Análise do potencial energético da codigestão anaeróbia de resíduos sólidos orgânicos e efluentes gerados no Campus A.C. Simões

• Ano de defesa: 2019
• Autor(a) principal: Correia, Bruno César Morais
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Alagoas; Brasil; Programa de Pós-Graduação em Mestrado Profissional em Energia da Biomassa; UFAL
• Palavras-chave em Português: Resíduo orgânico - Campus A. C. Simões; Efluente; Codigestão; Metano; Organic waste - Campus A. C. Simões; Effluent; Co-digestion; Methane; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::ENERGIA DE BIOMASSA FLORESTAL
• Link de acesso: http://www.repositorio.ufal.br/handle/riufal/5920

The Federal University of Alagoas (UFAL) has more than 30,000 users, including teachers, students and technicians. A large amount of organic waste is generated and no type of recovery is carried out. Only the University Restaurant (R.U.) generates more than two tons of organic waste weekly. In the case of sewage disposal, the UFAL collection network is responsible for attending the A.C. Simões Campus in addition to the University Hospital (HUPAA). The present work aims to characterize the organic residue generated in the R.U. and the effluent captured by UFAL, besides analyzing the potential of methane (CH4) generation from the codigestion between these two substrates. For this, 5 anaerobic reactors were initially assembled, in duplicate and in batch, with different proportions of substrates. Initial and final physical-chemical characterizations of the substrates were performed. The gases generated in the reactors were analyzed by gas chromatography. After 35 days of collection, only reactors that did not contain organic residue generated methane. In the others there was an inhibition of the methane production. The high COD value of the organic residue was a relevant factor to collapse the methanogenic production. Using the same organic residue, effluent and sludge that had been frozen, the reactor was assembled with equal amounts of the three substrates. Unlike the other reactors that contained organic residue, the VI reactors produced methane, but in a small amount, as well as the others, there was acidification of the reactors. From the data obtained from the generated quantity of methane by the reactors, a comparison was made with the costs of consumption of liquefied petroleum gas (LPG) by the R.U. and of electric energy by UFAL and verified that it would be possible to replace the cylinders used in the R.U. by the methane originating from the anaerobic decomposition of the lagoon, as a source of combustion. And if it used all the methane produced in the lagoons as a source of electricity, it would generate an economy of 0.91%, in relation to the current consumption, in Campus A.C. Simões. In general, in spite of the low methane production, the reactors containing organic residues proved to be a good alternative for reducing COD and solids contents. Key