Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11027925 | Biomass and Bioenergy | 2018 | 10 Pages |
Abstract
n-Butanol is a chemical widely used in industry, with an approximate annual output of 4 million tons and a market valued at USD 8.6 billion. It was first produced by ABE fermentation (acetone - n-butanol - ethanol) at the beginning of the twentieth century using molasses as a substrate, an expensive raw material that made the process economically unfeasible. In this work, we developed a second-generation fermentation process using cellulosic sugar as the substrate. A strain of Clostridium saccharoperbutylacetonicum has been evolved to n-butanol resistance, and we have found that the addition of xylooligosaccharides to the culture medium leads to a significant increase in the n-butanol yield and productivity. As a result, an n-butanol titer of 12.5â¯g/L and a productivity of 0.43â¯g/L.h were obtained, a respective gain of 17% and 58% relative to the initial process. These advances indicate that second-generation technologies can make viable the production of renewable n-butanol.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
M.C.B. Grassi, M.F. Carazzolle, B.T. Nakagawa, A. Ferrari, S. Nagamatsu, C.R. Santos, M.T. Murakami, R.A.S. Pirolla, G.A.G. Pereira,