CN109055247A - The method of one saccharomycete strain and its ripe general tea of processing - Google Patents

The method of one saccharomycete strain and its ripe general tea of processing Download PDF

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CN109055247A
CN109055247A CN201810910309.2A CN201810910309A CN109055247A CN 109055247 A CN109055247 A CN 109055247A CN 201810910309 A CN201810910309 A CN 201810910309A CN 109055247 A CN109055247 A CN 109055247A
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tea
fermentation
tealeaves
bacterial strain
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魏珍珍
邹广田
郝彬秀
盛玉泊
田海霞
官云平
李颂
孙婷婷
周方勇
顾红惠
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China Tea Yunan Co ltd
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Abstract

The invention belongs to Pu'er tea production technologies and product quality to improve field, and in particular to the method for a saccharomycete strain and its ripe general tea of processing.Blastobotrys adeninivorans yeast of the present invention, has been preserved in China Committee for Culture Collection of Microorganisms's common micro-organisms center, and deposit number is CGMCC No.15960.Blastobotrys adeninivorans bacterial strain of the present invention is applied to carry out forced fermentation in Pu'er tea processing technology, and Pu'er tea can be made to have special mellow and rouge fragrant, inhibits harmful mould, while greatly shortening fermentation time.

Description

The method of one saccharomycete strain and its ripe general tea of processing
Technical field
The invention belongs to Pu'er tea production technologies and product quality to improve field, be related to one plant of yeast Blastobotrys The method of adeninivorans bacterial strain 0071-BA and its ripe general tea of processing.
Background technique
Pu'er cooked tea belongs to post-fermented tea, is to be made using solar dried green tea as raw material by one month or more pile-fermentation, Generally believe that Pu'er tea has effects that reducing blood lipid, promotees digestion effect.The most important feature of Pu'er tea is with storage time Extend, the features such as mouthfeel fragrance of tealeaves can change, and the mouthfeel become better and better is presented.With Pu'er tea storage time Extend, the value and price of Pu'er tea can all dramatically increase.
Saccharomyces is more in distributed in nature, has numerous applications, research hair in field of food such as brewing fermentation, flour fermentations Protein, amino acid and a variety of metabolic enzymes are rich in existing yeast thallus.Under the extracellular enzyme effect of saccharomycete, tealeaves can occur The reactions such as some tea polyphenols oxidations, amino acid polymerization.
Blastobotrys adeninivorans is also reported as Arxula adeninivorans, is Ascomycota ferment The fungi of female Cordycepps at home and abroad has been reported that discovery, and the country mostly exists in Pu'er tea, but seldom to its correlative study.
Summary of the invention
For this purpose, the angle that the present invention is excavated and developed and used from microbial resources, isolated Blastobotrys Adeninivorans bacterial strain provides the method for being applied in Pu'er tea processing technology and carrying out forced fermentation, makes Pu'er tea It is fragrant with special mellow and rouge, inhibit harmful mould, while greatly shortening fermentation time.
It is micro- to be preserved in China by a kind of Blastobotrys adeninivorans bacterial strain 0071-BA of the present invention Biological inoculum preservation administration committee common micro-organisms center, deposit number are CGMCC No.15960.
Above-mentioned microbial strains, by isolating and purifying to obtain in tea Pu'er tea storage silo in Kunming, inheritance stability meets general The bacterial strain of the production requirements such as Pu'er tea tea high temperature steaming, includes the following steps:
1, tea Pu'er tea storage warehouse chooses several places in Kunming, using air bells laid method and surface smear sampling method into Row sampling;
2, it is cultivated after sampling in PDA solid medium, is cultivated 10 days under the conditions of 28-30 DEG C and carry out inversion culture, Blank control group culture is carried out simultaneously, records bacterium colony growing state;
3, bacterium colony growing state is recorded, bacterium colony identification is carried out;The bacterium colony that colonial morphology is mutually distinguishable is chosen to carry out in next step Purifying;
4, in picking screening bacterium colony streak inoculation to PDA solid medium, 5-10 days are cultivated under the conditions of 28-30 DEG C, directly To obtaining the single colonie of each bacterial strain;
5, the bacterial strain of acquisition is subjected to bacterial strain identification, selecting can grow at 20-45 DEG C, survive, can apply at 20-75 DEG C It is produced in Pu'er tea, inhibits miscellaneous bacteria ability strong, and the bacterial strain of inheritance stability, deposit number is CGMCC No.15960.
