Abstract
Sugar beet pulp (SBP) and molasses, as an agro industrial waste material, are produced in large amounts annually. Thus, a major challenge nowadays is to develop procedures that could increase the value of the generated waste. In this study, SBP as a support for cell immobilization and molasses as a source of nutrients were used for a dextransucrase (DS) production by Leuconostoc mesenteroides T3. The influence of SBP in native form (SBP-N) and after treatment with NaOH (SBP-NaOH) on DS production was investigated. The optimal medium composition for the maximum DS production was determined by varying the concentration of molasses, SBP, and sucrose. The maximum DS yield of 2.02 U/ml was obtained in the medium with 2.5 % of molasses, 2.5 % SBP-NaOH, and 4 % of sucrose concentration. Scanning electron microscopy (SEM) showed immobilization of Lc. mesenteroides T3 cells onto SBP-NaOH. According to the obtained results, the production of DS on molasses could be improved by using NaOH-treated SBP as a carrier for whole-cell immobilization. Our study reveals the basis for the development of process for DS production with additional reduction of expenses by using waste materials for obtaining the valuable biotechnological product.
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Acknowledgments
The financial support for this investigation given by the Ministry of Education, Science and Technological Development of Republic of Serbia under the project TR 31035 is gratefully acknowledged. The authors would also like to thank Nordic Sugar from Denmark for providing a material for research.
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Miljković, M.G., Davidović, S.Z., Carević, M.B. et al. Sugar Beet Pulp as Leuconostoc mesenteroides T3 Support for Enhanced Dextransucrase Production on Molasses. Appl Biochem Biotechnol 180, 1016–1027 (2016). https://doi.org/10.1007/s12010-016-2149-x
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DOI: https://doi.org/10.1007/s12010-016-2149-x