Comparative evaluation of the mesophilic and thermophilic biohydrogen production at optimized conditions using tequila vinasses as substrate
| Autor: | Alma Toledo-Cervantes, Jorge Arreola-Vargas, Francisco Villafán-Carranza, Hugo Oscar Méndez-Acosta, Elías Razo-Flores |
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| Rok vydání: | 2020 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Thermophile Energy Engineering and Power Technology Substrate (chemistry) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Comparative evaluation Butyric acid chemistry.chemical_compound Fuel Technology Fermentation Biohydrogen Food science 0210 nano-technology Anaerobic exercise Mesophile |
| Zdroj: | International Journal of Hydrogen Energy. 45:11000-11010 |
| ISSN: | 0360-3199 |
| Popis: | The objective of this work was to comparatively evaluate the production of biohydrogen (bio-H2) from tequila vinasses at optimized mesophilic and thermophilic conditions and to elucidate the main metabolic routes involved. Optimal temperatures of 35 °C and 55 °C, and pH of 5.5 maximized the bio-H2 production rates, 25.5 ± 0.01 NmL h−1 and 169.9 ± 8.9 NmL h−1 in the mesophilic and thermophilic regimens, respectively. During the operation of anaerobic sequencing batch reactors, the thermophilic process allowed a volumetric bio-H2 production rate of 519 ± 13 NmL-H2 L−1 d−1 equivalent to 750 ± 19 NmL-H2 Lvinasse−1, while the mesophilic one 448 ± 23 NmL-H2 L−1 d−1 and 647 ± 33 NmL-H2 Lvinasse−1, respectively. Furthermore, the gas produced under thermophilic conditions showed high hydrogen content (86.5%). Finally, formate degradation and glucose fermentation to acetic and butyric acids were the main metabolic routes involved in bio-H2 production under thermophilic conditions, while at mesophilic conditions, the lactate and formate degradation pathways governed. |
| Databáze: | OpenAIRE |
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