CN105660850A - Cold sterilization method for removing goat milk smell - Google Patents
Cold sterilization method for removing goat milk smell Download PDFInfo
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- CN105660850A CN105660850A CN201410650474.0A CN201410650474A CN105660850A CN 105660850 A CN105660850 A CN 105660850A CN 201410650474 A CN201410650474 A CN 201410650474A CN 105660850 A CN105660850 A CN 105660850A
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Abstract
The present invention discloses a cold sterilization method for removing goat milk smell. Fresh goat milk is treated with impulse high-intensity magnetic field (15-20 T) under the condition of low temperature (3-8 DEG C), then the treated fresh goat milk is subjected to goaty flavour-removing treatment using a coriander extract, thereby killing the activity of microorganisms and modified enzymes in the fresh goat milk, greatly keeping original nutrient components, sensory quality and pure taste of the goat milk. The cold sterilization method provided by the invention can effectively kill microorganisms and inactivating food enzyme activity to ensure food safety, and can maintain the nutrition value of food and color, flavor, taste and other sensory quality at a low temperature, mainly aiming at total numbers of colony, Escherichia coli, mold and yeast and other microbial contamination problems of the fresh goat milk, as well as enzymes that can cause food spoilage, so that microbiological indicators of the goat milk can meet the requirements of commercial sterility.
Description
Technical field
The invention belongs to food processing technology field, particularly relate to the sterilization method that a kind of sheep milk de-tastes.
Background technology
Sheep milk is nutritious, does not contain only the protein of high-quality, abundant mineral, and contain vitamin and the panimmunity active factors of needed by human body, its nutritive value is higher than milk, and long-term drink sheep milk will not cause obesity, is referred to as " king in milk ". At present, the sterilization processing to sweet milk both at home and abroad, main employing heating power method, including pasteurize and ultra high temperature short time sterilization (UHT). The ultra high temperature short time sterilization shelf-life was up to 9～12 months, but the nutritional labeling and flavor substance impact on sheep milk is relatively big, and easily made sheep milk produce " steaming and decocting taste "; Although pasteurize milk nutritive loss is few, but the shelf-life is short, in addition it is also necessary to cold chain storage transport. Generally speaking, pasteurization not only results in the loss of nutritional labeling, also can affect the organoleptic quality of food, there are some shortcomings being difficult to overcome.
Cold sterilization is that Recent study utilizes more a kind of sterilization technology, owing in this technology sterilization process, food temperature does not raise or raise very low, not only improve and keep the physiologically active of functional component in food, be conducive to again keeping color and the nutritional labeling of functional food. Therefore, seeking a kind of shelf-life that can extend sheep milk can preserve again its intrinsic nutritive value and local flavor to greatest extent, and the method for disinfection tool of energy efficient is of great significance simultaneously.
The biological effect adopting more than IOT pulsed magnetic field carries out the blunt enzyme that sterilizes, and is placed in by food material in impulse magnetic field sterilization kettle, and pulsactor produces high intensity arteries and veins juice magnetic field in coil, thus blunt enzyme that food material is sterilized. The magnetic field blunt enzyme of sterilization is based primarily upon its biological effect, mainly has the metabolic process etc. affecting electron transmission, free radical activity, protein and the activity of enzyme, biomembrane infiltration, genetic change and biology. The feature of pulsed magnetic field method for disinfection is: sterilizing time is short and efficiency is high; Bactericidal effect is good and temperature rise amplitude is little; Can sterilize and the original local flavor of food, color and luster, quality and component can be kept constant, not polluted product, noiseless, applied widely.
Research currently, with respect to the bactericidal effect of pulsed magnetic field is more. But concentrating the pulse magnetic field treatment at normal temperatures or under temperature higher strip part, magnetic field intensity majority is below IOT, and under low temperature, the intensity impulse magnetic field more than more than 15T has no report.And, due to containing capric acid and acetic acid in sheep milk, both has volatile flavor, fresh sheep milk is made to have strong smell of mutton, at present, the conventional method that sheep milk de-tastes is to add Jasmine tea when heating sheep milk, but owing to making sheep milk nutrient loss serious under hot conditions, therefore, a kind of sheep milk processing method that can remove smell of mutton at low temperatures is sought necessary.
The present invention is with total plate count, escherichia coli, mycete yeast etc. in fresh sheep milk for object, fresh sheep milk is carried out cold sterilization processing by the impulse magnetic field adopting more than 15T under 3～8 DEG C of cryogenic conditions, it is passivated the vigor of the enzymes such as the peroxidase in sheep milk, lipase, and makes microbiological indicator in sheep milk reach the standard of commercial sterilization. It is an object of the invention to overcome the shortcoming of prior art, it is provided that the sterilization method of a kind of milk. The present invention adopts the impulse magnetic field of more than 15T under 3～8 DEG C of cryogenic conditions, and fresh milk is processed, thus killing the vigor of micro-life and inactive enzyme in fresh milk, greatly keeps the nutritious composition in milk Central Plains and organoleptic quality.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that the sterilization method of a kind of sheep milk. The present invention adopts the impulse magnetic field of more than 15T under 3～8 DEG C of cryogenic conditions, and fresh sheep milk is processed, thus killing the vigor of micro-life and inactive enzyme in fresh sheep milk, greatly keeps the nutritious composition in sheep milk Central Plains and organoleptic quality.
