Strategy for the design of a bioreactor for L-lysine immobilized fermentation using Corynebacterium glutamicum.
Appl Microbiol Biotechnol
; 106(17): 5449-5458, 2022 Sep.
Article
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| MEDLINE
| ID: mdl-35902409
ABSTRACT
Biofilm-immobilized fermentation is a novel strategy that has been utilized in L-lysine fermentation. In this study, we describe a strategy for designing bioreactors for immobilized fermentation. We have constructed steel structures in which the carriers can be sewn, forming several star-like structures with different angles, and changing the ventilation robot to the aeration tray. In a 10-L bioreactor, this structure with 12 angles assisted the immobilized system to remedy the gap between free-cell and immobilized fermentation in the conversion rate. In a 50-L bioreactor, this enlarged structure with 16 angles illustrated a 4.61% higher conversion rate than the free-cell fermentation (67.75%) and increased the production by 28.56%. This successful case is the first step towards to industrial production of biofilm-based immobilized fermentation.Key points⢠The designed steel structure is useful for L-lysine immobilized fermentation in a 10-L bioreactor.⢠The conversion rate of immobilized fermentation increased from 13.99 to 60.07% and is 1.03% higher than that of the free-cell fermentation.⢠The conversion rate of the redesigned 50-L bioreactor is higher than that of free-cell fermentation.
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MEDLINE
Asunto principal:
Corynebacterium glutamicum
Idioma:
En
Año:
2022
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Article