KR100958162B1 - Apparatus and method for disposing food waste - Google Patents

Abstract

PURPOSE: A food waste processor and a method thereof are provided to prevent environmental contamination due to food waste etc, and to prevent a foul smell or decay of the food waste after removing moisture in the food waste. CONSTITUTION: A food waste processor comprises the following: a hopper(10); a moisture removing device(20) evaporating moisture contained in food waste by frying the food waste in high temperature oil; a mesh filtering unit(30) filtering solids and oil from the food waste; a centrifuge(40) transferring the oil to the moisture removing device; a buffer storage(50) storing the solids; an oil extractor(60) transferring the extracted oil to the moisture removing device; a cooling device(70) cooling the solids with air; and a crusher(80) pulverizing the cooled solids to powder.

Description

Apparatus and method for disposing food waste}

The present invention relates to a food waste treatment apparatus and method, and more particularly, to form food wastes containing high moisture in a solid content from which water is removed through a process of frying in high temperature oil, and removing the food waste solids. The present invention relates to a food waste treatment apparatus and method for extracting oil from the oil and recycling it again, and also crushing the food waste solids from which both water and oil have been removed into powder to recycle them as feed or fertilizer.

As food waste from general households and restaurants is highlighted as a cause of serious environmental pollution, technologies for disposing of such food waste are continuously being developed.

Recently, many researches and efforts have been made on the treatment of such food waste, for example, fermentation of food waste and recycling to animal feed or organic fertilizers, or dehydration of water contained in food waste to incineration such as general waste. The main way is to use it.

However, the water content of the food waste is generally about 80 to 90%, and even if the food waste is dehydrated in a conventional dehydration device, the water content of about 30 to 40% is still maintained. When the water content of the dehydrated food waste is high, drying or fermentation proceeds slowly, and provides a suitable environment for bacteria to propagate when dried or fermented, and contaminates the surrounding soil and generates odors.

In particular, when the feed or fertilizer is manufactured using a material that is not completely dehydrated during the dehydration and drying process, there is a problem that it is difficult to store for a long time because there is a high risk of bacterial propagation due to moisture, and the deterioration of the product is fast.

In order to solve this problem, Patent Registration No. 715690 has been developed an invention for removing moisture by splashing food waste.

In other words, according to the present invention, the heated oil is stored in a frying-type moisture removing device that removes moisture by splashing food waste, and decompresses oil by compressing the food waste fried with oil through a discharge port. .

According to this invention, the effect of being able to completely remove the water remaining in the food waste in a short time by frying the food waste with high temperature heated oil.

However, in the manner of discharging the food waste simply fried with oil through the discharge port as in the present invention, the oil cannot be completely separated from the fried food waste, thereby causing a problem of constantly replenishing oil. In addition, there is a problem that a secondary treatment process is required to recycle or incinerate fried food waste as feed or fertilizer.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to provide a food waste treatment apparatus and method that can effectively remove the moisture contained in the food waste in a short time.

It is another object of the present invention to make it possible to more efficiently and completely remove the oil contained in the food waste fried with oil.

In another aspect, the present invention, it is another object to be able to perform a secondary treatment process in a single process to recycle the water-removed food waste to feed or fertilizer.

Food waste treatment apparatus according to the present invention for solving the above object, a hopper to which food waste is put; A moisture remover for agitating the food waste conveyed from the hopper with a rotating stirrer to decompose it into small particles and splashing it with oil heated at a high temperature capable of vapor evaporation to evaporate the water contained in the food waste with water vapor; A mesh separator having a screen structure for filtering relatively fine solids and oil from solids and oils of various sizes discharged from the water remover; A centrifugal separator separating only oil from the fine solids and oil filtered by the mesh separator and separating the oil by centrifugal separation; A temporary storage unit in which the relatively large solids not filtered out by the mesh separator and the relatively fine solids separated by the centrifuge are temporarily collected and stored; An oil extractor for compressing the solid content transferred from the temporary storage, extracting oil contained in the solid content, and transferring the extracted oil to a moisture remover; A cooler that cools the solids from which the oil is extracted from the oil extractor by using the sucked external air; It characterized in that it comprises a; crusher in which the solids extracted from the oil cooled in the cooler is pulverized into a powder form.

