Potable Water via a Gray Water Recycling System
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The Gray Water Recycling System (GWRS) is a gray water recovery technology currently in operation at the Sustainability Base building located at NASA Ames Research Center. The GWRS collects gray water from sinks and showers, recycles it and uses the purified water as toilet flush water in order to reduce water consumption. This technology is based on a coupled forward osmosis (FO) and a reverse osmosis (RO) technique. In this configuration, the FO membrane acts as a pretreatment system to the RO module allowing it to treat feed with high total dissolved solid content. In addition to this configuration, an ultra violet (UV) light disinfection system has been integrated into the GWRS. UV irradiation tests have been conducted and the results are promising regarding UV use in the system. The objective of this study is to demonstrate the applicability and long-term reliability of this technology for purifying gray water to potable standards. Product water, referring to water that has passed through the recycling system, has been monitored using different analytical methods. The results show that water recovered as product meets the Environmental Protection Agency’s (EPA) requirements for potable standards.
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Jaione Romero-Mangado, Science & Technology Corporation NASA Ames Research Center, USA
Tanner Pierce, Dynamac Corporation NASA Ames Research Center, USA
Auguste Nahas, Science & Technology Corporation NASA Ames Research Center, USA
Jurek Parodi, Science & Technology Corporation NASA Ames Research Center, USA
Kevin Howard, Wyle Labs NASA Ames Research Center, USA
Michael Flynn, NASA Ames Research Center, USA
The 45th International Conference on Environmental Systems was held in Bellevue, Washington, USA on 12 July 2015 through 16 July 2015.