[tenuousemphasis]

The problem as I understand with desalinization is what to do with the salty brine that remains?

[bequanna]

Why not just put it back into the ocean? Obviously, some distance away from your inlet.

[eesmith]

https://en.wikipedia.org/wiki/Desalination#Outflow . In short, it needs treatment due to contaminants, and diffusion or dilution because high salt concentrations damage the ecosystem.

These can be managed, but it's not "just" a matter of pumping the outflow directly back into the sea.

[tenuousemphasis]

Because that kills anything near the output, and changes the surrounding ecosystem.

[adgjlsfhk1]

Even better: extract lithium and deuterium and then pump it back.