And the oil extracting unit, the storage unit is accommodated in the solids conveyed from the temporary storage, the input hole through which the solids to escape the lower side formed; A cylinder communicating with the lower side of the storage through the injection hole and having an empty space formed in a longitudinal direction therein; Deoiling hole formed to penetrate at one end of the cylinder so that the oil separated from the solid content can escape to the outside of the cylinder; A first piston that moves backward in the cylinder to open the input hole and moves forward to squeeze the solids; And a second piston for moving forward to one end of the cylinder to support the first piston for compressing the solids, and for opening the one end of the cylinder so that the compressed solids can escape to the outside. Do.

And the food waste treatment method according to the invention, the first step of heating the oil to a high temperature capable of vapor evaporation; A second step of injecting food waste into the heated oil; A third step of agitating the food waste put into the heated oil with a rotating stirrer to decompose it into small particles and splashing it with the heated oil to evaporate the water contained in the food waste with water vapor; A fourth step of filtering the relatively fine solids and oils through the screen of the network structure from the solids and oils of various sizes through the third step; A fifth step of separating only the oil from the fine solids and oil filtered in the fourth step, only the oil through centrifugation; A sixth step of transferring the oil separated in the fifth step to a first step process; A seventh step in which the relatively large solids not filtered out in the fourth step and the relatively fine solids separated in the fifth step are collected in a temporary storage for temporary storage; An eighth step of compressing the relatively large solids not filtered out in the fourth step and the relatively fine solids separated in the fifth step together to extract oil contained in the solids; A ninth step of transferring the oil extracted in the eighth step to the first step process; A tenth step in which the solid content extracted with oil in the eighth step is cooled by the intake air; And an eleventh step of grinding the oil and extracting the cooled solid component into a powder form.

The eighth step may include: an 8-1 step in which the solid content transferred from the temporary storage is accommodated in the storage; Step 8-2, wherein the first piston moves backward in the cylinder to open the injection hole for communicating the reservoir with the cylinder; Step 8-3 through the opening of the input hole, the solid content accommodated in the storage unit is introduced into the cylinder; Step 8-4 to move the second piston forward to close one end of the cylinder; An eighth to fiveth step of compressing solids by moving the first piston forward in the cylinder; Steps 8-6, wherein the oil extracted from the compressed solids exits the cylinder; Steps 8-7 to move the second piston backward to open one end of the cylinder; It is preferably configured to include; eighth to eighth to move the first piston forward, to discharge the oil extracted solid content to the outside of the cylinder.

According to the food waste treatment apparatus and method according to the present invention having the configuration as described above, most of the moisture contained in the food waste can be removed by evaporation with water vapor in the process of splashing in oil, environmental pollution due to food waste And the like can be prevented.

In addition, according to the present invention, by removing all the water and oil from the food waste, and then pulverized into a powder form, the powder is easy to store and distribute, there is no fear of odor or corruption, raw materials or high-quality raw materials or livestock feed It is very suitable for use as organic fertilizer.

In addition, according to the present invention, since the fermentation process is omitted, and all the water removed from the food waste is evaporated into water vapor and then condensed and discharged into the waste water, the food waste can be treated in a very environmentally friendly manner such as odor or leachate generation. have.

In addition, according to the present invention, since the food waste is fried with hot oil, all the bacteria and the like parasitic in the food waste are sterilized.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the food waste treatment apparatus and method according to the present invention.

1 schematically shows a configuration of a food waste treatment apparatus according to the present invention.

Referring to Figure 1, the food waste treatment apparatus according to the present invention, a hopper 10 to which food waste is input, and a water remover 20 to remove moisture by splashing the food waste transferred from the hopper 10 with high temperature oil. ), The mesh separator (30) for filtering out relatively fine solids and oil from the solids and oil discharged from the water remover (20), the centrifuge for separating only the oil again from the fine solids and oil filtered by the mesh separator (30). 40), the temporary storage 50, the relatively large solids not filtered out in the mesh separator 30 and the relatively fine solids separated from the centrifuge 40 are temporarily collected and stored, the temporary storage 50 The oil extractor 60 extracts the oil contained in the solid content by compressing the solid content transferred from the oil, and the solid content transferred from the oil extractor 60 is pulverized into a powder form. It is configured to include a shredder 80.

In addition, the hopper 10 into which the food waste is input, has a large space therein so that a large amount of food waste can be input, a relatively large inlet is formed in the upper portion, and a predetermined amount of food waste can be discharged in the lower portion. Relatively small outlets are formed. Therefore, a large amount of food waste can be introduced into the hopper 10 at a time, the food waste put into the hopper 10 is configured to be continuously transferred to the moisture remover 20 only a certain amount.

