Alcoholic fermentation of glucose by Ca-alginate immobilised
Saccharomyces cerevisiaeAlcoholic fermentation is a process often affected by the presence of the product, which
causes a progressive decrease in the production rate until a threshold value is reached at
Table 11.2 Kinetic parameters of the enzymatic
hydrolysis of starch operating in packed-bed
bioreactor with and without pulsation
Packed-bed reactor Without pulsation With pulsation
S (gL−^1 ) Vmax KM Vmax KM
50 0.099 12.44 0.110 12.42
100 0.097 13.02 0.123 12.50
150 0.102 13.36 0.144 12.53
Figure 11.5 Effects of pulsation on
enzymatic hydrolysis of starch in
pulsed and non-pulsed packed-bed
bioreactors for different substrate
concentrations at a hydraulic retention
time of 1 h.
which it stops. Accordingly, for this process, a hydraulic behaviour such as plug flow is
desirable.
Pulsing bioreactors 339