Fresh milk sterilization system

Abstract

The utility model relates to a fresh milk sterilization system, and belongs to the technical field of food processing. The heating device, the skimming and separating device, the cream sterilizing device and the circulating sterilizing microfiltration system are arranged and combined with the flow and pressure detection device to form a complete sterilizing system, so that single cream and skimmed milk separated from fresh milk can be sterilized in branches, the skimmed milk can run at the temperature lower than 60 DEG C, the sterilizing effect is good, and the service life of the skimmed milk is prolonged. According to the method, the quality of the fresh milk is guaranteed while microorganisms and spores in the fresh milk are removed, a large amount of denaturation of active substances in the fresh milk is not caused, the active substances in the fresh milk are reserved to the maximum extent, the process loss is small, and the yield is high.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh milk processing equipment, in particular to a fresh milk sterilization system. Background Art

[0002] In addition to the basic nutrients protein, fat, lactose and minerals, fresh milk also contains hundreds of bioactive substances such as β-lactoglobulin, α-lactalbumin, lactoferrin, immunoglobulin, lactoperoxidase, bioactive peptides, etc. These bioactive substances are the essence of fresh milk and play an important role in resisting the invasion of pathogens such as bacteria, activating the body's immune response, and maintaining the health of the body. These bioactive substances are very sensitive to temperature. For example, α-lactalbumin begins to denature due to structural changes above 80°C; immunoglobulin denatures 15% when heated at 65°C for 30 minutes and 34% when heated at 72°C for 15 seconds; lactoferrin decreases by 26% when heated at 65°C for 30 minutes, decreases by 74% when heated at 75°C for 30 minutes, and almost completely denatures after heating at 85°C for 30 minutes. In order to retain the above-mentioned active substances to the greatest extent, the fresh milk sterilization temperature is required to be as low as possible and the time as short as possible. However, the microorganisms in the fresh milk cannot be killed at low temperatures, making the fresh milk difficult to preserve and easy to deteriorate. Microorganisms such as thermotolerant cocci and bacillus cannot be inactivated at all under low-temperature and short-time sterilization process conditions, posing a quality risk.

[0003] There are two common sterilization processes at present. One is ultra-high temperature instantaneous sterilization (UHT, 135-150℃, 4-15s), which can kill all microorganisms in fresh milk and meet the requirements of commercial sterility. However, the active substances in fresh milk are basically lost due to high temperature. The other is pasteurization (72-75℃, 15-20s). The sterilization conditions are relatively mild. Compared with UHT, more active substances in fresh milk are retained, but its sterilization efficiency is about 97.3%-99.9%. Some heat-resistant bacteria and spores will remain. It needs to be refrigerated at low temperature and has a shelf life of 3-7d. Once it is out of low temperature protection, the quality of fresh milk may be reduced, and quality risks may occur.

[0004] However, sterilization at a higher temperature is not conducive to the retention of active substances in fresh milk. At present, fresh milk sterilization is carried out by separating fresh milk into skimmed milk and cream through a skimming separator. The skimmed milk containing active substances is sterilized separately to remove microorganisms and spores in the fresh milk, while the cream without active substances is sterilized by UHT. Finally, the sterilized cream and skimmed milk are mixed and homogenized for filling, which retains the active substances in the fresh milk to the greatest extent and ensures the quality of the fresh milk. For example, the sterilization separator used in existing research can remove 98%-99.5% of anaerobic spores, 95% of aerobic spores and 80-82% of microorganisms at 55-60°C (low temperature), and automatically removes sediment regularly by centrifugation, which can be used to remove microorganisms and spores in fresh milk. Although the sterilization separator can effectively retain the active substance components at low temperatures, the sterilization is still not thorough, and there are quality risks. The prior art CN116784385A also performs low-temperature sterilization by setting up multiple sterilization filtration (microfiltration) devices to retain more active substances. However, a lot of intercepted liquid will be generated after multiple filtrations, and direct discharge will cause very serious waste and high cost. Mixing the intercepted liquid after microfiltration with cream and then sterilizing it will also destroy the active substances in the intercepted liquid, reduce the content and yield of the active substances, and have low benefits. Utility Model Content

[0005] The utility model aims to solve the problems of low active substance content, incomplete sterilization and waste of intercepted liquid in the existing fresh milk during low-temperature sterilization, and to provide a fresh milk sterilization system.

