Defatted rice bran pretreated with deep eutectic solvents and sequential use as feedstock for subcritical water hydrolysis
2022
Moreira, Bárbara P. | Draszewski, Crisleine P. | Celante, Dian | Brondani, Leoni | Lachos-Perez, Daniel | Mayer, Flávio D. | Abaide, Ederson R. | Castilhos, Fernanda
Deffated rice bran has potential to processing into ethanol due to its lignocellulosic composition and agricultural productivity. The composition of the pretreated deffated rice bran with Deep Eutectic Solvent was investigated aiming the production of sugars and bioproducts using subcritical water hydrolysis. Changes in the deffated rice bran composition at different pretreatment times and mixtures of deep eutectic solvent were evaluated by the derivative of thermogravimetric analysis. The pretreated deffated rice bran presented an enrichment in the content of hemicelluloses (281.0%) and delignification (59.3 %). Under the same condition of subcritical water hydrolysis (230 °C/R-100) the yield of fermentable sugars increased 2.20 times in the same study time interval (20 min) when comparing pretreated and untreated deffated rice bran.
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