BIOMASS TECHNOLOGY PRODUCTION FROM AGRO-PROCESSING WASTES BY AN EXPELLER MACHINE | ||
| Misr Journal of Agricultural Engineering | ||
| Article 15, Volume 30, Issue 2, April 2013, Pages 537-558 PDF (703.35 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/mjae.2013.102075 | ||
| Author | ||
| Mohamed I. Shoughy | ||
| Agric. Eng. Res. Ins. (AEnRI), Dokki, Giza, Egypt. | ||
| Abstract | ||
| An extruder was developed and tested for forming biomass from agro-processing wastes. The experimental treatments included four screw speeds (0.789, 1.05, 1.41and 1.57m/s.), four die hole diameters of extruder (6, 8, 10 and 12mm) and three moisture levels (7.5, 10.5 and 13.6%) of two agro-processing wastes at different particle size (sawmill dust (≤ 3mm) and coarser corncob grinds (≤6.5mm). The results of the experiments showed that the particle size had a significant effect on machine productivity, pellets density, durability and specific energy requirement. The finer sawdust resulted in higher productivity, pellets density, durability and lower specific energy than the coarser corncob grinds. The machine productivity of sawdust was higher value by about 7% than the productivity of corncobs. The pellets density ranged from 0.81 to 1.24g/cm3 for sawdust and form 0.76 to 0.94g/cm3 for corncobs. The durability of sawdust pellets was higher by about 15.6% for corncobs pellets. While, the energy requirement of sawdust pellets was lower value by about 41.7% than for corncobs pellets. The pellets produced on the smallest die and lower moisture content had the best quality values. The combustion test indicated that the combustion of the pellets is more regular than the combustion of loose materials and provided the highest flue gas temperature and low carbon monoxide contents emitted. | ||
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