WO2009049450A1 - Procédé de stérilisation associé incluant de l'ozone, un rayonnement ultraviolet et un revêtement constitué de nano-particules d'argent pour préserver la qualité d'un aliment lyophilisé - Google Patents
Procédé de stérilisation associé incluant de l'ozone, un rayonnement ultraviolet et un revêtement constitué de nano-particules d'argent pour préserver la qualité d'un aliment lyophilisé Download PDFInfo
- Publication number
- WO2009049450A1 WO2009049450A1 PCT/CN2007/003327 CN2007003327W WO2009049450A1 WO 2009049450 A1 WO2009049450 A1 WO 2009049450A1 CN 2007003327 W CN2007003327 W CN 2007003327W WO 2009049450 A1 WO2009049450 A1 WO 2009049450A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ozone
- freeze
- ultraviolet
- sterilization
- nano silver
- Prior art date
Links
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 55
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 54
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 49
- 235000013305 food Nutrition 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000000576 coating method Methods 0.000 title claims abstract description 27
- 239000011248 coating agent Substances 0.000 title claims abstract description 25
- 238000012423 maintenance Methods 0.000 title abstract 2
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 235000012055 fruits and vegetables Nutrition 0.000 claims description 2
- 235000013372 meat Nutrition 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 244000005700 microbiome Species 0.000 abstract description 19
- 241000193830 Bacillus <bacterium> Species 0.000 abstract 1
- 210000002429 large intestine Anatomy 0.000 abstract 1
- 239000000047 product Substances 0.000 description 35
- 239000000523 sample Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000855 fermentation Methods 0.000 description 7
- 230000004151 fermentation Effects 0.000 description 7
- 235000015097 nutrients Nutrition 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 6
- 230000000844 anti-bacterial effect Effects 0.000 description 6
- 239000000796 flavoring agent Substances 0.000 description 6
- 235000019634 flavors Nutrition 0.000 description 6
- 241000588724 Escherichia coli Species 0.000 description 5
- 241000251511 Holothuroidea Species 0.000 description 5
- 235000013311 vegetables Nutrition 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003651 drinking water Substances 0.000 description 4
- 235000020188 drinking water Nutrition 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- GUBGYTABKSRVRQ-QKKXKWKRSA-N Lactose Natural products OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O GUBGYTABKSRVRQ-QKKXKWKRSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000003833 bile salt Substances 0.000 description 3
- 238000004108 freeze drying Methods 0.000 description 3
- 239000008101 lactose Substances 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910021642 ultra pure water Inorganic materials 0.000 description 3
- 239000012498 ultrapure water Substances 0.000 description 3
- 241000233866 Fungi Species 0.000 description 2
- 239000001888 Peptone Substances 0.000 description 2
- 108010080698 Peptones Proteins 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 235000015278 beef Nutrition 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 235000012041 food component Nutrition 0.000 description 2
- 239000005417 food ingredient Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 210000000936 intestine Anatomy 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 235000019319 peptone Nutrition 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 210000004215 spore Anatomy 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 240000004160 Capsicum annuum Species 0.000 description 1
- 235000008534 Capsicum annuum var annuum Nutrition 0.000 description 1
- 241000606161 Chlamydia Species 0.000 description 1
- 235000005206 Hibiscus Nutrition 0.000 description 1
- 235000007185 Hibiscus lunariifolius Nutrition 0.000 description 1
- 244000284380 Hibiscus rosa sinensis Species 0.000 description 1
- 244000141359 Malus pumila Species 0.000 description 1
- 241000204031 Mycoplasma Species 0.000 description 1
- 241000606701 Rickettsia Species 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 235000021016 apples Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 210000004666 bacterial spore Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 238000012792 lyophilization process Methods 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000009928 pasteurization Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/10—Coating with a protective layer; Compositions or apparatus therefor
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/015—Preserving by irradiation or electric treatment without heating effect
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/14—Preserving with chemicals not covered by groups A23B4/02 or A23B4/12
- A23B4/16—Preserving with chemicals not covered by groups A23B4/02 or A23B4/12 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/015—Preserving by irradiation or electric treatment without heating effect
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/16—Coating with a protective layer; Compositions or apparatus therefor
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/26—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by irradiation without heating
- A23L3/28—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by irradiation without heating with ultraviolet light
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
Definitions
- the invention relates to a combined sterilization method for the preservation of freeze-dried foods by ozone, ultraviolet and nano silver coating films, and belongs to the technical field of dry food safety control. Background technique
- the methods for solving the problem of microbial exceeding the standard of freeze-dried food include: The latest is the pasteurization of continuous electric heating, but because of the expensive equipment or the processing fee for processing, the product is invisibly improved. Cost; The general freeze-dried food production unit adopts simple ozone sterilization, and the phenomenon of E. coli exceeding the standard will still appear in the sterilized products.
