Biological waste water treatment apparatus and a method of produ

Details Biological waste water treatment apparatus and a method of produ Biological waste water treatment apparatus and a method of produ

1977-12-28

1979-06-05

Cuchlinski, Jr., William A.

Liquid purification or separation

With gas-liquid surface contact means

261 92, 264572, B01D 2100

Patent

active

041573030

ABSTRACT:
A rotating disc-type biological waste water treatment apparatus comprises rotating disc assemblies rotatively driven while their lower halves are immersed in waste water. This rotating disc assemblies include a plurality of impellers, each comprises two parallel discs fixed to a main shaft, one of the discs being formed at its center with a suction opening, and impeller blades radial to the main shaft between the two discs, thereby increasing the surface areas of the rotating disc assemblies without increasing the driving power. Besides, only by closing the outer peripheries of the two discs the apparatus can perform the anaerobic denitrification.
According to the invention the impeller is divided into a plurality of sectors consisting of two sector side plates and two impeller blades which are integrally formed by blow molding and then arranged side by side to form a sector block. Thus produced sector blocks are then arranged about the main shaft and fixed thereto to form a rotating disc assembly.

REFERENCES:
patent: 2209877 (1940-07-01), Ferngren
patent: 3613890 (1971-11-01), Hellqvist
patent: 3703238 (1972-11-01), Torpey
patent: 3886074 (1975-05-01), Prosser

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