食品科学 ›› 2007, Vol. 28 ›› Issue (11): 146-149.

• 基础研究 • 上一篇    下一篇

低聚木糖溶液冷冻浓缩时溶质的分配行为研究

 江华, 余世袁   

  1. 南京林业大学化学工程学院; 南京林业大学化学工程学院 江苏南京210037; 江苏南京210037;
  • 出版日期:2007-11-15 发布日期:2011-11-22

Partition Behavior of Solute during Freeze Concentration of Xylo-oligosaccharides

 JIANG  Hua, YU  Shi-Yuan   

  1. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
  • Online:2007-11-15 Published:2011-11-22

摘要: 本实验研究了低聚木糖溶液冷冻浓缩过程中主体的湍动程度、冰晶种量、冷媒温度对低聚木糖在冰相和液相之间的分配系数的影响。结果表明:晶核生长器中主体溶液的湍动程度增加,有利于降低低聚木糖溶液冷冻浓缩时的表观系数,提高浓缩过程的选择性。搅拌速度为500r/min时的分配系数仅有搅拌速度为100r/min时的十分之一。低聚木糖溶液冷冻浓缩时,冷媒温度为-0.5℃和-1.5℃时的表观分配系数相等,但当冷媒温度降低到-3.0℃时,分配系数增加了两倍。

关键词: 低聚木糖, 冷冻浓缩, 分配系数

Abstract: The effects of turbulence in the bulk solution, the dosage of ice crystal seed and the coolant temperature on the partition behavior between ice crystal and bulk solution during the freeze concentration of xylo-oligosacchrides were investigated. It showed that the observed partition coefficient decreases with increase in turbulence of the bulk solution during ripeness of ice crystal. The observed partition coefficient at the stirring rate of 500 r/min is only one tenth of 100 r/min, therefore, the more turbulent the bulk solutions, the higher the selectivity. The dosage of ice crystal seed has no effect on the observed partition coefficient. The observed partition coefficient at the coolant temperature of -0.5 ℃ is the same as one at -1.5 ℃, but the observed partition coefficient increases twice when the coolant temperature is reduced from -1.5 ℃ to -3.0 ℃.

Key words: xylo-oligosaccharides, freeze concentration, observed partition coefficient