CN103385292A - Method for processing infant milk powder by wet process - Google Patents
Method for processing infant milk powder by wet process Download PDFInfo
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- CN103385292A CN103385292A CN201310348490XA CN201310348490A CN103385292A CN 103385292 A CN103385292 A CN 103385292A CN 201310348490X A CN201310348490X A CN 201310348490XA CN 201310348490 A CN201310348490 A CN 201310348490A CN 103385292 A CN103385292 A CN 103385292A
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Abstract
The invention provides a method for processing infant milk powder by a wet process, comprising the steps of fresh milk pretreatment, sterilization, concentration, drying and milk powder post-treatment, wherein the sterilization step comprises high speed centrifugation sterilization at normal temperature and then pasteurization. The infant milk powder prepared by the method provided by the invention has a good sterilization effect, reduces loss of nutrients in milk, greatly lowers the content of dead bacteria in milk, and solves the problems of poor milk powder instant property, small particle, poor uniformity and insufficient dissolution.
Description
Technical field
The invention belongs to food technology field, be specifically related to a kind of method of wet method processing baby milk powder.
Background technology
China is one of maximum in the world milk powder market, and high-grade baby formula milk powder market develops rapidly with the growth rate of annual 13%-16%, becomes the high-grade baby formula milk powder market of the world's second largest that is only second to the U.S..Especially a new round " baby boom " occurs from China in 2008, the huge neonate consumer group is pregnant with the larger market space for Chinese Infant and Children milk powder market.But for a long time, China's baby milk powder market is monopolized by foreign brand name always.The ratio of the baby formula milk powder that China's Dairy Enterprise is produced is far less than 1/3rd of production milk powder total amount, and some domestic milk powder manufacturing enterprises have aimed at this market one after another, release corresponding product, and hope can gain a place.Xinjiang baby formula milk powder market comsupton total value 3-4 hundred million nearly according to statistics, and so far, Xinjiang does not also have an enterprise to produce baby formula milk powder.
Formula milk adopts dry process more, and various raw material are mixed under solid, powdery, although this mode technique is simple, production cost is low, shortcoming is that the various nutrients in being difficult to guarantee to fill a prescription mix.And adopt the dairy processing enterprise in own milk source to use wet method milk flour producing process more, carry out various raw-material mixing under the fresh milk liquid state, the operations such as the drying of dusting through high temperature again are reduced into powdery, wet processing more can guarantee freshness and the nutritive value of final products, guarantee mixing of various nutrients, especially the middle and high end baby formula milk powder has also added various functional nutrient elements with thermal sensitivity especially to promote the growth of infant's intelligence and physique.But complex process, production cost are high.High temperature sterilization technique is mostly adopted in the production of domestic milk powder wet processing, has also destroyed the nutrient in milk in high temperature sterilization, also can't kill all bacteriums, as resistant to elevated temperatures bacillus category but at present.In addition, the domestic formula milk of China often because instant capacity is good not, particle is little, the problem of the dissolving ability such as lack of homogeneity, dissolving be insufficient, and extremely consumers in general's query, become a large bottleneck of domestic brand milk powder quality-improving.And control the milk powder grain diameter, and be the key of effectively improving milk powder dissolving and brew, promote by the improvement to the production technology key technology, can effectively improve the milk powder graininess, greatly improve product cut size uniformity and dissolving, brew.
Summary of the invention
The invention provides the method for a kind of wet method processing baby milk powder, application the method, when not causing nutrient loss, kill bacterium in raw milk fully, and the milk powder instant capacity of preparation is good, uniform particles, dissolving are abundant.
The method of a kind of wet method processing baby milk powder provided by the invention, comprise fresh milk pre-treatment, sterilization, concentrated, dry, milk powder post-processing step, and wherein, described sterilisation step is first high speed centrifugation degerming at normal temperatures, then uses the degerming of Pasteur's method.
The process for sterilizing of the raw milk of commonly using at present: the high temperature sterilization method, as high temperature, high-temperature instantaneous sterilization, main principle is all that raise temperature (usually need to be warming up to 137 ℃-142 ℃) kill microorganisms by the way of heating.Although microorganism has been killed, but mainly contain the shortcoming of two aspects: 1. cause the loss of nutrient, because a lot of bioactivators are arranged in milk, these bioactivators are all much thermal sensitivity, comprise some water soluble vitamins, so high temperature sterilization has destroyed nutrient: 2. have lethal thalline, after high temperature sterilization, bacterium is not had, but dead thalline also exists.
