Caracterização dos resíduos sólidos urbanos da cidade de Maceió-AL

Abstract

This work presents and argues the characterization of the urban solid residues generated in Maceió-AL, by means of laboratory and field assays, searching to contribute for operational improvements in the system of urban cleanness of the city. The residues had been collected monthly from routes previously defined, in the period of one year, in eight different quarters, representing each one of these an administrative region and existing partner-economic classroom in the city. In the total sixty and nine collections had been carried through, of March of 2006 the February of 2007. In the field assays, carried through in the landfill of Maceió, specific weight and gravimetrical composition had been evaluated the parameters; in the laboratory (LSA) of the Federal University of Alagoas had been carried through the following parameters physicist-chemistries: pH, solids (fixed, volatile and total) and text of humidity. The gotten data had demonstrated that the average gravimetrical composition of the solid residues is of 56,6% of organic substance, to 8.9% of paper/cardboard, 13.5% of plastic, 1.7% of metals, 1.3% of glasses, wooden 1.5% leather/rubber and 2.6% of rags and 13.8% of lands and similes. The composition average physicist-chemistry for the organic substance presented pH equal the 4,8, volatile humidity of 75,0%, solids equal 77.7%, and fixed solids of 22,3%. It is concluded that the urban solid residues of Maceió present of 56,6% of organic substance, with potential to be used in the compostagem, and 25,4% of material potentially you recycle, correspondents the paper/cardboard, plastics, metals and glasses, making possible the public power to implant a program of selective collection for recycling of these materials.