[0006] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0007] The utility model provides a fresh milk sterilization system, comprising a buffer tank, a heating device, a degreasing separation device, a circulating sterilization microfiltration system, and an aseptic homogenization device connected in sequence by pipelines; the circulating sterilization microfiltration system comprises a sterilization separation device, a microfiltration buffer tank, and a microfiltration device connected in sequence; wherein the microfiltration device contains a microfiltration membrane, a one-way intercepting pipe is also connected to the microfiltration device, and the other end of the one-way intercepting pipe is connected between the sterilization separation device and the degreasing separation device; a cream sterilization device is also connected between the degreasing separation device and the aseptic homogenization device.

[0008] The fresh milk sterilization system provided by the utility model heats the fresh milk at a low temperature and then performs skimming and separation, thereby retaining the activity of the active substances in the fresh milk, and sterilizing the skimmed milk and the cream containing the active substances separately, and the skimmed milk passes through a circulating sterilization microfiltration system, and adopts a sterilization separation combined with microfiltration method to discharge microorganisms and spores, and the retentate produced by the microfiltration device is returned to the sterilization separation device through a one-way interception pipe, and is mixed with the skimmed milk separated by the skimming separation device and enters the sterilization separation device again for sterilization and separation treatment, and the skimmed milk sterilized by the microfiltration device is directly Then it flows into the subsequent links; a one-way interception pipe is used, and the intercepted liquid can only flow out of the microfiltration membrane to the sterilization separation device, and cannot flow into the skimming separation device, causing the intercepted liquid to circulate one-way in the circulating sterilization microfiltration system, and the microfiltration retentate enters the circulating sterilization microfiltration system again for sterilization and recovery, which not only improves the yield of active substances, but also reduces the loss in the sterilization process, avoids waste, and reduces costs; the cream that does not contain active substances is then sterilized by UHT, and finally the sterilized cream and skimmed milk are mixed and homogenized for filling, thereby completing the entire process of low-temperature fresh milk sterilization.

[0009] The fresh milk sterilization system provided by the utility model can not only recycle the intercepted liquid for circulating sterilization to achieve the best sterilization effect, but the system can also perform sterilization at a temperature below 60°C during the entire sterilization process, thereby removing microorganisms and spores in the fresh milk while ensuring the quality of the fresh milk, without causing the denaturation of active substances in the fresh milk, retaining the active substances in the fresh milk to the greatest extent, improving the sterilization efficiency, and reducing the loss of active substances in the sterilization process, thereby reducing equipment loss and waste of raw materials, increasing the content of active substance components, and achieving more efficient benefits.

[0010] Furthermore, a first centrifugal pump is provided between the buffer tank and the heating device, and a second centrifugal pump is provided between the heating device and the degreasing separation device.

[0011] Preferably, the heating device is a plate heat exchanger or a tube heat exchanger.

[0012] Furthermore, in the circulating sterilization microfiltration system, a third centrifugal pump and a first flow detection device are connected between the microfiltration buffer tank and the microfiltration device; and a first regulating valve is arranged on the one-way intercepting pipe.

[0013] Furthermore, a second flow detection device, a second regulating valve, and a fourth centrifugal pump are connected between the circulating sterilization microfiltration system and the sterile homogenization device.

[0014] Preferably, the microfiltration membrane is an inorganic ceramic membrane or a hollow fiber membrane with a pore size of 0.8-1.4 microns.

[0015] Furthermore, a pressure detection device is provided between the circulating sterilization microfiltration system and the second flow device.

[0016] Furthermore, the flow detection device is an electromagnetic flowmeter or a mass flowmeter.

[0017] Preferably, the cream sterilizing device is a tube-type sterilizer or a plate-type sterilizer.

