INVESTIGATING THE GROWTH AND FERMENTATION OF MIXED YEAST SACCHAROMYCES CEREVISIAE VAR. BOULARDII CNCM I-745 AND SACCHAROMYCES CEREVISIAE 7012 ON SOYBEAN RESIDUE HYDROLYSATE

Abstract

This study investigated the growth and fermentation ability when combining two strains of yeast Saccharomyces cerevisiae var. boulardii CNCM I-745 and Saccharomyces cerevisiae 7012 compared with the independent growth and fermentation of each strain. The research results showed: two yeast strains can simultaneously ferment on the soybean residue hydrolysate, the fermentation speed when combining strains was faster than single-strain fermentation; fermentation also increased antioxidant activity compared with pre-fermentation. The combination of strains showed that S. boulardii CNCM I-745 not only grew well on residue hydrolysate with S. cerevisiae 7012, but the probiotic density remained high > 7 log CFU/ml during 6 weeks of storage at 4oC. The combined fermentation also changed the residue structure more than in the case of single-strain fermentation.