微生物机制用于在恒温下无氧消化过程中提高的产生,而不是梯度加热
Heng Wu1, Anjie Li2, Huaiwen Zhang1
1College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
Microbiome
|September 9, 2024
概括
恒定65°C优化了通过高固体无氧消化 (HS-AD) 来从纤维素中生产 (H2). 然而,梯度加热通过促进H2消耗途径来抑制H2产量.
科学领域:
- 生物技术和生物工程 生物技术和生物工程
- 可再生能源可再生能源是可再生能源.
- 微生物生态学 微生物生态学
背景情况:
- 来自纤维素的 (H2) 为化石燃料提供了清洁能源的替代方案.
- 优化温度对于通过高固体无氧消化 (HS-AD) 产生H2至关重要.
- 温度调节的H2积累背后的微生物机制需要研究.
研究的目的:
- 为了比较恒定与梯度加热温度,从富含纤维素素的草生产H2.
- 阐明影响不同温度状态下H2积累的微生物机制.
- 确定最佳的温度策略,以最大限度地提高HS-AD中的H2产量.
主要方法:
- 在恒温 (35,55,65°C) 和梯度加热 (3565°C) 下,高固体无氧消化 (HS-AD) 富含纤维素素的草.
- 分析红素残留物,纤维素和半纤维素的释放.
- 超基因组分析以确定关键的微生物群落和参与H2生产和消费的基因.
主要成果:
- 恒定65°C产生了最高的H2产量 (26.01mL/g VS) 与最小的素残留量 (1.93%).
- 梯度加热 (3565°C) 导致较高的素残留量 (2.49%) 和显著降低的H2产量 (13.53 mL/g VS).
- 甲基因组学揭示了65°C的H2产生细菌和基因的丰富,而梯度加热则有利于消耗H2的细菌和基因 (例如,Acetivibrio).
结论:
- H2的积累是由产生/消耗H2的细菌和基因调节的,而不仅仅是素的降解.
- 温度通过促进微生物新陈代谢和物质转移来增强纤维素酸的水解.
- 与梯度加热相比,恒定65°C代表了HS-AD中H2生产的优越策略.
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