[0018] Furthermore, a fifth centrifugal pump is arranged between the cream sterilizing device and the aseptic homogenizing device.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model discloses a fresh milk sterilization system, comprising a buffer tank, a heating device, a degreasing separation device, a circulating sterilization microfiltration system, and an aseptic homogenization device connected in sequence by pipelines; the circulating sterilization microfiltration system comprises a sterilization separation device, a microfiltration buffer tank, and a microfiltration device connected in sequence; wherein the microfiltration device contains a microfiltration membrane, a one-way intercepting pipe is also connected to the microfiltration device, and the other end of the one-way intercepting pipe is connected between the sterilization separation device and the degreasing separation device; a cream sterilization device is also connected between the degreasing separation device and the aseptic homogenization device; the fresh milk sterilization system provided by the utility model can be carried out under the condition of less than 60°C during the whole sterilization process, and the circulating sterilization is carried out by recycling the intercepting liquid, so that the quality of the fresh milk can be ensured while removing microorganisms and spores in the fresh milk, without causing the denaturation of active substances in the fresh milk, and the active substances in the fresh milk are retained to the greatest extent, reducing equipment loss and raw material waste, and improving the content of active substance components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the fresh milk sterilization system in Example 1.

[0022] Figure 2 This is the circulating sterilization microfiltration system in Example 1.

[0023] Figure 3 This is the fresh milk sterilization system in Example 3.

[0024] Figure markings: 1-buffer tank, 2-first centrifugal pump, 3-heating device, 31-hot water inlet, 32-hot water outlet, 21-second centrifugal pump, 4-degreasing separation device, 5-circulating sterilization microfiltration system, 51-sterilization separation device, 52-microfiltration buffer tank, 53-third centrifugal pump, 54-first flow detection device, 55-microfiltration device, 56-one-way interception pipe, 57-first regulating valve, 6-aseptic homogenization device, 7-cream sterilization device, 72-ice water inlet, 71-ice water outlet, 73-hot water inlet, 74-hot water outlet, 23-fifth centrifugal pump, 8-second flow detection device, 22-fourth centrifugal pump, 9-pressure detection device, 10-second regulating valve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "device", "connection" and "setting" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] It should be noted that the utility model is a fresh milk sterilization system, and its components are all universal standard parts or components known to technicians in this field. Its structure and principle can be known to technicians in this field through technical manuals or through conventional experimental methods.

[0029] Example 1

[0030] The utility model provides a fresh milk sterilization system, comprising a buffer tank 1, a first centrifugal pump 2, a heating device 3, a second centrifugal pump 21, a degreasing separation device 4, a circulating sterilization microfiltration system 5, a second flow detection device 8, a second regulating valve 10, a fourth centrifugal pump 22, and an aseptic homogenization device 6, which are sequentially connected by pipelines; the degreasing separation device 4 is also connected to a cream sterilization device 7, and the other end of the cream sterilization device 7 is connected between the fourth centrifugal pump 22 and the aseptic homogenization device 6. The specific system structure schematic diagram is shown in FIG. Figure 1 shown.

[0031] The circulating sterilization microfiltration system 5 comprises a sterilization separation device 51, a microfiltration buffer tank 52, a third centrifugal pump 53, a first flow detection device 54, and a microfiltration device 55, which are connected in sequence; wherein the microfiltration device 55 is also connected to a one-way intercepting pipe 56, the other end of which is connected between the sterilization separation device 51 and the degreasing separation device 4, and a first regulating valve 57 is also provided on the one-way intercepting pipe 56. The specific system structure diagram of the circulating sterilization microfiltration system 5 is shown in FIG. Figure 2 shown.

[0032] When the fresh milk sterilization system of the utility model is used: the fresh milk is passed into the buffer tank 1 to stabilize the subsequent flow, and then the fresh milk is input into the heating device 3 through the first centrifugal pump 2 (here is a variable frequency pump), the heating device 3 adopts a plate heat exchanger to heat to a set value, the plate heat exchanger set value (55-60°C), and a hot water inlet 31 and a hot water outlet 32 ​​are arranged on the heating device for hot water reflux and low-temperature heating; then the fresh milk is sent to the degreasing separation device 4 through the second centrifugal pump 21, a degreasing separator is used, and the speed is set to 8000-10000rpm, and the fresh milk is separated into skimmed milk and cream by centrifugal force, and the skimmed milk is input into the circulating sterilization microfiltration system 5, and the cream is input into the cream sterilization device 7.

