CN113303374A - Camellia nitidissima brick tea and processing method thereof - Google Patents
Camellia nitidissima brick tea and processing method thereof Download PDFInfo
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Classifications
-
- 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
- A23F3/06—Treating tea before extraction; Preparations produced thereby
-
- 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
- A23F3/06—Treating tea before extraction; Preparations produced thereby
- A23F3/08—Oxidation; Fermentation
-
- 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
- A23F3/06—Treating tea before extraction; Preparations produced thereby
- A23F3/08—Oxidation; Fermentation
- A23F3/10—Fermentation with addition of microorganisms or enzymes
Abstract
The invention discloses a golden flower brick tea and a processing method thereof. The processing method of the golden camellia brick tea mainly comprises the following steps: taking tea leaves, and blending to obtain a tea blank; steaming and softening the tea blank, placing the tea blank in a mould, and compacting and shaping; placing the mixture and the mould in a drying room, and culturing and growing flowers under the conditions of constant temperature and constant humidity; reducing humidity, drying, taking out of the drying room, cooling and packaging. After the brick tea obtained by processing is cultivated for 4-7 days under the condition of constant temperature and constant humidity, golden flowers grow up gradually on the surface of the brick tea, and the golden flowers grow inwards from the surface after being cultivated for 12-18 days and are gradually distributed in each area of the brick tea; the process breaks through the situation that the traditional brick tea product can only be limited to the situation that golden flowers are arranged in the brick or a small number of golden flowers are arranged on the upper surface and the lower surface of the brick, the 6 surfaces of the brick tea and the flowers in the brick are densely distributed, the taste is mellow, the fungus fragrance is strong, the process is not limited by tea, and the process can be used for the flowering of six big tea types of black tea, green tea, oolong tea, yellow tea, black tea and white tea.
Description
Technical Field
The invention relates to the technical field of brick tea processing, in particular to a full golden flower brick tea and a processing method thereof.
Background
Eurotium cristatum, commonly known as golden flower, is an enzyme-type bacterium beneficial to human body. The golden flower can secrete amylase and oxidase, can catalyze the conversion of protein and starch in the tea into monosaccharide, and catalyze the oxidation of polyphenol compounds into substances beneficial to human bodies. The golden flower is an important standard for judging the quality of the brick tea, the more the golden flower is contained in the brick tea, the higher the quality grade of the brick tea is, the more mellow the taste of the tea is, and the more intense the fungus fragrance is.
The black tea brick tea in the existing market basically has flowers in the brick, and the surface of the brick tea has no flowers or slightly golden flowers, and in the Chinese patent 'CN 201610529149.8 a brick tea manufacturing method', the brick tea is cultivated in a baking room with constant temperature and constant humidity at the temperature of 29 ℃ and the humidity of 30% for 6-15 days, and golden flowers are formed on the surface of the brick tea; however, the humidity of the baking room in the method is only 30 percent, and the humidity is relatively low, so that the rapid growth and the propagation of eurotium cristatum are not facilitated, and the quality and the content of the golden flowers are not ideal.
In a patent CN201510998514.5 brick tea double-sided flowering process, a brick tea flowering process is disclosed, three stages of high temperature and high humidity, medium temperature and humidity, low temperature and low humidity and drying are adopted, and finally, golden flowers are uniformly distributed on two surfaces of the brick tea; however, the temperature range of the flowering process is too wide, the temperature and the humidity need to be adjusted for many times, the operation process is too complex, the growth environment of eurotium cristatum is unstable, the stable growth of golden flowers is not facilitated, the golden flowers are uniformly distributed on the front surface and the back surface of the brick tea, and the content of the golden flowers is not high.
Disclosure of Invention
The invention aims to provide a golden camellia brick tea and a processing method thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the processing method of the golden flower brick tea comprises the following steps;
(1) selecting tea leaves of different grades, blending to obtain tea blanks, adding tea juice, and fully stirring until the tea juice is completely absorbed for later use;
(2) putting the shaping grinding tool in a steam environment in advance, and steaming;
(3) weighing the tea blank prepared in the step (1), and steaming the tea blank in a steam environment to obtain a steam softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing the pressing plate for shaping, and cooling;
(5) placing the mold and the mold in a drying room without demolding, and culturing and growing the flowers under the conditions of constant temperature and constant humidity;
(6) after 7-10 days of cultivation, demolding to obtain golden flower brick tea with all surfaces covered;
(7) continuously placing the demoulded brick tea in a drying room, and culturing the golden flowers in the brick tea under the conditions of constant temperature and constant humidity; after 12-18 days of cultivation, the inside and outside golden flowers of the brick tea are fully distributed;
(8) reducing humidity, gradually heating and drying for 15-25 days, detecting water content of the brick tea, taking out of the drying room when the water content is less than or equal to 8%, cooling and packaging.
