Valorization of Bio-Briquette Fuel by Using Spent Coffee Ground as an External Additive

Anna Brunerová, Hynek Roubík, Milan Brožek, Agus Haryanto, Udin Hasanudin, Dewi Agustina Iryani and David Herák
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Anna Brunerová: Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic
Hynek Roubík: Department of Sustainable Technologies, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic
Milan Brožek: Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic
Agus Haryanto: Department of Agriculture Engineering, Faculty of Agriculture, University of Lampung, Jl. Sumantri Brojonegoro 1, Bandar Lampung 35145, Republic of Indonesia
Udin Hasanudin: Department of Agro-industrial Technology, Faculty of Agriculture, University of Lampung, Jl. Sumantri Brojonegoro 1, Bandar Lampung 35145, Republic of Indonesia
Dewi Agustina Iryani: Department of Chemical Engineering, Engineering Faculty, University of Lampung, Jl. Sumantri Brojonegoro 1, Bandar Lampung 35145, Republic of Indonesia
David Herák: Department of Mechanical Engineering, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic

Energies, 2019, vol. 13, issue 1, 1-15

Abstract: 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 ? (kg·m ?3 ) and mechanical durability DU (%) of bio-briquette samples from initial feedstock materials were following for sawdust: ? = 1026.39 kg·m ?3 , DU = 98.44% and shavings: ? = 1036.53 kg·m ?3 , DU = 96.70%. The level of such mechanical quality indicators changed after the addition of SCG. Specifically, SCG+sawdust mixtures achieved ? = 1077.49 kg·m ?3 and DU = 90.09%, while SCG + shavings mixtures achieved ? = 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.

Keywords: solid biofuel; waste management; Coffea spp.; waste biomass; calorific value; mechanical durability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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