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Side-by-Side Comparison of Clean and Biomass-Derived, Impurity-Containing Syngas as Substrate for Acetogenic Fermentation with Clostridium ljungdahlii

Infantes, Alba 1; Kugel, Michaela 1; Raffelt, Klaus 2; Neumann, Anke 1
1 Institut für Bio- und Lebensmitteltechnik (BLT), Karlsruher Institut für Technologie (KIT)
2 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)


Syngas, the product of biomass gasification, can play an important role in moving towards the production of renewable chemical commodities, by using acetogenic bacteria to ferment those gaseous mixtures. Due to the complex and changing nature of biomass, the composition and the impurities present in the final biomass-derived syngas will vary. Because of this, it is important to assess the impact of these factors on the fermentation outcome, in terms of yields, productivity, and product formation and ratio. In this study, Clostridium ljungdahlii was used in a fed-batch fermentation system to analyze the effect of three different biomass-derived syngases, and to compare them to equivalent, clean syngas mixtures. Additionally, four other clean syngas mixtures were used, and the effects on product ratio, productivity, yield, and growth were documented. All biomass-derived syngases were suitable to be used as substrates, without experiencing any complete inhibitory effects. From the obtained results, it is clear that the type of syngas, biomass-derived or clean, had the greatest impact on product formation ratios, with all biomass-derived syngases producing more ethanol, albeit with lesser total productivity.

Verlagsausgabe §
DOI: 10.5445/IR/1000125704
Veröffentlicht am 05.11.2020
DOI: 10.3390/fermentation6030084
Zitationen: 18
Zitationen: 21
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Bio- und Lebensmitteltechnik (BLT)
Institut für Katalyseforschung und -technologie (IKFT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2311-5637
KITopen-ID: 1000125704
HGF-Programm 35.13.04 (POF III, LK 01) Bioliq
Erschienen in Fermentation
Verlag MDPI
Band 6
Heft 3
Seiten Article: 84
Bemerkung zur Veröffentlichung This article belongs to the Special Issue Microbial Production of Added-value Products from Renewable Resources 2.0
Vorab online veröffentlicht am 19.08.2020
Schlagwörter syngas fermentation; acetogen; Clostridium ljungdahlii; biomass-derived syngas; syngas impurities; acetate; ethanol
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