33results about How to "Natural tolerance" patented technology

The invention provides a Cr (VI) heavy polluted soil in-situ restoration method. According to the method, firstly, a chemical reduction agent is injected into soil in situ; high-concentration Cr (VI) is subjected to primary reduction, so that the high-concentration hexavalent Cr cannot generate a toxic effect on the subsequent microorganism ecologic microbial inoculum; then, biogas residue, a carbon source and sulphate are prepared into the ecologic microbial inoculum to be injected into the Cr-containing soil in situ in a pressurizing way; by adopting a special maintenance mode, a large-scale reduction buffer belt containing sulphate reduction bacteria and sulfides is formed in the underground soil of a site; and the Cr (VI) is continuously and effectively reduced. The method has the advantages that the hexavalent Cr can be effectively reduced, and meanwhile, the cost is reduced.

The present invention adopts a detoxification method of in-situ and ex-situ coupling of Hg in heavily polluted sites. Sludge, carbon sources and sulfates are prepared into medicaments and applied to Hg-containing soils, and then special construction and maintenance methods are adopted to make the reduction of ecological bacteria The agent gradually penetrates into the ground and restores the Hg in the deep polluted soil. This method can remediate Hg-containing sites with high pollution depth at low cost and high efficiency, and at the same time treat waste with waste, and treat sludge.