Science, Space and Technology News 2024
The new spacesuit urine filtration system by Cornell researchers recycles astronauts’ urine into drinkable water, aiming to improve comfort and efficiency on future Moon andCurrently, astronauts must relieve themselves inside their spacesuits during spacewalks. This is not only uncomfortable and unhygienic, but also wasteful.
Astronauts have also requested that the time needed to fill and de-gas the in-suit drink bags be reduced in future spacesuits and that a separate supply of non-caffeinated high-energy drinks be added.With all these objectives in mind, Etlin and colleagues have now designed a urine collection device, including an undergarment made of multiple layers of flexible fabric. This connects to a collection cup of molded silicone, to fit around the genitalia.
Once collected, the urine is diverted to the urine filtration system, where it gets recycled with an efficiency of 87% through a two-step, integrated forward and reverse osmosis filtration system. This uses a concentration gradient to remove water from urine, plus a pump to separate water from salt. The purified water is then enriched in electrolytes and pumped into the in-suit drink bag, again available for consumption. Collecting and purifying 500ml of urine takes only five minutes.
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