Leachate from landfills

Landfill leachate is one of the most difficult slurries to treat. It is a liquid waste that is generated mainly by the infiltration of rainwater into the waste mass, or by the decomposition of the waste. Leachate produced by municipal solid waste landfills is a wastewater with a more or less high concentration of organic and inorganic pollutants resulting from the biological and physicochemical processes that take place within the landfills.

Problem:

The characteristics of the effluent depend on factors such as the moisture and age of the landfill, the production and consumption of water during biodegradation of the waste, and the biodegradable organic composition of which the waste is made.

Typically, the water to be treated consists mainly of dissolved salts, organic compounds, and ammonia.

Solution:

Vacuum evaporation, in combination with other technologies such as reverse osmosis, succeeds in recovering much of the leachate even drawing value from it.

Advantages:

→ The semi-solid fraction obtained can be inerted and returned to landfill
→ The liquid fraction can be reused for irrigation.
→ The liquid fraction can be discharged into the sewer system or surface water, depending on the degree of purification
→ Cost reduction

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