JP2001212544A - Garbage disposal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a garbage disposal device in which garbage is decomposed by using bacteria and bacteria materials containing food for the bacteria, in which the treated water generated by decomposion is quickly discharged to a drain without logging small holes in the drain-plate at the bottom of the agitator with the garbage, and which has a garbage decomposion capacity sufficent for business use. SOLUTION: The garbage disposal device is characterized by comprising an agitating vessel 2 of which the lower part 2a fixed horizontally in a box body 10 is formed in a semi-cylindrical shape over the whole length of a horizontal direction and of which the upper part 2b is formed in an opening state, an agitation shaft 3 which is rotatably pivoted on the above agitation vessel 2 and provided with a plurality of agitation bodies 12 in radial directions, a driving mechanism 4 which rotates the above agitation shaft 3, a drain-plate 5 which has a number of small holes 5a and attached to cover the lower part 2b, and a water spray pipe 8 which is provided with a number of outlets 8a which sprays water 26 into the agitation vessel 2 and placed in the box body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a garbage disposal apparatus, and more particularly to a garbage disintegrating device using bacterial material containing bacteria and food for the bacterium, and a small hole in a drain plate at the bottom of a stirring tank. Is capable of quickly discharging treated water generated by the decomposition treatment to the drain without clogging with the garbage, and having excellent stirring performance and decomposition treatment capacity, and converting garbage into mere water. The present invention relates to an innovative and extremely practical garbage processing apparatus.

[0002]

2. Description of the Related Art Currently, the amount of biological organic waste (hereinafter referred to as garbage) discharged domestically is about 20 million tons per year, and conventionally, mainly due to incineration and disposal at final disposal sites. However, in the case of incineration, there is a problem of dioxin generation, and in the case of a final disposal site, it is necessary to construct a new final disposal site when the capacity reaches the limit. Increasing interest has caused strong opposition from residents who are concerned about contamination of groundwater near the planned construction site, making it extremely difficult to construct a new final disposal site for garbage by landfill.

[0003] Therefore, attention has been paid to garbage disposal that can be carried out in ordinary households and businesses, etc. on the premise of recycling. One of them is composting, which is traditionally known.

[0004] A typical example is a compost container which is a tubular body with a detachable lid and is directly installed on soil such as a garden or a field, and garbage and soil are piled up in the compost container so that the soil is removed. The garbage is naturally composted by the action of microorganisms inside. However, in this composting that is left to nature, it takes about two to three months for the garbage to be composted, so there is no ability to quickly process a large amount of garbage for business use.

[0005] As a device having an improved decomposition treatment capacity, electric garbage disposal devices for home use and business use have been provided. This is to put the microorganisms together with the garbage into the stirring tank of the apparatus and to stir them to promote the decomposition action by the microorganisms.

In the case of an electric garbage processing apparatus, the purpose is not to convert garbage into compost, but to decompose the garbage into water that can be discharged to a sewer or the like. Therefore, it is necessary to smoothly discharge water generated by the decomposition of garbage from the stirring tank. For this reason, a small hole having a diameter of about 1 mm is formed in the stirring tank to discharge only water without discharging garbage. Have been.

However, since the small holes have a small diameter, clogging is likely to occur due to garbage during stirring, which causes a problem that drainage is not sufficiently performed and the holes are stuck in the stirring tank.

[0008] Further, a conventional electric garbage disposal apparatus generally uses a screw to perform agitation, and the operation system is an intermittent operation system in which garbage is alternately agitated and stopped. Therefore, in order to activate the microorganisms and improve the decomposition treatment ability, there has not been provided a method of spraying water on garbage at a certain timing.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and has as its object the purpose of the present invention to be fixed horizontally in a housing and to have a lower portion extending horizontally. A stirring tank formed in a semi-cylindrical shape and having a bottom formed in an open state, a stirring shaft rotatably supported by the stirring tank and a plurality of stirring bodies mounted radially, and a stirring shaft. A drive mechanism for rotating and driving, a drainage plate attached to cover the bottom and formed with a number of small holes, and a number of discharge ports for discharging water for dispersing into a stirring tank disposed in the housing are formed. By providing a sprinkling pipe, water can be sprayed on the garbage in the stirring tank, thereby activating the bacteria that decompose the garbage, and dramatically improving the decomposition processing capacity of the garbage. It is.

Another object of the present invention is to provide, in addition to the above-described structure, a configuration in which an upper portion of a small hole of a drainage plate is formed to protrude into an annular jetty so that garbage being disassembled does not clog the small hole. The purpose is to allow only the water generated by the decomposition to be smoothly discharged out of the stirring tank, and to prevent water from staying in the stirring tank to kill bacteria, and to be stable for a long time. It is to be able to perform the decomposition processing of garbage.

