Saccharomyces cerevisiae: Implicações para a Eficiência Fermentativa e a Bioeconomia Sustentável

Ethanolic fermentation in Brazil represents a model of clean and sustainable technology, based on circular systems and the use of Saccharomyces cerevisiae, playing a strategic role in the low-carbon economy. Accordingly, this study evaluated the effect of temperature on the growth and cellular viability of the industrial strains Fleischmann®, Barra Grande and Catanduva-1, as well as the potential application of surplus yeast biomass within the bioeconomy and its contribution to the Sustainable Development Goals (SDGs). The yeasts were cultivated in Yeast Extract Peptone Dextrose medium (YPD 2%) and subsequently inoculated into sugarcane juice (22 °Brix; pH 5.0), followed by incubation at 30, 35 and 40 °C. Cell growth was qualitatively assessed on Potato Dextrose Agar (PDA), and viability was determined using the methylene blue staining method. The results revealed distinct adaptive responses among the strains, with Fleischmann® showing optimal performance at 30 °C, Barra Grande exhibiting greater thermal stability at 40 °C, and Catanduva-1 demonstrating high robustness across all tested conditions. These findings reinforce the role of yeasts as versatile biotechnological platforms and indicate that thermally adapted strains offer strategic advantages for sustainable industrial applications.