title: Experimental and theoretical assessment of the multi-domain flow behaviour in a waste body during leachate infiltration.
abstract: The optimisation of landfill operation is a key challenge for the upcoming years. A promising solution to improve municipal solid waste (MSW) management is the bioreactor technology. A meso-scale (around 1m(3)) experimental set-up was performed to study the effect of moisture control in low density conditions with different leachate injection operations and bioreactor monitoring including the use of a neutron probe. The moisture content distribution evolution demonstrates a multi-domain flow behaviour. A classic van Genuchten-Mualem description of the connected porosity proved insufficient to correctly describe the observed phenomena. A bimodal description of the connected porosity is proposed as solution and a connected/non-connected porosities numerical model was applied to the results. The model explains the experimental results reasonably well.
authors.affiliation: Laboratoire d'etude des Transferts en Hydrologie et Environnement, Universite de Grenoble, BP 53 38041, Grenoble Cedex 09, France. tinet@ujf-grenoble.fr
authors.forename: A-J
authors.initials: AJ
authors.lastname: Tinet
authors.forename: L
authors.initials: L
authors.lastname: Oxarango
authors.forename: R
authors.initials: R
authors.lastname: Bayard
authors.forename: H
authors.initials: H
authors.lastname: Benbelkacem
authors.forename: G
authors.initials: G
authors.lastname: Stoltz
authors.forename: M J
authors.initials: MJ
authors.lastname: Staub
authors.forename: J-P
authors.initials: JP
authors.lastname: Gourc
mesh_terms: D019149:Bioreactors; D057446:Hydrodynamics; D008962:Models, Theoretical; D016062:Porosity; D012037:Refuse Disposal; D014874:Water Pollutants, Chemical
chemical_list: D014874:Water Pollutants, Chemical