How does Cornell’s filtration suit make urine safe to drink?

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Cornell's Filtration Suit Recycles Urine into Drinkable Water

Cornell University researchers have developed an undergarment system that transforms astronauts' urine into drinkable water, addressing a critical need for life support during extended space missions. This innovative system, inspired by science fiction "stillsuits," directly filters urine, purifying it for reuse. The prototype demonstrates a rapid purification rate, processing half a litre of urine into potable water in just five minutes.
Urine as a Water Source

Urine is composed of approximately 95 per cent water, making it a viable resource for recycling. The filtration system is designed to extract this water, rendering it safe for consumption. This process is crucial for reducing the logistical burden of carrying substantial water supplies on long-duration missions, where water is essential for drinking, cooking, and hygiene.
Filtration and Purification Technology

The new system functions as an undergarment featuring a collection cup integrated with a filtration unit. This unit purifies the collected urine, and the resulting clean water is then channelled to an internal storage bag. While specific details of the purification processes are not elaborated upon in the provided information, the core principle involves separating the water from other components in the urine.
Prototype Capabilities and Limitations

The initial prototype of this filtration suit weighs nearly 8 kilograms and requires a battery for operation. Despite its weight, it can purify 0.5 litres of water within a five-minute timeframe. This rate highlights the system's potential efficiency for immediate water recovery during missions, though further development would be necessary to assess its suitability for widespread use on extended voyages.
Relevance to Long-Duration Space Missions

The development of effective life support systems, including advanced water recycling, is fundamental for enabling long-duration space missions, such as those planned for the Moon and Mars. Current methods, like the maximum absorption garments used by astronauts, present discomfort and potential health risks such as urinary tract infections. This new filtration suit offers a more integrated and potentially more comfortable solution for astronauts operating far from Earth.

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How does Cornell’s filtration suit make urine safe to drink?

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