The purpose of this study is the generation of alkali and acidic seawater for improving the performance of a scrubber and the sterilization of ballast water by 2-room electrolysis. The experiment was carried out using 1-room and 2-room types of electrolysis. The volume ratio between the anode and cathode tanks was changed. Alkalinity, HClO concentration and survival ratio were measured. As a result, the HClO ratio was 45% in the 1-room electrolysis, whereas the HClO ratio in the cathode tank of the 2-room electrolysis was 80% or higher at any volume ratio. The survival ratio in the anode tank decreased with the volume ratio of this tank. The inactivation effect on halotolerance yeast in the 2-room type was higher than that in the 1-room type. An SEM morphology observation of the yeast after the electrolysis revealed that the cell wall was destroyed by the treatment.
