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Composting in advanced life support systems.

C F Atkinson1, J C Sager, M Alazraki

  • 1NASA, Kennedy Space Center, FL 32899, USA.

Acta Horticulturae
|September 7, 2001
PubMed
Summary
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Composting plant and food waste can support plant growth in space missions. This recycling method reduces waste volume and pathogen risks, decreasing reliance on resupply missions.

Area of Science:

  • Space exploration
  • Environmental science
  • Waste management

Background:

  • Extended space missions require efficient resource recycling to minimize resupply costs.
  • The National Aeronautics and Space Administration (NASA) is exploring waste recycling technologies for long-duration spaceflight.
  • Biologically based waste treatment systems are crucial for sustainable space exploration.

Purpose of the Study:

  • To evaluate the feasibility of composting solid wastes for space missions.
  • To determine the potential of compost leachate to support plant growth.
  • To assess the safety and efficacy of composting various waste streams, including human and food waste.

Main Methods:

  • Composting of plant wastes and analysis of leachate for plant growth inhibition.
Keywords:
NASA Center KSCNASA Discipline Life Support Systems

Related Experiment Videos

  • Composting of mixed solid wastes (plant, food, human) with inedible plant residues.
  • Microbiological assessment of composted waste for pathogen reduction.

    • Main Results:

    • Leachate from composted plant wastes did not inhibit seed germination.
    • Compost leachate provided sufficient inorganic minerals for plant growth.
    • Composting reduced waste volume and levels of potentially pathogenic microorganisms in mixed waste.

    Conclusions:

    • Composting is a viable method for recycling solid waste in space missions.
    • Finished compost can be used as a growth medium for plants and mushrooms.
    • Waste recycling through composting enhances the sustainability of long-duration space exploration.