| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for separating oil from water by an electrolytic flotation method using electrolysis, in which scum formed by combining an eluted metal with oil in the liquid to be treated is recovered by floating the scum in the upper part of the liquid to be treated without precipitating the scum at the bottom of the liquid to be treated so that the stable performance of this apparatus can be kept while keeping the oil concentration in the treated liquid to be discharged below a preset value even if a treatment tank is not cleaned. SOLUTION: When oily water separation is performed by electrolyzing the liquid which is to be treated and is housed in a separation tank 13 by using at least a pair of positive/negative electrodes 15, minute air bubbles are supplied slowly to each of electrodes from a nozzle 33 from the lateral side of each of electrodes 15 so that minute air bubbles surround each of electrodes when the liquid to be treated is electrolyzed. COPYRIGHT: (C)2006,JPO&NCIPI
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