Avaliação sensorial e química de café natural com inoculação e controle de secagem
Data
2022-07-28
Autores
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Editor
Universidade Federal de Lavras
Resumo
O Brasil é o maior produtor de café arábica do mundo, e o mercado de cafés especiais também tem ganhado importância. Em média, esses cafés são comercializados com ágio de 27,1%. Para ser considerado especial. o café deve expressar um potencial elevado de aroma e sabor, além de uma qualidade intrínseca que é proveniente da interação entre genótipo, ambiente e processamento. Desta forma, o objetivo deste trabalho foi avaliar a qualidade de grãos de café natural com e sem inoculação de leveduras com tempos de fermentação diferentes e a cinética de secagem de dois métodos: secagem contínua e secagem intermitente. O método de secagem, após a fermentação, afeta a qualidade de bebida do café, visto que a qualidade do café fermentado e seco, via secagem intermitente, foi superior com o tempo efetivo de secagem inferior. A fermentação combinada com a secagem contínua intensifica atributos negativos da bebida do café. A fermentação mais prolongada contribuiu, para aumentar os conteúdos dos ácidos succínico e acético, na redução da concentração de açúcares e maior concentração de ácidos graxos linolênico, behemico, esteárico, araquidico e oleico. Para o café natural, nas secagens contínua e intermitente, os modelos matemáticos que melhor descrevem os dados experimentais de teor de água de equilíbrio foram os modelos de Dois Termos e Henderson & Pabis modificado.
Brazil is the largest producer of Arabica coffee in the world and the specialty coffee market has also gained importance, on average these coffees are traded at a premium of 27.1%. To be considered special, coffee must express a high potential for aroma and flavor, in addition to an intrinsic quality, and this quality comes from the interaction between genotype, environment and processing. Thus, the objective of this work was to evaluate the quality of natural coffee beans with and without yeast inoculation with different fermentation times and the drying kinetics of two methods: continuous and intermittent drying. The drying method, after fermentation, affects the quality of the coffee beverage, and the quality of the fermented and dried coffee via intermittent drying was higher with the lower effective drying time. Fermentation combined with continuous drying intensifies negative attributes of the coffee beverage. The longer fermentation contributed to increase the contents of succinic and acetic acids, reducing the concentration of sugars and higher concentration of linolenic, behemic, stearic, arachidic and oleic acids. For natural coffee in continuous and intermittent drying, the mathematical models that best describe the experimental data of equilibrium water content were the two-term and modified Henderson & Pabis models.
Brazil is the largest producer of Arabica coffee in the world and the specialty coffee market has also gained importance, on average these coffees are traded at a premium of 27.1%. To be considered special, coffee must express a high potential for aroma and flavor, in addition to an intrinsic quality, and this quality comes from the interaction between genotype, environment and processing. Thus, the objective of this work was to evaluate the quality of natural coffee beans with and without yeast inoculation with different fermentation times and the drying kinetics of two methods: continuous and intermittent drying. The drying method, after fermentation, affects the quality of the coffee beverage, and the quality of the fermented and dried coffee via intermittent drying was higher with the lower effective drying time. Fermentation combined with continuous drying intensifies negative attributes of the coffee beverage. The longer fermentation contributed to increase the contents of succinic and acetic acids, reducing the concentration of sugars and higher concentration of linolenic, behemic, stearic, arachidic and oleic acids. For natural coffee in continuous and intermittent drying, the mathematical models that best describe the experimental data of equilibrium water content were the two-term and modified Henderson & Pabis models.
Descrição
Dissertação de Mestrado defendida na Universidade Federal de Lavras
Palavras-chave
Café, Fermentação, Culturas iniciadoras, Secagem intermitente, Coffea arabica L., Fermentation, Starter cultures, Intermittent drying
Citação
PEREIRA, Vinicius Moribe. Avaliação sensorial e química de café natural com inoculação e controle de secagem. 2022. 76 p. Dissertação (Mestrado em Engenharia Agrícola) – Universidade Federal de Lavras, Lavras, 2022.