CN113508849A - Processing method of selenium-rich dark tea - Google Patents
Processing method of selenium-rich dark tea Download PDFInfo
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- CN113508849A CN113508849A CN202110811340.2A CN202110811340A CN113508849A CN 113508849 A CN113508849 A CN 113508849A CN 202110811340 A CN202110811340 A CN 202110811340A CN 113508849 A CN113508849 A CN 113508849A
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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
- A23F3/06—Treating tea before extraction; Preparations produced thereby
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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
- A23F3/06—Treating tea before extraction; Preparations produced thereby
- A23F3/08—Oxidation; Fermentation
- A23F3/10—Fermentation with addition of microorganisms or enzymes
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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
- A23F3/06—Treating tea before extraction; Preparations produced thereby
- A23F3/12—Rolling or shredding tea leaves
Abstract
The invention discloses a processing method of selenium-rich dark tea, belonging to the technical field of dark tea processing, and the processing method comprises the following steps: s1, picking: picking fresh leaves with one bud and one leaf or two leaves with one bud and two leaves from wild tea trees as raw materials; s2, fixation: spreading the picked fresh leaves for 2-4h to obtain spread leaves with water content of 68-72%, and deactivating enzyme at 150-160 deg.C for 6-12min to obtain deactivated leaves; s3, twisting: rolling the killed leaves while the killed leaves are hot until tea juice is kneaded out, and forming tea strips; s4, sterilization: sterilizing the obtained tea leaves by steam at the temperature of 100-120 ℃; s5, fermentation: uniformly mixing the sterilized tea leaves with the selenium-enriched yeast, and fermenting at 35-55 ℃ by using a fermentation device; s6, kneading repeatedly: repeatedly kneading and tightly rolling the fermented tea leaves; s7, charcoal baking: baking the re-kneaded tea leaves with pine charcoal to obtain the selenium-rich dark tea. The invention solves the problem of small intake of selenium element in human body.
Description
Technical Field
The invention relates to the technical field of black tea processing, in particular to a processing method of selenium-rich black tea.
Background
The black tea is named because the appearance of the finished tea is black. The black tea belongs to one of six major tea types, belongs to post-fermented tea, and has main production areas of Guangxi, Sichuan, Yunnan, Hubei, Hunan, Shanxi, Anhui and the like. The raw dark green tea adopted by the traditional dark green tea has higher maturity and is a main raw material for pressing compressed tea. The process for preparing the dark green tea generally comprises four procedures of de-enzyming, rolling, piling and drying. The black tea is distributed according to regions and is mainly classified into Hunan black tea (Fuzhuan tea, Qianliang tea, black brick tea, Sanjian tea and the like), Hubei green brick tea, Sichuan Tibetan tea (Bian tea), Anhui ancient black tea (Ancha), Yunnan black tea (Pu' er ripe tea), Guangxi Liupao tea and Shaanxi black tea (Fuzhuan tea).
Selenium is a trace element essential to the human body. Selenium participates in the synthesis of various selenium-containing enzymes and selenium-containing proteins in the human body. Wherein, the glutathione peroxidase catalyzes hydroperoxides or lipid peroxides to be converted into water or various alcohols in a living body, eliminates the attack of free radicals to the biological membrane and protects the biological membrane from oxidation damage; selenium can improve human immunity, promote proliferation of lymphocyte and synthesis of antibody and immunoglobulin. Selenium has obvious inhibiting and protecting effects on colon cancer, skin cancer, liver cancer, breast cancer and other cancers, and an intermediate metabolite methyl enol in a body has strong anticancer activity. Meanwhile, selenium has the effect of relieving and alleviating heavy metal toxicity.
The traditional tea making process of the dark tea generally comprises the following steps: picking → de-enzyming → primarily kneading → WoTan → secondarily kneading → baking → finished product, although the tea making method is simple in process, the prepared tea is common black tea, and therefore the invention provides the processing method of the selenium-rich black tea.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a processing method of selenium-rich dark tea, which solves the problem of low selenium intake of human bodies.
