Improvement of electrical resistivity tomography for leachate injection monitoring

Waste Management
R ClémentJ-P Gourc

Abstract

Leachate recirculation is a key process in the scope of operating municipal waste landfills as bioreactors, which aims to increase the moisture content to optimize the biodegradation in landfills. Given that liquid flows exhibit a complex behaviour in very heterogeneous porous media, in situ monitoring methods are required. Surface time-lapse electrical resistivity tomography (ERT) is usually proposed. Using numerical modelling with typical 2D and 3D injection plume patterns and 2D and 3D inversion codes, we show that wrong changes of resistivity can be calculated at depth if standard parameters are used for time-lapse ERT inversion. Major artefacts typically exhibit significant increases of resistivity (more than +30%) which can be misinterpreted as gas migration within the waste. In order to eliminate these artefacts, we tested an advanced time-lapse ERT procedure that includes (i) two advanced inversion tools and (ii) two alternative array geometries. The first advanced tool uses invariant regions in the model. The second advanced tool uses an inversion with a "minimum length" constraint. The alternative arrays focus on (i) a pole-dipole array (2D case), and (ii) a star array (3D case). The results show that these two advanc...Continue Reading

References

Jun 19, 2001·Journal of Hazardous Materials·G L Yoon, J B Park
Apr 11, 2002·Waste Management·Mostafa Warith
Jun 13, 2002·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Debra R ReinhartTimothy Townsend
Sep 24, 2004·Waste Management·Roger GuérinSolenne Grellier
Jul 11, 2006·Waste Management·Paul T ImhoffRamin Yazdani
Oct 4, 2006·Waste Management·Milind V Khire, Moumita Mukherjee
Jan 19, 2007·Journal of Experimental Botany·Said Attia Al Hagrey

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Citations

Aug 28, 2016·Environmental Science and Pollution Research International·T JouenJ Tournebize
Apr 26, 2019·Environmental Science and Pollution Research International·Ping YangYa-Fei Pan
Mar 6, 2021·Waste Management·Marta KondrackaDariusz Ignatiuk
Sep 2, 2021·The Science of the Total Environment·Abotalib Z AbotalibMohamed Attwa

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