Authors: ZhaoYong Sun Ting Wang Li Tan YueQin Tang Kenji Kida
Publish Date: 2015/01/21
Volume: 38, Issue: 6, Pages: 1033-1043
Abstract
A process for production of fuel ethanol from bamboo treated with concentrated sulfuric acid has been previously proposed To improve efficiency of the process we tested saccharification with 70 weight wt sulfuric acid acid–sugar separation by ion exclusion addition of nutrients to the ethanol fermentation and bioconversion of xylose to xylitol A high efficiency of both sugar recovery 825 and acid recovery 975 was achieved in the saccharification process and in the continuous acid–sugar separation using a modified anion exchange resin respectively Reduction of the amount of mineral salts added to the saccharified liquid after acid–sugar separation did not negatively affect performance of the continuous ethanol fermentation The ethanol yield and productivity were 937 and 6 g/l h respectively at 35 °C and pH 40 And the ethanol yield and productivity were almost the same even at pH 35 Moreover the xylose remaining in the fermented mash was efficiently converted to xylitol in batch fermentation by Candida tropicalis strain 21776 These results demonstrate a more efficient process for the production of fuel ethanol from bamboo
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