Butanol fermentation of the brown seaweed Laminaria digitata by Clostridium beijerinckii DSM-6422

Xiaoru Hou, Nikolaj From, Irini Angelidaki, Wouter J J Huijgen, Anne Belinda Bjerre

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    Abstract

    Seaweed represents an abundant, renewable, and fast-growing biomass resource for 3rd generation biofuel production. This study reports an efficient butanol fermentation process carried out by Clostridium beijerinckii DSM-6422 using enzymatic hydrolysate of the sugar-rich brown seaweed Laminaria digitata harvested from the coast of the Danish North Sea as substrate. The highest butanol yield (0.42g/g-consumed-substrates) compared to literature was achieved, with a significantly higher butanol:acetone-butanol-ethanol (ABE) molar ratio (0.85) than typical (0.6). This demonstrates the possibility of using the seaweed L. digitata as a potential biomass for butanol production. For the first time, consumption of alginate components was observed by C. beijerinckii DSM-6422. The efficient utilization of sugars and lactic acid further highlighted the potential of using this strain for future development of large-scale cost-effective butanol production based on (ensiled) seaweed.
    Original languageEnglish
    JournalBioresource Technology
    Volume238
    Pages (from-to)16-21
    Number of pages6
    ISSN0960-8524
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Butanol production
    • Clostridium beijerinckii
    • Enzymatic hydrolysate
    • Laminaria digitata
    • Wide-spectrum-substrate utilization

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