Potential of Thermotolerant Ethanologenic Yeasts Isolated from ASEAN Countries and Their Application in High- Temperature Fermentation

Tomoyuki Kosaka, N. Lertwattanasakul, NadchanokRodrussamee, M. Nurcholis, N. Dung, Chansom Keo-oudone, M. Murata, P. Götz, ConstantinosTheodoropoulos, Suprayogi, J. M. Maligan, S. Limtong, M. Yamada
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引用次数: 12

Abstract

Thermotolerant ethanologenic yeasts receive attention as alternative bio-ethanol producers to traditionally used yeast, Saccharomyces cerevisiae. Their utilization is expected to provide several benefits for bio-ethanol production due to their characteristics and robustness. They have been isolated from a wide variety of environments in a number of ASEAN countries: Thailand, Vietnam, Laos, and Indonesia. One of these yeasts, Kluyveromyces marxianus has been investigated regarding characteristics. Some strains efficiently utilize xylose, which is a main component of the 2nd generation biomass. In addition, the genetic basis of K. marxianus has been revealed by genomic sequencing and is exploited for further improvement of the strains by thermal adaptation or gene engineering techniques. Moreover, the glucose repression of K. marxianus and its mechanisms has been investigated. Results suggest that K. marxianus is an alternative to S. cerevisiae in next-generation bio-ethanol production industry. Indeed, we have succeeded to apply K. marxianus for bio-ethanol production in a newly developed process, which combines high-temperature fermentation with simultaneous fermentation and distillation under low pressure. This chapter aims to provide valuable information on thermotolerant ethanologenic yeasts and their application, which may direct the economic bioproduction of ethanol and other useful materials in the future.
东盟国家耐热产酒酵母的潜力及其在高温发酵中的应用
耐热产乙醇酵母作为传统使用的酵母,酿酒酵母的替代生物乙醇生产者受到关注。由于它们的特性和稳健性,它们的利用有望为生物乙醇生产提供一些好处。它们与泰国、越南、老挝和印度尼西亚等东盟国家的各种环境隔绝开来。其中一种酵母,马氏克卢维酵母(Kluyveromyces marxianus)已被研究其特性。木糖是第二代生物量的主要成分,部分菌株对木糖的利用效率较高。此外,通过基因组测序揭示了K. marxianus的遗传基础,并利用热适应或基因工程技术进一步改进菌株。此外,还对马氏酵母的葡萄糖抑制作用及其机制进行了研究。结果表明,马氏K. marxianus是下一代生物乙醇生产工业中酿酒葡萄球菌的替代品。事实上,我们已经成功地将K. marxianus应用于生物乙醇生产的新工艺中,该工艺将高温发酵与低压同时发酵和蒸馏相结合。本章旨在提供耐热产乙醇酵母及其应用方面的有价值的信息,以指导未来乙醇和其他有用材料的经济生物生产。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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