Leachate Treatment Methods | Landfill Leachate Information

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Leachate Treatment Methods

Leachate treatment methods fall into three categories, which are:
  1. Biological treatment methods (most common)
  2. Chemical Treatment methods (not commonly used, but sometimes useful in the short term and for one-off incidents)
  3. Physico-chemical methods (quite common)
  4. Filtration (increasingly common).

At any one landfill site these leachate treatment methods may be used individually or applied in combination.

Leachate Treatment Method

Examples of Biological treatment methods are aeration in the presence of a biologically activated sludge, and the sue of rotating biological contactors.

Leachate Treatment Method

An example of a chemical treatment method is the addition of potassium permangenate to leachate to reduce sulphur (bad egg) odor.

Leachate Treatment Method

An example of a physico-chemical treatment method is dosing the leachate with a coagulant and then allowing settlement to occur in a lagoon or settlement tank.

Filtration is used for leachate treatment in the form of different sieve (opening) size filters from the largest being micro-filtration, to ultra-filtration and nano-filtration in descending size order. Reverse Osmosis (RO) is the smallest sized particle filter and is capable of filtering the larger molecules, and is known as a molecular filter.

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