Induction of flocculation of brewer's yeast strains of Saccharomyces cerevisiae by changing the calcium concentration and pH of culture medium

Authors: Soares E.V.; Seynaeve J.

Source: Biotechnology Letters, Volume 22, Number 23, December 2000 , pp. 1827-1832(6)

Publisher: Springer

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Abstract:

Strains of Saccharomyces cerevisiae (NCYC 1190, 1214 and 1364) behaved as nonflocculent in defined culture medium, as well as the strain NCYC 1214 in rich medium. Flocculation was induced by Ca^2+ addition and/or by correcting the pH to a suitable value. Since the free Ca^2+ concentration is pH-dependent, these two factors (total Ca^2+ concentration and pH) cannot be dissociated and are the critical parameters governing flocculation, in culture medium, of the brewing strains studied.

Keywords: calcium; flocculation; pH; Saccharomyces cerevisiae; yeast

Language: English

Document Type: Regular paper

Affiliations: 1: CIEA-Departamento de Engenharia Química, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr António Bernardino de Almeida, 431, P-4200-072 Porto, Portugal

Publication date: 2000-12-01