Abstract: A device for gassing liquids, in particular for aerating waste water, includes a gas distributor that can be connected to a gas supply device, that is to be arranged below the liquid level and that has at least one membrane-like wall made of a flexible material with a plurality of gas discharge openings. The wall is designed as a support-free bubble member that is held only by at least one gas supply fitting and is closed, except for such at least one gas supply opening and the gas discharge openings.

Abstract: An apparatus for the aeration of off-water or the like media in an aeration tank with the aid of an aeration face arranged below the water surface. The device comprises a rigid, self-supporting supporting body provided with througholes or being of porous material and covered with an elastic diaphragm; air is supplied to the supporting face of the body at the center of gravity or a gravity line thereof into a deflecting region and from there to the periphery of the body which is slightly raised vis-a-vis the central region of the body, from where the air escapes with decreasing pressure into the water to be aerated. The aeration face can be adapted to be swivelled, and the cross-sectional area of the supporting body can be of pyramid, wedge, circular or frustoconical configuration or it can be vaulted in a concave or convex manner. Basic shapes of the supporting body are a circular or a polygonal, preferably rectangular configuration.

Abstract: A process for the aeration of off-water or the like media in an aeration tank with the aid of an aeration face arranged below the water surface as well as an aeration device for carrying out this process in practice are described. The device comprises a rigid, self-supporting supporting body provided with throughholes or being of porous material and covered with an elastic diaphragm; air is supplied to the supporting face of the body at the center of gravity or a gravity line thereof into a deflecting region and from there to the periphery of the body which is slightly raised vis-a-vis the central region of the body, from where the air escapes with decreasing pressure into the water to be aerated. The aeration face can be adapted to be swivelled, and the cross-sectional area of the supporting body can be of pyramid, wedge, circular or frustoconical configuration or it can be vaulted in a concave or convex manner.