Characterization of the two-phase systems in airlift tower-loop bioreactors during the cultivation of E. coli.
During the cultivation of E. coli in an airlift tower-loop bioreactor, the following properties were measured: transverse profiles of Sauter bubble diameter, d(S); local relative gas holdup, E(G); bubble rise velocity, u(BS); local mean velocity, ū turbulence intensity, u'; macrotime scale, T(EL); dissipation time scale, tau(E); power spectrum, E(n); and energy dissipation spectrum D(n) at different distances from the aerator. The influence, distance from the aerator, absence and/or presnece of cells, and batch and/or continuous-culture operation on the behavior of the two-phase system are discussed on the basis of these properties.
Institut für Technische Chemie der Universität Hannover, Callinstrasse, 3, D-3000 Hannover 1, Federal Republic of Germany.
J
J
Lippert
I
I
Adler
H D
HD
Meyer
A
A
Lübbert
K
K
Schügerl