[0033] The skimmed milk first enters the sterilization separation device 51 from the circulating sterilization microfiltration system 5, and adopts a sterilization separator with a rotation speed of 6000-8000rpm to remove microorganisms and spores in the skimmed milk by centrifugal force; the sterilized skimmed milk is sent to the microfiltration buffer tank 52, and the pressure entering the microfiltration device 55 is first controlled by a centrifugal pump 53 (here a variable frequency pump) to stabilize the sterilization efficiency of the microfiltration device 55; then the first flow detection device 54 uses an electromagnetic flowmeter to monitor the flow of fresh milk entering the microfiltration device 55, and then the fresh milk is input into the microfiltration device 55; the microfiltration device 55 contains a microfiltration membrane, which adopts an inorganic ceramic membrane with a pore size of 0.8-1.4 microns. When the fresh milk passes through the microfiltration membrane, it is deodorized under pressure. The fat milk flows out through the pores of the inorganic ceramic membrane, and the concentrated milk containing microorganisms and spores is retained as the intercepted liquid; the intercepted liquid returns to the entrance of the sterilization separator through the one-way interception pipe 56, is mixed with the skimmed milk that has passed through the skimming separator, and is sterilized and separated again through the sterilization separator to remove the microorganisms and spores, thereby performing a circulating sterilization of the intercepted liquid; a first regulating valve 57 is provided on the one-way interception pipe 56 for regulating the flow of the microfiltration membrane retentate to the sterilization separator. The one-way interception pipe 56 is provided so that it can only flow out from the microfiltration membrane to the sterilization separation device 51, and cannot flow into the skimming separation device 4, so that the intercepted liquid circulates unidirectionally in the circulating sterilization microfiltration system 5, thereby performing repeated sterilization (the number of cycles depends on the actual sterilization situation).

[0034] The retentate passing through the microfiltration device 55 is returned to the inlet of the sterilizing separator, mixed with the skimmed milk separated by the skimming separator and then enters the sterilizing separator for sterilization and separation treatment. Microorganisms and spores are discharged through the sterilizing separator, and the retentate enters the microfiltration membrane again for sterilization and recovery, which not only improves the yield and reduces process losses, but also retains the active substances in the fresh milk to the greatest extent.

[0035] After being sterilized by the circulating sterilization microfiltration system 5, the fresh milk passes through the second flow detection device 8 and the second regulating valve 10. The second flow detection device 8 adopts an electromagnetic flowmeter to detect the flow of the microfiltration membrane effluent and controls the second regulating valve 10 through an electrical signal. When the ratio of the flow of the electromagnetic flowmeter of the first flow device 54 to the flow of the flowmeter here is greater than the set value, the regulating valve opens to increase the flow of the microfiltration membrane effluent; when the ratio of the flow of the electromagnetic flowmeter of the first flow device 54 to the flow of the flowmeter here is less than the set value, the regulating valve closes to reduce the flow of the microfiltration membrane effluent; the second regulating valve 10 is associated with the electromagnetic flowmeter of the second flow detection device 8 through an electrical signal to adjust the flow of the microfiltration membrane effluent; and then the effluent is sent to the sterile homogenizing device 6 through the fourth centrifugal pump 22 (here is a variable frequency pump).

[0036] The cream sterilizing device 7 adopts a tubular sterilizer with a sterilization temperature of 120-130°C for 4-6s, which is used to sterilize the cream removed from the degreasing separator. The sterilizer is provided with a hot water inlet 73 and a hot water outlet 74, as well as an ice water inlet 72 and an ice water outlet 71, which are convenient for water heating and sterilization and cold water cooling. After sterilization, the sterilized cream from the cream pasteurizer is sent to the aseptic homogenizing device 6.