Present invention is generally directed to the microbiological pollutions such as total plate count in fresh sheep milk, escherichia coli, mycete yeast, and can result in the enzyme of food apoilage, propose a kind of effectively killing microorganisms and passivation enzyme food is lived, ensure food safety, also to keep the sterilization method under the low temperature of the organoleptic quality such as nutritive value of food and color, so that the microbiological indicator in sheep milk reaches the requirement of commercial sterilization.
To achieve these goals, the present invention adopts the following technical scheme that
The sterilization method that a kind of sheep milk de-tastes, it is characterised in that: the method is that sheep milk applies the pulsed magnetic field of 18～25T at 3～8 DEG C, comprises the following steps:
1) pulse magnet is immersed in liquid nitrogen; Magnetic field intensity and umber of pulse are set;
2) fresh sheep milk is cooled to 3～8 DEG C, adds Herba Coriandri extracting solution; Then, ultrasonic mixing 15～30 minutes, described Herba Coriandri extracting solution addition is: calculate by volume, fresh sheep milk: extracting solution=60:1;
3) sheep milk that temperature is 3～8 DEG C is put in magnetic field;
4), after pulsed magnetic field quits work, sample is taken out;
Described magnetic field intensity is 18～25T.
The umber of pulse of described pulsed magnetic field is 9 or 12.
The pulse width of described pulsed magnetic field is l0ms, and the pulse spacing is 15s.
Compared with existing sheep milk method for disinfection, the beneficial effects of the present invention is: low temperature pulse high-intensity magnetic field method for disinfection is used for sheep milk sterilization, can effectively reduce micro organism quantity in sheep milk, in passivation sheep milk, enzyme is lived, and is conducive to the fresh-keeping of sheep milk, and its advantage mainly has:
1) adopt the impulse magnetic field sterilization carrying out sheep milk under 3～8 DEG C of low temperature, blunt effectively kill microorganism inactive enzyme in sheep milk, greatly keep original taste and flavor of fresh sheep milk under cryogenic, it is achieved cold sterilization truly.
2) in the present invention, sheep milk etc. liquid material is almost without temperature rise, so the organizational structure of material, nutritional labeling, color all do not go to pot, without influence on original local flavor.
3) distance coil about 2m place magnetic field intensity decays to and is equivalent to absolute force, and therefore magnetic leakage free problem, safety is good.
4) generation of pulsed magnetic field and stop rapidly, it is simple to use computer control.
5) owing to food is had stronger penetration capacity by impulse magnetic field, going deep into the inside of food, it can in addition contain by Flow of Goods and Materials, can strengthen the stirring mass transfer effect of liquid material, cause sterilizing without dead angle, sterilization is thoroughly.
6) present invention adds Herba Coriandri extracting solution before sterilization, then adopts ultrasonic mixing dispersion, is homogeneously dispersed in sheep milk by the effective ingredient of extracting solution so that sheep milk smell of mutton eliminates, and taste is more preferably.
Detailed description of the invention
The following is embodiment and be intended to illustrate the present invention rather than the present invention further limits.
The pulsed magnetic field apparatus that the present invention adopts intensity to be 15-20T, this loading amount is made up of pulse magnet, the pulse power and corresponding control system and operation interface. Utilize ImF/7.2kV capacitor power, this device can in 28mm magnet aperture the highest generation field intensity 20T, the impulse magnetic field of pulse width lOms and pulse spacing be 15s, chamber temperature is below 8 DEG C.
Embodiment 1
With fresh sheep milk for processing object, adopt impulse magnetic field device to process, with total plate count, escherichia coli, mycete yeast for microbiological indicator, with lactoperoxidase, lipase, catalase for enzyme index, investigate the impulse magnetic field blunt enzyme effect of sterilization.
