Device for gassing liquids

A gas distribution device for gassing a liquid by being positioned beneath the level of the liquid and connected to a gas supply source, said device comprising:

• a bubble assembly including a body member having a gas chamber, and a membrane-like wall formed of a flexible material and defining a bubble member mounted on said body member such that said bubble member defines an outer periphery of said gas chamber;
• gas supply fitting means connected to said gas chamber of said body member of said bubble assembly for mounting said bubble assembly to the gas supply source such that gas from the gas supply source may be fed through said gas supply fitting means into said gas chamber;
• said wall defining said bubble member having therethrough a plurality of gas discharge openings, such that when gas is supplied into said gas chamber at a pressure sufficient to overcome the pressure of the liquid, then the gas is discharged through said gas discharge openings and gasses the liquid;
• and
• said bubble assembly being shaped annularly and defining at least one liquid channel extending through said body member, whereby as gas is discharged through said gas discharge openings into the liquid, the gas rises through the liquid as bubbles and there is created a downward flow of liquid through said liquid channel.