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Title: Mild Alkaline Pretreatment can Achieve High Hydrolytic and Fermentation Efficiencies for Rice Straw Conversion to Bioethanol
Authors: Ashoor, S
Sukumaran, C
Keywords: bioethanol
rice straw
Issue Date: 1-Sep-2020
Publisher: Informa UK Limited
Citation: Preparative Biochemistry & Biotechnology;50(8):814-819
Abstract: Mild alkaline pretreatment was evaluated as a strategy for effective lignin removal and hydrolysis of rice straw. The pretreatment efficiency of different NaOH concentrations (0.5, 1.0, 1.5 or 2.0% w/w) was assessed. Rice straw (RS) pretreated with 1.5% NaOH achieved better sugar yield compared to other concentrations used. A cellulose conversion efficiency of 91% (45.84 mg/ml glucose release) was attained from 1.5% NaOH pretreated rice straw (PRS), whereas 1% NaOH pretreated rice straw yielded 35.10 mg/ml of glucose corresponding to a cellulose conversion efficiency of 73.81%. The ethanol production from 1% and 1.5% NaOH pretreated RS hydrolysates was similar at ∼3.3% (w/v), corresponding to a fermentation efficiency of 86%. The non-detoxified hydrolysate was fermented using the novel yeast strain Saccharomyces cerevisiae RPP-03O without any additional supplementation of nutrients.
Appears in Collections:2020

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