The sterilization method that a kind of sheep milk de-tastes, specifically comprises the following steps that
1) pulse magnet is immersed in liquid nitrogen; Magnetic field intensity 18.69T is set and umber of pulse is 9;
2) fresh sheep milk is cooled to 5 DEG C, adds Herba Coriandri extracting solution; Then, ultrasonic mixing 18 minutes, described Herba Coriandri extracting solution addition is: calculate by volume, fresh sheep milk: extracting solution=60:1;
3) sheep milk that temperature is 5 DEG C is put in magnetic field;
4), after pulsed magnetic field quits work, sample is taken out, sterilizes complete;
The sheep milk of 5 DEG C adopt 9 pulses, the impulse magnetic field process of magnetic field intensity 18.69T processes, record wherein color and luster, structural state and there is no any change, abnormal smells from the patient test and appraisal value reduces 72.8%, record wherein protein, fat, lactose loss rate respectively 0.49%, 0.25%, 0.18%, record titratable acidity, turbidity rate of change is 0.3%, 2.54%.
Same pulsed magnetic field is adopted to process in 8 DEG C of fresh sheep milk, record wherein color and luster, structural state and there is no any impact, abnormal smells from the patient test and appraisal value reduction by 75.1%, record wherein protein, fat, lactose loss rate respectively 0.56%, 0.33%, 0.24%, record titratable acidity, turbidity rate of change is 0.34%, 3.18%.
And after adopting same impulse magnetic field to process in 25 DEG C of milk, record wherein color and luster, structural state and any change does not occur, abnormal smells from the patient test and appraisal value reduction by 78.3%, record wherein protein, fat, lactose loss rate respectively 3.46%, 2.47%, 2.20A, record titratable acidity, turbidity rate of change is 2.7%, 6%.
As can be seen here, under low temperature at 5 DEG C and 10 DEG C after impulse magnetic field processes, the change of physical and chemical index and nutritive index is all little compared with under room temperature, and the result difference of 5 DEG C and 10 DEG C is also inconspicuous. And this is because process under cryogenic conditions; the nutritional labeling in sheep milk can be better protected not to be destroyed; and decrease the abnormal smells from the patient change that the contingent physical and chemical mutagenesis of sheep milk under room temperature causes; change etc. with turbidity acidity; as long as processing below 10 DEG C, its indices can be maintained in a good scope.And, adopt Herba Coriandri extracting solution that sheep milk is de-tasted process, after magnetic field under low temperature processes, its smell of mutton reducing amount is about 75%, and the reducing amount under room temperature is suitable with the decreasing value under low temperature, achieves good effect.
Claims (4)
1. the sterilization method that a sheep milk de-tastes, it is characterised in that: the method is that sheep milk applies the pulsed magnetic field of 18～25T at 3～8 DEG C, comprises the following steps:
1) pulse magnet is immersed in liquid nitrogen; Magnetic field intensity and umber of pulse are set;
2) fresh sheep milk is cooled to 3～8 DEG C, adds Herba Coriandri extracting solution; Then, ultrasonic mixing 15～30 minutes, described Herba Coriandri extracting solution addition is: calculate by volume, fresh sheep milk: extracting solution=60:1;
3) sheep milk that temperature is 3～8 DEG C is put in magnetic field;
4), after pulsed magnetic field quits work, sample is taken out.
2. the sterilization method that a kind of sheep milk as claimed in claim 1 de-tastes, it is characterised in that: described magnetic field intensity is 18～25T.
3. the sterilization method that a kind of sheep milk as claimed in claim 1 de-tastes, it is characterised in that: the umber of pulse of described pulsed magnetic field is 9 or 12.
4. the sterilization method that a kind of sheep milk as claimed in claim 1 de-tastes, it is characterised in that: the pulse width of described pulsed magnetic field is l0ms, and the pulse spacing is 15s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410650474.0A CN105660850A (en) | 2014-11-17 | 2014-11-17 | Cold sterilization method for removing goat milk smell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410650474.0A CN105660850A (en) | 2014-11-17 | 2014-11-17 | Cold sterilization method for removing goat milk smell |
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| CN105660850A true CN105660850A (en) | 2016-06-15 |
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| CN201410650474.0A Pending CN105660850A (en) | 2014-11-17 | 2014-11-17 | Cold sterilization method for removing goat milk smell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107372820A (en) * | 2017-08-28 | 2017-11-24 | 纽鸿（大连）乳品科技股份有限公司 | Goat milk method for disinfection |
| EP3666080A4 (en) * | 2017-08-09 | 2021-07-07 | Inner Mongolia Yili Industrial Group Co., Ltd. | De-muttony goat milk, preparation method therefor and goat milk products |
-
2014
- 2014-11-17 CN CN201410650474.0A patent/CN105660850A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3666080A4 (en) * | 2017-08-09 | 2021-07-07 | Inner Mongolia Yili Industrial Group Co., Ltd. | De-muttony goat milk, preparation method therefor and goat milk products |
| CN107372820A (en) * | 2017-08-28 | 2017-11-24 | 纽鸿（大连）乳品科技股份有限公司 | Goat milk method for disinfection |
| CN107372820B (en) * | 2017-08-28 | 2020-03-10 | 纽鸿（大连）乳品科技股份有限公司 | Goat milk sterilization method |
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