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Bioresour Technol

Title:		Utilization of coffee by-products obtained from semi-washed process for production of value-added compounds
Author(s):		Bonilla-Hermosa VA; Duarte WF; Schwan RF;
Address:		"Department of Biology, Federal University of Lavras (UFLA), CP 3037 - Campus Universitario, CEP 37.200-000 Lavras, MG, Brazil. Department of Biology, Federal University of Lavras (UFLA), CP 3037 - Campus Universitario, CEP 37.200-000 Lavras, MG, Brazil. Electronic address: whasleyduarte@dbi.ufla.br"
Journal Title:		Bioresour Technol
Year:		2014
Volume:		20140520
Issue:
Page Number:		142 - 150
DOI:		10.1016/j.biortech.2014.05.031
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"The semi-dry processing of coffee generates significant amounts of coffee pulp and wastewater. This study evaluated the production of bioethanol and volatile compounds of eight yeast strains cultivated in a mixture of these residues. Hanseniaspora uvarum UFLA CAF76 showed the best fermentation performance; hence it was selected to evaluate different culture medium compositions and inoculum size. The best results were obtained with 12% w/v of coffee pulp, 1 g/L of yeast extract and 0.3 g/L of inoculum. Using these conditions, fermentation in 1 L of medium was carried out, achieving higher ethanol yield, productivity and efficiency with values of 0.48 g/g, 0.55 g/L h and 94.11% respectively. Twenty-one volatile compounds corresponding to higher alcohols, acetates, terpenes, aldehydes and volatile acids were identified by GC-FID. Such results indicate that coffee residues show an excellent potential as substrates for production of value-added compounds. H. uvarum demonstrated high fermentative capacity using these residues"
Keywords:		"*Biofuels *Bioreactors Chromatography, Gas Chromatography, High Pressure Liquid Coffee/*metabolism Ethanol/*metabolism Fermentation Principal Component Analysis Species Specificity Volatile Organic Compounds/*metabolism *Waste Products Yeasts/*metabolism;"
Notes:		"MedlineBonilla-Hermosa, Veronica Alejandra Duarte, Whasley Ferreira Schwan, Rosane Freitas eng Evaluation Study Research Support, Non-U.S. Gov't England 2014/06/08 Bioresour Technol. 2014 Aug; 166:142-50. doi: 10.1016/j.biortech.2014.05.031. Epub 2014 May 20"