Abstract
This work integrated in a process simulation, the anaerobic digestion of swine slurry and three technological alternatives for the energetic use of biogas. In addition, the energy yield and technical-economic feasibility were evaluated under different swine population scenarios in Cuba. Aspen Plus v12.0 was used to incorporate the alternatives analyzed: steam generator, internal combustion engine and heat recovery boiler. The results of the study indicated energy efficiencies between 79%-85%, TIR between 36%-43%, VAN between 2578818.80$-1975810.72$, with a PRD between 2.8 and 3.5 years. The profitability of the project was found to be most sensitive to the variation in the scenarios of pig population per alternative, with scenario 4 being the most profitable. The study provides important insights into the use of this renewable energy sources in rural areas, with a focus on environmental sustainability. Key Words: Biogas, energy efficiency, Aspen modelling, economic analysis.
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