And a large amount of oil is stored in the moisture remover 20, the oil stored in the moisture remover 20 is heated to a high temperature capable of vapor evaporation. Therefore, the food waste transported from the hopper 10 to the moisture remover 20 is fried by oil heated to a high temperature, and in the process, most of the moisture contained in the food waste is evaporated and removed.

In this case, when the food waste is fried as it is, only the outside of the food waste may be fried, and the inside of the food waste may not be fried, and in this case, moisture may remain inside the food waste. In order to prevent this, in the present invention, a stirrer (not shown) is installed inside the water remover 20 to rotate in a horizontal or vertical direction, and food waste is decomposed into small particles by the rotating stirrer. It is preferable that even the inside is fried in oil so that moisture can evaporate.

The water removed from the food waste is evaporated in the form of water vapor, and the evaporated water vapor is discharged to the outside by a fan (not shown) that sucks the internal air to the outside. At this time, the water vapor discharged to the outside is preferably condensed by water at room temperature, it is preferably configured to be discharged to the waste water.

On the other hand, the oil stored in the moisture remover 20 and used to fry food waste is edible to livestock or fish, not the human body, such as oil extracted from animal products such as pigs, waste cooking oil, fish, etc. Any oil can be applicable.

The oil heated in the water remover 20 should be heated to a temperature at which water contained in the food waste can be evaporated, that is, a high temperature of 100 ° C. or higher, which is the boiling point of water, and preferably heated to 110 ° C. to 140 ° C., more preferably. Is preferably heated to about 120 ° C. Because, when the temperature to be heated is too low, the processing in the water remover 20 takes a long time, and also the water evaporation effect is reduced, it is impossible to completely remove the water contained in the food waste. And if the temperature to be heated is too high, too much energy is consumed to heat the oil.

In addition, the oil is preferably made up of 80 to 150 parts by weight with respect to 100 parts by weight of food waste in the water remover 20, and particularly preferably 100 parts by weight of oil is equally added to 100 parts by weight of food waste. This is because, if the amount of oil is too small, it takes a long time for the treatment in the water remover 20, and if the amount of oil is too large, too much energy is consumed to heat the oil to a high temperature.

On the other hand, the food waste put into the moisture remover 20 is splashed by hot oil, the contained moisture is evaporated, and at the same time is decomposed into various sizes by a stirrer and discharged. As such, among the solids and oils of various sizes discharged from the water remover 20, the relatively fine solids and oil are filtered out by the mesh separator 30, and the relatively large solids are not filtered out to the temporary storage 50. It is transferred and temporarily stored. As such, the mesh separator 30 is formed of a screen structure of a mesh type so as to separate solids and oil according to size.

That is, while solids and oils of various sizes discharged from the water remover 20 pass through the mesh separator 30 of the screen structure, the solids large enough to not pass through the screen are temporarily filtered without being filtered out of the mesh separator 30. The solids and oil that are fine enough to be transferred to the reservoir 50 and pass through the screen are passed through the screen of the mesh separator 30 and filtered down.

And the fine solids and oil filtered to the bottom of the mesh separator 30 is separated into solids and oil again in the centrifuge (40). To this end, the centrifuge 40 is configured to operate in a centrifugal manner, so that the fine solids and oil filtered out of the mesh separator 30 are separated from each other by centrifugal separation in the centrifuge 40.

And the oil separated in the centrifuge (40) is again transferred to the water remover (20) joined to the oil splashing food waste is recycled, the fine solids separated in the centrifuge (40) is transferred to the temporary storage (50) And is temporarily stored with a relatively large solid that is not filtered out of the mesh separator 30.

As such, the temporary storage 50 is a device in which relatively large solids not filtered out in the mesh separator 30 and relatively fine solids separated in the centrifuge 40 are temporarily collected and stored together. And the solids are temporarily stored in the temporary storage (50), because a certain amount of solids must be collected together to be transferred to the oil extractor (60) to be pressed into the compression process.

A certain amount of solids collected in the temporary storage 50 is transferred to the oil extractor 60 to undergo a compression process, the oil contained in the solid content is extracted through this compression process. In addition, the oil extracted from the oil extractor 60 is transferred to the moisture remover 20 again and joined to the oil to fry food waste.

