A continuous fermentation of Kluyveromyces fragilis for the production of a highly nutritious protein diet
1998
Kim, J.K. | Tak, K.T. | Moon, J.H.
To develop a novel yeast diet, production of Kluyveromyces fragilis has been carried out in aerobic continuous culture. With a 2.5% fructose medium, the maximum biomass productivity of the chemostat was 4.81 g l(-1) per h. At low dilution rates (D < 0.17 h(-1)) aerobic ethanol synthesis was almost not found and the maximum biomass yield was found to be 0.42 g dry biomass g(-1) fructose with 5.5 x 10(9) viable yeasts per ml. The protein content of the yeast biomass was 50-55% at all dilution rates studied. Fermentation parameters of Ks, Dc, m, and Yx/s(G) were estimated by the Monod equation and found to be 0.1 g l(-1), 0.79 h(-1), 0.2 g fructose consumed per g dry biomass h(-1) and 0.24 g dry biomass per g fructose, respectively. From the data, the specific productivity of biomass was estimated to be 0.74 h(-1).
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