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Microbiological Waste Treatment Processes In A Closed Ecology

Report Number: AMRL TDR 62-126
Author: Ingram, William T.
Corporate Author: Aerospace Medical Research Labs Wright-Patterson AFB Ohio
Laboratory: Biomedical Laboratory
Date of Publication: 1962-11
Pages: 192
Contract: AF 33(616)-7837
Project: 7164
Task: 716403
AD Number: AD0294480

Wastes treated in a closed ecological system are discussed according to the parameters affecting composition, quantity, and microorganisms expected in the wastes. Conventional waste treatment processes, activated sludge, trickling filters, and anaerobic digestion are discussed. Microbiological considerations including lists of organisms peculiar to each system and combination of systems are presented and discussed. Results of laboratory scale experiments of conventional systems receiving concentrated waste are evaluated. Using by-products of waste treatment processes (sludge, bacterial bodies) as nutritional supplements for plants, algae, or animals in a nutrient support system for man during an extended space trip is considered. Experimental volume and power requirements are projected to those applicable under space capsule conditions. Limitations imposed on the several systems for extended space travel indicate that solids should be stored and liquids processed by other than microbiological treatment systems for space flights of less than 1 year.

Lockheed Martin Missiles & Fire Control
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