Microporous hollow fibres for carbon dioxide absorption: Mass transfer model fitting and the supplying of carbon dioxide to microalgal cultures
✍ Scribed by Bruno S. Ferreira; Helena L. Fernandes; Alberto Reis; Marília Mateus
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1998
- Tongue
- English
- Weight
- 338 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0268-2575
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✦ Synopsis
A method of supplying to photosynthetic algal cultures was devel-CO 2 oped based on mass transfer measurements of through microporous hydro-CO 2 phobic hollow Ðbres for various gas and liquid Ñow rates. A mathematical model was derived to describe the mass transfer. The designed hollow Ðbre module led to overall mass transfer coefficient values ranging from 1É26 ] 10~3 to 2É64 ] 10~3 cm s~1. Higher efficiencies of the transmission were obtained CO 2 at high liquid Ñow rates and low gas Ñow rates. The use of microporous hydrophobic hollow Ðbres enabled an enhancement of the carbon dioxide transfer per area of membrane surface by a factor of 10, in comparison to operation with silicone tubing. The hollow Ðbre module was operated in an external bypass to a 1 dm3 microalgae culture vessel. In this system the algal growth pattern was similar to that obtained with a control culture where was bubbled. CO 2 However, the dissolved oxygen concentration was always lower in the vessel in which was supplied by the module. 1998 SCI. CO 2 (