Water Pollution Control Corporation

Paul M Thayer

Lloyd Ewing

David T Redmon

Frank L Schmit

William H Roche

In a ring channel aeration system, circulation is provided by one or more hydraulic jumps while the major portion of the energy consumed in aeration is allocated to the release of oxidative process gas through horizontally non-propulsive bubble release means having an oxygen transfer efficiency of at least about 6. The hydraulic jump(s) may be powered by discharge of gas (e.g. the same gas used for aeration) through gas discharge means, in which case the system of gas discharge means and bubble release means may have an overall oxygen transfer efficiency of at least about 6. The invention has advantages of flexibility and resultant energy savings as compared to single device circulation/aeration systems, in that excessive energy need not be consumed in aeration to obtain the requisite circulation and vice versa.

Ring channel aeration apparatus and method

A swing diffuser apparatus for gas diffuser systems for liquid treatment is disclosed in which an array of diffusers (50) is movable between a deeply submerged, essentially horizontal operating position, a shallowly submerged, essentially horizontal operating position, and a fully exposed, substantially upright position at the edge of the container for the liquid. An articulated hanger arm linkage (22, 24, 26, 30, 32, 52, 54) rotates the array to achieve these positions as the linkage folds and unfolds.

Swing diffuser

A sewage aeration system comprising a header pipe, plenums of synthetic thermoplastic or thermoset resin with side walls inclined upwardly and outwardly to diffusion element support means, generally horizontal diffusion elements free of through-holes other than air diffusion pores, retaining means securing the elements about their peripheries to the plenums, sealing means adjacent the peripheries of the diffusion elements and airflow regulator members which terminate in the plenums beneath the horizontal diffusion elements.

Sewage aeration system

An aeration system for a sewage treatment tank including headers having connectors longitudinally spaced along the header, the connectors being adapted to receive air diffusers; means supporting the header horizontally in a tank; and means for rotating the header on its axis to level the connectors.

Sewage treatment aeration systems

An aeration system for a sewage treatment plant, including headers having diffuser connectors longitudinally spaced along the header, the connectors having nipples formed thereon which are welded to nipples formed on the header.

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Milwaukee, WI, United States of America

Paul M Thayer