Kvasny Prum. 1984; 30(11): 242-245 | DOI: 10.18832/kp1984046

Reproduction of contaminant microorganisms during fermentation of beer.Peer-reviewed article

V. KURZOVÁ

The author studied a possibility of the reproduction and growth of contaminant microorganisms in presence of the pure culture of brewing yeasts in model fermentation tests. The results showed that despite the individual groups of contaminants had different behaviour during the fermentation the number of contaminants always increased. The number of wild yeasts increases about one order during the principle fermentation and during the post-fermentation this number yet increases twice. The number of pediococci remained the same during the principle fermentation however; during the post-fermentation its number increases about one order. Significant reproduction of coliform bacteria was observed during the principle fermentation however; the majority of them remain in yeast sediment. During the post-fermentation the number of coliform bacteria in beer remains unchanged.
(In Czech, English summary only)

Keywords: reproduction, microorganism, fermentation, wild yeasts

Published: November 1, 1984