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Extraction of sugars from forced chicory roots

  • Katrin StökleEmail author
  • Andrea Kruse
Original Article
  • 87 Downloads

Abstract

The extraction of fructan and sugars from chicory roots is promising with regard to the production of 5-hydroxymethylfurfural. In this study, the extraction of chicory roots after the salad production was investigated for the first time in order to determine the extraction kinetics. Chicory roots were cut into different shapes (juliennes, slices, and cubes) and were extracted at different temperatures (T = 65 °C; T = 80 °C; T = 90 °C) and with different solid-to-liquid ratios (1:5; 1:10; 1:20) in batch experiments. Maximum extraction yields (90.15% of extracted sugars) were achieved for T = 80 °C and chicory roots that were cut into julienne shape. A solid-to-liquid ratio of 1:10 should be maintained in order to keep the process economical. Regarding the subsequent use of the extract for 5-hydroxymethylfurfural production, 89.5% of initial fructose and 89.8% of initial fructan were extracted at 80 °C. According to this, the sugar-containing extracts could be used in the future in decentralized biorefineries to produce 5-hydroxymethylfurfural directly from chicory roots as an agricultural residue.

Keywords

Inulin Fructan HMF Kinetics Fructose 

Notes

Acknowledgements

We thank Birkenhof Gemüse KG for the friendly support with fresh chicory roots and Jacqueline Kindermann for performing the Kjeldahl analysis. Finally, David Steinbach is to be thanked for his support during this work.

Funding information

This research was funded by the BMBF within the framework of the project “Polymer fibers from bio-based furanoates (PFIFF)” with the funding code 031B0351F.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.University of Hohenheim, Institute of Agricultural EngineeringConversion Technologies of Biobased ResourcesStuttgartGermany

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