Abstract
Biosurfactants stand for highly useful and promising compounds. They basically serve for a variety of applications in multiple industries and aspects of human life. Therefore, it is highly required to improve their production yield especially through the development of new and more efficient fermentation processes. In this aim, batch and fed-batch were studied and compared in terms of their effective biosurfactant production by Bacillus subtilis SPB1. Experiments of fed-batch fermentations were carried out through three different glucose feeding strategies, namely the pulsed, the constant Donespeed and the exponential feeding. The comparison between different fermentation processes revealed that fed-batch process proved to be a more efficient cultivation strategy than the batch process in terms of cell biomass, biosurfactant production and productivity. Among the three different feeding strategies, the exponential feeding process achieved the highest fermentation results of final biosurfactant concentration. The latter increased more than twofolds compared to batch fermentation.
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Acknowledgements
This work was supported by grants from the Tunisian Ministry of Higher Education, Scientific Research and Technology. It is part of a research project on Biosurfactant Production, Characterization and Application.
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Funding for this research work was granted by the Ministry of Higher Education and Research of Tunisia.
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Bouassida, M., Mnif, I. & Ghribi, D. Enhanced biosurfactant production by Bacillus subtilis SPB1 using developed fed-batch fermentation: effects of glucose levels and feeding systems. Bioprocess Biosyst Eng 46, 555–563 (2023). https://doi.org/10.1007/s00449-022-02839-0
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DOI: https://doi.org/10.1007/s00449-022-02839-0