| Description |
1 online resource (1 page) : color illustrations. |
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text txt rdacontent |
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computer c rdamedia |
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online resource cr rdacarrier |
| Series |
NREL/PO ; 5100-73786 |
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NREL/PO ; 5100-73786.
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| Note |
"19th Sympsium on Biotechnology for Fuels and Chemicals, April 28-May 1, 2019, Hyatt Regency Seattle, Seattle, WA." |
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"Funding provided by the US Department of Energy, Bioenergy Technologies Office." |
| Bibliography |
Includes bibliographical references. |
| Funding |
DE-AC36-08GO28308 |
| Note |
Description based on online resource, PDF version; title from caption (NREL, viewed July 15, 2020). |
| Summary |
Butyric acid is a valuable chemical that can be fermentatively produced in Clostridium tyrobutyricum and catalytically upgraded to drop in biofuels. Despite considerable study of glucose fermentation in C. tyrobutyricum, information about glucose and xylose co-fermentation to produce butyric acid is limited. In this work, fed-batch fermentations of corn stover hydrolysate at pH 5.0 demonstrated the co-fermentation of glucose and xylose. However, the fermentation stalled at approximately 48 hours after reaching inhibitory levels of butyric acid (18 g/L). When the fermentation pH was increased to 6.0, higher butyric acid titers (50 g/L) were achieved but the fermentation again stalled after 98 hours due to product inhibition. To demonstrate the potential of a continuous co-fermentation process, in situ product recovery via membrane-based liquid-liquid extraction (pertraction) was applied to remove butyric acid. The extracted acids were then recovered from the organic solvent via back extraction into an alkaline solution, producing a high purity product. Results from pertractive fermentations of real corn stover hydrolysate are shown below. |
| Subject |
Clostridium -- Biotechnology.
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Biomass energy.
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Bioénergie.
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Biomass energy (OCoLC)fst00832532
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Clostridium -- Biotechnology
(OCoLC)fst00864641
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| Indexed Term |
BCPL |
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biofuel |
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butyric acid |
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fermentation |
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pertraction |
| Added Author |
National Renewable Energy Laboratory (U.S.), issuing body.
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United States. Department of Energy. Bioenergy Technologies Office, sponsoring body.
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| Standard No. |
1578266 OSTI ID |
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0000-0003-3605-5145 |
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0000-0002-4620-0919 |
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0000-0002-3480-212X |
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0000-0003-0799-061X |
| Gpo Item No. |
0430-P-17 (online) |
| Sudoc No. |
E 9.28:NREL/PO-5100-73786 |
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