Patent ID: 7678238
Filing Date: 2010-03-16
Classification: C02F

Abstract:
1. A method for underwater decomposition of organic content of aqueous waste solutions, involving the measurement and, if necessary, the adjustment by means of a pretreating solution of the pH and electric conductivity of the solution, maintaining optimum pH and/or electric conductivity during the process, and further involving the total or partial decomposition of organic content of the solution, comprising: submerging electrodes including a working electrode and an auxiliary electrode into the solution, and producing and maintaining an electric arc between the electrodes and the electrically conductive solution by applying electric current of at least 0.5 A/cm decomposing the organic content of the solution into water, carbon dioxide, and nitrogen, wherein the total surface area of the working electrode is smaller than the total surface area of the auxiliary electrode, and plasma is generated close to the working electrode where the current density is higher.