Simple method for measuring the spectral absorption cross-section of microalgae

Autor: Jeremy Pruvost, Benoit Rousseau, Antoine Souliès, Laurent Pilon, Jack Legrand, Razmig Kandilian
Přispěvatelé: Department of Mechanical and Aerospace Engineering, University of California [Los Angeles] (UCLA), University of California-University of California, Bioprocédés Appliqués aux Microalgues (GEPEA-BAM), Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Institut Universitaire de Technologie - Nantes (IUT Nantes), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut Universitaire de Technologie Saint-Nazaire (IUT Saint-Nazaire), Université de Nantes (UN)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Universitaire de Technologie - La Roche-sur-Yon (IUT La Roche-sur-Yon), Université de Nantes (UN)-Institut Universitaire de Technologie - Nantes (IUT Nantes), Université de Nantes (UN), Laboratoire de thermocinétique [Nantes] (LTN), Centre National de la Recherche Scientifique (CNRS)-Université de Nantes (UN)
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Chemical Engineering Science
Chemical Engineering Science, Elsevier, 2016, 146, pp.357-368. ⟨10.1016/j.ces.2016.02.039⟩
ISSN: 0009-2509
DOI: 10.1016/j.ces.2016.02.039⟩
Popis: International audience; A simple procedure for measuring microalgae spectral absorption cross-section is proposed. It is based on normal-hemispherical transmittance and reflectance measurements. It was validated against direct measurements of the radiation characteristics of C. vulgaris. It can be used for other suspensions of absorbing and scattering particles. It can be used to predict and control light transfer and biomass productivity in PBRs. a b s t r a c t The spectral absorption cross-section of microalgae is an essential parameter in modeling the microalgae metabolism and growth kinetics as well as in estimating the productivity and efficiency of photo-bioreactors. This paper presents a simple experimental procedure for retrieving the average spectral absorption cross-section of concentrated microalgal suspensions. The method combines experimental measurements of the normal-hemispherical transmittance and reflectance of the suspensions in conventional cuvettes with an inverse method and analytical expressions obtained from the modified two-flux approximation accounting for absorption and multiple scattering. The method was validated with direct measurements of the scattering phase function and of the absorption and scattering cross-sections of freshwater microalgae Chlorella vulgaris. It was able to retrieve the absorption cross-section with acceptable accuracy. The latter was then used to estimate successfully the fluence rate using a simplified light transfer model, the local rate of photon absorption, and the biomass productivity in flat plate PBRs.
Databáze: OpenAIRE
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