Hypolimnion oxygenation
First Claim
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1. A process for oxygenation of the hypolimnion of thermally stratified water bodies comprising the steps of:
- Withdrawing water from the hypolimnion at rate between 10 and 200 percent of the hypolimnion volume per month;
pressurizing the withdrawn water to superatmospheric pressure below 125 psig;
injecting at least 80 percent oxygen (by volume) gas in the withdrawn pressurized water at rate between 5 and 300 lbs. oxygen per million pounds withdrawn water but less than a rate resulting in oxygen supersaturation of the withdrawn water at the pressure in the hypolimnion at the point of remixing;
returning the oxygen gas - water mixture through conduit means to and remixing same with the hypolimnion at rate to produce frictional head loss of at least 4 psi per 100 feet length of said conduit means, and also at least 0.15 psi per pound of injected gas per one million pounds withdrawn water.
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Abstract
The hypolimnion of thermally stratified water bodies is oxygenated by withdrawing water therefrom at rate of 10-200 percent of the hypolimnion volume per month, pressurizing the withdrawn water to superatmospheric pressure below 125 psig, injecting at least 80 percent oxygen gas at rate of 5-300 lbs. O2 per million pounds withdrawn water but less than a rate to result in O2 supersaturation at the remixing point, returning the mixture through conduit means and remixing same at rate to produce specified frictional head loss.
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Citations
8 Claims
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1. A process for oxygenation of the hypolimnion of thermally stratified water bodies comprising the steps of:
- Withdrawing water from the hypolimnion at rate between 10 and 200 percent of the hypolimnion volume per month;
pressurizing the withdrawn water to superatmospheric pressure below 125 psig;
injecting at least 80 percent oxygen (by volume) gas in the withdrawn pressurized water at rate between 5 and 300 lbs. oxygen per million pounds withdrawn water but less than a rate resulting in oxygen supersaturation of the withdrawn water at the pressure in the hypolimnion at the point of remixing;
returning the oxygen gas - water mixture through conduit means to and remixing same with the hypolimnion at rate to produce frictional head loss of at least 4 psi per 100 feet length of said conduit means, and also at least 0.15 psi per pound of injected gas per one million pounds withdrawn water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- Withdrawing water from the hypolimnion at rate between 10 and 200 percent of the hypolimnion volume per month;
Specification