Abstract
Large amounts of low-quality dates produced worldwide are wasted. Here, highly concentrated fructose syrups were produced via selective fermentation of date extracts with Saccharomyces cerevisiae. Syrups with 95.4–99.9 % (w/w) fructose yields were obtained from date extracts having an initial sugar range of 49–374 g/l without media supplementation; the corresponding ethanol yields were between 69 and 52 % (w/w). At 470 g initial sugars/l, fructose and ethanol yields were 84 and 47 % (w/w), respectively, and the product contained 62 % (w/w) fructose, which is higher than the widely available commercial 42 and 55 % (w/w) high fructose corn syrups. The commercial potential for conversion of waste dates to high-value products is thus demonstrated.
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Acknowledgments
The authors extend their appreciation to the Deanship of Scientific Research and the Research Center at the College of Engineering, King Saud University, for supporting this work.
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Putra, M.D., Abasaeed, A.E., Al-Zahrani, S.M. et al. Production of fructose from highly concentrated date extracts using Saccharomyces cerevisiae . Biotechnol Lett 36, 531–536 (2014). https://doi.org/10.1007/s10529-013-1388-y
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DOI: https://doi.org/10.1007/s10529-013-1388-y