Plateforme de connaissances sur l'agriculture familiale

Spent coffee grounds as an external additive for bio-briquette fuel

Coffee bio-briquettes

The present study investigates the quality changes of wood bio-briquette fuel after the addition of spent coffee ground (SCG) into the initial feedstock materials (sawdust, shavings) in different mass ratios (1:1, 1:3). Analysis of SCGs fuel parameter proved great potential for energy generation by a process of direct combustion. Namely, level of calorific value (GCV = 21.58 MJ∙kg−1), of ash content (Ac = 1.49%) and elementary composition (C = 55.49%, H = 7.07%, N = 2.38%, O = 33.41%) supports such statement. A comparison with results of initial feedstock materials exhibited better results of SCG in case of its calorific value and elementary composition. Bulk density ρ (kg·m−3) and mechanical durability DU (%) of bio-briquette samples from initial feedstock materials were following for sawdust: ρ = 1026.39 kg·m−3DU = 98.44% and shavings: ρ = 1036.53 kg·m−3DU = 96.70%. The level of such mechanical quality indicators changed after the addition of SCG. Specifically, SCG+sawdust mixtures achieved ρ = 1077.49 kg·m−3 and DU = 90.09%, while SCG + shavings mixtures achieved ρ = 899.44 kg·m−3 and DU = 46.50%. The addition of SCG increased wood bio-briquettes energy potential but decreased its mechanical quality. Consequently, the addition of SCG in wood bio-briquette has advantages, but its mass ratio plays an important key role.

Title of publication: Valorization of Bio-Briquette Fuel by Using Spent Coffee Ground as an External Additive
Volume: 13
Issue: 1
:
:
:
:
:
:
:
Auteur: Anna Brunerová
Autres autheurs: Hynek Roubík, Milan Brožek, Agus Haryanto, Udin Hasanudin, Dewi Agustina Iryani, David Herák
Organisation: Czech University of Life Sciences Prague
Autres organisations: Lampung University
Année: 2020
:
:
:
Type: Article de revue spécialisée
Texte intégral disponible à l'adresse: https://www.mdpi.com/1996-1073/13/1/54
Langue: English
:

Partagez