科研之友
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摘要
The inclusion of the use of seed-empty strobili for energy purposes in Araucaria angustifolia production chain, in Santa Catarina, can increase income in family agriculture, helping to improve the quality of life of farmers. Thus, the objective of this study was to determine the energy quality of these failures in nature and briquettes produced from their wastes. Female strobili with seed-set failures were used from Araucaria angustifolia (Bert.) O. Ktze, collected in three municipalities in the southern mountain region of the state of Santa Catarina: Lages, Painel and Sao Jose do Cerrito. The physical, energy, chemical and particle size of those failed strobili were determined. After production of briquettes in a pilot briquetteer, the physical and energetic properties were also determined in briquettes. Moisture content on wet base was high for failures in nature (61%), preventing its energy use without prior treatment, and low in the briquettes (9.91%). The extractives in hot water (9.84%); toluene alcohol (13.18%) and lignin (47.76%) were high, making the materials suitable for production of high quality compressed briquettes. The energy quality of seed devoid strobili (failures) is different from wood (average values of timber species groups of Gymnosperms and Angiosperms) and similar to sugar cane bagasse and cotton branches. The fixed carbon content (22.44%) and ash (4.26%) for the failures were higher than for the wood and the gross calorific value (4208 kcal. kg(-1) for failure and 4443 kcal. kg(-1) for the briquettes) was lower than that for wood. The apparent density of the briquettes was 1146 kg. m(-3). No grinding of failures for the production of high quality briquettes is required. The production of briquettes from failed seed-set strobili can be a viable alternative use of waste of strobili production chain, generating income for small farmers.
- 出版日期2016-12
