Patent ID: 8025798

Claim:
In a packaged modular biological fluidized bed reactor system containing an aeration tank-clarifier for continuously reducing organic biodegradable impurities in wastewater comprising: a. An inlet pipe to introduce said wastewater into said modular biological fluidized bed system, b. a high efficiency grinding disintegrator to grind organic biodegradable impurities in wastewater, c. a head suppression chamber for receiving and conveying the wastewater with the ground particles, d. a tangential grit removal chamber that receives wastewater with said ground particles, said tangential chamber having a conical bottom wherein said ground particles settle, e. a container placed below said tangential chamber to receive said ground particles from said conical bottom of said tangential chamber, f. a split chamber to receive said wastewater from which said ground particles have been removed and g. at least one aeration tank-clarifier capable of receiving blown air which provides hydraulic recirculation provided by oxygen supplied from an air blower and disinfectant is supplied from a unit outside of said aeration tank-clarifier, wherein remaining organic impurities in said wastewater are biochemically oxidized and disinfected and said wastewater and an activated sludge are separated from the clarified effluent of said wastewater in a fluidized bed; the improvement wherein a system of baffles and recirculation tubes are present such that said oxygen provided by said air blower into said aeration tank-clarifier is capable of flowing along said system of baffles and sucked into the upper ends of said recirculation tubes to enhance air flow in said aeration tank-clarifier upon exiting from the lower ends of said recirculation tubes; thereby providing conditions for aeration, formation of a fluidized bed and liquid mass recirculation flow between all hydraulic circulation zones in said aeration tank-clarifier to result in a high reactor mass concentration within reaction volumes.