Provided are a method and apparatus for producing potable water by post-processing (post-treating) desalined water obtained by desalination of seawater through distillation or reverse osmosis. The method includes a carbon dioxide absorption process (30) of excessively supplying carbon dioxide into the desalinated water to absorb the carbon dioxide, a remineralization process of passing the desalined water into which caibon dioxide is absorbed through a limestone filter (42) in which limestone is filled to form calcium ions and bicarbonate ions, and a caibon dioxide exhaust process (50) of supplying air into the desalinated water passed through the remineralization process to exhaust the carbon dioxide with the air to obtain the potable water. Therefore, a TDS concentration of the desaiinated water obtained through a distillation method or a reverse osmosis method can be effectively increased to produce potable water, alkalinity of the potable water can be increased to prevent corrosion of a water distribution system, and the potable water can be produced with a simplified apparatus and low cost.Linvention concerne un procédé et un appareil permettant de produire de leau potable grâce à un après-traitement deau dessalée obtenue par dessalement de leau de mer par distillation ou osmose inverse. Le procédé comprend un procédé dabsorption de dioxyde de carbone consistant à fournir de manière excessive de dioxyde de carbone dans leau dessalée afin dabsorber le dioxyde de carbone, un procédé de reminéralisation consistant à faire passer leau dessalée dans laquelle le dioxyde de carbone est absorbé à travers un filtre en calcaire, dans lequel le calcaire est rempli afin de former des ions calcium et des ions bicarbonate, et un procédé déchappement de dioxyde de carbone consistant à amener de lair dans leau dessalée passée à travers le procédé de reminéralisation pour laisser séchapper le dioxyde de carbone avec lair afin dobtenir de leau potable. Ainsi, une concentration T
