Leachate recirculation: moisture content assessment by means of a geophysical technique

Waste Management
Roger GuérinSolenne Grellier

Abstract

Bioreactor technology is a waste treatment concept consisting in speeding up the biodegradation of landfilled waste by optimizing its moisture content through leachate recirculation. The measurement of variations in waste moisture content is critical in the design and control of bioreactors. Conventional methods such as direct physical sampling of waste reach their limits due to the interference with the waste matrix. This paper reviews geophysical measurements such as electrical direct current and electromagnetic slingram methods for measuring the electrical conductivity. Electrical conductivity is a property, which is linked to both moisture and temperature and can provide useful indications on the biodegradation environment in the waste mass. The study reviews three site experiments: a first experimentation shows the advantages (correlation between conductive anomaly and water seepage) but also the limits of geophysical interpretation; the two other sites allow the leachate recirculation to be tracked by studying the relative resistivity variation versus time from electrical 2D imaging. Even if some improvements are necessary to consider geophysical measurements as a real bioreactor monitoring tool, results are promising and...Continue Reading

References

Apr 11, 2002·Waste Management·Mostafa Warith
Sep 6, 2003·Waste Management·Nitin A GawandeTimothy G Townsend

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Citations

Jul 11, 2006·Waste Management·Paul T ImhoffRamin Yazdani
Apr 8, 2006·Journal of Hazardous Materials·Solenne GrellierNathalie Skhiri
May 17, 2019·Environmental Science and Pollution Research International·Liang-Tong ZhanZhen-Ying Zhang
Apr 3, 2020·Waste Management·Richard Nasilele MutafelaWilliam Hogland
Mar 6, 2021·Waste Management·Marta KondrackaDariusz Ignatiuk
Apr 17, 2021·Environmental Monitoring and Assessment·Nataly ArandaOswaldo Guzmán

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