JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Online ISSN : 1881-1299
Print ISSN : 0021-9592
Applications of Bubble Columns in Biotechnology
The Kinetics of Growth and the CO2 Concentrating Mechanism of the Filamentous Cyanobacterium Anabaena cylindrica in a Bubble Column
Anondho WijanarkoKazuhiro AsamiKazuhisa Ohtaguchi
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2004 Volume 37 Issue 8 Pages 1019-1025

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Abstract
The growth and CO2 concentrating mechanism of a filamentous cyanobacterium Anabaena cylindrica IAM-M1 in a bubble column have been studied by following the time courses of biomass concentration, pH, CO2 accumulation rate, and transmittance of light. The biomass production increased with the increasing superficial gas velocity from 9.0 m·h–1 to 12 m·h–1 or with increasing mole fraction of CO2 at the inlet from 0.03 to 0.06, while it decreased with the increasing superficial gas velocity from 12 m·h–1 to 18.0 m·h–1 or with the increasing fraction of CO2 from 0.06 to 0.12. As biomass concentration increased the photosynthetic photon flux density of the transmitted light decreased. The CO2 accumulation rate, which almost equaled in magnitude the CO2 mass transfer rate (CTR), went up steeply in the early phase of cell growth. The photosynthetic CO2 uptake rate (CUR) reached the maximum at the late logarithmic growth phase. The maximum value of the ratio CTR/CUR was 804.
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© 2004 The Society of Chemical Engineers, Japan
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