WO2017073476A1 - Procédé de production de boisson contenant du lait - Google Patents

Procédé de production de boisson contenant du lait Download PDF

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Publication number
WO2017073476A1
WO2017073476A1 PCT/JP2016/081252 JP2016081252W WO2017073476A1 WO 2017073476 A1 WO2017073476 A1 WO 2017073476A1 JP 2016081252 W JP2016081252 W JP 2016081252W WO 2017073476 A1 WO2017073476 A1 WO 2017073476A1
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WIPO (PCT)
Prior art keywords
milk
oxygen concentration
raw
inert gas
raw milk
Prior art date
Application number
PCT/JP2016/081252
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English (en)
Japanese (ja)
Inventor
尭 長田
淳平 斎藤
Original Assignee
株式会社明治
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Filing date
Publication date
Application filed by 株式会社明治 filed Critical 株式会社明治
Priority to SG11201803326WA priority Critical patent/SG11201803326WA/en
Priority to JP2017509057A priority patent/JP6129463B1/ja
Priority to CN201680059241.0A priority patent/CN108135221A/zh
Publication of WO2017073476A1 publication Critical patent/WO2017073476A1/fr
Priority to HK18108122.4A priority patent/HK1248471A1/zh

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Classifications

    • 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
    • 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
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/38—Other non-alcoholic beverages
    • 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
    • A23C3/08—Preservation of milk or milk preparations by addition of preservatives
    • 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
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • 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
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/42—Preservation of non-alcoholic beverages

Definitions

  • the present invention relates to a method for producing a milk-containing beverage.
  • Patent Document 1 milk or an unheated liquid containing milk is replaced with an inert gas such as nitrogen gas before heat treatment, and heat treatment is performed in a state where dissolved oxygen in the liquid is reduced to 5 ppm or less.
  • an inert gas such as nitrogen gas
  • a method for producing a beverage having a flavor similar to raw milk or unheated liquid that suppresses generation of dimethyl disulfide due to heating is described.
  • Patent Document 2 describes a means for directly mixing and dispersing nitrogen gas in milk and the like, and milk and the like in which nitrogen gas is not mixed and dispersed, and nitrogen gas stored in a nitrogen gas replacement tank in a nitrogen gas atmosphere.
  • a nitrogen gas replacement tank connected to a raw material tank and a liquid supply pipe is provided, a nitrogen gas supply means is connected to the raw material tank side of the liquid supply pipe, and nitrogen gas replacement of the liquid supply pipe is performed.
  • a nitrogen gas mixing / dispersing machine is installed on the tank side, a branch liquid feeding pipe leading from the raw material tank side into the nitrogen gas replacement tank is installed on the branch gas feeding means rather than the nitrogen gas supply means connected to the liquid feeding pipe.
  • Milk or the like characterized in that a spray nozzle is connected to the tip of the liquid pipe in the nitrogen gas replacement tank, and each liquid feed pipe, nitrogen gas supply means, and branch liquid feed pipe are provided with a flow rate control device.
  • Patent Document 3 describes a method for maintaining freshness of stored raw milk, wherein nitrogen gas is passed through the stored raw milk and the raw milk is agitated. Specifically, in the case of a storage tank with a scale of 100 tons, nitrogen gas is aerated at a rate of 100 to 300 liters per minute at a pressure of about 2 to 3 kg / cm 2 and stored in a standard state for stored raw milk. Of raw milk is described.
  • the supply amount of an inert gas such as nitrogen gas mixed with the milk-containing beverage is increased. It is necessary to replace the dissolved oxygen in the contained beverage with a large amount of inert gas. However, at this time, a large amount of inert gas that is a gas is brought into contact with the milk-containing beverage that is a liquid, and thus excessive foaming is likely to occur in the milk-containing beverage.
  • the object of the present invention is to produce a milk-containing beverage having a fresh flavor, while effectively reducing the dissolved oxygen concentration of the milk-containing beverage and effectively suppressing the foaming of the milk-containing beverage generated during the production process. And it is providing the manufacturing method of a milk-containing drink whose production efficiency does not fall.
  • the present inventors have (A) Inert gas processing supply method (for example, processing using a proportional mixing device) and supply conditions (for example, the supply speed of raw milk and the supply amount of inert gas) are controlled, After the inert gas treatment is performed on the raw milk so that the bubble rate of the raw milk becomes a specific numerical value or less at the time of storage, the raw milk is discharged to reduce the dissolved oxygen concentration.
  • Inert gas processing supply method for example, processing using a proportional mixing device
  • supply conditions for example, the supply speed of raw milk and the supply amount of inert gas
  • a first oxygen concentration reduction step for obtaining milk (B) First oxygen concentration reduction by controlling the supply method (for example, processing using a proportional mixing device) and supply conditions (for example, the supply speed of raw milk and the supply amount of inert gas) of the inert gas treatment
  • the raw material milk is treated with an inert gas so that the bubble rate of the raw material milk obtained in the process (that is, the raw material milk sent after finishing the first oxygen concentration reduction step) becomes a specific numerical value or less.
  • a second oxygen concentration reduction step (C) a heat sterilization step for heat sterilizing the raw material milk obtained in the second oxygen concentration reduction step,
  • the present invention has been completed by finding that the above-described problems can be solved by the method for producing a milk-containing beverage containing
  • the present invention provides the following [1] to [5]. [1] (A) After controlling the supply method and supply conditions of the inert gas treatment, and performing the inert gas treatment on the raw milk so that the bubble rate of the raw milk is 10% or less, the above A first oxygen concentration reduction step for discharging raw milk and obtaining raw milk with reduced dissolved oxygen concentration; (B) The inert gas treatment is performed on the raw milk so that the supply method and supply conditions of the inert gas treatment are controlled and the bubble rate of the raw milk obtained in the first oxygen concentration reduction step is 10% or less.
  • a method for producing a milk-containing beverage comprising [2] The method for producing a milk-containing beverage according to [1] above, wherein raw milk of 8 ppm or less is obtained in the first oxygen concentration reduction step. [3] The method for producing a milk-containing beverage according to the above [1] or [2], wherein raw milk of 1 ppm or less is obtained in the second oxygen concentration reduction step.
  • a supply method of the inert gas treatment in each of the first oxygen concentration reduction step and the second oxygen concentration reduction step is as follows: (A) mixing raw milk and inert gas using a proportional mixing device; (B) spraying raw milk into a device (for example, a tank) having a space filled with an inert gas; (C) Mixing raw milk and inert gas using a centrifuge (separator type centrifuge), (D) mixing raw milk and inert gas using a pump; (E) Blowing inert gas into the raw milk contained in the apparatus (for example, tank) (bubbling), The method for producing a milk-containing beverage according to any one of [1] to [3], wherein the method is performed by one or a combination of two or more selected from among the above.
  • the supply method of the inert gas treatment is (a) raw milk and inert gas using a proportional mixing device, Mixing, In mixing raw material milk and inert gas using the proportional mixing device of (a), the supply rate of inert gas relative to the supply rate of supply of raw material milk (supply amount per unit time) (supply amount per unit time) ) Volume ratio (inert gas supply amount (volume) / raw milk supply amount (volume) ⁇ 100) is 5 to 70%, the method for producing a milk-containing beverage according to the above [4].
  • a milk-containing beverage having a fresh flavor with a greatly reduced dissolved oxygen concentration can be obtained.
  • the foaming of the milk-containing beverage that occurs during the production process is effectively suppressed, and the defoaming process during or after production
  • step (A) The supply method and supply conditions of the inert gas treatment are controlled, and the raw material milk is inert so that the foam rate of the raw material milk is 10% or less before and / or during the storage of the raw material milk.
  • step (A) a first oxygen concentration reduction step for discharging the raw milk and obtaining raw milk with a reduced dissolved oxygen concentration
  • step (B) The inert gas treatment is performed on the raw milk so that the supply method and supply conditions of the inert gas treatment are controlled and the bubble rate of the raw milk obtained in the first oxygen concentration reduction step is 10% or less.
  • step (B) A second oxygen concentration reduction step to obtain raw milk with reduced dissolved oxygen concentration
  • step (C) a heat sterilization step (hereinafter referred to as “step (C)”) for heat sterilizing the raw material milk obtained in the second oxygen concentration reduction step; It is a manufacturing method of the milk-containing drink containing this.
  • Step (A) controls the supply method (for example, processing using a proportional mixing device) and supply conditions (for example, the supply speed of raw milk and the supply amount of inert gas) of the inert gas treatment, Before the storage and / or during storage, the raw milk is treated with an inert gas so that the bubble rate of the raw milk is 10% or less, and then the raw milk is discharged to reduce the dissolved oxygen concentration.
  • This is a first oxygen concentration reduction step for obtaining raw milk.
  • the raw milk of the present invention refers to a milk-containing beverage before heat treatment such as unheated raw milk.
  • the raw material milk of the present invention may be in a liquid form that can be treated with an inert gas.
  • animal milk such as cow, goat, sheep milk (sheep milk), etc.
