Navigation Links
Delft breakthrough in bioethanol production from agricultural waste
Date:11/20/2009

With the introduction of a single bacterial gene into yeast, researchers from Delft University of Technology in the Netherlands achieved three improvements in bioethanol production from agricultural waste material: 'More ethanol, less acetate and elimination of the major by-product glycerol' This week the invention was published in the scientific journal Applied and Environmental Microbiology.

Car fuel

Bioethanol is made by the yeast Saccharomyces cerevisiae from sugars obtained from plant biomass. This microorganism also converts such sugars into ethanol (alcohol) in beer and wine. The production of bioethanol is rapidly increasing due to the growing use of bioethanol as a car fuel. With an annual world production of 65 billion liters, bioethanol is aready the largest product of the fermentation industry

Second Generation

Bioethanol should of course preferably be produced from resources that do not compete with food production. For this reason, efforts are made to produce second-generation bioethanol, using agricultural residues such as wheat straw and corn stover. However, when the sugars from these raw materials are released, significant quantities of acetate are formed. Acetate can slow down or even halt bioethanol production by yeast.

Byproduct

Another challenge of the current bioethanol production process is that about 4% of the sugar is lost to formation of the byproduct glycerol. Glycerol formation was long considered to be an inevitable consequence of the production conditions during bioethanol production.

Yeast genes

TU Delft researchers have now solved these issues. Yeast can, at least in theory, also convert the harmful acetate to ethanol. As it turns out, just one single gene is missing in the yeast. By introducing a single gene from the bacterium Escherichia coli, researchers of the Netherlands-based Delft University of Technology and the Kluyver Centre for Genomics of Industrial Fermentation enabled this conversion of acetate to ethanol by yeast. This replaced the normal role of glycerol so efficiently that key genes in glycerol production could be removed, thus completely abolishing glycerol production.

Three-in-one

The invention is enthusiastically summarized by the principal researcher Jack Pronk: 'In the laboratory, this simple genetic modification kills three birds with one stone: no glycerol formation, higher ethanol yields and consumption of toxic acetate'.

For the potential billion liter ethanol gain to be realized, follow-up research on the transfer of this concept to industrial yeast strains and real-life process conditions is required. The Delft yeast researchers, who applied for a patent on their invention, hope to intensively collaborate with industrial partners to accelerate its industrial implementation.


'/>"/>

Contact: Ineke Boneschansker
i.boneschansker@tudelft.nl
31-152-788-499
Delft University of Technology
Source:Eurekalert

Related biology news :

1. New Delft material concept for aircraft wings could save billions
2. Breakthrough in fight against Hendra virus
3. Bio-optics breakthroughs: Highlights of medical and bioscience research at Frontiers in Optics 2009
4. Canadian research breakthrough holds promise for development of effective cancer therapies
5. Researchers achieve major breakthrough with water desalination system
6. Major breakthrough in early detection and prevention of AMD
7. Breakthrough made in assessing marine phytoplankton health
8. Breakthrough in radiotherapy promises targeted cancer treatment
9. Breakthrough in the treatment of bacterial meningitis
10. NEWSLETTER: Antibody Fragment Production Breakthrough with 2nd Generation EBA
11. Breakthrough made in energy efficiency, use of waste heat
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/30/2017)... -- The research team of The Hong Kong Polytechnic ... by adopting ground breaking 3D fingerprint minutiae recovery and matching technology, ... accuracy for use in identification, crime investigation, immigration control, security of ... ... A research team led by Dr ...
(Date:3/29/2017)... -- higi, the health IT company that operates the largest ... , today announced a Series B investment from BlueCross ... new investment and acquisition accelerates higi,s strategy to create ... health activities through the collection and workflow integration of ... and secures data today on behalf of over 36 ...
(Date:3/27/2017)... ROCKVILLE CENTRE, N.Y. , March 27, 2017 ... by Healthcare Information and Management Systems Society (HIMSS) ... Analytics Outpatient EMR Adoption Model sm . In ... top 12% of U.S. hospitals using an electronic ... recognized CHS for its high level of EMR ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... May 22, 2017 , ... NetDimensions has been ranked ... Research Globe™ for Corporate Learning, 2017. , Aragon Research defines Leaders as organizations ... effectively perform against those strategies. NetDimensions’ ranking as a Leader due to its ...
(Date:5/23/2017)... ... 2017 , ... Bacterial biofilms, surface adherent communities of bacteria that are encased ... food poisoning and catheter infections to gum disease and the rejection of medical implants. ... dollars per year, there is currently a paucity of means for preventing their formation ...
(Date:5/22/2017)... , ... May 22, 2017 , ... ... that it is exhibiting in booth B2 at the Association for Pathology ... 22-25. , In addition to demonstrating its Cancer Diagnostic Cockpit and Consultation ...
(Date:5/18/2017)... Mass. (PRWEB) , ... May 18, 2017 , ... ... the procedure on April 28, 2017 at the Prince Of Wales Private Hospital. ... cervical disc at level C6-C7. The patient failed conservative treatments prior to undergoing ...
Breaking Biology Technology: