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INTERACTION OF PARTICLE SIZE, MOISTURE CONTENT AND COMPRESSION PRESSURE ON THE BULK DENSITY OF WOOD CHIP AND STRAW

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:   No Citation available.
Authors:   H Mozammel, S Shahab, B Tony, M Sudhagar, J Ladan, J Lim, M Afzal

Biomass material is highly heterogeneous in origin and form. Handling and storage of biomass materials are major hindrance of producing bio-based energy due to their high moisture content, low bulk densities and low heating values. In order to use biomass energy competitively with other fuels and to get the maximum possible energy output at a low cost, main target should be to carry the greatest possible amount of biomass material per load within legal restrictions. This study investigated the effect of particle size, vibration, moisture content and compression pressure on the bulk density of straws and wood chips. The bulk densities of small and large size wood chip varied from 180-314 and 158 to 308 kg/m3 respectively in the moisture content range of 10.7 to 55.71% (wet basis). The bulk density of straw varied from 24 to 54 kg/m3 depending on the particle size at 8.45% moisture content. Tapping increased about 20% of bulk density for wood chip and 32 to 43% for straw depending on the particle size. Compaction increased the bulk density of straw from 24 to 260 kg/m3 after applying pressure of 630 kPa. The bulk density of straw must be enhanced to meet the transportation criteria. Keywords: bulk density, straw, wood chips, compaction.

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