Abstract
Abstract Biogas is an important alternative source of energy in the National Interconnected System (SIN) of Brazil, being a strategic option that offers economic advantages and reduction of negative environmental impacts arising from the use of fossil fuels. Therefore, this study aimed to estimate biogas and methane gas generation in a landfill located in the municipality of Minas do Leao, in the south of Brazil. Methane gas volume was estimated using three first-order decay models: CDM Tool, LandGem, and IPCC. CDM Tool model estimation for methane gas was 28E05m3 for the year of the greatest generation, 2025. While for LandGem and IPCC Models, the peak generation was observed in 2026, and methane gas estimates were 107E05m3 and 23E05m3, respectively. CDM Tool and IPCC Models showed similar results, revealing greater precision and thus reliability. On the other hand, the LandGem model overestimated generation.
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