Biochemical butyrate production via dark fermentation as an energetically efficient alternative management approach for vinasse in sugarcane biorefineries
| Autor: | Graciete Mary dos Santos, Bruna de Souza Moraes, Ariovaldo José da Silva, Lucas Tadeu Fuess, Tiago Palladino Delforno |
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| Rok vydání: | 2020 |
| Předmět: |
Acidogenesis
060102 archaeology Renewable Energy Sustainability and the Environment 020209 energy Vinasse 06 humanities and the arts 02 engineering and technology Butyrate Dark fermentation Isobutyric acid chemistry.chemical_compound chemistry 0202 electrical engineering electronic engineering information engineering Malolactic fermentation 0601 history and archaeology Fermentation Biohydrogen Food science |
| Zdroj: | Renewable Energy. 158:3-12 |
| ISSN: | 0960-1481 |
| Popis: | This study investigated the application of dark fermentation to obtain value-added soluble metabolite products (SMP) from vinasse as a strategy to enhance the energy efficiency in sugarcane biorefineries. Batch tests comparing sucrose and vinasse as the substrates were conducted, providing data to both understand conversion pathways and measure the energetic implications of fermenting vinasse under controlled conditions. Two distinct inoculum pretreatment methods, namely, acid-thermal and thermal were also assessed. Overall, butyrate fermentation was the primary conversion pathway observed in vinasse acidogenesis, leading to butyric/isobutyric acid concentrations over 6.0 g L−1, irrespective of the inoculum pretreatment. Lactic and malic acids were the primary substrates, with the predominance of the lactate-to-butyrate fermentation, suggesting the establishment of a syntrophic relation between lactate-producing bacteria and clostridial populations. Considering energetic aspects, the enhanced butyrate production could lead to an energy recovery potential of 30.9–33.4 MW, outcompeting highly-efficient biohydrogen- ( |
| Databáze: | OpenAIRE |
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