Still another object of the present invention is to form a large number of projections on the surface of the stirring body in addition to the above-described structure, and to increase the ability of the stirring body to stir garbage by the projections. The purpose is to provide a stirring capacity that is not inferior to that of the screw method, while having a simple form.

Another object of the present invention is to provide, in addition to the above configuration, a drain for discharging treated water dropped from a small hole in a drain plate, a control device for controlling timing of water spraying from a sprinkling pipe and operation timing of a driving mechanism. Equipped with stirring by a stirring body,
By dispersing the garbage by repeating the spraying and stopping of the water with the stirring stopped by the controller, the environment suitable for bacteria that degrade the garbage is maintained for 24 hours. An object of the present invention is to enable continuous operation, and to provide a garbage disposal apparatus having a sufficient garbage decomposition treatment capacity for business use.

[0013]

SUMMARY OF THE INVENTION In summary, the present invention (claim 1) provides a stirrer having a semi-cylindrical shape with a lower portion formed horizontally over the entire length in the horizontal direction and a bottom portion formed in an open state. A stirrer, a stirrer shaft rotatably supported by the stirrer, and a plurality of stirrers radially attached thereto, a drive mechanism for rotating and driving the stirrer shaft, and a number of small holes attached to cover the bottom. It is characterized by comprising a formed drainage plate, and a sprinkler pipe provided in the housing and formed with a large number of discharge ports for discharging water for spraying into the stirring tank.

Further, the present invention (claim 2) provides a stirring tank having a semi-cylindrical shape with a lower portion formed horizontally over the entire length in the horizontal direction and a bottom portion formed in an open state, the stirring tank being fixed in the housing. A stirrer shaft rotatably supported by a plurality of stirrers radially mounted thereon, a drive mechanism for rotating and driving the stirrer shaft, and a plurality of small holes formed so as to cover the bottom and having a plurality of small holes formed therein. The upper part of the drain is provided with a drainage plate formed to project from an annular jetty, and a sprinkler pipe provided in the housing and formed with a number of discharge ports for discharging water for spraying into the stirring tank. It is characterized in that the small hole of the plate is not clogged by the annular jetty.

The present invention (Claim 3) provides a stirring tank having a semi-cylindrical shape with a lower portion formed horizontally over the entire length in the horizontal direction and a bottom portion formed in an open state, and the stirring tank. A stirrer shaft rotatably supported by a stirrer having a plurality of protrusions formed on the surface and a stirrer radially attached;
A drive mechanism for rotating and driving the stirring shaft, a drain plate attached to cover the bottom and formed with a large number of small holes, and an upper periphery of the small holes is formed to project from an annular jetty;
A sprinkler pipe provided in the housing and having a number of discharge ports for discharging water for spraying into the stirring tank, and configured such that the small holes of the drainage plate are not clogged by the annular ridge. The structure is such that the ability to stir the garbage by the stirrer is increased by the projections.

Further, the present invention (claim 4) provides a stirring tank which is horizontally fixed in a housing, a lower part of which is formed in a semi-cylindrical shape over the entire length in the horizontal direction, and a bottom part of which is formed in an open state; A stirrer shaft rotatably supported by a stirrer having a plurality of protrusions formed on the surface and a stirrer radially attached;
A drive mechanism for rotating and driving the stirring shaft, a drain plate attached to cover the bottom and formed with a large number of small holes, and an upper periphery of the small holes is formed to project from an annular jetty;
A drain for discharging treated water dropped from the small hole of the drain plate, a water spray pipe provided with a plurality of discharge ports for discharging water for spraying into the stirring tank, which is disposed in the housing, and A control device for controlling the timing of water spraying and the operation timing of the drive mechanism, so that the small holes of the drainage plate are not clogged by the annular jetty, and the garbage stirring ability of the garbage by the stirrer by the convex portion. The agitation by the stirrer, the spraying of water in a state where the stirring is stopped and the entire stop are repeated by the control device to decompose the garbage. is there.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. The garbage processing apparatus 1 according to the present invention comprises a stirring tank 2, a stirring shaft 3, a driving mechanism 4, a drain plate 5, a drain 6, a water sprinkling pipe 8, a control device 9 And

The stirring tank 2 is, as shown in FIGS.
The lower part 2a is horizontally fixed in the housing 10, and the lower part 2a is formed in a semi-cylindrical shape over the entire length in the horizontal direction.
Are formed in an open state, for example, a stainless steel plate is assembled by welding.

The left and right side surfaces 2c are formed as flat vertical surfaces, and the bottom portion 2b is cut out over the entire length in the horizontal direction, and the drain plate 5 is attached to the bottom portion 2b. The upper part 2d of the stirring tank 2 is completely open so that garbage 11 can be introduced from above.

