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  • 1
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    Vacuum distillation/vapor filtration water recovery (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The development and evaluation of a vacuum distillation/vapor filtration (VD/VF) water recovery system are considered. As a functional model, the system converts urine and condensates waste water from six men to potable water on a steady-state basis. The system is designed for 180-day operating durations and for function on the ground, on zero-g aircraft, and in orbit. Preparatory tasks are summarized for conducting low gravity tests of a vacuum distillation/vapor filtration system for recovering water from urine.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-120303
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Development of an integrated, zero-G pneumatic transporter/rotating-paddle incinerator/catalytic afterburner subsystem for processing human waste on board spacecraft (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A baseline laboratory prototype of an integrated, six man, zero-g subsystem for processing human wastes onboard spacecraft was investigated, and included the development of an operational specification for the baseline subsystem, followed by design and fabrication. The program was concluded by performing a series of six tests over a period of two weeks to evaluate the performance of the subsystem. The results of the tests were satisfactory, however, several changes in the design of the subsystem are required before completely satisfactory performance can be achieved.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-114764
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Development of integrated, zero-G pneumatic transporter/rotating paddle incinerator/catalytic afterburner subsystem for processing human wastes on board spacecraft (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A four component system was developed which consists of a particle size reduction mechanism, a pneumatic waste transport system, a rotating-paddle incinerator, and a catalytic afterburner to be integrated into a six-man, zero-g subsystem for processing human wastes on board spacecraft. The study included the development of different concepts or functions, the establishment of operational specifications, and a critical evaluation for each of the four components. A series of laboratory tests was run, and a baseline subsystem design was established. An operational specification was also written in preparation for detailed design and testing of this baseline subsystem.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-114763
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Vacuum distillation/vapor filtration water recovery, phases 1 and 2 (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The research is reported on the development of an evaporator for vacuum distillation/vapor filtration VD/VF water reclamation system for use on manned space flights. The design, fabrication, and tests of a six-man evaporator are described. It is concluded that: (1) A condenser with an internal rotating impeller and coolant surfaces directly opposite the condensing surfaces is an effective condenser. (2) The VD/VF evaporator, catalyst unit and condenser function satisfactorily based on thermal, mechanical and recovery performance during a 145-hour evaluation test. (3) The quality of recovered water, as measured by analyses for total organic carbon, pH, conductivity, turbidity, and viable bacteria density was within established limits for potability.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-CR-124397 , NAS8-27467
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Vacuum distillation: vapor filtered-catalytic oxidation water reclamation system utilizing radioisotopes (1971)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The development of a functional model water reclamation system is discussed. The system produces potable water by distillation from the urine and respiration-perspiration condensate at the normal rate generated by four men. Basic processes employed are vacuum distillation, vapor filtration, vapor phase catalytic oxidation, and condensation. The system is designed to use four 75-watt isotope heaters for distillation thermal input, and one 45-watt isotope for the catalytic oxidation unit. The system is capable of collecting and storing urine, and provides for stabilizing the urine by chemical pretreatment. The functional model system is designed for operation in a weightless condition with liquid-vapor phase separators for the evaporator still, and centrifugal separators for urine collection and vapor condensation. The system provides for storing and dispensing reclaimed potable water. The system operates in a batch mode for 40 days, with urine residues accumulating in the evaporator. The evaporator still and residue are removed to storage and replaced with a fresh still for the next 40-day period.
    Keywords: CHEMISTRY
    Type: NASA-CR-125675 , GARD-1490-0900 , AMRL-TR-71-79
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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