  • Processed milk products for example, skim milk, partially skim milk, skim concentrated milk, partially skim concentrated milk, ingredient-adjusted milk, cream, butter milk, etc., liquid skim milk, skim milk powder, partially skimmed milk powder, butter , Fermented milk, processed milk products reduced to cheese, etc.), plant milk such as soy milk, coconut milk, processed milk products (processed milk products reduced to liquid), artificial milk (edible oils, water, emulsifiers Etc. are mixed to obtain an oil-in-water emulsion, and a liquid milk processed product).
  • Processed milk products for example, skim milk, partially skim milk, skim concentrated milk, partially skim concentrated milk, ingredient-adjusted milk, cream, butter milk, etc., liquid skim milk, skim milk powder, partially skimmed milk powder, butter , Fermented milk, processed milk products reduced to cheese, etc.
  • plant milk such as soy milk, coconut milk, processed milk products (processed milk products reduced to liquid), artificial milk (
  • the raw milk of the present invention may contain raw materials other than milk, for example, coffee, tea, green tea, matcha tea, mate tea, fruit juice, vegetable juice, sweetener, sour agent, vitamin, mineral, function Any liquid form may be used as long as the material is added.
  • the inert gas of the present invention include nitrogen gas, argon gas, helium gas, and the like.
  • the dissolved oxygen concentration (upper limit value) of the raw material milk obtained in the first oxygen concentration reduction step of step (A) is preferably 8 ppm or less, more preferably 6 ppm or less, further preferably 4 ppm or less, more preferably 3 ppm or less. More preferably, it is 2 ppm or less. If the dissolved oxygen concentration of the raw milk obtained in the first oxygen concentration reduction step of step (A) is 8 ppm or less, the dissolved oxygen concentration of the milk-containing beverage in the second oxygen concentration reduction step of step (B) It is preferable in that the foaming of the milk-containing beverage generated during the production process can be effectively suppressed and the present invention can be easily implemented.
  • the lower limit value of the dissolved oxygen concentration of the raw material milk obtained in the first oxygen concentration reduction step of the step (A) is not particularly limited, but is preferably 0.1 ppm, more preferably 0.5 ppm, still more preferably 1. 0 ppm, more preferably 1.5 ppm.
  • the dissolved oxygen concentration of the raw material milk is 0.1 ppm or more, the dissolved oxygen concentration of the milk-containing beverage can be greatly reduced and foaming of the milk-containing beverage generated in the production process can be effectively suppressed. This is preferable because the invention can be easily implemented.
  • step (A) when the dissolved oxygen concentration of the raw material milk obtained in the first oxygen concentration reduction step of step (A) is significantly lower than 0.1 ppm, depending on the method of the inert gas treatment, the step of (A) A considerable amount of inert gas remains in the raw milk obtained in the first oxygen concentration reduction step, and foaming of the raw milk cannot be effectively suppressed due to the residual inert gas.
  • the inert gas treatment in the step (A) is not particularly limited as long as it is a method capable of obtaining a milk-containing beverage having a fresh flavor with a greatly reduced dissolved oxygen concentration, which is a feature of the present invention.
  • D mixing raw milk and inert gas using a pump;
  • E Blowing inert gas into raw milk contained in the device, It can carry out by the 1 type selected from these, or the combination of 2 or more types.
  • one kind of method selected from (a) to (e) (for example, the method (a)) can be performed once or twice or more.
  • the proportional mixing device for mixing the raw material milk and the inert gas in the above (a) is, for example, supplying the inert gas to a specific ratio (inert gas) to the raw material milk continuously supplied into the proportional mixing device.
  • Gas supply amount / raw milk supply amount so that the raw milk and the inert gas are distributed so that the distribution of the inert gas is uniform in the raw milk treated with the inert gas.
  • examples thereof include an apparatus configured to stir in-line (continuously in the pipe) (for example, a shearing apparatus such as a static mixer).
  • the proportional mixing device controls the supply conditions of the inert gas (feed amount of raw material milk and / or supply amount of inert gas) at the supply portion (inlet portion) of the proportional mixing device as necessary. it can. Further, the mixing ratio of the raw material milk and the inert gas is detected in the supply part (inlet part) and / or the discharge part (outlet part) of the proportional mixing device, and the supply part of the proportional mixing device is detected based on the detection result. , The supply conditions of the raw milk and the inert gas (the raw milk supply and / or the inert gas supply) can be controlled.
  • the apparatus for spraying raw material milk into the apparatus having the space filled with the inert gas (b) is located, for example, in the tank filled with the inert gas and at the upper part of the tank.
  • Examples include a device configured to inject and / or spray raw milk through the supply portion.
  • pouring of raw material milk is not specifically limited, For example, it can carry out through well-known piping etc.
  • spraying of raw material milk is not specifically limited, For example, it can carry out through a well-known spray nozzle, a shower ball, etc.
  • pouring of raw material milk and the direction of spraying of raw material milk are not specifically limited, For example, a horizontal direction, an upward direction, a downward direction, etc. are mentioned.
  • positioning of the supply part located in the upper part etc. of this tank is one place or two places or more.
  • the centrifuge for mixing the raw material milk and the inert gas of the above (c) is, for example, using centrifugal force, fine dust and / or components derived from animals such as dairy cows (for example, cytoplasm, For the purpose of separating skim milk and cream from raw milk, clarifier aiming to separate and remove leukocytes, etc., bactofuge aiming to separate and remove microorganisms using centrifugal force And a separator type centrifuge such as a cream separator.
  • the raw material milk and the inert gas are continuously supplied into the rotating storage container installed inside the centrifuge and the inert gas treatment is performed by mixing them. Can do.
  • the method for mixing raw milk and inert gas using the centrifuge of (c) is, for example, raw milk in which part of dissolved oxygen is replaced with inert gas by blowing inert gas or the like Is supplied to a centrifuge in which the inside of the apparatus is filled with an inert gas, and the dissolved oxygen concentration of the raw milk is reduced while processing in the same manner as described above, and the dissolved oxygen is replaced with the inert gas.
  • the method for mixing raw material milk and inert gas using the pump of (d) is, for example, by continuously supplying raw material milk and inert gas and passing through the pump,
  • the method of reducing the dissolved oxygen concentration of raw material milk by stirring and mixing by is mentioned.
  • examples of the pump (d) for mixing the raw material milk and the inert gas include non-volumetric pumps such as a centrifugal pump, a mixed flow pump, and a friction pump.
  • the concrete method for mixing raw material milk and inert gas using the pump of said (d) is, for example, a stirring blade (impeller) rotating inside a stationary pump such as a spiral pump. ) To reduce the dissolved oxygen concentration of the raw milk by stirring and mixing the raw milk and the inert gas.
  • the superficial speed of the raw material milk supplied to the proportional mixing device is preferably 0.5 to 2.5 m / sec. Preferably, it is 0.7 to 2.3 m / sec, more preferably 0.8 to 2.1 m / sec, and further preferably 1 to 2 m / sec.
  • the superficial speed of the raw material milk supplied to the proportional mixing device is 0.5 m / second or more because the dissolved oxygen concentration of the raw material milk can be greatly reduced.
  • the superficial speed of the raw milk supplied to the proportional mixing device is 2.5 m / sec or less because foaming of the raw milk generated during the production process can be effectively suppressed.
  • the superficial velocity is a linear velocity obtained by dividing the liquid processing flow rate by the cross-sectional area of the pipe, as shown in the following equation.
  • [Superficial velocity (m / s)] [Processing flow rate of liquid (m 3 / s)] ⁇ [Cross sectional area of pipe (m 2 )] (In the formula, the sectional area of the pipe means the sectional area of the space portion through which the liquid flows, and does not include the sectional area of the elements of the static mixer.)
  • the supply rate of inert gas (supply amount per unit time) relative to the supply rate of raw material milk (supply amount per unit time) Is preferably 5 to 70%, more preferably 10 to 60%, and even more preferably 20 to 60%.
  • (Volume ratio of inert gas (volume) / feed amount of raw material milk (volume) ⁇ 100) is there.
  • the volume ratio of the inert gas supply rate to the raw material milk supply rate is 5% or more because the dissolved oxygen concentration of the raw material milk can be greatly reduced.
  • the volume ratio of the inert gas supply rate to the raw material supply rate be 70% or less because foaming of the raw material milk generated in the production process can be effectively suppressed.
  • Examples of the method of mixing two or more kinds of raw material milks having different degrees of foaming include the following series of methods.
  • L / h means liter / hour
  • L / min means liter / minute.
  • the oxygen concentration (upper limit value) in the tank filled with the inert gas is preferably 10 % Or less, more preferably 8% or less, and further preferably 7% or less.
  • the oxygen concentration in the tank filled with the inert gas is 10% or less because the dissolved oxygen concentration of the raw milk can be greatly reduced.
  • the lower limit value of the oxygen concentration in the tank filled with the inert gas is particularly Although not limited, it is preferably 0%, more preferably 0.1%, still more preferably 0.5%.
  • the raw milk is treated with the inert gas in advance, so that the foaming of the raw milk itself is hardly lost. It was a common technical knowledge that the foaming of the whole raw milk generated during the manufacturing process could not be effectively suppressed.
  • the raw milk is treated with an inert gas to reduce the dissolved oxygen concentration of the raw milk, and then the inert gas of (b) is used.
