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Effect of acetate on fermentation production of butyrate
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0001-7500-2367
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2012 (English)In: Cellulose Chemistry and Technology, ISSN 0576-9787, Vol. 46, no 5-6, 341-347 p.Article in journal (Refereed) Published
Abstract [en]

A carbon source for the fermentation production of butyrate is xylose extracted from ligno-cellulosic material by hot water extraction. Although this auto-hydrolysis of hemicellulose can provide a low-cost source of xylose, the process generates a high level of acetic acid that might inhibit subsequent fermentations. This study focuses on the effects of acetate on the production of butyrate from xylose by batch fermentations with a selected strain Clostridium tyrobutyricum.At initial acetate concentrations of 17.6 g L-1 and 26.3 g L-1 in the media, C. tyrobutyricum cultures exhibited a lag phase (45 and 118 hours, respectively) in terms of sugar consumption, butyrate production and cell biomass growth, lowering the overall production rate. Butyrate fermentations performed with high concentrations of acetate in the media demonstrated a re-uptake of acetate into the butyrate production pathway and after the lag phase, all cultures adapted to the inhibitory acetate, which increased the final butyrate yields by 12.6% (32.6 g L-1 compared to 28.5 g L-1).

Place, publisher, year, edition, pages
2012. Vol. 46, no 5-6, 341-347 p.
Keyword [en]
Chemistry - Biochemistry, Technology - Bioengineering
Keyword [sv]
Kemi - Biokemi, Teknikvetenskap - Bioteknik
National Category
Bioprocess Technology
Research subject
Biochemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-9447Local ID: 811a0fe8-6129-4eb1-a861-fd61d126c505OAI: oai:DiVA.org:ltu-9447DiVA: diva2:982385
Note
Validerad; 2012; 20120813 (ulrok)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Jaros, AdamRova, UlrikaBerglund, Kris
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