DEVICE FOR BIOLOGICAL ELIMINATION OF ORGANIC SUBSTANCES, NITROGEN AND PHOSPHORUS COMPOUNDS FROM SEWAGE WATERS Russian patent published in 1999 - IPC

FIELD: devices for biological treatment of sewage waters to remove organic matter, nitrogen and phosphorus compounds. SUBSTANCE: device has cylindrical-conical vertical bodies accommodating: post-aeration chamber with flotation separation of circulating sludge mixture, bioreactor chamber with fluidized bed of grainy sorbing material, weighted filter from activated sludge with denitrifying biocenosis kept in space between bases of conical sludge withdrawal funnels, chambers of gas separation and settling. Combination of chamber of anaerobic cultivation of recirculating return activated sludge, aeration chamber, recirculating pump, jet aerators provides for alternation of anaerobic and aerobic conditions of treatment with immobilized and weighted cultures of microorganisms and for removal, both, organic and biogenic substances. Interrelation of anaerobic-aerobic methods and multistage treatment system makes it possible to attain stabilization of sediments alongside with high-quality treatment of sewage waters. EFFECT: higher efficiency. 3 cl, 3 dwg