| 摘要 |
<p>Process and plant intended for the treatment of so-called ammoniacal waters containing impurities of a nature which is, on the one hand, inorganic, such as aqueous ammonia in the free state or combined in the form of sulphides, cyanide, thiosulphates, thiocyanates, chlorides and the like and, on the other hand, organic, especially phenols and polycyclic aromatic hydrocarbons or PAH present in the soluble and insoluble state. This treatment process consists in that: - a solvent extraction operation is performed, subdivided into two separate phases one of which consists of a noncontinuous extraction in one or more stages and the other in a continuous extraction in a single stage (4); - the treatment is followed by a crystallisation operation (8) from which the treated water no longer carrying impurities (10) is finally taken. <IMAGE></p> |
