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Which of the following is the efficient value for oxygen concentration?

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Which of the following is the efficient value for oxygen concentration?

(a) Equal to Ccrit

(b) Below Ccrit

(c) Above Ccrit

(d) Ccrit

The question was asked in unit test.

Question is taken from Measurement of KLa in division Mass Transfer of Bioprocess Engineering

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Best answer
Correct choice is (c) Above Ccrit

The explanation: It is important that the oxygen concentration remains above Ccrit so that the rate of oxygen uptake by the cells is independent of oxygen level.

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