Device for aerating sewage or sewage-sludges
OwnerTheo Stahlerinventor
Life of this patent
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Abstract
The invention relates to an aerating device for sewage and comprises a drum-like rotor which rotates in a trough and is divided, by axially-parallel partitions, into a plurality of outwardly-open radial chambers, the said partitions being equipped with peripheral outer surfaces having apertures so that during rotation of the drum a volume of air is trapped in each chamber. Internal baffels in said chambers act to direct the trapped air initially to the lagging portion of the chamber and then, past bottom dead center, to the leading portion of the chamber, thereby efficiently aerating the sewage.
Claims18
A device for aerating sewage or sewage-sludges for the purpose of converting any harmful substances contained therein into harmless substances, said device comprising a sludge-aerating basin, a hollow element positioned to rotate therein about its axis, said hollow element being spaced from the inner wall of said basin;
- a portion of said hollow element protruding above sewage level when the basin is full, said hollow element having partitions directed parallel to and substantially and radially outwardly from the axis of rotation forming outwardly-open reaction chambers, the outer ends of said partitions continue approximately peripherally in both directions forming front and rear covering webs adjacent their outer portions having slotted apertures therebetween, with the front covering webs extending downwardly at the point where the partition dips beneath sewage surface, and the rear covering webs extending downwardly at the point where the partition emerges from beneath the sewage surface, said reaction chambers having baffle-plates directed radially from, and parallel with, the axis of rotation, for guiding air, the air effervescing around said baffle plates and being retained in said reaction chambers.
Dependencies are inferred from the claim text.