METHOD FOR TREATING WASTEWATER CONTAINING PHARMACEUTICAL MICROPOLLUTANTS

摘要

A completely biological process for eliminating micropollutants of pharmaceutical origin in waste water and the installation for implementing the process, the process comprising the steps of: - in a first treatment, introducing the waste water (1) into the membrane and moving bed bioreactor (11) (MB-MBR) populated by a first microbial consortium during a first retention time; - in a second treatment, introduce the wastewater (1) treated by the bioreactor (11) into the biofiltration tank (12), distinct from the bioreactor tank, comprising one or more columns with biologically activated charcoal (CAB) and adsorbing the residues of micropollutants of pharmaceutical origin on the biologically activated charcoal; - allowing the biologically activated charcoal to colonize having adsorbed the residues of micropollutants of pharmaceutical origin by a second microbial consortium in the form of biofilms during a second retention time, the te mps of total hydraulic retention, consisting of the sum of the first retention time and the second retention time, being determined to lower in the treated wastewater (2) the concentration of one or more micropollutants of pharmaceutical origin below its limit of detection and / or to obtain an overall efficiency of elimination of micropollutants of pharmaceutical origin greater than 80%, preferably greater than 95%, of their content in the starting wastewater (1).