利用Clostridium ragsdalei将CO2转化为乙醇:从批次和连续发酵中获得的见解
Rahul Thunuguntla1, Ralph S Tanner2, Hasan K Atiyeh1
1Biosystems and Agricultural Engineering, Oklahoma State University Stillwater OK USA.
Bioresource technology
|February 3, 2025
概括
克洛斯特里拉格斯达利P11有效地将二氧化碳 (CO2) 转化为乙醇,一种生物燃料. 与批量工艺相比,连续发酵显著提高了乙醇产量,达到21g/L.
科学领域:
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
- 微生物学 微生物学
背景情况:
- 将二氧化碳 (CO2) 转化为生物燃料提供了一条可持续的途径,以减少排放并改善生物炼油厂的经济性.
- 克洛斯特里迪亚物种以其能够将包括CO2在内的合成气成分发酵为有价值的产品而闻名.
- 优化二氧化碳发酵对于开发高效的碳捕获和利用技术至关重要.
研究的目的:
- 通过使用Clostridium ragsdalei P11.11来研究二氧化碳转化为乙醇.
- 为了比较批量乙醇生产与连续生物反应器模式的效率.
- 评估二氧化碳发酵过程中乙-CoA通路中关键酶的活性.
主要方法:
- 在3L生物反应器中培养Clostridium ragsdalei P11在批量和连续运行下进行培养.
- 测量乙醇生产和气体转化效率 (CO2和H2).
- 对特定酶活性的测定:一氧化碳脱酶 (CODH),酶 (H2ase),甲酸脱酶 (FDH) 和酒精脱酶 (ADH).
主要成果:
- 菌株P11在批量模式下以40%的CO2和60%的H2转换产生了7g/L的乙醇.
- 连续模式显著提高了乙醇产量,达到21g/L.
- 在连续模式下,酶活性 (CODH,H2ase,FDH,ADH) 显著提高 (3.6-7倍),与乙醇产量相关.
结论:
- 克洛斯特里拉格斯达利P11是一种有效的微生物,可以将二氧化碳转化为乙醇.
- 连续发酵是最大限度地提高乙醇生产和酶活性的一种优越方式.
- 这项研究为优化生物燃料生产的二氧化碳发酵过程提供了基础.
相关概念视频
01:20Fates of Pyruvate
8.3K
Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
8.3K
01:29Fermentation
113.2K
Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
113.2K