- ozone sterilization Due to the low cost of ozone sterilization, no toxic side effects, and no loss of flavor and nutrients of the product, it is the most commonly used method for sterilizing freeze-dried food. Due to the special requirements of freeze-dried foods, thermal sterilization cannot be used. At the same time, the humidity in the environment must be strictly controlled during the sterilization process. Commonly used ozone sterilization, due to the influence of temperature and air humidity, has a limited sterilization effect and can only kill microorganisms on the surface of the product.
- microorganisms When the product is a lyophilized mixed food, microorganisms may exist inside and outside the product, so microorganisms that only kill the surface cannot solve the problem, and in the process of sterilizing ozone gas, the continuous consumption of ozone gas may result in the sealed container.
- the ozone concentration is getting lower and lower, which will make the sterilization effect weaker and weaker.
- Ultraviolet light can kill a variety of microorganisms, including bacteria, fungi, viruses and rickettsia.
- Gram-negative bacteria are most sensitive to UV light, followed by Gram-positive cocci, and bacterial spores and fungal spores are the most resistant.
- the virus can also be inactivated by ultraviolet light, and its resistance is between the bacterial propagule and the spore.
- Escherichia coli belongs to a strain that is low in resistance to ultraviolet light.
- Ultraviolet sterilization is also currently used to treat freeze-dried foods. However, the sterilization ability of pure ultraviolet sterilization is also weak, and ultraviolet sterilization can only kill microorganisms on the surface of the product or on the surface of the package. Therefore, if UV irradiation is used alone for bactericidal treatment, the effect is very weak.
- Nano-silver is a nano-scale silver particle whose atomic arrangement is a "mediation" between solid and molecule. This highly active nano-silver particle has superior antibacterial ability and can kill bacteria and fungi. Pathogenic microorganisms such as mycoplasma and chlamydia are inorganic antimicrobial agents with broad-spectrum antibacterial properties.
- Ozone sterilization belongs to the PPM grade, which produces only a very weak oxidation on the surface of food, which is not enough to affect the changes in the internal matter of food. Because ozone is easily decomposed, the half-life in the air is 20-50min, and there is no residue on the surface. China's food and nutrition department has analyzed the nutrient and flavor components of eggs, apples, and bell peppers stored in ozone, and compared with the control group, there is no significant difference. However, in order to facilitate direct packaging after treatment, conditions such as a certain temperature can be controlled to accelerate the degradation rate of residual ozone.
- the object of the present invention is to provide a method for pretreating and combining ozone with nano silver to study the combined sterilization of freeze-dried foods, which can be used for microbial safety control of various freeze-dried foods, especially large-sized and complex freeze-dried foods. .
- the sterilization treatment adopts the combined sterilization method of ozone, ultraviolet and nano silver coating film.
- the process is -
- Nano silver coating treatment The silver concentration of the nano silver solution is 0.04-0.05ppm, and the raw materials of the freeze-dried food are immersed in the nano silver solution for 30-45 seconds for coating treatment; the raw materials after the coating treatment are frozen. Dry processing to obtain a freeze-dried food piece;
- Ozone and ultraviolet sterilization treatment the lyophilized food treated with nano silver coating film is placed in the sealed air bag of air, filled with 3-5 seconds of ozone gas, and then immediately sealed, and then on the outside of the sealed pocket. Put on a sealed air bag, and then seal the mouth with ozone gas for 15-20 seconds, then let the ozone enter the freeze-dried food for sterilizing treatment. Sterilize for 45-60 minutes.
- Raw materials for freeze-dried foods refer to fruits and vegetables, aquatic products, and freeze-dried raw materials for livestock meat.
- Freeze-dried food ingredients are single, several mixed or flavored food ingredients.
- the sterilizing process of the product is to pretreat the sample raw materials by nano-silver coating, and then sample and culture after ozone and ultraviolet sterilization, and observe the results and analyze the quality and nutrients of the sterilized products.
- the present invention is a bactericidal method that combines ozone with pressure and ultraviolet light and combines with nanosilver coating technology. Because of the pressure, the ozone gas can enter the gap between the products to kill the internal microorganisms; and the ultraviolet irradiation can both play a role of sterilization and maintain the concentration of ozone, because the UV lamp is in the line of 85 nm. Ozone can be generated in the air, and the energy contained in the 253.7 nm line can effectively destroy the DNA structure of the organic molecules, so that the loss of the organic molecules can inhibit the continuous division and reproduction of the organic molecules, thereby achieving the purpose of sterilization.
- nano-silver coating pretreatment can not only affect the safety of the product in a certain concentration range, but also a certain amount of pressure and ultraviolet irradiation will not lead to the quality change of the product and the loss of nutrient flavor components. .
