Bubble column bioreactors |
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Authors: | R Buchholz K Schügerl |
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Institution: | (1) Institut für Technische Chemie der Universität Hannover, Callinstraße 3, D-3000 Hannover 1, Germany |
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Abstract: | Summary The photographic and electrical conductivity methods to measure the structure of two phase flow, especially bubble size, bubble frequency, local gas hold-up and, for the latter, the bubble velocity are described.Symbols
specific interfacial area
- a
gas/liquid interfacial area
- B
constant in Eq. (4)
- d
diameter of the bubbles
- d
mean diameter of the bubbles
- dS
Sauter diameter
- EG
relative gas hold up
- I
current
- kL
mass transfer coefficient across the gas/liquid interface
- kL
local kL
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LT–1
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LT–1
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1
longitudinal distance between the start and stop sensors
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1B
pierced length of the bubble
- t
time
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t1
length of the square-wave signal at the start sensor
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t2
length of the square-wave signal at the stop sensor
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t12
time delay between start and stop signals
- V
volume of the bubbling layer
- VL
volume of the bubble free layer
- VB
bubble volume
- vB
bubble velocity |
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Keywords: | |
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