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2013-06-17 - Colloque/Présentation - poster - Anglais - 1 page(s)

Massart Amaury , Mirisola Aldo , Lupant Delphine , Hantson Anne-Lise , Thomas Diane , "Experimental Characterisation and Numerical Simulation of the Hydrodynamic in an Airlift Photobioreactor for Microalgae Cultures" in The 3rd International Conference on Algal Biomass, Biofuels and Bioproducts, Toronto, Canada, 2013

  • Codes CREF : Biochimie (DI3112)
  • Unités de recherche UMONS : Chimie et Biochimie appliquées (F504)
  • Instituts UMONS : Institut des Biosciences (Biosciences), Institut de Recherche en Energétique (Energie)

Abstract(s) :

(Anglais) Introduction The development of photobioreactors optimized to increase the production of biomass from phototrophic microalgae cultures assumes a major concern for the economic viability of different processes (biofuel production, carbon dioxide mitigation, pigments…). The main aim of this study is to measure the liquid velocity, the residence time and to quantify the transfer coefficient (kLa) of carbon dioxide in the culture medium according to the injected gas flow in a flat panel airlift photobioreactor. Material & Methods The experimental results obtained by various tracer tests in order to calculate the velocity of the liquid phase, and hence the residence time will be compared with the results of a numerical simulation of the fluid flow within the photobioreactor performed on the software FLUENT. The PBR is composed of an assembly of the glass plates forming a rectangular working volume of 14 liters. The injection of compressed air is formed in the side channel in order to drive the liquid therein. The movement of the liquid phase is induced by the difference between the apparent densities of the gas-liquid dispersion located in the pipe and the liquid phase located in the central part. Results & Discussion Characterization of hydrodynamics and transfer within the photobioreactor is essential to optimize the cultivation of microalgae. The mixing time is quite high for low flow of compressed air injected into the side channel. Beyond 2 L/min, the mixing time is reduced and decreases more significantly. For the measurement of kLa, we note that the latter increases as the flow of compressed air. In addition, the magnitudes of the measured kLa correspond to those obtained in stirred reactors.