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Study on manufacture conditions of low-lactose milk by lactase

Guangyu Gong

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Abstract

By the orthogonal design, the dosage of lactase, hydrolysis time, hydrolysis temperature and pH on the hydrolysis rate of lactose are studied in low-lactose milk manufacture. The hydrolysis rate of milk hydrolized with 1500 NLU/L lactase at 38 ℃ and a pH of 6.8 for 3 hours is 75.2%. Moreover, the acidity and microbial indicators also meet the requirement. At the same time by improving the manufacture process after hydrolysis, the browning of low-lactose milk is solved.

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What this paper is about

By the orthogonal design, the dosage of lactase, hydrolysis time, hydrolysis temperature and pH on the hydrolysis rate of lactose are studied in low-lactose milk manufacture. The hydrolysis rate of milk hydrolized with 1500 NLU/L lactase at 38 ℃ and a pH of 6.8 for 3 hours is 75.2%. Moreover, the acidity and microbial indicators also meet the requirement. At the same time by improving the manufacture process after hydrolysis, the browning of low-lactose milk is solved.

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Available abstract

By the orthogonal design, the dosage of lactase, hydrolysis time, hydrolysis temperature and pH on the hydrolysis rate of lactose are studied in low-lactose milk manufacture. The hydrolysis rate of milk hydrolized with 1500 NLU/L lactase at 38 ℃ and a pH of 6.8 for 3 hours is 75.2%. Moreover, the acidity and microbial indicators also meet the requirement. At the same time by improving the manufacture process after hydrolysis, the browning of low-lactose milk is solved.

Key concepts: Lactase, Lactose, Hydrolysis, Chemistry, Food science, Biochemistry

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