Multi-fixed-bed bioreactor system applied for bioprocess development of immobilized lactic acid bacteria

The multi-fixed-bed bioreactor “Multiferm” provides a downscaled system for the development of fixed-bed processes with immobilized microorganisms or cells. It consists of twelve single fixed-bed units that can be operated independently. Different bacterial strains, carriers used for immobilization, media or flow rates can be studied in one compact experimental set-up. Experiments can be run in parallel to allow for determination of experimental errors. In these studies several continuous cultivations were carried out with Lactobacillus delbrueckii ssp. bulgaricus using different dilution rates and culture durations as proof-ofconcept for the Multiferm. Parameters relevant for process design such as reproducibility of simultaneously performed cultures, optimal dilution rate and long-term performance were determined by means of volume specific lactate and biomass productivity. First indications on a reduced growth rate of the cells due to immobilization were found.

Subjects

Cell density

continuous cultivation

dilution rate

experimental error

fixed-bed

lactic acid bacteria

metabolic activity

process development

scale-down

DDC Class

570: Biowissenschaften, Biologie

Lizenz

https://creativecommons.org/licenses/by-nc/4.0/

Name

TOBIOTJ-10-1.pdf

Size

6.31 MB

Format

Adobe PDF

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Multi-fixed-bed bioreactor system applied for bioprocess development of immobilized lactic acid bacteria