Figure 1: An appropriate fermentation scale-down model is critical to allow comparison of lab scale studies to the manufacturing case. Modeling of fermentors increases confidence that a fermentation process is scalable within the confines of available equipment and that the data acquired are an accurate representation of production fermentations. Modeling fermentation oxygen transfer between development scales of 1–100 L and production scales of 1,000–10,000 L+ has been extensively studied, and there are numerous approaches including P/V, KLa, and OUR models.…