  • the inert gas of (b) By spraying raw milk into a device that has a filled space, it was possible to effectively suppress foaming of the whole raw milk that occurred during the manufacturing process, while greatly reducing the dissolved oxygen concentration of the raw milk It is.
  • Dissolved oxygen concentration (upper limit value) of raw milk in which raw oxygen is sprayed into the apparatus having a space filled with the inert gas (b) and the dissolved oxygen concentration is reduced in advance by treatment with an inert gas Is preferably 10 ppm or less, more preferably 8 ppm or less, further preferably 6 ppm or less, further preferably 4 ppm or less, and further preferably 2 ppm or less.
  • the dissolved oxygen concentration of the raw material milk is 10 ppm or less, in which the dissolved oxygen concentration is reduced by treating with an inert gas in advance.
  • the dissolved oxygen concentration of raw material milk can be reduced greatly, and it is preferable at the point which can implement this invention easily.
  • the lower limit of the dissolved oxygen concentration of the raw milk in which the dissolved oxygen concentration is reduced in advance by, for example, inert gas treatment in the spraying of the raw milk into the apparatus having the space filled with the inert gas of (b).
  • a value is not specifically limited, Preferably it is 0.1 ppm, More preferably, it is 0.5 ppm, More preferably, it is 1.0 ppm, More preferably, it is 1.5 ppm.
  • the dissolved oxygen concentration of the raw material milk is 0.1 ppm or more, it is possible to effectively suppress foaming of the raw material milk generated during the production process while greatly reducing the dissolved oxygen concentration of the raw material milk. This is preferable because it can be easily implemented.
  • an apparatus for spraying raw material milk in which the dissolved oxygen concentration is reduced by treating with an inert gas in advance for example, a device obtained by improving the nitrogen gas replacement device described in Japanese Patent Application Laid-Open No. 2001-078665 (the above-mentioned Patent Document 2), in which the dissolved oxygen concentration in the raw milk is reduced,
  • the raw material milk sprayed from above into the nitrogen gas replacement device can be preliminarily treated with an inert gas by a proportional mixing device for mixing milk and an inert gas.
  • nitrogen gas is directly mixed and dispersed in raw material milk, and raw material milk in which nitrogen gas is directly mixed and dispersed in advance is injected into a tank having an atmosphere of nitrogen gas and stored (supplied).
  • the raw material milk in which nitrogen gas is directly mixed and dispersed in advance is sprayed from above with a nozzle in a tank having an atmosphere of nitrogen gas, and these raw material milks are mixed to dissolve dissolved oxygen and nitrogen in the raw material milk. It is an apparatus that can reduce the amount of dissolved oxygen (dissolved oxygen concentration) of raw milk by replacing with gas.
  • the raw material sprayed from above into the nitrogen gas replacement device With the proportional mixing device for mixing raw milk and inert gas of (a) above with milk, the inert gas treatment or the like was injected into the tank and stored (supplied). In the raw milk to be defoamed, bubbles will be generated, and it is considered that foaming of the whole raw milk generated during the manufacturing process cannot be effectively suppressed. It was common knowledge that the inert gas treatment was not performed in advance.
  • the raw material milk sprayed from above into the nitrogen gas replacement device is preliminarily treated with an inert gas so that the dissolved oxygen concentration of the raw material milk is reduced. While greatly reducing, the foaming of the whole raw milk generated during the production process could be effectively suppressed.
  • the raw milk in which some dissolved oxygen is replaced with inert gas by blowing inert gas, etc. Supplying the centrifuge filled with inert gas to reduce the dissolved oxygen concentration in the raw milk, and the raw milk in which the dissolved oxygen is not replaced with the inert gas, the inside of the equipment is inert gas Any one of the methods for reducing the dissolved oxygen concentration of the raw milk can be used, or both of them can be used in combination.
  • the raw milk in which some dissolved oxygen is replaced with inert gas by blowing inert gas, etc. is supplied to a centrifuge in which the inside of the device is filled with inert gas, and general operations are performed.
  • the inert gas inert gas used before processing in the centrifuge
  • the volume ratio of the supply speed (supply amount per unit time) is preferably 10 to 200%, more preferably 30 to 180%. More preferably, it is 50 to 150%.
  • the volume ratio of the supply rate of the inert gas to the supply rate of the raw material milk is 10% or more because the dissolved oxygen concentration of the raw material milk can be greatly reduced.
  • the volume ratio of the inert gas supply rate to the raw material supply rate be 200% or less because foaming of the entire raw material milk generated during the production process can be effectively suppressed.
  • raw milk in which dissolved oxygen is not replaced with inert gas is supplied to a centrifuge in which the inside of the equipment is filled with inert gas, and processed in the same manner as general operating conditions.
  • the oxygen concentration (upper limit value) inside the centrifuge is preferably 10% or less, more preferably 8% or less, and even more preferably 7% or less.
  • the oxygen concentration inside the centrifuge is 10% or less because the dissolved oxygen concentration in the raw milk can be greatly reduced.
  • the lower limit value of the oxygen concentration inside the centrifuge is not particularly limited, but is preferably 0%, more preferably 0.1%, and still more preferably 0.5%.
  • the ratio (supply amount of inert gas / supply amount of raw material milk) is preferably 3 to 50%, more preferably 4 to 40%, and still more preferably 5 to 30%.
  • the volume ratio of the supply rate of the inert gas to the supply rate of the raw material milk is 3% or more because the dissolved oxygen concentration of the raw material milk can be greatly reduced.
  • the volume ratio of the supply rate of the inert gas to the supply rate of the raw material milk is 50% or less because foaming of the raw material milk generated in the production process can be effectively suppressed.
  • the volume of the space in the tank (the tank when the raw material milk is not stored in the space in the tank) in the blowing (bubbling) of the inert gas into the raw material milk stored (stored) in the tank of (e) above
  • the volume ratio (volume of raw milk stored / volume of space in tank ⁇ 100) of the stored amount (volume) of raw material milk to the total volume) is preferably 20 to 90%, more preferably 30 to 80 %, More preferably 40 to 70%.
  • the volume ratio of the liquid storage amount of the raw material milk to the volume of the space in the tank is 20% or more because foaming of the raw material milk generated in the production process can be effectively suppressed.
  • the volume ratio of the liquid storage amount of the raw milk to the volume of the space in the tank is 90% or less because the dissolved oxygen concentration of the raw milk can be greatly reduced.
  • the dissolved oxygen concentration of the raw material milk is greatly reduced. The foaming of the whole raw material milk generated during the production process can be effectively suppressed, which is preferable.
  • a known bubble dispersing device can be used, for example, a sintered metal element, a filter, a sparger, a narrow flow A road nozzle or the like can be used.
  • the supply rate of inert gas (supply per unit time) relative to the supply rate (supply amount per unit time) of the raw material milk to the tank Volume ratio (feed rate of inert gas / feed rate of raw material milk ⁇ 100) is preferably 10 to 100%, more preferably 20 to 90%, and still more preferably 30 to 80%.
  • the volume ratio of the supply rate of the inert gas to the stored amount of raw material milk is 20% or more because the dissolved oxygen concentration of the raw material milk can be greatly reduced.
  • the volume ratio of the supply rate of the inert gas to the liquid storage amount of the raw milk is 100% or less because foaming of the raw milk generated during the production process can be effectively suppressed.
  • the amount of the inert gas blown relative to the amount of raw material milk stored (unit volume: 1 liter) (supply amount per unit time: liter) / Min) is preferably 0.005 to 0.1 liter / minute, more preferably 0.006 to 0.08 liter / minute, further preferably 0.008 to 0.05 liter / minute, and more preferably 0. 0.01 to 0.03 liter / minute, more preferably 0.015 to 0.025 liter / minute.
  • the amount of the inert gas blown to the stored amount of raw material milk is 0.005 liter / min ⁇ or more because the dissolved oxygen concentration of the raw material milk can be greatly reduced.
  • the amount of the inert gas blown relative to the amount of raw material milk stored is 0.1 liter / min ⁇ or less because foaming of the raw material milk generated during the production process can be effectively suppressed.
  • the raw material milk can be defoamed.
  • the defoaming process of raw material milk can be performed.
  • the raw material milk obtained in the first oxygen concentration reduction step of step (A) is injected into a (small) tank installed after the first oxygen concentration reduction step of step (A).
  • the raw milk obtained in the first oxygen concentration reduction step of step (A) can be defoamed.
  • gas for example, Inert gas such as nitrogen gas
  • the raw milk can be defoamed.
  • the raw material milk obtained in the first oxygen concentration reduction step of step (A) is allowed to stand for a predetermined time, and the raw material milk obtained in the first oxygen concentration reduction step of step (A)
  • the raw milk obtained in the first oxygen concentration reduction step of the step (A), the raw material milk obtained in the first oxygen concentration reduction step of the step (A), the raw material obtained in the first oxygen concentration reduction step of the step (A) By depressurizing milk with a known tank or pipe, blending (adding) an antifoaming agent or the like into the raw milk obtained in the first oxygen concentration reduction step of step (A), etc.
  • the raw milk obtained in the first oxygen concentration reduction step can be defoamed.
  • the inert gas treatment (a) (mixing of raw milk and inert gas using a proportional mixing device) is preferable.
