Multiphase Bioreactor Design

results in a higher transfer rate. The transfer rate is also influenced by the distribution
coefficient, a higher distribution coefficient gives also a higher transfer rate.

Figure 12.13a Distribution coefficient

as a function of the maximum substrate

conversion rate for which a three-phase

fluidised bed performs equally well as

a liquid fluidised bed. Uc=0.75 cm/s,

Ud=0.40 cm/s Ud=0.14 cm/s. Open

symbols =1 mol/m^3 , closed

symbols =100 mol/m

3

X vmax (mol/m^3 s) tbatch (99%) (min) =1 mol/m^3 =100 mol/m^3

0.001 166.3 15545

0.01 22.13 1560

0.05 15.04 319.4

0.1 15.47 167.2

1 14.95 21.4

Multiphase bioreactor design 374