Being the aeration device which is soaked in operational mannered null suffering treatment underwater of the aeration device and the seawater

摘要

PROBLEM TO BE SOLVED: To provide an aeration apparatus which can remove a deposit generated in slits of a diffuser membrane, a seawater flue gas desulphurization apparatus including the same, and an operation method of the aeration apparatus.SOLUTION: The aeration apparatus that is immersed in diluted used seawater, which is water to be treated, and generates fine air bubbles in the diluted used seawater. This aeration apparatus includes: an air supply line Lthat supplies air 122 through blowers 121A to 121D (four blowers) serving as discharge units; a pressure gauge 125 installed in the air supply line L; and aeration nozzles 123A each including the diffuser membrane 11 having slits for supplying the air, so that when air supply pressure exceeds a predetermined threshold value based on a result of measurement by the pressure gauge 125, supply of the air by the discharge unit is temporarily suspended.