Fermentations were carried out in 200 L tanks at temperatures between
18 and 22 °C. Fermentation kinetics were evaluated by monitoring
the density. Two different fermentations were carried out: a pure
culture of S. cerevisiae and a sequential mixed culture where
T. delbrueckii was inoculated 24 h before S. cerevisiae yeast. Single and
mixed cultures were inoculated with 1 × 107 viable cells/mL for
T. delbrueckii and 2 × 106 viable cells/mL for S. cerevisiae. All experiments
were performed in duplicate.
Fermentations were carried out at 24 °C with agitation in 1.2 L fermentors
locked to maintain anaerobiosis throughout alcoholic fermentation
(CO2was released through a sterile air outlet condenser). Four different
fermentations were conducted: two with pure cultures and two with
mixed cultures. Two types of mixed cultures were carried out:
simultaneous mixed modality where T. delbrueckii and S. cerevisiae
were inoculated at the same time and sequential mixed modality
where T. delbrueckiiwas inoculated 24 h before S. cerevisiae yeast. Single
and mixed cultures were inoculated with 1 × 107 viable cells/mL for
T. delbrueckii and 2 × 106 viable cells/mL for S. cerevisiae. All experiments
were performed in triplicate.