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Three-reaction model for the anaerobic digestion of microalgae

Francis Mairet 1, 2 Olivier Bernard 1 Elliot Cameron 3 Monique Ras 4 Laurent Lardon 4 Jean-Philippe Steyer 1, 4 Benoît Chachuat 3, 5 
1 BIOCORE - Biological control of artificial ecosystems
LOV - Laboratoire d'océanographie de Villefranche, CRISAM - Inria Sophia Antipolis - Méditerranée , INRA - Institut National de la Recherche Agronomique
2 Anlysis and Mathematical Modeling, Valparaiso
Departamento de Matematica [Valparaiso]
Abstract : Coupling an anaerobic digester to a microalgal culture has received increasing attention as an alternative process for combined bioenergy production and depollution. In this article, a dynamic model for anaerobic digestion of microalgae is developed with the aim of improving the management of such a coupled system. This model describes the dynamics of inorganic nitrogen and volatile fatty acids since both can lead to inhibition and therefore process instability. Three reactions are considered: Two hydrolysis-acidogenesis steps in parallel for sugars/lipids and for proteins, followed by a methanogenesis step. The proposed model accurately reproduces experimental data for anaerobic digestion of the freshwater microalgae Chlorella vulgaris with an organic loading rate of 1 gCOD L−1 d−1. In particular, the three-reaction pathway allows to adequately represent the observed decoupling between biogas production and nitrogen release. The reduced complexity of this model makes it suitable for developing advanced, model-based control and monitoring strategies
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Submitted on : Wednesday, April 14, 2021 - 3:21:53 PM
Last modification on : Saturday, June 25, 2022 - 11:50:02 PM
Long-term archiving on: : Thursday, July 15, 2021 - 6:58:56 PM


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Francis Mairet, Olivier Bernard, Elliot Cameron, Monique Ras, Laurent Lardon, et al.. Three-reaction model for the anaerobic digestion of microalgae. Biotechnology and Bioengineering, 2012, 109 (2), pp.415-425. ⟨10.1002/bit.23350⟩. ⟨hal-00848426⟩



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