astronauts can now do away with oxygen cylinders. Scientists at the agency of industrial science and technology's National Institute for Resources and Environment have developed a battery that generates not only electricity but also oxygen. And the thing that makes it possible is common algae. During photosynthesis, like other plants algae releases oxygen. When the electrons that are passed around inside a plant cell during photosynthesis are directed outside to an electrode, you have a 'microbial battery'.
The prototype battery consists of a small culture tank filled with water, algae and an electron-transfer molecule that transports electrons from algae cells to one electrode. The battery also generates electrical energy in the dark as well as in the light. This special ability comes with a species of algae that not only photosynthesises, but also derives energy from sugar in its environment when there is no sunlight for photosynthesis. With the aid of 40 millilitres of water, 50 milligram of algae and 80 milligram of electron-transfer molecules, the battery produces 0.3 milliwatt of power in the presence of sunlight.
We are a voice to you; you have been a support to us. Together we build journalism that is independent, credible and fearless. You can further help us by making a donation. This will mean a lot for our ability to bring you news, perspectives and analysis from the ground so that we can make change together.
.png)
Comments are moderated and will be published only after the site moderator’s approval. Please use a genuine email ID and provide your name. Selected comments may also be used in the ‘Letters’ section of the Down To Earth print edition.