KR101653198B1 - Sterilizing Method for Powder type Food using Ozone - Google Patents

Abstract

The present invention relates to a food disinfection method, and more particularly, to a method of disinfecting a food by using an ozone to sterilize a powdery powder of a powder form by an inexpensive method, without causing any change in characteristics such as shape, taste, And a method of sterilizing a powdery food using ozone, which can produce a product from a pure crop by removing harmful substances such as bacteria.
To this end, the present invention provides a method for controlling ozone, comprising warming up an ozone generator and an air pump to maintain a predetermined concentration of ozone; Mixing ozone with a mixing pan to sterilize the powder introduced into the mixing tube; Discharging and neutralizing the injected ozone; And a step of vacuum-packing the powdered food. The present invention also provides a powder-type food sterilizing method using ozone.

Description

TECHNICAL FIELD [0001] The present invention relates to a powder type food sterilization method using ozone (Sterilizing Method for Powder type Food using Ozone)

The present invention relates to a food sterilization method, and more particularly, to a method of sterilizing food by sterilizing powdered powder of crops using ozone in an inexpensive method without changing the shape, taste, The present invention relates to a powder type food disinfection method using ozone, which can remove harmful substances such as fungi and microorganisms to produce products as pure crops.

Generally, in order to produce powdered crops (ginseng, snakes, corn, potatoes, various herbs, etc.) as health food, wire, tea, etc., it is necessary to go through a process of removing bacteria and microorganisms.

However, because of the expensive equipments such as electron beam, ion beam, corona discharge, microwave, high vacuum heating, etc., it is very difficult to apply this process because the equipment cost and process ratio are higher than the product price.

So, although it uses a method of utilizing ion and UV as a low-cost equipment, sterilization power is considerably lowered, so sterilization is considered to be almost impossible so far.

In addition, the most widely used method is that it can not maintain its shape and taste due to the method of applying heat or heat deformation of the material, but also easily loses its efficacy in the case of health food materials.

In addition, when a fungicide is mixed, a consumer must be able to ingest a fungicide, and the taste and potency of the product must inevitably change.

On the other hand, it is possible to make the dryer which artificially dries various kinds of agricultural products to be small, to easily adjust the temperature and air volume of the warm air, and to supply / smoothly circulate hot air sterilized by the ozonizer into the drying chamber, A multipurpose agricultural product sterilizer dryer has been developed which is configured to minimize the temperature difference and to dry the agricultural products more hygienically and efficiently (refer to Korean Patent No. 0569149, "Multi-purpose agricultural product sterilizer dryer").

However, these sterilizers are difficult to apply to powdered crops because they are mounted on the sidewalls and bulkheads of the drying room in a building-like manner, and circulate the warm air produced by the heaters to the drying chamber, thereby changing the taste and efficacy of the crops. And there is no preparation against harmfulness of supplied ozone at all.

Korean Patent No. 0569149 (Mar. 4, 2006)

Disclosure of the Invention The present invention has been proposed in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide an ozone- The object of the present invention is to provide a powder type food sterilization method using ozone which does not create a harmful environment by removing ozone when it is discharged.

In order to achieve the above object, the present invention provides a method of sterilizing powdery food using ozone, comprising the steps of keeping ozone at a constant concentration by warming up an ozone generator and an air pump; Mixing ozone with a mixing pan to sterilize the powder introduced into the mixing tube; Discharging and neutralizing the injected ozone; And vacuum packaging the powdered food.

Preferably, the ozone generator has an output of 5 to 40 g / hr.

Here, the ozone sterilization y time (hr) according to the injection amount of ozone change of generator ^{= 0.00476x 2 - 0.495x + (A} + 2.4), x: an ozone generation amount per hour (g / hr), A: the amount of ozone 5g / hr And the reference processing time (hr).

Before the step of warming up the ozone generator and the air pump, the step of confirming the pollution degree of the powder and the kind of the crop is performed. Confirming the particle size of the powder; And a step of determining a single sterilization treatment amount.

