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Received July 7, 2008
Accepted September 7, 2008
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Fermentation process development for hyaluronic acid production by Streptococcus zooepidemicus ATCC 39920

Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, No.415, Chien Kung Road, Kaohsiung 80778, Taiwan 1Department of Chemical Engineering, National Cheng Kung University, No.1, University Road, Tainan 70101, Taiwan
biochen@cc.kuas.edu.tw
Korean Journal of Chemical Engineering, March 2009, 26(2), 428-432(5), 10.1007/s11814-009-0072-3
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Abstract

The development of a fermentation strategy for hyaluronic acid (HA) production by Streptococcus zooepidemicus ATCC 39920 has been explored. The specific HA productivity (Y P/X) was affected by the medium carbon-tonitrogen (C/N) ratio rather than the specific growth rate of cells. Accordingly, HA fermentation should be performed in a balanced medium with an optimum C/N ratio of 2 : 1 in a batch culture. To improve the performance of the batch culture, the operation conditions for the fill-and-draw culture were investigated. It was found that the timing of medium_x000D_ exchange is critical for successfully performing fill-and-draw operations. Since streptococcal cells at the stationary phase might lose the capacity of HA synthesis, the displacement of the medium in a fill-and-draw culture should be started at the late exponential growth phase.

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