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Assessment of percolation through a solid leach bed in dry batch anaerobic digestion processes

Shewani, Anil and Horgue, Pierre and Pommier, Sébastien and Debenest, Gérald and Lefebvre, Xavier and Gandon, Emmanuel and Paul, Etienne Assessment of percolation through a solid leach bed in dry batch anaerobic digestion processes. (2015) Bioresource Technology, 178. 209-216. ISSN 0960-8524

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Official URL: http://dx.doi.org/10.1016/j.biortech.2014.10.017

Abstract

This work aimed at assessing water percolation through a solid cow manure leach bed in dry batch AD processes. A laboratory-scale percolation column and an experimental methodology were set up. Water behaviour was modelled by a double porosity medium approach. An experimental procedure was proposed to determine the main hydrodynamic parameters of the multiphase flow model: the porosity, the permeability and the term for water exchange from macro- to micro-porosity. Micro- and macro-porosity values ranged from 0.42 to 0.70 m3⋅m-3 and 0.18 to 0.50 m3⋅m-3. Intrinsic permeability values for solid cow manure ranged from 5.55⋅10-11 to 4.75⋅10-9 m2. The term for water exchange was computed using a 2nd order model. The CFD tool developed was used to simulate successive percolation and drainage operations. These results will be used to design leachate recirculation strategies and predict biogas production in full-scale dry AD batch processes.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S0960852414014291
HAL Id:hal-01131165
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > GDF SUEZ (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Funders:
INEO - Région midi-Pyrénées - ADEME
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Deposited By: Gerald DEBENEST
Deposited On:13 Mar 2015 09:15

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