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Optimization of the main liming process for inulin crude extract from Jerusalem artichoke tubers |
Huandong LI, Hongji ZHU( ), Jianjun QIAO, Junhu DU, Hua ZHANG |
Key Laboratory of Systems Bioengineering, Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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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.
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Keywords
inulin
homogenate extraction
Jerusalem artichoke
main liming process
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Corresponding Author(s):
ZHU Hongji,Email:zhuhongji163@163.com
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Issue Date: 05 September 2012
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