Relux Umwelt, with its investments in the DEUSA International subsidiary NDHE and Menteroda Recycling, is taking over the re-cultivation of existing waste dumps created by salt mining at the Bleicherode and Menteroda mines. Authorised soil and specific mineral waste are accepted for recovery there.

The objectives of stockpile re-cultivation are to reduce the salt load in groundwater and to improve the landscape by re-cultivating the dump, which is hostile to plants. Re-cultivation at the Bleicherode and Menteroda sites began in 1991 after production of potash fertilizer was discontinued.

Rain water is kept away from the water-soluble salt layer through innovative methods such as the incorporation of substrate mixtures from both organic and mineral waste and the creation of salt solution is minimised. Each of the dump sites guarantee an acceptance capacity of more than 300,000 tons per year. The high acceptance capacity ensures the necessary safety of recycled waste. The salt input into the groundwater was reduced by at least 95% after the re-cultivation measures were completed.