Abstract
The growth behavior of Zygosaccharomyces yeasts in commercial beverages was investigated. In beverages with high sugar contents, such as high-sugar tea, fruit juices, beverages containing lactic acids, and sports drinks, excellent cell growth and generation of large amounts of CO2 gas were observed. In contrast, cell growth was very slow and little gas generation was observed when Zygosaccharomyces yeasts were grown in beverages with low sugar contents, such as low-sugar tea and green tea. Cell growth in high-sugar tea was found to increase in parallel with increasing growth temperature. These results suggest that yeast growth and gas generation in beverages contained in previously opened PET bottles may result in explosions.
