Sugar or sunlight?
That's one of the fundamental questions for companies trying to transform algae into transportation fuel or dietary supplements. Solazyme says it will grow algae through fermentation--for instance, feeding the algae sugars in a heated, sealed environment.
"We're not growing it photosynthetically. We put it in stainless steel tanks similar to what you see in a brew pub," said Solazyme President Harrison Dillon.
By contrast, GreenFuel Technologies and LiveFuels will exploit the sun to grow the single-celled creatures. And here there is a divide, too. GreenFuel grows its algae in sealed, transparent tubes … Read more