In order to achieve the purpose, the invention provides the following technical scheme:
a processing method of selenium-rich dark tea comprises the following steps:
s1 picking
Picking fresh leaves with one bud and one leaf or two leaves with one bud and two leaves from wild tea trees as raw materials;
s2, deactivating enzyme
Spreading the picked fresh leaves for 2-4h to obtain spread leaves with water content of 68-72%, and deactivating enzyme at 150-160 deg.C for 6-12min to obtain deactivated leaves;
s3, twisting
Rolling the enzyme-removed leaves in the step S2 until the tea juice is kneaded out and the tea is formed into strips;
s4, sterilizing
Sterilizing the tea leaves obtained in the step S3 by steam at the temperature of 100-120 ℃;
s5, fermentation
Uniformly mixing the tea leaves sterilized in the step S4 with selenium-enriched yeast, and fermenting for 3-7d at 35-55 ℃ by a fermentation device;
s6, Back-kneading
Repeatedly kneading and tightly winding the tea leaves fermented in the step S5;
s7, charcoal baking
And (5) roasting the tea leaves kneaded in the step (S6) with pine charcoal until the water content is less than 70%, thus obtaining the selenium-rich dark tea.
More preferably: the selenium-rich yeast is one or more of Schizosaccharomyces, Candida utilis and Brevibacterium flavum.
More preferably: the fermentation device comprises a fermentation tank and a plugging mechanism, wherein a feed inlet and a discharge outlet are formed in the fermentation tank;
the fermentation tank is internally provided with a membrane layer which is fixed inside the fermentation tank, the fermentation tank is divided into an upper chamber and a lower chamber through the membrane layer, wherein the upper chamber is internally provided with a stirring mechanism, and the lower chamber is internally provided with a driving mechanism which is used for driving the membrane layer to move up and down and driving the plugging mechanism to plug or open the discharge hole;
the feed inlet is located the fermentation cylinder top, the discharge gate is located the fermentation cylinder lateral part just is in the rete with the fermentation cylinder junction.
More preferably: the driving mechanism comprises an air cylinder, a supporting block, a driving block and a driven block;
the driven block is fixed at the bottom of the film layer, the driving block is supported at the bottom of the driven block, the bottom surface of the driven block is an inclined plane and inclines from bottom to top along the direction close to the cylinder, and the top surface of the driving block is an inclined plane and is matched with the driven block, so that the driving block is in surface-to-surface contact with the driven block;
the supporting block is fixed at the bottom in the fermentation tank, and the air cylinder is installed on the supporting block and is used for driving the driving block to horizontally slide at the bottom in the fermentation tank.
More preferably: the plugging mechanism comprises a connecting rod, a fixing block and a plug;
the connecting rod includes bracing piece and push rod, the bracing piece with the cylinder is connected respectively the relative both sides of initiative piece, bracing piece one end with the initiative piece is fixed, and the other end passes the fermentation cylinder and with the push rod is fixed, the fixed block is located the discharge gate outside just is fixed on the push rod, the end cap is fixed just be used for blockking up on the fixed block the discharge gate.
More preferably: the end cap is round platform form and minor diameter one end is close to the discharge gate, and major diameter one end is close to the fixed block.
More preferably: the fermentation tank lower cavity is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively positioned on two opposite sides of the fermentation tank.
More preferably: the stirring mechanism comprises a motor, a stirring shaft and a stirring paddle;
the motor is installed fermentation cylinder top center, the (mixing) shaft is located in the fermentation cylinder upper chamber and the upper end passes fermentation cylinder top and with motor output shaft, the stirring rake is fixed just be used for the stirring on the (mixing) shaft material in the fermentation cylinder.
More preferably: the stirring paddle is an inclined blade type paddle.
More preferably: the film layer is a silica gel film.
In conclusion, the invention has the following beneficial effects: the invention adopts selenium-enriched yeast for fermentation, greatly improves the content of organic selenium in the black tea, and can effectively reduce the production cost of the selenium-enriched black tea. After the fermentation is completed, the cylinder is started to enable the driven block, the supporting rod, the push rod, the fixing block and the plug to integrally move towards the direction far away from the cylinder, the plug is pulled out of the discharge port at the moment, the driven block drives the film layer to move upwards under the driving of the driving block, and the film layer is gradually changed into a concave state from a concave state at the moment, so that tea leaves can be rapidly discharged outwards through the discharge port conveniently.
