Enhancing landfill mining assessments: a dual-method approach using electrical resistivity and UAV photogrammetry at Buriram landfill

This study explores the potential of conducting landfill mining at Thailand’s Buriram landfill based on a combination of resistivity investigation and surveys conducted with unmanned aerial vehicles (UAVs). Landfill mining is a solution for managing waste buildup and recovering valuable resources; however, it is essential to conduct initial technical feasibility assessments to ensure the viability of such projects. In this study, electrical resistivity imaging is combined with UAV photogrammetry to qualitatively and quantitatively evaluate municipal solid waste in old and new landfill areas. The qualitative findings indicate a relationship between electrical resistivity values and waste composition, with higher resistivity values recorded in areas containing significant plastic content (r = 0.52). The total volumes of solid waste in the old and new landfill sites were calculated as ~ 271,500 m³ and ~ 336,900 m³, respectively, with an estimated refuse-derived fuel production potential of around 43,053 tons and 55,244 tons across both areas. A financial analysis confirmed the feasibility of the project. This integrated approach facilitated reliable data collection, which is crucial for evaluating the viability of landfill mining projects. By adopting a similar methodology, the decision-making accuracy for landfill mining projects can be improved to support effective waste management practices.