The forced fermentation of Pu'er tea technique, institute are carried out using the Blastobotrys adeninivorans bacterial strain of this patent The forced fermentation stated is accessed before pile-fermentation containing the single culture that the deposit number is CGMCC No. 15960 through training The liquid seeds obtained after supporting;The liquid seeds are prepared via a method which:
1, take Blastobotrys adeninivorans (CGMCC No.15960) strain inoculated after activating to liquid Culture medium.The fluid nutrient medium is included PDB fluid nutrient medium and is prepared the Liquid Culture of tea juice using tealeaves, tea powder Base.
2, it will aseptically be cultivated in shaking table under the conditions of 28-30 DEG C.The density of the liquid seeds is 106Cfu/mL or more.
The standardization for preparing forced fermentation technique using the Blastobotrys adeninivorans bacterial strain of this patent is general Pu'er tea tea product, which is characterized in that Pu'er tea can be made to have special mellow and rouge fragrant, inhibit harmful mould, while greatly Shorten fermentation time.Described standardization Pu'er technique includes assorted gross tea, mixing, sprinkling inoculation, pile-fermentation, turning, trench digging It is dry, it carries out as follows:
1, after different material to be carried out to assorted, mixing as required, it is desirable that tealeaves is miscellaneous without spending after mixing;
2, the liquid seeds of preparation are inoculated into tea raw material, are uniformly sprayed using miniaturised nebuliser and uniformly sprays bacterium solution It is spread across on tealeaves, inoculum concentration 25-35%, bacterium solution sprinkling is uniform, tealeaves does not agglomerate;
3, the tealeaves after inoculation is stacked into high 1 meter, the tea heap that length and width are (2-3) * (2-3) rice, carries out pile-fermentation, heap Core temperature is 30-35 degree in 40-50 degree or so, heap surface temperature, and moisture content is in 40%-50% or so;
4, primary every turning in 7 days, allow reactor core tealeaves to be uniformly mixed with to heap table tealeaves, and keep core temperature and water Divide content;
5, it after post-fermentation 14-21 days of turning 2-3 times, ditches in raft, is aerated drying.
Bacterial strain of the present invention is applied in Pu'er tea production and processing, plays very big positive work to the quality conversion of Pu'er tea With by keeping Pu'er tea fragrant with special mellow and rouge, inhibiting harmful mould, flavour is mellow to tealeaves progress forced fermentation It returns sweet, while greatly shortening fermentation time.
Specific embodiment
The following PDA solid mediums as described in the examples of the present invention, PDB fluid nutrient medium are according in the prior art often The preparation of rule method.
The selection of Blastobotrys adeninivorans bacterial strain (CGMCC No.15960) in the present invention, including Following steps:
1, tea Pu'er tea storage warehouse chooses several places in Kunming, using air bells laid method and surface smear sampling method into Row sampling;
2, it by the PDA solid medium after sampling, is cultivated under the conditions of 28-30 DEG C and carries out within 10 days inversion culture, while into Line blank control group culture records bacterium colony growing state;
3, bacterium colony growing state is recorded, bacterium colony identification is carried out;Choose representative colonies, the bacterium colony that colonial morphology is mutually distinguishable Carry out next step purifying;
4,5-10 days are cultivated in the above-mentioned bacterium colony streak inoculation to PDA solid medium of picking, under the conditions of 28-30 DEG C, directly To the single colonie of each bacterial strain is obtained, (50 plants total) is numbered in all bacterial strains of acquisition;
5, the bacterial strain of acquisition is subjected to bacterial strain identification, and carries out heat resistance experiment and genetic stability experiment, screening can It grows used in 20-45 DEG C, survives at 20-75 DEG C, be applied to Pu'er tea and produce, inhibit miscellaneous bacteria ability strong, and the bacterium of inheritance stability Strain, deposit number are CGMCC No.15960.
By by bacterial strain 0071-BA isolated in above-mentioned steps, bacterial strain identification, result Blastobotrys are carried out adeninivorans.The bacterial strain genetic stability is stablized, and has good heat resistance, can meet production requirement, sample presentation number For 0071-BA, bacterial strain is in China Committee for Culture Collection of Microorganisms's common micro-organisms center, deposit number CGMCC No.15960, Blastobotrys adeninivorans, preservation address are in Yard 1, BeiChen xi Road, Chaoyang District, Beijing City 3 Institute of microbiology of the academy of sciences of state, the deposit date is on June 19th, 2018, current state was survival.
