High dissolved oxygen mixer-digester
OwnerGerhardt Van Drieinventor
Life of this patent
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Abstract
A sludge digester comprises a mixing tank providing an integral ceiling, interior wall surface and a floor surface. A vertical beam supports a mixing device engaged for movement along the vertical beam. A plurality of sparger jets protrudes from the wall surface for delivering an oxygen gas flow directly into the interior of the sludge. A second plurality of sparger jets terminates at the mixing tank floor surface for delivering oxygen gas into the mixing tank and a plurality of bubbling diffusers protrudes upwardly from the floor surface for delivering further oxygen gas flow into the mixing tank.
Claims1
An apparatus for improving digestion rates in a sludge digester which comprises:
- a circular mixing tank providing an integrally formed ceiling, interior wall surface and floor surface;
- at least one vertical beam engaged with and extending upwardly from the floor surface;
- a mixing means engaged for movement along the vertical beam;
- a plurality of sparger jets protruding radially inwardly from the wall surface and covering at least 70% of the wall surface, for delivering gas flow into the mixing tank;
- a further plurality of the sparger jets terminating at the floor surface for delivering gas flow into the mixing tank;
- and a plurality of bubbling diffusers protruding upwardly from the floor surface for delivering gas flow into the mixing tank;
- the bubbling diffusers arranged in a circular pattern with a diameter equal to approximately ⅔ of the diameter of the mixing tank.
Dependencies are inferred from the claim text.