Estudo da influência na concentração de sulfeto de hidrogênio pela injeção de ar, no gasômetro, em biodigestores que tratam dejetos de suínos

Abstract

Sustainability is increasingly present in everyday life due to the improvement of techniques for using waste. Anaerobic digestion has been widely used due to the fact that it generates biogas that can be used to transform into energy. However, one of its components, hydrogen sulfide, causes damage to the operation of the process, therefore, its proper reduction is important. In this work, a study is presented to evaluate the efficiency of H2S removal, by injecting atmospheric air into the gasometer located at the top of the biodigester, based on data measured weekly by a company responsible for the process. The results of two properties with approximately the same number of pigs housed in the farm whose management was finishing were compared. The evaluated period comprised from October 9, 2019 to October 26, 2021. It was verified, in the two analyzed properties, that the micro-aeration process reduced the concentrations of H2S.