Abstract
To develop a cost-effective method for the enhanced production of α-arbutin using Xanthomonas maltophilia BT-112 as a biocatalyst, different fed-batch strategies such as constant feed rate fed-batch, constant hydroquinone (HQ) concentration fed-batch, exponential fed-batch and DO-control pulse fed-batch (DPFB) on α-arbutin production were investigated. The research results indicated that DPFB was an effective method for α-arbutin production. When fermentation with DO-control pulse feeding strategy to feed HQ and yeast extract was applied, the maximum concentrations of α-arbutin and cell dry weight were 61.7 and 4.21 g/L, respectively. The α-arbutin production was 394 % higher than that of the control (batch culture) and the molar conversion yield of α-arbutin reached 94.5 % based on the amount of HQ supplied (240 mM). Therefore, the results in this work provide an efficient and easily controlled method for industrial-scale production of α-arbutin.
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Acknowledgments
This project has been funded by the Key Projects in the National Science & Technology Pillar Program during the 12th 5 years Plan Period (2011BAD22B04), the National Natural Science Foundation of China (21246005), and the National Basic Research Program of China (973 program) (2013CB733600).
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Chunqiao Liu, Peng Zhang contributed equally to this work.
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Liu, C., Zhang, P., Zhang, S. et al. Feeding strategies for the enhanced production of α-arbutin in the fed-batch fermentation of Xanthomonas maltophilia BT-112. Bioprocess Biosyst Eng 37, 325–329 (2014). https://doi.org/10.1007/s00449-013-0980-9
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DOI: https://doi.org/10.1007/s00449-013-0980-9