Abstract
For the commercial production of CoQ10, batch-type fermentations were attempted in a 150-l fermenter using a mutant strain of R. sphaeroides. Optimum temperature and initial aeration rate were found to be 30°C and 2 vvm, respectively. Under optimum fermentation conditions, the maximum value of specific CoQ10 content was achieved reproducibly as 6.34 mg/g DCW after 24 h, with 3.02 g/l of DCW. During the fermentation, aeration shift (from the adequate aeration at the early growth phase to the limited aeration in active cellular metabolism) was a key factor in CoQ10 production for scale-up. A higher value of the specific CoQ10 content (8.12 mg/g DCW) was achieved in fed-batch fermentation and comparable to those produced by the pilot-scale fed-batch fermentations of A. tumefaciens, which indicated that the mutant strain of R. sphaeroides used in this study was a potential high CoQ10 producer. This is the first detailed study to demonstrate a pilot-scale production of CoQ10 using a mutant strain of R. sphaeroides.
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This research was supported by a grant (M2007-05) from the Marine Bioprocess Research Center of the Marine Bio 21 Center funded by the Ministry of Land, Transport and Maritime, Republic of Korea.
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Kien, N.B., Kong, IS., Lee, MG. et al. Coenzyme Q10 production in a 150-l reactor by a mutant strain of Rhodobacter sphaeroides . J Ind Microbiol Biotechnol 37, 521–529 (2010). https://doi.org/10.1007/s10295-010-0699-4
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DOI: https://doi.org/10.1007/s10295-010-0699-4