A kind of method for making gaba tea by microbial fermentation

Abstract

The invention discloses a method for preparing GABA (gamma-aminobutyric acid) tea through microbial fermentation, and belongs to the technical field of tea processing. The method comprises the following steps: performing microwave deactivation on picked fresh tea leaves, rolling, performing high-temperature sterilization, soaking 20 to 60 percent by mass of tea into sterile water, adding a lactobacillus fermentation seed liquid under the conditions that the inoculation amount is 1 to 6 percent, the fermentation temperature is 32 to 42 DEG C and the fermentation time is 24 to 48 hours, taking out the tea after fermentation and drying. By the method provided by the invention, mechanical injury is reduced, the tea can be prevented from being red and broken, and the quality of the finished product tea is uniform. The method is simple in operation and high in controllability. The GABA tea prepared by the method has sour, cool and faint scent, mellow and fresh flavor and light yellow soup, the appearance strips are uniform and tight, the color and luster are oily and dark green, the leaf bottom is uniform and neat, the leaf quality is soft, and the GABA content reaches gamma-aminobutyric acid tea standard; the antibacterial effect is achieved, and long-time preservation and storage are benefited.

Description

technical field [0001] The invention belongs to the technical field of tea processing, in particular to a method for preparing GABA tea by microbial fermentation. Background technique [0002] 1. Overview of γ-aminobutyric acid [0003] Protein is the material basis of life and the main bearer of life activities. Protein is formed by the arrangement and combination of amino acids in a certain way. More than 700 kinds of amino acids have been found, including natural amino acids and artificial amino acids. Most proteins in nature are composed of 20 amino acids in different conformations, and these amino acids are called protein amino acids. Non-protein amino acids refer to a class of substances that are similar in structure to protein amino acids and also contain amino and carboxyl groups, but do not form proteins. Some of these amino acids have special physiological activities, so they are called functional amino acids. γ-aminobutyric acid (GABA for short) is such a func...

AI Technical Summary

Problems solved by technology

However, the operating conditions of the above methods are difficult to control, such as infrared and microwave irradiation are easy to leak, and the cost is too high

Mechanical damage and cooling treatment will damage the quality of tea, so these methods have not been widely used