Further, the processing method of the golden camellia full-flower brick tea comprises the following steps;
(1) selecting tea leaves of different grades, blending to obtain a tea blank, adding tea juice, and fully and uniformly stirring until the water content of the tea blank is 20% -23%; standing for 2-3 h until the tea juice is completely absorbed for later use;
(2) placing the shaping grinding tool in a steam environment with the temperature of 135-155 ℃ in advance, and steaming for 1-2 min;
(3) weighing the tea blank prepared in the step (1), and steaming for 7-10 s in a steam environment at the temperature of 135-155 ℃ to obtain a steam-softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing and shaping by a pressing plate, and cooling to 25-40 ℃;
preferably, the shaping grinding tool is a stainless steel mould, and the shaping pressing plate is a food-grade PU pressing plate; the pressing plate is cooled to 25-40 ℃ after being compressed and shaped, so that the tea blank is shrunk, the water in the pressing plate is absorbed, and the tea blank is prevented from mildewing;
(5) placing the mold and the mold in a drying room without demolding, and culturing and growing the flowers under the conditions of constant temperature and constant humidity;
(6) after 7-10 days of cultivation, demolding to obtain brick tea with all surfaces covered with golden flowers;
(7) continuously placing the demoulded brick tea in a drying room, and culturing the golden flowers in the brick tea under the conditions of constant temperature and constant humidity; after 12-18 days of cultivation, the inside and outside golden flowers of the brick tea are fully distributed;
preferably, the drying room is an intelligent drying room, and a temperature controller is used for controlling a temperature switch; during heat supply, the temperature change range can be accurately reduced according to the length of heat supply time, the temperature can be accurately controlled to +/-0.5 ℃, and stable constant temperature conditions are provided for stable growth of the golden flowers.
(8) Reducing the humidity to 20-45%, gradually heating and drying for 15-25 days, detecting the water content of the brick tea, taking the brick tea out of a drying room when the water content is less than or equal to 8%, cooling and packaging.
Further, the constant temperature and humidity conditions in the step (5) are specifically as follows: the temperature was 28 ℃ and the relative humidity was 75. + -. 3%.
Further, the constant temperature and humidity conditions in the step (7) are specifically as follows: the temperature was 28 ℃ and the relative humidity was 70. + -. 3%.
Further, the density of the tea blank in the step (1) is 0.55-0.75 g/cm3。
The method for blending the dark green tea into the tea blank in the step (1) comprises the following specific steps:
s1, taking the raw dark green tea with different grades, sieving to remove impurities and remove tea stalks;
the traditional brick tea flowering process requires that the tea needs to have a certain stem content, but the stem of the tea is removed in advance, and the tea without the tea stem can grow into good golden flowers through the process.
S2, spraying a mixed solution of trehalose, pectinase, tannase and sodium alginate on the surface of the tea leaves treated in the step S1, controlling the water content to be 18-26%, carrying out pile fermentation for 5-7 h under the conditions that the temperature is 45-48 ℃ and the humidity is 70-75%, and blending to obtain tea blanks; the mass ratio of the trehalose to the pectinase to the tannase to the sodium alginate in the mixed solution is 5:3:3: 1.
The golden flower brick tea is processed by the processing method.
The tea is pretreated by adopting the trehalose and the pectinase, and the pectinase and the tannase can promote the flavor conversion of the tea in the pile fermentation process and increase theaflavin, so that the brick tea is mellow in taste and bright in color; the natural trehalose and sodium alginate provide a nutrient medium required by growth of eurotium cristatum, promote growth and propagation of golden flowers and improve the content and quality of the golden flowers; the trehalose is natural edible polysaccharide, and a small amount of residual trehalose left after the blossoming can be absorbed by human bodies without any harm; the sodium alginate has spectrum sterilization and bacteriostasis, and can effectively prevent the brick tea from breeding bacteria and mildewing.
