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Updated: Feb 13, 2026

Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
Published on: June 15, 2014
Evaluation of alkalinity spatial distribution in an up-flow fixed bed anaerobic digester
Maha Hmissi1, Jérôme Harmand2, Victor Alcaraz-Gonzalez3
1Université de Tunis El Manar, École Nationale d'Ingénieurs de Tunis, Laboratoire de modélisation en Hydraulique et Environnement, B.P. 37, 1002 Tunis Le Belvédère, Tunisie E-mail: maha.hmissi@hotmail.fr; LBE, INRA, 11100 Narbonne, France.
Abstract:
In this paper, an experimental study upon alkalinity and hydrodynamic behavior in an anaerobic up-flow fixed bed reactor for the treatment of tequila vinasses is presented. Measurements of volatile fatty acids, pH, alkalinity and bicarbonate were obtained at three sampling points in the reactor in the axial axis. Then, the spatial distribution of alkalinity is studied and discussed. Moreover, for further control process purposes, a hydrodynamic model based on the use of two interconnected two-steps reduced AM2 type models is proposed and its parameters are identified using experimental data.
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