Impeller Selection for Lignocellulosic Hydrolysis Reactors

How should a company select impellers for lignocellulosic hydrolysis reactors? Lignocellulosic slurries at high solids concentrations (10-30%) can be quite viscous. The author has seen somewhere the viscosity at a shear rate of 1/s is higher than 400,000 cP. Conventional agitator impeller selection guidelines would lead one to use helical ribbon impellers (figure 1; aka…

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Aerobic Fermentation Processing

Bio-processing may involve aerobic fermentation, whereas ethanol and chemicals from starches and lignocellulosic materials are generally anaerobic processes. Aerobic fermentation is a metabolic process by which cells metabolize sugars via fermentation in the presence of oxygen and occurs through the repression of normal respiratory metabolism. Aerobic fermentation occurs in the presence of oxygen. It usually…

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