Meanwhile, the present invention completely separates the oil from the fried food waste, and recycles the oil separated from the food waste to the moisture remover 20 to increase energy efficiency, and also removes food waste from which water and oil are completely removed. It is desirable to be configured for reuse as a fertilizer.

To this end, in the present invention, the oil is first extracted from the mesh separator 30 with respect to the food waste solids fried with oil in the water remover 20, and the remaining oil is completely removed from the oil extractor 60 secondly. It is configured to be extracted.

In order to completely remove the oil from the fried food waste solids, the oil extractor 60 according to the present invention is preferably configured as follows.

2 to 4 illustrate the configuration and operation of the oil extractor in the food waste treating apparatus according to the present invention.

2 to 4, the oil extractor 60 constituting the food waste treatment apparatus according to the present invention includes a storage unit 61 in which the solids A transferred from the temporary storage 50 are accommodated and stored. The cylinder 63 which is in communication with the lower side of the part 61 and the solid content is introduced, the deoiling hole 64 formed to penetrate at one end of the cylinder 63 so that the oil separated from the solid content can flow out of the cylinder 63. The first piston 65 moves forward and backward in the cylinder 63 to compress the solids, and the second piston 66 moves forward to one end of the cylinder 63 to support the first piston 65. It is configured to include.

The storage unit 61 has a structure in which the solids transferred from the temporary storage 50 are accommodated, and an injection hole 62 for penetrating the solids through the cylinder 63 is formed therethrough.

Here, the solid content (A) accommodated in the storage unit 61 is broken down into small particles by the stirrer rotating in the water remover 20 and then splashed by oil to remove water, and then the mesh separator 30. And the food waste solids in which oil is separated primarily by the centrifuge 40.

In addition, the cylinder 63 communicates with the lower side of the storage portion 61 through the injection hole 62, therein, the solid content introduced from the storage portion 61 is accommodated, and the first piston 65 reciprocates. It is made of a structure in which an empty space is formed in the longitudinal direction to enable.

In addition, at one end of the food waste solids compressed in the cylinder 63 by the first piston 65 and the second piston 66, the oil separated from the solids may be pushed out of the cylinder 63 through the compression. The deoiling hole 64 is formed so as to penetrate, and the oil separated from the solid content is discharged to the outside of the cylinder 63 through the deoiling hole 64 and then transferred to the water remover 20 and recycled.

In addition, the first piston 65 which is moved back and forth within the cylinder 63 moves backward in the other direction as shown in FIG. 2, and an injection hole 62 communicating the reservoir 61 and the cylinder 63 with each other. By opening the food waste solids (A) from the storage unit 61 to the cylinder 63 by opening the opening, it is configured to move forward in one direction as shown in Figure 3 to compress the solids.

As shown in FIG. 3, the second piston 66 moves forward to one end of the cylinder 63 to close one end of the cylinder 63 and simultaneously compresses the solids. As shown in FIG. 4, one end of the cylinder 63 is opened so that the compressed solid B may exit out of the cylinder 63 by moving backward.

In addition, the oil extractor 60 according to the present invention further includes a first pump 67 and a second pump 68 for moving the first piston 65 and the second piston 66 back and forth, respectively. It is preferable to be.

The oil extractor 60 according to the present invention configured as described above operates as follows.

Referring to FIG. 2, after the food waste solid content A transferred from the temporary storage 50 is transferred to the storage 61, the first piston 65 moves backward in the cylinder 63 to insert the injection hole ( When the 62 is opened, the solid content A stored in the storage 61 is introduced into the cylinder 63 through the injection hole 62. At this time, the second piston 66 is moved forward to close one side of the cylinder 63, it is preferable that the solid content introduced into the cylinder 63 is not configured to escape to the outside.

Referring to FIG. 3, the first piston 65 is moved forward in the cylinder 63 in the direction of the second piston 66 to compress the solids to extract oil from the solids. At this time, the oil extracted from the compressed solids (B) is discharged to the outside of the cylinder 63 through the deoiling hole 64, and then transported to the water remover 20 is recycled.

And, referring to Figure 4, after all the oil is extracted from the solid by the compression of the first piston 65 and the second piston 66, the second piston 66 is moved backwards to one end of the cylinder 63 After opening, the first piston 65 is moved forward to discharge the solids B from which oil is extracted to the outside of the cylinder 63.

In addition, the solids extracted from oil while being compressed in the oil extractor 60 are then pulverized in a powder form in the grinder 80 and used as a raw material for feed or organic fertilizer.

