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Water:
A Critical Material
Enabling Space
Exploration
Karen D. Pickering
NASA Johnson Space Center
Houston, TX, 77058
Presentation Outline
Where is NASA going?
Why is water critical to NASA’s mission?
Recovering water from wastewater
Water quality for humans and hardware
Technology needs for exploration
8/12/14 Separation Science and Technology as a Convergence Platform
for SusChEM 2
Acronym Primer
ISS = International Space Station
WRS = Water recovery system
EVA = Extravehicular activity
8/12/14 Separation Science and Technology as a Convergence Platform
for SusChEM 3
So what is NASA really doing?
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8/12/14 Separation Science and Technology as a Convergence Platform
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Recovery of water from wastewater is an enabling
technology to explore beyond low Earth orbit
Open-loop life support system resupply mass 12,000 kg/person-year
(26,500 lbs/person-year)
Systems Maintenance 2.1%
Gases lost to space 2.1%
Crew Supplies 2.1%
Food (dry) 2.2%
Oxygen 2.5%
Water 89%
10,680 kg (23,545 lbs)
(2827 gallons)
Human life support requirements
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Human mass balance
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Water requirements change as mission
matures
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Urine Humidity
Condensate
International Space Station Recovered Wastewater
Wastewater on ISS
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Shower Water
Food
Laundry
Hand Wash
Shave
Oral Hygiene
Wastewater on a planetary surface
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8/12/14 Separation Science and Technology as a Convergence Platform
for SusChEM
RECOVERING WATER FROM
WASTEWATER
urine
50%
humidity
condensate
50%
International Space Station
Recycle urine and
humidity condensate
●Distillation
● Adsorption
● Ion exchange
●Catalytic oxidation
●Disinfection
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ISS Life Support Systems
13
8/12/14 Separation Science and Technology as a Convergence Platform
for SusChEM
Stored Water
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for SusChEM 14
On-orbit work with water containers
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Exploration Systems
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Technology for Exploration
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8/12/14 Separation Science and Technology as a Convergence Platform
for SusChEM
WATER QUALITY FOR HUMANS
AND HARDWARE
Drinking Water Quality on ISS
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Contaminant identification
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Polydimethylsiloxane (PDMS)
Dimethylsilanediol (DSMD)
trimethylsilanol dimethylsulfone
Metal silicate coating
Urine and solubility
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Urine solids on orbit
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What happens when you DON’T stabilize
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Tear Down and Inspection
NASA Sensitive But Unclassified (SBU)
Silicate
Blockage
Unused Drum
for Comparison
Corroded Braze Joint
Conclusions
Water impacts human health and safety in space
Hardware developers need help defining WHAT water
quality is required for their hardware
Water recovery enables American’s future space
exploration
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QUESTIONS
Thank you
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