METHOD FOR BIOLOGICAL POST-TREATMENT OF REJECT WASTE WATERS IN OPEN DRAINAGE CHANNELS USING IMMOBILIZED MICROORGANISMS Russian patent published in 2005 - IPC

FIELD: waste water treatment.

SUBSTANCE: method us intended for use in municipal economy, hydropower engineering, oil fields, and petroleum processing industry to reduce amounts of impurities discharged into fish-industry reservoirs. Method comprises creating, in open drainage channels, curtains with developed surfaces for immobilization of microorganisms, controlling amount of biomass secured on curtains in accordance with water-dissolved oxygen, establishing hydraulic-mode travel of water in open drainage channel ensuring optional utilization of the latter in the waste water treatment process. Biological treatment is accomplished by biocenosis attached to wire-brush curtains located in displaceable containers. Curtains are installed along the drainage channel with intervals allowing saturation of water with oxygen. Removal of excess biomass and deposits from wire brushes is accomplished by removing containers from the channel, placing them into water-filled tank, and regenerating were threads of brush by bubbling surrounding water, after which containers are reinstalled in the channel. Thickening of accumulated removed insoluble matters is achieved by circulation of polluted water from tanks through filter presses introducing intermediate flocculant treatment.

EFFECT: increased stability of post-treatment process and facilitated removal of accumulated deposits.

2 cl, 1 dwg