FIELD: chemistry.
SUBSTANCE: invention relates to a device and a method for electrochemical treatment of waste water in order to reduce chemical oxygen demand (COD). In order to reduce COD, waste water undergoes anodic oxidation in a device which has a first electrolytic bath which has a first type anode for oxygen release, connected in series or in parallel with a least one second electrolytic bath which has a second type anode for oxygen release. Material of the second type anode has higher oxygen overpotential than material of the first type anode. The first type anode is preferably based on synthetic diamond doped with boron and the second type anode preferably contains tin and antimony oxides.
EFFECT: higher degree of breakdown of substances which chemically consume oxygen (COD-substances) with simultaneous increase in current efficiency of the COD-substance oxidation reaction, which reduces expenses on electrical energy.
10 cl
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