Practice question

Question

Ethanol is produced in a 10,000 L stirred bioreactor using an impeller of diameter 1 m. The density and viscosity of fermentation broth are 1000 kg m-3 and 1 cp, respectively. The data relating the Power number and Impeller Reynolds number is given below: Reynolds number 1-5 5-500 > 10 ⁵ Power number 70 10 5 Using the above data, the power required for the stirrer to operate at 300 rpm is ________ kW (Answer in integer)