Brown Seaweed
Production Posits New Biofuel Source
How would you like to be a seaweed picker? I bet you never
knew that job position even existed! Well it does off the coast of Chile, and
for good reason. Chilean aquafarms are harvesting abundant supplies of
naturally-growing brown seaweed as a way to produce a new source of biofuel.
Brown Seaweed Biofuel
Discovery
The recent development of an engineered microbe produced by
Berkeley-based scientists of Bio Architecture Lab, Inc. (BAL) does some amazing
things to brown seaweed. The enzyme's main contribution to science is its ability to
consume the sugars of brown seaweed and convert it into biofuel. In the race to
find more sustainable fuel sources to power our planet, biofuel is the new hope
for the future. This major advance in the fuel industry can change the course
of progression for the US.
Much like the E. coli bacteria from which the microbes were derived,
scientists have outfitted enzymes to attack the primary sugars of brown seaweed.
These primary sugars, called alginate, then metabolize into ethanol. Scientists
hope that this microscopic enzyme will become a biofuel alternative to oil and
coal, which are the predominate sources of fossil fuels.
Local Production
Efforts
According to recent studies, only three percent of our
oceans can produce enough seaweed to keep up with our fossil fuel demand.
Coastal Chile is the destination of four aquafarms, but the frigid waters of
Northern Pacific ports like Seattle and Portland are teeming with brown seaweed
as well. Oceanic plants are desirable as a source of renewable energy because they
don’t compete with any other crops used for food, such as corn and sugar cane.
Over the next three years energy experts hope to increase
the microbe technology in an attempt at commercialization. Research shows that
with enhanced production seaweed can produce twice the level of ethanol from
sugar cane and five times the amount of ethanol from corn. What’s even better
news is that land clearing for mass production of corn and cane sugar would
decrease if brown seaweed proved easier to harvest in a more contained
location.
Harvesting Brown
Seaweed
Because of the thousands of acres it takes to produce enough
corn and sugar cane to produce enough biofuel for our country’s demand, brown
seaweed harvesting takes the cake. Seaweed requires no watering or
fertilization. It doesn’t compete with food crops or require crop rotation, nor
does it require chemical enhancements. The naturally-occurring nutrients are
supplies by the ocean’s ecosystem, which appeals to eco-conscious consumers.
Beyond its use as a biofuel alternative, the modified E.
coli enzyme could be used to produce isobutanol as well.
Photo courtesy AFP.
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