Compared with the prior art, the invention has the following beneficial effects:
the invention breaks through the situation that the brick tea product in the past can only be limited to the situation that golden flowers are arranged in the brick or a small amount of golden flowers are arranged on the upper surface and the lower surface of the brick tea, realizes that 6 surfaces of the brick tea and the flowers in the brick are densely distributed, not only the quantity is multiplied and the particles are large, but also the fragrance is consistent with the fragrance of fungus flowers on the surfaces of the bricks in other brick tea bricks, and the brick tea has no mildew or peculiar smell; the hair growing process is not limited by tea, and can be used for growing hair of six kinds of tea, namely black tea, green tea, oolong tea, yellow tea, dark tea and white tea.
Compared with the conventional technology, the invention adopts the special stainless steel mould and the edible pressing plate to press the tea into the brick tea, and the mellow taste of the tea cannot be damaged in the pressing process, and new impurities cannot be brought. In the process of flowering, the stainless steel mould is not removed from the mould, and the stainless steel mould can control the gradual and trace loss of the water in the brick tea, so that the water on each 6 surfaces of the brick tea is relatively stable, and a stable water condition is provided for the growth of golden flowers.
According to the invention, before the brick tea blooms, the mold and the tea blank are steamed at 135-155 ℃, so that not only can bacteria in the mold and the tea blank be removed, but also the softening degree of the tea blank can be improved, and good conditions are provided for subsequent blossoming. In the conventional flowering process, the temperature range is wide, the temperature fluctuation range is large, and the growth and the propagation of eurotium cristatum are not facilitated; according to the method, an intelligent drying room is adopted, the temperature of the drying room is accurately controlled, the temperature of the drying room is kept constant at 28 ℃, the temperature is most beneficial to the growth and the propagation of eurotium cristatum, and the quality and the growth speed of the golden flowers can be improved due to the constant temperature; in addition, the mold is not removed before the brick tea enters the drying room, so that the loss of water on the surface of the brick tea is avoided, and the effect of flowering on the surface of the brick tea is influenced. According to the invention, through the accurate control of the steaming, the die, the pressing plate, the constant temperature and the constant humidity and other conditions, after the brick tea is cultivated for 7-10 days under the constant temperature and the constant humidity, 6 golden flowers on the surface of the brick tea gradually grow, the golden flowers continue to grow from the surface to the inside after being cultivated for 12-18 days, and are gradually distributed in each area of the brick tea, and finally, the effect of full-face flowering without dead angles can be achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a photograph showing the growth of golden flowers on the surface of the dark green brick tea processed in comparative example 1;
FIG. 2 is a photograph showing the growth of the golden flower of the dark tea brick tea processed in example 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The processing method of the golden flower brick tea comprises the following steps;
(1) sieving green tea of different grades to remove impurities and remove tea stalks; spraying a mixed solution of trehalose, pectinase, tannase and sodium alginate on the surface of green tea, controlling the water content at 18%, carrying out pile fermentation for 5-7 h at the temperature of 45-48 ℃ and the humidity of 70-75%, blending to form a tea blank, adding green tea juice, and fully and uniformly stirring until the water content of the tea blank is 20%; standing for 2h until the tea juice is completely absorbed for later use; the tea blank density is 0.6g/cm3；
(2) Placing the shaping grinding tool in a steam environment with the temperature of 135 ℃ in advance, and steaming for 1 min;
(3) weighing the tea blank prepared in the step (1), and steaming for 7s in a steam environment at the temperature of 135 ℃ to obtain a steam-softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing and shaping by a pressing plate, and cooling to 25 ℃;
(5) placing the mold and the mold in a drying room without demolding, and culturing and growing the flowers under the conditions of constant temperature and constant humidity; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 72%;
(6) after 7 days of cultivation, demolding to obtain green tea brick tea with golden flowers on all surfaces;
(7) continuously placing the demoulded green tea brick tea in a drying room, and culturing the golden flower in the green tea brick tea under the conditions of constant temperature and constant humidity; after 15 days of cultivation, the inside and the outside of the green tea brick tea are fully covered with the golden flowers; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 67%;
(8) reducing the humidity to 20%, gradually heating and drying for 15 days, detecting the water content of the green tea brick tea, taking out of the drying room when the water content is less than or equal to 8%, cooling and packaging.
