3-14-15 高温発酵性酵母を用いた新2段階発酵法によるグルコース・キシロースからのバイオエタノール生産(Session 3 バイオマス等)

概要

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We reported the novel bioethanol production system using S. cerevisiae and P stipitis from a mixture of glucose and xylose. Firstly, mixture of glucose and xylose was fermented by S cerevisiae. When glucose was converted bioethanol completely, the fermented broth was treated by gas-stripping method in order to remove the ethanol. Secondly, the treated broth was fermented by P. stipitis. To improve the efficiency of xylose fermentation, it is necessary to remove the ethanol from fermentation broth. We isolated the high temperature fermentability yeast cells named SS4-5 from soil in Japanese mountain. This SS4-5 can produce the bioethanol at 44℃ from glucose. When we used the SS4-5 instead of S. cerevisiae in novel two-step fermentation system, the bioethanol production and bioethanol volatilization were occurred simultaneously at 42-C. Since we can delete the ethanol removing process in novel two step fermentation, low cost bioethanol production was achieved using this system.
2012-07-30