Blastobotrys adeninivorans strain inoculated of the present invention is cultivated at 28-32 DEG C in PDA culture medium Start to grow after 18-24 hours, bacterium colony is round, and micro- protuberance, milky, neat in edge, surface is smooth sticky and opaque, micro- Visible colonies cell is ellipse, the typical feature with yeast strain under mirror.The strain growth speed is fast, and growth rate is 1.95mm-2.23mm/d (colony diameter/day) is able to suppress using amino acid as nitrogen source with other microorganism competitive growths The growth of the microorganisms such as aspergillus flavus, Mucor can also promote tea polyphenols, thearubigin, flavones to reduce under the action of yeast ectoenzyme, Increase theabrownin, caffeine content.
The bacterial strain is used for Pu-erh tea fermentation production, increase prepares liquid seeds and inoculation step, forms forced fermentation work Skill, including gross tea is assorted, mixing, prepares liquid seeds, sprinkling inoculation, pile-fermentation, turning, trench digging drying, compression moulding.It should Process characteristic be inoculation before it is unsterilised, do not influence the natural flavour feature of Pu'er gross tea, after inoculation can in tealeaves fast fast-growing It is long, and the material compositions such as amino acid, flavones in rapid conversion tealeaves, increase theabrownin, and make have unique mellowness in Pu'er tea, Slightly butterfat is fragrant.
Wherein the liquid seeds are pressed using Blastobotrys adeninivorans (CGMCC No. 15960) It is prepared according to following method:
1, take Blastobotrys adeninivorans (CGMCC No.15960) strain inoculated after activating to liquid Culture medium.The fluid nutrient medium is included PDB fluid nutrient medium and is prepared the Liquid Culture of tea juice using tealeaves, tea powder Base.
2, above-mentioned culture solution is aseptically placed in shaking table and is cultivated in 28-30 DEG C.The density of the liquid seeds It is 106Cfu/mL or more.
The standardization forced fermentation technique carries out as follows:
1, after different material to be carried out to assorted, mixing as required, it is desirable that tealeaves is miscellaneous without spending after mixing;
2, tea raw material is placed on clean production line, the liquid seeds of preparation is inoculated into tealeaves, use is small-sized Sprayer, which uniformly sprays, is uniformly sprayed onto bacterium solution on tealeaves, while keeping stirring, stirring, and the inoculum concentration of liquid seeds is 25- 35%, it is desirable that bacterium solution sprinkling is uniform, tealeaves does not agglomerate;
3, the tealeaves after inoculation is stacked at high 1 meter, the tea heap that length and width are (2-3) * (2-3) rice, in the clean of temperature and humidity control Net environment ferments, and temperature is 27-33 DEG C, under the conditions of relative air humidity is 70-80%, carries out pile-fermentation, it is desirable that hair Core temperature is 30-35 degree in 40-50 degree, heap surface temperature during ferment, and moisture content is in 40%-50% or so;
4, primary every turning in 7 days, it allows reactor core tealeaves to be uniformly mixed with to heap table tealeaves, reduces agglomeration, and keep reactor core Temperature is in 40-50 degree, moisture content 40%-50%;
5, it after post-fermentation 14-21 days of turning 2-3 times, ditches on tea heap, aeration-drying 5-10 days, until moisture reaches Terminate to produce when to 12-15%.
1 forced fermentation Pu'er tea of embodiment
The method according to the invention prepares Pu'er cooked tea using single strain standardization forced fermentation technique.As follows It carries out:
1, after the big-leaf species in yunnan solar dried green tea raw material of 3 kinds of different producing areas being carried out assorted, mixing as required, it is desirable that mixing Tealeaves is miscellaneous without spending afterwards;
2, take Blastobotrys adeninivorans (CGMCC No.15960) strain inoculated after activating to PDB liquid Body culture medium.