Drawings
FIG. 1 is a block flow diagram of an embodiment, which is mainly used for embodying a processing method of the selenium-rich dark tea;
FIG. 2 is a schematic sectional view of an embodiment, which is mainly used for embodying a specific structure of a fermentation apparatus;
fig. 3 is a schematic structural diagram of the embodiment, which is mainly used for embodying the structure of the plugging mechanism.
In the figure, 1, a fermentation tank; 2. a feed inlet; 31. a motor; 32. a stirring shaft; 33. a stirring paddle; 4. a film layer; 5. an air inlet; 6. an air outlet; 71. a cylinder; 72. a support block; 73. an active block; 74. a driven block; 811. a support bar; 812. a push rod; 82. a fixed block; 83. a plug; 9. and (4) a discharge port.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1: a processing method of selenium-rich dark tea is shown in figure 1 and comprises the following steps:
s1 picking
Picking fresh leaves with one bud and one leaf or two leaves with one bud and two leaves from wild tea trees as raw materials;
s2, deactivating enzyme
Spreading the picked fresh leaves for 3h to obtain water-removed leaves with water content of 70%, and deactivating enzyme at 155 deg.C for 8min to obtain deactivated leaves;
s3, twisting
Rolling the enzyme-removed leaves in the step S2 until the tea juice is kneaded out and the tea is formed into strips;
s4, sterilizing
Sterilizing the tea leaves obtained in the step S3 with steam at 110 ℃;
s5, fermentation
Uniformly mixing the tea sterilized in the step S4 with the fission yeast selenium-rich in yeast according to the mass ratio of 100:1, and fermenting for 5d at 40 ℃ by a fermentation device;
s6, Back-kneading
Repeatedly kneading and tightly winding the tea leaves fermented in the step S5;
s7, charcoal baking
And (5) roasting the tea leaves kneaded in the step (S6) with pine charcoal until the water content is less than 70%, thus obtaining the selenium-rich dark tea.
In the technical scheme, the content of general flavone in tea is 2-3%, while the content of general flavone in wild tea is 4.32%, so that the content of general flavone in wild tea is higher; the more the tea polyphenol content is, the better the tea polyphenol content is, the tea polyphenol content of common tea is 21.8%, the tea polyphenol content of wild tea trees is 22.9%, and therefore the tea polyphenol content of the wild tea trees is proper. The common clearance rate of the antioxidant in the tea leaves is 83.84 percent, while the clearance rate of the wild tea trees is 87.89 percent, so the antioxidant content of the wild tea trees is higher. Therefore, compared with common tea, the active nutrient components of the wild tea trees are higher, and the wild tea trees are selected and used for optimizing the raw materials. The invention adopts selenium-enriched yeast for fermentation, greatly improves the content of organic selenium in the black tea, and can effectively reduce the production cost of the selenium-enriched black tea.
Referring to fig. 2-3, the fermentation device comprises a fermentation tank 1 and a plugging mechanism, wherein a feeding hole 2 and a discharging hole 9 are arranged on the fermentation tank 1. Be provided with rete 4 in the fermentation cylinder 1, rete 4 is oval form and fixes inside fermentation cylinder 1 to two upper and lower cavities are separated into through rete 4 to messenger fermentation cylinder 1, and rete 4 is the pellosil. Wherein, the upper chamber of the fermentation tank 1 is provided with a stirring mechanism, and the lower chamber is provided with a driving mechanism for driving the film layer 4 to move up and down and driving the plugging mechanism to plug or open the discharge hole 9. The feed inlet 2 is positioned at one side of the top of the fermentation tank 1, and the discharge outlet 9 is positioned at the side part of the fermentation tank 1 and at the joint of the membrane layer 4 and the fermentation tank 1.
