RESEARCH ARTICLE

Optimization of the main liming process for inulin crude extract from Jerusalem artichoke tubers

  • Huandong LI ,
  • Hongji ZHU ,
  • Jianjun QIAO ,
  • Junhu DU ,
  • Hua ZHANG
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  • Key Laboratory of Systems Bioengineering, Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received date: 16 Dec 2011

Accepted date: 19 Jan 2012

Published date: 05 Sep 2012

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

A three-stage homogenate extraction was used as a new method for inulin extraction from Jerusalem artichoke tubers. Compared with the results from conventional hot water extraction, the three-stage homogenate extraction gave higher yields and caused less degradation of the inulin. The inulin crude extract was then clarified by a carbonate-precipitation method, during which three variables — the quicklime mass, the reaction temperature and the reaction time were optimized for the main liming process to give the best clarification effect. A Plackett-Burman design, the path of steepest ascent method, a Box-Behnken design and response surface methodology (RSM) were employed in the experimental design. The optimal conditions for the main liming process were determined to be 12.0 g/L, 71.4°C and 8 min. The confirmatory tests proved that the best clarification efficiency (92.74%) was achieved at these conditions and this was approximately equal to the value predicted by the model.

Cite this article

Huandong LI , Hongji ZHU , Jianjun QIAO , Junhu DU , Hua ZHANG . Optimization of the main liming process for inulin crude extract from Jerusalem artichoke tubers[J]. Frontiers of Chemical Science and Engineering, 2012 , 6(3) : 348 -355 . DOI: 10.1007/s11705-012-1295-0

Acknowledgments

This work was financially supported by the Natural Science Fund of Tianjin (Grant No. 9340080).
Nomenclature
DPDegree of polymerization INRR inulin retention ratio
TSHEThree-stage homogenate extraction IMRR impurities removal ratio
HWEHot water extraction CE clarification efficiency
MLPMain liming process
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