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One of the biggest sources of energy available in rural areas is biomass and agribusiness. The same appears in the form of plant and animal residues such as crop residues, animal manure, energy crops and agro-industrial effluents. These residues can be used by the farmer or agribusiness for direct burning in order to produce heat or production of biogas. Swine production generates large amounts of wastes causing environmental problems if left untreated. The same has lot of methane. The objective of this study was to evaluate the production cost of electricity through biogas from swine manure. It was found that the best option for the producer is selling carbon credit when the production cost of electricity is viable when sold to utility power. The best condition was found to generate 20 h d-1, when the time for return on investment is 8 years and the production of electricity is R$ 120.11 kWh.

Avaliação econômico-financeira da microgeração de energia elétrica proveniente de biogás da suinocultura