| 摘要 |
PROBLEM TO BE SOLVED: To prevent the lowering of the removal capacity of a nitrogen compound accompanying the lowering of outdoor air temperature and to efficiently remove phosphorus and nitrogen compounds by electrolytic treatment, in a sewage treatment equipment for removing phosphorus and nitrogen compounds. SOLUTION: Phosphorus and nitrogen compounds are removed using a nitrogen removing electrode constituted so that a cathode comprising a conductor including a metal material belonging to the Group Ib or IIb or a conductor coated with the metal material of the same Group and an anode comprising an insoluble metal material are paired, and a phosphorus removing metal wherein an electrode comprising an iron material or an aluminum alloy material is used as an anode and a cathode to constitute a pair of electrodes. Further, a plurality of electrode rows are formed wherein the nitrogen removing electrodes and the phosphorus removing electrodes are alternately arranged in the flowing direction of treated water in an electrolytic cell. COPYRIGHT: (C)2004,JPO
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