Optimization of ethanol production from hot-water extracts of sugar maple chips

Author

Jian Xu and Shijie Liu

Renewable Energy, 2009, vol. 34, issue 11, pages 2353-2356

Abstract: Hot-water extracts from sugar maple chips prior to papermaking was employed in this study to produce ethanol by Pichia stipitis 58784. The effects of several factors, seed culture age, fermentation time, inoculum quantity, agitation rate, percent extract, concentration of inorganic nitrogen source (NH4)2SO4 and pH value, on ethanol production were investigated by orthogonal experiments. Orthogonal analysis shows that the optimal fermentation was obtained in the condition of 48-h seed culture, 120-h fermentation, 16% inoculum, 180rpm, containing 30% extracts, 8% ammonium sulphate supplement and pH 5. This optimal condition was verified at 800-mL level in a 1.3L fermentor. The ethanol yield reached 82.27% of the theoretical (20.57g/L) after 120h.

Keywords: Hot-water extracts; Sugar maple chips; Ethanol; Pichia stipitis 58784; Orthogonal analysis (search for similar items in EconPapers)
Date: 2009
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