Low-turbulent aerator and aeration method

An aeration method comprising:

• providing an aerator that comprises of:
• gas conveyance tube having a gas inlet end and a gas outlet end;
• a substantially vertically oriented gas-liquid mixture chamber having an upper end with a gas intake opening that is in communication with the outlet end of the gas conveyance tube;
• at the least one impeller affixed to a rotatable shaft and housed within and positioned near the upper end of the gas-liquid mixture chamber below the gas intake opening, wherein rotation of the at least one impeller creates a low-pressure zone or vacuum which draws gas from the gas intake opening at the upper end of the gas-liquid mixture chamber;
• at least one gas bubble discharge opening positioned at a bottom end of the gas-liquid mixture chamber;
• submerging the gas-liquid mixture chamber into a body of liquid;
• activating rotation of the shaft to which the at least one impeller is affixed, whereby rotation of the at least one impeller creates the low-pressure zone or vacuum that allows gas introduced into the gas conveyance tube to be drawn into the upper end of the gas-liquid mixture chamber;
• providing a liquid conveyance conduit having an inlet end and an outlet end, whereby liquid from the outlet end of the liquid conveyance conduit enters into a liquid intake opening of the gas-liquid mixture chamber as a result of a central suction vortex generated by the rotating impeller, the liquid intake opening being positioned near to the bottom end of the gas-liquid mixture chamber;
• generating gas bubbles via the rotation of the at least one impeller wherein the gas from the upper end of the gas-liquid mixture chamber is brought into contact with the rotating impeller;
• forcing the gas bubbles to move downward in a radial and helical motion within the gas-liquid mixture chamber via the rotating action of the at least one impeller;
• confining the radial and helical downward motion of the gas bubbles within the gas-liquid mixture chamber whereby the shearing action of the at least one rotating impeller and incoming liquid entering the bottom end of the gas-liquid mixture chamber produces gas bubbles that are predominantly less than 0.85 millimeters in size;
• and
• discharging the gas bubbles via the at least one discharge opening at the bottom end of the gas-liquid mixture chamber into the body of liquid with minimum turbulence and wherein incoming liquid entering at the bottom of the gas-liquid mixture chamber is of a greater pressure than the internal gas bubble pressure.