Short-term adaptation improves the fermentation performance of Saccharomyces cerevisiae in the presence of acetic acid at low pH
| Autor: | Venkatachalam Narayanan, Marie-Francoise Gorwa-Grauslund, Violeta Sànchez i Nogué |
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| Rok vydání: | 2013 |
| Předmět: |
Saccharomyces cerevisiae
Lignocellulosic biomass Acetic acid Lignin Applied Microbiology and Biotechnology Hydrolysate chemistry.chemical_compound Bioenergy and Biofuels Hemicellulose Ethanol fuel Anaerobiosis Food science Ethanol biology pH Chemistry Short-term adaptation General Medicine Hydrogen-Ion Concentration biology.organism_classification Adaptation Physiological Biochemistry Fermentation Biotechnology |
| Zdroj: | Applied Microbiology and Biotechnology |
| ISSN: | 1432-0614 0175-7598 |
| Popis: | The release of acetic acid due to deacetylation of the hemicellulose fraction during the treatment of lignocellulosic biomass contributes to the inhibitory character of the generated hydrolysates. In the present study, we identified a strain-independent adaptation protocol consisting of pre-cultivating the strain at pH 5.0 in the presence of at least 4 g L⁻¹ acetic acid that enabled aerobic growth and improved fermentation performance of Saccharomyces cerevisiae cells at low pH (3.7) and in the presence of inhibitory levels of acetic acid (6 g L⁻¹). During anaerobic cultivation with adapted cells of strain TMB3500, the specific ethanol production rate was increased, reducing the fermentation time to 48 %. |
| Databáze: | OpenAIRE |
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