Loading patent…
AssigneesNkt A/S, Forskningscenter Riso
InventorsEmil Sorensen, Jorgen Jensen, Erik Rasmussen, Bror S. Jensen, Belinda Bjerre
Estimating the term…
A method for treating polluted material such as industrial waste water or polluted water from other sources, sewage or sewage sludge or other forms of sludge, or polluted soil, to degrade oxidizable substances therein, comprising subjecting the polluted material to a wet oxidation process in a reactor so as to decompose and/or modify oxidizable substances therein and optionally improve the filterability of solids when present in the material; the material may optionally be pretreated so as to facilitate the wet oxidation process. Solid polluted material is preferably in the form of a liquid suspension, such as an aqueous suspension, when subjected to wet oxidation. The wet oxidation process is performed to such an extent, optionally with subsequent substantial removal of heavy metals, that the decomposed and/or modified substances remaining after the wet oxidation and the optional removal of heavy metals are substantially biodegradable.
A method for treating polluted soil so as to decompose or modify oxidizable polluting substances therein, and improve the filterability of solids present therein, wherein the polluted soil is in the form of an aqueous suspension and is subjected to wet oxidation in a reactor, the wet oxidation being achieved by an oxidizing agent which is added to the aqueous suspension of the polluted soil in an amount which is at least sufficient to decompose or modify the oxidizable substances, the wet oxidation being performed to such an extent that the decomposed or modified substances remaining after the wet oxidation are substantially biodegradable.
A method for treating polluted soil so as the decompose or modify oxidizable polluting substances therein, and improve the filterability of solids present therein, wherein the polluted soil is in the form of an aqueous suspension and is subjected to wet oxidation in a tubular reactor through which said suspension flows with a substantially continuous turbulent flow, having a Reynolds number of at least 4,000, the wet oxidation being achieved by an oxidizing agent which is added to the aqueous suspension of the polluted soil in an amount which at least sufficient to decompose or modify the oxidizable substances, the wet oxidation being performed to such an extent that the decomposed or modified substances remaining after the wet oxidation are substantially biodegradable.
Dependencies are inferred from the claim text.