[0037] The aseptic homogenizing device 6 is connected with the light cream sterilized by the cream sterilizing device 7 and the skimmed milk sterilized by the sterilizing microfiltration system. An aseptic homogenizer is used with a first-level pressure of 20 to 40 bar and a total pressure of 200 to 250 bar to aseptically homogenize the mixture of light cream and skimmed milk to ensure that the homogenized liquid is uniform and stable. The homogenized liquid enters the subsequent equipment for processing, thus completing the entire process of fresh milk sterilization.

[0038] Example 2

[0039] The utility model provides a fresh milk sterilization system, comprising a buffer tank 1, a first centrifugal pump 2, a heating device 3, a second centrifugal pump 21, a degreasing separation device 4, a circulating sterilization microfiltration system 5, a second flow detection device 8, a second regulating valve 10, a fourth centrifugal pump 22, and an aseptic homogenization device 6 which are sequentially connected by pipelines; the circulating sterilization microfiltration system 5 comprises a sterilization separation device 51, a microfiltration buffer tank 52, a third centrifugal pump 53, a first flow device 54, and a microfiltration device 55 which are sequentially connected; wherein a one-way intercepting pipe 56 is further connected to the microfiltration device 55, and the other end of the one-way intercepting pipe 56 is connected between the sterilization separation device 51 and the degreasing separation device 4; and a cream sterilization device 7 is further connected to the degreasing separation device 4, and the other end of the cream sterilization device 7 is connected between the fourth centrifugal pump 22 and the aseptic homogenization device 6.

[0040] When the fresh milk sterilization system of the utility model is used: fresh milk is passed into a buffer tank 1, firstly through a first centrifugal pump 2, the fresh milk is input into a heating device 3, the heating device 3 adopts a tubular heat exchanger for heating, and then through a second centrifugal pump 21 (here a variable frequency pump is adopted) the fresh milk is sent into a skimming separation device 4, and the milk beating flow rate is controlled; the fresh milk is separated into skimmed milk and cream in the skimming separation device 4, the skimmed milk is input into a circulating sterilization microfiltration system 5, and the cream is input into a cream sterilization device 7.

[0041] The skimmed milk first enters the sterilization separation device 51 from the circulating sterilization microfiltration system 5 to remove microorganisms and spores in the skimmed milk; the sterilized skimmed milk is sent to the microfiltration buffer tank 52, first passes through the third centrifugal pump 53 to control the pressure entering the microfiltration device 55 to stabilize the sterilization efficiency of the microfiltration device 55; then passes through the first flow device 54, using an electromagnetic flowmeter to monitor the flow of fresh milk entering the microfiltration device 55, and then the fresh milk is input into the microfiltration device 55; the microfiltration device 55 contains a microfiltration membrane, which uses a hollow fiber membrane with a pore size of 0.8-1.4 microns. When the fresh milk passes through the microfiltration membrane, the skimmed milk flows out through the pores of the hollow fiber membrane under pressure, and the concentrated milk containing microorganisms and spores is retained, and the retained liquid after passing through the microfiltration membrane The milk is returned to the inlet of the sterilizing separator 51 through the intercepting pipe 56, mixed with the skimmed milk that has passed through the skimming separator, and sterilized and separated again through the sterilizing separator 51 to remove microorganisms and spores. A first regulating valve 57 is provided on the intercepting pipe 56 for adjusting the flow rate of the microfiltration membrane retentate to the sterilizing separator. A one-way intercepting pipe 56 is provided so that the retentate can only flow out from the microfiltration membrane to the sterilizing separator 51 and cannot flow into the skimming separator 4, so that the intercepted liquid circulates in one direction in the circulating sterilizing microfiltration system 5. The subsequent process of the fresh milk after sterilization by the circulating sterilizing microfiltration system 5 is the same as that in Example 1. In this embodiment, the cream sterilizing device 7 adopts a plate sterilizer, and the settings and parameter functions of other devices are the same as those in Example 1.

