Pseudomonas sp. has a mass doubling time of 2.4 h when grown on acetate. The saturation constant using this substrate is 1.3 g/L, and cell yield on acetate is 0.46 g cell/g acetate. If we operate a chemostat on a feed stream containing 38 g/L acetate, find the following (assume monod kinetics):

Find the following:

a. Maximum dilution rate

b. Cell concentration when the dilution rate is one-half of the maximum

c. Substrate concentration when the dilution rate is 0.8 Dmax

d. Cell productivity at 0.8 Dmax