PROCESS FOR TREATING AN AQUEOUS EFFLUENT IN ORDER TO BREAK THE CONTENT OF HEAVY METALS AND / OR DISSOLVED RADIOACTIVE SUBSTANCES.

摘要

A method of treating water to reduce the content of heavy metals and / or radioactive substances, said method comprising, a step of introducing said water into a first contact tank (13), a first step of co-precipitation of at least some of said heavy metals and / or radioactive substances by injection into said first tank of at least two different precipitation agents (14, 15), at least one of which is a preformed precipitate, a first step of coagulation and / or flocculation in a first zone of coagulation and / or flocculation (17) of said water coming from said first contact tank (13), a first step of liquid / solid separation of said water from said first step coagulation and / or flocculation producing a first clarified liquid and first sludge, a step of recirculation of at least a portion of said first sludge in said first contact tank (13).