- the raw materials are immersed in a nanosilver solution for 30 s, and then subjected to a freeze-drying production process, and the lyophilized samples are subjected to ozone sterilization treatment.
- Both the Chinese drinking water quality standard and the EU water quality standard require that the content of silver in drinking water does not exceed 0.05 ppm, and the concentration of nano silver used in the production process is below 0.05 ppm, generally 0.045 ppm.
- the whole piece of the sample was divided into two, and half of the sterilized treatment was used as a control.
- the sample was placed in a 9 x 13 sealed pouch at room temperature as a control.
- the other half of the sample was placed in a 9x 13 envelope that had been exhausted as much as possible, and then the ozone was turned on, and the ozone gas was passed through for 3 seconds and immediately sealed to form a sealed dry space containing ozone and sample.
- put a cover on the outside of this pocket 18x24 has been sealed as far as possible in the air, sealed with ozone gas for 15 seconds. Thereby forming a simple pressurized bag.
- the transparently packaged sample bag was then placed under an ultraviolet lamp and subjected to irradiation sterilization for 60 minutes.
- the total number of bacteria and the coliform group of the control sample exceeded the standard, and the sterilized sample can be used to carry the microorganism.
- the total amount is controlled within 1000/g, and the coliform (or E. coli) is up to standard (negative).
- the semi-finished product can be directly packaged, and the degradation rate of residual ozone can be accelerated by appropriately lowering the temperature and changing the pressure.
- the temperature drops to about 15
- the decomposition rate of ozone can be increased by about one time. Proper pressure reduction also contributes to ozone decomposition.
- the related research of the present invention found that the effect of the nano silver coating film is continuous, and the nano silver particles can continue to act on other bacteria after oozing out from the bacteria. Moreover, the effect of nano-silver coating is stable, 'will not be affected by temperature, pressure and other factors. However, it is difficult to control the microorganisms within the safe range by simply using the nano silver coating film. However, pretreatment of the freeze-dried food raw materials with nano silver can better control the growth of microorganisms during the processing of freeze-dried foods. The quantity control of the final microbes in food has a certain effect.
- the method can kill the microorganisms inside the product while killing the microorganisms on the surface of the product, and does not damage the product quality due to moisture absorption or pulverization. .
- this method uses the combination of ozone and ultraviolet, which serves the dual effects of two sterilization methods, and can also overcome the problem of oxygen concentration drop during ozone killing.
- the method is used to pretreat the raw material with nano silver coating film before the production, so that the reduction of the carrier can be performed as soon as possible.
- nano-silver can also inhibit re-contamination during the production process, so that the products after production can be sterilized by ozone, which can achieve twice the result with half the effort.
- the method kills the microorganisms on the surface of the product while killing the microorganisms inside the product, and does not cause the product to deteriorate the quality of the product due to moisture absorption or pulverization.
- the method does not cause the pyrolysis of the freeze-dried food caused by the heat treatment, nor does it cause the moisture absorption and deterioration of the freeze-dried food produced by the moist heat sterilization method. It also does not produce 3 ⁇ 4 ⁇ badness of various nutrients in freeze-dried foods produced by intense sterilization methods. And the loss of flavor.
- the method is to control the quality of the freeze-dried food under the premise of preserving the quality of the freeze-dried food, and at the same time, control the freeze-dried food within the safe range of microorganisms.
- the present invention controls the microorganisms in the product within a safe range by combining the ozone, ultraviolet and nanosilver coatings with the bactericidal method as compared with the background art.
- the sterilization target is achieved through simple experimental equipment; the microbial content of the product can be safely achieved without toxic side effects and without compromising product quality.
- the water content of the product after this method will not change, the product has a flat shape, no scorching or collapse, long storage period, short processing time and low production cost, which can maintain the original color of the product to the greatest extent. , flavor and nutritional value.
- the concentration of nano silver is determined by using sterile ultrapure water. 0.045 mg/L aqueous solution of nano silver.
- the nanosilver aqueous solution used in all of the following examples can be obtained by the method of nanosilver.
- Example 1 The bactericidal treatment of freeze-dried vegetable pieces by the combined sterilization method of ozone, ultraviolet and nano silver coating
- the lyophilized mixed vegetable block produced by a company is packaged in 5g, and the nano silver coating process is added in the pretreatment process of the production, or the nano silver solution is directly used when the vegetable is blanched.
- the concentration of nano silver used in the production process is below 0.05ppm, generally 0.045ppm, soaking for 30 seconds, while stirring, so that all parts of the vegetable surface are adhered with nano silver particles, and then the vegetables are removed for subsequent lyophilization process.
