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ISS ECLSS
Life support system for the International Space Station / From Wikipedia, the free encyclopedia
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The International Space Station Environmental Control and Life Support System (ECLSS) is a life support system that provides or controls atmospheric pressure, fire detection and suppression, oxygen levels, waste management and water supply. The highest priority for the ECLSS is the ISS atmosphere, but the system also collects, processes, and stores both waste and water produced and used by the crew—a process that recycles fluid from the sink, shower, toilet, and condensation from the air.
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![A flowchart diagram showing the components of the ISS life support system. See adjacent text for details.](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/SpaceStationCycle.svg/320px-SpaceStationCycle.svg.png)
The Elektron system aboard Zvezda and a similar system in Destiny generate oxygen aboard the station.[1] The crew has a backup option in the form of bottled oxygen and Solid Fuel Oxygen Generation (SFOG) canisters.[2] Carbon dioxide is removed from the air by the Vozdukh system in Zvezda, one Carbon Dioxide Removal Assembly (CDRA) located in the U.S. Lab module, and one CDRA in the U.S. Node 3 module. Other by-products of human metabolism, such as methane from flatulence and ammonia from sweat, are removed by activated charcoal filters or by the Trace Contaminant Control System (TCCS).[2]