Avaliação da produção de biogás na Ete de Muritiba-BA

Abstract

The hydraulic energy is still the main primary source in Brazilian energy matrix. Therefore, diversification in this matriz is desirable, motivating the search for alternative energy sources, such as biomass from the anaerobic digestion treatment. The final step in the anaerobic degradation process results in biogas production. The chemical energy into the Biogas can be converted in mechanical energy by thermal motors. The present study aims to estimate the biogas potential produced by Upflow Anaerobic Sludge Blanket Reactors of the STP of Muritiba - BA as primary energy source. Physical-chemical analyzes were performed in the sewage in order to determine the efficiency of the treatment. The model proposed by the bibliography was used to determine the biogas and electricity production, and for the validation of the theoretical data, a prototype of the anaerobic biodigestion system. The organic load removed from the UASB reactor showed an efficiency of removal of TSS, BOD and COD about 62%, 73% and 79%, respectively. Since it constitutes a primary treatment, an expected operation was verified in agreement with standards in the literature. Electricity production indicates that the biogas produced in the STP is sufficient to supply a community with 175 people. The production of biogas verified in the prototype during the daytime shows similarity with that obtained by the theoretical model.