Patented method for making butanol with recombinant bacterium

Gail Donaldson of Newark Delaware and four others have been awarded United States patent 7,851,188 for their method of producing isobutanol. The isobutanol is produced under anaerobic conditions or with very limited oxygen. The microorganisms that make up the invention are predominantly bacteria with recombinant DNA. The bacteria have been modified for the purpose of producing products that have an unusually high percentage of butanol. The invention has the advantage of being able to utilize a variety of sugars and “renewable feedstocks such as cheese whey permeate, cornsteep liquor, sugar beet molasses, and barley malt.” The invention was assigned to Butamax(TM) Advanced Biofuels LLC of Wilmington, Delaware. Methods such as this one are promising because it appears to be an efficient way to produce butanol biologically. Biological production is ever increasing in its importance as fossil fuels become more challenging to acquire.

Donaldson butanol process

Donaldson butanol process