Patent ID: 7959790

Claim:
A method for electro-coagulation treatment of contaminated water comprising: providing an electrolytic cell including an anode and a helical cathode; causing the contaminated water to come into contact with the cell; applying a DC voltage across the anode and cathode of the cell so as to cause a current flow through the water so as to cause coagulation of contaminant particles in the contaminated water; and extracting the coagulated particles from the contaminated water; arranging the anode in the form of a central longitudinal member defining an outer anode surface surrounding the axis and extending along an axis of the cell; arranging the helical cathode in the form of an elongate member coiled helically around and along the anode so as to form a plurality of turns of the elongate member which turns are wrapped around the anode surface; and causing the cell to be automatically self cleaning by arranging the turns of the elongate member of the cathode so that the turns are spaced each from the next and are spaced from the anode surface so that the contaminated water flows both outside the turns of the helical cathode, between the turns of the helical cathode and inside the helical cathode between the turns of the helical cathode and the outer anode surface so that the coagulated particles are carried from the cell by the flow of the contaminated water.