Furfural Influences Hydrogen Evolution and Energy Conversion in Photo-Fermentation by <i>Rhodobacter capsulatus</i>
Furfural, as a typical byproduct produced during the hydrolysis of lignocellulose biomass, is harmful to the photo fermentation hydrogen production. In this work, the effects of furfural on the photo fermentation hydrogen production by <i>Rhodobacter capsulatus</i> using glucose as subst...
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MDPI AG
2022-08-01
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| Series: | Catalysts |
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| author | Wen Cao Xuan Wei Youmin Jiang Jiali Feng Zixuan Gao Canfang Tang |
| author_facet | Wen Cao Xuan Wei Youmin Jiang Jiali Feng Zixuan Gao Canfang Tang |
| author_sort | Wen Cao |
| collection | DOAJ |
| description | Furfural, as a typical byproduct produced during the hydrolysis of lignocellulose biomass, is harmful to the photo fermentation hydrogen production. In this work, the effects of furfural on the photo fermentation hydrogen production by <i>Rhodobacter capsulatus</i> using glucose as substrate were investigated. The characteristics of cell growth, hydrogen production, and fermentation end-products with the addition of different concentrations of furfural (0–20 mM) were studied. The results showed that furfural negatively affected the maximum hydrogen production rate and total hydrogen yield. The maximum hydrogen yield of 2.59 ± 0.13 mol-H<sub>2</sub>/mol-glucose was obtained without furfural. However, 5 mM furfural showed a 40% increase in cell concentration. Furfural in high concentrations can favor the overproduction and accumulation of inhibitive end-products. Further analysis of energy conversion efficiency showed that most of the energy in the substrate was underused and unconverted when the furfural concentration was high. The maximum glucose consumption (93%) was achieved without furfural, while it dramatically declined to 7% with 20 mM furfural addition. The index of half-maximal inhibitory concentration was calculated as 13.40 mM. Moreover, the possible metabolic pathway of furfural and glucose was discussed. |
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| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T00:28:47Z |
| publishDate | 2022-08-01 |
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| spelling | doaj.art-97d75b0e408f471faa751c3b5a9ddf592023-11-23T15:30:22ZengMDPI AGCatalysts2073-43442022-08-0112997910.3390/catal12090979Furfural Influences Hydrogen Evolution and Energy Conversion in Photo-Fermentation by <i>Rhodobacter capsulatus</i>Wen Cao0Xuan Wei1Youmin Jiang2Jiali Feng3Zixuan Gao4Canfang Tang5State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaFurfural, as a typical byproduct produced during the hydrolysis of lignocellulose biomass, is harmful to the photo fermentation hydrogen production. In this work, the effects of furfural on the photo fermentation hydrogen production by <i>Rhodobacter capsulatus</i> using glucose as substrate were investigated. The characteristics of cell growth, hydrogen production, and fermentation end-products with the addition of different concentrations of furfural (0–20 mM) were studied. The results showed that furfural negatively affected the maximum hydrogen production rate and total hydrogen yield. The maximum hydrogen yield of 2.59 ± 0.13 mol-H<sub>2</sub>/mol-glucose was obtained without furfural. However, 5 mM furfural showed a 40% increase in cell concentration. Furfural in high concentrations can favor the overproduction and accumulation of inhibitive end-products. Further analysis of energy conversion efficiency showed that most of the energy in the substrate was underused and unconverted when the furfural concentration was high. The maximum glucose consumption (93%) was achieved without furfural, while it dramatically declined to 7% with 20 mM furfural addition. The index of half-maximal inhibitory concentration was calculated as 13.40 mM. Moreover, the possible metabolic pathway of furfural and glucose was discussed.https://www.mdpi.com/2073-4344/12/9/979furfuralhydrogenphoto fermentationmetabolic mechanismenergy conversion efficiency |
| spellingShingle | Wen Cao Xuan Wei Youmin Jiang Jiali Feng Zixuan Gao Canfang Tang Furfural Influences Hydrogen Evolution and Energy Conversion in Photo-Fermentation by <i>Rhodobacter capsulatus</i> Catalysts furfural hydrogen photo fermentation metabolic mechanism energy conversion efficiency |
| title | Furfural Influences Hydrogen Evolution and Energy Conversion in Photo-Fermentation by <i>Rhodobacter capsulatus</i> |
| title_full | Furfural Influences Hydrogen Evolution and Energy Conversion in Photo-Fermentation by <i>Rhodobacter capsulatus</i> |
| title_fullStr | Furfural Influences Hydrogen Evolution and Energy Conversion in Photo-Fermentation by <i>Rhodobacter capsulatus</i> |
| title_full_unstemmed | Furfural Influences Hydrogen Evolution and Energy Conversion in Photo-Fermentation by <i>Rhodobacter capsulatus</i> |
| title_short | Furfural Influences Hydrogen Evolution and Energy Conversion in Photo-Fermentation by <i>Rhodobacter capsulatus</i> |
| title_sort | furfural influences hydrogen evolution and energy conversion in photo fermentation by i rhodobacter capsulatus i |
| topic | furfural hydrogen photo fermentation metabolic mechanism energy conversion efficiency |
| url | https://www.mdpi.com/2073-4344/12/9/979 |
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