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Advanced microbial check valve developmentA flight certified assembly identified as a Microbial Check Valve (MCV) was developed and tested. The MCV is a canister packed with an iodinated anionic exchange resin. The device is used to destroy organisms in a water stream as the water passes through the device. The device is equally effective for fluid flow in either direction and its primary method of organism removal is killing rather than filtering. The MCV was successfully developed for the space shuttle to: disinfect fuel cell water; and prevent back contamination of the stored potable water supply. One version of the device consists of a high residual iodinated resin bed that imparts approximately 2 ppm of iodine to the fuel cell water as it flows to the potable water tanks. A second version of the device consists of a low residual iodinated resin bed. One of these low residual beds is located at each use port in the potable water system for the dual purpose of removing some iodine from the potable water as it is dispensed and also to prevent back contamination of the potable supply.
Document ID
19800024586
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Colombo, G. V.
(Umpqua Research Co. Myrtle Creek, OR, United States)
Greenley, D. R.
(Umpqua Research Co. Myrtle Creek, OR, United States)
Date Acquired
September 4, 2013
Publication Date
June 1, 1980
Subject Category
Man/System Technology And Life Support
Report/Patent Number
NASA-CR-163577
Accession Number
80N33094
Funding Number(s)
CONTRACT_GRANT: NAS9-15854
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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