Pilot scale inulin extraction from chicory roots assisted by pulsed electric fields |
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Authors: | Zhenzhou Zhu Olivier Bals Nabil Grimi Eugene Vorobiev |
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Affiliation: | Université de Technologie de Compiègne EA 4297 TIMR/ESCOM, Centre de Recherche de Royallieu, B.P. 20529, 60205 Compiègne, France |
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Abstract: | A pilot study for the pulsed electric fields (PEF) assisted countercurrent diffusion of inulin from chicory roots is presented. The influence of PEF parameters (electric field intensity E = 600 V cm?1, treatment duration tPEF = 10–50 ms) and diffusion temperature (varied between 30 and 80 °C) on soluble matter extraction kinetics, inulin content of juice, and pulp exhaustion are investigated. The draft (liquid to solid mass ratio) was fixed at 140%, similar to the industrial conditions. PEF treatment facilitates extraction of inulin at conventional diffusion temperature (70–80 °C), and diffusion temperature can even be reduced by 10–15 °C with comparable juice inulin concentration. Less energy consumption can be achieved by reducing PEF treatment duration to 10 ms, which is observed sufficient for effective extraction. |
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Keywords: | Chicory inulin pilot countercurrent extraction pulsed electric field |
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