The stirring shaft 3 is rotatably supported by the stirring tank 2 and has a plurality of projections 13 formed on the surface 12a.
Numeral 2 is a round bar of stainless steel, for example, which is radially mounted, and as shown in FIGS. 2 to 5, is rotatably supported by bearing blocks 14 mounted on the left and right side surfaces 2c of the stirring tank 2, respectively. . A keyway (not shown) is formed in each of the portions of the stirring shaft 3 to which the stirring body 12 is attached.

The stirring body 12 is made of, for example, stainless steel (SU).
S304), and as shown in FIGS. 2 to 5,
The protrusions 13 on the surface 12a may be formed by, for example, rivets, screws, beads by welding, forging, or the like. Stirrer 1
2 is a through-hole 15a through which the stirring shaft 3 can pass and a keyway 1
For example, on the outer peripheral surface 15c of the boss 15 on which the
Three can be attached at 20 ° intervals.
The three bosses 15 to which three stirring bodies 12 are attached are attached to the stirring shaft 3 at regular intervals, for example, five sets. Each boss 15 is prevented from rotating by a key 17 and a screw 16 is fastened to each key 17 so that the boss 15 does not shift in the axial direction of the stirring shaft 3.

In this embodiment, as shown in FIG. 4, the angular positions of the stirrers 12 attached to the respective bosses 15 are the same in all five sets. However, the present invention is not limited to this. The angle position of the body 12 may be changed little by little, for example, it may be arranged in a spiral shape.

The drive mechanism 4 is for driving the stirring shaft 3 to rotate. As shown in FIGS. 1 to 3 and 9, an electric motor 18 having a built-in speed reduction mechanism is mounted in the housing 10. , The rotating shaft 19 of the electric motor 18 and the stirring shaft 3
Pulleys 20 and 21 are attached to the shaft ends of
The winding transmission member 22 is wound around 0 and 21, and is controlled by the control device 9 to rotate or stop the stirring shaft 3.

The drainage plate 5 is attached so as to cover the bottom 2b of the stirring tank 2, has a number of small holes 5a formed therein, and the upper periphery of the small holes 5a is formed to protrude into an annular ridge 5b. Then, as shown in FIGS. 4 and 6 to 8, for example, a plurality of small holes 5a having a diameter of 1 mm are respectively burred to form a jetty 5b having a height of about 0.2 mm.

The small holes 5a are arranged in a staggered pattern as shown in FIG. 8, and the pitch P is, for example, 1 mm. Therefore, the small hole 5a shown in FIG. 4 and FIG. 6 to FIG.
It is drawn in an enlarged manner so that its shape is clear, and the actual small hole 5a is very small. The small holes 5a are formed small in this way in order to allow only the treated water 23 generated by the decomposition of the garbage 11 to pass through, and to prevent the undecomposed garbage 11 from passing through.

The drain 6 is for discharging the treated water 23 dropped from the small hole 5a of the drain plate 5, and as shown in FIGS. 2 and 3, 9 and 10, A water collecting portion 24 attached to cover the drainage plate 5 attached to 2b from below, and connected to the water collecting portion 24;
A drain pipe 25 for flowing treated water 23 dropped to the water collecting section 24 to the outside.

The bottom surface 24a of the water collecting part 24 is inclined so that the treated water 23 flows in one direction, and a drain pipe 25 is connected to the lowest position.

The water sprinkling pipe 8 is provided in the housing 10 and is provided with a large number of discharge ports 8a for discharging water 26 for spraying into the stirring tank 2, and is shown in FIGS. As shown in FIGS. 9 and 11, the joint 28 is connected horizontally to the both ends 8b of the housing 10 and the left and right inner surfaces 10d of the housing 10, respectively. It is fixed to.

The configuration of the pipes up to the sprinkler pipe 8 will be described. As shown in FIGS. 2, 3, and 11, a connection port for connecting a water supply hose or the like (not shown) is provided on the back surface 10e of the housing 10. 29 is provided, and is connected to a solenoid valve 30 fixed by a bracket 35 in the housing 10 by a water guide pipe 31. A delivery pipe 32 is connected from the solenoid valve 30 to the left and right direction of the housing 10, and the outlet pipe 32 and the left and right joints 28 are connected to the left and right inner surfaces 10 of the housing 10.
They are connected to each other by pumping pipes 33 arranged vertically along d.

The diameter of the discharge port 8a of the sprinkler pipe 8 is, for example, 2
The discharge ports 8 are formed in a straight line every 20 mm, for example, and the direction of the discharge ports 8a is obliquely directed downward such that the water 26 is discharged to the center of the stirring tank 2. .

The control device 9 controls the timing of spraying water from the water sprinkling pipe 8 and the operation timing of the drive mechanism 4, and is installed in the housing 10 as shown in FIG. . The control device 9 is connected to the drive device 4 by wiring (not shown), and as shown in FIG.
They are connected to the solenoid valve 30 by a wiring 30a, and are controlled at a predetermined operation timing.

