title: Reaction engineering analysis of Scenedesmus ovalternus in a flat-plate gas-lift photobioreactor.
abstract: Microalgal strains of the genus Scenedesmus are a promising resource for commercial biotechnological applications. The temperature-, pH- and light-dependent growth of Scenedesmus ovalternus has been investigated on a laboratory scale. Best batch process performance was obtained at 30°C, pH 8.0 and an incident photon flux density of 1300μmolphotonsm-2s-1using a flat-plate gas-lift photobioreactor. Highest growth rate (0.11h-1) and space-time yield (1.7±0.1gCDWL-1d-1) were observed when applying these reaction conditions. Biomass concentrations of up to 7.5±0.1gCDWL-1were achieved within six days (25.0±0.5gCDWm-2d-1). The light-dependent growth kinetics of S. ovalternus was identified using Schuster's light transfer model and Andrews' light inhibition model (KS=545μmolphotonsm-2s-1; KI=2744μmolphotonsm-2s-1; μmax=0.21h-1). The optimal mean integral photon flux density for growth of S. ovalternus was estimated to be 1223μmolphotonsm-2s-1.
authors.affiliation: Institute of Biochemical Engineering, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, Germany. Electronic address: a.koller@lrz.tum.de.
authors.forename: Anja Pia
authors.initials: AP
authors.lastname: Koller
authors.affiliation: Institute of Biochemical Engineering, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, Germany.
authors.forename: Lara
authors.initials: L
authors.lastname: Wolf
authors.affiliation: Institute of Biochemical Engineering, Technical University of Munich, Boltzmannstr. 15, 85748 Garching, Germany. Electronic address: d.weuster-botz@lrz.tum.de.
authors.forename: Dirk
authors.initials: D
authors.lastname: Weuster-Botz
mesh_terms: D018533:Biomass; D058086:Microalgae / Q000737:chemistry / Q000378:metabolism / Q000502:physiology; D008954:Models, Biological; D058433:Photobioreactors; D044444:Scenedesmus / Q000737:chemistry / Q000378:metabolism / Q000502:physiology
keywords: Flat-plate gas-lift photobioreactor; Growth kinetics; Scenedesmus ovalternus