Agricultural Engineering, Volume 48 (2016)


Algirdas Jasinskas, Dionizas Streikus, Vytautas Kučinskas, Kristina Vaitauskienė, Deniz Yilmaz, Imants Ziemelis
Aleksandras Stulginskis University; University of Suleyman Demirel Isparta; Latvia University of Agriculture


For research investigations were used the herbal unconventional energy plants – cup plant (Silphium perfolatium L.) and Virginia mallow (Sida hermaphrodita), which were grown in Lithuanian Research Centre for Agriculture and Forestry, and the knotweed (Reynoutria), which grew naturally in the forest glade. The productivity of these herbaceous plants are very high – 7-20 t ha-1 dry mass yield. Plants were cut by manual motorized chainsaw and chopped by drum chopper. Prepared chaff was milled by hummer mill and produced mill was granulated by small capacity granulator (250-300 kg ha-1). In presented work were determined investigated plant mill and pellet properties. After investigation of mill fractional composition was determined, that the smallest mill fraction was produced of milled knotweed plant stems: the biggest mill fraction accumulated on sieve with holes 0.25 mm diameter – 45.4 %, and dust – 46.7 %. The cup plants mill biggest fraction accumulated on sieve with holes 0.63 mm (37.6 %), Virginia mallows mill – on sieve with holes 0.5 mm (45.9 %). Also it was determined pellets quality parameters: humidity, density, ash content and calorific value. Determined biggest humidity was of knotweed – 22.3 %, it was too big, but produced knotweed pellets was sufficient hard and burning efficiency was a normal. The pellet density was significant high and ranged from 945.5 to 1072.3 kg m-3 dry matter (DM). The ash content of investigated plant pellets varied from 4.28 to 9.96 %, and was too high compared with wood. The average calorific value of investigated energy plants pellets varied from 16.8 to 17.7 MJ kg-1. Using laboratory equipment INSTRON 5960 were determined pellet disintegration force: the biggest force was for knotweed plant – 847 N, and about two times less for cup plant (463 N) and Virginia mallow (344 N). After analysis of test results it should be concluded, that knotweed pellets are sufficiently resistant to static force.

Keyword(s): biofuels, knotweed plant, Virginia mallow, cup plant, mill, pellets, properties, disintegration force


Aleksandras Stulginskis University. “Perennial grasses and unconventional herbaceous plants (Miscanthus, Virginia mallow, cup plants, reed grasses) and its compounds usage for pressed biofuel production”. Final report. Kaunas, 2014, 68 p.

T.Ivanova. Research of Energy Plants Processing to Solid Biofuels. Dissertation thesis. Czech University of Life Sciences Prague, 2012, 122 p.

Z.Strašil, J.Kara. Study of knotweed (Reynoutria) as possible phytomass resource for energy and industrial utilization. Research in Agriculture Engineering, 2010, Vol. 56 (3), p.p. 85–91.

F.Dzenajavičienė, N.Pedišius, R.Škėma. Sustainable bioenergy, LEI, Kaunas, 2011, 136 p.

Karpinskaitė, J. Decorative plants using for energy purposes vegetation and growth. Bachelor work, Šiauliai, 2010, 39 p.

M.Wrobel, J.Fraczek, S.Francik, Z.Slipek, M.Krzysztof. Influence of degree of fragmentation on chosen quality parameters of briquette made from biomass of cup plant Silphium perfoliatum L. In: 12th Engineering for Rural Development Proceedings, 2013, Latvia, 653.

G.Šiaudinis, A.Jasinskas, E.Šarauskis, D.Steponavičius, D.Karčiauskienė, J.Liaudanskienė. The assessment of Virginia mallow (Sida hermaphrodita Rusby) and cup plant (Silphium perfolatium L.) productivity, physico-mechanical properties and energy expences. Zemdirbyste-Agriculture, 2015, 93(1), 606–612p.

Resolution “Concerning National renewable energy resources development strategy confirmation”, No. 789. Vilnius, 2010.

J.Malatak, L.Passian. Heat-emission analysis of small combustion equipments for biomass. Research in Agriculture Engineering, 2011, 57(2), 37–50p.

DD CEN/TS 15149-1:2006. Solid biofuels – Methods for the determination of particle size distribution. Part 1: Oscillating screen method using sieve apertures of 3.15 mm and above. 2006.

Scholz, V., Lorbacher, R. F.  Spikermann, H. Stand der Pflanz – und Erntetechnik für Kurzumtriebsplantagen: Anbau und Nutzung von Bäuen auf landwirtschaftlichen Flächen 1. Fachtagung, Tharandt, 6. und 7. November, 2006. S. 149-156.

A.Jasinskas, R.Simonavičiūtė, G.Šiaudinis, L.Liaudanskienė, Š.Antanaitis, M.Arak, J.Olt. The assessment of common mugwort (Artemisia vulgaris L.) and cup plant (Silphium perfolatium L.) productivity and technhological preparation for solid biofuel. Zemdirbyste-Agriculture, 2014, 101(1), 19–26p.

Jasinskas, A., Šarauskis, E., Gutautaitė, A., Mašek, J. Assessment of herbal plant biofuel pellet quality indicators. Rural Development 2015: Towards the Transfer of Knowledge, Innovations and Social Progress: Proceedings of the 7th International Scientific Conference, 19–20th November, 2015, Aleksandras Stulginskis University, Lithuania, 1–6p.

BS EN 14918:2009. Solid biofuels. Determination of calorific value. 64p.

Full Text: PDF


  • There are currently no refbacks.

Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371

This journal is published under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License. Responsible editor: Dr A. Žunda.