二氧化碳对发酵产品,微生物群落和功能基因的影响在食品废弃物发酵中,pH值不受控制
Xin-Rong Pan1, Pei-Ken Shang-Guan1, Shu-Hui Li1
1College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310015, PR China.
Environmental research
|December 18, 2024
概括
二氧化碳 (CO2) 散射丰富了食品废弃物发酵中的酸盐生产. 这种方法促进酸盐形成的微生物,同时抑制竞争的途径,改善资源回收.
科学领域:
- 环境微生物学 环境微生物学
- 生物技术是生物技术.
- 废物管理 废物管理
背景情况:
- 食物浪费是一个重大的全球性挑战.
- 酸性发酵为从食物废物中回收资源提供了一个可行的途径.
- 混合挥发性脂肪酸 (VFA) 复杂化了发酵产品的直接利用.
研究的目的:
- 为了研究二氧化碳 (CO2) 在食品废弃物发酵过程中对乙酸丰富的效应.
- 分析微生物群落,基因表达和参与乙酸生产的代谢途径.
- 为了优化食品废弃物发酵,以提高酸盐的回收.
主要方法:
- 食品废弃物发酵反应堆的建造和运行,分为三个不同的阶段.
- 在第三阶段使用二氧化碳散射来促进酸盐的丰富.
- 微生物社区组成,基因表达和代谢途径的生物信息学分析.
主要成果:
- 二氧化碳散热显著增加了酸盐度和比率,在R1达到6044毫克COD/L (63%),在R2达到5000毫克COD/L (66%) 在第3阶段.
- 微生物群落发生了转变,Aeriscardovia (Actinobacteria) 占主导地位,在CO2分离后相对丰富度为85.7%.
- 观察到基因 (wcaB,ttrC) 和通路 (pyruvate 到乙,乙-CoA 到酸二) 的显著下调,表明竞争性发酵路径的抑制.
结论:
- 二氧化碳缩是一种有效的策略,可以增强食品废弃物发酵中的乙酸盐生产.
- 该机制涉及促进产生酸盐的微生物和抑制竞争的代谢途径.
- 这种方法通过有针对性的VFA生产,提高了从食物浪费中回收资源的可行性.
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