Patent ID: 6971843

Claim:
A hydraulic turbine adapted to introduce oxygen into water flowing through a water passageway of the turbine, the turbine comprising: a rotatably mounted runner; a draft tube extending downstream of the runner, the draft tube having a first inside wall; a gas distribution manifold mounted to, and extending at least substantially around, the first inside wall of the draft tube, and the gas distribution manifold having a plurality of gas outlet ports distributed around the gas distribution manifold; and, an oxygen containing gas supply passing through the first inside wall of the draft tube and being connected to the gas distribution manifold for supplying an oxygen containing gas to the gas distribution manifold whereby the oxygen containing gas flows around the gas distribution manifold within the draft tube and is discharged from the plurality of gas outlet ports of the gas distribution manifold into the water passageway to increase dissolved oxygen in the water discharged from the water passageway.