The effects of different storage methods on drying and
quality control of logging residue from final fellings
were studied. The research concentrated on the fore-part
of energy wood procurement chain - the storage of the
residues on a clear-cut area in harvester made heaps and
on roadside landings in large piles. The storage of both
fresh and dry logging residues were studied. The
objective was to study the storage logistics, by which it
is possible to reduce the moisture content of the logging
residues below 40%, and to maintain the quality gained
during the storage.
Drying of logging residue on the clear-cut area in
harvester made heaps has clear advantages: material will
dry effectively and the nutrient-rich needles will
largely fall off and be retained on the site. The optimum
length of a drying period on the clear-cut area is 1-3
weeks depending on the weather conditions. Moisture
content of stored material will decrease down to 25-30%.
After drying the material should be transported to
roaside as soon as possible for storage in large piles.
If logging is carried out in winter time and if the goal
is not to dry logging residue over the next summer, it
should be transported from the logging site to the
roadside storage immediatelly after roundwood logging.
When logging residues are stored in piles at the roadside
the result can be improved by covering the piles. This
will result in a decrease moisture content by 10-15%
lower moisture content in comparison with the uncovered
The transportation of elements from needles to branch
wood was not observed during one summer's drying period
on the clear-cut area. However, because of the
considerable decrease in the needle mass during storage,
the chlorine content was also cut in half. Both heavy
metal and ash contents of logging residues were very low.
Also neither the storage area nor the storage method
seems to have significant effect of the concentrations.
The amount of microbes, mostly fungi, occurring in the
chips was so high that it has to be taken into account
when evaluating possible health risks among people
handling the material. During the chipping of logging
residues it is advisable to use class P3 respirator.
|Translated title of the contribution||Quality management of logging residue|
|Title of host publication||Puuenergian teknologiaohjelman vuosikirja 2001|
|Subtitle of host publication||Puuenergian teknologiaohjelman vuosiseminaari|
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Publication status||Published - 2001|
|MoE publication type||B3 Non-refereed article in conference proceedings|
|Event||Puuenergian teknologiaohjelman vuosiseminaari - Jyväskylä, Finland|
Duration: 5 Sep 2001 → 6 Sep 2001
|Seminar||Puuenergian teknologiaohjelman vuosiseminaari|
|Period||5/09/01 → 6/09/01|