Skip to Main content Skip to Navigation
Journal articles

Gradient-based optimization of a rotating algal biofilm process

Pierre-Olivier Lamare 1 Nina Aguillon 2 Jacques Sainte-Marie 3 Jérôme Grenier 4 Hubert Bonnefond 5 Olivier Bernard 1
1 BIOCORE - Biological control of artificial ecosystems
CRISAM - Inria Sophia Antipolis - Méditerranée , INRA - Institut National de la Recherche Agronomique, LOV - Laboratoire d'océanographie de Villefranche
3 ANGE - Numerical Analysis, Geophysics and Ecology
Inria de Paris, LJLL (UMR_7598) - Laboratoire Jacques-Louis Lions
Abstract : Microalgae are microorganisms which have been only recently used for biotechnological applications, especially in the perspective of biofuel production. Here we focus on the shape optimization and optimal control of an innovative process where the microalgae are fixed on a support. They are thus successively exposed to light and dark conditions. The resulting growth can be represented by a dynamical system describing the denaturation of key proteins due to an excess of light. A Partial Differential Equations (PDE) model of the Rotating Algal Biofilm (RAB) is then proposed, representing local microalgal growth submitted to the time varying light. An adjoint-based gradient method is proposed to identify the optimal (constant) process folding and the (time varying) velocity of the biofilm. When applied to a realistic case, the optimization points out a particular configuration which significantly increases the productivity compared to a base case where the biofilm is fixed.
Document type :
Journal articles
Complete list of metadatas

Cited literature [26 references]  Display  Hide  Download

https://hal.inria.fr/hal-02422853
Contributor : Jean-Luc Gouzé <>
Submitted on : Monday, December 23, 2019 - 12:21:45 PM
Last modification on : Thursday, December 10, 2020 - 10:45:39 AM
Long-term archiving on: : Tuesday, March 24, 2020 - 1:40:09 PM

File

RAB_Automatica_17-1082.pdf
Files produced by the author(s)

Identifiers

Citation

Pierre-Olivier Lamare, Nina Aguillon, Jacques Sainte-Marie, Jérôme Grenier, Hubert Bonnefond, et al.. Gradient-based optimization of a rotating algal biofilm process. Automatica, Elsevier, 2019, 105, pp.80-88. ⟨10.1016/j.automatica.2019.02.043⟩. ⟨hal-02422853⟩

Share

Metrics

Record views

429

Files downloads

1367