CN105360294A - Donkey milk having long shelf life and low-temperature production method thereof - Google Patents
Donkey milk having long shelf life and low-temperature production method thereof Download PDFInfo
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- CN105360294A CN105360294A CN201510818728.XA CN201510818728A CN105360294A CN 105360294 A CN105360294 A CN 105360294A CN 201510818728 A CN201510818728 A CN 201510818728A CN 105360294 A CN105360294 A CN 105360294A
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- donkey milk
- milk
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- sterilization
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C3/00—Preservation of milk or milk preparations
- A23C3/02—Preservation of milk or milk preparations by heating
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C3/00—Preservation of milk or milk preparations
Abstract
The invention discloses donkey milk having long shelf life and a low-temperature production method thereof. The method comprises the following steps: 1) placing the donkey milk in a high pressure micro jet flow homogenizer for performing dynamic high pressure micro jet flow processing; 2) sealing the donkey milk processed in the step 1) in a container; and 3) placing the donkey milk processed in the step 2) in an autoclave of high static pressure equipment, and completely immersing the donkey milk in a pressure transmitting medium for high static pressure sterilization processing. According to the invention, micro combination of dynamic high pressure micro jet flow and high static pressure can realize production of the donkey milk having the prolonged shelf life, compared with a traditional pasteurization method, the donkey milk has the advantages of low processing temperature, less energy consumption, long shelf life and high nutrition value.
Description
Technical field
The present invention relates to a kind of donkey milk and temperature production method thereof of long shelf life, belong to liquid milk and production technical field thereof.
Background technology
The modal poultry of Lv Shi China one of is planted, and has the diversified economy purposes such as meat, skin, medicine, breast, labour dual-purpose.Donkey milk, as one of the principal by product of donkey aquaculture, not only has higher nutritive value, and has medical value more widely, just on the books in Compendium of Material Medica: " donkey breast; smell is sweet, cold profit, nontoxic; heat frequently drink can control the obstruction of the circulation of vital energy, separate children's's heat poison, do not give birth to acne rash ".Modern study shows in donkey milk containing the abundant immune factor such as immunoglobulin (Ig), lactoferrin, lysozyme, have strengthen immune function of human body, antitumor, the function such as delay senility, in addition, donkey breast average fat content is only 1.1g/100g, cholesterol level is 2.2mg/100g, far below the content in milk, be typical low fat, low cholesterol food, be applicable to cardiovascular and cerebrovascular diseases and obesity etc. drunk by people.On the whole, the basic chemical composition of donkey breast, protein and Fatty acid compositions etc. all with human milk relatively, can as effective substitute of breast milk.
At present, the liquid milk that China market exists is main based on high temperature and ultra high temperature short time sterilization milk, these products are in order to obtain enough shelf lifes, all can through high-temperature process in process, heating can cause liquid milk that a series of disadvantageous change occurs, the change of such as color, the change of emulsion stability, heat sensitive reactive protein, function factor sex change etc., thus make product within the shelf-life, produce precipitation, function factor loss of bioactivity, dairy products nutritive value reduction etc.Pasteurize milk sterilization at slightly low temperature, but there is the shortcomings such as shelf-life short (usual 5-7 days).
Summary of the invention
The object of this invention is to provide a kind of donkey milk and temperature production method thereof of long shelf life, the method can complete operation process such as donkey homogenising milk, pre-sterilizing, sterilizations at normal temperatures in conjunction with dynamic super-voltage and static ultrahigh pressure (high static pressure), under the prerequisite of shelf-life extending donkey milk, also effectively retain function factor in donkey milk, avoid the destruction of high temperature sterilization to function factor in donkey milk, improve the quality of donkey dairy products, have broad application prospects.
The invention provides the production method of a breeding ass milk, it comprises the steps:
(1) donkey milk is placed in high pressure microjet homogenizer and carries out the process of dynamic high-pressure microjet;
(2) the donkey milk processed through step (1) is sealed in container;
(3) the donkey milk processed through step (2) is placed in the autoclave of high static pressure equipment, and donkey milk is all immersed in transmission medium carry out high static pressure sterilization processing.
In above-mentioned method, in step (1), in the process of described dynamic high-pressure microjet:
Processing pressure can be 150 ~ 300MPa, specifically can be 150 ~ 250MPa, 250 ~ 300MPa, 150MPa, 250MPa or 300MPa;
Treatment temperature can 20 ~ 25 DEG C, specifically can be 20 DEG C;
Number of processes can be 2 ~ 3 times, specifically can be 2 times.
