This article discusses an integrated operational arrangement for the remediation of the environmental impacts of landfills by implementing a hybrid electricity production system, which uses energy potential from municipal solid waste associated with solar energy (photovoltaics and thermal). This system composes a sustainable energy hub, which can provide numerous benefits in the recovery process of a closed landfill area. A case study is presented for the Jockey Clube landfill in Brazil, one of the largest landfill areas in Latin America, which was closed in 2018. Over 20 years of operation, the new hybrid plant is estimated to produce 2643 GWh of electricity and 964 GWh of heat from engine exhaust gases (529 ℃) and steam production. Additionally, it achieves a leachate load reduction of 500,000 m³ per year and decreases atmospheric emissions by 38.4 thousand tons CO₂eq. per year through clean energy production and methane combustion. By addressing both environmental remediation and energy generation concurrently, this study highlights the potential of hybrid systems to deliver both environmental and economic benefits. The findings underline the importance of innovative waste management strategies in transitioning toward a sustainable and low-carbon future within circular economy principles, directly contributing to Sustainable Development Goals (SDGs) 7 (affordable and clean energy), 11 (sustainable cities and communities), and 13 (climate action). This study proposes a practical and replicable framework for converting environmental liabilities into productive assets, contributing to sustainable waste management and resource recovery.

This study integrates legal timber harvesting, conservation efforts, and circular economy concepts in Amazonia by converting wood waste into charcoal via real-scale kilns in remote regions. Emphasizing the benefits of species-based segregation, residues from 23 tropical species were classified via principal component analysis into four distinct Groups (G1—G4), whereas G5 represented traditional mixed-species carbonization. A novel approach was used to assess the impact of species-based segregation on charcoal quality, combustion behavior, and logistical safety (spontaneous combustion risk) through proximate and calorific analyses, thermogravimetric analysis, combustion indices, and self-combustion experiments. To support the selection of high-performance and safer biofuels, multi-criteria decision analysis (MCDA) was applied to systematically rank charcoal groups by integrating physicochemical and thermal performance indicators. The segregated groups exhibited variations in fixed carbon (69.61—73.92%, dry basis (db)), volatile matter (21.87—27.58%, db), ash content (1.20—6.03%, db), and higher heating value (26.5—30.0 MJ·kg⁻¹). G1 (Dinizia excelsa) had the highest fixed carbon content, lowest ash content, and superior combustion behavior, whereas G5 had a lower ignition temperature and greater reactivity. Spontaneous combustion tests revealed no self-ignition in G1 and G4, whereas G2, G3, and G5 presented incidence rates of 75%, 50%, and 25%, respectively. MCDA enables a robust, multi-indicator evaluation of charcoal performance, producing a ranking (G1 > G4 > G5 > G3 > G2) that is consistent with the spontaneous combustion results. These findings highlight the potential of selective biomass utilization to produce higher-quality, safer, and more sustainable charcoal, reinforcing its role in circular bioenergy systems in the Amazon.