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Investigation of Silver Biocide as a Disinfection Technology for Spacecraft-An Early Literature ReviewAn ideal spacecraft water disinfection system should prevent or control microbial growth, inhibit or prevent biofilm formation, and prevent microbial-induced corrosion. In addition, the selected biocide system should be chemically compatible with materials used in the water storage and distribution system, have minimal maintenance requirements, especially for long-duration missions, and should be safe for crew consumption at levels appropriate for biocidal control. Silver ion is a proven broad spectrum biocide. There has been an increased interest in the biocidal function of silver, both due to its potential to control biocide resistant species and due to advances in silver and nanosilver biocide technologies. NASA is considering silver as the future biocide for exploration over the iodine biocide system. In order to select and design a successful silver biocide delivery system to meet NASA's requirements, it is essential to understand the advantages and disadvantages of moving to a silver disinfection system. To enhance the knowledge base for the application of silver biocides in spacecraft water systems, this paper provides a first compilation of review data related to: (1) Silver as a biocide technology, (2) Options and concepts for silver biocide delivery, and (3) Silver biocide compatibility studies for spacecraft systems.
Document ID
20180005617
Document Type
Conference Paper
Authors
Li, Wenyan (URS Federal Technical Services, Inc. Germantown, MD, United States)
Calle, Luz M. (NASA Kennedy Space Center Cocoa Beach, FL, United States)
Hanford, Anthony J. (Jacobs Technology, Inc. Houston, TX, United States)
Stambaugh, Imelda C. (NASA Johnson Space Center Houston, TX, United States)
Callahan, Michael R. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
September 26, 2018
Publication Date
July 8, 2018
Subject Category
General
Report/Patent Number
ICES-2018-82
KSC-E-DAA-TN57395
Meeting Information
International Conference on Environmental Systems(Albuquerque, NM)
Funding Number(s)
CONTRACT_GRANT: 80KSC017C0012
CONTRACT_GRANT: NNJ13HA01C
Distribution Limits
Public
Copyright
Public Use Permitted.

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