Performance Characterization of water Recovery and water Quality from Chemical/Organic Waste Products 891509

Water reclamation subsystems currently being evaluated for the Space Station Freedom are designed primarily to reclaim water from waste streams containing low to moderate levels of organics/inorganics, including chemical additives to control microorganism proliferation. Wastes containing high organic content (solids), especially those containing chemical and bioprocess fluids, present potential risks for compromising operational integrity of these subsystems. Looking beyond near-term needs to reclaim water from primarily crew-derived waste streams, refurbishment and process characterization of a waste water management system capable of processing wastes containing high concentrations of organic/inorganic materials has been initiated. The process combines low temperature/pressure to vaporise water with high temperature catalytic oxidation to decompose volatile organics. The reclaimed water is of potable quality and has a high potential for maintenance under sterile conditions. The results from preliminary experiments and procedures to characterize the system, modifications in process and equipment required to control reliability, and repeatability of system operation are presented. The objective is process water quality rather than quantity. The combined potential for incineration of solids to reduce solid waste storage requirements while recycling reformed gases and recycling inorganics is also discussed.


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