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Algae: 'The ultimate in renewable energy'
Key Excerpts from Article on Website of CNN
Posted: April 10th, 2008
http://www.cnn.com/2008/TECH/science/04/01/algae.oil/
Texas may be best known for "Big Oil." But the oil that could some day make a dent in the country's use of fossil fuels is small. Microscopic, in fact: algae. Literally and figuratively, this is green fuel. "Algae is the ultimate in renewable energy," Glen Kertz, president and CEO of Valcent Products, told CNN while conducting a tour of his algae greenhouse on the outskirts of El Paso. "We are a giant solar collecting system. We get the bulk of our energy from the sunshine," said Kertz. Algae are among the fastest growing plants in the world, and about 50 percent of their weight is oil. That lipid oil can be used to make biodiesel for cars, trucks, and airplanes. Most people know algae as "pond scum." And until recently, most energy research and development projects used ponds to grow it. But instead of ponds, Valcent uses a closed, vertical system, growing the algae in long rows of moving plastic bags. The patented system is called Vertigro, a joint venture with Canadian alternative energy company Global Green Solutions. The companies have invested about $5 million in the Texas facility. "A pond has a limited amount of surface area for solar absorption," said Kertz. "By going vertical, you can get a lot more surface area to expose cells to the sunlight. It keeps the algae hanging in the sunlight just long enough to pick up the solar energy they need to produce, to go through photosynthesis," he said. Kertz said he can produce about 100,000 gallons of algae oil a year per acre, compared to about 30 gallons per acre from corn; 50 gallons from soybeans. Valcent research scientist Aga Pinowska said there are about 65,000 known algae species, with perhaps hundreds of thousands more still to be identified. A big part of the research at the west Texas facility involves determining what type of algae produces what type of fuel.
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