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Scietists Say Seaweed Sugar Can Be Turned Into Energy - ( BORD...



uc photo - Scietists Say Seaweed Sugar Can Be Turned Into Energy Newest pictures
22.01.2012 22:25 EST
Scietists Say Seaweed Sugar Can Be Turned Into Energy
Energy experts believe that seaweed holds enormous potential as a biofuel alternative to coal and oil, and US-based scientists say they have unlocked the secret of turning its sugar into energy.
A newly engineered microbe can do the work by metabolizing all of the major sugars in brown seaweed, potentially making it a cost-competitive alternative to petroleum fuel, said the report in the US journal Science.
The team at the Berkeley, California-based Bio Architecture Lab engineered aform of E. coli bacteria that can digest the seaweed’s sugars into ethanol, it said.
Unlike other microbes before, researchers found it can attack the primary sugar constituent in seaweed, known as alginate. “Our scientists have engineered anenzyme to degrade and a pathway to metabolize the alginate, allowing us to utilize all the major sugars in seaweed, said Daniel Trunfio, chief executive at Bio Architecture Lab. The advance“makes the biomass an economical feedstock for the production of renewable fuels and chemicals,” he said. A company spokesman told the reporters that the lab currently has four aqua farming sites in Chile where it hopes to “scale up its microbetechnology as the next step on the path to commercialization” in the nextthree years.
Seaweed is seen as an appealing option for biofuel because, unlike corn and sugar cane, it does not use arable land and so does not compete with crops grown for food.
Less than three percent of the world’s coastal waters can produce enough seaweed to replace some 60 billion gallons of fossil fuel, according to background information in the article.
At peak production, seaweed could produce 19,000 liters per hectare annually, about twice the level of ethanol productivity from sugarcane and five times higher than theethanol productivity from corn.
Funding for the research came from the US Department of Energy’s Advanced Research Projects Agency, a grant from InnovaChile, and Norwegian oil giant Statoil.

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