On the other hand, the food waste treatment apparatus according to the present invention further includes a cooler 70 for cooling the solids by using the sucked external air before the solids discharged from the oil extractor 60 are put into the grinder 80. It is desirable to. That is, the solids extracted from the oil during the compression process in the oil extractor 60 are transferred to the cooler 70, cooled by external air, and then transferred to the grinder 80 to be pulverized into a powder form. do.

Next, with reference to Figure 5 looks at the food waste treatment method according to the present invention.

First, the oil such as waste food is heated to a high temperature capable of vapor evaporation (S10). Here, the oil may include oil extracted from animal products such as pigs, waste cooking oil, oil extracted from fish, and the like. The temperature at which the oil is heated should be at a high temperature of 100 ° C. or higher, which is a temperature at which moisture contained in the food waste can evaporate, preferably 110 ° C. to 140 ° C., and more preferably 120 ° C.

After the oil is heated to a high temperature capable of vapor evaporation, food waste is put into the heated oil (S12). Here, the oil is preferably made up of 80 to 150 parts by weight with respect to 100 parts by weight of food waste put into the heated oil, and particularly preferably 100 parts by weight of oil is equally added to 100 parts by weight of food waste. .

Then, the food waste put into the heated oil is fried, and the water contained in the food waste is evaporated with water vapor (S14). At this time, the inside of the food waste is also fried, so that most of the moisture contained in the food waste is removed, it is preferable to fry while stirring the input food waste. That is, all of the food waste introduced by the stirrer rotating inside the oil is broken down into small particles, and even the inside of the food waste is splashed in the oil so that the water can evaporate.

And the water removed from the food waste is evaporated in the form of water vapor, and the vaporized water vapor is discharged to the outside by a fan that sucks the internal air to the outside, it is configured to be condensed by water at room temperature and discharged into the waste water desirable.

As such, the food waste put into oil is broken down into small particles by a rotating stirrer, splashed by heated oil to remove moisture, and then discharged into solids and oil of various sizes. And from the solids and oils of various sizes discharged from the above, to filter out the relatively fine solids and oil, leaving only a relatively large solids (S16). Separation of solids and oils according to this size is achieved through a screen of the mesh structure. That is, as solids and oils of various sizes pass through the screen, solids that are too large to pass through the screen remain unfiltered, and the fines and oil that are fine enough to pass through the screen are filtered down through the screen. You lose.

Thereafter, only the oil is separated again from the fine solids and oil filtered through the screen, for example, the fine solids and the oil are separated from each other by centrifugal separation (S18).

The oil separated from the fine solids is transferred to the first food waste frying process and joined with the oil frying food waste (S20).

The large solids not filtered through the screen and the fine solids filtered off the screen and separated from oil again are collected in a temporary storage for temporary storage (S22).

The solids of various sizes temporarily stored in the temporary storage, that is, the relatively large solids not filtered out by the screen, and the fine solids separated from the oil after being filtered out of the screen are pressed together to extract the oil contained in the solids ( S24).

The process of extracting the oil contained by compressing the solid content as described above will be described in more detail with reference to FIGS. 2 to 4.

First, as shown in FIG. 2, the food waste solids transferred from the temporary storage 50 are transferred to the storage 61, and then the first piston 65 moves backward in the cylinder 63 to insert the injection hole ( When the 62 is opened, the solid content A stored in the storage 61 is introduced into the cylinder 63 through the injection hole 62. At this time, the second piston 66 is moved forward to close one side of the cylinder 63, it is preferable that the solid content introduced into the cylinder 63 is not configured to escape to the outside.

As shown in FIG. 3, the first piston 65 is moved forward in the cylinder 63 in the direction of the second piston 66 to compress the solids to extract oil from the solids. At this time, the oil extracted from the compressed solid content (B) exits the cylinder 63 through the deoiling hole (64).

As shown in FIG. 4, after all of the oil is extracted from the solids by pressing the first piston 65 and the second piston 66, the second piston 66 is moved backward to move the cylinder 63. One end is opened, and then the first piston 65 is moved forward to discharge the solids B from which oil is extracted to the outside of the cylinder 63.

And the oil extracted from the solid through the compression and exited to the outside of the cylinder 63 is transferred to the first food waste frying process is joined to the oil frying food waste is recycled (S26).

The solids extracted from the oil through the oil extraction process are cooled by inhaled external air (S28), and then crushed into a powder form (S30).