Referring to fig. 2-3, the drive mechanism preferably includes a cylinder 71, a support block 72, a drive block 73, and a driven block 74. The driven block 74 is fixed at the center of the bottom of the film layer 4, the driving block 73 is supported at the bottom of the driven block 74, the bottom surface of the driven block 74 is an inclined surface and inclines from bottom to top along the direction close to the cylinder 71, and the top surface of the driving block 73 is an inclined surface and is matched with the driven block 74, so that the driving block 73 is in surface-to-surface contact with the driven block 74. The driving block 73 is positioned between the driven block 74 and the bottom in the fermentation tank 1, the supporting block 72 is fixed at the bottom in the fermentation tank 1, and the air cylinder 71 is installed on the supporting block 72 and is used for driving the driving block 73 to horizontally slide at the bottom in the fermentation tank 1.
Referring to fig. 2-3, preferably, the plugging mechanism includes a connecting rod, a fixed block 82 and a plug 83. The connecting rod comprises a supporting rod 811 and a push rod 812, the supporting rod 811 and the cylinder 71 are respectively connected to two opposite sides of the driving block 73, one end of the supporting rod 811 is fixed with the driving block 73, and the other end of the supporting rod 811 penetrates through the lower chamber of the fermentation tank 1 and is fixed with the push rod 812. Push rod 812 is vertical setting and the lower extreme is fixed with bracing piece 811, and the upper end upwards extends, and the connecting rod is provided with two, and two connecting rods are located discharge gate 9 both sides respectively. The fixing block 82 is located outside the discharge port 9 and fixed between the two push rods 812 of the two connecting rods, and the plug 83 is fixed on the fixing block 82 and used for blocking the discharge port 9. In order to enable the plug 83 to better seal the discharge port 9, specifically, the plug 83 is in a round table shape, one end of the plug 83 with a small diameter is close to the discharge port 9, one end of the plug 83 with a large diameter is close to the fixing block 82, and the plug 83 is a rubber plug and the central shaft of the plug 83 and the central shaft of the discharge port 9 are located on the same horizontal line.
In the technical scheme, after fermentation is completed, the cylinder 71 is started, so that the driven block 74, the supporting rod 811, the push rod 812, the fixed block 82 and the plug 83 move integrally in a direction away from the cylinder 71, at this time, the plug 83 is pulled out of the discharge hole 9, the driven block 74 drives the film layer 4 to move upwards under the driving of the driving block 73, and at this time, the film layer 4 is gradually changed from an upper concave state to a lower concave state, so that tea leaves are discharged outwards through the discharge hole 9 quickly.
Referring to fig. 2-3, preferably, the lower chamber of the fermentation tank 1 is provided with an air inlet 5 and an air outlet 6 for the inlet and outlet of a heat medium, the air inlet 5 and the air outlet 6 are respectively located at two opposite sides of the fermentation tank 1, and the heat medium is hot air so that the fermentation temperature is constant. Preferably, the stirring mechanism includes a motor 31, a stirring shaft 32 and a stirring paddle 33. The motor 31 is arranged at the center of the top of the fermentation tank 1, the stirring shaft 32 is positioned in the upper chamber of the fermentation tank 1, and the upper end of the stirring shaft passes through the top of the fermentation tank 1 and is connected with the output shaft of the motor 31. The stirring paddle 33 is fixed on the stirring shaft 32 and used for stirring the materials in the fermentation tank 1, and the stirring paddle 33 is an inclined blade type blade.
In above-mentioned technical scheme, when motor 31 started, the (mixing) shaft 32 will drive stirring rake 33 and rotate in fermentation cylinder 1 upper chamber to stir the material through stirring rake 33, so that be heated evenly, keep suitable fermentation temperature.
