关于方法和系统界限的观点,以开发农场无氧消化减排成本
Jorge Diaz Huerta1,2, Richard O'Shea1,2, Jerry Murphy1,2
1MaREI Centre, Environmental Research Institute, University College Cork, Cork, Ireland.
Bioengineered
|September 15, 2023
概括
在农业中,无氧消化 (AD) 的边际减排成本曲线有很大的差异. 诸如收入流和系统规模影响成本等因素,显示范围广泛,从-117到+79€/tCO2eq.
科学领域:
- 农业经济学 农业经济学
- 环境科学环境科学
- 可再生能源技术可再生能源技术
背景情况:
- 边际减排成本曲线 (MACCs) 评估各经济部门的温室气体减排选择.
- 爱尔兰农业中的大型无氧消化 (AD) 设施通常被视为高成本的解决方案.
- 之前的研究报告了AD的单次减排成本 (例如,热/电的115欧元/tCO2eq,生物甲的280欧元/tCO2eq).
研究的目的:
- 为了比较中小型农场无氧消化 (AD) 系统的减排成本.
- 根据不同的系统尺度和操作参数,分析AD减排成本的变化.
- 确定影响AD作为温室气体减排战略经济可行性的关键因素.
主要方法:
- 基于先前文献的两个案例研究的比较技术经济分析.
- 评估爱尔兰的小规模AD (牛污泥,开放式水箱,冬季收集) 和美国的中等规模AD (牛污泥,室内收集,全年).
- 在系统边界内包括各种收入来源和减排,以计算成本.
主要成果:
- 对于AD系统的减排成本有很大差异,从每二氧化碳等效 (tCO2eq) 的-117欧元到+79欧元不等.
- 影响减排成本的关键变量包括来自生物肥料销售的额外收入,排斥的节能和激励措施.
- 除了某些收入来源或排放节约,导致报告的减排成本更高.
结论:
- 将单一的缓解成本分配给无氧消化系统是不代表性的,因为系统拓和边界的变化.
- 农场内AD系统,特别是考虑到不同的收入来源和规模时,比以前假设的更具变化和潜在的成本效益的减排选择.
- 考虑到特定的系统配置和当地经济因素的进一步详细分析对于准确的农业中MACC发展至关重要.
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