The method may further include the step of determining the number of times of sterilization treatment, the amount of ozone to be injected, and the sterilization treatment time after the step of determining the single sterilization treatment amount.

Preferably, the blending direction of the blending fan is a reverse blading direction for generating an air flow inside the blending container in a bottom direction.

More preferably, the rotational speed of the mixing fan blade is 30 to 50 rpm in the case of a powder having a particle size of 50 to 70 meshes, and the slope of the blades is 33 to 37 degrees.

Preferably, when the charged powder is mixed by the mixing fan, vibrations are generated in the mixing cylinder by the vibrator, and ozone discharged by the heating pipe is heated and removed when discharging and neutralizing the ozone.

The powder-type food sterilization method using the ozone of the present invention having the above-described structure has the following beneficial effects.

First, in the mixing tube, the mixing fan is rotated and the food powder is contacted with a certain concentration of ozone while vibrating, so that it is optimized for powdered food and exhibits excellent sterilizing performance.

Second, in the process of sterilization, ozone air is blown into contact with food powder without heat, so it is possible to remove the bacteria and microorganisms without changing the characteristics of the powdery food, thereby changing the pure taste, color and efficacy (nutrient) Do not.

Third, ozone air can be brought into contact with the microwave sterilization equipment, which can bring about a high sterilization effect with remarkably low cost.

Fourth, it is stored in a certain space to prevent backflow of supplied ozone.

1 is a flow chart illustrating a powdered food sterilization method using ozone according to the present invention;
2 is a graph showing the treatment time according to the change of the ozone amount in the sterilization method according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the powder type food sterilization method using ozone according to the present invention basically comprises the steps of warming up the ozone generator and the air pump (S700), sterilizing ozone (S800) , A step of discharging and neutralizing ozone (not shown), and a step of vacuum packing (S1100).

In the step of warming up the ozone generator and the air pump (S700), the ozone generator and the air pump are warmed up to maintain a constant concentration of ozone.

In this step (S700), the ozone generator and the air pump are operated for about 30 minutes to warm up the ozone generator and simultaneously increase the ozone concentration of the air inside the mixing chamber and the air pump chamber.

In this case, if the operation is performed for less than 30 minutes, the concentration of ozone becomes too low, and the proper amount of ozone can not be supplied to the mixing tube into which the food powder is fed. It is preferable to operate the mixing fan in the mixing cylinder after the operation.

Here, before the step of warming up the ozone generator and the air pump (S700), it is preferable to perform steps (S100 and S200) of checking the degree of contamination of the powder and the kind of the crop, step S300 of checking the grain size of the powder, (S400). ≪ / RTI >

In the following description, the pollution degree of the powder before ozone sterilization treatment is based on detection of E. coli group within 1.0E + 0.4, and all the conditions of powder sterilization are determined based on the products within the standard contamination degree.

If the powder is in the form of hypoallergenic condition above the standard contamination level, the sterilization process must be repeated before reaching the standard contamination level range. After the powder in the hypoallergenic condition falls within the standard contamination range, The sterilization process can be performed by applying the process conditions.

Depending on the type and application of the crop, the size of the powder and the disinfection time vary. In the case of root crops such as ginseng, potatoes, potatoes and sweet potatoes, the number of microorganisms and bacteria is relatively large and the inside of the crop is detected.

Therefore, if the powder size of the root crop is large, the surface treatment time is short, but the bacteria and microorganisms remaining in the inside may be detected or may be reproduced in the process of storing even if not detected immediately after the sterilization process.

Therefore, the better the root crops are, the better the better the sterilization process with finer granules (60 ~ 180mesh), and the more granules based on the standard particle size (100mesh) .

As shown in Table 1 below, the additional treatment time for the grain size of the root crops was observed for about 4 hours based on the same grain size as the leaves and fruit (based on 100 kg of throughput).

division
mesh Leaf, fruit
[Time, ideal] Root crop
[Time, ideal] Remarks 20 to 40 20 24 40 to 60 18 22 60 to 80 16 20 80-100 14 18 100-120 12 16 120 to 140 10 14 140-160 8 12 160-180 6 10

Thus, in order to determine the amount of the powder to be sterilized once (once), the degree of contamination of the powder, the kind of the crop, and the particle size of the powder are checked in advance.

