Patent ID: 6565750
Filing Date: 2003-05-20
Classification: C02F,Y10S

Abstract:
A method of treating wastewater influent comprising the steps of:a. receiving said wastewater influent in a clarifying tank; b. passing said influent from said clarifier tank through an inlet positioned at the bottom of an anoxic filter tank having a sludge biomass positioned in contacting relationship to said bottom and a plurality of media coated with bacteria suspended above said biomass, wherein said influent flows upwardly through said anoxic filter tank; c. passing said influent from said anoxic filter tank to an oxic filter tank; and d. recirculating a portion of said influent that contains nitrates from said oxic filter tank to said anoxic filter tank, thereby converting said nitrates to nitrogen gas, and passing a portion of said influent that does not contain nitrates to a final clarifying tank.