Tuesday, April 20, 2010
8-84
Optimization of bioethanol production from NaOH-pretreated barley straw using response surface methodology
Lignocellulosic materials are regarded as an alternative energy source for bioethanol production to reduce our reliance on fossil fuels. Pretreatment is important for improving the enzymatic digestibility and fermentation yield. In this study, barley straw was pretreated by using NaOH, to produce bioethanol. Also the optimum conditions of pretreatment were investigated by using response surface methodology (RSM). The independent variables for pretreatment were selected as pretreatment temperature, time and NaOH concentration. The best condition of pretreatment was determined to be 129.02 °C, 3.23 h and 12.58 % of temperature, reaction time and NaOH concentration, respectively. After pretreatment the enzymatic hydrolysis was performed 40 FPU/g cellulose of cellulase enzyme loading, which led to delignification of 71.50% glucose concentration of 31.61 g/L. Fermentation of hydrolyzed barely straw by Saccharomyces cerevisiae result in 15.36 g/L of ethanol concentration. Although a lot of enzymes were used and generated ethanol concentration was low, this results may provide useful information with regard to the development of more economic and efficient bioethanol production.
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See more of The 32nd Symposium on Biotechnology for Fuels and Chemicals (April 19-22, 2010)
See more of General Submissions
See more of The 32nd Symposium on Biotechnology for Fuels and Chemicals (April 19-22, 2010)