Abstract: A method for treating and upgrading effluents containing at least a metallic sulphate comprising adding at least a base to the effluent to precipitate the metallic ions in the form of iron oxy-hydroxides Fe(OHx) wherein x=2 and/or 3; separating the precipitated hydroxide calcium sulphate CaSO4; and separating the calcium sulphate CaSO4 precipitated during the preceding step. Said method enables obtainment of calcium sulphate (white gypsum) substantially free of metals and therefore capable of being upgraded and iron oxy-hydroxides likewise capable of being upgraded.

Abstract: A method for treating at least one liquid fluid comprising a high water content, and including a volatile fraction and a heavy fraction, in order to separate said two fractions. Said method consists in burning at least one gas fluid, recuperating the heat released by said combustion for subsequently heating the liquid fluid. The heated liquid fluid is pressurised and then expanded so as to separate the volatile fraction from the heavy fraction. The volatile fraction is then burnt with the gas fluid. The heavy fraction is extracted from the process to be subsequently treated. The invention also concerns an installation for implementing the treatment method.

Abstract: In a method for the rehabilitation of polluted soils by means of a third substance, the polluted soils, excavated and processed beforehand, are introduced into a contacting cell in the lower part of which the injection of the third substance, towards the lateral walls of said cell, forms a polluted solution subsequently collected in the upper part while the soils continuously separated from the polluted solution are recovered at the lower part of said cell before being rinsed and dried.

Abstract: The disclosure relates to a method and installation for the destruction and of containers containing dangerous and noxious laboratory wastes, by explosion in a submerged medium. The automatic treatment installation comprises: at least one basin filled with water for submersion of the containers; means for the automatic conveyance and subsequent submersion of the baskets carrying waste containers; explosion means (explosive fuses and detonators); these means being integrated into a whole complex comprising: an area for the loading of the baskets; a room for the storage of explosives and a room for the storage of the detonators, with safety areas; and a system for the recovery of the broken containers. This method and installation can be applied to the destruction of wastes and products from all laboratories chemicals facilities.

Abstract: The disclosure relates to the field of the storage of toxic wastes, in solidified form, without the creation of any pollution, on appropriate artificial sites. Briefly, a concrete raft is cast on a ground stabilized in depth, said concrete raft being constituted by slabs having joints between them and being arranged in a diamond moulding. This raft can support a tight-sealing material. Wastes are then piled up on the raft in maintaining the shape of a tumulus-like mound, the positioning being done under the protection of a movable cover comprising a travelling crane provided with rolls of plastic film.