Influência da sazonalidade na qualidade do biogás gerado na estação de tratamento de esgoto da Sanepar de Francisco Beltrão – PR

Abstract

The sanitary sewage treatment already utilizes methods and equipment which are well-stablished in the commercial perspective. However, in the past few years, the appeal for renewable energy sources brought up the debate around the exploitation of biogas produced in sewage treatment plants (STP). This study analyzed the SANEPAR STP in Francisco Beltrão – PR, where the biological treatment of domestic sewage occurs through the anaerobic degradation of microorganisms inside the UASB reactors, which results in two byproducts when under favorable conditions: mud and gas. The study emphasized on the harvesting of the produced gas, denominated biogas, during the months of July to October 2017, in order to assess the concentration of methane (CH4), carbon gas (CO2), ammonia (NH3) and sulfidric gas (H2S). it was used the Alfakit Biogas Analysis with Microprocessed Biofoto Kit®, utilizing the colorimetric method and the Orsat method. The classification of the data made possible to identify averages on the percentage, which were compared to the literature and they were identified as in accordance with the majority of authors when referring to carbon gas, but they in conflict with them when related to ammonia and sulfidric gas. With respect to methane, with a high rate of 84,66%, it was pointed as in accordance with only one author of the bibliography.