Potencial energético do biogás produzido a partir de esterco bovino e bagaço da cana-de-açúcar no estado de Alagoas

Abstract

ABSTRACT

The concern with the energy crisis in recent decades has led the world to seek new lternative sources of energy, preferably renewable sources. Among the various alternative sources of energy, biogas has been gaining prominence because it is easily produced from the anaerobic digestion of organic substrates that have different energy potentials. Sugarcane bagasse and cattle manure are potential fermentation substrates for biogas production due to the abundance of these raw materials in Brazil, especially in the state of Alagoas. Given the above, the present work aimed to carry out a comparative analysis of the energy potential of two fermentative extracts (bovine manure and sugarcane bagasse) in the State of Alagoas. To obtain manure and bagasse production data, a literature on scientific search platforms such as Science Direct, Google Scholar, PubMed, Periodical Capes, IBGE, EMBRAPA and Única, survey was carried out and the potential for biogas generation was estimated based on mathematical models previously available in the literature. Excel and Origin 8.0 software were used to obtain the results, generating graphs and figures with analysis of the data obtained. The results indicated that cattle manure would be capable of generating, on average, 12,4 MW of energy, when using an engine for energy generation with a yield of 29%, being lower than that presented by the sugarcane bagasse which was 390.4 MW. In addition, all the energy generated by the bagasse would be enough to supply the state's plants and supply the population of the entire state. Based on the above, it was possible to conclude that the State of Alagoas has great potential to produce clean energy from biomass, mainly from sugarcane bagasse. Keywords: sugar cane; cattle breeding; biomass; renewable energy; energy potential.