3, Liquid Culture is based on 28 DEG C, is aseptically placed in shaking table and cultivates.The density of the liquid seeds is 5*106cfu/mL。
4, the tea raw material after will be assorted is placed on clean production line, and the liquid seeds of preparation are inoculated into tealeaves, It is uniformly sprayed using miniaturised nebuliser and is uniformly sprayed onto bacterium solution on tealeaves, while kept stirring, stirring, the inoculation of liquid seeds Amount is 35%, it is desirable that bacterium solution sprinkling is uniform, tealeaves does not agglomerate;
5, stacking the tealeaves after inoculation at high 1 meter, length and width is 2*3 meters of tea heap, in temperature and humidity control clean environment into Row fermentation, temperature are 33 DEG C, under the conditions of relative air humidity is 80%, carry out pile-fermentation, it is desirable that reactor core temperature in fermentation process Degree is at 45 degree, and heap surface temperature is 32 degree, and moisture content is 40% or so;
6, primary every turning in 7 days, it allows reactor core tealeaves to be uniformly mixed with to heap table tealeaves, reduces agglomeration, and keep reactor core Temperature is at 45 degree, moisture content 40%;
7, it after the post-fermentation 21 days of turning 3 times, ditches on tea heap, aeration-drying 8 days, until knot when moisture reaches 12% Beam production.
Pu'er cooked tea manufactured in the present embodiment, stay in grade, flavour is mellow, strongly fragrant, tea polyphenols rapid conversion, tea Brown cellulose content, which replies, to be increased.Its fragrance has special mellow, and bottom note slightly has butterfat fragrant.Five batches of continuous preparation, are fermented into Power improves, and mildew rate reduces, and miscellaneous bacteria reduces the interference of fermentation.Production cycle shortens 31 days compared with comparative example.
2 forced fermentation Pu'er tea of embodiment
The method according to the invention prepares Pu'er cooked tea using single strain standardization forced fermentation technique.As follows It carries out:
1, after the big-leaf species in yunnan solar dried green tea raw material of 2 kinds of different producing areas being carried out assorted, mixing as required, it is desirable that mixing Tealeaves is miscellaneous without spending afterwards;
2, take Blastobotrys adeninivorans (CGMCC No.15960) strain inoculated after activating to PDB liquid Body culture medium.
3, Liquid Culture is based on 28 DEG C, is aseptically placed in shaking table and cultivates.The density of the liquid seeds is 1*106cfu/mL。
4, the tea raw material after will be assorted is placed on clean production line, and the liquid seeds of preparation are inoculated into tealeaves, It is uniformly sprayed using miniaturised nebuliser and is uniformly sprayed onto bacterium solution on tealeaves, while kept stirring, stirring, the inoculation of liquid seeds Amount is 27%, it is desirable that bacterium solution sprinkling is uniform, tealeaves does not agglomerate;
5, stacking the tealeaves after inoculation at high 1 meter, length and width is 2*2 meters of tea heap, in temperature and humidity control clean environment into Row fermentation, temperature are 27 DEG C, under the conditions of relative air humidity is 70%, carry out pile-fermentation, it is desirable that reactor core temperature in fermentation process Degree is at 40 degree, and heap surface temperature is 30 degree, and moisture content is 40% or so;
6, primary every turning in 7 days, it allows reactor core tealeaves to be uniformly mixed with to heap table tealeaves, reduces agglomeration, and keep reactor core Temperature is at 40 degree, moisture content 40%;
7, it after the post-fermentation 14 days of turning 2 times, ditches on tea heap, aeration-drying 5 days, until knot when moisture reaches 15% Beam production.
Pu'er cooked tea manufactured in the present embodiment, stay in grade, flavour is mellow, tea polyphenols rapid conversion, dark brown cellulose content Increase.Its fragrance has special mellow, and bottom note slightly has butterfat fragrant.Five batches of continuous preparation, fermentation success rate improve, mildew Rate reduces, and miscellaneous bacteria reduces the interference of fermentation.Production cycle shortens 41 days compared with comparative example.
1 Pu'er tea of comparative example is routinely prepared
According to the requirement of " geography symbol product-Pu'er tea " (GB/T 22111), tea raw material is prepared as Pu'er cooked tea, The pile-fermentation time is 35 days, and the complete production cycle is 60 days.
The Pu'er cooked tea ingredient and quality of above-described embodiment are detected and evaluated.Each embodiment takes three parts of samples, Testing result average value is recorded in the following table 1 respectively.
The testing result of 1 Pu'er cooked tea quality of table
By the Pu'er cooked tea data of table 1 it is found that the theabrownin of Examples 1 and 2, caffeine content are higher than comparative example, and tea Leaf distinctive aroma has the rare mellowness of traditional handicraft, has significant difference with conventional Pu'er tea, and can effectively inhibit other The growth of miscellaneous bacteria, improve pile-fermentation success rate, while substantially shorten fermentation time more than half.In general, it utilizes The Examples 1 and 2 of Blastobotrys adeninivorans preparation are integrally better than comparative example.
