METHOD FOR TREATING AN AQUEOUS EFFLUENT TO ABATE THE DISSOLVED HEAVY METAL AND/OR RADIOACTIVE SUBSTANCE CONTENT OF SAME

摘要

Method for treating water to abate the heavy metal and/or radioactive substance content of same, 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 said radioactive substances by injecting at least two different precipitating agents (14, 15) into said first tank, at least one of said precipitating agents being a preformed precipitate, a first coagulation and/or flocculation step in a first coagulation and/or flocculation area (17) for the water coming from the first contact tank (13), a first step of solid/liquid separation of the water coming from the first coagulation and/or flocculation step, thus producing a first clarified liquid and a first sludge, a step of recirculation of at least some of said first sludge into the first contact tank (13).