Example 2: the processing method of the selenium-rich dark tea is different from the embodiment 1 in that the processing method comprises the following steps:
s1 picking
Picking fresh leaves with one bud and one leaf or two leaves with one bud and two leaves from wild tea trees as raw materials;
s2, deactivating enzyme
Spreading the picked fresh leaves for 2h to obtain spread leaves with water content of 68%, and deactivating enzyme at 150 deg.C for 6min to obtain deactivated leaves;
s3, twisting
Rolling the enzyme-removed leaves in the step S2 until the tea juice is kneaded out and the tea is formed into strips;
s4, sterilizing
Sterilizing the tea leaves obtained in the step S3 with steam of 100 ℃;
s5, fermentation
Uniformly mixing the tea sterilized in the step S4 with the selenium-enriched yeast Candida utilis according to the mass ratio of 150:1, and fermenting for 3d at 35 ℃ by a fermentation device;
s6, Back-kneading
Repeatedly kneading and tightly winding the tea leaves fermented in the step S5;
s7, charcoal baking
And (5) roasting the tea leaves kneaded in the step (S6) with pine charcoal until the water content is less than 70%, thus obtaining the selenium-rich dark tea.
Example 3: the processing method of the selenium-rich dark tea is different from the embodiment 1 in that the processing method comprises the following steps:
s1 picking
Picking fresh leaves with one bud and one leaf or two leaves with one bud and two leaves from wild tea trees as raw materials;
s2, deactivating enzyme
Spreading the picked fresh leaves for 4h to obtain spread leaves with water content of 72%, and deactivating enzyme at 160 deg.C for 12min to obtain deactivated leaves;
s3, twisting
Rolling the enzyme-removed leaves in the step S2 until the tea juice is kneaded out and the tea is formed into strips;
s4, sterilizing
Sterilizing the tea leaves obtained in the step S3 with steam at 120 ℃;
s5, fermentation
Uniformly mixing the tea sterilized in the step S4 with the selenium-enriched yeast Candida utilis according to the mass ratio of 150:1, and fermenting for 7d at 55 ℃ by a fermentation device;
s6, Back-kneading
Repeatedly kneading and tightly winding the tea leaves fermented in the step S5;
s7, charcoal baking
And (5) roasting the tea leaves kneaded in the step (S6) with pine charcoal until the water content is less than 70%, thus obtaining the selenium-rich dark tea.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that several improvements and modifications without departing from the principle of the present invention will occur to those skilled in the art, and such improvements and modifications should also be construed as within the scope of the present invention.
Claims (10)
1. A processing method of selenium-rich dark tea is characterized by comprising the following steps: the method comprises the following steps:
s1 picking
Picking fresh leaves with one bud and one leaf or two leaves with one bud and two leaves from wild tea trees as raw materials;
s2, deactivating enzyme
Spreading the picked fresh leaves for 2-4h to obtain spread leaves with water content of 68-72%, and deactivating enzyme at 150-160 deg.C for 6-12min to obtain deactivated leaves;
s3, twisting
Rolling the enzyme-removed leaves in the step S2 until the tea juice is kneaded out and the tea is formed into strips;
s4, sterilizing
Sterilizing the tea leaves obtained in the step S3 by steam at the temperature of 100-120 ℃;
s5, fermentation
Uniformly mixing the tea leaves sterilized in the step S4 with selenium-enriched yeast, and fermenting for 3-7d at 35-55 ℃ by a fermentation device;
s6, Back-kneading
Repeatedly kneading and tightly winding the tea leaves fermented in the step S5;
s7, charcoal baking
And (5) roasting the tea leaves kneaded in the step (S6) with pine charcoal until the water content is less than 70%, thus obtaining the selenium-rich dark tea.
2. The processing method of the selenium-rich dark tea as claimed in claim 1, wherein the processing method comprises the following steps: the selenium-rich yeast is one or more of Schizosaccharomyces, Candida utilis and Brevibacterium flavum.
3. The processing method of the selenium-rich dark tea as claimed in claim 1, wherein the processing method comprises the following steps: the fermentation device comprises a fermentation tank (1) and a plugging mechanism, wherein a feeding hole (2) and a discharging hole (9) are formed in the fermentation tank (1);
a membrane layer (4) is arranged in the fermentation tank (1), the membrane layer (4) is fixed in the fermentation tank (1), the fermentation tank (1) is divided into an upper chamber and a lower chamber through the membrane layer (4), wherein a stirring mechanism is arranged in the upper chamber, and a driving mechanism for driving the membrane layer (4) to move up and down and driving the plugging mechanism to plug or open the discharge hole (9) is arranged in the lower chamber;
the feeding hole (2) is positioned at the top of the fermentation tank (1), and the discharging hole (9) is positioned at the side part of the fermentation tank (1) and at the joint of the membrane layer (4) and the fermentation tank (1).
