Process optimized for production of iturin A in biofilm reactor by Bacillus velezensis ND.

Bioprocess Biosyst Eng

College of Life Sciences, Shihezi University, Xinjiang, People's Republic of China.

Published: July 2024

In this research, to provide an optimal growth medium for the production of iturin A, the concentrations of key amino acid precursors were optimized in shake flask cultures using the response surface method. The optimized medium were applied in a biofilm reactor for batch fermentation, resulting in enhanced production of iturin A. On this basis, a step-wise pH control strategy and a combined step-wise pH and temperature control strategy were introduced to further improve the production of iturin A. Finally, the fed-batch fermentation was performed based on combined step-wise pH and temperature control. The titer and productivity of iturin A reached 7.86 ± 0.23 g/L and 65.50 ± 1.92 mg/L/h, respectively, which were 37.65 and 65.20% higher than that before process optimization.

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Source
http://dx.doi.org/10.1007/s00449-024-03038-9DOI Listing

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