低乳糖牛乳的研制

Developing Low lactose milk

本论文主要探讨乳糖酶水解生鲜牛乳中乳糖的工艺。实验证明:加入1000NLU/L和2000NLU/I.乳糖酶在37℃温度下3h和1.5h可将生乳中的乳糖含量降低50%左右,在低温9℃下18h和15h也能达到同样的效果,而且,由于乳糖被分解为葡萄糖和半乳糖,使得牛乳甜度增加,改善了风味。

The technology of lactase hydrolyzing lactose in milk is studied in the dissertation.Through the exper iment, four hydrolyzing lactose by lactase are found. In order to hydrolyze 50% lactose in milk, if the lactase dose in 1000 NLU/L and 2000NLU/L, the hydrolysis time is 3h and 1.5h respectively at 37℃,and 18h and 15h respectively at 9℃.Because the lactose is hydrolyzed to glucose and glactose,the hydrolyzed milk is sweet er.