B - Operations – Transporting – 01 – F
Patent
B - Operations, Transporting
01
F
259/39, 362/9
B01F 5/02 (2006.01) B01F 13/02 (2006.01)
Patent
CA 1152979
Abstract of the Disclosure Combination of a diffusion element useful for sewage aeration, an element holder, a seal and a peripheral retaining means. The diffusion element has upper and side faces which are both gas permeable at pressures normally encountered in sewage aeration, when in contact with a liquid medium. The diffusion element is supported by the element holder and the seal is an elastomeric ring positioned at the periphery of the upper face of the diffusion element, preferably abutting a topmost portion of the peripheral side face. The peripheral retaining means is preferably a positioning ring affixed to the element holder and adjusted to retain the elastomeric sealing ring or uniformly press it into sealing engagement with the diffusion element to block the emission of aeration bubbles from its peripheral side face into the liquid medium. The elastomeric ring and retaining means are positioned and shaped to provide substantially all of the gas permeable area of the upper face of the element with free access to surrounding liquid to avoid the formation of air pockets at the surface of the air discharge face.
345544
Ewing Lloyd
Redmon David T.
Gowling Lafleur Henderson Llp
Water Pollution Control Corporation
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