Leachate

Seepage water is underground water that is under the influence of gravity is moved downward ( seepage ). It crosses all the water conducting soil and rock layers until it hits a water-bearing layer. Does leachate on a waterproof bottom layer, the layers of water forms (also called " floating water"; above the ground water via a water-bearing layer of water located ).

In environmental science, the term leachate ( SiWa ) is used for infiltrating precipitation in landfills ( see there). According to the Federal Soil Protection and Contaminated Sites Ordinance ( BBodSchV ) has to be made for identified soil contamination in the assessment of possible hazards to groundwater via leachate ( leachate forecast). Since 1985, for clamping at landfills and surface drainage prior art. The leachate was previously cleaned in sewage treatment plants. Today, there are a variety of purification methods. The optimal, but also elaborate and expensive cleaning of leachate is the two-stage reverse osmosis. Are less expensive biological treatment and pollutant removal by adsorption on activated carbon.