Potencial de produção de biometano a partir da vinhaça no estado de Alagoas

Abstract

The state of Alagoas has a rich tradition in sugarcane cultivation, resulting in a significant production of ethanol and sugar. However, the ethanol production process generates a byproduct known as vinasse, which stands out as a highly polluting residue, especially when compared to other substances, due to its high organic load characteristics. Nevertheless, this characteristic endows this byproduct with great potential for biogas generation. In this context, this work assessed the potential for biomethane production from vinasse in the state. Based on the collected data, the potential for biomethane production was estimated, and subsequently, a thematic map was developed to analyze the regions with the greatest potential for resource allocation for biomethane generation, in order to guide investments in renewable energy in the region. Additionally, the quantification of financial return was carried out based on the estimated biomethane production, through environmental assets such as Cbios and carbon credits. It was observed that the state presents significant potential in the municipalities of the eastern region, generating an estimated volume of biomethane of 40,119,699 Nm³, which if employed instead of diesel would reduce carbon emissions by 89%, in addition to providing a financial return of R$ 30.977.011 (Thirty million, nine hundred and seventy-seven thousand and eleven reais.) in carbon credits. Therefore, it is demonstrated that the use of vinasse presents great potential.