Continuous xylose fermentation by Clostridium acetobutylicum – Kinetics and energetics issues under acidogenesis conditions

A. Procentese, F. Raganati, G. Olivieri, M.E. Russo, P. Salatino, A. Marzocchella

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)

Abstract

The paper reports the assessment of the growth kinetics of Clostridium acetobutylicum DSM 792 adopting xylose as carbon source. Xylose is the fundamental component of hemicellulose hydrolysis, a relevant fraction of lignocellulosic feedstocks for biofuel production. Tests were carried out in a CSTR operated under controlled pH. The effects of acids (acetic and butyric) and solvents (acetone, ethanol and butanol) on the fermentation were investigated. The conversion process was characterized under steady-state conditions in terms of concentration of xylose, cells, acids, and pH. The growth kinetics was expressed by means of a multiple product inhibition and it was able to predict microorganism growth rate under a broad interval of operating conditions, even those typical of solvents production. The mass fractional yield of biomass and products were expressed as a function of the specific growth rate taking into account the Pirt model.
Original languageEnglish
Pages (from-to)155-161
JournalBioresource Technology
Volume164
DOIs
Publication statusPublished - 2014

Keywords

  • acetone-butanol fermentation
  • continuous lactose fermentation
  • biobutanol
  • biomass
  • growth
  • inhibition
  • energy

Fingerprint Dive into the research topics of 'Continuous xylose fermentation by Clostridium acetobutylicum – Kinetics and energetics issues under acidogenesis conditions'. Together they form a unique fingerprint.

  • Cite this