Water recycling technologies developed for space are helping a parched American west
. Cosmonauts in the Russian segment of the ISS rely on a separate filtration system that only collects shower runoff and condensation and therefore require more regular water deliveries to keep their tanks topped off.In 2017, NASA upgraded the WPA with a new reverse-osmosis filter in order to, “reduce the resupply mass of the WPA Multi-filtration Bed and improved catalyst for the WPA Catalytic Reactor to reduce the operational temperature and pressure,” the agency announced that year.
One such improvement is the upgraded Brine Processor Assembly delivered in 2021, a filter that sieves more salt out of astronaut urine to produce more reclaimed water than its predecessor. But there is still a long way to go before we can securely transport crews through interplanetary space. NASA notes that the WPA that got delivered in 2008 was originally rated to recover 85 percent of the water in crew urine though its performance has since improved to 87 percent.
When the post-processed urine is then mixed with reclaimed condensation and runs through the WPA again, “our overall water recovery is about 93.5 percent,” Layne Carter, International Space Station Water Subsystem Manager at Marshall. To safely get to Mars, NASA figures it needs a reclamation rate of 98 percent or better.
But even if the ISS’s current state-of-the-art recycling technology isn’t quite enough to get us to Mars, it’s already making an impact planetside. For example, in the early 2000’s the Argonide company developed a “NanoCeram” nanofiber water filtration system with NASA small business funding support.
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