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Fermentation 2017, 3(1), 3; doi:10.3390/fermentation3010003

Assessment of Acidified Fibrous Immobilization Materials for Improving Acetone-Butanol-Ethanol (ABE) Fermentation

1
Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan
2
Department of Materials Science and Engineering, National Chung Hsing University, Taichung 402, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Thaddeus Ezeji
Received: 13 October 2016 / Revised: 15 December 2016 / Accepted: 23 December 2016 / Published: 30 December 2016
(This article belongs to the Special Issue Biofuels and Biochemicals Production)
View Full-Text   |   Download PDF [3612 KB, uploaded 30 December 2016]   |  

Abstract

Acetone-butanol-ethanol (ABE) fermentation using Clostridium acetobutylicum is a process that can be used to produce butanol, which can be utilized as an alternative to petroleum-based fuels. Immobilization of the bacteria using three different fibrous materials was studied in order to see how to improve the ABE fermentation process. The results were compared to those of non-immobilized bacteria. Modal and charcoal fibers had OD levels below one at 72 h with the butanol concentration reaching 11.0 ± 0.5 and 10.7 ± 0.6 g/L, respectively, each of which were close to the free cell concentration at 11.1 ± 0.4 g/L. This suggests that bacteria can be efficiently immobilized in these fibrous materials. Although an extended lag phase was found in the fermentation time course, this can be easily solved by pre-treating fibrous materials with 3.5% HCl for 12 h. From comparisons with previous studies, data in this study suggests that a hydrophilic surface facilitates the adsorption of C. acetobutylicum. View Full-Text
Keywords: immobilization; modal fibers; acid treatment; Clostridium acetobutylicum; Acetone-Butanol-Ethanol (ABE) fermentation immobilization; modal fibers; acid treatment; Clostridium acetobutylicum; Acetone-Butanol-Ethanol (ABE) fermentation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zeng, H.-S.; He, C.-R.; Yen, A.T.-C.; Wu, T.-M.; Li, S.-Y. Assessment of Acidified Fibrous Immobilization Materials for Improving Acetone-Butanol-Ethanol (ABE) Fermentation. Fermentation 2017, 3, 3.

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