Scaling Up Co-cultivation Fermentation of Lactococcus lactis ATCC 11454 and Lactobacillus rhamnosus ATCC 7469 with Various Feeding Strategies
DOI:
https://doi.org/10.54987/jobimb.v12iSP1.954Keywords:
Lactic acid bacteria, Co-cultivation, Riboflavin, Nisin, BioreactorAbstract
This study aimed to analyse the effect of cocultivation between Lactococcus lactis ATCC 11454 with Lactobacillus rhamnosus ATCC 7469 through their growth profile, riboflavin and nisin production in 2.0 L stirred tank bioreactors. Batch fermentation was employed in the control (C) bioreactor, while fed-batch fermentation employed in bioreactor run (B1) and run 2 (B2), with different medium flow rates of 10 mL/min and 1.6 mL/min, respectively. Results showed that B1 was able to generate an increase of 33.5 % in riboflavin production and a 36% growth rate compared to C and B2. The application in the fermentation process resulted in a prolonged exponential phase, subsequently contributing to a longer metabolite production timeframe. The findings from this study provided an efficient prospect of LAB co-culture, potentially by extending riboflavin production time and increasing vitamin levels in fermented foods or facilitating the production of valuable metabolites.
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