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Physical/chemical closed-loop water-recycling for long-duration missionsWater needs, water sources, and means for recycling water are examined in terms appropriate to the water quality requirements of a small crew and spacecraft intended for long duration exploration missions. Inorganic, organic, and biological hazards are estimated for waste water sources. Sensitivities to these hazards for human uses are estimated. The water recycling processes considered are humidity condensation, carbon dioxide reduction, waste oxidation, distillation, reverse osmosis, pervaporation, electrodialysis, ion exchange, carbon sorption, and electrochemical oxidation. Limitations and applications of these processes are evaluated in terms of water quality objectives. Computerized simulation of some of these chemical processes is examined. Recommendations are made for development of new water recycling technology and improvement of existing technology for near term application to life support systems for humans in space. The technological developments are equally applicable to water needs on earth, in regions where extensive water ecycling is needed or where advanced water treatment is essential to meet EPA health standards.
Document ID
19910065919
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Herrmann, Cal C.
(NASA Ames Research Center; Bionetics Corp. Moffett Field, CA, United States)
Wydeven, Ted
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Man/System Technology And Life Support
Report/Patent Number
SAE PAPER 901446
Meeting Information
Meeting: Intersociety Conference on Environmental Systems
Location: Williamsburg, VA
Country: United States
Start Date: July 9, 1990
End Date: July 12, 1990
Accession Number
91A50542
Distribution Limits
Public
Copyright
Other

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