Cellulosic ethanol: Improving cost efficiency by coupling semi-continuous fermentation and simultaneous saccharification strategies
| Autor: | Bernardo Bastidas Mayorga, Patricia Portero Barahona, Enrique Javier Carvajal Barriga, Jesús Martín-Gil, Pablo Martín-Ramos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
enzymes
0211 other engineering and technologies semi-continuous culture Bioengineering 02 engineering and technology 010501 environmental sciences lcsh:Chemical technology 01 natural sciences lcsh:Chemistry chemistry.chemical_compound Hydrolysis Chemical Engineering (miscellaneous) lcsh:TP1-1185 Ethanol fuel 021108 energy bioethanol 0105 earth and related environmental sciences Ethanol Process Chemistry and Technology pretreatment Pulp and paper industry sugarcane bagasse lcsh:QD1-999 chemistry Biofuel Sodium hydroxide Cellulosic ethanol Fermentation Bagasse |
| Zdroj: | Zaguán: Repositorio Digital de la Universidad de Zaragoza Universidad de Zaragoza Processes, Vol 8, Iss 1459, p 1459 (2020) Zaguán. Repositorio Digital de la Universidad de Zaragoza instname Processes Volume 8 Issue 11 |
| Popis: | A novel approach to improve ethanol production from sugarcane bagasse is proposed. Biomass was pretreated with sodium hydroxide, sulfuric, oxalic, and maleic acids (1% w/v) at different temperatures (130&ndash 170 ° C) and times (10&ndash 30 min). The pretreatment with NaOH at 160 ° C for 20 min was found to be the most efficient for further enzymatic saccharification. A semi-continuous fermentation system coupled with a simultaneous saccharification and fermentation strategy was used, attaining fermented liquor every 24 h. The amount of enzymes needed for saccharification was optimized, as well as the production time and ethanol concentration. The process occurred with near to complete depletion of glucose, obtaining ethanol concentrations ranging from 8.36 to 10.79% (v/v). The whole system, at bench scale, showed stability over 30 days, and ease of management and control. This strategy may improve cost efficiency in the production of cellulosic ethanol at industrial scale. |
| Databáze: | OpenAIRE |
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