  • the degree of foaming of the raw material milk obtained in the first oxygen concentration reduction step of step (A) can be evaluated using the bubble rate as an index.
  • the bubble rate of the raw material milk is preferably 10% or less, more preferably 8% or less, further preferably 6% or less, and further preferably 5% or less.
  • the foam rate of the raw material milk is 10% or less, the foaming of the raw material milk is not excessively generated, and the foaming of the raw material milk is effectively suppressed. Defoaming treatment or the like can be simplified or omitted, which is preferable.
  • the raw material milk with excessive foaming is indirectly heat sterilized with a plate-type heat sterilizer, etc.
  • the components derived from the raw material milk may be attached or burnt on the inner surface (plate, piping, etc.) of the plate-type heat sterilizer. It tends to occur.
  • the thermal conductivity is lowered, and in order to maintain the temperature of heat sterilization at a predetermined temperature, a medium (hot water, It is necessary to increase the temperature of the water vapor or the like, or increase the amount of medium used to heat the raw milk.
  • the bubble rate of the raw milk is a volume ratio obtained by dividing the volume of the bubbles by the total volume of the raw milk as shown in the following formula.
  • Rubber ratio of raw milk (unit: volume%)] [bubble volume (m 3 )] ⁇ 100 ⁇ [total volume of raw milk containing bubbles (m 3 )]
  • [Bubble ratio of raw milk (unit: volume%)] [height of bubble phase (m)] ⁇ 100 ⁇ ([height of bubble phase (m)] + [height of liquid phase (m)])
  • the raw material milk obtained in the step (A) (first oxygen concentration reduction step) can be stored.
  • Raw material milk obtained in one oxygen concentration reduction step can be stored.
  • the step (B) (second oxygen concentration reduction step) immediately before the step (C) (heat sterilization step)
  • the step (A) first oxygen concentration reduction step.
  • the raw material milk obtained in the step (A) (first oxygen concentration reduction step) is made to stand by and the raw material milk obtained in the step (A) (first oxygen concentration reduction step) is stored. To do.
  • in an inert gas atmosphere for example, in a nitrogen gas atmosphere
  • the step (A) first oxygen concentration
  • the purpose of the present invention is to appropriately determine the conditions of the inert gas treatment in the step (B) (second oxygen concentration reduction step). A milk-containing beverage can be obtained.
  • Step (B): Second oxygen concentration reduction step The step (B) controls the supply method of inert gas treatment (for example, treatment using a proportional mixing device) and supply conditions (for example, the feed rate of raw milk and the amount of supply of inert gas), and the step (A ) (2) to obtain a raw material milk having a reduced dissolved oxygen concentration by subjecting the raw material milk to an inert gas treatment so that the bubble rate of the raw material milk obtained in the first oxygen concentration reduction step is 10% or less.
  • the dissolved oxygen concentration of the raw material milk obtained in the step (B) is preferably 1 ppm or less, more preferably 0.8 ppm or less, more preferably from the viewpoint of maintaining the fresh flavor of the milk-containing beverage over a long period of time.
  • it is 0.6 ppm or less, More preferably, it is 0.5 ppm or less, More preferably, it is 0.4 ppm or less, More preferably, it is 0.3 ppm or less, More preferably, it is 0.2 ppm or less.
  • the lower limit of the dissolved oxygen concentration of the raw material milk obtained at the process (B) is not specifically limited, Preferably it is 0.01 ppm, More preferably, it is 0.03 ppm, More preferably, it is 0.05 ppm.
  • the dissolved oxygen concentration of the raw material milk is 0.01 ppm or more, it is possible to effectively suppress foaming of the raw material milk generated during the manufacturing process while greatly reducing the dissolved oxygen concentration of the raw material milk. This is preferable because it can be easily implemented.
  • the dissolved oxygen concentration of the raw material milk is significantly lower than 0.01 ppm, a small amount of inert gas remains in the raw material milk obtained in the step (B) by the inert gas treatment method. When the inert gas remains, foaming of the milk-containing beverage cannot be effectively suppressed.
  • the inert gas treatment is performed so that the dissolved oxygen concentration of the raw material milk obtained in the step (B) is smaller than the dissolved oxygen concentration of the raw material milk obtained in the step (A). It is not necessary to excessively increase the supply amount of the inert gas, and while reducing the dissolved oxygen concentration of the raw material milk supplied to the step (C), the foaming of the raw material milk generated during the production process is effective. It is preferable in that it can be suppressed and the present invention can be easily implemented.
  • the difference between the dissolved oxygen concentration of the raw material milk obtained in step (A) and the dissolved oxygen concentration of the raw material milk obtained in step (B) is It is preferably 0.5 to 7.8 ppm, more preferably 0.6 to 5.6 ppm, still more preferably 0.8 to 3.6 ppm, and still more preferably 1.0 to 3.2 ppm.
  • the difference in dissolved oxygen concentration of the raw material milk is 0.5 ppm or more, it is possible to effectively suppress foaming of the raw material milk generated during the production process while greatly reducing the dissolved oxygen concentration of the raw material milk. This is preferable because the invention can be easily implemented.
  • the reason for adopting the method of reducing the dissolved oxygen concentration of the raw material milk by the two-stage inert gas treatment of the step (A) and the step (B) is as follows.
  • the step (A) first oxygen By going through the (concentration reduction step)
  • the raw milk and inert gas can be easily adapted, and after that, it can be processed stably and efficiently in step (B) (second oxygen concentration reduction step). It has a characteristic.
  • step (A) first oxygen concentration reduction step
  • step (B) second oxygen concentration reduction step
  • step (A) first oxygen concentration reduction step
  • step (B) second oxygen concentration reduction step
  • the liquid raw material Since there is no need to bring a large amount of gaseous inert gas into contact with milk, and there is no need to install or operate (operate) large-scale equipment, it is possible to suppress equipment costs and manufacturing costs associated therewith. . And finally, it is preferable because generation of excessive foaming can be suppressed in the milk-containing beverage obtained in the step (B) and / or the step (C).
  • the inert gas treatment in the step (B) is performed in the same manner as in the step (A), for example, (A) mixing raw milk and inert gas using a proportional mixing device; (B) spraying raw milk into a device having a space filled with an inert gas; (C) mixing raw milk and inert gas using a centrifuge, (D) mixing raw milk and inert gas using a pump; (E) Blowing inert gas into raw milk contained in the device, It can carry out by the 1 type selected from these, or the combination of 2 or more types.
  • one kind of method selected from (a) to (e) (for example, the method (a)) can be performed once or twice or more.
  • the combination of the methods (a) to (e) in the step (A) and the methods (a) to (e) in the step (B) is not particularly limited.
  • any one of the above (a) to (e) or two or more methods are arbitrarily adopted, and in step (B), any one of (a) to (e) above or Two or more methods can be arbitrarily adopted.
  • the inert gas By adjusting the supply time and the supply amount of the inert gas, the dissolved oxygen concentration of the milk-containing beverage can be easily reduced, the supply rate of the inert gas (the supply amount per unit time) (for example, the unit volume of raw milk (1 By adjusting the amount from 0.005 to 0.1 liters per minute), it is possible to sufficiently suppress foaming, and by improving only the liquid storage tank (surge tank) after sterilization of raw milk and its surroundings This is preferable because it can be realized by effectively improving the equipment in a space-saving manner.
  • the supply amount per unit time for example, the unit volume of raw milk (1 By adjusting the amount from 0.005 to 0.1 liters per minute
  • the method (a) in the method (a) (mixing raw material milk and inert gas using a proportional mixing device), supply of inert gas It is preferable because the dissolved oxygen concentration of the milk-containing beverage can be easily reduced by adjusting the time and the supply amount of the inert gas, and foaming can be suppressed by adjusting the supply rate of the inert gas.
  • the method of carrying out a defoaming process after a process (C) and / or a process (C), and this detail are the same as that of the method of carrying out a defoaming process at a process (A).
  • the bubble rate can be used as an index in the same manner as the degree of foaming of the raw material milk obtained in the step (A).
  • the foam ratio of the raw material milk obtained in the step (B) is preferably 10% or less, more preferably 8% or less, further preferably 6% or less, and further preferably 5% or less.
  • the foam rate of the raw milk is 10% or less, while effectively suppressing the foaming of the milk-containing beverage generated in the production process and reducing the production efficiency.
  • the foam ratio of the raw milk exceeds 10%, the raw milk is excessively foamed, and subsequent defoaming or defoaming is required, or the raw milk with excessive foaming is heated by the plate type.
  • indirect heat sterilization is performed with a sterilizer or the like, scorching due to foaming is likely to occur on the inner surface of the plate or the like, and this scoring causes a decrease in thermal conductivity during heating. Therefore, in order to heat the raw milk to a constant temperature, the heating medium must be set to a higher temperature than usual, and the plate must be washed and replaced more frequently than usual, which increases production efficiency. There may be a problem such as a decrease or an increase in manufacturing cost due to equipment renewal.
  • a known oxygen concentration reduction treatment other than the inert gas treatment can be applied to the oxygen concentration reduction step corresponding to the step (A) and the step (B) of the present invention, for example, a vacuum degassing (vacuum degassing) treatment.
