Only innovating on price, not on dealing with the toxic brine dumped into the shores (ocean shores are a bio-diverse eco-system in itself, that you can't find in the rest of the ocean).
I wonder if this is not done because it's expensive (maybe brine corrosion requires expensive pipes), or because governments will simply do nothing until there is public outcry (unlikely to happen in Saudi Arabia, they would need international pressure).
I'm picturing something that looks like mine tailings.
Possibly the stuff could be sold as pavement salt for cold climate markets. Depends on how dirty it is I suppose.