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CC: Using Algae To Fight Climate Change

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    Message 1 of 1 , Sep 30, 2007
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      By Julio Godoy
      September 29, 2007


      BERLIN - Research into the use of algae to capture carbon dioxide from the
      air is changing the negative reputation of these organisms, often seen as a
      plague associated with agricultural fertiliser run-off.

      Until very recently, the proliferation algae was interpreted as an
      undesirable consequence of the overuse of agro-chemicals, whose immediate
      results included skin irritation in humans and the death of aquatic fauna
      from lack of oxygen.

      But their potential for absorbing one of the principal greenhouse gases --
      which cause global climate change -- could be crucial for avoiding
      environmental catastrophes. Like terrestrial plants, the algae consume
      carbon during photosynthesis.

      "We took algae from the ocean, we put it in plastic containers in
      greenhouses, where we fed it with carbon dioxide produced by conventional
      electric generators," explained Laurenz Thomsen, a bio-geologist from Jacobs
      University in the northern German city of Bremen.

      "Exposed to solar light, the algae transform the carbon dioxide into biomass
      that can later be used as biodiesel, whose combustion doesn't emit
      greenhouse gases," he added.

      The Greenhouse Gas Mitigation Project (GGMP)
      <http://www.irccm.de/greenhouse/project.html> is coordinated by Thomsen,
      with cooperation from the Bremen polytechnic university, the Alfred Wegener
      Institute for Marine Research, and several companies, including the European
      electricity supplier E.ON.

      Thomsen has dubbed the small greenhouse "Algenreactor", set up at Jacobs
      University, where the algae transform carbon dioxide into organic fuel. The
      project is operating at the experimental phase, producing just a half-litre
      of biofuel.

      "The diesel that we refine here is absolutely organic. It satisfies the
      European standards. I'm confident that we will be able to move on to an
      industrial phase in the coming months," he added.

      Fritz Henken-Mellier, director of the Farge thermoelectric plant just
      outside Bremen, agrees with that prediction. Some of the carbon dioxide
      emissions from this coal-fired generator were captured by GGMP.

      "Surely we need to build a much bigger greenhouse, covering hundreds of
      square metres, so that the capture of carbon dioxide and the production of
      biofuel correspond to the scope of a commercial energy plant," he said in an
      interview for this report.

      Henken-Mellier calculates that "the capture of just 10 percent of the gases
      emitted by the Farge plant means a reduction of 600 tonnes daily of carbon

      According to Thomsen, the area of a greenhouse capable of absorbing the
      carbon dioxide from a 350-megawatt electrical plant and transforming it into
      biofuel would have to be 25 square kilometres and would cost some 480
      million dollars.

      The sum is small compared to the cost of conventional crops to produce
      biofuel and reduce toxic gases at a scale similar to that of the
      "algae-based reactor." An equivalent planting of rapeseed, for example,
      could cost as much as 25 times more.

      But Thomsen's project doesn't convince everyone. "Those calculations are
      very ingenuous," said Karl-Herrman Steinberg, director of one of Europe's
      leading algae producers, located in the northern German city of Kloetze.

      "The costs of growing algae, the elimination of the water and distillation
      of the combustible oil are very high for this to be profitable on an
      industrial scale," said Steinberg.

      Thomsen admits that the location of the greenhouses should be decided based
      on available sunshine. In northern Germany, with relatively few hours of
      sunlight, the model would not work. "The greenhouses would have to be built
      in the south and southeast of Europe," he said.

      "We are already negotiating with German and foreign firms, from Brazil and
      India, which manage large algae crops," he added.

      The GGMP is not the only project of its kind. During the first global oil
      crisis, in the 1970s, U.S. scientists came up with a similar process for
      transforming algae into biofuel. But the attempt was abandoned in 1996, when
      low oil prices erased the incentives to study organic fuels.

      Now, with the current energy and environmental crisis, the U.S. company
      GreenFuel <http://www.greenfuelonline.com/>, in the north-eastern state of
      Massachusetts, is planning a greenhouse to cover at least one square
      kilometre for 2009.

      Isaac Berzin, of GreenFuel, says that to capture the carbon dioxide released
      by a 1,000 gigawatt generate would require an algae greenhouse between eight
      and 16 square km, which could produce more than 150 million litres of
      biodiesel and 190 million litres of ethanol.


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      NewHeavenNewEarth (NHNE)
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