Uso da casca de coco verde como fonte energética em substituição a lenha em cerâmica vermelha

Abstract

The accumulation of coconut shells in inappropriate places in the urban area, besides causing a deleterious effect to the city's image, has caused a series of economic and environmental problems for the municipalities, since it affects the municipal services of collection, transportation and disposal of garbage, due to the large volume it occupies and the decomposition time that can reach 12 years. The search for energy alternatives, due to the availability of firewood, is becoming more and more necessary. In light of the above, the objective of this research was the use of energy sources (green coconut shell) in the replacement of firewood in red ceramics in the State of Paraíba. Residues of coconut husks (20, 30 and 40%), eucalyptus residues (20%) and sabiá residues (20%) were used in relation to the control wood obtained from the caatinga, which were burned in a Hoffman oven with a higher temperature (900oC). The samples of ash were analyzed for the presence of phosphorus (P2O5) calcium (CaO), magnesium (MgO), copper (total Cu), iron (total Fe), manganese (total Mn) and zinc (total Zn). As the different sources of residues used in Ceramic Good Product are used, the amount of CaO, MgO and Mn and Cu in the ashes resulting from the burning of these materials is increased. Regarding the consumption of firewood, it was verified that the treatment in which wood + 40% of coconut residue was used, resulted in a lower consumption of firewood, with a greater efficiency in the burning of the bricks, thus leading to lower environmental degradation, due to the lower use of firewood from the caatinga. According to the data obtained in the present study, it was verified that there is viability for the use of firewood mixed with the coconut residue (40%), for the ease of acquisition, and that the ashes obtained in the Cerâmica Good Product with addition of firewood + (40%) presented high levels of CaO and MgO with potential to be used in the correction and fertilization of acid soils