生物乙醇生产的生命周期来自不同食品废物的混合物
Victória Dutra Fagundes1, Ênio Leandro Machado2, Rosana de Cássia de Souza Schneider2
1Technology Institute, University of Passo Fundo, Passo Fundo, RS, Brazil.
Environmental technology
|January 28, 2025
概括
从食物浪费中生产生物乙醇显示了对环境的影响,加工食品造成的影响最大. 一个优化的流程可以显著减少这些影响,使其更加可持续.
科学领域:
- 生物技术和生物燃料生产
- 环境科学与可持续发展
- 化学工程是化学工程的重要组成部分.
背景情况:
- 食品废弃物是生产生物乙醇的潜在原料.
- 评估生物乙醇生产过程的环境可持续性至关重要.
- 生命周期评估 (LCA) 是评估环境影响的一个关键方法.
研究的目的:
- 从各种食品废物进行生物乙醇生产的门到门生命周期评估 (LCA).
- 将标准生产场景与优化场景进行比较.
- 确定导致环境影响的关键阶段和废物类型.
主要方法:
- 使用Ecoinvent 3.4数据库和ReCiPe 2016方法进行影响评估.
- 通过SimaPro软件使用蒙特卡洛模拟进行不确定性分析.
- 将标准场景 (包括干燥) 与优化场景 (消除干燥,使用酸) 进行比较.
主要成果:
- 在所有情景中,加工食品废弃物混合物表现出最高的环境影响.
- 当包括能源消耗时,发酵阶段是造成影响的主要因素.
- 在没有能源考虑的情况下,预处理和酶性水解成为更重要的冲击驱动因素.
- 全球变暖潜力 (GWP) 和资源枯竭是受影响最大的影响类别.
结论:
- 优化的生物乙醇生产场景显示,与标准场景相比,环境影响减少.
- 消除干燥和用酸取代酸缓冲剂是可持续性的有效策略.
- 加工食品废弃物对生物乙醇生产构成的环境挑战比结核或水果废弃物更大.
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