首页> 外文会议>Thirtieth Annual Biochemical Engineering Symposium, Sep 15-16, 2000, Boulder, Colorado >Comparative Ethanol Fermentation Performance of Xylose-Utilizing Zymomonas mobilis Strains in Mixed Glucose-Xylose Media
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Comparative Ethanol Fermentation Performance of Xylose-Utilizing Zymomonas mobilis Strains in Mixed Glucose-Xylose Media

机译:混合葡萄糖-木糖培养基中利用木糖运动发酵单胞菌菌株的乙醇发酵性能比较。

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摘要

Renewable biomass feedstocks and agricultural residues are mainly composed of cellulose, hemicellulose and lignin. Historically, high-yield ethanolic fermentation of the pentose sugars D-xylose and L-arabinose that are prevalent in most biomass hemicelluloses has been hindered by the absence of efficient pentose-fermenting microorganisms. Recently, strains of Zymomonas mobilis have been metabolically engineered to broaden their substrate utilization range to include D-xylose and L-arabinose. These metabolically engineered Z. mobilis strains can efficiently ferment both xylose and arabinose to ethanol. Work is now underway to better understand pentose metabolism in these novel strains. We report here on the comparative fermentation performance characteristics of several different xylose-fermenting Z. mobilis strains growing on a glucose-xylose mixture.
机译:可再生的生物质原料和农业残留物主要由纤维素,半纤维素和木质素组成。历史上,由于缺乏有效的戊糖发酵微生物,阻碍了在大多数生物质半纤维素中普遍存在的戊糖D-木糖和L-阿拉伯糖的高产乙醇发酵。最近,运动发酵单胞菌(Zymomonas mobilis)菌株已经被代谢工程化以扩大其底物利用范围,包括D-木糖和L-阿拉伯糖。这些代谢工程化的运动发酵单胞菌菌株可以有效地将木糖和阿拉伯糖发酵成乙醇。现在正在开展工作,以更好地了解这些新菌株中的戊糖代谢。我们在这里报告在葡萄糖-木糖混合物上生长的几种不同的木糖发酵运动发酵单胞菌菌株的比较发酵性能特征。

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