Maximizing Bioethanol Production from Eucalyptus globulus Using Steam Explosion Pretreatment: A Multifactorial Design and Fermenter Development for High Solid Loads
Maximizing Bioethanol Production from Eucalyptus globulus Using Steam Explosion Pretreatment: A Multifactorial Design and Fermenter Development for High Solid Loads
Authors
Troncoso Ortega, Eduardo
Valenzuela, Roberto
Reyes Contreras, Pablo
Castano Rivera, Patricia
Schiappacasse, L Nicolas
Parra, Carolina
Valenzuela, Roberto
Reyes Contreras, Pablo
Castano Rivera, Patricia
Schiappacasse, L Nicolas
Parra, Carolina
Profesor GuĆa
Authors
Date
Datos de publicaciĆ³n:
10.3390/fermentation9110965
FERMENTATION-BASEL,Vol.9,2023
FERMENTATION-BASEL,Vol.9,2023
Tipo de recurso
Article
Keywords
Materia geogrƔfica
Collections
Abstract
Steam explosion pretreatment is suitable for bioethanol production from Eucalyptus globulus wood. Multifactorial experiment designs were used to find the optimal temperature and residence time required to obtain the best glucose yield from the enzymatic hydrolysis of pretreated materials. The chemical composition, crystallinity index, morphology and polymerization degree of the pretreated materials were correlated with enzymatic accessibility. Simultaneous saccharification and fermentation (SSF) using a fed-batch strategy was applied to three different laboratory-scale fermenters. The optimization of the pretreatment was obtained at 208 degrees C and 11 min. However, the enzymatic hydrolysis performance did not show significant differences from the material obtained at 196 degrees C and 9.5 min, which was determined to be the real optimum, owing to its lower energy requirement. The vertical fermenter with type 'G' blades and the horizontal fermenter with helical blades were both highly efficient for reaching ethanol yields close to 90% based on dry wood, and ethanol concentrations close to 9.0% v/v.