This is the winning sentence for me: Unlike some desalination systems, there is no accumulation of salt or concentrated brines to be disposed of.
Or is it? > In a free-floating configuration, any salt that accumulates during the day would simply be carried back out at night through the wicking material and back into the seawater, according to the researchers. This is fine for a small scale demonstration unit, but with bigger plants you will again run into the problem of over-salinating seawater, destroying the environment (and reducing your still's efficiency)…
The factor for me is that they are at least thinking about it. It feels as though the waste is an afterthought every time I read about desalination.