Co-cultivation of Lactobacillus zeae and Veillonella criceti for the production of propionic acid

In this work a defined co-culture of the lactic acid bacterium Lactobacillus zeae and the propionate producer Veillonella criceti has been studied in continuous stirred tank reactor (CSTR) and in a dialysis membrane reactor. It is the first time that this reactor type is used for a defined co-culture fermentation. This reactor allows high mixing rates and working with high cell densities, making it ideal for co-culture investigations. In CSTR experiments the co-culture showed over a broad concentration range an almost linear correlation in consumption and production rates to the supply with complex nutrients. In CSTR and dialysis cultures a strong growth stimulation of L. zeae by V. criceti was shown. In dialysis cultures very high propionate production rates (0.61 g L-1h-1) with final titers up to 28 g L-1 have been realized. This reactor allows an individual, intracellular investigation of the co-culture partners by omic-technologies to provide a better understanding of microbial communities. © 2013 Bel-Rhlid et al.

Subjects

Propionic Acid

Lactic Acid

Lactobacillus zeae

Veillonella criceti

Dialysis chamber reactor

Co-culture

Fermentation

DDC Class

570: Biowissenschaften, Biologie

Lizenz

https://creativecommons.org/licenses/by/2.0/

Name

2191-0855-3-29.pdf

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1.12 MB

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Adobe PDF

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Co-cultivation of Lactobacillus zeae and Veillonella criceti for the production of propionic acid