13.6 Solar Salt Production
Solar salt is produced by the action of sun and wind on
seawater or natural brine in large ponds.
The water evaporates in successive ponds until the brine
is fully concentrated and salt crystallizes on the floor of
the crystallizing ponds. Solar salt plants must be located
in areas of low rainfall and high evaporation rates, and
where suitable low-cost is available.
Seawater contains about 3.5% (by weight) dissolved
minerals. Sodium chloride is 77%