从过期的乳制品和饮料废物中生产乳酸介导的中链脂肪酸
Bin Bian1,2, Wenxiang Zhang1,3, Najiaowa Yu2
1Water Desalination and Reuse Center (WDRC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia.
Environmental science and ecotechnology
|May 22, 2024
概括
过期的乳制品和饮料废物可以通过两阶段的发酵过程转化为有价值的中链碳酸 (MCCA). 这种可持续的方法为食品废物管理提供了传统生物气生产的替代方案.
科学领域:
- 生物技术是生物技术.
- 环境科学 环境科学
- 微生物学 微生物学
背景情况:
- 家庭食品浪费,主要来自水果,蔬菜和乳制品,是一个重大的环境问题.
- 目前的处理方法,如无氧消化,主要产生生物气,限制了更高价值化学品生产的潜力.
- 实现循环碳经济需要将食物浪费转化为宝贵的化学品,而不仅仅是能源.
研究的目的:
- 为了证明从过期的乳制品和饮料废物中生产中链碳酸盐 (MCCA) 的可行性.
- 建立一个乳酸中介链延长平台,以改善食品废弃物中的化学合成.
- 探索微生物群落和高效MCCA生产的操作条件.
主要方法:
- 采用了两阶段的发酵过程,在第一阶段优化了温度和有机加载率.
- 过期的乳制品和饮料废物被转化为乳酸盐,随后微生物链被延长以产生MCCA.
- 微生物社区分析,包括共发生网络分析,用于识别关键的微生物参与者和相互作用.
主要成果:
- 第一个发酵阶段在43°C时达到高乳酸盐度 (>900毫米摄氏度),富含乳酸盐产生细菌,如*Lactobacillus*.
- 第二阶段通过微生物链延长成功产生了大量的酸盐 (>500 mM C) 和丁酸盐 (>300 mM C).
- 在第二阶段确定了关键的微生物属 (*Megasphaera*, *Caproiciproducens*),具有强烈的正相关性,表明对鱼产生的协同相互作用.
结论:
- 通过乳酸介导链延长从过期的乳制品和饮料废物中生产MCCA是一种可行的和可持续的方法.
- 这个过程提供了一个有前途的化学生产平台,为循环生物经济做出了贡献.
- 优化的微生物群落和发酵条件对于高效的MCCA从食品废弃物中合成至关重要.
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