仔细添加的二氧化碳增强了自性d-乳酸盐的形成与工程Acetobacterium woodii
Anna Stock1, Inka Sotzeck1, Kira Baur2
1Chair of Biochemical Engineering Technical University of Munich Garching Germany.
Engineering in life sciences
|February 19, 2026
概括
一氧化碳 (CO) 添加到乙烯酸原 气体发酵对生长和d-乳酸盐的产生产生非线性影响. 最佳的二氧化碳水平可以提高生物质和d-乳酸盐产量,但高度是抑制性的.
科学领域:
- *代谢工程和合成生物学
- *微生物生物技术和生物工艺工程
背景情况:
- * 乙原性细菌,如A. 它将二氧化碳和H2转化为酸盐.
- *代谢工程允许非本土化合物的自营生成,例如d-乳酸盐.
- *一氧化碳 (CO) 可以增强生物质形成的减少等价物,但也抑制了乙烯基原体的生长.
研究的目的:
- * 调查不同度的二氧化碳 (0.6%-6.0%) 对人工人工菌的自营生长和d-乳酸盐生产的影响. 伍迪 (woodii) 是一个字.
- * 确定最佳的CO部分压力,以最大限度地提高批量发酵中的生物质和d-乳酸盐产量.
- *评估CO对A.的抑制作用. 伍迪 (woodii) 是一个字.
主要方法:
- * 工程制造的A.A.的批量发酵 在混合生物反应器中,连续加气.
- *对合成气混合物添加受控的二氧化碳 (0.6%-6.0%).
- * 监测细胞生长 (生物质度) 和d-乳酸盐的产生.
主要成果:
- * 在6.0%的碳化合物下,没有观察到增长或产品形成.
- *生物质度显著增加,达到3.0%的CO (89%的改善).
- * 经过长时间的滞后阶段,最高的d-乳酸盐积累 (6.2g L-1 ,189%的改善) 达到0.8%的CO.
- *增长和产品形成显示出非线性依赖CO度.
结论:
- * 在A.A. 伍迪表现出CO敏感性,需要精确控制合成气中的CO水平.
- *优化二氧化碳度对于最大限度地提高自营生物质和d-乳酸盐生产至关重要.
- * 非线性反应突出显示了人工合成乙原体中CO代谢的复杂性.
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