초록 ▼

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. The effluents are oxidized in the presence of at least one oxidizing gas to mineralize a la

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. The effluents are oxidized in the presence of at least one oxidizing gas to mineralize a large part of the organic material therein by producing a gas phase and an essentially liquid phase mainly containing soluble residual organic material, as well as an essentially inorganic solid phase in suspension. The essentially liquid phase from the reactor is subjected to liquid/solid separation to separate the solid phase, and at least a fraction of the separated solid phase is recycled in the wet oxidation reactor. Various alternative embodiments of the method include adding a catalyst and/or an agent for acidifying the recycled solid phase fraction. The facility may operate continuously or semi-continuously between interruptions.

대표청구항 ▼

[ We claim:] [1.] A method for the purification of industrial and/or urban effluents containing a substantial proportion of soluble organic matter and/or organic matter in suspension, comprising the acts of:treating said effluents in a wet air oxidation reactor within which said effluents are made t

[ We claim:] [1.] A method for the purification of industrial and/or urban effluents containing a substantial proportion of soluble organic matter and/or organic matter in suspension, comprising the acts of:treating said effluents in a wet air oxidation reactor within which said effluents are made to undergo an oxidation in the presence of at least one oxidizing gas so as to mineralize a major part of the organic matter contained in said effluents, the treating act producing, firstly, a gas phase and, secondly, an essentially liquid phase containing mainly soluble residual organic matter as well as an essentially mineral solid phase in suspension,separating the mineral solid phase in suspension from said essentially liquid phase resulting from the treating act to isolate said solid phase; andrecycling at least a fraction of said separated solid phase within said wet air oxidation reactor.