Effect of Different Partial Pressures on H<sub>2</sub> Production with <i>Parageobacillus thermoglucosidasius</i> DSM 6285
The ability of <i>Parageobacillus thermoglucosidasius</i> to produce H<sub>2</sub> from CO via the water–gas shift (WGS) reaction makes it a compelling microorganism for biofuels research. Optimizing this process requires evaluating parameters such as pressure. This study aim...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-11-01
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| Series: | Fermentation |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-5637/10/11/592 |
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| Summary: | The ability of <i>Parageobacillus thermoglucosidasius</i> to produce H<sub>2</sub> from CO via the water–gas shift (WGS) reaction makes it a compelling microorganism for biofuels research. Optimizing this process requires evaluating parameters such as pressure. This study aimed to understand how H<sub>2</sub> production is affected by increasing CO, N<sub>2</sub>, and H<sub>2</sub> partial pressures to 1.0, 2.0, and 3.0 bar. Increasing CO partial pressure can improve the solubility of the gas in the liquid phase. However, raising CO partial pressure to 3.0 bar had an inhibitory effect, delaying and reducing H<sub>2</sub> production. By contrast, increasing N<sub>2</sub> and H<sub>2</sub> partial pressures to 3.0 bar had positive effects, reaching a H<sub>2</sub> production of 9.2 mmol and 130 mmol, respectively. Analysis of the electron balance at the end of the fermentation process showed that the selectivity toward H<sub>2</sub> production reached 95%, with the remainder of electrons deriving from CO and glucose directed at organic acid production, mainly acetate, followed by formate. |
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| ISSN: | 2311-5637 |