Hello Mr. Saba, ...
Published by Dr Harshvardhan Modak, Vice President, National Solid Waste Association of India, MD, Aquarion India,
Hello Mr. Saba,
Desalination waste as such does not contain caustic soda. It is merely sodium chloride solution (brine) with variety of other impurities. After removal of other impurities the brine, by electrolysis, needs to be converted into caustic soda.
Once that done, the caustic solution after evaporation & concentration can be converted into caustic.
Brine is important raw material for caustic industry.