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Useful model relates to devices for electrochemical purification of waste water from compounds of non-ferrous and rare-earth metals and can be used at enterprises of nonferrous and ferrous metallurgy, mashinostro Details, priborostro Details, radio electronics, electrical industry. Device has body with electrolyzer and chamber electroflotation. New, according to proposed utility model, is, that side anode chamber of the electrolysis cell are provided with branch pipes for input and output of waste water and pipelines, connecting them with cathode chamber, inside side anode chambers are additionally located anion-exchange membrane and cathode. Proposed device provides diffusion lu productivity processes membrane electrolysis.