Lixiviates treatment plant

Lixiviates treatment plant

The lixiviate depuration is performed in the biological reactors by means of microorganisms. This allows the eliminations of the ammoniac nitrogen (considered contaminating over 70 mg/l of water) by means of the continue recirculation of the lixiviates through nitrification and un-nitrification reactors.

  1. In the nitrification reactor, the organic and ammoniac nitrogen is oxidized and transformed by the action of aerobic bacteria, firstly in nitrites and secondly in nitrates. The oxygen supply in the reaction takes place injecting air in the form of very cold bubbles in the reactor base.
  2. In the un-nitrification reactor, the non oxide reactions take place (without oxygen), in which the nitrites and nitrates are transformed into molecular oxygen, that is liberated as an inert gas into the atmosphere. The reaction uses the same carbonic matter contained in the liquid, and if it is not enough, it gets support from an external supply of methanol.

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