METHOD AND FACILITY FOR TREATING EFFLUENTS LOADED WITH ORGANIC MATERIAL, PARTICULARLY BY WET OXIDATION AND WITH INTERNAL SOLID RESIDUE RECYCLING, AND PURIFICATION FACILITY THEREFOR

摘要

An integrated method for purifying industrial and/or urban effluents containing a large amount of organic material in solution and/or suspension, wherein said effluents are treated in a wet oxidation reactor (10) in which said effluents are oxidised in the presence of at least one oxidising gas to mineralise a large part of the organic material therein by producing a gas phase (13) and an essentially liquid phase (12) mainly containing soluble residual organic material, as well as an essentially inorganic solid phase in suspension. Said essentially liquid phase from the reactor is subjected to liquid/solid separation to separate said solid phase, and at least a fraction of said separated solid phase (26) is recycled in said wet oxidation reactor. Various alternative embodiments of the method, in which a catalyst and/or an agent for acidifying the recycled solid phase fraction may be added, are provided. The facilities may operate continuously or semi-continuously.