In a well aerated and agitated microbial culture, the 'supply' of oxygen is equal to 'demand' (uptake) of the growing culture. The K_La for such a system will be (K_La = volumetric mass transfer coefficient, C* = dissolved oxygen concentration in liquid in equilibrium with gaseous oxygen, C = instantaneous value of dissolved oxygen concentration, 'r' = specific oxygen uptake rate per unit weight of cells, X = dry weight of the cells per unit volume)

A) $$\frac{{\left( {rX} \right)}}{{\left( {C* - C} \right)}}$$ B) $$\frac{{\left( r \right)}}{{X\left( {C* - C} \right)}}$$ C) $$\frac{{\left( {C* - C} \right)}}{{\left( {rX} \right)}}$$ D) $$\frac{{\left( X \right)}}{{r\left( {C* - C} \right)}}$$

Answer & Solution

Correct Answer: Option A

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