Valorization of spent coffee ground by mixing with various types of residual biomass for pellet production: evaluation of solid biofuel properties at different mixtures

Coffee consumption is a daily habit for the majority of people worldwide, resulting in consistently large amounts of residue. Spent coffee ground (SCG) is the residue obtained during the brewing process. It represents an abundant source of energy biomass, or raw material for added value products but...

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Vydáno v:Biofuels, bioproducts and biorefining Ročník 18; číslo 4; s. 968 - 989
Hlavní autoři: Kougioumtzis, Michael A., Filippou, Vasileios, Rontogianni, Anatoli, Karampinis, Emmanouil, Grammelis, Panagiotis, Kakaras, Emmanouel
Médium: Journal Article
Jazyk:angličtina
Vydáno: Chichester, UK John Wiley & Sons, Ltd 01.07.2024
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Témata:
Biodiesel fuels
Biofertilizers
Biofuels
Biomass
Biomass energy production
circular bio economy
Coffee
Crop residues
Energy resources
Energy sources
Fertilizers
Forest residues
Fuel mixtures
International standards
mixed coffee pellets
Pellets
pilot production
Polymers
Prepolymers
Raw materials
refined solid biofuels
Residues
Sawmills
Solid fuels
solid fuels characterization
solid waste
spent coffee grounds
Wood
ISSN:1932-104X, 1932-1031
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Shrnutí:Coffee consumption is a daily habit for the majority of people worldwide, resulting in consistently large amounts of residue. Spent coffee ground (SCG) is the residue obtained during the brewing process. It represents an abundant source of energy biomass, or raw material for added value products but it is still largely unexploited. This residue may find several applications, such as in polymers/composites precursors, solid/liquid biofuels, biofertilizers, and so forth. The aim of the present paper was the pilot production of pellets by mixing SCG and other residual biomass feedstock. Coffee residues were mixed at different ratios (0, 10, 30, 50, 70, 90 wt%) together with: (i) forestry residues; (ii) sawmill residues; (iii) urban prunings; (iv) maize residues; (v) peach prunings; and (vi) miscanthus. Samples of each fuel mixture were analyzed at the Solid Fuels Laboratory of CPERI/CERTH (Chemical Process and Energy Resources Institute/Centre for Research and Technology Hellas) in Greece by applying established standards. The results of the analyses show that the mixing of biomass residues with coffee could result in competitive solid biofuels. More specifically, pellets with up to 10% coffee residues, mixed with sawmill residues, complied with the class A2 limits set by the international standard ISO 17225‐2 for wood pellets, and pellets with up to 30% coffee residues complied with the class B limits for wood pellets for commercial/residential applications. Urban prunings mixed with 10 wt% coffee residues are within the limits set for class B wood pellets.
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ISSN:1932-104X
1932-1031
DOI:10.1002/bbb.2646