CO₂eq，不能满足碳中和要求，与等量燃烧值汽油的碳排放量1837 kg CO₂eq比较，不具备碳减排竞争力。基于项目生命周期各阶段碳排放潜力数据及分析，提出了厌氧污泥沼渣还田、热电联产、沼气代煤、蒸汽降耗及秸秆代煤五项碳中和策略，实施后项目生命周期碳排放量由2298 kg CO₂eq降至-1372 kg CO₂eq，为负碳排放，满足碳中和要求。木薯燃料乙醇及下游产品显示出较强的碳中和及市场融碳潜力，为国家及行业制定产业发展政策提供了方向性的指导。更多还原

【Abstract】 Life cycle assessment of the existing cassava bioethanol project was conducted.The life-cycle carbon emission of the project was 2298 kg CO₂eq,failing to meet the requirement of carbon neutrality for biomass products,and lacking carbon reduction competitiveness compared with gasoline,whose life-cycle carbon emission was 1837 kg CO₂eq.Based on the carbon emission potential data of the project,we proposed 5 carbon neutrality strategies:returning anaerobic sludge residue to field,combined production of heat and power,biogas replacing coal,steam consumption reduction,and straw replacing coal.The optimized life-cycle carbon emission was remarkably reduced to-1372 kg CO₂eq,achieving the carbon neutrality target.Cassava fuel ethanol and its downstream products show strong competitiveness in carbon neutrality and market carbon melting.This study has provided guidance for the government and the industry to formulate relevant industrial development policies.更多还原