Alkali Pretreatment and Enzymatic Hydrolysis of Australian Timber Mill Sawdust for Biofuel Production. (22nd October 2015)

• Record Type: Journal Article
• Authors: Trevorah, Raymond Martin; Othman, Maazuza Z.
• Other Names: Liu Siqing Academic Editor.
• Is Part Of: Journal of renewable energy. Volume 2015(2015)
• Publication Date: 2015-10-22
• Subjects: Renewable energy sources -- Periodicals; Renewable energy sources; Electronic journals; Periodicals; Electronic journals; 621.042
• DOI: 10.1155/2015/284250
• Languages: English
• ISSNs: 2314-4386

Abstract

Abstract : This study investigated the potential use of alkali pretreatment of sawdust from Australian timber mills to produce bioethanol. Sawdust was treated using 3–10% w/w NaOH at temperatures of 60, 121, and −20°C. Two pathways of production were trialled to see the impact on the bioethanol potential, enzymatic hydrolysis for glucose production, and simultaneous saccharification and fermentation (SSF) for ethanol production. The maximum yields obtained were at 121°C and −20°C using 7% NaOH, with 29.3% and 30.6% ethanol yields after 0.5 and 24 hr, respectively, these treatments yielded 233% and 137% increase from the 60°C counter parts. A notable trend of increased ethanol yields with increased NaOH concentration was observed for samples treated at 60°C; for example, samples treated using 10% NaOH produced 1.92–2.07 times more than those treated using 3% NaOH. FTIR analysis showed reduction in crystallinity correlating with increased ethanol yields with the largest reduction in crystallinity in the sample treated at −20°C for 24 hr with 7% NaOH.