Patent ID: 6365048
Filing Date: 2002-04-02
Classification: C02F,Y02W

Abstract:
A process for the treatment of water to reduce amounts of pollutants in the water which comprises:(a) directing the water containing the pollutants, which pollutants are ozonated, through a microbiologically active fluidized bed of particles in a vessel with an inlet and an outlet for the water so that the bed is fluidized by the water and the pollutants are degraded by microorganisms in the bed; (b) providing a carbon source through the inlet to a lower region of the fluidized bed in the vessel as the water is moved through the fluidized bed in the vessel, without providing the carbon source to the upper region of the fluidized bed in the vessel, in an amount sufficient for the microorganisms in the lower region of the fluidized bed to grow biofilm layers around the particles in the lower region of the fluidized bed in the vessel which then migrate to the upper region of the fluidized bed wherein the microorganisms in the biofilm layer degrade the pollutants to produce an effluent; (c) removing the effluent from the outlet from the vessel; and (d) filtering the effluent from the vessel wherein the water with the reduced amounts of the pollutants is produced.