A laboratory fermentor is equipped with a baffled disc-blade turbine mixer with a diameter of 0.1m and width 0.02m. The vessel is of a cylindrical geometry with inside diameter of 0.3m, filled to a height of 0.3m. The turbine speed of rotation for adequate mixing is 600 rpm. If the process is to be scaled-up to a fermentor with a capacity of 1.0 m3 , observing geometrical similarities and maintaining the same mixing rate establish the following; i. The speed of revolution for the larger vessel ii. Will a 2.5 kW motor be sufficiently strong to run the larger vessel? Use the power curve and the relationships provided overleaf, with the symbols having their usual meanings
A laboratory fermentor is equipped with a baffled disc-blade turbine mixer with a diameter of 0.1m and width 0.02m. The vessel is of a cylindrical geometry with inside diameter of 0.3m, filled to a height of 0.3m. The turbine speed of rotation for adequate mixing is 600 rpm. If the process is to be scaled-up to a fermentor with a capacity of 1.0 m3 , observing geometrical similarities and maintaining the same mixing rate establish the following; i. The speed of revolution for the larger vessel ii. Will a 2.5 kW motor be sufficiently strong to run the larger vessel? Use the power curve and the relationships provided overleaf, with the symbols having their usual meanings
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A laboratory fermentor is equipped with a baffled disc-blade turbine mixer with a diameter of 0.1m and width 0.02m. The vessel is of a cylindrical geometry with inside diameter of 0.3m, filled to a height of 0.3m. The turbine speed of rotation for adequate mixing is 600 rpm. If the process is to be scaled-up to a fermentor with a capacity of 1.0 m3 , observing geometrical similarities and maintaining the same mixing rate establish the following;
i. The speed of revolution for the larger vessel
ii. Will a 2.5 kW motor be sufficiently strong to run the larger vessel?
Use the power curve and the relationships provided overleaf, with the symbols having their usual meanings
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