Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.biortech.2013.11.094
Title: Direct fermentation of xylan by clostridium strain BOH3 for the production of butanol and hydrogen using optimized culture medium
Authors: Rajagopalan, G.
He, J. 
Yang, K.L.
Keywords: ABE fermentation
Biohydrogen
Clostridium spp.
Response surface methodology
Xylanase
Issue Date: Feb-2014
Source: Rajagopalan, G., He, J., Yang, K.L. (2014-02). Direct fermentation of xylan by clostridium strain BOH3 for the production of butanol and hydrogen using optimized culture medium. Bioresource Technology 154 : 38-43. ScholarBank@NUS Repository. https://doi.org/10.1016/j.biortech.2013.11.094
Abstract: Clostridium strain BOH3 is able to utilize 10. g/l of xylan in reinforced clostridial medium (RCM) and produce butanol and hydrogen. However, increasing xylan concentration to 30. g/l does not enhance the production of butanol and hydrogen due to insufficient expression of xylanase enzyme (27.5. U/mg). To enhance the xylanase activity, an optimized culture medium (OCM), which consists of sugarcane bagasse hydrolysate (11.75. g/l), ammonium sulfate (8.92. g/l) and iron (III) chloride (1.45. mM) is designed. In the optimized OCM, Clostridium strain BOH3 expresses more xylanase and shows higher xylanase activity (44.05. ±. 0.25. U/mg) in the OCM. This activity is about 1.6-fold higher than that in the original RCM. Employing OCM as a medium, Clostridium strain BOH3 effectively ferments high concentration (30 and 50. g/l) of xylan and produces 12.05. ±. 0.15 and 14.80. ±. 0.15. g/l of butanol and 1.78. ±. 0.08 and 2.65. ±. 0.15. l/l of hydrogen, respectively. © 2013.
Source Title: Bioresource Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/59010
ISSN: 09608524
DOI: 10.1016/j.biortech.2013.11.094
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