title: Modeling of photosynthesis and respiration rate for Isochrysis galbana (T-Iso) and its influence on the production of this strain.
abstract: Isochrysis galbana is a widely-used strain in aquaculture in spite of its low productivity. To maximize the productivity of processes based on this microalgae strain, we have developed a model considering the influence of irradiance, temperature, pH and dissolved oxygen concentration on the photosynthesis and respiration rate. Results demonstrate that this strain tolerates temperatures up to 35 °C but it is highly sensitive to irradiances higher than 500 μE m(-2)s(-1) and dissolved oxygen concentrations higher than 11 mgl(-1). We have validated the developed model using data from an industrial-scale outdoor tubular photobioreactor demonstrating that inadequate temperature and dissolved oxygen concentrations reduce productivity to half that which is maximal, according to light availability under real outdoor conditions. The developed model is a useful tool for managing working processes, but especially in the development of new processes based on this strain and to take decisions regarding optimal control strategies.
authors.affiliation: Dpt Biological, Geological and Env. Sciences, Univ. Bologna, 48123 Ravenna, Italy.
authors.forename: Davide
authors.initials: D
authors.lastname: Ippoliti
authors.affiliation: Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre from University of Almería-CIEMAT, 04120 Almería, Spain.
authors.forename: Cintia
authors.initials: C
authors.lastname: Gómez
authors.affiliation: Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre from University of Almería-CIEMAT, 04120 Almería, Spain.
authors.forename: María
authors.initials: M
authors.lastname: del Mar Morales-Amaral
authors.affiliation: Dpt Biological, Geological and Env. Sciences, Univ. Bologna, 48123 Ravenna, Italy.
authors.forename: Rossella
authors.initials: R
authors.lastname: Pistocchi
authors.affiliation: Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre from University of Almería-CIEMAT, 04120 Almería, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Fernández-Sevilla
authors.affiliation: Department of Chemical Engineering, University of Almería, 04120 Almería, Spain; CIESOL, Joint Centre from University of Almería-CIEMAT, 04120 Almería, Spain. Electronic address: facien@ual.es.
authors.forename: F Gabriel
authors.initials: FG
authors.lastname: Acién
mesh_terms: D018533:Biomass; D058087:Haptophyta / Q000378:metabolism*; D008027:Light; D058086:Microalgae; D008954:Models, Biological; D058433:Photobioreactors; D010788:Photosynthesis; D013696:Temperature
keywords: Microalgae; Modeling; Photobioreactors; Photosynthesis rate; Respiration rate