کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
678713 | 888665 | 2009 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simultaneous saccharification and fermentation (SSF) of very high gravity (VHG) potato mash for the production of ethanol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
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چکیده انگلیسی
Simultaneous saccharification and fermentation (SSF) of very high gravity (VHG) potato mash, containing 304 g Lâ1 of dissolved carbohydrates, was carried out for ethanol production. Potato tubers were ground into a mash, which was highly viscous. Mash viscosity was reduced by the pretreatment with mixed enzyme preparations of pectinase, cellulase and hemicellulase. The enzymatic pretreatment established the use of VHG mash with a suitable viscosity. Starch in the pretreated mash was liquefied to maltodextrins by the action of thermo-stable α-amylase at 85 °C. SSF of liquefied mash was performed at 30 °C with the simultaneous addition of glucoamylase, yeast (Saccharomyces cerevisiae) and ammonium sulfate as a nitrogen source for the yeast. The optimal glucoamylase loading, ammonium sulfate concentration and fermentation time were 1.65 AGU gâ1, 30.2 mM and 61.5 h, respectively, obtained using the response surface methodology (RSM). Ammonium sulfate supplementation was necessary to avoid stuck fermentation under VHG condition. Using the optimized condition, ethanol yield of 16.61% (v/v) was achieved, which was equivalent to 89.7% of the theoretical yield.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 33, Issue 5, May 2009, Pages 890-898
Journal: Biomass and Bioenergy - Volume 33, Issue 5, May 2009, Pages 890-898
نویسندگان
Sathaporn Srichuwong, Maki Fujiwara, Xiaohui Wang, Tomoko Seyama, Riki Shiroma, Mitsuhiro Arakane, Nobuhiro Mukojima, Ken Tokuyasu,