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Appl Environ Microbiol. 1999 May;65(5):2260-3. doi: 10.1128/AEM.65.5.2260-2263.1999.

Whey fermentation by anaerobiospirillum succiniciproducens for production of a succinate-based animal feed additive .

Applied and environmental microbiology

Datta, Jain, Samuelov, Zeikus

Affiliations

  1. Department of Biochemistry, Michigan State University, East Lansing, Michigan 48824, USA.

PMID: 10224033 PMCID: PMC91330 DOI: 10.1128/AEM.65.5.2260-2263.1999
Free PMC Article

Abstract

Anaerobic fermentation processes for the production of a succinate-rich animal feed supplement from raw whey were investigated with batch, continuous, and variable-volume fed-batch cultures with Anaerobiospirillum succiniciproducens. The highest succinate yield, 90%, was obtained in a variable-volume fed-batch process in comparison to 80% yield in a batch cultivation mode. In continuous culture, succinate productivity was 3 g/liter/h, and the yield was 60%. Under conditions of excess CO2, more than 90% of the whey-lactose was consumed, with an end product ratio of 4 succinate to 1 acetate. Under conditions of limited CO2, lactose was only partially consumed and lactate was the major end product, with lower levels of ethanol, succinate, and acetate. When the succinic acid in this fermentation product was added to rumen fluid, it was completely consumed by a mixed rumen population and was 90% decarboxylated to propionate on a molar basis. The whey fermentation product formed under excess CO2, which contained mainly organic acids and cells, could potentially be used as an animal feed supplement.

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