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Enhanced Aspergillus ficuum phytase production in fed-batch and continuous fermentations in the presence of talcum microparticles

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Abstract

This study aimed to enhance Aspergillus ficuum phytase production in fed-batch and continuous fermentations with addition of talcum microparticles. Phytase activity almost doubled in fed-batch and continuous fermentations by addition of 15 g/l of talcum compared to the control. Effect of talcum on fungal morphology was also shown that addition of talcum provided smaller fungal pellets and more homogenized fermentation broth compared to the control. Average fungal pellet radius decreased from 500 to 100 µm by addition of 15 g/l of talcum in the bioreactors. Also, 15 g/l talcum addition increased phytase productivity and optimum dilution rate in the continuous fermentations from 0.293 to 0.621 U/ml/h and from 0.09 to 0.1/h, respectively, compared to control.

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Acknowledgments

This work was supported in part by Turkish Ministry of Education by providing scholarship to Hasan Bugra Coban and the Pennsylvania Agricultural Experiment Station.

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Correspondence to Ali Demirci.

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Coban, H.B., Demirci, A. & Turhan, I. Enhanced Aspergillus ficuum phytase production in fed-batch and continuous fermentations in the presence of talcum microparticles. Bioprocess Biosyst Eng 38, 1431–1436 (2015). https://doi.org/10.1007/s00449-015-1384-9

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Keywords

  • Phytase
  • Aspergillus ficuum
  • Talcum
  • Fed-batch fermentation
  • Continuous fermentation