Question

What is the proper concentration unit of kLa?

(a) h^-1

(b) ml/h

(c) mmol/h

(d) ml/sec

I had been asked this question by my school teacher while I was bunking the class.

My doubt is from Measurement of KLa in division Mass Transfer of Bioprocess Engineering

Answer 1

Right option is (a) h^-1

For explanation I would say: In this relation, the volumetric oxygen transfer coefficient, kLa, has the units of mmol, of O2/ml. h. unit concentration gradient. Using the proper concentration units, kLa has the unit of reciprocal of time (i.e., time^-1).