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This document discusses mixing in bioreactors using multiple impellers. It notes that multiple Rushton turbines can be used without gassing and their power estimated using an equation. Other impeller combinations without gassing involve an upper impeller generating downward flow into a lower radial impeller. Retrofitting aims to match the original power and torque. Effective mixing requires turbulent flow, while non-Newtonian fluids are shear thinning. Turbulent shear stress varies over time and position, a
- Author
- John Eivhon Festijo
- Language
- EN