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Key ecological challenges for closed systems facilities
Advances in Space Research, 2013Abstract Closed ecological systems are desirable for a number of purposes. In space life support systems, material closure allows precious life-supporting resources to be kept inside and recycled. Closure in small biospheric systems facilitates detailed measurement of global ecological processes and biogeochemical cycles.
Mark Nelson, William F Dempster
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Closed Ecological Recirculating Aquaculture Systems
Fisheries Science Series, 2017Closed habitation experiments are essential for global environment improvement and maintenance of self-sustaining ecosystems. Hydro-ecosystems, which utilize aquatic organisms, are a promising prospect in habitation experiments. The utilization of aquatic organisms in closed systems can essentially be divided into three parts: (1) cultivation of ...
Takeuchi Toshio
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Journal of Biological Education, 1994 Closed Ecological Systems (CES), i.e. biological systems closed to material but open to energy exchange, have been unexplored as biological tools. Only the investigations of bioregenerative Life Support systems For space missions have created some activity. However, these systems also have enormous potential applications on Earth.
Christian Tamponnet, Christopher Savage
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Microbial and higher plant biomass selection for closed ecological systems
Acta Astronautica, 1992A selection of higher plants and microbial strains is presented with its rationale in order to progressively regenerate food from waste in future space and planetary missions.
C Tamponnet
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Technical review of the Laboratory Biosphere closed ecological system facility
Advances in Space Research, 2004Laboratory Biosphere is a 40 m3 closed life system that commenced operation in May 2002. Light is from 12,000 W of high pressure sodium lamps over planting beds with 5.37 m2 of soil. Water is 100% recycled by collecting condensate from the temperature and humidity control system and mixing with leachate collected from under the planting beds ...
W F Dempster +2 more
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Eucaryote/procaryote ratio as an indicator of stability for closed ecological systems
BioSystems, 1983The eukaryote/prokaryote ratio permits immediate and direct estimation of ecological stability in closed microbial ecosystems as well as in natural systems. Previous research demonstrated partial pressure of oxygen can be used as a long term indicator of stability (Kearns and Folsome , 1981).
D C, Obenhuber, C E, Folsome
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Pressure, O2, and CO2, in aquatic Closed Ecological Systems
Advances in Space Research, 2013Abstract Pressure increased during net photosynthetic O2 production in the light and decreased during respiratory O2 uptake during the dark in aquatic Closed Ecological Systems (CESs) with small head gas volumes. Because most CO2 will be in the liquid phase as bicarbonate and carbonate anions, and CO2 is more soluble than O2, volumes of gaseous CO2 ...
Frieda B Taub, Anna K Mclaskey
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Journal of the Sanitary Engineering Division, 1965
Long term life support requires the use of a closed ecological system. The attainable degree of closure is determined by the extent of conversion achieved in the waste recovery system. Organisms used in such systems must be reliable, useful, and integrable.
William J. Oswald +2 more
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Long term life support requires the use of a closed ecological system. The attainable degree of closure is determined by the extent of conversion achieved in the waste recovery system. Organisms used in such systems must be reliable, useful, and integrable.
William J. Oswald +2 more
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Experimental Study of Nitrogen Fixation System in a Closed Ecological System
SAE Technical Paper Series, 1994<div class="htmlview paragraph">Nitrogen Fixation Systems(NFS) suitable for plant cultivation in a closed environment have been studied through experimental verification. The system is composed of physico-chemical processes only. Nitrogen gas and water are fed into the system as raw materials,and ammonia and ammonium nitrate solution are produced
Masatoshi Tsuji +5 more
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