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A new photobioreactor for continuous microalgal production in hatcheries based on external-loop airlift and swirling flow

Loubiere, Karine and Olivo, Erell and Bougaran, Gael and Pruvost, Jérémy and Robert, René and Legrand, Jack A new photobioreactor for continuous microalgal production in hatcheries based on external-loop airlift and swirling flow. (2009) Biotechnology and Bioengineering, vol. 1 (n° 1). pp. 132-146. ISSN 0006-3592

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Official URL: http://dx.doi.org/ 10.1002/bit.22035

Abstract

This study deals with the scale of a new photobioreactor for continuous microalgal production in hatcheries. The combination of the state-of-art with the constraints inherent to hatcheries has turned the design into a closed, artificially illuminated and external-loop airlift configuration based on a succession of elementary modules, each one being composed of two transparent vertical interconnected columns. The liquid circulation is ensured pneumatically (air injections) with respect to a swirling motion (tangential inlets). A single module of the whole photobioreactor was built-up to investigate how parameters, such as air sparger type, gas flow rate, tangential inlet, column radius and height can influence radiative transfer, hydrodynamics, mass transfer and biological performances. The volumetric productivities were predicted by modeling radiative transfer and growth of Isochrysis affinis galbana (clone Tahiti). The hydrodynamics of the liquid phase was modeled in terms of global flow behavior (circulation and mixing times, Péclet number) and of swirling motion decay along the column (Particle Image Velocimetry). The aeration performances were determined by overall volumetric mass transfer measurements. Continuous cultures of Isochrysis affinis galbana (clone Tahiti) were run in two geometrical configurations, generating either an axial or a swirling flow. Lastly, the definitive options of design are presented as well as a 120 Liter prototype, currently implemented in a French mollusk hatchery and commercialized.

Item Type:Article
Additional Information:The definitive version is available at www3.interscience.wiley.com
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Institut Français de Recherche pour l'Exploitation de la MER - IFREMER
Other partners > Université de Nantes (FRANCE)
Other partners > Ecole des Mines de Nantes (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Ecole Nationale d'Ingénieurs des Techniques des Industries Agricoles et Alimentaires - ENITIAA (FRANCE)
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Deposited By:Karine LOUBIERE

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