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Kinetic Modeling of Dunaliella tertiolecta Growth under Different Nitrogen Concentrations
Author(s) -
Fré Nicéia Chies Da,
Chagas Arthur Lygeros das,
Rech Rosane,
Marcílio Nilson Romeu
Publication year - 2016
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201500585
Subject(s) - nitrogen , biomass (ecology) , carotenoid , chemistry , kinetics , growth rate , biochemistry , biology , mathematics , agronomy , organic chemistry , physics , geometry , quantum mechanics
Mathematical models are presented to describe the relationship between nitrogen consumption, biomass growth, and carotenoid production by the microalgae Dunaliella tertiolecta BE 003 grown under nitrogen‐limited and nonlimited conditions. The nitrogen uptake was modeled by an n ‐order nitrogen‐catalyzed reaction. Three different expressions were proposed for the biomass‐specific growth rate. Carotenoid production was fitted using the Luedeking‐Piret equation. The nitrogen‐catalyzed expression proved to be adequate to model nitrogen uptake by D. tertiolecta over a wide range of nitrogen concentrations. Biomass expression must be improved to describe the cessation of growth when nitrogen is still available in the cultures. The Luedeking‐Piret expression successfully modeled the carotenoid production.