Metodologia para projeto básico de um aterro sanitário para município de médio porte

Abstract

The final disposal of urban solid waste (USW) in inappropriate locations, such as in controlled landfills and landfill, causes a number of damage to the environment and surroundings. The current waste disposal system of the city of Canindé – CE does not include sanitary landfill or an adequate system for disposal of its waste. In order to minimize the social, economic and environmental damage caused by the incorrect disposal of solid waste, being in accordance with Law 12.305/2010 establishing the National Solid Waste Policy (NSWP), this research established a basic landfill project for implementation in the municipality of Canindé. Throughout this study, the main aspects for the development of sanitary landfill were specified such as: recognition of favorable areas for deployment, construction, operation, dimensioning and stability of the landfills. The landfill was dimensioned with the capacity to contain about 440 thousand m3 of compacted and covered waste and allocated into two total cells whose largest dimensions are 480m x 240m x 2,3 m. It has the fish spine drainage system coupled to a packing lagoon of the effluent capable of storing the effluent for 7 days until its treatment and final disposal. Through Rocscience’s Slide 6.0 computer program, four conditions were simulated under which the geomechanical stability of the waste mass and the landfills of the landfill will be subjected throughout its operation and after its closure. All situations presented a safety factor coefficient above the considered minimum for the rupture of the fence, i.e. with minimal chances of possible failures in the structure. The work also proposed a basic technical monitoring plan for the 20 years of operation and forecast of activities after the closure of the wastewater disposal time. Throughout, in accordance with the objective laid down in the NSWP, the environmentally adequate final disposal of waste, this research brings a proposal for a sanitary landfill dimensioned according to the regulatory standards in force, the NBR 13896/97, NBR 8419/92, and NBR 15879/2010, applied to a medium-sized municipality, with a population of less than 100 thousand inhabitants, a solution for disposing of waste with minimal chances of causing environmental impacts and that still opening up space for the utilization of gases and treatment of effluent, that is, with minimum emissions to the environment.