4. The processing method of the selenium-rich dark tea as claimed in claim 3, wherein the processing method comprises the following steps: the driving mechanism comprises a cylinder (71), a supporting block (72), a driving block (73) and a driven block (74);
the driven block (74) is fixed at the bottom of the film layer (4), the driving block (73) is supported at the bottom of the driven block (74), the bottom surface of the driven block (74) is an inclined surface and inclines from bottom to top along the direction close to the cylinder (71), and the top surface of the driving block (73) is an inclined surface and is matched with the driven block (74) so that the driving block (73) is in surface-to-surface contact with the driven block (74);
the supporting block (72) is fixed at the bottom in the fermentation tank (1), and the air cylinder (71) is installed on the supporting block (72) and used for driving the driving block (73) to horizontally slide at the bottom in the fermentation tank (1).
5. The processing method of the selenium-rich dark tea as claimed in claim 4, wherein the processing method comprises the following steps: the plugging mechanism comprises a connecting rod, a fixing block (82) and a plug (83);
the connecting rod includes bracing piece (811) and push rod (812), bracing piece (811) with cylinder (71) are connected respectively the relative both sides of initiative piece (73), bracing piece (811) one end with initiative piece (73) are fixed, and the other end passes fermentation cylinder (1) and with push rod (812) are fixed, fixed block (82) are located discharge gate (9) outside is just fixed on push rod (812), end cap (83) are fixed on fixed block (82) and be used for the jam in discharge gate (9).
6. The processing method of the selenium-rich dark tea as claimed in claim 5, wherein the processing method comprises the following steps: the plug (83) is in a round table shape, one end of the small diameter is close to the discharge hole (9), and one end of the large diameter is close to the fixing block (82).
7. The processing method of the selenium-rich dark tea as claimed in claim 3, wherein the processing method comprises the following steps: the fermentation tank (1) lower cavity is provided with an air inlet (5) and an air outlet (6), and the air inlet (5) and the air outlet (6) are respectively located on two opposite sides of the fermentation tank (1).
8. The processing method of the selenium-rich dark tea as claimed in claim 3, wherein the processing method comprises the following steps: the stirring mechanism comprises a motor (31), a stirring shaft (32) and a stirring paddle (33);
motor (31) are installed fermentation cylinder (1) top center, (mixing) shaft (32) are located fermentation cylinder (1) are gone up indoor and upper end and are passed fermentation cylinder (1) top and with motor (31) output shaft, stirring rake (33) are fixed just be used for the stirring on (mixing) shaft (32) material in the fermentation cylinder (1).
9. The processing method of the selenium-rich dark tea as claimed in claim 8, wherein the processing method comprises the following steps: the stirring paddle (33) is an inclined blade type paddle.
10. The processing method of the selenium-rich dark tea as claimed in claim 3, wherein the processing method comprises the following steps: the film layer (4) is a silica gel film.
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| CN108450584A (en) * | 2018-04-20 | 2018-08-28 | 贵州省凤冈县浪竹有机茶业有限公司 | The two-way twisting device of tealeaves |
| CN112544741A (en) * | 2020-12-04 | 2021-03-26 | 王亭梦 | Food fermentation process |
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2021
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| CN102358883A (en) * | 2011-10-31 | 2012-02-22 | 江苏海华生物科技有限公司 | Rotary shaft type solid state fermentation tank |
| CN102669317A (en) * | 2012-06-13 | 2012-09-19 | 林清矫 | Full-automatic oolong tea production equipment |
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| CN112544741A (en) * | 2020-12-04 | 2021-03-26 | 王亭梦 | Food fermentation process |
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Application publication date: 20211019 |