In the embodiment, the shaping grinding tool is a stainless steel mould, and the shaping pressing plate is a food-grade PU pressing plate; the drying room is an intelligent drying room, and a temperature controller is used for controlling a temperature switch; during heat supply, the temperature change range can be accurately reduced according to the length of heat supply time, the temperature can be accurately within +/-0.5 ℃, and stable constant temperature conditions are provided for stable growth of the golden flowers.
Example 2
The processing method of the golden flower brick tea comprises the following steps;
(1) selecting black raw tea with different grades, blending to obtain a tea blank, adding black raw tea juice, and fully and uniformly stirring until the water content of the tea blank is 20%; standing for 2h until the tea juice is completely absorbed for later use; the tea blank density is 0.6g/cm3；
(2) Placing the shaping grinding tool in a steam environment with the temperature of 135 ℃ in advance, and steaming for 1 min;
(3) weighing the tea blank prepared in the step (1), and steaming for 7s in a steam environment at the temperature of 135 ℃ to obtain a steam-softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing and shaping by a pressing plate, and cooling to 30 ℃;
(5) placing the mold and the mold in a drying room without demolding, and culturing and growing the flowers under the conditions of constant temperature and constant humidity; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 75%;
(6) after 7 days of cultivation, demolding to obtain black tea brick tea with golden flowers on all surfaces;
(7) continuously placing the demoulded black tea brick tea in a drying room, and culturing the golden flower in the black tea brick tea under the conditions of constant temperature and constant humidity; after 15 days of cultivation, the inside and the outside of the brick tea of the dark tea are covered with the golden flowers; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 70%;
(8) reducing the humidity to 35%, gradually heating and drying for 20 days, detecting the water content of the black tea brick tea, taking the black tea brick tea out of a drying room when the water content is less than or equal to 8%, cooling and packaging.
In the embodiment, the shaping grinding tool is a stainless steel mould, and the shaping pressing plate is a food-grade PU pressing plate; the drying room is an intelligent drying room, and a temperature controller is used for controlling a temperature switch; during heat supply, the temperature change range can be accurately reduced according to the length of heat supply time, the temperature can be accurately within +/-0.5 ℃, and stable constant temperature conditions are provided for stable growth of the golden flowers.
Example 3
The processing method of the golden flower brick tea comprises the following steps;
(1) selecting black raw tea with different grades, blending to obtain a tea blank, adding black raw tea juice, and fully and uniformly stirring until the water content of the tea blank is 23%; standing for 3h until the tea juice is completely absorbed for later use; the tea blank density is 0.6g/cm3；
(2) Placing the shaping grinding tool in a steam environment with the temperature of 155 ℃ in advance, and steaming for 2 min;
(3) weighing the tea blank prepared in the step (1), and placing the tea blank in a steam environment with the temperature of 155 ℃ for 10s to obtain a steam-softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing and shaping by a pressing plate, and cooling to 40 ℃;
(5) placing the mold and the mold in a drying room without demolding, and culturing and growing the flowers under the conditions of constant temperature and constant humidity; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 78%;
(6) after 10 days of cultivation, demolding to obtain black tea brick tea with golden flowers on all surfaces;
(7) continuously placing the demoulded black tea brick tea in a drying room, and culturing the golden flower in the black tea brick tea under the conditions of constant temperature and constant humidity; after 18 days of cultivation, the inside and the outside of the brick tea of the dark tea are covered with the golden flowers; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 73%;
(8) reducing the humidity to 45%, gradually heating and drying for 25 days, detecting the water content of the black tea brick tea, taking the black tea brick tea out of a drying room when the water content is less than or equal to 8%, cooling and packaging.
In the embodiment, the shaping grinding tool is a stainless steel mould, and the shaping pressing plate is a food-grade PU pressing plate; the drying room is an intelligent drying room, and a temperature controller is used for controlling a temperature switch; during heat supply, the temperature change range can be accurately reduced according to the length of heat supply time, the temperature can be accurately within +/-0.5 ℃, and stable constant temperature conditions are provided for stable growth of the golden flowers.
