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首页> 外文期刊>Fuel >Dark fermentative bio-hydrogen production: Effects of substrate pre-treatment and addition of metal ions or L-cysteine
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Dark fermentative bio-hydrogen production: Effects of substrate pre-treatment and addition of metal ions or L-cysteine

机译：深色发酵生物氢的产生：底物预处理和添加金属离子或L-半胱氨酸的影响

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摘要

H_2 is regarded as a promising energy resource because of its high energy content (122 kJ/g), and since capable of replacing fossil energy sources. To enhance the hydrogen production, two pure bacterial strains were jointly applied as mixed cultures in a single fermenter, thus combining the starch hydrolysis process and H_2 production process. Strain Al was responsible for starch hydrolysis by producing amylase and strain B1 was in charge of hydrogen production. Since the starch pre-treatment conduces to starch hydrolysis and the metal ions are the important elements of hydrogenase, the hydrogen production using corn starch was moreover assessed when either pre-treating the starch feed, or by adding Fe~(2+) or Mg~(2+), possibly in association with L-cysteine. The cumulative H_2 production increased as average of triplicate experiments from 838 to 1186 mL when the corn starch was pre-treated by boiling. The H_2 production rate of pre-treated corn starch was much higher than that of untreated corn starch. The H_2 yield of pre-treated corn starch reached 1.19 mol H_2/mol glucose, 40% higher than using untreated corn starch (0.85 mol H_2/mol glucose). By adding trace elements (Fe~(2+) and Mg~(2+)) and L-cysteine, the H_2 yields were higher than for the control, except when adding Mg~(2+). The enhancement of the H_2 production by the sole addition of Fe~(2+) and L-cysteine was significant (by 105% and 60%, respectively). The sole addition of Fe~(2+) to the system had the highest effect with a maximum cumulative H_2 production of 1928 mL and H_2 yield of 1.94 mol H_2/mol glucose.
机译：H_2具有很高的能量含量（122 kJ / g），并且能够替代化石能源，因此被认为是有前途的能源。为了提高产氢量，将两种纯细菌菌株作为混合培养物联合应用在单个发酵罐中，从而将淀粉水解过程和H_2产生过程结合在一起。 Al菌株通过产生淀粉酶负责淀粉水解，而B1菌株负责产生氢气。由于淀粉预处理会导致淀粉水解，并且金属离子是加氢酶的重要元素，因此，在对淀粉进料进行预处理或添加Fe〜（2+）或Mg时，还要评估使用玉米淀粉制氢的能力。 〜（2+），可能与L-半胱氨酸有关。当通过沸腾预处理玉米淀粉时，作为三次重复实验的平均值，累积H_2产量从838增加到1186 mL。预处理玉米淀粉的H_2生成速率比未处理玉米淀粉的H_2生成速率高得多。预处理的玉米淀粉的H_2产量达到1.19 mol H_2 / mol葡萄糖，比未处理的玉米淀粉（0.85 mol H_2 / mol葡萄糖）高40％。通过添加微量元素（Fe〜（2+）和Mg〜（2+））和L-半胱氨酸，除添加Mg〜（2+）以外，H_2的产量均高于对照。单独添加Fe〜（2+）和L-半胱氨酸可显着提高H_2的产量（分别增加105％和60％）。仅向系统中添加Fe〜（2+）效果最高，最大累积H_2产量为1928 mL，H_2产量为1.94 mol H_2 / mol葡萄糖。

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  • 来源
    《Fuel》 |2013年第10期|38-44|共7页
  • 作者

    M.D. Bao; H.J. Su; T.W. Tan;

  • 作者单位

    Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, PR China;

    Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, PR China;

    Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mixed culture; Hydrogen; Trace elements; L-cysteine; Pre-treatment;

    机译：混养;氢;微量元素;L-半胱氨酸;预处理;

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