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首页> 外文期刊>Energy & environmental science >Biological formation of caproate and caprylate from acetate: fuel and chemical production from low grade biomass
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Biological formation of caproate and caprylate from acetate: fuel and chemical production from low grade biomass

机译：乙酸盐生成己酸和辛酸的生物：低品位生物质的燃料和化学生产

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This research introduces an alternative mixed culture fermentation technology for anaerobic digestion to recover valuable products from low grade biomass. In this mixed culture fermentation, organic waste streams are converted to caproate and caprylate as precursors for biodiesel or chemicals. It was found that acetate, as the main intermediate of anaerobic digestion, can be elongated to medium chain fatty acids with six and eight carbon atoms. Mixed microbial communities were able to produce 8.17 g1~(-1) caproate and 0.32 g1~(-1) caprylate under methanogenesis-suppressed conditions in a stable batch reactor run. The highest production rate was 25.6 mM C caproate per day with a product yield of 0.6 mol C per mol C. This elongation process occurred with both ethanol and hydrogen as electron donors, demonstrating the flexibility of the process. Microbial characterization revealed that the microbial populations were stable and dominated by relatives of Clostridium kluyveri.
机译：这项研究介绍了一种用于厌氧消化的替代混合培养发酵技术，可从低品位生物质中回收有价值的产品。在这种混合培养发酵中，有机废物流被转化为己酸和辛酸，作为生物柴油或化学品的前体。发现乙酸盐作为厌氧消化的主要中间体，可以延长至具有六个和八个碳原子的中链脂肪酸。在稳定的间歇式反应器运行中，在产甲烷抑制的条件下，混合微生物群落能够产生8.17 g1〜（-1）己酸和0.32 g1〜（-1）辛酸。最高生产率为每天25.6 mM己酸C，每摩尔C的产品收率为0.6 molC。这种伸长过程是在乙醇和氢作为电子给体的情况下发生的，这表明了该过程的灵活性。微生物鉴定表明，微生物种群稳定并且由克鲁氏梭菌的亲属主导。

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  • 来源
    《Energy & environmental science》 |2011年第1期|p.216-224|共9页
  • 作者

    Kirsten J. J. Steinbusch; Hubertus V. M. Hamelers; Caroline M. Plugge; Cees J. N. Buisman;

  • 作者单位

    Sub-department of Environmental technology, Wageningen University, Bomenweg 2, 6703 HD Wageningen, The Netherlands;

    Sub-department of Environmental technology, Wageningen University, Bomenweg 2, 6703 HD Wageningen, The Netherlands;

    Laboratory of Microbiology, Wageningen University, Dreijenplein 10, 6703 HB Wageningen, The Netherlands;

    Sub-department of Environmental technology, Wageningen University, Bomenweg 2, 6703 HD Wageningen, The Netherlands;

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