关闭农业的循环:从便到气和生物肥料的生命周期评估
Arsal Tehseen1, Leticia Regueiro2, Gumersindo Feijoo1
1CRETUS, Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, Santiago de Compostela, 15782, Spain.
The Science of the total environment
|December 17, 2025
概括
奶牛农场可以通过将转化为气和生物肥料来减少温室气体排放. 这种闭环系统满足农场内能源需求,并将环境影响降低66%.
科学领域:
- 环境科学 环境科学
- 农业工程 农业工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 乳制品行业对全球温室气体 (GHG) 排放做出了重大贡献,主要来自便管理和肥料使用.
- 解决这些排放热点对于可持续农业和环境保护至关重要.
研究的目的:
- 开发和评估一个封闭循环系统,利用牲畜便生产气和肥料.
- 评估这个综合系统对奶牛场的环境和经济影响.
主要方法:
- 使用SuperPro Designer®建模了一个结合无氧消化 (AD),蒸汽甲改造和水气转移反应的系统.
- 使用初级农场数据和模拟结果进行了生命周期影响评估 (LCA),功能单位为1公斤脂肪和蛋白质校正牛奶 (FPCM).
- 经济分配和一个摇篮到门边界被用于LCA.
主要成果:
- 综合系统可以满足奶牛场的能源需求,并提供高达32%的肥料需求.
- 与传统农场相比,拟议的系统 (场景-2) 实现了每公斤FPCM的全球变暖潜力减少66% (场景-1).
- 经济分析显示,在情景-2.0中,价值向气生产 (63.01%) 显著转移.
结论:
- 综合性肥增值系统提供了一个有希望的途径,以提高循环性,并减少奶牛养殖的环境足迹.
- 该系统展示了同时恢复能量和营养的潜力,减少了对合成肥料的依赖.
- 需要进一步的研究来确定这种方法在各种农场类型,气候和地理位置上的可行性和可扩展性.
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