Effect of acetate on fermentation production of butyrate

Adam Jaros, Ulrika Rova, Kris A. Berglund

Research output: Contribution to journalArticle

  • 4 Citations

Abstract

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).

LanguageEnglish (US)
Pages341-347
Number of pages7
JournalCellulose Chemistry and Technology
Volume46
Issue number5-6
StatePublished - Jun 2012

Profile

Butyrates
Fermentation
Acetates
Xylose
Clostridium
Acetic acid
Sugars
Hydrolysis
Biomass
Acetic Acid
Carbon
Water
Costs

Keywords

  • Acetate inhibition
  • Butyrate
  • Clostridium tyrobutyricum
  • Hemicellulose utilization
  • Xylose fermentation

ASJC Scopus subject areas

  • Materials Chemistry
  • Organic Chemistry

Cite this

Effect of acetate on fermentation production of butyrate. / Jaros, Adam; Rova, Ulrika; Berglund, Kris A.

In: Cellulose Chemistry and Technology, Vol. 46, No. 5-6, 06.2012, p. 341-347.

Research output: Contribution to journalArticle

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