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

 
: Dietz, D.; Sabra, W.; Zeng, A.-P.

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AMB express 3 (2013), Art. 29, 9 S.
ISSN: 2191-0855
Englisch
Zeitschriftenaufsatz
Fraunhofer IAP ()

Abstract
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.

: http://publica.fraunhofer.de/dokumente/N-264428.html