Estudo da geração, transporte e avaliação geotécnica do sítio de disposição dos RSU do município de Rio Quente - GO

Abstract

This dissertation presents a study of the generation and transport of the USR - Urban Solid Residuals (Solid Wastes) in the municipal district of Rio Quente GO, as well a geotechnical suitability evaluation of the disposition area, with the aim to guide Public Government in solid waste management by means of an efficient project to dispose it and to reduce environmental impacts. The searched area is placed in the municipal district of Rio Quente, Estado de Goiás, in the Center-West Region of Brazil, with 4,84 hectare surface, where is inserted nowadays a landfill. During six month, it was investigated how many daily journeys were done, with seven weighing, by separating moist and dry solid waste driven to the landfill. It was done also a survey of solid waste previously selected by the enterprise Companhia Thermas do Rio Quente (CTRQ). The generated volume is about 5,632 ton/day, with a middle loose density of 112.52 kg/m3. From this amount, RQR selects 37% of the total mass. So, 63% of it is disposed in the current landfill area. The municipal district solid waste has from 67% to 75% of moist material in its composition. An average of 4.06 daily journeys are done, covering an average of 26.39 km/trip. The evaluation of the suitability of the solid waste deposition area took as a starting point the IBAM methodology (2001), concerning to selection of displacement solid waste areas. A number of 35 physical environment attributes were considered, related to relief, geology, climate, hydrology, underground water, main direction of the winds and others that were obtained by means of geotechnical search as well by field and laboratorial tests. Environmental restrictive applied criteria involve all of those specified by Agência Goiâna do Meio Ambiente (2007), as well five others suggested by IPT (1995, 2000) and fifteen proposed by Zuquette and Gandolfi (2004). Place suitability reached a level of 79 % of the ideal one. A sketch of a project to a sanitary landfill was proposed and it was calculated the useful life of the current landfill for five sceneries, by varying fix and variable population as well selectivity conditions. This useful life may range from six years and eleven months to sixteen years and seven months. Based on the results of this search, guidelines to solid waste management in the municipal district were developed, in order to minimize environmental impacts.