In work various options of use of ejectors as the mixer of reagents with the purified water are considered. The ejector functioning as the jet pump allows to dose and mix reagent with waste water. At the same time hashing of reagents with water promoted by vials of podsasyvayemy air. Other option – the use of ejectors with magnetic elements. The effect of an intensification of hashing under the influence of magnetic field of various liquid mixes, one of which is conductive, was open by the author earlier for mixture of various liquid mixes. The essence of effect consists in what at the movement of electrolyte in magnetic field in solution influences ions induced electric weeding that promotes an intensification of molecular diffusion.