Need details of a mineralizing unit for the conversion of distilled water into drinking water in a ship

Hello members,

I work on a ship. We generate distilled water from sea water for domestic use. However we can only use this water for bathing but it is not fit for drinking as it contains no mineral. Consuming this water causes immidiate and long term problems in humans. Can someone help me with a solution as to how to convert this water into drikong water. Can any minerals be added into the distilled water tanks or is there is protable mineralizing unit availble in the market which can be mounted on the supply line like aquaguard.