NASA Technical Reports Server (NTRS) : Space pdf

NASA Technical Reports Server (NTRS) : Space

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Description of the Book:

This report describes the MSFC space station water degradation study (WDS) and presents interim results from the first 24 months of testing. The WDS simulates the stagnant storage of water in distribution lines before the activation of the space station’s water processor by storing processed water at ambient temperature in valved sections of 1-in stainless steel and titanium tube. The WDS seeks to determine whether the water quality will degrade unacceptably and whether microbial growth will proceed to an unmanageable extent during extended stagnation. During the first 24 months, significant changes have occurred. Although iodine, which is used as a biocide, was nearly depleted within the first 6 months of testing, microbial growth has been minimal. This report describes the decrease in iodine concentration and the results of microbial and biofilm analyses. Increases in total organic carbon, iodide, chloride, nickel, iron, and chromium concentrations are presented and discussed.

The observed increase in conductivity and the decreases in pH and turbidity are also presented. The authors conclude that, with proper preparation, potable water can be stored under stagnant conditions without unmanageable degradation in water quality; a flushing operation and subsequent processing of the degraded water should render the water system ready for use

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 9/1/1995
• Year: 1995
• Book Topics/Themes: NASA Technical Reports Server (NTRS), BIODEGRADATION, MICROORGANISMS, POTABLE WATER, SPACE STATIONS, STAINLESS STEELS, TITANIUM, WATER QUALITY, ACIDITY, EXPOSURE, IODINE, TURBIDITY, Mcright, P. S., Roman, M. C

An excerpt captured from the PDF book