Categories: Space Station

Ultimate Recycling on the ISS: Urine to Water

Right now, the crews on board the International Space Station consist of three people. But by late next year, the crew size will grow to six. That means more food, more water and ultimately more waste. But NASA has been working on a recycling system to transform urine and other liquid wastes into water that can be used in space for drinking, food preparation and washing. Agency officials say the water from the system will be cleaner than U.S. tap water. Not only does this help manage wastes on board the station, but its also a cost-saving measure. Water is heavy and launching it on board the shuttle or Progress re-supply ship is expensive.


The Water Recovery System recycles liquid wastes — which can consist of urine, sweat, or leftover water used for bathing or food preparation — by filtering it through a series of chemical processes and filters, making it safe to drink. Urine, for example, first passes through a distillation process to separate the liquid phase from the gaseous phase, after which it is mixed with other water waste and is treated with the help of a water processor.

After removing the remnant gaseous and solid phases, the liquid is filtered for additional purification and undergoes a high-temperature catalytic reaction, in order to destroy unwanted organic contaminants.

The system is scheduled to be brought to the ISS on the STS-126 mission, planned to launch this fall.

“Recycling will be an essential part of daily life for future astronauts, whether on board the space station or living on the Moon. Delivering this hardware is an important step in achieving the station’s full potential, allowing for additional crew members and more scientific research”, said NASA’s station program manager, Mike Suffredini.

Recycling will reduce the amount of consumables needed on board the space station by as much as 6,800 kilograms per year.

Original News Sources: Softpedia, USA Today

Nancy Atkinson

Nancy has been with Universe Today since 2004, and has published over 6,000 articles on space exploration, astronomy, science and technology. She is the author of two books: "Eight Years to the Moon: the History of the Apollo Missions," (2019) which shares the stories of 60 engineers and scientists who worked behind the scenes to make landing on the Moon possible; and "Incredible Stories from Space: A Behind-the-Scenes Look at the Missions Changing Our View of the Cosmos" (2016) tells the stories of those who work on NASA's robotic missions to explore the Solar System and beyond. Follow Nancy on Twitter at https://twitter.com/Nancy_A and and Instagram at and https://www.instagram.com/nancyatkinson_ut/

Recent Posts

The First Close-Up Picture of Star Outside the Milky Way

Like a performer preparing for their big finale, a distant star is shedding its outer…

7 hours ago

Here’s What We Know About Earth’s Temporary Mini-Moon

For a little over a month now, the Earth has been joined by a new…

9 hours ago

New Study Suggests Black Holes Get their “Hair” from their Mothers

Despite decades of study, black holes are still one of the most puzzling objects in…

9 hours ago

Gaze at New Pictures of the Sun from Solar Orbiter

74 million kilometres is a huge distance from which to observe something. But 74 million…

10 hours ago

Are Fast Radio Bursts Caused by Interstellar Objects Crashing Into Neutron Stars?

Astronomers have only been aware of fast radio bursts for about two decades. These are…

15 hours ago

Here’s How to Weigh Gigantic Filaments of Dark Matter

How do you weigh one of the largest objects in the entire universe? Very carefully,…

17 hours ago