[foobarian]

I suppose I could store the salt water solution instead of throwing it away. Assuming I made ice cream often this would be acceptably frugal for me.

[bobthepanda]

Also, if you really want to recover the salt, you’d just have to boil away the water.

Alternatively, pickling is a perfectly good use of brine used for frugal purposes (extending the shelf life of produce, eggs, and what have you)

[AngryData]

Boiling is quick and convenient, but just evaporating the water out with ambient air is all but free.

[robotresearcher]

> Also, if you really want to recover the salt, you’d just have to boil away the water.

This is probably the point the poster was making: this requires a lot of energy. There's a lot of NaCl in the world, but getting it out of solution is expensive.

[bobthepanda]

If that’s a major concern, you can literally leave it in the sun like the other person suggested.