Patent ID: 8919743

Claim:
An apparatus for dissolving a gas in a liquid, comprising: (a) a dissolution tank which includes: (i) a pressure vessel configured to contain a treated fluid and at least one gas in a head space above the treated fluid, (ii) at least one inlet configured to permit passage of an untreated fluid into the head space so as to dissolve gas contained in the head space in the untreated fluid, and (iii) an outlet configured to permit passage of the treated fluid out of the pressure vessel; (b) a fluid supply system configured to provide the untreated fluid from a fluid source to the at least one inlet of the dissolution tank; (c) a gas supply system configured to transport the at least one gas from a gas source to the head space contained with the pressure vessel; and (d) a discharge device external to the dissolution tank, in communication with the outlet, and immersed in a target liquid, the discharge device positioned inside an entrainment tube having a first open end and a second open end, the discharge device configured to pass the treated fluid from the dissolution tank into the target liquid.