A real and emerging technology called osmotic power, also known as salinity gradient power, which is being developed in Japan and other countries.
- Technology Confirmed: Japan has launched what is described as Asia’s first osmotic power plant in the city of Fukuoka. This makes it the second such plant in the world, following a similar facility in Denmark.
- How it Works: The technology generates electricity by harnessing the natural energy released when freshwater and saltwater mix. A special membrane separates the two water types, and the resulting pressure from the water moving across the membrane can be used to drive a turbine and generate electricity.
- Current Scale: The facility is a pilot project with a modest output. It is expected to produce enough power to supply around 220 to 290 households annually and helps power a nearby desalination plant.
While the technology is a promising new source of clean, continuous energy, it is not yet a large-scale power solution that has “changed everything”. It still faces challenges related to membrane efficiency and costs.