-The characterization of the residues was performed through the following analyses: elementary chemical composition (carbon, hydrogen, nitrogen, sulfur and oxygen) using the Elemental Analyzer Perkin Elmer, PE-2400, series II; immediate chemical analysis (volatile matter, fixed carbon and ash content), based on the Brazilian standard NBR 8112 [20]; calcium, magnesium, zinc, iron, manganese and cupper; bulk density according to the Brazilian standard NBR 6922 [21].