A sanitary landfill is a controlled waste deposit. It allows the reduction of the effects produced by the degradation of the fraction of organic matter. Normally, waste layers are built in previously water proof / lined areas. These areas must be degasified through the installation of wells and pipes to carry out the generated biogas. The waste is covered with a layer of earth at least once a day. Once an area is filled out, it is closed and a final cover layer is applied. The waste decomposition sub-products are managed on facilities closed to the landfill, they are percolated liquids and biogas.

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