Here, when the amount of sterilization to be sterilized is determined by putting it in a single mixing tube, the size of the mixing tube can be increased and the volume of the mixing tube can be increased. However, the more uniform the size of the mixing tube, the worse the sterilization uniformity inside the mixing tube becomes.

On the other hand, although the throughput can be set to a very small value of 10 Kg or less per one time, the production speed is greatly reduced, so that the reduction of the throughput once does not greatly affect the shortening of the processing time.

This is because it is desirable to set the throughput to 80 to 90% of the maximum value, since the required processing time is basically 80% or more of the reference time regardless of the throughput. However, .

In addition, the method may further include a step S500 of determining the number of times of sterilization treatment, the amount of ozone to be injected, and the sterilization treatment time after the step of determining the sterilization treatment amount once (S400).

In this step S500, once the sterilization treatment amount is determined according to the contamination level of the powder, the type of the crop and the particle size of the powder, the number of times of the sterilization treatment, the amount of the ozone injection and the time of the sterilization treatment are additionally determined .

In step S800 of injecting ozone, the ozone is sterilized by mixing the powder injected into the mixing cylinder (S600) by a mixing pan.

In this step S800, the powder injected into the mixing cylinder is continuously mixed with air while continuously injecting ozone (air) at a constant concentration to shower (sterilize) the powder with ozone.

At this time, the ozone generated in the ozone generator is collected in a predetermined space such as the air pump chamber to maintain the ozone concentration at a predetermined level, and ozone is removed by the air pump in order to prevent the ozone air and the powder from flowing back into the ozone generator. It is preferable to feed the mixture in the mixing cylinder at a high pressure.

Here, the ozone generator generates ozone and basically comprises a cooler and an oxygen generator, and preferably has a production amount of 5 to 40 g / hr.

This is because it is difficult to completely sterilize the food powder if the amount of ozone generated (production amount) falls below 5 g / hr, and if the amount exceeds 40 g / hr, degeneration occurs before the ozone is uniformly mixed with the food powder.

For example, if you want to sterilize a powder with a particle size of 70mesh of 100kg without affecting the characteristics at all, set the amount of ozone to 5g / hr and then operate it for 16 hours or more. Generally, hr for 10 hours. And if you want to process more quickly considering the output, you can run it at 40g / hr for 6 hours.

At this time, the processing time due to the change of the injection ozone amount can be calculated by the following formula (see FIG. 2).

Sterilization time y change in accordance with the injection amount of ozone of the ozone generator ^{(hr) = 0.00476x 2 - 0.495x} + (A + 2.4), x: an ozone generation amount per hour (g / hr), A: standard processing time of the amount of ozone 5g / hr (hr)

Since the mixing uniformity of the powder and ozone air is closely related to the sterilization treatment time, the conditions such as shape, size, number, angle, position and rotation speed of the blades in the mixing bowl are very important Do.

Specifically, the blade direction of the mixing fan is preferably a reverse blade direction (a blade direction in which the direction of wind generation is downward) for generating an air flow inside the mixing cylinder in the bottom direction.

That is, in the case of the reverse vane direction, the air flow inside the mixing cylinder moves to the bottom direction, then rides on the wall of the mixing nipple (inner circumferential surface) to the ceiling, and then forms a circulation of air descending again from the center of the ceiling.

For example, when the rotating shaft rotates in the counterclockwise direction, the mixed fan blade is mounted in the reverse blade direction, and when the wind is formed toward the bottom of the mixing tube, the disinfection time of the powder is shortened by 30% or more I could.

At this time, in order to increase the mixing property of the powder, the blades of the blending fan extend from the center height of the blending pans to opposite edges of the blending pans, and an additional pair extends to opposite edges of the blending pans at the upper and lower heights .