At first the present invention selects to make at normal temperatures the raw milk high speed centrifugation, because bacillus has relatively high density, generally up to 1.2-1.3g/L, bacterial density is usually less than gemma, and the bacillus in milk raw material can be effectively removed in the centrifugation of employing high-speed sealing.Because the normal temperature high speed centrifugation can not be removed bacterium in raw milk fully, also must carry out combination with the conventional heating sterilization technology, the present invention carries out the degerming of Pasteur's method after being chosen in the normal temperature high speed centrifugation, adopt the dry further sterilization of mode after killing most of viable bacteria, thereby when not causing nutrient loss, guaranteed 100% degerming.
Further, the degerming of described high speed centrifugation at normal temperatures is to carry out at normal temperatures high speed centrifugation 2 times, and centrifugal rotational speed is 5000 ± 120 to turn/min, centrifugal 5min, and treating capacity is 10000 ± 500kg/h; Preferably, centrifugal rotational speed 5100 turns/min, time 5min, treating capacity 10000kg/h.
Can effectively remove 98% anaerobic spore-bearing bacilli microorganism, 95% aerobic bacillus in this parameter area, reduce total bacteria count approximately 86%, wherein with centrifugal rotational speed 5100, turn/min, time 5min, during treating capacity 10000kg/h, bacteria-eliminating efficacy is best.
Further, the degerming of described Pasteur's method is to process 15-20s under 80 ℃-90 ℃; Preferably, described degerming is to process 15s under 85 ℃.
Use at low temperatures the degerming of Pasteur's method, compared to the degerming of common Pasteur's method, reduced the loss of nutrient in milk.Two kinds of degerming methods of the present invention combine removal of bacteria rate in raw milk are reached more than 98.5%.
Further, described drying is at first to adopt spray-drying, and then uses the horizontal type fluidized-bed drying of carrying out.
Two kinds of uniform particles and solubility that drying means combines and can well improve baby milk powder.Utilize simultaneously the further degerming of method of dual drying, remaining viable bacteria is killed fully, reach the purpose of complete sterilization.Two kinds of drying means are in conjunction with making the milk powder grain diameter between 0.3-0.35mm, solubility is not to measure the size of the meltage of milk powder in fact in milk powder, be on the contrary measure do not dissolve index, this product not solubility exponent is under 24 ℃ of conditions, less than 0.1mL.(measure and carry out according to IDF 129-2005).
If it is not very even adopting the milk powder particle diameter that single spray drying process obtains, generally at 0.25-0.40mm, even scope is larger.Product not solubility exponent is under 24 ℃ of conditions, less than 0.1-0.2mL.
Further, described spray-dired parameter is: water evaporation quantity 1000kg/h, steam pressure 0.6-0.8MPa, EAT 150-160 ℃, temperature of outgoing air 75-85 ℃; Preferably, spray-dired parameter is: water evaporation quantity 1000kg/h, steam pressure 0.7Mpa, 160 ℃ of EATs, 80 ℃ of temperature of outgoing airs.
After dry under this technological parameter, product moisture content is down to 19.5%-21%, and wherein spray-dired parameter is: water evaporation quantity 1000kg/h, steam pressure 0.7Mpa, when 160 ℃ of EATs, 80 ℃ of temperature of outgoing airs, drying effect is best, at this moment, product moisture content is down to 19.5%.
Further, describedly use horizontal type fluidized-bed technological parameter while carrying out drying to be nominal shake frequency 980 times, time of staying 2-3 minute, maximum exciting force 10000N.
Moisture under this technological parameter in the product of dry gained meets national standard, and moisture is 2.8%, can well improve uniform particles, the solubility of milk powder simultaneously, and at this moment, solubility exponent is not under 24 ℃ of conditions, less than 0.1mL.(measure and carry out according to IDF 129-2005).
Second purpose of the present invention is to provide the baby milk powder of said method preparation.
Preferably, in described baby milk powder, the quantity of dead thalline is the 13.5%-15% of total bacteria count in fresh milk.
Owing at first adopting centrifugal method to remove bacterium, therefore, in the baby milk powder of preparation, the quantity of dead thalline reduces in a large number, makes baby milk powder of the present invention much cleaner.
Preferably, in described baby milk powder the quantity of the dead thalline of anaerobic spore-bearing bacilli be in fresh milk anaerobic spore-bearing bacilli quantity 2%, the quantity of the dead thalline of aerobic bacillus be in fresh milk anaerobic spore-bearing bacilli quantity 5%.
