Production and Utilisation of Yeast Biomass for Wine Fermentation

In this chapter, the current practices in the production of various wine yeasts in the format of active dry yeast (ADY) have been elucidated, with focuses on multi-stage yeast fed-batch fermentation and ADY production using fluid bed drying technology. Even though the equipment and processes currently used to produce wine active dry yeast (WADY) have not be changed significantly in the last 25 years or so, progresses have been made on the process control front during the yeast fed-batch fermentation process. In addition, our understanding of yeast genetics and physiology has tremendously improved. These advances are certainly beneficial for enhancing the production of WADY in terms of both production efficiency and yeast quality.