- the ozone ozone sterilization experiment requires a complete finished product, and the contents do not have any moisture-absorbing and other bad changes. The contents are divided into two by the scissors that have been sterilized, and are filled into the first use.
- one seal is placed in the air as a control; the other is sealed immediately after charging the ozone gas for 3 s. Then, on the outside of the pocket, put on a first-time 18x24 sealed air bag that has been exhausted as much as possible. Seal it with ozone gas for 15 seconds.
- the transparently packaged sample bag was placed under an ultraviolet lamp, and the ultraviolet lamp power was 30-55 W, and irradiation sterilization treatment was performed for 60 minutes.
- the two bag samples were separately diluted and cultured on an aseptic table.
- the three dilution gradients selected were 1: 100, 1 : 1000, 1 : 1 0000 ⁇
- the culture of beef paste peptone medium and lactose bile salt fermentation tube was carried out in a 37 ° C incubator for 48 h and 36 h.
- the test results show that: the total number of colonies of untreated samples after culturing is between 10,000 and 100,000/g, and the total number of colonies after treatment of the treated samples is less than 1000/g; the untreated samples are cultured through fermentation tubes. After that, a large number of bubbles or even discoloration will occur, and the treated sample will not change color after being cultured in the fermentation tube, and almost no bubble is observed, that is, the coliform (or E. coli) is up to standard (negative).
- Example 2 Sterilization of freeze-dried sea cucumber by ozone, ultraviolet and nano silver coating combined sterilization
- the total number of colonies of untreated samples after culturing is between 10,000 and 100,000/g, and the total number of colonies after treatment of the treated samples is less than 1000/g; the untreated samples will be cultured after fermentation.
- a large number of bubbles appear and even discoloration, and the treated sample does not change color after being cultured in a fermentation tube, and almost no bubble is observed, that is, the coliform group (or Escherichia coli) reaches the standard (negative).
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Food Science & Technology (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Storage Of Fruits Or Vegetables (AREA)
Abstract
L'invention concerne un procédé de stérilisation associé incluant de l'ozone, un rayonnement ultraviolet et un revêtement constitué de nano-particules d'argent pour préserver la qualité d'un aliment lyophilisé. Ce procédé se compose de l'étape consistant à : prétraiter la matière première avec un revêtement de nano-particules d'argent, le produit fini étant stérilisé par de l'ozone puis stérilisé par un rayonnement ultraviolet de façon à contrôler la quantité de micro-organismes pour qu'elle ne dépasse pas 1000/g et à ce que la quantité de bacilles du gros intestin atteigne le niveau voulu.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007101344054A CN101167592B (zh) | 2007-10-19 | 2007-10-19 | 一种臭氧、紫外和纳米银涂膜对冻干食品保质的联合杀菌方法 |
CN200710134405.4 | 2007-10-19 |
Publications (1)
Publication Number | Publication Date |
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WO2009049450A1 true WO2009049450A1 (fr) | 2009-04-23 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/CN2007/003327 WO2009049450A1 (fr) | 2007-10-19 | 2007-11-23 | Procédé de stérilisation associé incluant de l'ozone, un rayonnement ultraviolet et un revêtement constitué de nano-particules d'argent pour préserver la qualité d'un aliment lyophilisé |
Country Status (2)
Country | Link |
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CN (1) | CN101167592B (fr) |
WO (1) | WO2009049450A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20100827A1 (it) * | 2010-05-10 | 2011-11-11 | Angela Bassoli | Procedimento per la conservazione e la ricopertura estetica di prodotti vegetali in genere. |
CN111011726A (zh) * | 2019-12-31 | 2020-04-17 | 长沙南泥湾食品厂 | 一种鲜湿面的减菌保鲜方法 |
CN111165556A (zh) * | 2020-02-09 | 2020-05-19 | 董锦铭 | 一种解冻肉杀菌方法及处理装置 |
Families Citing this family (10)
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WO2017175028A1 (fr) * | 2016-04-04 | 2017-10-12 | PHILIPPI, Eduardo Frederico Borsarini | Système et procédé de désodorisation, de stérilisation et d'augmentation de la résistance à la maturation dans des aliments |
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US11178890B2 (en) * | 2017-04-24 | 2021-11-23 | Clean Works Inc. | Advanced oxidative process for microbial reduction |
CN107183000A (zh) * | 2017-06-20 | 2017-09-22 | 百瑞源枸杞股份有限公司 | 一种枸杞灭菌防虫的方法 |
CN108077713A (zh) * | 2017-12-13 | 2018-05-29 | 周勇 | 一种杀菌保鲜急冻液及其制备方法 |
CN108477603B (zh) * | 2018-03-05 | 2021-06-18 | 江南大学 | 一种喷雾干燥调理麦苗粉柔性杀菌及营养组分有效保存的方法 |
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