Análise comparativa entre poços de monitoramento e sistema duplo de coleta de percolados na detecção de vazamentos em aterros sanitários

Abstract

This research consists of comparing costs and preservation of the environment between two leachate leakage detection systems in landfills: 4 monitoring wells to collect and analyze samples of groundwater every three months and secondary leachate collection system. Three sanitary landfill sizes were used to compare costs. The results showed that the replacement of the current detection system using four monitoring wells is economically viable for secondary leachate collection system to landfills with an area equal or less than: 181,500 m² for compacted clay liner, 170,500 m² for geomembrane liner, 124,080 m² for composite liner (geomembrane/compacted clay liner). The secondary leachate collection system plus the installation of two monitoring wells to sample groundwater every 12 months is economically viable to landfills with area less or equal to 127,600 m² over the four monitoring wells system. The secondary leachate collection system in addition of being economically viable for medium and small landfills this system has the advantage of avoiding contamination of the groundwater and provides the continuous control of the leak in order to promote correction ready to liner system. The secondary leachate collection system in addition of being economically viable to medium and small landfills, this system has the advantage of avoiding contamination of the groundwater and avoid spending on fine and correction of the quality of the groundwater.