在固态食品废弃物酸性生成过程中,在自生压力下,对发酵途径控制的机制性见解
Liwen Luo1, Jonathan W C Wong2, Binghua Yan2
1Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, China; TRASLAB, Department of Biotechnology, Ghent University, Frieda Saeysstraat 1, Ghent 9052, Belgium; Center for Advanced Process Technology for Urban Resource Recovery (CAPTURE), Frieda Saeysstraat 1, Ghent 9052, Belgium.
Water research
|October 1, 2025
概括
食品废弃物的自生压力酸性生成通过增强微生物通路来增加可溶性微生物产品 (SMP) 的产量. 这种自我产生的压力为废物管理和循环生物经济的发展提供了一个可持续的战略.
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:
- 两相无氧消化效率取决于酸性阶段.
- 酸性废气产生自生压力,影响物理化学环境和微生物活动.
- 在固态无氧消化过程中,自产压力的机械作用尚不清楚.
研究的目的:
- 研究自生压力对固态食品废弃物的酸性生成的影响.
- 专注于溶性微生物产品 (SMP) 的形成和分子水平的代谢反应.
- 确定自生压力如何影响微生物通路和中间产生的影响.
主要方法:
- 固体无氧消化对食物浪费进行实验.
- 分析可溶微生物产品 (SMP) 的产量.
- 超基因组分析以评估微生物社区结构和功能基因.
- 代谢物分析以确定关键的中间体和途径.
- 化实验以验证特定的代谢作用.
主要成果:
- 自生压力增加了SMP产量,从365.3gCOD/kgVSadded增加到407.1g.
- 压力最初促进了乳酸盐的产生,然后增强了其转化为丁酸盐和酸盐.
- 大基因组数据显示,同类乙生成和丁酸盐合成基因的丰富性增加.
- 乙酸盐刺激了逆β氧化路径,并在乳酸盐转化过程中抑制了烯酸盐路径.
- 丁酸盐的产量增加了25%,而酸盐的产量减少了43%.
结论:
- 自生压力在固态条件下增强了酸性分解和SMP的产生.
- 特定的微生物群落和代谢途径 (例如,丁酸盐合成) 通过自身压力进行上调.
- 通过自身压力的自我调节提供了一种策略,以改善无氧消化过程中的产品产量和过程控制.
- 这些发现有助于可持续的固体废物管理和循环生物经济倡议.
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