Dimensionamento de mini-central de biogás para geração de energia eléctrica a uma Associação Agrícola através de dejectos de animais

Abstract

The purpose of this project is to dimension a mini-biogas plant whose raw material is swine manure, and to date, March 20, 2020, the association has 162 animals, of which 150 are pigs and 2 cattle and 10 goats. The association Batsirini Arombo, located in the administrative post of Catandica, after the end of the agricultural season is faced with the accumulation of waste that has no applicability for 9 months of each year and suffers from the expenses for the purchase of fuel for food. Mills, which process the cereals. Thus, it was decided to dimension a mini-biogas plant to use animal waste (biomass) to generate electriciy in order to feed the two mills. Biogas is a compound derived from the anaerobic fermentation (absence of oxygen) of biomass from plant, animal or human residues in the biodigester. Biomass from animal waste must be treated in a biodigestor, where, among several models of continuous hydraulic flow biodigesters, the Canadian model was chosen, as it is easy to build and easy to maintain, which is composed of a pit, a box of entry and discharge of waste, connected to the pit through drainage pipes and a PVC tarpaulin covering the pit, which serves as a place to store approximately 46.4 m 3 of biogas generated per day. Where this produced biogas has the capacity to feed the generator set (7kVA), which is used to generate electricity, with a view to feeding two 2.2kW mills. At the same time, there is the generation of biofertilizers (liquid organic fertilizer) to complement the fertilization of the fields in order to increase agricultural production and eliminate weeds.