Resumo:Os aterros sanitários contêm grande parcela de matéria orgânica devido à deposição de resíduos em suas células. A decomposição dessa matéria gera gases, como o metano, que é produzido em grande quantidade e que é o principal responsável pelo potencial energético do biogás. Diante da necessidade de diversificar a matriz energética do País para produção de eletricidade e de reduzir a emissão de gases de efeito estufa na atmosfera, a utilização do biogás pode revelar-se vantajosa. O objetivo deste estudo foi quantificar o potencial teórico do aproveitamento energético do biogás no aterro sanitário de Sabará/MG. Para isso, foi quantificada a geração de gás metano durante a vida útil do aterro. A partir desse ponto, determinou-se a potência de geração de energia e a quantidade de famílias que poderiam ser atendidas com esse potencial energético. Os resultados encontrados indicam que o aterro poderá produzir teoricamente, em seu 13º ano, 510.316,52 m³ de metano, capaz de gerar uma potência máxima de 4.312,11 KW/ano, atendendo o equivalente a 19.674 famílias. Palavras-chave:Resíduos Sólidos. Aterro Sanitário. Biogás. Energia.Abstract: Landfills contain a large amount of organic matter, due to the deposition of residues in its cells. The decomposition of organic matter generates gases, such as methane, which is generated in large quantities and which is the main constituent responsible for the energy potential of biogas. To face the need to diversify the Brazilian energy matrix and to reduce the emission of greenhouse gases, the use of biogas may present some advantages. The objective of this study was to quantify the theoretical potential of the biogas energy utilization in the Sabará / MG landfill. For this, the methane gas generation during the life of the landfill was quantified. From this point, the power of power generation and the number of families that could be met with this energy potential were determined. The results show the landfill will produce in its 13th year about 510,316.52 m³ of methane, capable of generating a maximum power of 4,312.11 KW / year, serving around 19,674 families.Palavras-chave: Solid Waste. Landfill. Biogas. Energy.

Shallow flows correspond to turbulent flows whose horizontal dimensions are considerably larger than the vertical one. In Hydraulic Engineering, they refer, e.g., to stormwater basins, stabilization ponds for wastewater treatment and aquaculture tanks. Since they involve low flow velocities, a continuous settling process often affects such shallow reservoirs. Therefore, it is important to expand the knowledge about the influence of its geometry on the hydrodynamic behavior and the sedimentation tendency. This paper aims to analyze flow patterns in a rectangular reservoir with symmetrically positioned upstream and downstream channels, taking into account three different flow rates under steady flow regime (0.50, 1.25 and 3.40 L/s). Experimental tests were performed in a laboratory prototype, consisted of a 3.0 m long and 2.0 m wide reservoir, with a maximum depth of 0.30 m. Also, it was applied the WOLF 2D software for numerical modeling of all variants. Experimentally, a symmetrical hydrodynamic behavior was observed only for the lowest flow rate, while the flow pattern was asymmetrical for the other cases. On the other hand, the numerical model indicated hydrodynamic symmetry for all scenarios.