A model of a syntrophic relationship between two microbial species in a chemostat including maintenanceReport as inadecuate




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1 UMR ITAP - Information – Technologies – Analyse Environnementale – Procédés Agricoles 2 LEE - Laboratoire d-Économie de l-Elevage

Abstract : Many microbial ecosystems can be seen as microbial -food chains- where the different reaction steps can be seen as such: the waste products of the organisms at a given reaction step are consumed by organisms at the next reaction step. In the present paper we study a model of a two-step biological reaction with feedback inhibition, which was recently presented as a reduced and simplified version of the anaerobic digestion model ADM1 of the International Water Association IWA. It is known that in the absence of maintenance or decay the microbial -food chain- is stable. In a previous study, using a purely numerical approach and ADM1 consensus parameter values, it was shown that the model remains stable when decay terms are added. However, the authors could not prove in full generality that it remains true for other parameter values. In this paper we prove that introducing decay in the model preserves stability whatever its parameters values are and for a wide range of kinetics.

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Keywords : CHEMOSTAT MICROBIAL ECOLOGY FOOD CHAINS MICROBIOLOGY KINETICS

Mots-clés : ECOLOGIE MICROBIENNE CHAINE ALIMENTAIRE MICROBIOLOGIE CINETIQUE





Author: T. Sari - J. Harmand -

Source: https://hal.archives-ouvertes.fr/



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