METHOD FOR PREPARING OF SEWAGE WATER FOR AEROBIC BIOLOGICAL PURIFICATION PROCESS Russian patent published in 2007 - IPC C02F9/14 C02F3/30 

FIELD: treatment of domestic and industrial sewage water for aerobic biological purification process for removal of organic and mineral contaminants, may be utilized in large-scale and average-scale purification stations.

SUBSTANCE: method involves providing processes of sieving, flotation, averaging consumption and contaminant concentration before feeding of sewage water for aerobic biological purification process, with basic sewage water being preliminarily subjected to flotation separation process; directing clarified sewage water into consumption and contaminant concentration averaging device; directing flotation concentrate into anaerobic reactor for fermentation at acid fermentation stage; separating fermented flotation concentrate into liquid and solid phases using screw-type thickeners and strainers; accumulating liquid phase in specialized accumulators for mixing with sewage water fed from consumption and contamination concentration averaging device for aerobic biological purification process; discharging solid phase in container for further disposal onto landfill for solid domestic wastes.

EFFECT: simplified sewage water purification process, reduced capital and operating expenses, and decreased consumption of power.

4 cl, 1 dwg, 2 ex