September 27, 2006

Microdiesel: Bacteria engineered to produce biodiesel

Add another word to your vocabulary - "microdiesel" - as in biodiesel fuel produced by using micro-organisms engineered for fuel production. Like enzymatic and bacterial catalysts mentioned elsewhere on this blog, this new process expands the range of feedstock that can be employed in biofuel production.

Thanks to Biopact for identifying the online reports on this technology. Use the links here for more details.

New Fuels from Bacteria
from Science Daily

A breakthrough in the production of biofuels has been developed by scientists in Germany. Research published in the September 2006 issue of Microbiology, a Society for General Microbiology journal, describes how specially engineered bacteria could be used to make fuel completely from food crops.

Microdiesel, as the scientists have named it, is different from other production methods because it not only uses the same plant oils, but can also use readily available bulk plant materials or even recycled waste paper if engineering of the production strain is more advanced.

Also, it does not rely on the addition of toxic methanol from fossil resources, like many other biodiesels. The bacteria developed for use in the Microdiesel process make their own ethanol instead. This could help to keep the costs of production down and means that the fuel is made from 100% renewable resources.

"Due to the much lower price of the raw materials used in this new process, as well as their great abundance, the Microdiesel process can result in a more widespread production of biofuel at a competitive price in the future", says Professor Steinb├╝chel.

technorati , , , , ,

1 comment:

Anonymous said...

Spanish company touts process to turn urban waste into biodiesel

Patented in 2005 by Francisco Angulo

By Ron Kotrba

A group of Spanish developers working under the company name Ecofasa, headed by chief executive officer and inventor Francisco Angulo, has developed a biochemical process to turn urban solid waste into a fatty acid biodiesel feedstock. "It took more than 10 years working on the idea of producing biodiesel from domestic waste using a biological method," Angulo told Biodiesel Magazine. "My first patent dates back to 2005. It was first published in 2007 in Soto de la Vega, Spain, thanks to the council and its representative Antonio Nevado."

Using microbes to convert organic material into energy isn't a new concept to the renewable energy industries, and the same can be said for the anaerobic digestion of organic waste by microbes, which turns waste into biogas consisting mostly of methane. However, using bacteria to convert urban waste to fatty acids, which can then be used as a feedstock for biodiesel production, is a new twist. The Spanish company calls this process and the resulting fuel Ecofa. "It is based on metabolism's natural principle by means of which all living organisms, including bacteria, produce fatty acids," Angula said. "[It] comes from the carbon of any organic waste."

He defined urban waste as "organic wastes from home like food, paper, wood and dung," and added that any carbon-based material can be used for biodiesel production under the Ecofa process. "For many years, I wondered why there are pools of oil in some mountains," he said, explaining the reasoning behind his invention. "After delving into the issue, I realized that [those oil deposits] were produced by decomposing organic living microorganisms." This, in Angulo's mind, sparked the idea that food waste and bacteria could be turned into fatty acids that could react into biodiesel. Two types of bacteria are under further development by Biotit Scientific Biotechnology Laboratory in Seville, Spain: E. coli and Firmicutes. The Ecofa process also produces methane gas, and inconvertible solids that can be used as a soil amendment or fertilizer. "There is a huge variety of bacteria," Angulo said. "Currently, [biodiesel producers] receive a fat that must be processed through transesterification into biodiesel, but we are also working on other types of bacteria that are capable of producing fatty acids with the same characteristics as biodiesel." He said this would eventually allow producers to skip the transesterification step.

Ecofasa may avoid the ongoing food-versus-fuel debate and its expected successor, indirect land use, with its Ecofa process. "It would not be necessary to use specific fields of maize, wheat, barley, beets, etc., which would remain for human consumption without creating distortions or famines with unforeseeable consequences," the company stated in a press release. "This microbial technique can be extended to other organic debris, plants or animals, such as those contained in urban sewage. You can even experiment with other carbon sources, and this opens up a lot of possibilities. It is only necessary to find the appropriate bacteria."

The company created its name by combining the term "eco-combustible" with F.A., the initials of the inventor.

"Today we feel that we can produce between one and two liters [of biodiesel] per 10 kilograms of trash," Angulo said. That's a little more than one-fourth to one-half of a gallon for every 22 pounds of trash—or between 24 and 48 gallons per ton of urban waste. "We are working to improve that," he said.

Francisco Angulo