乙酸盐冲击负载提高了无氧微生物群的CO吸收率
Alberto Robazza1, Ada Raya I Garcia1, Flávio C F Baleeiro2
1Institute of Process Engineering in Life Sciences 2: Electro Biotechnology, Karlsruhe Institute of Technology - KIT, Karlsruhe, Germany.
Microbial biotechnology
|December 9, 2024
概括
无氧微生物组具有弹性地转化合成气和酸盐,即使在高负载和低pH值下也是如此. 工艺条件改变了微生物群落和产品谱,增强了资源循环.
科学领域:
- 生物技术和生物工程 生物技术和生物工程
- 环境微生物学 环境微生物学
- 可再生能源可再生能源是可再生能源.
背景情况:
- 石纤维素生物质的热解产生合成气 (CO,CO2,H2) 和富含酸盐的废水.
- 通过共同发酵集成这些流提供了资源循环,减少了对化石燃料的依赖.
- 了解微生物弹性和不同条件下的产品形成对于过程优化至关重要.
研究的目的:
- 为了评估增加酸盐冲击负载对合成气共发酵的影响.
- 评估不同pH值 (6.7和5.5) 和温度 (37°C和55°C) 对微生物群体组成和代谢物产生的影响.
- 为了确定负责基质转化和产品形成的微生物候选者.
主要方法:
- 在受控的pH值和温度下,合成气与无氧微生物群的共发酵.
- 暴露于不断增加的酸盐冲击负载,高达64 g/L.
- 使用分子技术分析基质消耗,代谢物生产和微生物群体组成.
主要成果:
- 无氧微生物群表现出了显著的弹性,即使在高酸盐度 (高达64g/L) 和pH值5.5.的情况下,也能转化合成气.
- 工艺参数的修改 (pH,温度,乙酸盐负载) 导致微生物群落和产品形状的变化.
- 乙酸补充剂持续增加了多达20倍的碳酸转化率,特别是在pH值5.5和55°C时.
结论:
- 无氧微生物群是强大的,适应集成合成气和废水流.
- 优化pH值,温度和酸盐负载可以引导微生物活动向所需产品方向,并提高转化效率.
- 这项研究支持整合工艺流,以提高资源循环性和减少环境影响.
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