Perspectivas da produção do biogás a partir da codigestão de lodo de esgoto e resíduos alimentares: revisão sistemática

Abstract

In an attempt to reduce climate damage from greenhouse gas emissions, have been using renewable energy sources. One of these options is biomass energy to biogas production through the process of anaerobic digestion. This process depends on several operational factors to maintain the stability of the anaerobic reactor and produce a considerable amount of biogas. Co-digestion was adopted, contributing to the increase of biogas yield in the system. This study carried out a survey, mapping, and analysis on biogas production from the co-digestion of sewage sludge and food waste over the last ten years through a systematic review. The objective was to investigate the influence of operational conditions on the production of methane, for this were analyzed the mode of operation of the system and the abiotic factors that influence the anaerobic digestion process using statistical methods. From these analyses, was identified a positive correlation between temperature and pH. As well as negative correlations between OLR and pH, temperature and OLR, OLR and HRT, OLR and methane content, pH and methane content. These analyzes demonstrated that several operating conditions are directly or indirectly related. From the analysis and data from the literature, were suggested ideal values for the operational factors for system optimization. It was identified that the performance of the anaerobic digestion process depends on the type of biomass, the influence of abiotic factors on the process, and the operational conditions of the reactor.