  • a membrane deaeration process a gas separation membrane such as a hollow fiber membrane
  • foaming of the raw material milk is less likely to occur than the inert gas process, and the raw material milk is indirectly heated and sterilized with a plate-type heat sterilizer or the like.
  • Step (C) is a heat sterilization step in which the raw milk obtained in step (B) (second oxygen concentration reduction step) is heat sterilized.
  • the heat sterilization method is not particularly limited as long as it is a heat sterilization method usually used in the production of milk.
  • a low temperature long time sterilization method of treating at 61 to 65 ° C. for 30 to 60 minutes, 70 to 75 examples thereof include a high-temperature short-time sterilization method in which treatment is performed at 15 ° C. for 15 to 60 seconds, and an ultra-high temperature sterilization method in which treatment is performed at 130 to 150 ° C. for 1 to 5 seconds.
  • the temperature and time of heat sterilization can be appropriately adjusted as long as a predetermined level of hygiene is maintained and the quality of the milk-containing beverage is maintained.
  • the dissolved oxygen concentration of the milk-containing beverage obtained in the step (C) is preferably 1 ppm or less, more preferably 0.8 ppm or less, from the viewpoint of maintaining the fresh flavor of the milk-containing beverage over a long period of time. More preferably, it is 0.6 ppm or less, more preferably 0.5 ppm or less, further preferably 0.4 ppm or less, further preferably 0.3 ppm or less, and particularly preferably 0.2 ppm or less.
  • the step (C) is performed.
  • the lower limit value of the dissolved oxygen concentration of the milk-containing beverage obtained in the step (C) is not particularly limited, but is preferably 0.01 ppm, more preferably 0.03 ppm, still more preferably 0.05 ppm, still more preferably 0.00. 1 ppm.
  • the dissolved oxygen concentration of the milk-containing beverage is 0.01 ppm or more, while greatly reducing the dissolved oxygen concentration of the milk-containing beverage, it is possible to effectively suppress foaming of the milk-containing beverage generated in the production process, This is preferable in that the present invention can be easily implemented.
  • milk-containing beverages examples include milk, milk beverages containing milk, animal milk other than cows, milk beverages containing animal milk other than cows, vegetable beverages such as soy milk, artificial milk, beverages containing artificial milk, and the like.
  • raw materials other than raw milk can be added before heat sterilization, during heat sterilization, or after heat sterilization.
  • step (C) if necessary, replace the internal space of the tank (surge tank, filler tank, etc.) before storing the milk-containing beverage in the tank with inert gas, and store the milk-containing beverage in the tank.
  • replacing the internal space (head space) of the tank with inert gas replacing the internal space of the container before filling the tank with milk-containing beverage with inert gas, filling the container with milk-containing beverage
  • the inner space (head space) of the container after the replacement can be replaced with an inert gas, and an oxygen scavenger can be applied to the inner surface of the tank and / or the container.
  • any one of the following treatments (i) to (iv) or a combination of two or more thereof can be performed.
  • the following treatments (i) to (iv) can be carried out as step (A) and / or step (B), and the following treatments (i) to (iv) are carried out as steps (A) and / or It can also be performed as a new process different from the process (B).
  • the 2nd process which puts the milk-containing drink after a 1st process in a pressure-reduced atmosphere can be performed. By this treatment, the dissolved oxygen concentration of the milk-containing beverage can be further reduced.
  • step (Ii) After storing the milk-containing beverage in a storage tank or the like, the inside of the storage tank can be depressurized, and the dissolved oxygen contained in the milk-containing beverage can be released into the internal space of the storage tank. By this treatment, the dissolved oxygen concentration of the milk-containing beverage can be further reduced.
  • step (C) After the inert gas of the milk-containing beverage is blown and the dissolved oxygen concentration of the milk-containing beverage is reduced, bubbles formed in the milk-containing beverage can be broken using a decompression pump or the like. . By this treatment, the dissolved oxygen concentration of the milk-containing beverage can be further reduced.
  • step (C) an inert gas can be blown into the milk-containing beverage stored in a tank (such as a surge tank or a filler tank). By this treatment, the dissolved oxygen concentration of the milk-containing beverage can be further reduced.
  • a milk-containing beverage can be filled (contained) in a container and stored in a refrigerator or at room temperature as a milk-containing beverage in a container.
  • a container having low oxygen permeability for example, a bottle, a steel can, an aluminum can, PET (polyethylene terephthalate), vinyl A container made of nylon or the like is preferable.
  • a milk-containing beverage when filled in a paper container, for example, as compared with a normal milk paper container, such as a container formed by a laminated sheet including a paper base material layer and a nylon resin layer.
  • a paper container having low oxygen permeability As a laminated sheet constituting a paper container, for example, a laminated sheet in which a polyethylene layer, a paper base layer, a nylon resin layer, an adhesive layer, a polyethylene layer are laminated in this order from the outside to the inside of the container Is mentioned.
  • the resin forming the nylon resin layer include various nylons (polyamide resins) such as nylon MXD6, nylon 6, nylon 6,6, nylon 4,6, and the like.
  • the present invention by reducing the dissolved oxygen concentration of the milk-containing beverage, for example, the occurrence of abnormal flavor associated with heating and / or storage that occurs in milk that tends to change flavor due to oxygen and / or heating is reduced.
  • the abnormal flavor here is, for example, a spontaneous oxidation odor called bean odor, a heating odor, or the like.
  • carbonyl compounds such as hexanal are known as causative substances of spontaneous oxidation odor
  • sulfur compounds such as dimethyl sulfide, dimethyl disulfide and dimethyl trisulfide are known as causative substances of heating odor
  • the milk-containing beverage of the present invention is Moreover, generation
  • the present invention After controlling the supply method and supply conditions of the inert gas treatment and performing the inert gas treatment on the raw milk so that the foam rate of the raw milk is 10% or less, the raw milk is A first oxygen concentration reduction step for discharging and obtaining raw milk with reduced dissolved oxygen concentration; (B) The inert gas treatment is performed on the raw milk so that the supply method and supply conditions of the inert gas treatment are controlled and the bubble rate of the raw milk obtained in the first oxygen concentration reduction step is 10% or less.
  • a second oxygen concentration reduction step for obtaining raw milk with reduced dissolved oxygen concentration (C) a heat sterilization step for heat sterilizing the raw milk obtained in the second oxygen concentration reduction step, It is also a manufacturing method of the milk-containing drink which reduced generation
  • the present invention (A) After controlling the supply method and supply conditions of the inert gas treatment and performing the inert gas treatment on the raw milk so that the foam rate of the raw milk is 10% or less, the raw milk is A first oxygen concentration reduction step for discharging and obtaining raw milk with reduced dissolved oxygen concentration; (B) The inert gas treatment is performed on the raw milk so that the supply method and supply conditions of the inert gas treatment are controlled and the bubble rate of the raw milk obtained in the first oxygen concentration reduction step is 10% or less.
  • a second oxygen concentration reduction step for obtaining raw milk with reduced dissolved oxygen concentration (C) a heat sterilization step for heat sterilizing the raw milk obtained in the second oxygen concentration reduction step, It is also a method for reducing the dissolved oxygen concentration in a milk-containing beverage containing
  • the present invention also provides: (A) After controlling the supply method and supply conditions of the inert gas treatment and performing the inert gas treatment on the raw milk so that the foam rate of the raw milk is 10% or less, the raw milk is A first oxygen concentration reduction step for discharging and obtaining raw milk with reduced dissolved oxygen concentration; (B) The inert gas treatment is performed on the raw milk so that the supply method and supply conditions of the inert gas treatment are controlled and the bubble rate of the raw milk obtained in the first oxygen concentration reduction step is 10% or less.
  • a second oxygen concentration reduction step for obtaining raw milk with reduced dissolved oxygen concentration (C) a heat sterilization step for heat sterilizing the raw milk obtained in the second oxygen concentration reduction step, It is also a method for reducing the occurrence of an abnormal flavor associated with heating and / or storage of a milk-containing beverage containing.
  • the present invention also provides: (A) a first oxygen concentration reduction step of controlling the supply method and supply conditions of the inert gas treatment and performing the inert gas treatment on the raw material milk; (B) a heat sterilization step for heat sterilizing the raw milk obtained in the first oxygen concentration reduction step; (C) The supply method and supply conditions of the inert gas treatment are controlled, the raw milk obtained after the heat sterilization process is subjected to the inert gas treatment, and the milk-containing beverage whose dissolved oxygen concentration is 1 ppm or less A second oxygen concentration reduction step to obtain an oxygen concentration reduction step; It is also a method for reducing the generation of spontaneous oxidation odor and / or heating odor of milk-containing beverages containing sucrose.
  • the present invention also provides: (A) a first oxygen concentration reduction step of controlling the supply method and supply conditions of the inert gas treatment and performing the inert gas treatment on the raw material milk; (B) a heat sterilization step for heat sterilizing the raw milk obtained in the first oxygen concentration reduction step; (C) The supply method and supply conditions of the inert gas treatment are controlled, the raw milk obtained after the heat sterilization process is subjected to the inert gas treatment, and the milk-containing beverage whose dissolved oxygen concentration is 1 ppm or less A second oxygen concentration reduction step to obtain an oxygen concentration reduction step; It is also a method for reducing the generation of carbonyl compounds (such as hexanal) and / or sulfur compounds (such as dimethyl sulfide, dimethyl disulfide, and dimethyl trisulfide) in milk-containing beverages that contain.
