[en] Droop model is a well-established mathematical model for describing the effect of nutrient limitation on the growth of micro-algae. The main feature of this model is the consideration of two mechanisms: (a) substrate uptake so as to build an internal pool, following a Monod kinetic law and (b) biomass growth, based on the consumption of the nutrient stored in the internal pool, following a so-called Droop kinetic law, which involves a minimum internal quota. This
model has demonstrated its predictive capacity in several experimental studies. However, the identification of the model
parameters is a delicate task, which requires informative experimental data. The purpose of this study is to estimate
the parameters of a Droop model for the marine micro-algae Dunaliella tertiolecta, and to investigate the use of conventional
on-line measurement probes for the extracellular nitrogen concentration. Droop model considers the substrate (s) (inorganic nitrogen), the internal quota (qn) and the biomass (x) in terms of organic carbon.
