ENERGY POTENTIAL OF BIOGAS FROM PIG FARMS IN THE STATE OF MINAS GERAIS, BRAZIL

• Published in: Engenharia agrícola Vol. 40; no. 3; pp. 396 - 404
• Main Authors: Sousa, Izabelle de P., Rosa, André P., Borges, Alisson C., Renato, Natália dos S.
• Format: Journal Article
• Language: English
• Published: Sociedade Brasileira de Engenharia Agrícola 01.06.2020
• Subjects: anaerobic digestion; biogas; covered lagoon biodigester; energy recovery; pig farming
• ISSN: 0100-6916; 1809-4430
• DOI: 10.1590/1809-4430-eng.agric.v40n3p396-404/2020

ABSTRACT Pig farming stands out as an alternative for decentralized electrical energy production from the use of biogas energy. However, its use is still limited. Thus, this study aimed to estimate and map the biogas production, as well as determine the electric power originated by the use of biogas produced in covered lagoon biodigester from pig farms of different sizes in the state of Minas Gerais, Brazil. The research was based on data provided by the Instituto Mineiro de Agropecuária (IMA). Three forms of electric power were estimated, as follows: (i) total, (ii) current, and (iii) installed. They were estimated from the volume of manure generated at each development stage of the animals. The total electric power corresponded to 31 MW, while the current electric power was equal to 20 MW. The installed electric power was still low and corresponded to 35.4% of the current electric power. The results showed that 55% of the current electric power was concentrated in only two mesoregions (Triângulo Mineiro/Alto Paranaíba and Zona da Mata). Therefore, the use of biogas contributed to providing energy self-sufficiency in pig farms and the generation of decentralized electrical energy.