Question

Speed is the factor affecting the value of kLa.

(a) True

(b) False

This question was addressed to me by my college director while I was bunking the class.

I want to ask this question from Measurement of KLa topic in section Mass Transfer of Bioprocess Engineering

Answer 1

Correct choice is (a) True

The best explanation: Because kLa measurements involve monitoring levels of DO following a system perturbation, the results can be influenced by the response time (or “speed”) of a sensor making those determinations. Sensors with response times (τr) on the order of the first-order time constant of the mass transfer (1 / kLa) require special treatment of their data to correct for the time lag in readings introduced by the oxygen sensor.