Hybrid thermochemical processing: Fermentation of pyrolysis-derived bio-oil

Date
2011-01-01
Authors
Jarboe, Laura
Wen, Zhiyou
Choi, Dong
Brown, Robert
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Abstract

Thermochemical processing of biomass by fast pyrolysis provides a nonenzymatic route for depolymerization of biomass into sugars that can be used for the biological production of fuels and chemicals. Fermentative utilization of this bio-oil faces two formidable challenges. First is the fact that most bio-oil-associated sugars are present in the anhydrous form. Metabolic engineering has enabled utilization of the main anhydrosugar, levoglucosan, in workhorse biocatalysts. The second challenge is the fact that bio-oil is rich in microbial inhibitors. Collection of bio-oil in distinct fractions, detoxification of bio-oil prior to fermentation, and increased robustness of the biocatalyst have all proven effective methods for addressing this inhibition.

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This is a manuscript of an article from Applied Microbiology and Biotechnology 91 (2011): 1519, doi: 10.1007/s00253-011-3495-9. Posted with permission. The final publication is available at Springer via http://dx.doi.org/10.1007/s00253-011-3495-9.

Keywords
acetic acid, bio-oil, ethanol, furfural, inhibition, levoglucosan, food science and human nutrition, mechanical engineering
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