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The possibility of lactic acid fermentation in the triticale stillage

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Author(s): MILICA MARKOVIĆ | SINIŠA MARKOV | DUŠANKA PEJIN | LJILJANA MOJOVIĆ | MAJA VUKAŠINOVIĆ | JELENA PEJIN | NATAŠA JOKOVIĆ

Journal: Chemical Industry and Chemical Engineering Quarterly
ISSN 1451-9372

Volume: 17;
Issue: 2;
Start page: 153;
Date: 2011;
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Keywords: triticale stillage | lactic acid | Lactobacillus sp. | CaCO3

ABSTRACT
Triticale stillage is a by-product of bioethanol production. A research study was conducted in order to see if triticale stillage is adequate for lactic acid bacteria growth and lactic acid fermentation. Three Lactobacillus strains: Lactobacillus fermentum NRRL-B-75624, Lactobacillus fermentum PL-1, and Lactobacillus plantarum PL-4 were taken into consideration. Lactic acid fermentation was monitored by measuring pH value and titratable acidity. Lactobacillus fermentum PL-1 had the greatest decrease of pH values and increase of titratable acidity so it was chosen for future work. During the research, it was investigated how nutrient composition of triticale stillage and CaCO3 can influence lactic acid fermentation and CaCO3 role in cell protection. The nutrient composition of triticale stillage was satisfactory for lactic acid fermentation. The addition of CaCO3 helped in lactic acid fermentation. Although the titratable acidity in the samples with CaCO3 was lower than in the samples without CaCO3, the number of viable cells was higher for the samples with CaCO3, which showed that CaCO3 protected lactic acid cells from inhibition by lactic acid.
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