WATER TREATMENT PLANT COMPRISING A TANK FOR CONTACTING WATER WITH A PULVERULENT REAGENT AND A FLOCCULATING OR COAGULATING REAGENT, AND CORRESPONDING PROCESS

摘要

The plant, in which water is purified and/or rendered potable, has a contact tank (1) through which the water passes and interacts with an inorganic powder with a high specific surface, and with coagulant and flocculant agents, injected via first, second and third injection systems (3, 6, 7). After the contact tank the plant can have a decantation unit (4) with a system for recuperating decanted material, which is partially reinjected into the contact tank. It can also include filtration (8) and ultraviolet treatment units. The powdered reagent is selected from the following group: powdered active carbon, powdered or activated clay, ion exchange resin, powdered or activated aluminium.