HIGH-PERFORMANCE BIOLOGICAL TREATMENT APPARATUS

The invention relates to a device for intensive biological waste-water treatment with freely moveable immersed biofilm, combined with mixing devices and, optionally, the introduction of air. The freely moveable immersed biofilm is used to immobilize specific micro-organisms in certain areas for waste-water treatment. In comparison with previously known devices, the invention is characterized in that the clarification process is more intensive due to the additional freely moveable, suspended/ floating immersed biofilm and its proportional oxygen supply from a special mixing device, provided upon emergence into the atmosphere in addition to aeration from fine bubbles. A substantially greater utilization of oxygen is obtained by enriching the air of the recycled sludge or waste-water through multiphase pumps. According to the invention, the activated sludge process is combined with the freely moveable immersed biofilm process in an installation. Said freely moveable biofilm is introduced into a sewage-treatment basin (1) as a biofilm carrier with an activated surface to immobilize specific micro-organisms in association with appropriate mixing devices (7) having a scooping effect due to paddles (3) and the proportion of activated sludge (6). Waste-water (4) flows through the sewage treatment basin (1) which comprises a retaining device (5) for the freely moveable immersed biofilm (2).