Slag heap restoration

Slag heaps which were created through salt mining in Bleic­herode and Menteroda are restored by Relux Umwelt through its sub­sidiaries NDH-E and Menteroda Rec­ycling.


The goal of slag heap restoration is to diminish the pol­lution of the ground water and to imp­rove the lands­cape by rec­ultivating the hos­tile environ­ment of slag heaps.
The restoration in Bleic­herode und Menteroda star­ted in 1991 sin­ce the stop of the produc­tion of potash fer­tilizer.

To prevent the for­mation saline solution rain­fall is preven­ted to reach the water soluble salt deposit by the use of innovative methods like the integ­ration of a subst­rate com­pound of organic and mineral waste. Both slag heaps ensure an intake capac­ity of more than 300,000 tons per year. The high intake capac­ity guaran­tees the rec­ycling of waste. After comp­leting the rec­ultivation the salt entry in the ground water is reduced by at least 95%.


The allowed types of waste used in slag heap restoration are found on the waste manage­ment com­pany cer­tif­icates for the loc­ations Menteroda and Bleic­herode.

Experts estimate that each year an area the size of the Lake Con­stan­ce is sealed air­tight by dif­ferent projects. Slag heap re­cul­ti­va­tion cont­ributes to the reduc­tion of ecological damage by creating new pieces of nature. Slag heap rec­ultivation is based on the scien­tific research in the pilot project “Develop­ment of re­cul­ti­va­tion proc­edures in potash slag heaps” per­formed by the German Federal Environ­men­tal Foun­dation in Osnabrück. The research proc­edures were developed under the guidan­ce of K-UTEC Son­der­hausen with par­tic­ipation of the Univer­sity of Göttin­gen, the Univer­sity of Kas­sel, the Claus­thal Univer­sity of Tech­nology, and Doz. Dr. Sch­aef of the Freiberg Univer­sity of Mining and Tech­nology.

Our subsidiaries in this sector:

NDH-Entsorgungsbetreibergesellschaft Bleicherode

Menteroda Recycling GmbH