The ejection way of water aeration is considered in the work. The various devices used for dispersing the water-air mixture in order to obtain finely dispersed bubbles, have been analyzed, their advantages and disadvantages have been indicated. An original dispersing device, characterized by simplicity of implementation, versatility and a number of other advantages, which allows to obtain the required parameters at lower power consumption compared with analogues, has been proposed. It has been experimentally shown that the proposed dispersing device makes it possible to obtain fine bubbles with sizes less than 100 microns, and the obtained density distribution functions are polymodal. The dependences of bubble sizes and aeration intensity on the ratio of the jet diameter at the outlet of the ejector to the geometric parameters of the dispersant are obtained.
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