Osmosis

Imagine generating power not from sunlight or wind, but from the simple mixing of fresh and salt water. This is the promise of osmotic energy. The idea has been around for decades, but only now is it flowing into real-world use.

It's ironic that even when surrounded by water, sailors who are lost at sea can still die of thirst. The QuenchSea 3.0 portable desalinator is designed to keep that from happening, and it requires no power source other than its user's arm muscles.

Back in 2020 we told you about the QuenchSea, a foot-pump-powered portable device for desalinating sea water. Well, its makers are back with the QuenchSea Reel, which uses deep-ocean water pressure to do the same job.

NASA is exploring the use of a mostly non-mechanical life support system for use on spacecraft, known as Water Walls.

Hydration Technologies has developed a passive filtration system that creates a safe, clean drink from any contaminated groundwater without the use of power, pumping or chemicals.