Owing at first adopting centrifugal method to remove bacterium, therefore, in the baby milk powder of preparation, the quantity of the dead thalline of bacillus reduces in a large number, makes baby milk powder of the present invention much cleaner.
Preferably, the grain diameter of described baby milk powder is 0.30-0.35mm.
The present invention combines the two sterilization technique of normal temperature with traditional pasteurize technology, optimizing raw material breast pretreating process; By the two sterilization technique of normal temperature, the clearance rate of thalline is reached more than 98%,, in conjunction with pasteurize and later stage drying process, guarantee to produce aseptic milk powder.By spray-drying and fluidized bed drying condition optimizing orthogonal test, determine optimal milk dried bean noodles drying process condition, final production goes out to meet the high-quality baby formula milk powder of national standard.
The baby milk powder of applying method of the present invention preparation has reached good bacteria-eliminating efficacy, has reduced simultaneously the loss of nutrient in milk, decrease the content of dead thalline in milk; Solved that the milk powder instant capacity is bad, lack of homogeneity, the inadequate problem of dissolving.
The specific embodiment
Following embodiment is convenient to understand better the present invention, but does not limit the present invention.Experimental technique in following embodiment, if no special instructions, be conventional method.
Embodiment 1
The step of the method for wet method processing baby milk powder of the present invention is as follows:
(1) fresh milk is checked and accepted: raw milk should meet the production specifications (NY-5054-2001) of nuisanceless Fresh Milk, and indices (sense organ, index, physical and chemical index and microbiological indicator) will be stipulated the condition that Fresh Milk is checked and accepted in conjunction with China simultaneously.Raw milk must be fresh, can not be mixed with abnormal milk, and proportion should be 1.028-1.032(20 ℃), acidity is no more than 20 ° of T, and fat content is not less than 3.1%, and milk solids is not less than 11.5%.
(2) clean breast: filter with 80-120 order silk, clean newborn rear impurity is less than 0.2ppm;
(3) cooling storage, standardization: be cooled to below 8 ℃ and store;
(3) homogeneous: homogenizing temperature 40-50 ℃, pressure 15-20Mpa, after homogeneous, particle size does not require;
(4) cooling, temporary: cooling below 10 ℃, the temporary 12h that is no more than;
(5) the two degerming of normal temperature: application milk separator (Russia-Si Mei contract card pula Fu Sike machine-building limited company, model: 5-OC2-HC00.000) carry out high speed centrifugation 2 times, centrifugal rotational speed is 5100 to turn/min, and centrifugation time is 5min, and treating capacity is 10000kg/h; The two sterilization of normal temperature can effectively be removed 98% anaerobic spore-bearing bacilli microorganism, 95% aerobic bacillus, reduce total bacteria count approximately 86%;
(6) pasteurize: 85 ℃ of sterilization temperatures, processing time 15s; Two kinds of degerming methods combine removal of bacteria rate in raw milk are reached more than 98.5%.
(7) concentrated: that the raw milk after step (6) sterilization is carried out sterilization, sterilization temperature 110-120 ℃ (4s), sterilization vacuum-0.045MPa, entering triple effect evaporator concentrates again, one effect evaporating temperature 68-70 ℃, one effect separator vacuum 0.006MPa, two effect evaporating temperature 55-60 ℃, two effect separator vacuum 0.003MPa, triple effect evaporation temperature 44-50 ℃, triple effect separator vacuum 0.004MPa, EAT 150-170 ℃, temperature of outgoing air 82-88 ℃, be concentrated into 0.5kg/L with raw milk;
(8) spray-drying: application vertical pressure spray-drying unit (light machine dairy products equipment Co., Ltd in Beijing, model: RGYP03) carry out spray-drying, water evaporation quantity 1000kg/h, steam pressure 0.7MPa, 160 ℃ of EATs, 80 ℃ of temperature of outgoing airs; Product moisture content is down to 19.5%.
(9) fluidized bed drying: adopt horizontal type fluidized-bed dry technology the moisture in raw milk to be down to the requirement (≤5%) of national standard, technological parameter is: nominal shake frequency 980 times, time of staying 2-3 minute, maximum exciting force 10000N, dry rear product moisture content is 2.8% after measured; At this moment, solubility exponent is not under 24 ℃ of conditions, less than 0.1mL.(measure and carry out according to IDF 129-2005).
(10) connect powder, the storage powder, the inspection of semifinished product, packing, product inspection, put in storage, dispatch from the factory.
