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Growth and butyric acid production by Clostridium populeti

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1007/BF00407790
AuteurRechercher : 1; Rechercher : 2
Affiliation
  1. Conseil national de recherches Canada
  2. Conseil national de recherches Canada. Institut des sciences biologiques du CNRC
FormatTexte, Article
Résumé
The growth of Clostridium populeti in 2% (w/v) glucose medium containing 0.2% (w/v) yeast extract was optimal with 10 mM NH4Cl as the nitrogen source. Although the maximum specific growth rate (µ=0.32 h-1) with 5 mM NH4Cl was similar, the biomass yield was about 30% lower than that at the optimum. Either sodium sulphide or cysteine-HCl at an optimum concentration of 0.33 mM and 5.0 mM respectively, could serve as the sole sulphur source for growth. The growth rate was unaffected by initial glucose concentrations of up to 10% (w/v), but in the presence of 15% glucose it declined by about 35%. The molar yield of butyric acid (mol/mol glucose) declined from 0.70 in 1% (w/v) initial glucose medium to 0.39 in 10% glucose medium. In 5.7% initial glucose medium, butyric acid levels of 6.3 g/l were obtained (0.56 mol butyrate/mol glucose) after 72 h of incubation in 2.5 l batch cultures. A decrease of about 50% in the maximum specific growth rate of C. populeti was observed in the presence of an initial concentration of either 1.2 g/l of butyric acid or 18.9 g/l of acetic acid.
Date de publication
Dans
  • Archives of Microbiology 150 (1988) : 267–271.
Langueanglais
Numéro du CNRCPATEL1988A
NRCC 29032
Numéro NPARC9358706
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Identificateur de l’enregistrementab524d9f-c841-44de-aa0a-0425c60ed2d4
Enregistrement créé2009-07-10
Enregistrement modifié2020-03-17
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