Example 4
The processing method of the golden flower brick tea comprises the following steps;
(2) selecting black tea with different grades, blending to obtain a tea blank, adding black tea juice, and fully and uniformly stirring until the water content of the tea blank is 23%; standing for 2h until the tea juice is completely absorbed for later use; the tea blank density is 0.6g/cm3；
(2) Placing the shaping grinding tool in a steam environment with the temperature of 135 ℃ in advance, and steaming for 1 min;
(3) weighing the tea blank prepared in the step (1), and steaming for 7s in a steam environment at the temperature of 135 ℃ to obtain a steam-softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing and shaping by a pressing plate, and cooling to 30 ℃;
(5) placing the mold and the mold in a drying room without demolding, and culturing and growing the flowers under the conditions of constant temperature and constant humidity; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 75%;
(6) after 7 days of cultivation, demolding to obtain black tea brick tea with golden flowers on all surfaces;
(7) continuously placing the black tea brick tea after the mold stripping in a drying room, and cultivating golden flowers in the black tea brick tea under the conditions of constant temperature and constant humidity; after 15 days of cultivation, the inner and outer golden flowers of the black tea brick tea are fully distributed; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 70%;
(8) reducing the humidity to 45%, gradually heating and drying for 25 days, detecting the water content of the black tea brick tea, taking the black tea brick tea out of a drying room when the water content is less than or equal to 8%, cooling and packaging.
In the embodiment, the shaping grinding tool is a stainless steel mould, and the shaping pressing plate is a food-grade PU pressing plate; the drying room is an intelligent drying room, and a temperature controller is used for controlling a temperature switch; during heat supply, the temperature change range can be accurately reduced according to the length of heat supply time, the temperature can be accurately within +/-0.5 ℃, and stable constant temperature conditions are provided for stable growth of the golden flowers.
Comparative example 1
The processing method of the golden flower brick tea comprises the following steps;
(1) selecting black raw tea with different grades, blending to obtain a tea blank, adding black raw tea juice, and fully and uniformly stirring until the water content of the tea blank is 20%; standing for 2h until the tea juice is completely absorbed for later use; the tea blank density is 0.6g/cm3；
(2) Placing the shaping grinding tool in a steam environment with the temperature of 135 ℃ in advance, and steaming for 1 min;
(3) weighing the tea blank prepared in the step (1), and steaming for 7s in a steam environment at the temperature of 135 ℃ to obtain a steam-softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing and shaping by a pressing plate, and cooling to 30 ℃;
(5) demolding, culturing and growing flowers under the conditions of constant temperature and constant humidity; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 75%;
(6) after 7 days of cultivation, obtaining the black tea brick tea with the golden flowers on the surface;
(7) continuously placing the tea leaves in a drying room, and culturing the golden flowers in the black tea brick tea under the conditions of constant temperature and constant humidity; after 15 days of cultivation, the inside and the outside of the brick tea of the dark tea are covered with the golden flowers; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 70%;
(8) reducing the humidity to 35%, gradually heating and drying for 20 days, detecting the water content of the black tea brick tea, taking the black tea brick tea out of a drying room when the water content is less than or equal to 8%, cooling and packaging.
In the embodiment, the shaping grinding tool is a stainless steel mould, and the shaping pressing plate is a food-grade PU pressing plate; the drying room is an intelligent drying room, and a temperature controller is used for controlling a temperature switch; during heat supply, the temperature change range can be accurately reduced according to the length of heat supply time, the temperature can be accurately within +/-0.5 ℃, and stable constant temperature conditions are provided for stable growth of the golden flowers.
Compared with the example 2, the brick tea softened by steam in the comparative example is demoulded and then enters a drying room with constant temperature and humidity for further cultivation and flowering.
