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Anaerobic Treatment of Organic Wastes from Controlled Ecological Life Support Systems
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Abstract
This paper describes the results of a project involving an anaerobic digestion system used in treating the human and vegetative wastes from a Controlled Ecological Life Support System (CELSS). The anaerobic digester biologically breaks down the organic matter in the wastes into a mixture of methane gas and carbon dioxide, while significantly reducing the BOD(biological oxygen demand ) of the wastewater. A standard waste was formulated consisting of a mixture of swine waste (the surrogate for human feces and urine), green wastes (primarilly lettuce), and paper wastes. The equipment used for this project was a 2.7 cubic meter digester tank filled with plastic media and heated to an average temperature of 35°C. The digester was run over period of 200 days and loaded on the average of five days per week. The results over this test period showed a 94% reduction in BOD and a 98% reduction in suspended solids in the wastewater. Biogas production was approximately 1 cubic meter of biogas per kg of BOD added to the digester per day. This biogas contained an average of 62% methane. Tests were carried out at Lockheed in Sunnyvale to determine the effectiveness of the digester effluent as a growth medium for vegetables in a hydroponic growing system.
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Williams, D., Kull, R., and Schwartzkopf, S., "Anaerobic Treatment of Organic Wastes from Controlled Ecological Life Support Systems," SAE Technical Paper 921272, 1992, https://doi.org/10.4271/921272.Also In
References
- Babcock, R. Williams D. W. Stepanek P. Montecalvo J. 1989 “Pilot Scale Methane Production from Culled Tomatoes.” ASAE Paper No. 89-6085 International Summer Meeting of the ASAE St. Joseph, Michigan
- Bortone, G. Piccinini S. 1988 “A Full Scale Upflow Anaerobic Filter Treating Pea, Maize, and Green-Pea Processing Wastes.” Proceedings 5th International Symposium on Anaerobic Digestion Bologna, Italy
- Cullingford, H. S. Schwartzkopf S. H. 1990 “Conceptual Design for a Lunar-Base CELSS” SAE Technical Paper Series 901278 20th Intersociety Conference on Environmental Systems Williamsburg, Virginia
- Day, Don 1992 Unpublished Data University of Illinois, Agricultural Engineering Department Urbana
- Gunnerson, C. G. Stuckey D. C. 1986 “Integrated Resource Recovery: Anaerobic Digestion, Principles and Practices for Biogas Systems.” World Bank Technical Paper No. 49, UNDP Project Management Report No. 5 New York, N.Y
- Jewell, W. J. et al. 1982 “The Feasibility of Biogas Production on Farms.” Report No. XB-0-9038-1-10 Department of Agricultural Engineering, Cornell University Ithaca, N.Y
- Fifth International Symposium on Anaerobic Digestion 1988 Proceedings and Poster Session Papers Bologna, Italy
- Stroup, T. Schwartzkopf S. Marchin G. L. 1991 “Iodine Microbial Control of Hydroponic Nutrient Solution” SAE Paper No. 911490 Regenerative Life Support Systems and Processes NASA Publication Washington, D.C
- Taigenides, E. D. Hazen T. E. 1966 “Properties of Farm Animal Excreta.” Transactions of the ASAE 374 376
- Wydeven T. Golub M. A. “Generation Rates and Chemical Compositions of Waste Streams in a Typical Crewed Space Habitat.” NASA Technical Memorandum 102799 Ames Research Center Moffett, Field, California