In above-mentioned method, in step (2), described in be sealed in container step specifically can be described donkey milk carried out filling; Described filling before sterilization is carried out to container; Described container can be made up of food grade elastomeric material, and described food grade elastomeric material includes but not limited to: PETG (PET), high density polyethylene (HDPE) (HDPE), polyvinyl chloride (PVC), polypropylene (PP) or ethylene-vinyl alcohol copolymer (EVOH) etc.
In above-mentioned method, in step (3), described transmission medium can be water;
In described high static pressure sterilization processing:
Sterilization temperature can be 15 ~ 25 DEG C, specifically can be 15 ~ 20 DEG C, 20 ~ 25 DEG C, 15 DEG C, 20 DEG C or 25 DEG C;
Sterilization pressure can be 350 ~ 550MPa, specifically can be 350 ~ 450MP, 450 ~ 550MP, 350MP, 450MP or 550MP;
Dwell time can be 5 ~ 30min, specifically can be 5 ~ 15min, 15 ~ 30min, 5min, 15min or 30min.
In above-mentioned method, described method is front in step (1), also comprises the step of fresh donkey milk material being carried out clean breast through milk clarifier.
In above-mentioned method, described method is front in step (1), also comprises the donkey milk through clean breast is carried out standardized step (preparing skim milk or flavoured milk) after described clean breast.
In above-mentioned method, described method, after step (3), also comprises the step of the donkey milk preservation at 0 ~ 5 DEG C after step (3) process, specifically can be 4 DEG C.
The donkey milk obtained by above-mentioned production method, also in protection scope of the present invention, the shelf life of this donkey milk is long.
Above-mentioned donkey milk can be pure donkey milk, degreasing donkey milk or local flavor donkey milk, when described donkey milk be degreasing donkey milk or local flavor donkey milk time, described donkey milk also comprise after described clean breast by described donkey milk according to produce donkey dairy products kind standardization is carried out to donkey milk, to reach the step of the target indicator of product.
The present invention has following beneficial effect:
(1) utilize in the inventive method that dynamic high-pressure microjet is micro-achieves donkey homogenising milk and pre-sterilizing at normal temperatures.
(2) utilize high static pressure to carry out further sterilization to donkey milk in the inventive method, thus under normal temperature condition, namely reach the object of microorganism in sterilization donkey milk.
(3) the micro-production achieving Shelf-life donkey milk in conjunction with height static pressure of the present invention's application dynamic high-pressure microjet, compared with traditional pasteurize, has the features such as treatment temperature is low, energy consumption is little, long shelf-life, nutritive value are high.
Accompanying drawing explanation
Fig. 1 is donkey milk producing technology flow chart of the present invention.
Detailed description of the invention
Following concrete enforcement can make those skilled in the art more fully understand technological means of the present invention and step, but the scope do not limited the present invention in any way.
The experimental technique used in following embodiment if no special instructions, is conventional method.
Material used in following embodiment, reagent etc., if no special instructions, all can obtain from commercial channels.
Donkey milk obtained in following embodiment is pure donkey milk, when preparing degreasing donkey milk or local flavor donkey milk, in the following embodiments between step (1) and step (2), add following steps: donkey milk step (1) obtained, donkey dairy products kind according to producing carries out standardization to donkey milk, to reach the target indicator of product.
High pressure microjet homogenizer is purchased from promise pool fluid science and technology (Shanghai) Co., Ltd., and model is DeBEE2000 Microfluidizer.
High static pressure equipment sends out high pressure science and technology limited Company purchased from packet header section, and model is HPP600MPa/30L.
Embodiment 1, dynamic high-pressure microjet are micro-in conjunction with height static pressure temperature production donkey milk
Produce donkey milk according to process chart as shown in Figure 1, concrete steps are as follows:
(1) by refrigeration fresh donkey milk material through milk clarifier pretreatment, removing raw material in mechanical admixture, dust, cell fragment etc.
(2) the donkey milk that step (1) processes is placed in high pressure microjet homogenizer and carries out the micro-process of dynamic high-pressure microjet, lipochondrion and pre-sterilized object in donkey milk is reduced to reach, processing pressure: 150MPa, treatment temperature 20 DEG C, number of processes 2 times.
(3) undertaken filling by the donkey milk of step (2) gained and seal, container used is through pre-sterilizing Packaging Bottle, and container material is food level PET packaging material.
(4) donkey milk that is filling for step (3) and sealing is put into the autoclave of high static pressure equipment, and make it all to be immersed in transmission medium (water), carry out high static pressure sterilization processing and namely obtain final products, sterilization temperature: 15 DEG C, sterilization pressure: 350MPa, the dwell time: 30min.
(5) the donkey dairy products clean surface labeling through step (4) sterilization is preserved, and preservation condition is 4 DEG C of refrigerations.
