The United States of America, As Represented by the Secretary of the Interior

Scott Roy Irvine

Andrew P Murphy

Robert Lee Riley

A method of degassing a volume of supersaturated liquid is provided which comprises introducing a plurality of microbubbles of gas substantially near the bottom of the volume of supersaturated liquid so that the microbubbles percolate up through the volume of supersaturated liquid to thereby effect removal of dissolved gas in the volume of the supersaturated liquid at the top of the volume. In one embodiment, the step of introducing microbubbles comprises introducing the microbubbles by recirculating deionized water through a hollow fiber microfiltration membrane. In another embodiment, the step of introducing microbubbles comprises introducing the microbubbles through a pipe from the turbine of a dam. In most applications, the volume of supersaturated liquid is water and the microbubbles of gas comprise air. The volume of supersaturated water advantageously comprises a volume of a river, lake or stream which is near a dam with a turbine.

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Littleton, CO, United States of America

Scott Roy Irvine