  • carbonyl compounds such as hexanal
  • sulfur compounds such as dimethyl sulfide, dimethyl disulfide, and dimethyl trisulfide
  • L / h means liter / hour
  • L / min means liter / minute
  • the bubble rate of raw milk was determined by pouring raw milk (or pasteurized milk) into a transparent glass graduated cylinder (1L volume) and holding it for 5 minutes, and then poured into the graduated cylinder. In (or pasteurized milk), the height of the liquid phase in the lower layer and the height of the bubble phase in the upper layer were measured with a ruler and calculated by the following formula.
  • [Bubble ratio of raw milk] (unit: volume%) [height of foam phase (m)] ⁇ 100 ⁇ ([height of foam phase (m)] + [height of liquid phase (m)])
  • Example 1 A nitrogen gas displacement device described in Japanese Patent Application Laid-Open No. 2001-077865 (the above Patent Document 2) is provided with a static mixer (inner diameter: 8 mm, 63 elements) (proportional mixing device for mixing and dispersing nitrogen gas)
  • a static mixer inner diameter: 8 mm, 63 elements
  • proportional mixing device for mixing and dispersing nitrogen gas In the following examples and comparative examples, raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 12.7 ppm, specific gravity) is used.
  • the raw milk is temporarily stored in a milk storage tank (100 L capacity), and then passed through the nitrogen gas replacement device again at 150 L / h (superficial velocity: 0.8 m / sec). While being liquid, nitrogen gas was blown in and proportionally aerated (mixed) at 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.1 ppm
  • the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 1.5 ppm.
  • raw milk was passed through a plate-type heat sterilizer (abbreviated as “sterilizer” in the following examples and comparative examples) (heat sterilization conditions: 130 ° C., 2 seconds) at 150 L / h.
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.3 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product) (immediately after the end of the step (C)).
  • Example 2 Raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 13.1 ppm, specific gravity: 1.03): 5, with a static mixer (inner diameter: 47.8 mm, 18 elements) installed in a proportional mixing device While passing 000 L through 5000 L / h (superficial velocity: 0.8 m / sec), nitrogen gas was blown in and aeration was performed at a rate of 37.5 L / min (volume ratio of nitrogen gas / raw milk: 45%) ( Mixed). In addition, the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 12.7 ppm. Thereafter, raw milk was temporarily passed through a defoaming tank (200 L capacity).
  • a spray nozzle (Spraying Systems Co., Ltd .; product name: Fulljet 22) is installed above the defoaming tank, and a portion of the raw milk that has passed through the defoaming tank is removed. Branched to the spray nozzle at the top of the foam tank and sprayed onto the liquid surface at a flow rate of 500 L / h with a back pressure of 0.07 MPa to eliminate the bubbles and store the tank (20,000 L capacity) ) was passed through (immediately after the end of step (A)).
  • the raw milk after mixing this nitrogen gas had a dissolved oxygen concentration of 2.1 ppm and a bubble rate of 5% or less.
  • raw milk is temporarily stored in a milk storage tank (20,000 L capacity), and then the raw milk is again supplied to the nitrogen gas replacement device at 5000 L / h (superficial velocity: 0.8 m / second).
  • nitrogen gas was blown in and aerated (mixed) at a rate of 50 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.2 ppm, and the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 2.1 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 10,000 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.4 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 3 After filling the inside of a nitrogen replacement tank (50 L capacity) with a spray nozzle (Spraying Systems Co., Ltd .; product name: Fulljet 1.5) at the top with nitrogen gas, raw milk (raw material) is placed in the nitrogen replacement tank. Milk, temperature: 10 ° C. or less, dissolved oxygen concentration: 11 ppm, specific gravity: 1.03): The entire amount was sprayed from the spray nozzle to the nitrogen replacement tank while passing 20 L at 90 L / h ( Immediately after the end of step (A)). In the raw milk after mixing this nitrogen gas, the dissolved oxygen concentration was 2.0 ppm and the bubble rate was 10% or less.
  • nitrogen gas was blown into the nitrogen gas replacement device at 150 L / h (empty speed: 0.8 m / sec) while blowing nitrogen gas to 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) was aerated (mixed) proportionally (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.1 ppm, and the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 2.0 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.4 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 4 Nitrogen gas was supplied at a rate of 10 L / min to the inside (around the bowl) of the clarifier (Westphalia Separator, trade name SA-1), which is a separator-type centrifuge, and the oxygen concentration was adjusted to 4%. Later, raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 14.7 ppm, specific gravity: 1.03): 30 L was passed through the clarifier (back pressure: 0 MPa) at 100 L / h ( Immediately after the end of step (A)). In the raw milk after mixing this nitrogen gas, the dissolved oxygen concentration was 2.8 ppm, and the bubble rate was 10% or less.
  • SA-1 Westphalia Separator
  • the raw milk is temporarily stored in a storage tank (100 L capacity) and then passed through the nitrogen gas replacement device at a rate of 150 L / h (superficial velocity: 0.8 m / sec). Then, nitrogen gas was blown in and aerated (mixed) at a rate of 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 2.8 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.6 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 5 Passing raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 14.7 ppm, specific gravity: 1.03): 30 L at 150 L / h (superficial velocity: 0.8 m / sec) through a nitrogen gas replacement device While being liquid, nitrogen gas was blown in and aerated (mixed) in proportion to 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%).
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 14.7 ppm.
  • raw milk was passed through a clarifier (Westphalia Separator Co., Ltd., trade name: SA-1, back pressure: 0 MPa) which is a separator type centrifuge (immediately after the end of the step (A)).
  • SA-1 Westphalia Separator Co., Ltd., trade name: SA-1, back pressure: 0 MPa
  • the raw milk after mixing this nitrogen gas had a dissolved oxygen concentration of 2.1 ppm and a bubble rate of 10% or less.
  • the raw milk is temporarily stored in a storage tank (100 L capacity) and then passed through the nitrogen gas replacement device at a rate of 150 L / h (superficial velocity: 0.8 m / sec). Then, nitrogen gas was blown in and aerated (mixed) at a rate of 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.2 ppm, and the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 2.1 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.3 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 6 Raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 11.1 ppm, specific gravity: 1.03): 30 L passed through the nitrogen gas replacement device at 150 L / h (superficial velocity: 0.8 m / sec) While being liquid, nitrogen gas was blown in and aerated (mixed) in proportion to 1.1 L / min (volume ratio of nitrogen gas / raw milk: 45%) (immediately after the end of step (A)). The raw milk after mixing this nitrogen gas had a dissolved oxygen concentration of 2.1 ppm and a bubble rate of 10% or less. In addition, the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 11.1 ppm.
  • the inside of the device of the clarifier (Westphalia Separator Co., Ltd., trade name SA-1) which is a separator-type centrifuge ( Nitrogen gas was supplied to the periphery of the bowl at 10 L / min and the oxygen concentration was adjusted to 4%, and then raw milk was passed through the clarifier (back pressure: 0 MPa) at 150 L / h (step (B ) Immediately after the end).
  • the dissolved acidity concentration was 0.2 ppm, and the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.4 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 7 Raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 12.3 ppm, specific gravity: 1.03): 30 L to 150 L / h (superficial velocity: 0.8 m / second) to the vortex pump (Nikuni) ), And nitrogen gas was blown in front of the vortex pump and aerated (mixed) at a rate of 0.33 L / min (volume ratio of nitrogen gas / raw milk: 10%) (in step (A)) Immediately after termination). The raw milk after mixing this nitrogen gas had a dissolved oxygen concentration of 3.0 ppm and a bubble rate of 10% or less.
  • the raw milk is temporarily stored in a storage tank (100 L capacity) and then passed through the nitrogen gas replacement device at a rate of 150 L / h (superficial velocity: 0.8 m / sec). Then, nitrogen gas was blown in and aerated (mixed) at a rate of 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper direction of the nitrogen gas substitution apparatus was 3.0 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.6 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Eddy current pump manufactured by Nikuni: Two units were connected in series. Among these, the vortex pump on the upstream side is referred to as a first vortex pump, and the vortex pump on the downstream side is referred to as a second vortex pump.
  • Raw milk raw milk, temperature: 10 ° C. or less, dissolved oxygen concentration: 12.3 ppm, specific gravity: 1.03): 30 L at 200 L / h (superficial velocity: 0.8 m / sec) to the first vortex pump While flowing, nitrogen gas was blown in front of the first vortex pump and aerated (mixed) at a rate of 0.15 L / min (volume ratio of nitrogen gas / raw milk: 5%).