Embodiment 2
The step of the method for wet method processing baby milk powder of the present invention is as follows:
(1) fresh milk is checked and accepted: raw milk should meet the production specifications (NY-5054-2001) of nuisanceless Fresh Milk, and indices (sense organ, index, physical and chemical index and microbiological indicator) will be stipulated the condition that Fresh Milk is checked and accepted in conjunction with China simultaneously.Raw milk must be fresh, can not be mixed with abnormal milk, and proportion should be 1.028-1.032(20 ℃), acidity is no more than 20 ° of T, and fat content is not less than 3.1%, and milk solids is not less than 11.5%.
(2) clean breast: filter with 80-120 order silk, clean newborn rear impurity is less than 0.2ppm;
(3) cooling storage, standardization: be cooled to below 8 ℃ and store;
(3) homogeneous: homogenizing temperature 40-50 ℃, pressure 15-20Mpa, after homogeneous, particle size does not require;
(4) cooling, temporary: cooling below 10 ℃, the temporary 12h that is no more than;
(5) the two degerming of normal temperature: application milk separator (Russia-Si Mei contract card pula Fu Sike machine-building limited company, model: 5-OC2-HC00.000) carry out high speed centrifugation 2 times, centrifugal rotational speed is 4080 to turn/min, and centrifugation time is 5min, and treating capacity is 9500kg/h;
(6) pasteurize: 80 ℃ of sterilization temperatures, processing time 18s;
(7) concentrated: that the raw milk after step (6) sterilization is carried out sterilization, sterilization temperature 110-120 ℃ (4s), sterilization vacuum-0.045MPa, entering triple effect evaporator concentrates, one effect evaporating temperature 68-70 ℃, one effect separator vacuum 0.006MPa, two effect evaporating temperature 55-60 ℃, two effect separator vacuum 0.003MPa, triple effect evaporation temperature 44-50 ℃, triple effect separator vacuum 0.004MPa, EAT 150-170 ℃, temperature of outgoing air 82-88 ℃, be concentrated into 0.5kg/L with raw milk;
(8) spray-drying: application vertical pressure spray-drying unit (light machine dairy products equipment Co., Ltd in Beijing, model: RGYP03) carry out spray-drying, water evaporation quantity 1000kg/h, steam pressure 0.6MPa, 150 ℃ of EATs, 75 ℃ of temperature of outgoing airs;
(9) fluidized bed drying: adopt horizontal type fluidized-bed dry technology the moisture in raw milk to be down to the requirement (≤5%) of national standard, technological parameter is: nominal shake frequency 980 times, time of staying 2-3 minute, maximum exciting force 10000N, dry rear product moisture content is 2.8% after measured;
(10) connect powder, the storage powder, the inspection of semifinished product, packing, product inspection, put in storage, dispatch from the factory.
Embodiment 3
The step of the method for wet method processing baby milk powder of the present invention is as follows:
(1) fresh milk is checked and accepted: raw milk should meet the production specifications (NY-5054-2001) of nuisanceless Fresh Milk, and indices (sense organ, index, physical and chemical index and microbiological indicator) will be stipulated the condition that Fresh Milk is checked and accepted in conjunction with China simultaneously.Raw milk must be fresh, can not be mixed with abnormal milk, and proportion should be 1.028-1.032(20 ℃), acidity is no more than 20 ° of T, and fat content is not less than 3.1%, and milk solids is not less than 11.5%.
