Question

Refer to Q1 and Q2, and determine the value of the maintenance coefficient (g substrate/g DCW^-h).

(a) 0.099 g substrate/g DCW^-h

(b) 0.089 g substrate/g DCW^-h

(c) 0.079 g substrate/g DCW^-h

(d) 0.069 g substrate/g DCW^-h

I have been asked this question in final exam.

Query is from Effect of Maintenance on Yields topic in section Homogenous Reactions of Bioprocess Engineering

Answer 1

Correct choice is (a) 0.099 g substrate/g DCW^-h

To explain: 10% of the substrate goes to maintaining the cells.

m = (10 g substrate/l.0.10)/(1.81 g DCW/L.5.63 hr)

= 0.099 g substrate/g DCW^-h.