Prospecção de bactérias na microbiota de solos com capacidade de produção de energia

Abstract

The search for sustainable energy means has increased in the last decades, aiming to reduce the impacts caused in the production process and also, in the incorrect destination of waste, among these, are the batteries. The demand for these energy sources is very high, given the accelerated technological development, and thus, they are easily replaced, since their useful life is short, being discarded quickly. When these materials are incorrectly disposed, they generate a series of environmental problems and risks to human health, since they are considered toxic composed of heavy metals. Therefore, the development of sustainable biotechnological alternatives that use microorganisms for energy production, allows to solve the problems of efficiency, avoiding the generation of these residues, as well as the environmental problems caused by them. The objective of this work was to analyze the energy potential of soil bacteria from the Mangrove and Semi - arid, through the construction of the biobattery system, composed of bacterial consortia. Strains of four bacterial groups were used: 10 cathodic bacteria from the Manguezal (Mcat), 10 anode Manguezal (Man), 10 cathodic from the Semi-Arid (Scat) and 10 anodic from the Semi-Arid (San), totalizing 40 bacterial strains. The strains were subjected to gram staining, glass adhesion test, plaque gas test and bacterial antagonism test, as criteria for the formation of microbial consortia. The construction of the bacterial consortiums for the assembly of the system was done by means of the previous results of the test of antagonism and test of adhesion in glass. Four consortia were chosen, one from each bacterial group, to compose the biobattery system. The results show that the bacteria presented capacity of energy production, but more studies and laboratory experiments are still needed to optimize the production.