Recent research published in the International Journal of Renewable Energy Development presents an innovative approach to repurposing mining-degraded areas in Brazil’s Quadrilátero Ferrífero region. The study, led by Alberto de Almeida Bossi Guimarães from the Graduate Program in Mechanical Engineering at the Federal University of Minas Gerais, proposes transforming inactive mine pits into reservoirs for Pumped Storage Hydropower (PSH) while also utilizing adjacent areas for Photovoltaic Power Plants (PV).
This dual approach not only addresses the issue of environmental degradation caused by mining but also offers a sustainable energy solution. The concept involves converting deactivated mine sites into hydraulic batteries that can store energy, which is particularly beneficial for balancing the intermittent nature of solar power generation. As Guimarães notes, “Utilizing inactive mines as PSH reservoirs and installing PV in adjacent mining-degraded areas are innovative and technologically feasible strategies.”
The study identifies a suitable pair of mine pits in the region that could collectively generate approximately 234.3 MW of electricity. The economic analysis indicates that the cost of the generated energy would range between U$112.26/MWh and U$167.22/MWh. This pricing positions the project as a competitive option in the energy market, contingent on prevailing energy prices.
The implications of this research extend beyond environmental restoration; it opens up commercial opportunities for various sectors. Energy companies could explore investments in these repurposed sites, capitalizing on the growing demand for renewable energy sources. Additionally, the mining industry could benefit from a positive shift in public perception by actively participating in sustainable practices that mitigate their environmental footprint.
Overall, the integration of pumped storage hydropower and photovoltaic systems in mining-degraded areas presents a promising pathway for achieving energy sustainability while addressing the legacies of mining operations. As the energy landscape continues to evolve, such innovative solutions will be crucial in driving both economic growth and environmental stewardship.
