Lixiviates treatment plant
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The liquids generated in the decomposition process of the organic matter contained in the residues, together with the rain water filtered through the residues mass and that incorporates organic and inorganic compounds for dissolution or drag along, receive the name of lixiviates. In 2001, the lixiviates production in the Vall d'en Joan deposit was of almost 38,000 m3, and in the year 2002, of almost 51,000 m3. The lixiviates are gathered through a drainage process and directed by means of the gravity and of cambering towards a impermeable pond with capacity for 6,000 m3. Since the beginning of the controlled deposit until 1999, the collected lixiviated were transported in tank trucks to the external depurating installations. In 1999, the Barcelona City Hall started into function an innovating plant of lixiviate treatment for their in site treatment.
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