کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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682581 | 888986 | 2010 | 6 صفحه PDF | دانلود رایگان |
To obtain high concentration of ethanol from cellulose, corncob was pretreated with acid and alkali to remove non-cellulose components, and then subjected to simultaneous saccharification and fermentation (SSF). An ethanol concentration as high as 69.2 g/L was achieved with 19% dry matter (DM) using batch SSF, resulting in an 81.2% overall ethanol yield. A fed-batch process using a high solid concentration was also investigated. Fresh substrate was pretreated with dilute sulfuric acid–sodium hydroxide, and then added at different amounts during the first 24 h, to yield a final dry matter content of 25% (w/v). SSF conditions with cellulose loading of 22.8 FPU/g glucan, dry yeast (Saccharomyces cerevisiae) loading of 5 g/L and substrate supplementation every 4 h yielded the highest ethanol concentration of 84.7 g/L after 96 h. This corresponded to a 79% overall ethanol yield.
Journal: Bioresource Technology - Volume 101, Issue 13, July 2010, Pages 4959–4964