Gas and liquid contact apparatus – Contact devices – Liquid tank
Patent
1976-06-23
1977-09-06
Blunk, Evon C.
Gas and liquid contact apparatus
Contact devices
Liquid tank
239145, B01D 4702
Patent
active
040468453
ABSTRACT:
An air-permeable diffuser disc (diffuser element) for use in an air diffuser head for aerating liquids, particularly sewage, characterized by the outer periphery of said permeable disc having a higher density than the balance of said disc, rendering same substantially impermeable, thereby preventing edge leakage which generates larger, undesirable bubbles, by forcing all air to diffuse from the outer, horizontal face of said element into the liquid to be aerated, resulting in a uniform flow of smaller, more effective bubbles.
REFERENCES:
patent: 1936305 (1933-11-01), Leffler
patent: 2040941 (1936-05-01), Jones
patent: 3083953 (1963-04-01), Langdon et al.
patent: 3970731 (1976-07-01), Oksman
Blunk Evon C.
Ferro Corporation
Mar Michael
Simmons Milton L.
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