  • the raw milk is temporarily stored in a storage tank (100 L capacity) and then passed through the nitrogen gas replacement device at a rate of 150 L / h (superficial velocity: 0.8 m / sec). Then, nitrogen gas was blown in and aerated (mixed) at a rate of 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 2.7 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.6 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 9 Raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 13.1 ppm, specific gravity: 1.03): 200 L at 703 L / with a static mixer (inner diameter: 11 mm, 30 elements) installed in a proportional mixing device While flowing at h (superficial velocity: 2.1 m / sec), nitrogen gas was blown in and aerated (mixed) proportionally at 1.25 L / min (volume ratio of nitrogen gas / raw milk: 11%) ( Immediately after the end of step (A)). The raw milk after mixing this nitrogen gas had a dissolved oxygen concentration of 3.4 ppm and a bubble rate of 10% or less.
  • the raw milk is temporarily stored in a milk storage tank (200 L capacity), and then passed through the nitrogen gas replacement device at a flow rate of 150 L / h (superficial velocity: 0.8 m / sec). Then, nitrogen gas was blown in and aerated (mixed) at a rate of 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 3.4 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.8 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 10 Raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 12.0 ppm, specific gravity: 1.03): 280 L / 280 L / liter with a static mixer (inner diameter: 11 mm, 30 elements) installed in a proportional mixing device While flowing at h (superficial velocity: 0.8 m / sec), nitrogen gas was blown in and aerated (mixed) in proportion to 3.5 L / min (volume ratio of nitrogen gas / raw milk: 75%). The raw milk mixed with this nitrogen gas was stored in a storage tank (500 L capacity). Next, raw milk (raw milk, temperature: 10 ° C.
  • dissolved oxygen concentration 12.0 ppm, specific gravity: 1.03): 105 L is added to the proportional mixing apparatus to 280 L / h (superficial velocity: 0.8 m / h). ), Nitrogen gas was blown in and 1.4 L / min (nitrogen gas / raw milk volume ratio: 30%) was aerated (mixed) proportionally, and the raw milk after this nitrogen gas was mixed was stored in the milk storage tank (500 L capacity).
  • raw milk (raw milk, temperature: 10 ° C. or less, dissolved oxygen concentration: 12.0 ppm, specific gravity: 1.03): 105 L is added to the above proportional mixing apparatus to 280 L / h (superficial velocity: 0.8 m / second) ), Nitrogen gas was blown in and 0.7 L / min (nitrogen gas / raw milk volume ratio: 15%) was aerated (mixed) proportionally, and the raw milk after mixing this nitrogen gas was mixed. It stored in the said tank for milk storage (500L capacity) (immediately after completion
  • nitrogen gas was blown into the nitrogen gas replacement device at 150 L / h (empty speed: 0.8 m / sec) while blowing nitrogen gas to 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) was aerated (mixed) proportionally (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.2 ppm, and the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 2.2 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.4 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 11 Raw milk (raw milk, temperature: 10 ° C. or less) in a tank for milk storage (100 L volume) in which an antifoaming device (Toyo Kogyo Co., Ltd., Babkes BK100 type) that breaks bubbles with mechanical shearing force is installed at the top. Dissolved oxygen concentration: 12.0 ppm, specific gravity: 1.03): 80 L was stored.
  • the raw milk is temporarily stored in a milk storage tank (200 L capacity), and then passed through the nitrogen gas replacement device at a flow rate of 150 L / h (superficial velocity: 0.8 m / sec). Then, nitrogen gas was blown in and aerated (mixed) at a rate of 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.2 ppm, and the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 2.0 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.4 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • the nitrogen gas replacement device improved so that the raw material milk replaced with nitrogen gas can be used (in the following examples, abbreviated as “improved nitrogen gas replacement device”).
  • Raw milk raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 12.7 ppm, specific gravity: 1.03: nitrogen gas while passing 100 L at 150 L / h (superficial velocity: 0.8 m / sec) was blown in proportion and aerated (mixed) at a rate of 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (A)).
  • the raw milk after mixing this nitrogen gas had a dissolved oxygen concentration of 1.5 ppm and a bubble rate of 5% or less.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper direction of the improved nitrogen gas substitution apparatus was 1.5 ppm.
  • the raw milk is temporarily stored in a milk storage tank (100 L capacity), and then passed through the nitrogen gas replacement device again at 150 L / h (superficial velocity: 0.8 m / sec). While being liquid, nitrogen gas was blown in and proportionally aerated (mixed) at 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.1 ppm
  • the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper direction of the improved nitrogen gas substitution apparatus was 0.1 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.3 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 13 In the improved nitrogen gas replacement device, in place of the static mixer (inner diameter: 8 mm, 63 elements), in which the static mixer (inner diameter: 47.8 mm, 18 elements) is installed, raw milk (raw milk, temperature: 10 ° C. or less, Dissolved oxygen concentration: 13.1 ppm, specific gravity: 1.03): While passing 5,000 L at 5000 L / h (superficial velocity: 0.8 m / sec), nitrogen gas was blown to 37.5 L / min ( Nitrogen gas / raw milk volume ratio: 45%) was aerated (mixed) in proportion. In addition, the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 2.1 ppm.
  • raw milk was temporarily passed through a defoaming tank (200 L capacity). Specifically, a spray nozzle (Spraying Systems Co., Ltd .; product name: Fulljet 22) is installed above the defoaming tank, and a portion of the raw milk that has passed through the defoaming tank is removed. Branched to the spray nozzle at the top of the foam tank, sprayed onto the liquid surface at a flow rate of 500 L / h with a back pressure of 0.07 MPa, and passed through the milk storage tank while eliminating the bubbles ( Immediately after the end of step (A)). The raw milk after mixing this nitrogen gas had a dissolved oxygen concentration of 2.1 ppm and a bubble rate of 5% or less.
  • raw milk is temporarily stored in a milk storage tank (20,000 L capacity), and then the raw nitrogen is again supplied to the improved nitrogen gas replacement device at 5000 L / h (superficial speed: 0.8 m / second).
  • Nitrogen gas was blown in and 50 L / min (nitrogen gas / raw milk volume ratio: 60%) was aerated (mixed) proportionally (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.2 ppm
  • the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper part of the nitrogen gas substitution apparatus was 0.2 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 10,000 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.4 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 14 Raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 13.1 ppm, specific gravity: 1.03): 200 L at 703 L / with a static mixer (inner diameter: 11 mm, 30 elements) installed in a proportional mixing device While flowing at h (superficial velocity: 2.1 m / sec), nitrogen gas was blown in and aerated (mixed) proportionally at 1.25 L / min (volume ratio of nitrogen gas / raw milk: 11%) ( Immediately after the end of step (A)). The raw milk after mixing this nitrogen gas had a dissolved oxygen concentration of 3.4 ppm and a bubble rate of 10% or less.
  • the raw milk is temporarily stored in a milk storage tank (200 L capacity), and then the raw milk is passed through the improved nitrogen gas replacement device at 150 L / h (superficial velocity: 0.8 m / sec).
  • nitrogen gas was blown in and aerated (mixed) at a rate of 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper direction of the improved nitrogen gas substitution apparatus was 0.4 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.8 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 15 Raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 12.0 ppm, specific gravity: 1.03): 280 L / 280 L / liter with a static mixer (inner diameter: 11 mm, 30 elements) installed in a proportional mixing device While flowing at h (superficial velocity: 0.8 m / sec), nitrogen gas was blown in and aerated (mixed) in proportion to 3.5 L / min (volume ratio of nitrogen gas / raw milk: 75%). The raw milk mixed with nitrogen gas was stored in a storage tank (500 L capacity). Next, raw milk (raw milk, temperature: 10 ° C.
  • dissolved oxygen concentration 12.0 ppm, specific gravity: 1.03): 105 L is added to the proportional mixing apparatus to 280 L / h (superficial velocity: 0.8 m / h).
  • nitrogen gas was blown in and 1.4 L / min (nitrogen gas / raw milk volume ratio: 30%) was aerated (mixed) proportionally, and the raw milk after the nitrogen gas was mixed It stored in the said tank for milk storage (500L capacity).
  • raw milk (raw milk, temperature: 10 ° C. or less, dissolved oxygen concentration: 12.0 ppm, specific gravity: 1.03): 105 L is added to the above proportional mixing apparatus to 280 L / h (superficial velocity: 0.8 m / second) ), Nitrogen gas was blown in and 0.7 L / min (nitrogen gas / raw milk volume ratio: 15%) was aerated (mixed) proportionally, and the raw milk mixed with nitrogen gas was Was stored in a tank for storing milk (500 L capacity) (immediately after the end of the step (A)). In the raw milk after mixing these raw milks, the dissolved oxygen concentration was 2.2 ppm and the bubble rate was 10% or less.
  • nitrogen gas was blown into the improved nitrogen gas replacement device at a flow rate of 150 L / h (empty speed: 0.8 m / sec) and 1.5 L / min (volume ratio of nitrogen gas / raw milk). : 60%) and aerated (mixed) proportionally (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.2 ppm
  • the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper direction of the improved nitrogen gas substitution apparatus was 0.2 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.4 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • Example 16 In the improved nitrogen gas replacement device, raw milk (raw milk, temperature: 10 ° C. or lower, dissolved oxygen concentration: 12.7 ppm, specific gravity: 1.03): 100 L at 150 L / h (superficial velocity: 0.8 m / sec) While flowing, nitrogen gas was blown in and aerated (mixed) at a rate of 0.75 L / min (volume ratio of nitrogen gas / raw milk: 30%) (immediately after the end of step (A)). In the raw milk after mixing this nitrogen gas, the dissolved oxygen concentration was 7.1 ppm and the bubble rate was 5% or less. In addition, the dissolved oxygen concentration of the raw material milk sprayed from the upper direction of the improved nitrogen gas substitution apparatus was 7.1 ppm.
