Liquid purification or separation – Processes – Treatment by living organism
Patent
1998-09-21
2000-08-15
Upton, Christopher
Liquid purification or separation
Processes
Treatment by living organism
210629, 210170, 210194, 210220, 2102424, 261 35, 261 77, 261123, C02F 330
Patent
active
061031232
ABSTRACT:
A facultative lagoon, an airlift aerator for such a lagoon, and a method of operating such a lagoon. The aerator includes a U-shaped body with a down flow leg and an airlift leg and a float. The float sustains the U-shaped body with respect to the surface of polluted material contained in the lagoon. The upper ends of the legs are submerged slightly beneath the surface of the material in the lagoon. The down flow leg has a water inlet and the airlift leg has the water outlet. A bubble generator is connected to a lower portion of the airlift leg. Air supplied under pressure to the bubble generator introduces bubbles into the airlift leg which establishes a water circulation through the U-shaped body. Bubbles transfer oxygen to the passing water which is disbursed through the water outlet. The dissolved oxygen is used in the biodegradation of the hazardous and odorous gases of the waste material that would otherwise be emitted into the atmosphere.
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