2.3. Microorganisms
The yeast strain D-2 is Saccharomyces cerevisiae, obtained from a collection of pure cultures from IBPRS (Institute of Agricultural and Food Biotechnology) Distillery Technology and Renewable Energy Division in Bydgoszcz. D-2 strain is characterized by: alcohol resistance (above 95 g/L EtOH), osmophily (22-24°Blg), thermophily (38–40 °C) and acidophily (pH ok.3).