制糖脱色脱钙树脂的偶合再生及其废液的回用

Coupled Regeneration of Decolourization and Decalcification Resin in Sugar Industry and Reuse of Regenerated Waste Liquid

再生废液处理是制约离子交换树脂在糖汁清净中应用的关键.为实现再生废液的回用,文中采用制糖脱色树脂再生废液再生脱钙树脂,实现制糖脱色脱钙树脂的偶合再生,并分析了偶合再生废液的抗氧化活性和功能成分.结果表明:色素和Ca2+的复合有助于Ca2+的解析;用300 mL脱色树脂D201×7的碱性再生废液再生60 mL脱钙树脂BK001,可得到56.7 g具有抗氧化活性的富钙色素,树脂再生率为95.4%;富钙色素中Na+、Ca2+和氨基酸含量分别为260.00、29.29和29.80mg/g,脱钠后其水溶液吸光度满足焦糖色素国标GB 8817—2001的要求.

The treatment of regenerated waste liquid is a key to the application of ion exchange resin to the purification of sugar juice.In order to reuse the regenerated waste liquid,the regeneration of decolourization and decalcification resin in sugar industry was coupled by regenerating the decalcification resin using the waste liquid from regenerated decolourization resin,and the antioxidant activity and functional components of the coupled regeneration waste liquid were determined.The results indicate that（1） the complexation of Ca2＋ with pigment benefits the Ca2＋ desorption from the resin;（2） by regenerating 60mL of decalcification resin BK001 with 300mL of alkaline waste liquid in a regenerating procedure of decolourization resin（D201×7）,56.7g of calcium-rich pigment with antioxidant activity can be obtained,with a regeneration percentage of decalcification resin of 95.4%;（3） the contents of Na＋,Ca2＋ and amino acids in the calcium-rich pigment are respectively 260.00,29.29 and 29.80mg/g;and（4） the absorbance of the aqueous pigment solution without NaCl meets the caramel standard presented by GB 8817—2001.