Patent ID: 8021551

Claim:
A system for treatment of wastewater from an animal confinement operation including: at least a first lagoon receiving water from said confinement operation; a first artificial wetland contained in a liner, said first artificial wetland is a free water surface wetland, water from said lagoon flows into said first artificial wetland through an influent and is contained within said first artificial wetland and said first artificial wetland including a first plurality of wetland plants; a flow control receiving water from said first artificial wetland and said flow control providing water to a second wetland wherein said second wetland is a subsurface flow wetland including a course gravel bed, a pump recirculating water from said subsurface flow wetland to a vertical flow recirculating media filter including a second plurality of wetland plants, wherein ammonia in said water is converted to nitrate as it contacts roots of said second plurality of wetland plants, wherein said recirculation pump is located in a pit below said coarse gravel bed and said flow controls the water level in said first artificial wetland.