Practice question

Question

The dimensions and operating condition of a lab-scale fe1mentor are as follows: Volume= 1 L Diameter = 20 em Agitator speed = 600 rpm Ratio of impeller diameter to fe1mentor diameter= 0.3 This fe1mentor needs to be scaled up to 8,000 L for a large scale industrial application. If the scale-up is based on constant impeller tip speed, the speed of the agitator in the larger reactor is 1pm. Assume that the scale-up factor is the cube root of the ratio of fermentor volumes.