Patent ID: 8721889
Filing Date: 2014-05-13
Classification: B01D,C02F,C05F,Y02P,Y02W

Abstract:
1. A method for treating wastewater that contains solids and biological oxygen demand compounds, the process comprising: separating a majority of the solids and biological oxygen demand compounds from the wastewater feed using a primary separation process to provide a solids phase and a water phase including wastewater, the solids phase containing an initial level of pathogens; irradiating the solids phase to reduce the level of pathogens; mixing the wastewater with adsorbent material in a mixing zone for a time sufficient for adsorption of contaminants from the wastewater onto the adsorbent material; separating and removing a major portion of the wastewater from the mixture of wastewater and adsorbent material; passing the adsorbent material having contaminants adsorbed thereon and a minor portion of the wastewater to a biological regeneration reactor; retaining the adsorbent material and wastewater in suspension in the biological regeneration reactor for a period of time that is sufficient to allow microorganisms in the biological regeneration reactor to biologically act on at least a portion of the adsorbed contaminants; discharging biologically treated water effluent from the biological regeneration reactor; and recycling regenerated adsorbent material to the mixing zone.