Wednesday, November 5, 2008

What can we expect from yeast for bioethanol commercial production?

For biofuel production from biomass, we want to robust microorganisms. Yeast is a traditional one but we need a yeast that has the ability to ferment both C5 and C6 sugar and more product tolerance.


Many scientists cross the world have been taking efforts to engineer yeast that can improve the speed and efficiency of ethanol production, which is a critical component to economically making biofuels a significant part of energy supply.


The 1st aspect is to engineer the yeast to ferment both C6 and C5 sugars by genetic modification. One of the example is the "Purdue yeast" developed by Nancy Ho.
The 2nd aspect is to engineer the yeast that has high-ethanol-tolerance. The typical example is the one developed by by MIT scientists (see http://web.mit.edu/newsoffice/2006/biofuels.html).

4 comments:

Unknown said...

Also there is a need to engineer microorganisms which can degrade lignin out of lignocellulose...what is your opinion on this??

Onedrop said...

Yes,I agree with you. There is a need for the engineered lignin-degrading microorganisms that can degrade lignin effectively in a short time under similar enyzymatic hydrolysis or/and fermentation conditions. As a result, the microorganisms can be used before and during enzymatic hydrolysis as bio-pulping process using ignin-degrading fungi prior to mechnical pulping. It should be able to speed up enzymatic hydroloysis and significantly reduce the enzyme loading due to the lignin competitive adsorption.

Unknown said...

Hey Tracy...the engineering of microorganisms (bacteria and fungi)for imparting them delignifying properties is not on the research-radar for some reasons. The research papers on this topic in last 15 years are countable.I dont know the reasons..if you can throw light on this...

Onedrop said...

Hi Michael,
Maybe because these research activities have been mostly driven by government policy and funding as well as industrial interests, i.e. where there is potential to get funding,where there will be researchers moving in.