Simplified preparation method of low-lactose milk powder

Abstract

The invention provides a simplified preparation method of low-lactose milk powder, and belongs to the technical field of dairy product production. According to the invention, a pasteurizing process and a lactose degradation process of the milk are carried out synchronically. In the initial stage of the pasteurizing process of the milk, lactase is added into the milk, and the enzyme hydrolysis process and the pasteurizing process are carried out simultaneously. The equipment used for common milk production processes is not increased, such that equipment investment is relatively reduced. Also, the chance for secondary pollution is reduced. Because the enzyme has a characteristic of high activity, the lactose hydrolysis process is achieved simultaneously during the pasteurizing process. Therefore, the production period of the low-lactose milk is shortened, and the production efficiency is improved. With the enzyme, during the lactose hydrolysis process, galactooligosaccharide with relatively high yield is obtained, such that the nutritive value of the milk is improved.

Description

technical field [0001] The invention relates to the technical field of dairy product production and processing, in particular to a simplified preparation method of low-lactose milk powder. Background technique [0002] Generally, the low-lactose low-lactose milk powder hydrolysis process has the following defects: 1. The enzymatic hydrolysis treatment takes a long time, usually 5-7 days; 2. Since the enzyme is not resistant to high temperature, it cannot be used in the milk pasteurization process; 3. The production process must increase the cost of lactase dripping equipment with a price of several million, which increases the cost of production equipment. Therefore, the small and medium-sized dairy industry in China cannot afford the equipment cost brought by adding this equipment and cannot produce low-lactose milk; 4 , the enzyme dropping process is after sterilization, so this process is very likely to cause the risk of secondary pollution of bacteria, causing potential ...

AI Technical Summary

Problems solved by technology

[0002] Generally, the low-lactose low-lactose milk powder hydrolysis process has the following defects: 1. The enzymatic hydrolysis treatment takes a long time, usually 5-7 days; 2. Since the enzyme is not resistant to high temperature, it cannot be used in the milk pasteurization process; 3. The production process must increase the cost of lactase dripping equipment with a price of several million, which increases the cost of production equipment. Therefore, the small and medium-sized dairy industry in my country cannot afford the equipment cost brought by adding this equipment and cannot produce low-lactose milk; 4 , the enzyme dropping process is after sterilization, so this process is very likely to cause the risk of secondary pollution of bacteria, causing potential harm to dairy factories and drinkers; Milk introduces more foreign proteins; 6. The enzyme is not stable at room temperature, which brings inconvenience to storage and application; 7. There are many enzyme protectants in the enzyme preparation, which will adversely affect the quality of milk