Embodiment 2, dynamic high-pressure microjet are micro-in conjunction with height static pressure temperature production donkey milk
Produce donkey milk according to process chart as shown in Figure 1, concrete steps are as follows:
(1) by refrigeration fresh donkey milk material through milk clarifier pretreatment, removing raw material in mechanical admixture, dust, cell fragment etc.
(2) the donkey milk processed through step (1) is placed in high pressure microjet homogenizer and carries out the micro-process of dynamic high-pressure microjet, lipochondrion and pre-sterilized object in donkey milk is reduced to reach, processing pressure: 250MPa, treatment temperature 20 DEG C, number of processes 2 times.
(3) undertaken filling by the donkey milk of step (2) gained and seal, container used is through pre-sterilizing Packaging Bottle, and container material is food-grade PVC packaging material.
(4) donkey milk that is filling for step (3) and sealing is put into the autoclave of high static pressure equipment, and make it all to be immersed in transmission medium water, carry out high static pressure sterilization processing and namely obtain final products, sterilization temperature: 25 DEG C, sterilization pressure: 450MPa, the dwell time: 15min.
(5) the donkey dairy products clean surface labeling through step (4) sterilization is preserved, and preservation condition is 4 DEG C of refrigerations.
Embodiment 3, dynamic high-pressure microjet are micro-in conjunction with height static pressure temperature production donkey milk
Produce donkey milk according to process chart as shown in Figure 1, concrete steps are as follows:
(1) by refrigeration fresh donkey milk material through milk clarifier pretreatment, removing raw material in mechanical admixture, dust, cell fragment etc.
(2) the donkey milk processed through step (1) is placed in high pressure microjet homogenizer and carries out the micro-process of dynamic high-pressure microjet, lipochondrion and pre-sterilized object in donkey milk is reduced to reach, processing pressure: 300MPa, treatment temperature 20 DEG C, number of processes 2 times.
(3) undertaken filling by the donkey milk of step (2) gained and seal, container used is through pre-sterilizing Packaging Bottle, and container material is food-grade EVOH packaging material.
(4) donkey milk that is filling for step (3) and sealing is put into the autoclave of high static pressure equipment, and make it all to be immersed in transmission medium (water), carry out high static pressure sterilization processing and namely obtain final products, sterilization temperature: 20 DEG C, sterilization pressure: 550MPa, the dwell time: 5min.
(5) the donkey dairy products clean surface labeling through step (4) sterilization is preserved, and preservation condition is 4 DEG C of refrigerations.
Comparative example 1, dynamic high-pressure microjet micro-temperature production donkey milk
Produce donkey milk in accordance with the following steps:
(1) by refrigeration fresh donkey milk material through milk clarifier pretreatment, removing raw material in mechanical admixture, dust, cell fragment etc.
(2) the donkey milk processed through step (1) is placed in high pressure microjet homogenizer and carries out the micro-process of dynamic high-pressure microjet, lipochondrion and pre-sterilized object in donkey milk is reduced to reach, processing pressure: 300MPa, treatment temperature 20 DEG C, number of processes 2 times.
(3) the donkey dairy products clean surface labeling through step (2) process (homogeneous and pre-sterilizing) is preserved, and preservation condition is 4 DEG C of refrigerations.
Comparative example 2, high static pressure temperature production donkey milk
Produce donkey milk in accordance with the following steps:
(1) by refrigeration fresh donkey milk material through milk clarifier pretreatment, removing raw material in mechanical admixture, dust, cell fragment etc.
(2) undertaken filling by the donkey milk processed through step (1) and seal, container used is through pre-sterilizing Packaging Bottle, and container material is food-grade EVOH packaging material.
(3) donkey milk that is filling for step (2) and sealing is put into the autoclave of high static pressure equipment, and make it all to be immersed in transmission medium (water), carry out high static pressure sterilization processing and namely obtain final products, sterilization temperature: 20 DEG C, sterilization pressure: 550MPa, the dwell time: 5min.
(4) the donkey dairy products clean surface labeling through step (3) sterilization is preserved, and preservation condition is 4 DEG C of refrigerations.
Embodiment 4, the sense organ of donkey milk obtained in above-described embodiment 1-3 and comparative example and content of microorganisms to be tested
The assay method of organoleptic quality, total plate count and coil determination method all measures with reference to quoting method in GB19645-2010.
The measurement result of table 1,4 DEG C of refrigerated storage, 30 days donkey milk qualities
As can be seen from Table 1, after dynamic super-voltage carries out the operation process such as homogeneous, pre-sterilizing, sterilization in conjunction with static ultrahigh pressure (high static pressure) at normal temperatures to donkey milk, the microorganisms such as the bacterium in donkey milk, mould are all killed, all there is not obvious change in donkey milk sense organ, nutrition, there is no the boiling taste of thermal sterilization milk, still can meet sense organ and the requirement of microorganism limitation in pasteurize milk national standard (GB19645-2010) after 30 days through 4 DEG C of refrigerations.
