C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/21
C02F 3/08 (2006.01)
Patent
CA 1140279
A device for flushing and aerating a surface coated with microorganisms in a plant for biological purification of waste water. A B S T R A C T A rotary system composed of two worms which are built together and interconnected at their central coils, said worms having their respective coils oppositely directed to one another and consisting of spirally coiled pipes, is used for flushing and aerating a medium which is disposed in the pipes and coated with micro- organisms. The microorganisms take up nutrients from waste water in a biological purification process, one worm with part of its periphery immersed in the water lifting quantities of water towards its centre, the other worm lowering the water to the original level. This provides for alternate flushing and aeration, and the weight of the water in said second worm provides a torque which contributes towards driving the system.
354725
Frandsen Aksel S.
Swabey Ogilvy Renault
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