In addition, evaluation soup look is dark red, and shade is different between different batches after comparative example repeats five times, quality is unstable It is fixed, can not standardized production, and have heap taste, it is necessary to be aged by the prolonged later period, really can be prepared as product by cake of press. And by the method for this patent, the soup look difference being visible by naked eyes between five batches of Examples 1 and 2, in identical technique Under parameter, flavour, fragrance are stablized.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or It changes still within the protection scope of the invention.

Claims (4)

1. a primary yeast Blastobotrys adeninivorans 0071-BA, has been preserved in Chinese microorganism strain preservation pipe Reason committee common micro-organisms center, deposit number are CGMCC No.15960.
2. microbial strains according to claim 1, which is characterized in that pure by being separated in tea Pu'er tea storage silo in Kunming Change obtains, inheritance stability, meets the bacterial strain of the production requirements such as Pu'er tea high temperature steaming, includes the following steps:
S11, tea Pu'er tea storage warehouse chooses several places in Kunming, smears sampling method using air bells laid method and surface and carries out Sampling;
It is cultivated after S12, sampling in PDA solid medium, is cultivated 10 days under the conditions of 28-30 DEG C and carry out inversion culture, together Shi Jinhang blank control group culture records bacterium colony growing state;
S13, record bacterium colony growing state, carry out bacterium colony identification;It is pure in next step to choose the bacterium colony progress that colonial morphology is mutually distinguishable Change;
S14, picking S13 are screened in bacterium colony streak inoculation to PDA solid medium, cultivate 5-10 days under the conditions of 28-30 DEG C, directly To obtaining the single colonie of each bacterial strain;
S15, the bacterial strain for obtaining S14 carry out bacterial strain identification, and selecting can grow at 20-45 DEG C, survive, can answer at 20-75 DEG C It is produced for Pu'er tea, inhibits miscellaneous bacteria ability strong, and the bacterial strain of inheritance stability, deposit number is CGMCC No.15960.
3. carrying out the strong of Pu'er tea technique using Blastobotrys adeninivorans bacterial strain described in as claimed in claim 1 or 22 Change fermentation, which is characterized in that it is CGMCC that the forced fermentation, which is that access contains the deposit number before pile-fermentation, The liquid seeds that the single culture of No.15960 obtains after cultivation;The liquid seeds are prepared via a method which:
S21, Blastobotrys adeninivorans (CGMCC No.15960) strain inoculated to the liquid after activation is taken to train Support base.The fluid nutrient medium is included PDB fluid nutrient medium and is prepared the fluid nutrient medium of tea juice using tealeaves, tea powder;
S22, it will aseptically be cultivated in shaking table under the conditions of 28-30 DEG C.The density of the liquid seeds is 106Cfu/mL or more.
4. preparing forced fermentation technique using Blastobotrys adeninivorans bacterial strain described in as claimed in claim 1 or 22 Standardize Pu'er tea product, which is characterized in that utilize Blastobotrys adeninivorans (CGMCC No.15960) bacterium Strain inoculation preparation Pu'er tea product, described standardization Pu'er technique include assorted gross tea, mixing, sprinkling inoculation, pile-fermentation, turn over Heap, trench digging drying, carry out as follows:
S31, different material is carried out as required it is assorted, mix after, it is desirable that tealeaves is miscellaneous without spending after mixing;
S32, the liquid seeds for preparing claim 3 are inoculated into tea raw material, are uniformly sprayed bacterium solution using miniaturised nebuliser It is spread across on tealeaves, inoculum concentration 25-35%, bacterium solution sprinkling is uniform, tealeaves does not agglomerate;
S33, the tealeaves after inoculation is stacked into high 1 meter, the tea heap that length and width are (2-3) * (2-3) rice, carries out pile-fermentation, reactor core Temperature is 30-35 degree in 40-50 degree or so, heap surface temperature, and moisture content is in 40%-50% or so;
It is S34, primary every turning in 7 days, allow reactor core tealeaves to be uniformly mixed with to heap table tealeaves, and keep core temperature and moisture Content;
After S35, post-fermentation 14-21 days of turning 2-3 times, ditches on tea heap, be aerated drying.
CN201810910309.2A 2018-07-13 2018-08-10 The method of one saccharomycete strain and its ripe general tea of processing Pending CN109055247A (en)

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