ISSN:
1432-0614
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Summary The following turbulence properties of a bubble column bioreactor were measured using a constant temperature anemometer with wedge shaped probes: intensity, autocorrelation function, micro and macro scales, energy dissipation rate, power spectra and energy dissipation spectra. The influence of the medium, aerator type and gas flow rate on the turbulence properties were considered. The turbulence which prevails in bubble columns is swarm turbulence and cannot be described by grid turbulence when perforated plates are used. The gas flow rate and medium properties exert only slight influences on the shape of the power spectra and energy dissipation spectra. In systems with porous plates, the turbulence has a much finer structure and the maximum of the energy dissipation spectra is closer to the gas dispersion range than in systems with perforated plates. The efficiency of energy utilization for gas dispersion in the former is therefore higher.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01008335
