CN110613033A - High-tea-polyphenol golden flower black tea powder extraction method and high-tea-polyphenol golden flower black tea powder - Google Patents
High-tea-polyphenol golden flower black tea powder extraction method and high-tea-polyphenol golden flower black tea powder Download PDFInfo
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- CN110613033A CN110613033A CN201910987475.7A CN201910987475A CN110613033A CN 110613033 A CN110613033 A CN 110613033A CN 201910987475 A CN201910987475 A CN 201910987475A CN 110613033 A CN110613033 A CN 110613033A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/166—Addition of, or treatment with, enzymes or microorganisms
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/22—Drying or concentrating tea extract
- A23F3/28—Drying or concentrating tea extract by spraying into a gas stream
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Abstract
The invention discloses a method for extracting high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder. The method comprises the steps of selecting, cleaning, crushing and pretreating golden flower dark green tea serving as a raw material, refining, purifying, concentrating at low temperature and drying to obtain a high-tea-polyphenol powder product, effectively breaking a tea cell structure through enzymolysis treatment of exogenous enzyme preparations, namely cellulase and pectinase, improving the yield of tea polyphenol, effectively reducing the turbidity of an extracting solution through adding the exogenous enzyme preparations, and removing insoluble impurities to obtain the high-clarity dark green tea powder product. And carrying out composting treatment on the extracted golden flower black tea residues, and recycling organic fertilizers to realize comprehensive utilization of resources.
Description
Technical Field
The invention belongs to the technical field of golden flower black tea powder processing, and particularly relates to a method for extracting high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder.
Background
"Shennong tasting Baicao, encountering seventy-two toxins every day, getting teas and" teas ", that is, the tea we now say. The history of tea is throughout the history of the Chinese nation. It can be said that tea is obtained when human activities begin and becomes part of our daily life together with diesel oil salt. Besides the drinking property, the tea is planted in Chinese culture as a culture root and becomes an indispensable part of Chinese culture.
Tea polyphenol is a soluble component with the largest content in tea, is a main active substance with the functions of regulating blood fat, blood sugar, immunoregulation and the like, and is most typically catechin. Tea powder on the market at the present stage mostly exists in the form of directly crushed tea, and a great application technology barrier exists in the application of terminal products and corresponding health care functions, so that the golden flower black tea has the characteristics of high tea polyphenol content, abundant raw material sources and the like, and the product cost is further reduced for meeting the industrial market demands and deeply developing the research of the tea deep processing technology.
At present, more tea powder products such as matcha powder are used, because the product has poor photo-thermal stability, the product exists in insoluble fiber substances, and the use condition, the range and other aspects of the product can be considered when the product is used at the rear end.
At present, tea powder mainly relates to the working procedures of selecting, cleaning, drying, crushing and the like. Due to the difference of tea raw materials and tea processing technologies, great difference exists in the actual operation of product production. For example, the problem that the green tea powder is prepared by knowing the color and luster of the raw materials and the production process
The stability of the product is greatly different among batches, so that the application of the product in end products is relatively problematic, and the microbial control of the product is unsatisfactory due to a simple physical crushing process. The invention provides a better basis for later separation and purification by destroying the cell wall structure of tea fiber through exogenous enzyme and removing insoluble impurities through enzymolysis aiming at the advantage that the tea fiber can be treated by a biological enzyme technology.
Disclosure of Invention
The invention discloses a high-tea-polyphenol golden flower black tea powder extraction method and high-tea-polyphenol golden flower black tea powder. And carrying out rough filtration on the golden flower black tea filter residue, and carrying out composting treatment to obtain the organic fertilizer.
According to the invention, the exogenous enzyme preparations cellulase and pectinase are adopted to effectively destroy the cell wall structure of tea leaves, the extraction rate of tea polyphenol is increased, impurities dissolved at high temperature such as cellulose and protein in the tea leaves after high-temperature extraction are effectively treated by the complex enzyme, the clarity of the product is improved, and byproducts are collected for comprehensive utilization. Compared with the prior art, the method has the advantages of simple process and low production cost, solves the problems of low content of tea polyphenol and low clarity, has low requirement on production scale, and is convenient to popularize and apply.
