electrode for electrochemical reduction of chemical oxygen demand of industrial waste

摘要

the present invention relates to an electrode in order to reduce the chemical oxygen demand of wastewater, which comprises: (a) a permanent component; and (b) a sacrificial component disposed face to face with the permanent component fixed removable and in electrical contact therewith.the permanent component is composed of a substrate of a metal valve provided with a catalytic coating containing noble metals or oxides with the sacrificial component containing elemental iron.the invention also relates to a process for the reduction of chemical oxygen demand in water containing residual oil compounds, paraffins, optionally glycol or residue, including casting, by an electrolytic process, involving the release of chlor (e) to the anode in the presence of iron (iii).the release of chlorine gas can be carried out on the surface of an anode consisting of a valve metal, permanent component activated catalytically coupled to a sacrificial component containing iron.