4.2
Combination of Yeast Cells with Surfactants
Husband et al. [121] combined rehydrated Saccharomyces cerevisiae and a
surfactant and used them as a model for flotation in a 100-cm high, 45-mm
diameter laboratory column, which was provided with a stainless steel air
sparger. The feed entered at half height into the column, the foam left the
column at the top and the residual liquid at the bottom. No information was
given on the control of the interface between the bubbling liquid layer and the
foam layer. In some runs washing water was added to the foam layer at the top
Recovery of Proteins and Microorganisms from Cultivation Media by Foam Flotation
225
Fig. 7. Pilot plant equipment for continuous cell flotation with integrated bioreactor/cell
flotator. S flow meter; V medium storage; B bioreactor; F feed; FD foam destroyer; P pump;
G gas distributor; SM stirrer motor; and R residue [117]