Galvanochemical cleaning of sewages is realized in the field of short circuited galvanic elements forming multiple galvanopairs in the presence oxygen of the air without external electric field. No chemical reagents required. Shown efficiency of the method for removing of Cu, Cr, Ni, Zn, As ions, as well as fluoride, phosphate and cyanide anions and oil products, surface-active and flotation reagents. Cleaned water can be recycled for some processes non-critical toward residual concentration of admixtures. Galvanochemical methods is applied on number of enterprises in Russia and in C.I.S. countries, in other countries.