Chemical characterization, hydrolysis and bioethanol production from municipal solid waste

• Autor(a) principal: Oliveira, Fabíola Ribeiro de
• Data de Publicação: 2022
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/216276
• topic: Biomassa; Biorrefinaria; Fermentação; Açúcares redutores; Hidrólise enzimática

Food waste is increasing in the world and this residue when inappropriately disposed, cause serious problems in the environment, due to its toxicity for soil and water. Then, new technologies for the use of municipal solid waste (MSW) can decrease its damage to nature and expenses for society, besides open up the opportunity to obtain value-added products.There is also a strong interest in the development of fuels from renewable sources, aiming at lower environmental impacts than the widely used fossil fuels. In view of this, biomass from MSW is known for its great potential as a source for biofuels and biomolecules production. Therefore, the present work aimed to produce ethanol from the organic portion of the MSW. The proposed technology conforms to the concept of biorefinery, and it consisted in the enzymatic hydrolysis using glucoamylases produced by Rhizopus oligosporus in solid-state cultivation, through technology patented by UNESP (BR 102014031591-8 A2), which showed a conversion capacity of starch to reducing sugars (RS) of 67.38%, followed by alcoholic fermentation by Saccharomyces cerevisiae, producing 0.25 g of ethanol per gram of reducing sugar offered. Therefore, it was found that use of this lower cost source of enzyme results in good hydrolysis yielding, and consequently, considerable bioethanol production from MSW.