14 Apr '12, 2pm

Pond Biofuels Takes CO2 From Cement Kiln, Grows Algae And Turns It Into Biofuel

Pond Biofuels Takes CO2 From Cement Kiln, Grows Algae And Turns It Into Biofuel

To make cement, you cook calcium carbonate at high temperature, producing 4% of the world's carbon dioxide in two ways: through the fuel used to heat the kiln, and through the chemistry of converting calcium carbonate to lime and carbon dioxide. But as climate skeptics are so fond of telling us, plants love CO2. So Pond Biofuels set up shop next to St. Mary's Cement and feeds gases from its stack to algae taken from the nearby Thames River. The algae grows in its algae condos, sucking up sulphur and CO2 and emitting oxygen. The algae is then harvested, dewatered and processed. It can be turned into100 litres of biofuel per tonne of algae, or as is being done at St. Mary's right now, fed back into the cement plant to replace coal or coke. Tyler Hamilton of Clean Break and author of Mad Like Tesla filmed a tour of the Pond Biofuels demonstration project. He claims that it wa...

Full article: http://www.treehugger.com/renewable-energy/pond-biofuels-...

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