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What is the benefit of stirring or agitation in a fermenter?

Answer and explanation

Correct answer: To improve mixing and oxygen distribution

The governing bioprocess concept is mass transfer and uniform mixing inside the fermenter. Agitation circulates the culture medium so nutrients, cells, heat and dissolved gases are distributed more evenly. In an aerobic process it also helps disperse incoming air and increases contact between bubbles and the liquid, supporting oxygen transfer to microorganisms. Thus option A is correct. Agitation does not seal the vessel, and it is not intended to kill the production organism; excessive agitation may even damage sensitive cells. Making the medium invisible has no biological or engineering meaning. The exact speed is selected to balance oxygen transfer, mixing and shear stress.

Related tags

BiotechnologyBioprocess EngineeringAgitationOxygen TransferPrinciples Of BiotechnologyClass 11 Mcq

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