Abstract
Gluconobacter oxydans is known to oxidize glucose to gluconic acid (GA), and subsequently, to 2-keto-gluconic acid (2KGA) and 5-keto-gluconic acid (5KGA). 5KGA can be converted to L-(+)-tartaric acid which is important in industry. In order to increase the production of 5KGA, G. oxydans HGI-1 which converts GA only to 5KGA was chosen in this study. The fermentation process occurred in shake flask was studied in different inoculation, and 10 % inoculation amount was chosen. Furthermore, it was scaled-up to a 5-L stirred-tank fermenter, limitation of oxygen could not happen and pH could be adjusted by automated titration of 6 M KOH. 5KGA was accumulated up to 106.33 g/L in fermentation broth, while the strain was fed-batch cultured, the concentration of 5KGA was up to 179.4 g/L and the conversion rate of glucose was 89.0 %. G. oxydans HGI-1 was suitable for industrial production.
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Li, Y., Jia, S., Zhong, C., Wang, H., Guo, A., Zheng, X. (2014). Scale-up of 5-keto-Gluconic Acid Production by Gluconobacter oxydans HGI-1. In: Zhang, TC., Ouyang, P., Kaplan, S., Skarnes, B. (eds) Proceedings of the 2012 International Conference on Applied Biotechnology (ICAB 2012). Lecture Notes in Electrical Engineering, vol 249. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37916-1_31
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DOI: https://doi.org/10.1007/978-3-642-37916-1_31
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