Journal
BIORESOURCE TECHNOLOGY
Volume 184, Issue -, Pages 379-385Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.11.017
Keywords
Microalgae; ABE fermentation; Butyrate; Clostridium acetobutylicum
Funding
- Bureau of Energy, Ministry of Economic Affairs Energy Technology Program for Academia [102-D0613]
- Ministry of Education of Taiwan
- National Science Council of Taiwan [NSC 103-2221-E-006 -009 -MY3]
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This study conducted batch experiments to evaluate the potential of butanol production from microalgae biodiesel residues by Clostridium acetobutylicum. The results indicated that with 90 g/L of glucose as the sole substrate the highest butanol yield of 0.2 g/g-glucose was found, but the addition of butyrate significantly enhanced the butanol yield. The highest butanol yield of 0.4 g/g-glucose was found with 60 g/L of glucose and 18 g/L of butyrate. Using microalgae biodiesel residues as substrate, C. acetobutylicum produced 3.86 g/L of butanol and achieved butanol yield of 0.13 g/g-carbohydrate via ABE fermentation, but the results indicated that approximately one third of carbohydrate was not utilized by C. acetobutylicum. Biological butanol production from microalgae biodiesel residues can be possible, but further research on fermentation strategies are required to improve production yield. (C) 2014 Elsevier Ltd. All rights reserved.
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