Above-indicatedly be; embodiment is more representational example just; obvious technical scheme of the present invention is not limited to above-described embodiment, those of ordinary skill in the art, with to mention disclosed in inventing or it is associated, the scope that this patent is protected all should be thought.
Claims (9)
1. the production method of a breeding ass milk, comprises the steps:
(1) donkey milk is placed in high pressure microjet homogenizer and carries out the process of dynamic high-pressure microjet;
(2) the donkey milk processed through step (1) is sealed in container;
(3) the donkey milk processed through step (2) is placed in the autoclave of high static pressure equipment, and donkey milk is all immersed in transmission medium carry out high static pressure sterilization processing.
2. method according to claim 1, is characterized in that: in the process of described dynamic high-pressure microjet, and processing pressure is 150 ~ 300MPa, treatment temperature 20 ~ 25 DEG C, and number of processes is 2 ~ 3 times.
3. method according to claim 1 and 2, is characterized in that: described container is made up of food grade elastomeric material.
4. method according to claim 3, is characterized in that: described food grade elastomeric material is PETG, high density polyethylene (HDPE), polyvinyl chloride, polypropylene or ethylene-vinyl alcohol copolymer.
5. the method according to any one of claim 1-4, is characterized in that: described transmission medium is water; In described high static pressure sterilization processing, sterilization temperature is 15 ~ 25 DEG C, and sterilization pressure is 350 ~ 550MPa, and the dwell time is 5 ~ 30min.
6. the method according to any one of claim 1-5, is characterized in that: described method is front in step (1), also comprises the step of fresh donkey milk material being carried out clean breast through milk clarifier.
7. method according to claim 6, is characterized in that: described method is front in step (1), also comprises the donkey milk through clean breast is carried out standardized step after described clean breast.
8. the method according to any one of claim 1-7 produces the donkey milk obtained.
9. donkey milk according to claim 8, is characterized in that: described donkey milk is pure donkey milk, degreasing donkey milk or local flavor donkey milk.
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Cited By (7)
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CN106798007A (en) * | 2016-12-30 | 2017-06-06 | 新疆玉昆仑天然食品工程有限公司 | A kind of three-sectional low temperature ultra-high pressure processing method suitable for fresh donkey milk |
CN107468710A (en) * | 2017-09-25 | 2017-12-15 | 东阿阿胶股份有限公司 | A kind of preparation method of high-quality donkey-hide gelatin |
CN109169897A (en) * | 2018-07-13 | 2019-01-11 | 贵州宏伟富康牧业养殖有限责任公司 | A kind of donkey fresh milk and its manufacture craft and method |
CN113973917A (en) * | 2021-09-24 | 2022-01-28 | 中国农业大学 | Donkey milk product and preparation method and application thereof |
CN114343014A (en) * | 2021-12-03 | 2022-04-15 | 新疆玉昆仑天然食品工程有限公司 | Donkey milk static and dynamic high-pressure combined sterilization process and application thereof |
CN114343100A (en) * | 2021-12-03 | 2022-04-15 | 新疆玉昆仑天然食品工程有限公司 | Method for preparing bergamot pear juice by combining static high pressure and ultrahigh pressure sterilization |
CN114343015A (en) * | 2021-12-03 | 2022-04-15 | 新疆玉昆仑天然食品工程有限公司 | Milk static and dynamic high-pressure combined sterilization process and application thereof |
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CN107468710B (en) * | 2017-09-25 | 2020-11-13 | 东阿阿胶股份有限公司 | Preparation method of high-quality donkey-hide gelatin |
CN109169897A (en) * | 2018-07-13 | 2019-01-11 | 贵州宏伟富康牧业养殖有限责任公司 | A kind of donkey fresh milk and its manufacture craft and method |
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CN114343014A (en) * | 2021-12-03 | 2022-04-15 | 新疆玉昆仑天然食品工程有限公司 | Donkey milk static and dynamic high-pressure combined sterilization process and application thereof |
CN114343100A (en) * | 2021-12-03 | 2022-04-15 | 新疆玉昆仑天然食品工程有限公司 | Method for preparing bergamot pear juice by combining static high pressure and ultrahigh pressure sterilization |
CN114343015A (en) * | 2021-12-03 | 2022-04-15 | 新疆玉昆仑天然食品工程有限公司 | Milk static and dynamic high-pressure combined sterilization process and application thereof |
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