Application of solid microbe fermentation technology in processing Puer tea
A solid-state fermentation and microbial technology, applied in the biological field, can solve problems that have not yet been seen, and achieve the effect of improving the quality of Pu-erh tea, shortening the processing time, and increasing the benefits of the enterprise
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[0008] Example 1: (Inoculation of a single beneficial strain)
[0009] The wool tea is piled evenly in tidal water according to the traditional method, and at the same time, the raw materials of the wool tea are inoculated with 0.01%, 0.03%, 0.05% by weight of Aspergillus oryzae, Aspergillus niger or brewing yeast to ferment it. When the tea pile has moisture content More than 15%, when the heap temperature rises to 35±2℃, normal growth, metabolism and reproduction will begin, and as the heap temperature further rises, a large amount of glucoamylase, cellulase, pectinase, etc. will be secreted Enzyme system. After 30-40 days of solid-state fermentation of the ingredients in tea leaves at 37°C, the tea leaves undergo oxidation, hydrolysis, synthesis and other biochemical reactions under the catalysis of these enzymes, making the reducing sugars and soluble in the tea leaves. Carbohydrates and pectin show an increasing trend. Therefore, the content of soluble carbohydrates in fermen...
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[0011] Example 2: (Inoculation of mixed beneficial bacteria)
[0012] Basically the same as in Example 1. The difference is that the strains added to the raw tea are mixed beneficial strains, which are obtained by mixing Aspergillus niger, Aspergillus oryzae and Saccharomyces cerevisiae at a ratio of 1:1:1 or 1:2:1, respectively. The beneficial bacteria are added to the large-scale production and processing technology of Pu'er tea in amounts of 0.01%, 0.03%, and 0.05% by weight, respectively.
[0013] The quality of Pu'er tea produced after inoculation of mixed beneficial bacteria has been significantly improved. The content of tea polyphenols in Pu'er tea is 12-15%, the brown pigment content is 10%-12%, and the content of tea polysaccharides is 3%. , The processed Pu'er tea has a strong red and bright color, a sweet, smooth and mellow taste, and a unique aging aroma.
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