Abstract: An apparatus comprises a settling chamber with outlet pipes to discharge purified liquid and sludge and an electrocoagulation chamber installed in the settling chamber and communicating with the latter. The electrocoagulation chamber has an inlet pipe to feed contaminated liquid, an inlet pipe to feed electrolyte, and a system of soluble electrodes disposed below the inlet pipe to feed contaminated liquid. Apertures are provided in the walls of the electrocoagulation chamber along the perimeter thereof below the liquid level in the settling chamber, the apertures receiving the nozzles of injectors which transfer a part of foam from the electrocoagulation chamber to the settling chamber.

Abstract: An apparatus for electrochemical purification of contaminated liquids comprises a settling chamber having an outlet pipe to discharge purified liquid and communicating with an electrocoagulation chamber having soluble electrodes and inlet pipes to feed contaminated liquid and electrolyte, respectively. The apparatus also incorporates piping to return the purified liquid whose purification degree is less than the set value from the settling chamber to the electrocoagulation chamber for re-purification and a purification degree controller which includes a liquid purification degree analyzer, a control unit, and actuating means serving to interrupt the discharge of the purified liquid and the supply of the contaminated liquid and of the liquid whose purification degree is less than the set value, said analyzer, control unit, and actuating means being electrically interconnected.

Abstract: An apparatus for electrochemical purification of contaminated liquids comprises a settling chamber having an outlet pipe for pure liquid and communicating with an electrocoagulation chamber having an inlet pipe for contaminated liquid and an inlet pipe for electrolyte to be supplied thereto. The lower part of the electrocoagulation chamber is provided with a system of soluble electrodes set up within the same part while the upper part of the settling chamber is provided with a system of insoluble electrodes set up lower than the open end of the electrocoagulation chamber. Above the insoluble electrodes there is a distributor having orifices and passages for the liquid to flow from the electrocoagulation chamber to the settling chamber and for foam and a gas to leave the same chambers.