Patent ID: 6531058
Filing Date: 2003-03-11
Classification: C02F

Abstract:
A biological fluidized bed apparatus for the treatment of wastewater comprising:a reactor tank having a 60 degree conical bottom; a media bed within said tank; a recirculation pipe within said tank having an upper inlet, and a lower conformed outlet fitting within said media; a solids collection trough located above said media bed, said trough having a solids thickening means and a sloped bottom for deflecting gas bubbles to the center of the tank; a conical solids/gas/liquid separation means disposed above the said solids trough, said conical separation means having an upper and a lower cone creating a down-flow compartment to direct suspended solids into said solids trough; a quiescent zone forming a sludge blanket clarification means within said tank external to said conical separation means, said quiescent zone having a treated effluent weir, a rotating surface skimmer and a scum collection means; a recirculation outflow port within said solids trough, in the mid-upper part of the said tank; a pump for withdrawing water from the said recirculation outflow port; said pump having a discharge pipe connected to said recirculation pipe inlet, forming a means for fluidizing the said media bed; and a means for introducing untreated wastewater into said pump discharge pipe.