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首页> 外文期刊>Bioprocess and Biosystems Engineering >Effect of organic acids found in cottonseed hull hydrolysate on the xylitol fermentation by Candida tropicalis
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Effect of organic acids found in cottonseed hull hydrolysate on the xylitol fermentation by Candida tropicalis

机译：棉籽壳水解物中发现的有机酸对热带假丝酵母木糖醇发酵的影响

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摘要

Five organic acids (acetic, ferulic, 4-hydroxy-benzoic, formic and levulinic acids) typically associated in the hemicellulose hydrolysate were selected to study their effects on the xylitol fermentation. The effects of individual and combined additions were independently evaluated on the following parameters: inhibitory concentration; initial cell concentration; pH value; and membrane integrity. The results showed that the toxicities of organic acids were related to their hydrophobility and significantly affected by the fermentative pH value. In addition, it was revealed that the paired combinations of organic acids did not impose synergetic inhibition. Moreover, it was found that the fermentation inhibition could be alleviated with the simple manipulations by increasing the initial cell concentration, raising the initial pH value and minimizing furfural levels by evaporation during the concentration of hydrolysates. The proposed strategies for minimizing the negative effects could be adopted to improve the xylitol fermentation in the industrial applications.
机译：选择半纤维素水解物中通常相关的五种有机酸（乙酸，阿魏酸，4-羟基苯甲酸，甲酸和乙酰丙酸）来研究它们对木糖醇发酵的影响。在以下参数上独立评估单独添加和组合添加的效果：抑制浓度；初始细胞浓度酸碱值;和膜的完整性。结果表明，有机酸的毒性与其疏水性有关，并且受发酵pH值的影响很大。另外，揭示了有机酸的配对组合没有施加协同抑制作用。此外，发现通过在水解物浓缩期间通过蒸发增加初始细胞浓度，提高初始pH值和最小化糠醛水平，可以通过简单的操作来减轻发酵抑制。所提出的使负面影响最小化的策略可被采用来改善工业应用中的木糖醇发酵。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2013年第8期|1053-1061|共9页
  • 作者

    Le Wang; Dapeng Wu; Pingwah Tang; Qipeng Yuan;

  • 作者单位

    College of Life Science and Technology, Beijing University of Chemical Technology, No. 15 North Third Ring East Road, Chaoyang District, 100029 Beijing, China,College of Bioengineering, Henan University of Technology, 450000 Zhengzhou, China;

    College of Chemistry and Chemical Engineering, Henan Normal University, 453002 Xinxiang, China;

    College of Life Science and Technology, Beijing University of Chemical Technology, No. 15 North Third Ring East Road, Chaoyang District, 100029 Beijing, China;

    College of Life Science and Technology, Beijing University of Chemical Technology, No. 15 North Third Ring East Road, Chaoyang District, 100029 Beijing, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Xylitol; Fermentation; Inhibitors; Organic acids; Candida tropicalis;

    机译：木糖醇;发酵;抑制剂;有机酸;热带假丝酵母;

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