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Composting of solid waste during extended human travel and habitation in space
1Department of Environmental Sciences, Rutgers University, New Brunswick, New Jersey 08903-0231, USA.
Abstract:
As part of a Controlled Ecological Life Support System (CELSS) for long term human travel and habitation in space, the resources in solid waste may be regenerated through the microbiological process of composting. This would release CO2 for photosynthetic uptake while transforming the waste to a smaller volume and weight of stabilized and sanitized compost. To continue the biodegradation and complete the cycling of nutrients, the compost would be incorporated into soil used in growing food crops. To minimize the weight and volume of the composting facility, the rate of the transformation should be maximized. This is realizable through ventilative removal of heat in reference to a biologically favorable temperature ceiling, and maintenance of a thoroughly oxygenated state. A preliminary design for a composting system for use in a spacecraft and/or permanent space station is proposed.
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