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SunOpta Announces System Sale to Celunol for Cellulosic Ethanol Demonstration System

Celunol’s cellulosic ethanol process. Click to enlarge.

SunOpta Inc. has sold a continuous process system, including SunOpta’s patented and proprietary biomass conversion technology, to Celunol (formerly BC International) for Celunol’s cellulosic ethanol commercial demonstration facility in Jennings, Louisiana. Terms of the sale were not disclosed.

The SunOpta Bioprocess Group has been designing, building, and optimizing biomass conversion plants for more than thirty years. End products include cellulosic ethanol, cellulosic butanol, xylitol, and dietary fibre for human consumption. Raw materials include wheat straw, corn stover, grasses, oat hulls, wood chips, and sugarcane bagasse.

Current approaches for the production of cellulosic ethanol requires a multi-step process that involves pre-treatment of the biomass prior to its enzymatic hydrolysis to provide the C5 and C6 sugars for subsequent fermentation to ethanol (or butanol). SunOpta provides pre-treatment solutions, and, in partnership with other companies—such as Celunol—cellulosic biofuel production facilities.

The combination of SunOpta and Celunol process technologies will lead to a very competitive solution for producing cellulosic ethanol from various biomass substrates. We are excited to be working with Celunol on the first commercial cellulosic ethanol plant in the United States and look forward to the massive grow out in this market.

—Murray Burke, VP and General Manager, SunOpta BioProcess Group

In June, SunOpta announced the sale of a cellulosic ethanol demonstration facility to China Resources Alcohol Corporation (CRAC) and a Joint Development Agreement with CRAC and Novozymes for the development of cellulosic ethanol in the People’s Republic of China. (Earlier post.)

SunOpta is also supplying its steam explosion equipment and process technology to a subsidiary of Abengoa for its commercial production facility that converts cereal straw into ethanol. (Earlier post.)

Celunol is a privately held company headquartered in Dedham, Massachusetts moving rapidly to commercialize its proprietary technology for producing ethanol from a wide array of cellulosic biomass feedstocks, including bagasse, agricultural waste, wood products and dedicated energy crops.

The key element of Celunol’s technology is genetically engineered Escherichia coli bacteria that can ferment both C6 (hexose) and C5 (pentose) sugars present in cellulosic biomass. (Numerous research efforts around the world are tackling the same problem using different modified organisms such as Zymomonas, Saccharomyces, Lactobacillus, xylose-assimilating yeasts and Clostridium in addition to E. coli.)

E. coli ferments a range of sugars: arabinose, glucose, mannose and xylose. However, wild strains produce a range of fermentation products, but little ethanol. A recombinant E. coli for converting pentose sugars to ethanol was first developed in 1987.

Problems with the bacteria include the pH range for fermentation and the need to withstand the harsh production environment.

Celunol operates a laboratory at the Sid Martin Biotechnology Development Incubator of the University of Florida—from which Celunol has licensed technology—and a research laboratory and pilot plant in Jennings, Louisiana. Celunol has also benefited from targeted sponsored research at the University of Florida, Dartmouth College, Auburn University, the University of Colorado and the University of California (Davis).

The company is currently completing an expansion of the Jennings pilot facility and is moving forward to construct a demonstration plant based on its technology later this year. Celunol aspires to develop and build a portfolio of ethanol facilities in the US and abroad. Shareholders in the company include Braemar Energy Ventures, Charles River Ventures, Khosla Ventures, and Rho Capital Partners.




"The SunOpta Bioprocess Group has been designing, building, and optimizing biomass conversion plants for more than thirty years."

Oh, if we had just started on this 30 years ago....


Ethanol and Butanol have been in production for many years. 6 billion tonnes of Butanol produced last year. The problem is that industry has been willing to pay $5-$6 a gallon for Butanol because of what it can do, it's a very good industrial solvent. The price precluded it from being used as a fuel, which in turn limited the need for innovation. When they figure out how to make Butanol cheaper, it will give gasoline a run for it's money. Butanol has all the good properties of Petro with almost none of the bad.

John Ard

Except for poor cold-starting ability. Yep, I just had to burst your bubble. It's an easily remedied problem, though.


It is probably 6 MILLIONS tonnes of butanol...


I just read a technical paper that says you can use celluse ethanol processes and then take the hemicellulose and lignin that is left, gasify into syngas and use organisms to make more ethanol. This would effectively double the yeild of ethanol per dry biomass ton.

David Linstrom

can you post a link to that article?


Dear sir(s)
Su-babool.Specie-Leucocephla L. Leguminosae (Native Plants of Mexico also called Ku-babool or KOO-babool.
Fast growing.
Contains Pentoses, Hexoses Monosaccharides,Hemicellulose &
I wonder should it not be suitable for recovery of Cellulosic -Ethanol ? in contrast to Eucalyptus(Myrtle, Native of Australia)Leguminosae?

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