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Changsha University of Science and Technology
Anoectochilus roxburghii; freeze concentration; suspension; loss rate; concentration rate
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Optimization On Freezing Concentration Of Aqueos Extracts From Anoectochilus Roxburghii Rhizome, Wang Wencheng, Chen Meiying, Chen Jinquan
Optimization On Freezing Concentration Of Aqueos Extracts From Anoectochilus Roxburghii Rhizome, Wang Wencheng, Chen Meiying, Chen Jinquan
Food and Machinery
The freezing concentration of aqueos extracts feom the residual rhizome of Anoectochilus roxburghii has been investigated. The loss rate caused by entrainment of ice crystals and the rate of the freezing concentration were selected as the evaluation indexes to design the optimization of processing by the response surface methodology. The experimental results showed that the most ideal process were as the followed: the temperature difference between refrigerant and concentration 5 ℃, scraper speed 45 r/min, and freeze concentration time, 13.5 h. Under the conditions, the loss rate caused by entrainment o f ice crystals was 0.891 0% and the rate …