Cellulosic Ethanol: Improving Cost Efficiency by Coupling Semi-Continuous Fermentation and Simultaneous Saccharification Strategies

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 t...

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Bibliographic Details
Published in:Processes 2020-11, Vol.8 (11), p.1459
Main Authors: Portero Barahona, Patricia, Bastidas Mayorga, Bernardo, Martín-Gil, Jesús, Martín-Ramos, Pablo, Carvajal Barriga, Enrique Javier
Format: Article
Language:English
Subjects:
Bagasse
Biomass
Cellulose
Control stability
Depletion
Enzymes
Ethanol
Fermentation
Glucose
Laboratories
Lignin
Lignocellulose
Pretreatment
R&D
Research & development
Saccharification
Sodium hydroxide
Sugarcane
Yeast
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Summary: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.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr8111459