Only about 2% or less of water remains in the food waste powder produced through this process, and the remaining water contained in the food waste is evaporated and removed by steam in the process of being fried in oil. And because it is fried in hot oil, the unique smell of the food waste itself disappears, and all the bacteria and parasitic parasites are sterilized.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone with it will know easily.

1 is a block diagram showing a food waste treatment apparatus according to the present invention.

2 to 4 is a cross-sectional view showing the configuration of the oil extractor in the food waste processing apparatus according to the present invention.

5 is a flow chart showing a food waste treatment method according to the present invention.

Explanation of symbols on the main parts of the drawings

10; Hopper 20; Moisture Remover

30; Mesh separator 40; Centrifuge

50; Temporary storage 60; Oil extractor

61; Storage 62; Hole

63; Cylinder 64; Deoiler

65; First piston 66; 2nd piston

67; First pump 68; 2nd pump

70; Cooler 80; grinder

Claims (4)

A hopper into which food waste is put; A moisture remover for agitating the food waste conveyed from the hopper with a rotating stirrer to decompose it into small particles and splashing it with oil heated at a high temperature capable of vapor evaporation to evaporate the water contained in the food waste with water vapor; A mesh separator having a screen structure for filtering relatively fine solids and oil from solids and oils of various sizes discharged from the water remover; A centrifugal separator separating only oil from the fine solids and oil filtered by the mesh separator and separating the oil by centrifugal separation; A temporary storage for temporarily collecting and storing relatively large solids not filtered by the mesh separator and relatively fine solids separated from the centrifuge; An oil extractor for compressing the solid content transferred from the temporary storage, extracting oil contained in the solid content, and transferring the extracted oil to a moisture remover; A cooler that cools the solids from which the oil is extracted from the oil extractor by using the sucked external air; And a grinder in which solid content extracted from the oil cooled in the cooler is pulverized into a powder form. The oil extractor, A storage unit for receiving the solid content transferred from the temporary storage and penetrating the input hole through which the solid content exits; A cylinder communicating with the lower side of the storage through the injection hole and having an empty space formed in a longitudinal direction therein; Deoiling hole formed to penetrate at one end of the cylinder so that the oil separated from the solid content can escape to the outside of the cylinder; A first piston that moves backward in the cylinder to open the input hole and moves forward to squeeze the solids; A second piston for moving forward to one end of the cylinder to support the first piston for compressing the solids, and for opening the one end of the cylinder so that the compressed solids can escape to the outside; Food waste processing apparatus, characterized in that configured to include. delete A first step of heating the oil to a high temperature capable of vapor evaporation; A second step of injecting food waste into the heated oil; A third step of agitating the food waste put into the heated oil with a rotating stirrer to decompose it into small particles and splashing it with the heated oil to evaporate the water contained in the food waste with water vapor; A fourth step of filtering the relatively fine solids and oils through the screen of the network structure in the solids and oils of various sizes through the third step; A fifth step of separating only the oil from the fine solids and oil filtered in the fourth step, only the oil through centrifugation; A sixth step of transferring the oil separated in the fifth step to a first step process; A seventh step in which the relatively large solids not filtered out in the fourth step and the relatively fine solids separated in the fifth step are collected in a temporary storage for temporary storage; An eighth step of compressing the relatively large solids not filtered out in the fourth step and the relatively fine solids separated in the fifth step together to extract oil contained in the solids; A ninth step of transferring the oil extracted in the eighth step to the first step process; A tenth step in which the solid content extracted with oil in the eighth step is cooled by the intake air; And an eleventh step of grinding the oil extracted and cooled solids into a powder form. The eighth step, A step 8-1 in which the solids transferred from the temporary storage are accommodated in the storage; Step 8-2, wherein the first piston moves backward in the cylinder to open the injection hole for communicating the reservoir with the cylinder; Step 8-3 through the opening of the input hole, the solid content accommodated in the storage unit is introduced into the cylinder; Step 8-4 to move the second piston forward to close one end of the cylinder; An eighth to fiveth step of compressing solids by moving the first piston forward in the cylinder; Steps 8-6, wherein the oil extracted from the compressed solids exits the cylinder; Steps 8-7 to move the second piston backward to open one end of the cylinder; An eighth to eighth movement of the first piston to discharge the solids from which the oil is extracted to the outside of the cylinder; Food waste treatment method comprising a. delete

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