Estudo de viabilidade de implementação de um sistema de biogás com vista na produção de energia eléctrica para alimentar uma área em Katembe

Abstract

This paper proposes a feasibility study for the implementation of a biogas system to generate electrical energy for an area located in Katembe. The system utilizes food waste from local markets and cattle manure as raw materials. The idea emerged from the need to address the region's energy challenges, characterized by limitations in energy distribution and a high reliance on non-renewable sources, such as diesel generators, which are costly and environmentally harmful. The approach relies on food waste from the Zimpeto and Malanga markets, as well as cattle manure, as primary substrates. A collection and processing system was designed to ensure a constant supply of raw materials to the covered lagoon biodigester, chosen for its capacity to handle the estimated daily volume of 4,821.67 Nm³ of biogas. This biogas will be converted into approximately 7.149,7 kWh of electricity per day using the Caterpillar CG132B-12 internal combustion engine, which is efficient for continuous operations in distributed generation systems. From an economic perspective, the project considered installation and operational costs, which are competitive for systems of this scale, and demonstrated an attractive return on investment potential. The sale of electricity to EDM l helps offset costs over time. Socioeconomic and environmental assessments revealed multiple benefits, including job creation, reduced energy costs, relief for EDM's electrical grid, improved waste management, and lower greenhouse gas emissions. These findings confirm that the project is not only viable but also sustainable, serving as a model for similar initiatives in other regions.