Device for lake restoration by oxygen-enriching of the water

Details Device for lake restoration by oxygen-enriching of the water Device for lake restoration by oxygen-enriching of the water

1975-02-21

1977-11-29

Lutter, Frank W.

Gas and liquid contact apparatus

Contact devices

Injector type

210221P, 210242A, 261120, 261123, 261124, B01F 304

Patent

active

040605744

ABSTRACT:
A method and a device for restoration of lakes by oxygenation of the water. A lake having a depth exceeding 8-10 meters is oxygenated by air-treatment of the lower and colder hypolimnion layer only. Air is introduced into the hypolimnion and is prevented from rising and thereby reaching the upper, warmer epilimnion layer by an air-entrapping bell-shaped housing which is located above the air introduction zone. The device comprises a vertical tube, the upper end of which terminates within said housing and the lower end of which is equipped with an air nozzle. The tube acts as an air-lift pump by which the water is circulated through the housing. The housing is provided with an air outlet at its uppermost part and water outlets at its lowermost part. Ducts for distributing oxygenated water over the lake are connected to the water outlets.

REFERENCES:
patent: 1619430 (1927-03-01), Mauran
patent: 2353195 (1944-07-01), Sims
patent: 2825541 (1958-03-01), Moll et al.
patent: 3183065 (1965-05-01), De Bolt
patent: 3193260 (1965-07-01), Lamb
patent: 3503593 (1970-03-01), Nelson
patent: 3547811 (1970-12-01), McWhirter
patent: 3642257 (1972-02-01), Tanaka et al.
patent: 3671022 (1972-06-01), Laird et al.
patent: 3794303 (1974-02-01), Hirshon
patent: 3799511 (1974-03-01), Svantesson

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