Performance of a Customized Yeast Strain Selected from an Industrial Process and Used as Inoculum: A Case of Success

Claudia Steckelberg, Maria G. S. Andrietta

yeast, bioethanol, fermentative capacity, alcoholic fermentation

This study monitored the population dynamics of yeast strains in industrial ethanol fermentation tanks throughout the 2019 crop season. The aim was to select a native strain with good fermentative performance for use as inoculum in the 2020 season. The custom strain RAA5 showed favorable characteristics for fermentation (ethanol yield > 0.465, conversion >90%, biomass yield > 0.045%) as well as the ability to persist throughout the entire process. Monitoring of fermentation in the 2020 season confirmed that the custom yeast strain is robust, being detected in virtuallyall collections and dominating the tank in some months. It was concluded that the custom yeast selection strategy enhances the stability of alcohol fermentation by ensuring the permanence of the yeast strain or its reintroduction by raw materials.

https://doi.org/10.31871/IJNTR.8.7.14