A facility for treating aqueous fluid, in particular for removing organic micropollutants and natural organic matter, comprising a single reactor for treating the aqueous fluid by contact with a fluidized bed of coagulated and flocculated powdered activated carbon, operating in upward flow, said reactor comprising a fluidized bed of coagulated and flocculated powdered activated carbon and being equipped with means for injecting new powdered activated carbon, coagulant and polymer, arranged so as to define in the reactor three distinct operating zones: • a first zone arranged at the base of the reactor comprising a liner advantageously consisting of a gravel bed surmounted by a sand bed to allow the intake and homogeneous distribution of the aqueous fluid pretreated by contact with the coagulant and the polymer, • a second zone, surmounting the first, consisting of the fluidized bed of coagulated and flocculated powdered activated carbon, and • a third zone, arranged in the upper part of the reactor for the separation and recovery of the purified aqueous liquid, wherein, • a hydraulic mixing is provided within the fluidized bed by means of at least one dispersion boom for the aqueous fluid to be treated, arranged in the first zone at the base of the reactor • an intake boom opening into the zone into a height in the lower to middle part of this fluidized bed, said intake boom being connected to the coagulant and new powdered activated carbon injection means; • coagulant injection means connected to the aqueous feed circuit; • the reactor comprises in its third zone arranged in the upper part, a draw off channel for channelling the purified aqueous liquid. • a first zone arranged at the base of the reactor comprising a liner advantageously consisting of a gravel bed surmounted by a sand bed to allow the intake and homogeneous distribution of the aqueous fluid pretreated by contact with the coagulant and the polymer, • a second zone, surmounting the first, consisting of the fluidized bed of coagulated and flocculated powdered activated carbon, and • a third zone, arranged in the upper part of the reactor for the separation and recovery of the purified aqueous liquid, wherein, • a hydraulic mixing is provided within the fluidized bed by means of at least one dispersion boom for the aqueous fluid to be treated, arranged in the first zone at the base of the reactor • an intake boom opening into the zone into a height in the lower to middle part of this fluidized bed, said intake boom being connected to the coagulant and new powdered activated carbon injection means; • coagulant injection means connected to the aqueous feed circuit; • the reactor comprises in its third zone arranged in the upper part, a draw off channel for channelling the purified aqueous liquid. • a hydraulic mixing is provided within the fluidized bed by means of at least one dispersion boom for the aqueous fluid to be treated, arranged in the first zone at the base of the reactor • an intake boom opening into the zone into a height in the lower to middle part of this fluidized bed, said intake boom being connected to the coagulant and new powdered activated carbon injection means; • coagulant injection means connected to the aqueous feed circuit; • the reactor comprises in its third zone arranged in the upper part, a draw off channel for channelling the purified aqueous liquid.