Announcements
  • A Call to AntarcticaOn March 10, 2009 at 13:43:19 French time, Skipper Rich Wilson and Great American III crossed the finish line at Les Sables d'Olonne. Race time: 121 days, 41 minutes and 19 seconds
  • Thank you for all of your kind notes, and for joining us on another educational adventure at sitesALIVE!

 


Desalination - Making Fresh Water

desalinatorGreat American III carries a limited amount of drinking water on board, so Rich uses a Katadyn POWERSURVIVOR 40-E desalinator to replenish his water supply. A desalinator is a piece of equipment that makes fresh water from salt water. The way the desalinaotor works is simple in principle, although complex on the molecular level. The salt water goes into the desalinator and is pressurized by the motor. The salt water is forced through what is called a "semi-permeable" membrane (water molecules can pass through but not salt molecules), and fresh water comes out the output. In a simplified (although not completely accurate) way, the salt is filtered out of the water.