Providing clean drinking water for the astronauts on the International Space Station is a headache for engineers and mission planners. Water is heavy and humans consume many liters each day and sending water to the Space Station space is costly. Recycling is the obvious option but collecting sweat and urine and turning it into drinking water is a complex process that requires large machines and energy.
ISS astronauts could eventually be drinking their own pee cleaned via nanomembranes and proteins
