Contribution of 3-D time-lapse ERT to the study of leachate recirculation in a landfill

Journal Article · Tue Mar 15 04:00:00 EDT 2011 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2010.09.005· OSTI ID:21550347

Clement, R ^[1]; Oxarango, L ^[1]; Descloitres, M ^[1]

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1. Laboratoire d'Etude des Transferts en Hydrologie et Environnement (LTHE, UMR 5564, CNRS, INPG, IRD, UJF), B.P. 53, 38041 Grenoble Cedex 9 (France)

Leachate recirculation is a key process in the operation of municipal waste landfills as bioreactors. It aims at increasing the moisture content to optimise the biodegradation. Because waste is a very heterogeneous and anisotropic porous media, the geometry of the leachate plume recirculation is difficult to delineate from the surface at the scale of the bioreactor site. In this study, 3-D time-lapse electrical resistivity tomography (ERT) was used to obtain useful information for understanding leachate recirculation hydrodynamics. The ERT inversion methodology and the electrode arrays were optimised using numerical modelling simulating a 3-D leachate injection scenario. Time-lapse ERT was subsequently applied at the field scale during an experimental injection. We compared ERT images with injected volumes to evaluate the sensitivity of time-lapse ERT to delineate the plume migration. The results show that time-lapse ERT can accomplish the following: (i) accurately locate the injection plume, delineating its depth and lateral extension; (ii) be used to estimate some hydraulic properties of waste.

• OSTI ID: 21550347
• Journal Information: Waste Management, Journal Name: Waste Management Journal Issue: 3 Vol. 31; ISSN WAMAE2; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BIODEGRADATION
BIOREACTORS
CHEMICAL REACTIONS
DECOMPOSITION
DIAGNOSTIC TECHNIQUES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRODES
FLUID MECHANICS
GEOMETRY
HYDRODYNAMICS
MANAGEMENT
MATERIALS
MATHEMATICS
MECHANICS
MOISTURE
MUNICIPAL WASTES
PHYSICAL PROPERTIES
PLUMES
POROUS MATERIALS
SANITARY LANDFILLS
TIME DEPENDENCE
TOMOGRAPHY
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES