Ultrasonic-assisted simultaneous saccharification and fermentation of pretreated oil palm fronds for sustainable bioethanol production

• Published in: Fuel (Guildford) Vol. 119; pp. 285 - 291
• Main Authors: Ofori-Boateng, Cynthia, Lee, Keat Teong
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.03.2014; Elsevier
• Subjects: Applied sciences; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fuels; Oil palm fronds; Organosolv pretreatment; Ultrasound, bioethanol, simultaneous saccharification and fermentation; Oil palm fronds; Ultrasound, bioethanol, simultaneous saccharification and fermentation; Organosolv pretreatment; Palm oil; Saccharification; Pretreatment; Fermentation; Ultrasound
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2013.11.064

•Palm fronds were pretreated using ultrasonic-assisted organosolv/H2O2 method.•Simultaneous saccharification and fermentation (SSF) of palm fronds by ultrasound.•Optimum conditions: 5h, 40°C, pH 5.0, yeast conc. 15g/l, solid loading 10% w/v.•Maximal ethanol conc. (18.15g/l) and yield (57.02%) at optimum SSF conditions. Ultrasonic-assisted simultaneous saccharification and fermentation (SSF) of modified organosolv pretreated oil palm fronds (OPFs) for sustainable production of bioethanol was investigated for the first time in this study. Ultrasound application in industrial processes is able to reduce the process temperature and time, which eventually improves the energy utilization for sustainable production. According to this study, the ultrasonic-assisted SSF of pretreated OPFs was found to improve the bioethanol yield significantly at shorter times compared to the SSF processes without ultrasound. Optimization of the ultrasonic-assisted SSF process resulted in maximal bioethanol concentration (18.2g/l) and yield (57.0%) at optimum SSF time (5h), temperature (40°C), pH (5.0), yeast concentration (15g/l) and solid loading (10% (w/v)). SSF coupled with ultrasound was found as a sustainable way of producing high bioethanol titre from organosolv/H2O2 pretreated OPFs.