Comparative example 2
The processing method of the golden flower brick tea comprises the following steps;
(1) selecting black raw tea with different grades, blending to obtain a tea blank, adding black raw tea juice, and fully and uniformly stirring until the water content of the tea blank is 20%; standing for 2h until the tea juice is completely absorbed for later use; the tea blank density is 0.6g/cm3；
(2) Placing the shaping grinding tool in a steam environment with the temperature of 135 ℃ in advance, and steaming for 1 min;
(3) weighing the tea blank prepared in the step (1), and steaming for 7s in a steam environment at the temperature of 135 ℃ to obtain a steam-softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing and shaping by a pressing plate, and cooling to 30 ℃;
(5) placing the mold and the mold in a drying room without demolding, and culturing and growing the flowers under the conditions of constant temperature and constant humidity; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 75%;
(6) after 7 days of cultivation, demolding to obtain black tea brick tea with golden flowers on all surfaces;
(7) continuously placing the demoulded black tea brick tea in a drying room, and culturing the golden flower in the black tea brick tea under the conditions of constant temperature and constant humidity; after 15 days of cultivation, the inside and the outside of the brick tea of the dark tea are covered with the golden flowers; the conditions of constant temperature and humidity are as follows: the temperature is 28 ℃, and the relative humidity is 70%;
(8) reducing the humidity to 35%, gradually heating and drying for 20 days, detecting the water content of the black tea brick tea, taking the black tea brick tea out of a drying room when the water content is less than or equal to 8%, cooling and packaging.
The design grinding apparatus in this embodiment selects to be stainless steel mould for use, and food level PU material clamp plate is selected to the design clamp plate. Compared with the embodiment 2, the constant temperature and humidity environment is provided by a conventional drying room, and the control error of the temperature is relatively large.
Examples of effects
The black tea brick tea processed in the example 2 and the comparative example 1 is selected, and the appearance golden flower pictures are shown in the following figures respectively.
FIG. 1 is a photograph of a black tea brick processed in comparative example 1, and FIG. 2 is a photograph of a black tea brick processed in example 2; as is obvious from the pictures, the six surfaces of the black tea brick tea processed by the method and the interior of the brick tea are uniformly distributed with golden flowers, the color is golden yellow, and no dead angle is formed; the surfaces of the black tea brick tea prepared by the conventional flowering process of the comparative example 1 are sporadically distributed with golden flowers, and the golden flowers are low in content and uneven in distribution.
Taking the black tea brick tea processed in the examples 1-3 and the comparative examples 1-2, determining the quantity of eurotium cristatum in the black tea brick tea by a gradient dilution-coating plate culture method specified in the food safety national standard food microbiology inspection general rule, and detecting the quantity of the eurotium cristatum in the black tea brick tea, wherein the detection result is shown in the following table 1; the flowering rate and the mildew rate of the black tea brick tea are measured, and the detection results are shown in the following table 1;
| example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | |
| Eurotium cristatum cfu/g | 6.75×106 | 5.67×106 | 5.53×106 | 5.47×105 | 2.84×105 |
| Other fungi cfu/g | 1.29×103 | 6.76×103 | 6.88×103 | 4.92×104 | 6.35×104 |
| Percentage of flowering | 99.6 | 98.8 | 98.3 | 77.3 | 91.5 |
| Percent mildew rate% | 0 | 0 | 0 | 0 | 8 |
TABLE 1
GB/T32719.5-2018 Black tea part 5: fu tea (Fu tea)The physicochemical indexes of Zhongfu tea are specified as follows: the content of Eurotium cristatum is not less than 20 × 104cfu/g, the Eurotium cristatum in the processed Manhua dark green tea brick tea in the application examples 1-3 is as high as 5.50 multiplied by 106cfu/g and above, far above the qualified range specified by the standard, and the content of other fungi is lower than 7.0 multiplied by 103(ii) a Therefore, the black tea flowering process provided by the scheme is higher in flowering efficiency and higher in golden flower quality. While the Eurotium cristatum in the dark tea brick tea prepared in the comparison documents 1 and 2 is 5.47 × 105cfu/g and 2.84X 105cfu/g, which only meets the standard of qualified products, and the content of other fungi is higher than that in examples 1-3.
