  Controlling microalgae cultivation, i.e., a crucial industrial topic today,
is a challenging task since the corresponding modeling is complex, highly
uncertain and time-varying. A model-free control setting is therefore
introduced in order to ensure a high growth of microalgae in a continuous
closed photobioreactor. Computer simulations are displayed in order to compare
this design to an input-output feedback linearizing control strategy, which is
widely used in the academic literature on photobioreactors. They assess the
superiority of the model-free standpoint both in terms of performances and
implementation simplicity.