  • the raw milk is temporarily stored in a milk storage tank (100 L capacity), and then the raw nitrogen is again supplied to the improved nitrogen gas replacement device at 150 L / h (superficial velocity: 0.8 m / sec). While flowing, nitrogen gas was blown in and proportionally aerated (mixed) at 1.5 L / min (volume ratio of nitrogen gas / raw milk: 60%) (immediately after the end of step (B)).
  • the dissolved acidity concentration was 0.8 ppm
  • the bubble rate was 5% or less. At this time, almost no foaming was observed in the raw milk.
  • the dissolved oxygen concentration of the raw material milk sprayed from the upper direction of the improved nitrogen gas substitution apparatus was 0.8 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 0.3 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • raw milk was passed through a sterilizer (heat sterilization conditions: 130 ° C., 2 seconds) at 150 L / h.
  • the milk (sterilized milk) after heat sterilization had a dissolved oxygen concentration of 1.7 ppm, a bubble rate of 5% or less, and a liquid temperature of 10 ° C. or less. At this time, almost no foaming was observed in the milk (milk-containing beverage as the final product).
  • the milk of Comparative Example 1 did not have a fresh flavor as compared to the milk of Example 1 and the like because the dissolved oxygen concentration exceeded 1 ppm.
  • raw milk was passed through a sterilizer (heat sterilization condition: 130 ° C., 2 seconds) at 150 L / h (immediately after the end of the step (C)).
  • the dissolved oxygen concentration was 0.9 ppm
  • the bubble ratio exceeded 10%
  • the liquid temperature was 10 ° C. or lower.

Abstract

L'invention concerne un procédé de production d'une boisson contenant du lait qui peut supprimer efficacement le moussage dans le lait cru qui se produit pendant le processus de production tout en réduisant considérablement la concentration d'oxygène dissous de la boisson contenant du lait. Ce procédé de production de boisson contenant du lait implique : (A) une première étape de réduction de la concentration d'oxygène dans laquelle le procédé d'alimentation et les conditions d'alimentation dans un traitement par un gaz inerte sont régulés, le lait cru est soumis au traitement par le gaz inerte de telle sorte que le rapport de mousse du lait cru est inférieur ou égal à 10 %, et ensuite le lait cru est déchargé pour obtenir du lait cru avec une concentration d'oxygène dissous réduite ; (B) une seconde étape de réduction de la concentration d'oxygène dans laquelle le procédé d'alimentation et les conditions d'alimentation dans un traitement par un gaz inerte sont régulés, le lait cru obtenu à l'étape (A) est soumis à un traitement par un gaz inerte de sorte que le rapport de la mousse de lait cru est inférieur ou égal à 10 % pour obtenir du lait cru avec une concentration d'oxygène dissous réduite ; et (C) une étape de stérilisation par chauffage pour stériliser à chaud le lait cru obtenu dans l'étape (B).
PCT/JP2016/081252 2015-10-26 2016-10-21 Procédé de production de boisson contenant du lait WO2017073476A1 (fr)

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SG11201803326WA SG11201803326WA (en) 2015-10-26 2016-10-21 Milk-containing beverage production method
JP2017509057A JP6129463B1 (ja) 2015-10-26 2016-10-21 乳含有飲料の製造方法
CN201680059241.0A CN108135221A (zh) 2015-10-26 2016-10-21 含乳饮料的制造方法
HK18108122.4A HK1248471A1 (zh) 2015-10-26 2018-06-25 含乳飲料的製造方法

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DE3734025A1 (de) * 1987-10-08 1989-04-20 Juchem Franz Gmbh & Co Kg Verfahren zum haltbarmachen eines wasserhaltigen lebensmittels
JPH0549395A (ja) * 1991-08-15 1993-03-02 Morinaga Milk Ind Co Ltd 貯蔵生乳の鮮度保持法
JPH10295341A (ja) * 1997-02-27 1998-11-10 Meiji Milk Prod Co Ltd 風味のよい乳性飲料・果汁飲料の製造方法
JP2001078665A (ja) * 1999-09-09 2001-03-27 Meiji Milk Prod Co Ltd 牛乳等の溶存酸素を窒素ガスと置換して殺菌する方法及び窒素ガス置換装置
JP2003144045A (ja) * 2001-08-31 2003-05-20 Morinaga Milk Ind Co Ltd 牛乳類の製造方法および製造装置
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WO2005115158A1 (fr) * 2004-05-28 2005-12-08 Meiji Dairies Corporation Méthode de fabrication de lait de consommation
JP2006025738A (ja) * 2004-07-20 2006-02-02 Toyo Seikan Kaisha Ltd 容器詰飲料の製造方法
WO2006134979A1 (fr) * 2005-06-14 2006-12-21 Meiji Dairies Corporation Methode pour prevenir la formation d'aromes anormaux dans du lait cru ou pasteurise, et lait pasteurise traite par cette methode
JP2007028901A (ja) * 2005-06-20 2007-02-08 Fuji Oil Co Ltd 水中油型乳化物の製造方法
WO2007029565A1 (fr) * 2005-08-29 2007-03-15 Meiji Dairies Corporation Produit laitier excellent en termes de saveur et de propriete et son procede de production
WO2008068893A1 (fr) * 2006-12-01 2008-06-12 Meiji Dairies Corporation Procédé de production de lait fermenté et lait fermenté
WO2009093407A1 (fr) * 2008-01-21 2009-07-30 Meiji Dairies Corporation Procédé de traitement d'aliments liquides
JP2010252756A (ja) * 2009-04-28 2010-11-11 Ito En Ltd 飲料製造装置及び飲料製造方法
JP2011205997A (ja) * 2010-03-30 2011-10-20 Fuji Oil Co Ltd 水中油型乳化物の製造法
WO2014104415A1 (fr) * 2012-12-28 2014-07-03 株式会社明治 Procédé ainsi que système de fabrication de boisson à base de lait sous emballage

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61115818A (ja) * 1984-11-06 1986-06-03 日本製紙株式会社 液体紙容器への不活性ガス置換方法および同装置
DE3734025A1 (de) * 1987-10-08 1989-04-20 Juchem Franz Gmbh & Co Kg Verfahren zum haltbarmachen eines wasserhaltigen lebensmittels
JPH0549395A (ja) * 1991-08-15 1993-03-02 Morinaga Milk Ind Co Ltd 貯蔵生乳の鮮度保持法
JPH10295341A (ja) * 1997-02-27 1998-11-10 Meiji Milk Prod Co Ltd 風味のよい乳性飲料・果汁飲料の製造方法
JP2001078665A (ja) * 1999-09-09 2001-03-27 Meiji Milk Prod Co Ltd 牛乳等の溶存酸素を窒素ガスと置換して殺菌する方法及び窒素ガス置換装置
JP2003144045A (ja) * 2001-08-31 2003-05-20 Morinaga Milk Ind Co Ltd 牛乳類の製造方法および製造装置
JP2004201601A (ja) * 2002-12-26 2004-07-22 Meiji Milk Prod Co Ltd 風味が良く、流通・保存時の乳化安定性にすぐれたクリーム類およびその製造方法
JP2005304390A (ja) * 2004-04-22 2005-11-04 Izumi Food Machinery Co Ltd 飲料中の溶存酸素濃度を低下させる装置および方法
WO2005115158A1 (fr) * 2004-05-28 2005-12-08 Meiji Dairies Corporation Méthode de fabrication de lait de consommation
JP2006025738A (ja) * 2004-07-20 2006-02-02 Toyo Seikan Kaisha Ltd 容器詰飲料の製造方法
WO2006134979A1 (fr) * 2005-06-14 2006-12-21 Meiji Dairies Corporation Methode pour prevenir la formation d'aromes anormaux dans du lait cru ou pasteurise, et lait pasteurise traite par cette methode
JP2007028901A (ja) * 2005-06-20 2007-02-08 Fuji Oil Co Ltd 水中油型乳化物の製造方法
WO2007029565A1 (fr) * 2005-08-29 2007-03-15 Meiji Dairies Corporation Produit laitier excellent en termes de saveur et de propriete et son procede de production
WO2008068893A1 (fr) * 2006-12-01 2008-06-12 Meiji Dairies Corporation Procédé de production de lait fermenté et lait fermenté
WO2009093407A1 (fr) * 2008-01-21 2009-07-30 Meiji Dairies Corporation Procédé de traitement d'aliments liquides
JP2010252756A (ja) * 2009-04-28 2010-11-11 Ito En Ltd 飲料製造装置及び飲料製造方法
JP2011205997A (ja) * 2010-03-30 2011-10-20 Fuji Oil Co Ltd 水中油型乳化物の製造法
WO2014104415A1 (fr) * 2012-12-28 2014-07-03 株式会社明治 Procédé ainsi que système de fabrication de boisson à base de lait sous emballage

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JPWO2017073476A1 (ja) 2017-10-26
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