Primernost ostankov mlete kave za proizvodnjo peletov

Gornik Bučar, Dominika (author), Prislan, Peter (author), Verhovšek, Dejan (author), Gospodarič, Bojan (author)

Za doseganje cilja evropske energetsko-podnebne politike, da do leta 2050 dosežemo podnebno nevtralnost s prehodom na obnovljive vire energije, je potrebno aktivirati različne razpoložljive obnovljive vire, vključno z biološkimi ostanki oz. odpadki. Eden od takih bioloških odpadkov, ki nastaja v velikih količinah in se večinoma nepredelan odlaga v okolje, so ostanki mlete kave. Ker ostanke mlete kave sestavljajo celuloza, hemiceluloza, lignin in proteini, predstavljajo velik potencial tudi kot biogorivo, ki lahko delno nadomesti lesno biomaso pri proizvodnji peletov. V raziskavi smo v laboratorijskih pogojih izdelali pelete iz ostankov mlete kave, ki smo jim dodali različne deleže (0 %, 25 %, 50 %, 75 %) žagovine. Izdelanim peletom smo določili lastnosti in jih glede na izmerjene vrednosti razvrstili v kakovostne razrede po standardu SIST EN ISO 17225-6:2021. Ugotovili smo, da imajo peleti z večjim deležem ostankov mlete kave višjo kurilno vrednost, večjo vsebnost pepela ter nižjo mehansko obstojnost. Peleti, izdelani iz ostankov mlete kave in dodatkom žagovine (50 % ali več), izkazujejo obetavne lastnosti kot vhodna surovina za proizvodnjo peletov.

• Language: Slovenian
• Keywords: peleti, ostanki mlete kave, žagovina, biološki odpadki, kurilna vrednost, kakovost peletov
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: str. 69-80
• Numbering: ǂLet. ǂ73, ǂšt. ǂ1
• PID: 20.500.12556/RUL-167262
• UDC: 630*839.81:663.938.4
• ISSN on article: 2590-9932
• DOI: 10.26614/les-wood.2024.v73n01a06
• COBISS.SI-ID: 200904451
• Publication date in RUL: 12.02.2025

GORNIK BUČAR, Dominika, PRISLAN, Peter, VERHOVŠEK, Dejan and GOSPODARIČ, Bojan, 2024, Primernost ostankov mlete kave za proizvodnjo peletov. Les [online]. 2024. Vol. 73, no. 1, p. 69–80. [Accessed 24 April 2025]. DOI 10.26614/les-wood.2024.v73n01a06. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=167262

Record is a part of a journal

• Title: Les
• Publisher: Biotehniška fakulteta, Oddelek za lesarstvo, Biotehniška fakulteta, Oddelek za lesarstvo, Založba Univerze
• ISSN: 2590-9932
• COBISS.SI-ID: 290940672

Licences

• License: CC BY-SA 4.0, Creative Commons Attribution-ShareAlike 4.0 International
• Link: http://creativecommons.org/licenses/by-sa/4.0/
• Description: This Creative Commons license is very similar to the regular Attribution license, but requires the release of all derivative works under this same license.

Secondary language

• Language: English
• Title: Suitability of spent ground coffee for pellet production

Abstract

In order to achieve the European energy and climate policy goal of climate neutrality by 2050, it is necessary to activate various available renewable energy sources, including biological residues or waste. One such biological waste, which is produced in large quantities and usually enters the environment unprocessed, is spent ground coffee. As spent ground coffee consist of cellulose, hemicellulose, lignin and proteins, it has great potential as a biofuel, and could partially replace wood biomass in the production of pellets. In our research, we have produced pellets under laboratory conditions from spent ground coffee to which we have added different proportions (0%, 25%, 50%, 75%) of sawdust. We determined the properties of the pellets and categorized them into quality classes based on the measured values according to the SIST EN ISO 17225-6:2021 standard. We found that pellets with a higher proportion of spent ground coffee residues have a higher calorific value, higher ash content and lower mechanical durability. Pellets made from spent ground coffee residues with the addition of sawdust (50% or more) show promising properties for use as a raw material for pellet production.

• Keywords: pellets, spent coffee grounds, sawdust, bio waste, calorific value, pellets quality