Kvasny Prum. 1983; 29(8): 172-175 | DOI: 10.18832/kp1983032

Significance of K+ ions in fooder yeast production from ethanol.Peer-reviewed article

M. RUT, J. ADÁMEK, J. KARNET, F. ŠTROS

Dynamic of potassium uptake during a culture of fooder yeast Torulopsis ethanolitolerans on synthetic ethanol were studied. Using a periodical dosage of potassium large variances in its concentration were observed. At the start of the dosage interval the yeasts accumulate am increased quantity of potassium (25-45 mg K⁺ per 1 g of cell dry weight). At the end of the interval the potassium concentration decreased under the optimal limit and potassium uptake is below 20 mg . g^-1. The optimum potassium concentration in the medium of about 100 mg . l^-1 can be maintained by a continuous potassium dosage. For a continuous measurements of the potassium concentration, the ion selective potassium electrode can be used. This procedure permits to increase the biomass yield coefficient from 0.695 to0.780 in a synthetic medium.(In Czech, English summary only)

Keywords: potassium, fooder yeast, ethanol

Published: August 1, 1983