The rotation speed of the mixing fan blades is basically within the range of 20 to 200 rpm. However, the larger the particle size of the powder is, the higher the rotation speed is. In particular, when the mixing fan blades have a rotation speed of 50 to 70 meshes, To 50 rpm is preferable.

Furthermore, the slope of the mixing fan blade needs to be optimized according to the particle size of the powder and the throughput. If the inclination of the blades is too large, the pressure inside the mixing cylinder becomes high and a large amount of powder is blown. It does not work well.

Therefore, it is preferable that the blade has a slope of 33 to 37 ° when the mixing fan blade rotation speed is set to 30 to 50 rpm in the powder having a particle size of 50 to 70 mesh.

After the wings of the mixing fan are variously manufactured in the number of 2, 4, etc., the wings may be rotated so that the wings may be further mounted on the portion where the powder is accumulated in the mixing container or the mixing progresses slowly. , It is needless to say that different slopes of the lower blade can also be adopted in one method.

On the other hand, when the charged powders are mixed by a mixing fan, it is preferable to generate vibrations in the mixing tub by the vibrator so as to separate the powders that are not mixed with the powder attached to the inner wall of the mixing tub.

The vibrator may be mounted on the outer surface of the mixing cylinder, for example, using a plurality of vibration motors that can be used for a long time within 4000 rpm and spanning the mixing cylinder lid and the side surface.

The step of discharging and neutralizing the injected ozone stops the operation of the equipment such as the mixing fan when the sterilization step S800 is completed, and the ozone generator and the air pump are stopped for 30 minutes.

In this case, when the powder is packed without stopping operation for about 30 minutes, it is necessary to discharge and neutralize the ozone for about 30 minutes because the ozone that has been faded in the mixing cylinder may deteriorate the health of the operator. If too much is left, the powder may be re-contaminated.

It is preferable that the ozone discharged by the heating pipe is heated and removed when the ozone is discharged and neutralized at this stage. The heating pipe is installed in the ozone (air) discharge duct of the mixing oven and is discharged from the mixing oven Ozone is removed by heating to 100 to 300 ° C.

The vacuum packaging step (S1100) vacuum-packs the powdered food, and the amount and the packaging material may be changed according to the state of the powder, the storage condition and the delivery condition. For example, it can be vacuum packed in a 20 kg bag of PE material.

In addition, the detection of coliform bacteria can be carried out or the sampling test can be carried out for each packaged product in the above step (S1100). The detection of coliform bacteria is carried out in the quantitative test of the standard food microorganism test method conducted by the Food and Drug Administration Can be carried out according to a dry film method.

The progress of the powder-type food sterilization method using ozone according to the present invention will be described in detail. First, the degree of pollution of the powder, the type of the crop and the particle size of the powder are checked as a pre-stage of powder sterilization (S100, S200, S300) .

After determining the sterilization treatment amount, the sterilization treatment repetition number, the injection ozone amount, and the sterilization treatment time according to the state of the identified powder (S400, S500), the food powder to be sterilized is put into the mixing tube (S600).

Next, the ozone generator and the air pump are warmed up for about 30 minutes (S700), and the mixing fan is rotated to mix the powders to sterilize ozone (S800). At this time, (S900), and repeats the process of warming up and sterilizing the equipment again.

After the ozone is discharged and neutralized (not shown in the figure), the state of the food powder is determined in the inspection step (S1000), and when the sterilization is not sufficiently performed, the process returns to the step of determining the disinfection amount once (S400) So that the work can proceed.

Finally, vacuum packaging is performed according to the state of the powder and the delivery conditions (S1100).

Hereinafter, embodiments of the powder type food sterilization method using ozone according to the present invention will be briefly described.

( Example  1): Pork potato powder 100Kg coliform bacteria sterilization work

Put 100Kg of potato powder (70mesh in particle size) into a mixing bowl.

The ozone generator is operated by adjusting the dial to 5 g / hr.

