Procesos de generación de calor en torno a un vertedero clausurado: causas del fenómeno y posibles consecuencias para su gestión y seguridad

• Autores: Catherine Fischer, Mauro Gandolla, Michel Aragno
• Localización: Residuos: Revista técnica, ISSN 1131-9526, Año nº 6, Nº 30, 1996, págs. 30-38
• Idioma: español
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• Resumen

  • Abnormally high soil temperatures (up to 60°C) have sometimes been linked to the presence of methane in the cover soil of landfills. However, very little is known about their origin: chemical reactions and underground fires have been suggested as possible causes. For a correct management of the landfill, it is important to understand what causes this overheating. If it occurs near the edge of the landfill, it may damage the synthetic or mineral liner, as they are not designed to withstand such high temperatures. This may facilitate the migration of gas leachate into the environment. We present here a pluri-disciplinary study of high temperature zones discovered on and near two sanitary landfills in Switzerland. On-site gas and temperature measurements, a survey by radio-magnetotelluric resistivity and the designing and study of a bench-scale model were used to elucidate the processes and organisms involved in this heat-generation.