Cellulosic ethanol: Improving cost efficiency by coupling semi-continuous fermentation and simultaneous saccharification strategies

Portero Barahona, Patricia ; Bastidas Mayorga, Bernardo ; Martín Gil, Jesús ; Martín Ramos, Pablo (Universidad de Zaragoza) ; Carvajal Barriga, Enrique J.

Resumen: 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 (130–170 °C) and times (10–30 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.

Idioma: Inglés

DOI: 10.3390/pr8111459

Año: 2020

Publicado en: PROCESSES 8, 11 (2020), 1459 [13 PP.]
ISSN: 2227-9717

Factor impacto JCR: 2.847 (2020)

Categ. JCR: ENGINEERING, CHEMICAL rank: 74 / 143 = 0.517 (2020) - Q3 - T2

Factor impacto SCIMAGO: 0.413 - Bioengineering (Q2) - Process Chemistry and Technology (Q2) - Chemical Engineering (miscellaneous) (Q2)

Tipo y forma: Article (Published version)

Área (Departamento): Area Ingeniería Agroforestal (Dpto. CC.Agrar.y Medio Natural)