Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Storage of Whole-Tree Chips of Different Species and in Different Fractions
The purpose of this investigation was to study storage of whole-tree chips in piles, particularly the effect of different chip sizes and different tree species. Comparisons were also made with two piles of limbed material. Dry matter loss, moisture content, temperature, basic density and the amount of fungal particles were studied. The chip storage lasted from July 1982 until January 1983. Each of the eight piles contained 55 m exp 3 . Tarpaulin roofs were constructed over the piles. Decreasing chip size and/or the occurence of branch material resulted in increasing pile temperatures. All piles dried during storage. The poorest drying was registered in the pile with limbed spruce, from 48 percent m.c. (m.c. = moisture content, wet basis) to 42 percent m.c. The other piles dried from 40-50 percent m.c. to 25-33 percent m.c. Neither chip sizes nor species seem to have influenced drying to any great extent. The dry matter loss in the three piles with varying chip sizes were almost the same, appr. 8 percent. Pine had a higher dry matter loss, 11.6 percent, than did spruce, 9.4 percent, while birch had the lowest, 6.0 percent. However this might be misleading since many other authors have found that hardwood chips deteriorate quicker than softwood chips. The reason for the result of this investigation could be differences in m.c. at the beginning of storage. The dry matter loss in the piles with limbed material was lower than in the corresponding whole-tree piles. Chip size and tree species seem to have limited influence on the amount of fungal particles. (ERA citation 10:009695)
Storage of Whole-Tree Chips of Different Species and in Different Fractions
The purpose of this investigation was to study storage of whole-tree chips in piles, particularly the effect of different chip sizes and different tree species. Comparisons were also made with two piles of limbed material. Dry matter loss, moisture content, temperature, basic density and the amount of fungal particles were studied. The chip storage lasted from July 1982 until January 1983. Each of the eight piles contained 55 m exp 3 . Tarpaulin roofs were constructed over the piles. Decreasing chip size and/or the occurence of branch material resulted in increasing pile temperatures. All piles dried during storage. The poorest drying was registered in the pile with limbed spruce, from 48 percent m.c. (m.c. = moisture content, wet basis) to 42 percent m.c. The other piles dried from 40-50 percent m.c. to 25-33 percent m.c. Neither chip sizes nor species seem to have influenced drying to any great extent. The dry matter loss in the three piles with varying chip sizes were almost the same, appr. 8 percent. Pine had a higher dry matter loss, 11.6 percent, than did spruce, 9.4 percent, while birch had the lowest, 6.0 percent. However this might be misleading since many other authors have found that hardwood chips deteriorate quicker than softwood chips. The reason for the result of this investigation could be differences in m.c. at the beginning of storage. The dry matter loss in the piles with limbed material was lower than in the corresponding whole-tree piles. Chip size and tree species seem to have limited influence on the amount of fungal particles. (ERA citation 10:009695)
Storage of Whole-Tree Chips of Different Species and in Different Fractions
L. Bjoerklund (Autor:in)
1983
59 pages
Report
Keine Angabe
Englisch
Wood & Paper Products , Forestry , Fuels , Trees , Drying , Fungi , Moisture , Residues , Size , Storage , Wood Fuels , Foreign technology , ERDA/140504. Wood
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