Title:
Valorization of Spent Coffee Ground by Mixing with Residual Biomass for Pellet Production. Evaluation of Solid Fuel Properties at Different Mixtures
Author(s):
Kougioumtzis, M.A., Filippou, V., Rontogianni, A., Karampinis, E, Grammelis, P., Kakaras, E.
Document(s):
Paper
Poster
Abstract:
Everyday coffee is consumed globally. Spent coffee ground (SCG) is the residue obtained during the brewing process. SCG represent an abundant source of energy biomass, or raw material for added value products, still largely unexploited. Such residue can have several applications such as polymers/composites precursors, biofuels, biofertilizers etc. The aim of the present paper is the pilot production of pellets by mixing SCG and other residual biomass feedstocks. In this light, coffee residues were mixed at different ratios (0, 10, 30, 50, 70, 90 wt%) together with: i) forestry residues; ii) sawmill residues;iii) urban pruningsiv) maize residues; v) peach prunings; and vi) miscanthus. Continuously, samples of each fuel mixture were analysed at the Solid Fuels Laboratory of CPERI/CERTH in Greeceby applying established standards. The results of the analyses show that the mixing of biomass residues with coffee could result to competitive solid biofuels. More specifically, pellets with up to 10% coffee residues, mixed with sawmill residues, comply with the A2 limits set by ISO 17225-2 for wood pellets, while pellets withup to 30% coffee residues comply with the class B limits for wood pellets for commercial/residential applications. In the same light, urban prunings mixed with 10 wt% coffee residues are within the limits set for class B wood pellets.
Keywords:
solid biofuels, solid waste, mixed coffee pellets, solid fuels characterization, pilot production
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Biomass pretreatment for solid fuels and production of intermediates
Event:
31st European Biomass Conference and Exhibition
Session:
4DV.6.5
Pages:
785 - 793
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-4DV.6.5
Price:
FREE