(2) clean breast: filter with 80-120 order silk, clean newborn rear impurity is less than 0.2ppm;
(3) cooling storage, standardization: be cooled to below 8 ℃ and store;
(3) homogeneous: homogenizing temperature 40-50 ℃, pressure 15-20Mpa, after homogeneous, particle size does not require;
(4) cooling, temporary: cooling below 10 ℃, the temporary 12h that is no more than;
(5) the two degerming of normal temperature: application milk separator (Russia-Si Mei contract card pula Fu Sike machine-building limited company, model: 5-OC2-HC00.000) carry out high speed centrifugation 2 times, centrifugal rotational speed is 5120 to turn/min, and centrifugation time is 5min, and treating capacity is 10500kg/h;
(6) pasteurize: 90 ℃ of sterilization temperatures, processing time 20s;
(7) concentrated: that the raw milk after step (6) sterilization is carried out sterilization, sterilization temperature 110-120 ℃ (4s), sterilization vacuum-0.045MPa, entering triple effect evaporator concentrates, one effect evaporating temperature 68-70 ℃, one effect separator vacuum 0.006MPa, two effect evaporating temperature 55-60 ℃, two effect separator vacuum 0.003MPa, triple effect evaporation temperature 44-50 ℃, triple effect separator vacuum 0.004MPa, EAT 150-170 ℃, temperature of outgoing air 82-88 ℃, be concentrated into 0.5kg/L with raw milk;
(8) spray-drying: application vertical pressure spray-drying unit (light machine dairy products equipment Co., Ltd in Beijing, model: RGYP03) carry out spray-drying, water evaporation quantity 1000kg/h, steam pressure 0.8MPa, 160 ℃ of EATs, 85 ℃ of temperature of outgoing airs;
(9) fluidized bed drying: adopt horizontal type fluidized-bed dry technology the moisture in raw milk to be down to the requirement (≤5%) of national standard, technological parameter is: nominal shake frequency 980 times, time of staying 2-3 minute, maximum exciting force 10000N, dry rear product moisture content is 2.8% after measured;
(10) connect powder, the storage powder, the inspection of semifinished product, packing, product inspection, put in storage, dispatch from the factory.
The baby milk powder of method in Application Example preparation is in the situation that cause the loss of nutrient, kill bacteria fully, simultaneously decrease the quantity of dead thalline in milk powder; Apply method of the present invention, the milk powder grain diameter between 0.3-0.35mm, uniform particles; Instant capacity is good, can be dissolved in fast in hot water; Under 24 ℃ of conditions, solubility exponent is not measured and is carried out according to IDF 129-2005 less than 0.1mL().
It should be noted that finally: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment, the present invention is had been described in detail, for a person skilled in the art, it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the method for a wet method processing baby milk powder, comprise fresh milk pre-treatment, sterilization, concentrated, dry, milk powder post-processing step, and it is characterized in that: described sterilisation step is first high speed centrifugation degerming at normal temperatures, then uses the degerming of Pasteur's method.
2. method according to claim 1 is characterized in that: the degerming of described high speed centrifugation at normal temperatures is to carry out at normal temperatures high speed centrifugation 2 times, and centrifugal rotational speed is 5000 ± 120 to turn/min, centrifugal 5min, and treating capacity is 10000 ± 500kg/h; Preferably, centrifugal rotational speed 5100 turns/min, time 5min, treating capacity 10000kg/h.
3. method according to claim 1 and 2, it is characterized in that: the degerming of described Pasteur's method is to process 15-20s under 80 ℃-90 ℃; Preferably, described degerming is to process 15s under 85 ℃.
4. according to claim 1-3 arbitrary described methods, it is characterized in that: described drying is at first to adopt spray-drying, and then uses the horizontal type fluidized-bed drying of carrying out.
5. method according to claim 4, it is characterized in that: described spray-dired parameter is: water evaporation quantity 1000kg/h, steam pressure 0.6-0.8MPa, EAT 150-160 ℃, temperature of outgoing air 75-85 ℃; Preferably, spray-dired parameter is: water evaporation quantity 1000kg/h, steam pressure 0.7Mpa, 160 ℃ of EATs, 80 ℃ of temperature of outgoing airs.
6. method according to claim 4 is characterized in that: describedly use horizontal type fluidized-bed technological parameter while carrying out drying to be nominal shake frequency 980 times, time of staying 2-3 minute, maximum exciting force 10000N.
7. application rights requires the baby milk powder of the arbitrary described method preparation of 1-6.
8. baby milk powder according to claim 7 is characterized in that: in described baby milk powder, the quantity of dead thalline is the 13.5%-15% of total bacteria count in fresh milk.
9. baby milk powder according to claim 7, it is characterized in that: in described baby milk powder the quantity of the dead thalline of anaerobic spore-bearing bacilli be in fresh milk anaerobic spore-bearing bacilli quantity 2%, the quantity of the dead thalline of aerobic bacillus be in fresh milk anaerobic spore-bearing bacilli quantity 5%.
10. baby milk powder according to claim 7, it is characterized in that: the grain diameter of described baby milk powder is 0.30-0.35mm.
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| CN107125323A (en) * | 2017-07-17 | 2017-09-05 | 湖南贝恩叮当猫婴童用品有限公司 | A kind of production technology of baby milk powder |
| CN111887297A (en) * | 2020-06-24 | 2020-11-06 | 石家庄君乐宝乳业有限公司 | Preparation method of infant formula milk powder with natural bioactivity |
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Application publication date: 20131113 |