Device and method for gassing a liquid

A device for gassing a liquid, comprising a rotor (1) driven to rotate around a vertical rotation axis and having multiple vanes (10) for conveying the liquid and a stator (2) that surrounds the rotor (1) and having a plurality of flow channels (20), which each extends starting from a radially inner inlet opening (21) adjacent to the rotor (1) through the stator (2) to a radially outer outlet opening (22) and are delimited along their length by side walls, bottom surfaces, and top surfaces and can be acted on with liquid by the rotor (1) near the inlet opening (21), comprising between the inlet opening (21) and the outlet opening (22), the side walls and/or bottom and top surfaces of the flow channels (20) having a multitude of gassing openings (24), which can be acted on with a compressed gas from a compressed gas source in order to introduce the gas into the flow channels (20);

• wherein between adjacent flow channels (20) a respective wedge-shaped dividing element (25) is provided, which has side surfaces (250) that each constitutes at least a subsection of a side wall of one or both adjacent flow channels (20) and the gassing openings (24) are provided in the side surface (250) and wherein a tip of each wedge-shaped dividing element (25) points toward the rotor (1).