The aim of the invention is achieved by the following measures:
1. a method for extracting high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder are characterized by comprising the following steps:
(1) selecting fermented golden flower dark tea as a raw material, selecting impurities and foreign matters in the golden flower dark tea, primarily cleaning, and crushing for later use;
(2) adding purified water with the mass ratio of 3-7 times into the raw material of the golden flower dark tea with uniform size prepared in the step (1), soaking for 10-40min, adding an exogenous enzyme preparation for treatment, and destroying the cell wall structure of the tea to obtain an enzymolysis treatment solution;
(3) heating and extracting the enzymolysis treatment liquid prepared in the step (2) at the extraction temperature of 80-95 ℃ for 1-3h, performing coarse filtration treatment on filter residues after secondary extraction, combining the two filtrates for later use, and collecting the filter residues for composting;
(4) centrifuging the filtrate prepared in the step (3), and collecting clear liquid;
(5) cooling the clear liquid prepared in the step (4), and performing secondary enzymolysis treatment;
(6) carrying out pasteurization treatment on the enzymolysis liquid prepared in the step (5) to obtain sterilization liquid for later use;
(7) performing secondary centrifugation treatment on the sterilization liquid prepared in the step (6), collecting clear liquid, and performing fine filtration treatment;
(8) and (4) concentrating the filtrate prepared in the step (7) at low temperature, and performing spray drying to obtain the high-tea-polyphenol golden flower dark tea powder product.
2. The method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the raw material selected in the step (1) is a raw material of more than two grades of raw dark green tea in the Anhua region of Hunan province, and the raw material has high tea polyphenol content and low tea stalk content;
3. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the cleaning in the step (1) aims at removing impurities such as silt and the like in the raw materials, the crushing size is 4cm, the texture is uniform, and the extraction is relatively uniform;
4. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the soaking time of the purified water in the step (2) is 20min, and the tea leaves are soft and soft in soaking in the time period, so that the time is saved;
5. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the exogenous enzyme preparation in the step (2) comprises but is not limited to one or more of pectinase and cellulase. Adding enzyme 0.05%, treating at 40 deg.C for 20 min;
6. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the extraction temperature in the step (3) is 90 ℃, the extraction time is 1h, and the extraction is carried out for 2 times;
7. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the coarse filtering precision in the step (3) is 80 meshes;
8. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the centrifugation conditions in the steps (4) and (7) are 3000-4000rpm, and the centrifugation is carried out for 5 min;
9. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder of claim 1 are characterized in that: the secondary enzymolysis enzyme preparation in the step (5) is protease, the addition amount is 0.04%, and the enzymolysis temperature is 35 ℃;
10. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: in the step (6); the pasteurization temperature is 95-100 deg.C, and 15-30 s. The two functions are that firstly, protease is subjected to enzyme deactivation treatment, but sterilization is performed, and the microbial base number of the product is controlled;
11. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the pasteurized material in the step (7) is cooled to 45 ℃ and then is subjected to fine filtration treatment, wherein the precision is 0.2-2 um;
12. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the low-temperature concentration temperature in the step (8) is 50-55 ℃, and the concentration to spray drying time is controlled to be completed within 3 h;
13. the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: in the step (8), the air inlet temperature of spray drying is 200-220 ℃, and the air outlet temperature is 85-90 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the problems existing in the prior art are as follows: the tea leaves have various contents, but exist in a polymerization form, have low solubility and are easy to have the problem of turbidity after cooling; secondly, the tea leaves are extracted at high temperature, so that the content of impurities is high, and the prepared product has poor solubility and low clarity; thirdly, the problem of processing the by-products after the tea is soaked and extracted is solved; fourthly, the traditional process causes low content of tea polyphenol, poor solubility and more precipitates, and is not beneficial to the application of products in the later period; the tea leaves after the tea leaves are extracted are generally discarded as wastes, resources are not reasonably utilized, not only is the waste of resources caused, but also the environmental pollution is brought.
The invention effectively solves the problems, and by adopting a secondary exogenous enzyme technology, the product yield is improved, and on the other hand, redundant insoluble impurities are removed by enzymolysis, so that the clarity of the product is improved, and the application of the product in a final product is facilitated; aiming at the characteristic that multi-classification substances are polymerized and precipitated, after decompression concentration, spray drying is carried out while the substances are hot, and the concentration time is controlled to be completed within 3 hours, so that the content of tea polyphenol is improved.
Detailed Description
The invention is further illustrated by the following examples, which are intended for illustrative purposes only and do not limit the scope of the invention. The test methods in the following examples, which are not specified under specific conditions, are generally carried out under conventional conditions.
Example 1:
1) selecting 1kg of golden flower dark tea, carrying out pretreatment such as cleaning and crushing, adding 5 times (namely 5 kg) of purified water, and soaking for 20min at room temperature;
2) adding 0.05% enzyme preparation into the soaked material, and performing enzymolysis at 40 deg.C for 20 min;
3) extracting the material subjected to enzymolysis at high temperature at 90 deg.C for 1.5h, coarse filtering, adding 3 times (3 kg) of purified water into the residue, and repeating the extraction;
4) mixing the 2 times of extraction filtrates, cooling, centrifuging at 4000rpm for 5 min;
5) performing secondary enzymolysis on the centrifugate, wherein the enzymolysis time is 20min at 35 ℃ by 0.04% of protease;
6) the secondary enzymolysis liquid adopts pasteurization technology at 95 ℃ for 20S;
7) cooling the pasteurized liquid to 45 ℃, and carrying out fine filtration treatment of 0.5 um;
8) collecting fine filtrate, vacuum concentrating at 55 deg.C, and spray drying with 20% Brix to obtain 160.1g product with content of 85.3%.
