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Título : Use of different extracts of coffee pulp for the production of bioethanol
Autor: Menezes, Evandro Galvão Tavares
Carmo, Juliana Ribeiro do
Menezes, Aline Galvão Tavares
Alves, José Guilherme Lembi Ferreira
Pimenta, Carlos José
Queiroz, Fabiana
Palavras-chave: Pulp coffee
Fermentable sugars
Ethanolic fermentation
Saccharomyces cerevisiae
Data da publicação: 28-Dez-2012
Referência: MENEZES, E. G. T. et al. Use of different extracts of coffee pulp for the production of bioethanol. Applied Biochemistry and Biotechnology, Clifton, v. 169, n. 2, p. 673-687, Jan. 2013.
Abstract: Coffee is one of the most important agricultural products in Brazil. More than 50 % of the coffee fruit is not used for the production of commercial green coffee and is therefore discarded, usually ending up in the environment. The goal of this work was to select an efficient process for obtaining coffee pulp extract and to evaluate the use of this extract in bioethanol production. The effects of heat treatment and trituration on the yield and composition of the extract were investigated by measuring the amounts of reducing sugars, starch, pectin, and phenolic compounds. The extraction process was most efficient at room temperature using grinding followed by pressing. Five different fermentation media were tested: sugarcane juice or molasses diluted with water or with coffee pulp extract and a medium with only coffee pulp extract. Batch fermentations were carried out at 30 °C for 24 h, and samples were taken to obtain measurements of the total reducing sugars, cell count, and ethanol concentration. The addition of coffee pulp extract did not influence the fermentation or yeast viability, and it can thus be mixed with sugarcane juice or molasses for the production of bioethanol, with a yield of approximately 70 g/L.
Idioma: en
Aparece nas coleções:DCA - Artigos publicados em periódicos

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