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Gradient-based optimization of a rotating algal biofilm process. Automatica,Vol 105, July 2019.


Microalgae are microorganisms which have been only recently used forbiotechnological applications, especially in the perspective of biofuel production. Here we focus on theshape 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.

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Industrial Engineer

Mathis Mei

Mathis, thanks to his knowledge as a bio-process engineer and his past experiences in the field of microalgae, contributes to the transfer of R&D innovations to the industrial level. Graduated from the School of Industrial Biology (EBI) and Compiègne University of Technology (UTC), he combines his passion for biotechnologies with his desire for innovation.