Abstract
The production of a highly concentrated probiotic preparation of Lactococcus lactis CECT 539 was studied in both batch and realkalized fed-batch fermentations in diluted whey (DW) media (DW25, DW50, DW75, DW100, and DW125) supplemented with MRS broth nutrients (except glucose and Tween 80) at 25, 50, 75, 100, and 125% of their standard concentrations in the complex medium. The fed-batch culture using DW100 medium provided the highest concentrations of probiotic biomass (5.98 g/L) and nisin (258.47 BU/mL), which were obtained at lower production costs than those estimated for the fed-batch culture in DW medium. The batch and fed-batch cultures reduced the initial chemical oxygen demand (COD) of the media by 29.1–41.7% and 31.2–54.2%, respectively.
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Acknowledgments
This work was supported by the Cluster de Investigación y Transferencia Agroalimentaria del Campus del Auga (CITACA), University of Vigo, Spain.
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Highlights
• A concentrated probiotic culture was produced in nutrient-supplemented whey media.
• Probiotic biomass and nisin synthesis depended on nutrient availability.
• Fed-batch cultures reduced the chemical oxygen demand of the media by 31.0–54.2%.
• Fed-batch cultures provided an almost constant biomass and nisin cost in all media.
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Malvido, M.C., González, E.A., Bazán Tantaleán, D.L. et al. Batch and fed-batch production of probiotic biomass and nisin in nutrient-supplemented whey media. Braz J Microbiol 50, 915–925 (2019). https://doi.org/10.1007/s42770-019-00114-1
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DOI: https://doi.org/10.1007/s42770-019-00114-1