Yeast propagation
Propagation of bottom and top yeasts in a one-tank process has been investigated in an extensive test series, with special emphasis on flocculation behaviour of flocculent yeasts in subsequent fermentations. Apart from checking the influence of propagation temperature and aeration, pure culture wort concentration and propagation time on yeast reproduction and yeast vitality, tests were made aimed at finding ways of avoiding the slightly more powdery character of flocculent yeasts during the first commercial propagation cycle, a phenomenon frequently observed.
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