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Speed is the factor affecting the value of kLa.(a) True(b) FalseThis 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»

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.



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