Production of oils from acetic acid by the oleaginous yeast Cryptococcus curvatus.
The feasibility of the conversion of acetic acid, a metabolite commonly obtained during anaerobic fermentation processes, into oils using the yeast Cryptococcus curvatus was reported. This microorganism exhibited very slow growth rates on acetate as carbon source, which led to design a two-stage cultivation process. The first consisted of cell growth on glucose as carbon source until its complete exhaustion. The second step involved the use of acetate as carbon source under nitrogen limitation in order to induce lipid accumulation. A typical experiment performed in a bioreactor involved a preliminary yeast growth with a glucose initial concentration of 15 g/L glucose. Further additions of acetate and nitrogen source allowed a final lipid accumulation up to 50% (w/w). These promising results demonstrated the suitability of the technique proposed.
Laboratoire de Génie Chimique et Biochimique, Polytech Clermont-Ferrand, Clermont Université, Université Blaise Pascal, 24 Av. des Landais, BP 20206, 63174 Aubière, France.
G
G
Christophe
J Lara
JL
Deo
V
V
Kumar
R
R
Nouaille
P
P
Fontanille
C
C
Larroche
D019342:Acetic Acid / Q000378:metabolism*; D061249:Batch Cell Culture Techniques; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D002244:Carbon / Q000378:metabolism; D056285:Cryptococcus gattii / Q000254:growth & development / Q000378:metabolism*; D005285:Fermentation; D005947:Glucose / Q000378:metabolism; D009821:Oils / Q000737:chemistry / Q000378:metabolism*
D009821:Oils; D002244:Carbon; D005947:Glucose; D019342:Acetic Acid