[0042] Example 3

[0043] The utility model provides a fresh milk sterilization system, comprising a buffer tank 1, a first centrifugal pump 2, a heating device 3, a second centrifugal pump 21, a degreasing separation device 4, a circulating sterilization microfiltration system 5, a pressure detection device 9, a second flow detection device 8, a second regulating valve 10, a fourth centrifugal pump 22, and an aseptic homogenization device 6 connected in sequence by pipelines; the circulating sterilization microfiltration system 5 comprises a sterilization separation device 51, a microfiltration buffer tank 52, a third centrifugal pump 53, a first flow detection device 54, and a microfiltration device 55 connected in sequence; wherein the microfiltration device 55 is also connected to a one-way intercepting pipe 56, the other end of which is connected between the sterilization separation device 51 and the degreasing separation device 4, and a first regulating valve 57 is arranged on the one-way intercepting pipe 56; the degreasing separation device 4 is also connected to a cream sterilization device 7, the other end of which is provided with a fifth centrifugal pump 23 and connected between the fourth centrifugal pump 22 and the aseptic homogenization device 6, and the specific system structure schematic diagram is as shown in FIG. Figure 3 shown.

[0044] The settings of the devices used in this embodiment and the functions of the parameters are the same as those in Example 1, wherein the first and second flow detection devices 54 and 8 use mass flow meters, and the pressure detection device 9 uses a pressure sensor to monitor the operating pressure value of the microfiltration membrane. When the pressure value deviates from the set value, the microfiltration membrane must be cleaned and maintained or the membrane core must be replaced after the operation is stopped.

[0045] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the scope of the principle of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The technical solution of the utility model may be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A fresh milk sterilization system, characterized in that: It comprises a buffer tank (1), a heating device (3), a degreasing separation device (4), a circulating sterilization microfiltration system (5), and a sterile homogenizing device (6) which are sequentially connected by pipelines; The circulating sterilization microfiltration system (5) comprises a sterilization separation device (51), a microfiltration buffer tank (52), and a microfiltration device (55) which are connected in sequence; wherein the microfiltration device (55) comprises a microfiltration membrane, and a one-way intercepting pipe (56) is also connected to the microfiltration device (55), and the other end of the one-way intercepting pipe (56) is connected between the sterilization separation device (51) and the degreasing separation device (4); A cream sterilizing device (7) is also connected between the degreasing separation device (4) and the aseptic homogenizing device (6).

2. The fresh milk sterilization system according to claim 1, characterized in that: A first centrifugal pump (2) is provided between the buffer tank (1) and the heating device (3), and a second centrifugal pump (21) is provided between the heating device (3) and the degreasing separation device (4).

3. The fresh milk sterilization system according to claim 2, characterized in that: The heating device (3) is a plate heat exchanger or a tube heat exchanger.

4. The fresh milk sterilization system according to claim 3, characterized in that: In the circulating sterilization microfiltration system (5), a third centrifugal pump (53) and a first flow detection device (54) are connected between the microfiltration buffer tank (52) and the microfiltration device (55); and a first regulating valve (57) is provided on the one-way intercepting pipe (56).

5. The fresh milk sterilization system according to claim 4, characterized in that: A second flow detection device (8), a second regulating valve (10), and a fourth centrifugal pump (22) are connected between the circulating sterilization microfiltration system (5) and the sterile homogenization device (6).

6. The fresh milk sterilization system according to claim 5, characterized in that: The microfiltration membrane is an inorganic ceramic membrane or a hollow fiber membrane with a pore size of 0.8-1.4 microns.

7. The fresh milk sterilization system according to claim 5, characterized in that: A pressure detection device (9) is also provided between the circulating sterilization microfiltration system (5) and the second flow detection device (8).

8. The fresh milk sterilization system according to claim 4, characterized in that: The first flow detection device (54) and the second flow detection device (8) are electromagnetic flow meters or mass flow meters.

9. The fresh milk sterilization system according to claim 1, characterized in that: The cream sterilizing device (7) is a tube-type sterilizer or a plate-type sterilizer.

10. The fresh milk sterilization system according to claim 1, characterized in that: A fifth centrifugal pump (23) is arranged between the cream sterilizing device (7) and the aseptic homogenizing device (6).

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