Extração e caracterização da composição lipídica da borra de café e o estudo do potencial aproveitamento deste resíduo

• Ano de defesa: 2016
• Autor(a) principal: Moura, Cleber Luiz de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Tecnológica Federal do Paraná; Londrina; Brasil; Programa de Pós-Graduação em Tecnologia de Alimentos; UTFPR
• Palavras-chave em Português: Resíduos industriais; Borra de café; Extração (Química); Lipídios; Factory and trade waste; Coffee grounds; Extraction (Chemistry); Lipids; CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS; Tecnologia de Alimentos
• Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/2151

The coffee grounds generated in large quantities in the production of instant coffee, has become a problem because it is an industrial waste. For the present a lipid content of about 20%, is the extraction of this oil for varied purposes. This study aimed to extract and characterize the lipid fraction of Robusta coffee grounds and Arabica for two extraction processes: extraction Soxtec as solvent petroleum ether, and pressurized by using ethanol as a solvent. It carried out the transesterification of oils from the coffee grounds through acidic and basic, for further characterization of the lipid profile of the oil sludge using gas chromatography-mass spectrometry (GC- MS). The hot extraction yields were on average 19.18% and 22.16% for Robusta and Arabica quality, respectively, whereas the yield obtained by the pressure was 18.1% Robusta quality. The transesterification via acid catalysis was more efficient in conversion of triagliceróis esters, as in base catalysis favors a saponification reaction because high free fatty acids content. The majority were identified as methyl palmitate around 30% Methyl linoleate and around 40% in about two species.