José Antonio Rodrigues de Souza

INFLUÊNCIA DA POPULAÇÃO FLUTUANTE NO PLANEJAMENTO DO SISTEMA DE LIMPEZA URBANA

Adequate management begins with determining the characteristics of the waste generated “in loco” in order to carry out effective planning, since literature data may not correspond to local reality. Thus, this work aimed to determine the quantitative and qualitative characteristics of solid waste produced in the city Urutai-GO, as well to study the effect of population seasonality and waste valuation. According to the results, during the IFGoiano Appropriate management begins with the determination of the characteristics of the generated waste “in loco” so that an effective planning can be carried out, since literature data may not correspond to the local reality. In this work, the objective was to determine the quantitative and qualitative characteristics of the solid waste produced in the city of Urutai-GO, as well as to study the effect of population seasonality and the evaluation of these residues. According to the results, it was verifed that solid waste, during the Campus Urutai IFGoiano school year, consists of 10.47% of plastics; 4.29% of metals; 4.13% of glasses; 13.17% papers and 61.11% discard material, with reductions of 34.99%; 55.35%; 39.39% 36.72% in the quantities of plastics, metals, glasses and paper, respectively, as well as an increase of 18.17% in the amount of discard material during the school holidays. The per capita generation, apparent specifc weight and volume generated monthly reduced from 0.75 kg hab-1 day-1, 17.60 kg m-3 and 144 m³, respectively, to 0.66 kg hab-1 day-1, 226,30 kg m-3 and 108 m³, respectively, during the school holidays. It was also verifed that the selective collection is a viable and self-sustaining alternative, being that its absence causes a waste of 3.4 minimum wages during the school year and of 1.6 minimum wages during the period of school vacations.

Parâmetros de transporte de metais pesados em resíduos sólidos urbanos

A alta toxicidade e o carater cumulativo dos metais pesados tem sido motivos de grande preocupacao mundial, proporcionando o aumento significativo de trabalhos que objetivem desenvolver tecnologias para remocao destas substâncias potencialmente nocivas ao meio ambiente. Objetivou-se estudar a influencia dos residuos solidos urbanos (RSU) nos parâmetros de transporte dos metais pesados contidos no percolado produzido por RSU_Fresco. Foram utilizados residuos solidos urbanos com 15 anos (RSU_Antigo) e 8 anos (RSU_Maduro) de aterramento e percolado com concentracao media de 0,146 mg L-1 de Cu, 0,046 mg L-1 de Cd, 17,2 mg L-1 de Zn e 0,135 mg L-1 de Pb e, 5 e 25 vezes esses valores. Os resultados possibilitaram concluir que para os residuos estudados (RSU_Antigo e RSU_Maduro) obteve-se fatores de retardamento na sequinte sequencia Pb>Cu>Zn>Cd, o RSU_Antigo apresentou maior capacidade de retencao dos metais.