The ozone generator and the air pump are operated for 30 minutes to warm up the ozone generator and simultaneously increase the ozone concentration in the air pump chamber and air in the mixing tube.

Mixing fan blades inside the mixer are rotated, ozone is supplied, and ozone neutralization is carried out for 30 minutes after completion of sterilization for 20 hours.

After the neutralization of ozone is finished, the powder is discharged through a discharge port. The sample for detection test of coliform bacteria is packed in a 20 kg PE packing bag and vacuum packed.

The coliform group detection test is carried out by the 3M dry film method.

After confirming the negative coliform bacteria, the judgment is completed.

( Example  2): Flour powder 100Kg coliform bacteria sterilization work

Put 100Kg of flour powder (particle size 60mesh) into a mixing bowl.

The ozone generator is operated by adjusting the dial to 20g / hr.

The ozone generator and the air pump are operated for 30 minutes to warm up the ozone generator and simultaneously increase the ozone concentration in the air pump chamber and air in the mixing tube.

Mixing fan blades inside the mixer are rotated and supplied with ozone, and the ozone is neutralized for 30 minutes after completion of sterilization for 11 hours.

After the neutralization of ozone is finished, the powder is discharged through a discharge port. The sample for detection test of coliform bacteria is packed in a 20 kg PE packing bag and vacuum packed.

The coliform group detection test is carried out by the 3M dry film method.

After confirming the negative coliform bacteria, the judgment is completed.

( Example  3): Ginseng powder 100Kg coliform bacteria sterilization work

Put 100Kg of ginseng powder (particle size 80mesh) into a mixing bowl.

The ozone generator is operated by adjusting the dial to 40g / hr.

The ozone generator and the air pump are operated for 30 minutes to warm up the ozone generator and simultaneously increase the ozone concentration in the air pump chamber and air in the mixing tube.

Mixing fan blades inside the mixer are rotated, ozone is supplied, and the ozone is neutralized for 30 minutes after completion of sterilization for 10 hours.

After the neutralization of ozone is finished, the powder is discharged through a discharge port. The sample for detection test of coliform bacteria is packed in a bag of 5 kg of silver foil and then vacuum packaged.

The coliform group detection test is carried out by the 3M dry film method.

After confirming the negative coliform bacteria, the judgment is completed.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is self-evident to those who have.

Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

Claims (8)

Maintaining the ozone at a constant concentration by warming up the ozone generator and the air pump;
Mixing ozone with a mixing pan to sterilize the powder introduced into the mixing tube;
Discharging and neutralizing the injected ozone; And
Vacuum packaging the powdered food product,
Wherein the mixing fan blade has a rotation speed of 30 to 50 rpm in the case of a powder having a particle size of 50 to 70 mesh, and a slope of the blade is in a range of 33 to 37 °. The method according to claim 1,
Wherein the ozone generator has an output of 5 to 40 g / hr. 3. The method of claim 2,
Wherein y (hr) disinfection time in accordance with the injection amount of ozone of the ozone generator to change ^{= 0.00476x 2 - 0.495x + (A} + 2.4), x: an ozone generation amount per hour (g / hr), A: standard processing of the amount of ozone 5g / hr Hour (hr). ≪ / RTI > The method according to claim 1,
Before warming up the ozone generator and the air pump,
Confirming the pollution degree of the powder and the kind of the crop; Confirming the particle size of the powder; And a step of determining a disinfection throughput once. The method of sterilizing powdery food using ozone according to claim 1, 5. The method of claim 4,
After determining the one-time sterilization throughput,
Further comprising the step of determining the number of times of sterilization treatment, the amount of ozone to be injected, and the time of disinfection treatment. The method according to claim 1,
Wherein the blending direction of the blending fan is a reverse blade direction in which air flow inside the mixing tube is generated in a bottom direction. delete The method according to claim 1,
Wherein ozone discharged by a heating pipe is heated and removed when vibration is generated in the mixing cylinder by the vibrator when the charged powders are mixed by the mixing fan and when ozone is discharged and neutralized, Food sterilization method.

Images