Ethanol production by repeated-batch simultaneous saccharification and fermentation (SSF) of alkali-treated rice straw using immobilized Saccharomyces cerevisiae cells
详细信息 查看全文
- 作者：Itsuki Watanabe ; Naonori Miyata ; Akira Ando ; Riki Shiroma ; Ken Tokuyasu ; Toshihide Nakamura
- 关键词：Immobilized yeast ; Photocrosslinkable resin ; Repeated-batch ; Rice straw ; Simultaneous saccharification and fermentation (SSF)
- 刊名：Bioresource Technology
- 出版年：2012
- 出版时间：November, 2012
- 年：2012
- 卷：123
- 期：Complete
- 页码：695-698
- 全文大小：533 K
文摘
Repeated-batch simultaneous saccharification and fermentation (SSF) of alkali-treated rice straw using immobilized yeast was developed to produce ethanol. Saccharomyces cerevisiae cells were immobilized by entrapping in photocrosslinkable resin beads, and we evaluated the possibility of its reuse and ethanol production ability. In batch SSF of 20 % (w/w) rice straw, the ethanol yields based on the glucan content of the immobilized cells were slightly low (76.9 % of the theoretical yield) compared to free cells (85.2 % of the theoretical yield). In repeated-batch SSF of 20 % (w/w) rice straw, stable ethanol production of approx. 38 g L?1 and an ethanol yield of 84.7 % were obtained. The immobilizing carrier could be reused without disintegration or any negative effect on ethanol production ability.