My secondary ex school teacher is working on a project in Lombok and she was asking for cheap and simple ways to filter seawater into drinkable freshwater and for useable purpose.

Reverse Osmosis is out of the question

Solar Oven and Solar stills were thought of, but is there any way to do it in a large scale?

they are a fishing village of ~3000 and have only access to an abundance of seawater with probably almost no electricty.

any ideas that are cheap and simple??

hey pewds you should mention charity water in every video to maximise awareness!