3309 KB0 KB199820242021Gornik Bučar, DominikaGospodarič, BojanKrajnc, NikePrislan, PeterSmolnikar, PavelStare, Darjaštevilka:1letnik:70str. 45-58ISSN:0024-1067DOI:10.26614/les-wood.2021.v70n01a04COBISSID_HOST:70829571URN:URN:NBN:SI:doc-0NF7OZCOenBiotehniška fakulteta, Oddelek za lesarstvoLes (Ljubljana)high-energy multiple impactkakovost peletovlesni ostankipeletiranjeresistance to impact millingstatic bendingthermal modificationtrdna biogorivatujerodne invazivne drevesne vrstewoodUsefulness of non-native invasive tree species wood residues for pellet production| Uporabnost lesnih ostankov tujerodnih invazivnih drevesnih vrst za proizvodnjo peletov|We produced pellets from five invasive non-native tree species growing in Slovenia on a laboratory pelleting device, namely: wild chestnut (Aesculus hippocastanum), boxelder maple (Acer negundo), black locust (Robinia pseudoacacia), thorny locust (Gleditsia triacanthos) and tree of heaven (Ailanthus altissima), as well as mixtures of the raw material from the above non-native invasive species and spruce (Picea abies) in the ratios 70:30 and 50:50. Under the same production conditions, we produced a total of 15 different types of pellets. The most important physical and mechanical properties (water content, bulk density, mechanical stability and ash content) were determined for the pellets produced. The results were compared with the limits defined in the international standard SIST EN ISO 17225-2:2014. The water content and bulk density of all produced pellet types met the requirements of the standard for the highest quality class A1. The mechanical durability of the pellets produced did not meet the requirements of the standard and did not exceed 96.5% (which is the limit value for quality class B). The results suggest that black locust, thorny locust and tree of heaven have the highest potential for further optimization of the pelleting processNa laboratorijski peletirni napravi smo izdelali pelete iz petih izbranih tujerodnih invazivnih drevesnih vrst, ki rastejo na območju Slovenije in sicer: divjega kostanja (Aesculus hippocastanum), amerikanskega javora (Acer negundo), robinije (Robinia pseudoacacia), trnate gledičevke (Gleditsia triacanthos) in velikega pajesena (Ailanthus altissima) ter mešanic surovine omenjenih tujerodnih invazivnih vrst s smrekovino (Picea abies) v razmerjih 70 : 30 in 50 : 50. Pod enakimi proizvodnimi pogoji smo skupno izdelali 15 različnih vrst peletov. Izdelanim peletom smo določili pomembnejše fizikalne in mehanske lastnosti (vsebnost vode, gostoto nasutja, mehansko obstojnost in vsebnnost pepela). Rezultate smo primerjali z mejnimi vrednostmi, opredeljenimi v standardu SIST EN ISO 17225-2:2014. Vsebnost vode in gostota nasutja vseh izdelanih vrst peletov sta zadostili zahtevam standarda za razvrstitev v najvišji kakovostni razred A1. Mehanske obstojnosti izdelanih peletov niso dosegale zahtev standarda in niso presegale 96,5%(kar je mejna vrednost za B razred). Rezultati kažejo, da imajo med izbranimi tujerodnimi invazivnimi drevesnimi vrstami največji potencial za nadaljnjo optimizacijo peletirnega postopka robinija, trnata gledičevka in visoki pajesen.Ključne besede: lesni ostanki, trdna biogoriva, tujerodne invazivne drevesne vrste, peletiranje, kakovost peletovTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaZveza lesarjev Slovenije