METHOD FOR REMOVING IMPURITY BY COAGULATION IN WATER

摘要

PROBLEM TO BE SOLVED: To eliminate the need for special works such as the exchange of a metallic plate in electrolysis by dissolving a metal of a part for a current passage in water by the electrolysis and coagulating and floating impurity with aluminum hydroxide and iron hydroxide generated from the dissolved materials to remove. SOLUTION: Many aluminum can compressed bodies 2 are packed in a water treating vessel 1, a water inlet side electrode 4 and a water outlet side electrode 5 are arranged respectively in the vicinity of a water inlet 7 and a water outlet 8 of the water treating vessel 1 and an intermediate electrode 3 is arranged at the center. Objective water to be treated is filled up to a fixed water level 6 and positive voltage is impressed to the intermediate electrode 3 from a DC powder source while the objective water to be treated is introduced from the water inlet 7 and drawn from the water outlet 8. At this time, the electrode reaction occurs on a part of the surfaces of the aluminum can compressed bodies 2, which has no insulating film and faces the water inlet side electrode 4 or the water outlet electrode 5, to dissolve aluminum in water and the impurity is removed by coagulating aluminum hydroxide generated from the dissolved materials.