Saccharomyces cerevisiae and kefir production using waste pomegranate juice, molasses, and whey

Chryssa Nouska, Ioanna Mantzourani, Athanasios Alexopoulos, Eugenia Bezirtzoglou, Argyro Bekatorou, Konstantoula Akrida-Demertzi, Panagiotis Demertzis and Stavros Plessas
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Chryssa Nouska: Laboratory of Microbiology, Biotechnology and Hygiene, Faculty of Agriculture Development, Democritus University of Thrace, Orestiada, Greece
Ioanna Mantzourani: Laboratory of Microbiology, Biotechnology and Hygiene, Faculty of Agriculture Development, Democritus University of Thrace, Orestiada, Greece
Athanasios Alexopoulos: Laboratory of Microbiology, Biotechnology and Hygiene, Faculty of Agriculture Development, Democritus University of Thrace, Orestiada, Greece
Eugenia Bezirtzoglou: Laboratory of Microbiology, Biotechnology and Hygiene, Faculty of Agriculture Development, Democritus University of Thrace, Orestiada, Greece
Argyro Bekatorou: Department of Chemistry, University of Patras, Patras, Greece
Konstantoula Akrida-Demertzi: Laboratory of Food Chemistry and Technology, Department of Chemistry, University of Ioannina, Ioannina, Greece
Panagiotis Demertzis: Laboratory of Food Chemistry and Technology, Department of Chemistry, University of Ioannina, Ioannina, Greece
Stavros Plessas: Laboratory of Microbiology, Biotechnology and Hygiene, Faculty of Agriculture Development, Democritus University of Thrace, Orestiada, Greece

Czech Journal of Food Sciences, 2015, vol. 33, issue 3, 277-282

Abstract: The growth of Saccharomyces cerevisiae (baker's yeast) and kefir was studied in substrates containing pomegranate juice, molasses, and cheese whey, at various conditions such as fermentation temperature, air supply, initial sugar concentration, and substrate composition. The results showed that, in the case of kefir, the highest production yield of biomass (0.24 g/g of utilised sugar) and productivity (6.5 g/l/day) was obtained in 40/60 and 20/80% of pomegranate/cheese whey. S. cerevisiae grew easily on all substrates with higher cell mass yields (0.34 g/g) and productivities (13.1 g/l/day) compared to kefir, with the best results obtained at the ratio of 40/60 and 20/80% of pomegranate/molasses. These results are promising regarding the exploitation of non-conventional substrates, such as the juice from discarded pomegranate fruits of a currently significantly increasing market, for microbial biomass production.

Keywords: baker's yeast; lactic acid bacteria; cheese whey; growth; agricultural wastes; fruit (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:33:y:2015:i:3:id:351-2014-cjfs

DOI: 10.17221/351/2014-CJFS

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