Abstract: Apparatus for the purification of an aqueous effluent containing a fatty-oil substance as an impurity. The apparatus includes an electrolytic cell having a pair of inert electrodes. Therebetween is located a non-touching decomposable hydroxyl producing metal structure. A D.C. electric current is set up between the electrodes whereby the metal structure is decomposed to form a complex. The said complex combines with the fatty-oily substance.

Abstract: Method for the electrolytic decomposition of O/W emulsions in an electrolysis cell powered by direct current and device for carrying out this method.The invention is relative to the electrolytic decomposition of O/W emulsions in an electrolysis cell powered by direct current. The emulsions are decomposed according to the invention in a cell with at least one bundle of stable electrodes comprising one or more intermediate soluble metallic inlays in an acidic to alkaline range with a current consumption of 0.1 to 4 Ah/dm.sup.3 and a residence time of 2 to 360 min. in the cell as a result of coagulation and flotation. A device for carrying out this method is also described.

Abstract: The invention is relative to a method for the regeneration of neutral to alkaline cleaning and degreasing baths in an electrolysis cell powered by direct current. This method consists essentially in that soaps and emulsified constituents of the baths coagulate and float in a cell with at least one bundle of stable and/or soluble electrodes, whereby the bundle or bundles of stable electrodes comprise(s), if necessary, one or more interposed soluble metal inlays, in a neutral to alkaline range with a current consumption of 0.1 to 4 Ah/dm.sup.3 and a correspondingly predetermined residence time, and solids which are formed are filtered off as necessary. An ultrafiltration or fine filtration of the frothy stage drawn off is connected in afterwards for reclaiming tensides. A device for carrying out this method is also described.