Dynamics and control of a periodically forced microalgae culture

Type Article
Date 2019
Language English
Author(s) Martínez Carlos1, 2, Mairet FrancisORCID4, Martinon Pierre3, Bernard Olivier1, 2
Affiliation(s) 1 : Université Côte d’Azur, Inria, INRA, CNRS, UPMC Univ Paris 06, BIOCORE team, France
2 : LOV-UPMC Sorbonne-CNRS, UMR 7093, Station Zoologique, B.P. 28, 06234 Villefranche-sur-mer, France
3 : INRIA, Saclay, École Polytechnique, CMAP 91128 Palaiseau, France
4 : IFREMER, PBA, Nantes, France
Source Ifac Papersonline (2405-8963) (Elsevier BV), 2019 , Vol. 52 , N. 1 , P. 922-927
DOI 10.1016/j.ifacol.2019.06.180
WOS© Times Cited 2
Keyword(s) Dynamics and control, Industrial biotechnology, Wastewater, Biomass productivity, Microalgae
Abstract

Microalgae cultivation with wastewater is a promising way of reducing the energetic needs for wastewater treatment and the costs of biofuel production. However, the very turbid medium is not favorable for the development of microalgae. Indeed, light, the key element for photosynthesis, rapidly vanishes along depth due to absorption and scattering. Therefore it is crucial to understand the effects of the depth on turbid cultures. In this work, we study theoretically the long-term behavior of a continuous culture of microalgae exposed to a periodic source of light. By allowing periodic variations of the depth and the hydraulic retention time, we show that the microalgae population is forced to a periodic regime. Finally, we address numerically the problem of determining the optimal variations of the depth and the hydraulic retention time for maximizing the productivity of the culture in the periodic regime.

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