沼渣
沼气
可再生能源
生命周期评估
温室气体
重新使用
废物管理
环境科学
生物能源
背景(考古学)
生物燃料
生产(经济)
环境工程
厌氧消化
工程类
生态学
古生物学
电气工程
宏观经济学
甲烷
经济
生物
作者
Shaoqing Chen,Bin Chen,Dan Song
标识
DOI:10.1016/j.biortech.2012.03.084
摘要
In the context of global energy shortages and climate change, developing biogas plants with links to agricultural system has become an important strategy for cleaner rural energy and renewable agriculture. In this study, a life-cycle energy and environmental assessment was performed for a biogas–digestate utilization system in China. The results suggest that biogas utilization (heating, illumination, and fuel) and comprehensive digestate reuse are of equal importance in the total energy production of the system, and they also play an important role in systemic greenhouse gas mitigation. Improvement can be achieved in both energy production and emissions mitigation when the ratio of the current three biogas utilization pathways is adjusted. Regarding digestate reuse, a tradeoff between energy and environmental performance can be obtained by focusing on the substitution for top-dressing, base fertilizers, and the application to seed soaking.
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