Saturday 12 December 2015

Lecture 5 – Desalination of Seawater

Conversion of sea water to drinking water:

Sea water can be converted to drinking water using simple distillation in large distillation plants. In this process, the sea water is boiled, the vapours are condensed and stored separately. This process separates the water content of the salty sea water. This process is called Desalination.

Figure 11 shows a block diagram of the desalination process









Figure 11:


Brine is a by-product of the desalination process. It is a concentrated solution of sodium chloride. It is electrolyzed to yield sodium hydroxide, hydrogen gas and chlorine.