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首页> 外文期刊>Bioprocess and Biosystems Engineering >Co-fermentation of carbon sources by Enterobacter aerogenes ATCC 29007 to enhance the production of bioethanol
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Co-fermentation of carbon sources by Enterobacter aerogenes ATCC 29007 to enhance the production of bioethanol

机译：产气肠杆菌ATCC 29007共同发酵碳源以增强生物乙醇的生产

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摘要

We investigated the enhancement of bioethanol production in Enterobacter aerogenes ATCC 29007 by co-fermentation of carbon sources such as glycerol, glucose, galactose, sucrose, fructose, xylose, starch, mannitol and citric acid. Biofuel production increases with increasing growth rate of microorganisms; that is why we investigated the optimal growth rate of E. aerogenes ATCC 29007, using mixtures of different carbon sources with glycerol. E. aerogenes ATCC 29007 was incubated in media containing each carbon source and glycerol; growth rate and bioethanol production improved in all cases compared to those in medium containing glycerol alone. The growth rate and bioethanol production were highest with mannitol. Fermentation was carried out at 37 ℃ for 18 h, pH 7, using 50 mL defined production medium in 100 mL serum bottles at 200 rpm. Bioethanol production under optimized conditions in medium containing 16 g/L mannitol and 20 g/L glycerol increased sixfold (32.10 g/L) than that containing glycerol alone (5.23 g/L) as the carbon source in anaerobic conditions. Similarly, bioethanol production using free cells in continuous co-fermentation also improved (27.28 g/L) when 90.37 % of 16 g/L mannitol and 67.15 % of 20 g/L glycerol were used. Although naturally existing or engineered microorganisms can ferment mixed sugars sequentially, the preferential utilization of glucose to non-glucose sugars often results in lower overall yield and productivity of ethanol. Here, we present new findings in E. aerogenes ATCC 29007 that can be used to improve bioethanol production by simultaneous co-fermentation of glycerol and mannitol.
机译：我们研究了共发酵碳源（如甘油，葡萄糖，半乳糖，蔗糖，果糖，木糖，淀粉，甘露醇和柠檬酸）对产气肠杆菌ATCC 29007中生物乙醇产量的提高。生物燃料产量随着微生物生长速率的增加而增加；这就是为什么我们使用不同碳源与甘油的混合物研究了产气链球菌ATCC 29007的最佳生长速率的原因。在含有每种碳源和甘油的培养基中孵育产气链球菌ATCC 29007；与仅含甘油的培养基相比，所有情况下的生长速率和生物乙醇产量均得到改善。甘露醇的生长速率和生物乙醇产量最高。在100毫升血清瓶中以200 rpm的转速在37℃发酵18小时，pH为7。在厌氧条件下，在含有16 g / L甘露醇和20 g / L甘油的培养基中优化条件下的生物乙醇产量比仅含有甘油（5.23 g / L）的培养基增加了六倍（32.10 g / L）。类似地，当使用90.37％的16 g / L甘露醇和67.15％的20 g / L甘油时，在连续共发酵中使用游离细胞的生物乙醇生产也得到了改善（27.28 g / L）。尽管天然存在的或工程改造的微生物可以顺序发酵混合糖，但是葡萄糖优先于非葡萄糖使用通常会导致乙醇的总产率和生产率降低。在此，我们介绍了产气大肠杆菌E. ATCC 29007的新发现，该发现可用于通过甘油和甘露醇的同时共同发酵来提高生物乙醇的生产。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2014年第6期|1073-1084|共12页
  • 作者

    Laxmi Prasad Thapa; Sang Jun Lee; Xiao Guang Yang; Hah Young Yoo; Sung Bong Kim; Chulhwan Park; Seung Wook Kim;

  • 作者单位

    Department of Chemical and Biological Engineering, Korea University, 1, Anam-Dong, Seongbuk-Gu, Seoul 136-701, Republic of Korea;

    Department of Chemical and Biological Engineering, Korea University, 1, Anam-Dong, Seongbuk-Gu, Seoul 136-701, Republic of Korea;

    Department of Chemical and Biological Engineering, Korea University, 1, Anam-Dong, Seongbuk-Gu, Seoul 136-701, Republic of Korea;

    Department of Chemical and Biological Engineering, Korea University, 1, Anam-Dong, Seongbuk-Gu, Seoul 136-701, Republic of Korea;

    Department of Chemical and Biological Engineering, Korea University, 1, Anam-Dong, Seongbuk-Gu, Seoul 136-701, Republic of Korea;

    Department of Chemical Engineering, Kwangwoon University, 447-1, Wolgye-Dong, Nowon-Gu, Seoul 139-701, Republic of Korea;

    Department of Chemical and Biological Engineering, Korea University, 1, Anam-Dong, Seongbuk-Gu, Seoul 136-701, Republic of Korea;

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

    Enterobacter aerogenes; Co-fermentation; Mannitol; Glycerol; Bioethanol production; CSTR;

    机译：产气肠杆菌;共同发酵;甘露醇甘油;生物乙醇生产;CSTR;

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