As can be seen from the data in Table 1, the brick tea processed in the embodiments 1-3 of the invention has a flowering rate of more than 98% and a high flowering content, wherein the raw dark green tea in the embodiment 1 is treated by a mixed solution of trehalose, pectinase, tannase and sodium alginate in advance in the blending process, and the flowering effect of the processed raw dark green brick tea is better than that of the black tea in the embodiments 2-3. Compared with the embodiment 2, the brick tea is subjected to demoulding and then enters a drying room for cultivation and flowering, so that the surface water loss is fast, the growth and the propagation of golden flowers are not facilitated, compared with the embodiment 2, the temperature control accuracy is low in the comparative example 2, the environment for the growth of the golden flowers is unstable, and finally the flowering rate of the black tea brick tea prepared in the comparative example 1 and the comparative example 2 is greatly reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The processing method of the golden flower brick tea is characterized in that; comprises the following steps;
(1) selecting tea leaves of different grades, blending to obtain tea blanks, adding tea juice, and fully stirring until the tea juice is completely absorbed for later use;
(2) putting the shaping grinding tool in a steam environment in advance, and steaming;
(3) weighing the tea blank prepared in the step (1), and steaming the tea blank in a steam environment to obtain a steam softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing the pressing plate for shaping, and cooling;
(5) placing the mold and the mold in a drying room without demolding, and culturing and growing the flowers under the conditions of constant temperature and constant humidity;
(6) after 7-10 days of cultivation, demolding to obtain brick tea with all surfaces covered with golden flowers;
(7) continuously placing the demoulded brick tea in a drying room, and culturing the golden flowers in the brick tea under the conditions of constant temperature and constant humidity; after 12-18 days of cultivation, the inside and outside golden flowers of the brick tea are fully distributed;
(8) reducing humidity, gradually heating and drying for 15-25 days, detecting water content of the brick tea, taking out of the drying room when the water content is less than or equal to 8%, cooling and packaging.
2. The method for processing golden camellia brick tea as claimed in claim 1, wherein; comprises the following steps;
(1) selecting tea leaves of different grades, blending to obtain tea blank, adding tea juice, and fully stirring until the water content of the tea blank is 20-23%; standing for 2-3 h until the tea juice is completely absorbed for later use;
(2) placing the shaping grinding tool in a steam environment with the temperature of 135-155 ℃ in advance, and steaming for 1-2 min;
(3) weighing the tea blank prepared in the step (1), and steaming for 7-10 s in a steam environment at the temperature of 135-155 ℃ to obtain a steam-softened tea blank;
(4) placing the steamed and softened tea blank in the shaping grinding tool steamed in the step (2), pressing and shaping by a pressing plate, and cooling to 25-40 ℃;
(5) placing the mold and the mold in a drying room without demolding, and culturing and growing the flowers under the conditions of constant temperature and constant humidity;
(6) after 7-10 days of cultivation, demolding to obtain brick tea with all surfaces covered with golden flowers;
(7) continuously placing the demoulded brick tea in a drying room, and culturing the golden flowers in the brick tea under the conditions of constant temperature and constant humidity; after 12-18 days of cultivation, the inside and outside golden flowers of the brick tea are fully distributed;
(8) reducing the humidity to 20-45%, gradually heating and drying for 15-25 days, detecting the water content of the brick tea, taking the brick tea out of a drying room when the water content is less than or equal to 8%, cooling and packaging.
3. The processing method of the golden camellia brick tea as claimed in claim 2, wherein the processing method comprises the following steps: the constant temperature and humidity conditions in the step (5) are as follows: the temperature was 28 ℃ and the relative humidity was 75. + -. 3%.
4. The processing method of the golden camellia brick tea as claimed in claim 2, wherein the processing method comprises the following steps: the constant temperature and humidity conditions in the step (7) are specifically as follows: the temperature was 28 ℃ and the relative humidity was 70. + -. 3%.
5. The processing method of the golden camellia brick tea as claimed in claim 2, wherein the processing method comprises the following steps: the density of the tea blank in the step (1) is 0.55-0.75 g/cm3。
6. The processing method of the golden camellia brick tea as claimed in claim 2, wherein the processing method comprises the following steps: the tea blank blending of the tea leaves in the step (1) comprises the following specific steps:
s1, taking tea leaves of different grades, sieving to remove impurities, and removing tea stalks;
s2, spraying a mixed solution of trehalose, pectinase, tannase and sodium alginate on the surface of the tea leaves treated in the step S1, controlling the water content to be 18-26%, carrying out pile fermentation for 5-7 h under the conditions that the temperature is 45-48 ℃ and the humidity is 70-75%, and blending to obtain tea blanks;
the mass ratio of the trehalose to the pectinase to the tannase to the sodium alginate in the mixed solution is 5:3:3: 1.
7. The golden camellia brick tea processed by the processing method of the golden camellia brick tea as claimed in claims 1 to 6.
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