The chemical composition of exhausted coffee waste
dc.contributor.author
dc.date.accessioned
2016-01-25T12:38:05Z
dc.date.available
2016-01-25T12:38:05Z
dc.date.issued
2013
dc.identifier.issn
0926-6690
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dc.description.abstract
The chemical composition of exhausted coffee waste generated in a soluble coffee industry was investigated. The chemical characterization included elemental analysis, mineral composition and ash content, summative composition; acidic functional groups, lipophilic extractives, total polyphenols, condensed tannins determination and FTIR analysis. The spent coffee samples showed high carbon (>58%), low nitrogen (<2%), and low ash (<1%) contents and low polarity coefficient (O. +. N)/C (<0.5). The summative composition reveals that extractives are the main components of exhausted coffee wastes (54%). This percentage includes lipophilic fractions (24%), ethanol and water soluble compounds (5%), and compounds solubilized in 1% NaOH (26%). Lignin and polysaccharides were found in a similar proportion between 20 and 26%. The GC analysis of monosaccharide showed about 60% glucose and 40% mannose. The main components in the lipophilic extractives are free fatty acids (>60%) of which more than 30% was identified to be n-hexadecanoic acid. Total polyphenols and tannins represent <6% and <4% of the exhausted coffee wastes, respectively. Assignments of the bands of the obtained FTIR spectra confirm the presence of lipids, polysaccharides and chlorogenic acid. Exhausted coffee wastes showed characteristics for various potential applications such as biodiesel production, as a source of antioxidants and as a biosorbent of hydrophobic pollutants
dc.description.sponsorship
This research was funded by the Spanish Ministry of Science and Innovation as part of the projects CTM2010-15185 and CTM2008-06776-C02-01. D. Pujol was financially supported by "Ministerio de Educacion, Cultura y Deporte" (MHE2011-00258) and a fellowship by "Universitat de Girona" (BR 10/09). A PhD fellowship from Chinese Scholarship Council [2011] 3005 was attributed to C. Liu. We thank Dr. Isabel Miranda for chemical methods and Joaquina Martins for laboratorial assistance
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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info:eu-repo/grantAgreement/MICINN//CTM2010-15185/ES/INVESTIGACION DEL PAPEL DE LOS BIOPOLIMEROS EN LA SORCION DE CONTAMINANTES ORGANICOS. ESTUDIO DEL CORCHO COMO NUEVO BIOSORBENTE./
info:eu-repo/grantAgreement/MICINN//CTM2008-06776-C02-01/ES/UTILIZACION DE RESIDUOS INDUSTRIALES PARA LA DEPURACION DE EFLUENTES CONTAMINADOS CON METALES PESADOS/
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Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.indcrop.2013.07.056
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© Industrial Crops and Products, 2013, vol. 50, p. 423-429
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Articles publicats (D-Q)
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Tots els drets reservats
dc.subject
dc.title
The chemical composition of exhausted coffee waste
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
018068
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dc.relation.ProjectAcronym