Example 2:
2) selecting 2kg of golden flower dark tea, carrying out pretreatment such as cleaning and crushing, adding 4 times (namely 8 kg) of purified water, and soaking for 20min at room temperature;
2) adding 0.05% enzyme preparation into the soaked material, and performing enzymolysis at 40 deg.C for 20 min;
3) extracting the material subjected to enzymolysis at high temperature at 90 deg.C for 1.5h, coarse filtering, adding 3 times (6 kg) of purified water into the obtained residue, and repeating the extraction once;
4) mixing the 2 times of extraction filtrates, cooling, centrifuging at 4000rpm for 5 min;
5) performing secondary enzymolysis treatment on the centrifugate, wherein the enzymolysis time is 25min at 40 ℃ by using 0.04% protease;
6) the secondary enzymolysis liquid adopts pasteurization technology of 90 ℃ and 15S;
7) cooling the pasteurized liquid to 40 ℃, and carrying out fine filtration treatment of 1.0 um;
8) collecting fine filtrate, vacuum concentrating at 60 deg.C, and spray drying with 25% Brix to obtain product 305g with 83.5% content.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A method for extracting high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder are characterized by comprising the following steps:
(1) selecting fermented golden flower dark tea as a raw material, selecting impurities and foreign matters in the golden flower dark tea, primarily cleaning, and crushing for later use;
(2) adding purified water with the mass ratio of 3-7 times into the raw material of the golden flower dark tea with uniform size prepared in the step (1), soaking for 10-40min, adding an exogenous enzyme preparation for treatment, and destroying the cell wall structure of the tea to obtain an enzymolysis treatment solution;
(3) heating and extracting the enzymolysis treatment liquid prepared in the step (2) at the extraction temperature of 80-95 ℃ for 1-3h, performing coarse filtration treatment on filter residues after secondary extraction, combining the two filtrates for later use, and collecting the filter residues for composting;
(4) centrifuging the filtrate prepared in the step (3), and collecting clear liquid;
(5) cooling the clear liquid prepared in the step (4), and performing secondary enzymolysis treatment;
(6) carrying out pasteurization treatment on the enzymolysis liquid prepared in the step (5) to obtain sterilization liquid for later use;
(7) performing secondary centrifugation treatment on the sterilization liquid prepared in the step (6), collecting clear liquid, and performing fine filtration treatment;
(8) and (4) concentrating the filtrate prepared in the step (7) at low temperature, and performing spray drying to obtain the high-tea-polyphenol golden flower dark tea powder product.
2. The method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the raw material selected in the step (1) is a raw material of more than two grades of raw dark green tea in the Anhua region of Hunan province, and the raw material has high tea polyphenol content and low tea stalk content; the cleaning in the step (1) aims to remove impurities such as silt and the like in the raw materials, the crushing size is 4cm, the texture is uniform, and the extraction is uniform.
3. The method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the soaking time of the purified water in the step (2) is 20min, and the tea leaves are soft and soft in soaking in the time period, so that the time is saved;
the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the exogenous enzyme preparation in the step (2) comprises but is not limited to one or more of pectinase and cellulase;
the enzyme adding amount is 0.05 percent, the enzyme treatment temperature is 40 ℃, and the treatment time is 20 min.
4. The method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the extraction temperature in the step (3) is 90 ℃, the extraction time is 1h, and the extraction is carried out for 2 times; the coarse filtering precision in the step (3) is 80 meshes.
5. The method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the centrifugation conditions in the steps (4) and (7) are 3000-4000rpm and 5 min.
6. The method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder of claim 1 are characterized in that: in the step (5), the secondary enzymolysis enzyme preparation is protease, the addition amount is 0.04%, and the enzymolysis temperature is 35 ℃.
7. The method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: in the step (6); the pasteurization temperature is 95-100 deg.C, and 15-30 s.
8. The two functions are that firstly, protease is subjected to enzyme deactivation treatment, but sterilization is performed, and the microbial base number of the product is controlled;
the method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: and (3) cooling the pasteurized material in the step (7) to 45 ℃, and then performing fine filtration treatment with the precision of 0.2-2 um.
9. The method for extracting the high-tea-polyphenol golden flower black tea powder and the high-tea-polyphenol golden flower black tea powder as claimed in claim 1, wherein the method comprises the following steps: the low-temperature concentration temperature in the step (8) is 50-55 ℃, and the concentration to spray drying time is controlled to be completed within 3 h; in the step (8), the air inlet temperature of spray drying is 200-220 ℃, and the air outlet temperature is 85-90 ℃.
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Application publication date: 20191227 |