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Which type of fermenter is used mainly for mixing?(a) Air-Lift fermenter(b) Stirred Tank fermenter(c) Fluidised Bed bioreactor(d) Packed Bed bioreactorI got this question in an international level competition.This interesting question is from Mixing in chapter Fluid Flow and Mixing of Bioprocess Engineering

Answer»

Correct answer is (b) Stirred Tank fermenter

To explain I WOULD say: Mixing is usually carried out in a stirred tank; Stirred tanks are usually cylindrical in shape. If possible, the base of the tank is rounded at the edges rather than angled; this ELIMINATES sharp CORNERS and pockets into which fluid currents may not penetrate and DISCOURAGES formation of stagnant REGIONS.



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