Enhancing Clostridial Acetone-Butanol-Ethanol (ABE) Production and Improving Fuel Properties of ABE-enriched Biodiesel by Extractive Fermentation with Biodiesel |
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| Authors: | Qing Li Hao Cai Bo Hao Congling Zhang Ziniu Yu Shengde Zhou and Liu Chenjuan |
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| Institution: | (1) State Key Laboratory of Agricultural Microbiology, National Engineering Research Centre of Microbial Pesticides, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People’s Republic of China;(2) College of Science, Huazhong Agricultural University, Wuhan, 430070, People’s Republic of China;(3) Department of Biological Sciences, Northern Illinois University, DeKalb, IL 60115, USA; |
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| Abstract: | The extractive acetone–butanol–ethanol (ABE) fermentations of Clostridium acetobutylicum were evaluated using biodiesel as the in situ extractant. The biodiesel preferentially extracted butanol, minimized product
inhibition, and increased production of butanol (from 11.6 to 16.5 gL−1) and total solvents (from 20.0 to 29.9 gL−1) by 42% and 50%, respectively. The fuel properties of the ABE-enriched biodiesel obtained from the extractive fermentations
were analyzed. The key quality indicators of diesel fuel, such as the cetane number (increased from 48 to 54) and the cold
filter plugging point (decreased from 5.8 to 0.2 °C), were significantly improved for the ABE-enriched biodiesel. Thus, the
application of biodiesel as the extractant for ABE fermentation would increase ABE production, bypass the energy intensive
butanol recovery process, and result in an ABE-enriched biodiesel with improved fuel properties. |
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