title: Photobioreactors for microalgal cultures: A Lagrangian model coupling hydrodynamics and kinetics.
abstract: Closed photobioreactors have to be optimized in terms of light utilization and overall photosynthesis rate. A simple model coupling the hydrodynamics and the photosynthesis kinetics has been proposed to analyze the photosynthesis dynamics due to the continuous shuttle of microalgae between dark and lighted zones of the photobioreactor. Microalgal motion has been described according to a stochastic Lagrangian approach adopting the turbulence model suitable for the photobioreactor configuration (single vs. two-phase flows). Effects of light path, biomass concentration, turbulence level and irradiance have been reported in terms of overall photosynthesis rate. Different irradiation strategies (internal, lateral and rounding) and several photobioreactor configurations (flat, tubular, bubble column, airlift) have been investigated. Photobioreactor configurations and the operating conditions to maximize the photosynthesis rate have been pointed out. Results confirmed and explained the common experimental observation that high concentrated cultures are not photoinhibited at high irradiance level.
authors.affiliation: Bioprocess Engineering, AlgaePARC, Wageningen University, Droevendaalsesteeg 1, 6700AA, Wageningen, The Netherlands.|Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli "Federico II,", P.le V. Tecchio, 80, 80125, Napoli, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Olivieri
authors.affiliation: Dept. of Chemical Engineering, University College of London, Torrington Place, London, WC1E 7JE, U.K.
authors.forename: Luigi
authors.initials: L
authors.lastname: Gargiulo
authors.affiliation: Dept. of Chemical Engineering, University College of London, Torrington Place, London, WC1E 7JE, U.K.
authors.forename: Paola
authors.initials: P
authors.lastname: Lettieri
authors.affiliation: Dept. of Chemical Engineering, University College of London, Torrington Place, London, WC1E 7JE, U.K.
authors.forename: Luca
authors.initials: L
authors.lastname: Mazzei
authors.affiliation: Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli "Federico II,", P.le V. Tecchio, 80, 80125, Napoli, Italy.
authors.forename: Piero
authors.initials: P
authors.lastname: Salatino
authors.affiliation: Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli "Federico II,", P.le V. Tecchio, 80, 80125, Napoli, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Marzocchella
mesh_terms: D018533:Biomass; D057446:Hydrodynamics; D008027:Light; D058086:Microalgae / Q000378:metabolism*; D008962:Models, Theoretical; D058433:Photobioreactors / Q000382:microbiology*; D010788:Photosynthesis
keywords: hydrodynamic; light; microalgae; photobioreactor; random walk; turbulent dispersion