Recent developments in water quality monitoring for Space Station reclaimed wastewatersThis paper discusses the recent developments in water quality monitoring for Space Station reclaimed wastewaters. A preprototype unit that contains an ultraviolet absorbance organic carbon monitor integrated with pH and conductivity sensors is presented. The preprototype has provisions for automated operation and is a reagentless flow-through system without any gas/liquid interfaces. The organic carbon monitor detects by utraviolet absorbance the organic impurities in reclaimed wastewater which may be correlated to the organic carbon content of the water. A comparison of the preprototype organic carbon detection values with actual total organic carbon measurements is presented. The electrolyte double junction concept for the pH sensor and fixed electrodes for both the pH and conductivity sensors are discussed. In addition, the development of a reagentless organic carbon analyzer that incorporates ultraviolet oxidation and infrared detection is presented. Detection sensitivities, hardware development, and operation are included.
Document ID
19880033880
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Small, John W. (Astro International Corp. Houston, TX, United States)
Verostko, Charles E. (NASA Johnson Space Center Houston, TX, United States)
Linton, Arthur T. (Hamilton Standard Management Services Houston, TX, United States)
Burchett, Ray (Phoenix Electrodes, Inc. Houston, TX, United States)