DOI - Mendel University Press

DOI identifiers

DOI: 10.11118/978-80-7509-820-7-0022

A NEW TYPE OF RENEWABLE ENERGY SOURCE DERIVED FROM FORESTRY

Luboš STANĚK, Radomír ULRICH, Ladislav ZVĚŘINA

In forestry, dendromass for energy purposes can be obtained in the form of firewood. Alternatively, it can be sourced as so-called logging debris, which remains in the forest after logging trees, among other things, as stumps or roots. Stumps and roots are difficult to transport and contain a large proportion of soil and stones. One of the possible ways of stump extraction is with grubbing heads.
Therefore, a new prototype of a grubbing head has been developed and it will be used to obtain logging waste from forest clearance areas. The advantage of this grubbing head is that it is possible to move the stump after it has been torn out, so that the soil is separated from the stump. The surface is then adjusted and aligned with the head. With the help of the excavator boom, parts of the stump are stored in piles, from which they are transported to the dendromass storage. After reaching 30% moisture, they are pulverized into energy chips, which are then taken to an incinerator or power plant. The resulting wood chips have an optimal calorific value and are presented as a renewable energy source produced from logging debris.
After processing all the data, which are based on several field measurements undertaken, the average processing time of one stump was found to be three minutes. In one hour, an experienced operator is able to process up to 20 stumps on average.

Keywords: dendromass, grubbing head, logging debris, renewable energy source, woodchip

pages: 22-28, Published: 2021, online: 2021



References

  1. Alam A., KellomäkI S., Kilpeläinen A., Strandman H. 2013. Effects of stump extraction on the carbon sequestration in Norway spruce forest ecosystems under varying thinning regimes with implications for fossil fuel substitution. GCB Bioenergy, 5(4): 445-458. DOI:10.1111/gcbb.12010. Go to original source...
  2. Alam A., Kilpeläinen A., Kellomäki S. 2012. Impacts of initial stand density and thinning regimes on energy wood production and management-related CO2 emissions in boreal ecosystems. European Journal of Forest Research, 131(3): 655-667. DOI:10.1007/s10342-011-0539-8. Go to original source...
  3. Björheden R. 2006. Drivers behind the development of forest energy in Sweden. Biomass and Bioenergy, 30(4): 289-295. DOI:10.1016/j.biombioe.2005.07.005. Go to original source...
  4. Eriksson L. N., Gustavsson L. 2008. Biofuels from stumps and small roundwood - Costs and CO2 benefits. Biomass and Bioenergy, 32(10): 897-902. DOI:10.1016/j.biombioe.2008.01.017 Go to original source...
  5. Hakkila P. 1975. Bark percentage, basic density, and amount of acetone extractives in stump and root wood. Folia For. 224, 14 p.
  6. Hakkila P. 2004. Developing Technology for Large-Scale Production of Forest Chips. Wood Energy Technology Programme 1999-2003. Report.
  7. Hunter M. L. (Ed.). 1999. Maintaining biodiversity in forest ecosystems. Cambridge University Press. Go to original source...
  8. Lazdiņš A., Zimelis A. 2012. System analysis of productivity and cost of stump extraction for biofuel using MCR 500 excavat or head. Research for Rural Development, 62-86.
  9. Melin, Y., Petersson H., Egnell G. 2010. Assessing carbon balance trade-offs between bioenergy and carbon sequestration of stumps at varying time scales and harvest intensities. Forest Ecology and Management, 260(4): 536-542. DOI:10.1016/j.foreco.2010.05.009 Go to original source...
  10. Neruda J. et al. 2015. Technika a technologie v lesnictví 2. Brno: Mendelova univerzita v Brně.
  11. Pastorek Z., Kára J., Jevič P. 2004. Biomasa: obnovitelný zdroj energie. Praha: FCC Public, pp. 286. ISBN 80-86534-06-5.
  12. Ranlund Å., Victorsson J. 2018. Stump extraction in the surrounding landscape: Predatory saproxylic beetles are more negatively affected than lower trophic levels. Forest Ecology and Management, (408), 78-86. DOI:10.1016/j.foreco.2017.10.030 Go to original source...
  13. Renshaw E., Comas C., Mateu J. 2009. Analysis of forest thinning strategies through the development of space-time growth-interaction simulation models, Stochastic Environmental Research and Risk Assessment, 23(3): 275-288. DOI:10.1007/s00477-008-0214-x Go to original source...
  14. Simanov V. 1993. Dříví jako energetická surovina: Možné způsoby energetického využívání těžebního odpadu a dalších opomíjených zdrojů dříví. Praha: Agrospoj. ISBN 80-7084-062-5.
  15. Simanov V. 2008. Výroba, zpracování a využití biomasy, Seminář k tématu výroba, zpracování a využití biomasy.
  16. Stupavský V., Wantulok M., Kratochvílová Z. 2008. Zpracování lesních těžebních zbytků. CZ Biom - České sdružení pro biomasu.
  17. TEKES. 2004. Increased use of forest fuels to expand the raw material base. Stumps - an unutilised reserve. TEKES.
  18. Victorsson J., Jonsell M. 2016. Overlooked subterranean saproxylic beetle diversity in clear-cut stumps and its implications for stump extraction. Forest Ecology and Management, 371: 59-66. DOI:10.1016/j.foreco.2016.01.037 Go to original source...
  19. von Hofsten H. 2006, Maskinell upptagning av stubbar - möjligheter och problem. Uppsala: SkogForsk.
  20. Ylitalo E. 2011. Metsätilastollinen vuosikirja 2011 [Finnish Statistical Yearbook of Forestry]. Finnish Forest Research Institute. (in Finnish with English summary). Helsinki: Vammalan Kirjapaino Oy. ISBN:978-951-40-2329-3.