Navigation Links
Microbes churn out hydrogen at record rate
Date:11/13/2007

By adding a few modifications to their successful wastewater fuel cell, researchers have coaxed common bacteria to produce hydrogen in a new, efficient way.

Bruce Logan and colleagues at Penn State University had already shown success at using microbes to produce electricity. Now, using starter material that could theoretically be sourced from a salad bar, the researchers have coaxed those same microbes to generate hydrogen.

By tweaking their design, improving conditions for the bacteria, and adding a small jolt of electricity, they increased the hydrogen yield to a new record for this type of system.

"We achieved the highest hydrogen yields ever obtained with this approach from different sources of organic matter, such as yields of 91 percent using vinegar (acetic acid) and 68 percent using cellulose," said Logan.

In certain configurations, nearly all of the hydrogen contained in the molecules of source material converted to useable hydrogen gas, an efficiency that could eventually open the door to bacterial hydrogen production on a larger scale.

Logan and lead author Shaoan Cheng announced their results in the Nov. 12, 2007, online version of Proceedings of the National Academy of Sciences.

"Bruce Logan is a clear leader in this area of research on sustainable energy," said Bruce Hamilton, NSF director of the environmental sustainability program at NSF and the officer overseeing Logan's research grant. "Advances in sustainable energy capabilities are of paramount importance to our nation's security and economic well-being. We have been supporting his cutting-edge research on microbial fuel cells for a number of years and it is wonderful to see the outstanding results that he continues to produce."

Other systems produce hydrogen on a larger scale, but few if any match the new system for energy efficiency.

Even with the small amount of electricity applied, the hydrogen ultimately provides more energy as a fuel than the electricity needed to drive the reactor. Incorporating all energy inputs and outputs, the overall efficiency of the vinegar-fueled system is better than 80 percent, far better than the efficiency for generation of the leading alternative fuel, ethanol.

Even most electrolysis techniques, methods to extract hydrogen from water using electricity, pale in comparison to the new method.

"We can do that by using the bacteria to efficiently extract energy from the organic matter," said Logan. By perfecting the environment for the bacteria to do what they already do in nature, the new approach can be three to ten times more efficient than standard electrolysis.


'/>"/>

Contact: Josh Chamot
jchamot@nsf.gov
703-292-7730
National Science Foundation  
Source:Eurekalert

Related biology news :

1. Hungry microbes share out the carbon in the roots of plants
2. Engineered eggshells to help make hydrogen fuel
3. NMR researchers unlock hydrogens secrets to spot polymorphism in pharmaceuticals
4. Scientists discover record-breaking hydrogen storage materials for use in fuel cells
5. Birth records hold pancreatic cancer clue
6. Researchers set new record for brightness of quantum dots
7. OHSU turns innovations into commercial opportunities at record pace
8. Fossil record supports evidence of impending mass extinction
9. Fossil record reveals elusive jellyfish more than 500 million years old
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Microbes churn out hydrogen at record rate
(Date:2/8/2016)... 2016 Worldcore is ... innovation for clients, comfort and unbeatable security, with ... --> Worldcore is the first EU-regulated ... comfort and unbeatable security, with a Voice Biometrics ... Worldcore is the first EU-regulated global payment ...
(Date:2/4/2016)... , Feb. 4, 2016 The ... apparently one of the most popular hubs of ... MetaHIT and other huge studies of human microbiota, ... past few years, the microbiome space has literally ... biomedical research. This report focuses on biomedical ...
(Date:2/3/2016)... February 3, 2016 --> ... research report "Automated Fingerprint Identification System Market by Component ... Application (Banking & Finance, Government, Healthcare, and Transportation) and ... the market is expected to be worth USD 8.49 ... between 2015 and 2020. The transformation and technology evolution ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... ... February 11, 2016 , ... Global ... treatment clinic in Quito, Ecuador. The new facility will provide advanced protocols and ... from around the world. , The new GSCG clinic is headed by ...
(Date:2/10/2016)... ASAE is introducing a hybrid membership model ... the option of joining or renewing through an organizational ... staff size, every employee in any size association or ... all available member benefits.   John H. ... options will allow organizations of any size and their ...
(Date:2/10/2016)... Austin, Texas (PRWEB) , ... February 10, 2016 ... ... research centers across three states, announced today the promotion of two long-standing principal ... and Chief of Family Medicine, Clinical Research and Development. , Dr. Laurence Chu, ...
(Date:2/10/2016)... ... February 10, 2016 , ... Curoverse announced ... On Azure, Arvados provides capabilities for managing and processing genomic and health data ... from major institutions collecting and analyzing genomic data,” said Adam Berrey chief executive ...
Breaking Biology Technology: