NASA’s design calls for using large plastic bags, made of forward-osmosis membranes, and filled with sewage for offshore harvesting of algae for bio-fuel. These plastic bags or enclosures will be made of the same membranes that NASA is currently exploring for recycling dirty water in space missions using forward-osmosis. NASA engineers would like to call it yet another example of using the technology developed for space travel, instead for making the “Spaceship Earth” more sustainable.
http://ecoworldly.com/2009/05/07/nasas-biofuel-proposal-off-shore-algae-harvesting-in-plastic-bags/
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