This is followed by adding a copper-containing solid matter into the leach residue and conducting the leach residue to pressure leaching.

The leachate is removed from the leachate and concentrated.

The hardened product also has acceptable leachate concentrations.

The generation of leachate from the filled up wet waste can be prevented using simple method.

The invention relates to soil washing using acidogenic leachate.

Leachate delivery is controlled in accordance with the values obtained.

The leachate is recovered for further processing to remove the metal value.

The ammonia stripper 32 has a leachate inlet 56 connected to a leachate flow path, and an ammonia containing gas outlet 36, at an upper end thereof.

Injection wells (24) allow leachate to be reintroduced into the landfill (10).

In the step of purifying the leachate, the leachate is neutralized by the addition of lime to precipitate and remove impurity metals, such as selenium, tellurium, bismuth, and copper.

A method and a device for cleaning leachate, the leachate after a collecting stage being conducted to several treatment stage, whereupon the leachate is led to a wetland system.

These authors indicate that if uncontrolled leachate migration is unacceptable, the leachate should be collected and treated as a liquid waste.

A pump (54) allows leachate to be drawn from the waste material (46), through the extraction well (38).

A leachate discharge outlet 72 is provided which is connected to a leachate discharge flow path 74, and a steam inlet 70 is provided which is connected to the boiler 26 by a conduit.

With APATEQ’s “LeachPaq”, the leachate is treated directly on site.