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Driving competition in a complex ecosystem: application to anaerobic digestion

Abstract : —Anaerobic digestion is a wastewater treatment process where bacteria degrade an organic substrate and produce methane, which can be used as a biofuel. The first task when starting up an anaerobic digester is the increase of its microbial population. It is a delicate phase, which is still not well understood, and its influence on the digester's future performance is not well known. During this phase, we show that a competition between the various species occurs and finally some species become dominant. In this paper, extending the competitive exclusion principle, we propose to drive the competition during this start-up phase, by regulating the volatile fatty acids concentration, with the aim of selecting species with good performance in the standard operating mode of the process. This new "selective" start-up strategy should lead to more efficient ecosystems.
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Submitted on : Monday, December 8, 2014 - 5:39:33 PM
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  • HAL Id : hal-01091826, version 1


Pierre Masci, Olivier Bernard, Frédéric Grognard, Eric Latrille, Jean-Baptiste Sorba, et al.. Driving competition in a complex ecosystem: application to anaerobic digestion. European Control Conference, Aug 2009, Budapest, Hungary. ⟨hal-01091826⟩



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