Abstract: Water cleaning device with at least one reactor device (4) for electrolytic cleaning of polluted water, assembled of one or more anodes (1a) and cathodes (2a), one flotation device (14, 15) and one device for handling sludge (23, 24, 18). The water flow inside and just outside (downstream) of the electrochemical reactor (4) is turbulent. The turbulence is created by one or more mechanical devices which affect the flow pattern.