The housing 10 is, as shown in FIGS.
A garbage input port 10b is formed on the upper surface 10a, and is opened and closed when the garbage is input into the input port 10b. For example, a lid 40 is attached via a hinge 38. A lock mechanism (not shown), a handle 41 and a damper 42 are attached to the lid 40 so that opening and closing can be performed easily and safely. The lid 40 is not limited to the hinge type, but may be a slide type.

FIGS. 1 and 2 show the front surface 10c of the housing 10.
As shown in FIG. 1, an operation panel 34 for operating the garbage disposal apparatus 1 is provided, and height-adjustable legs 3 are provided at four corners.
9 are attached respectively. The operation panel 34 includes:
For example, an operation switch 43, a stop switch 44, an operation display lamp 45, and an emergency stop button 47 are attached, and are electrically connected to the control device 9 by a wiring 36.
Of course, other than this, a display section for displaying the internal temperature of the stirring tank 2 or a counter for displaying the total operation time may be provided.

The present invention is configured as described above,
Hereinafter, the operation will be described. In FIGS. 1 and 9, water 26 is supplied from the connection port 29 in the direction of arrow G to the garbage processing apparatus 1, but while the garbage processing apparatus 1 is not operating. Since the solenoid valve 30 is completely closed, the water 26 is not sprayed from the discharge port 8a of the water spray pipe 8.

In FIG. 9, when the lock mechanism of the closed lid 40 is released, the damper 42 extends gently and the lid 4 is closed.
0 is opened in the direction of arrow A, so that the garbage 11 in the garbage box 46 is thrown into the stirring tank 2 from the inlet 10b in the direction of arrow C, and a bacterial material (not shown) responsible for decomposition of the garbage 11 is also provided. It is put into the stirring tank 2. The bacterial material is a mixture of rice husks where bacteria live, sap which can be collected from soft trees in general, and sap as a bait for the bacteria and buckwheat husks for preventing the rice husks from becoming rice bran or miso.

Next, when the cover 40 is closed in the direction of arrow B and locked, and then the operation switch 43 of the operation panel 34 is pressed, the operation display lamp 45 is turned on and the control device 9 is controlled by the control device 9 shown in FIG.
The operation starts based on the timing chart 48 shown in FIG.
Is rotated in the direction of arrow D for 180 seconds. The horizontal axis of the timing chart 48 is the time axis, and the unit is seconds.

As a result, the pulley 20 also rotates in the direction of arrow D, and circulates the wrapping transmission member 22 in the direction of arrow E. The wrapping transmission member 22 moves the pulley 21 of the stirring shaft 3 in an arrow F direction.
, The stirring shaft 3 is also moved with the arrow F
Then, the stirring body 12 stirs the garbage 11 in the stirring tank 2. Since the stirrer 12 is formed with the convex portion 13, it is possible to stir the garbage 11 efficiently.

After 180 seconds, the electric motor 18 stops, and FIG.
As shown in the chart 48b of FIG.
0 is opened and the water 26 is sent to the sprinkling pipe 8 in the direction of arrow H, and the water 26 is sprayed into the stirring tank 2 from the discharge port 8a in the direction of arrow I for 5 seconds. After 5 seconds, the electromagnetic valve 30 is closed and the spraying of the water 26 is stopped, and the stopped state in which neither the stirring nor the water spraying is performed continues for 180 seconds. After 180 seconds, stirring starts again,
Thereafter, the above operation is repeated. Garbage disposal device 1
By operating for 24 hours, 100 kg of garbage 11 can be processed per day.

Bacteria in bacterial material (not shown)
Is supplied with water 26 appropriately in this way, and
Activates when 1 is present, and enhances the decomposition action.
As shown in FIG. 10, the garbage 11 is decomposed by the action of the bacteria until it becomes treated water 23, and the treated water 23 drops from the small holes 5 a of the drain plate 5 to the water collecting part 24 of the drain 6. Egg shells and fish bones as well as soft ones such as vegetables, cereals, and meat can be decomposed. However, it is necessary to remove thick bones such as cows and pigs in advance.

The garbage that has not been decomposed at this time 1
1 is still too large to enter the small hole 5a, and the garbage 11 which has been considerably decomposed due to decomposition is also blocked by the jetty 5b formed around the upper portion of the small hole 5a. The water 26 and the treated water 23 do not accumulate excessively in the stirring tank 2 due to clogging.

That is, only the treated water 23 can pass through the small hole 5a, and the treated water 23 discharged from the water collecting part 24 to the outside through the drain pipe 25 is, as shown in Table 1, the waste water related to the living environment. It satisfies the standard and can be drained to a sewer or the like (not shown). Table 1 shows garbage 1
1 is an analysis of the treated water 23 generated as a result of performing the decomposition process for 3 hours based on the timing chart 48 of FIG.

[0042]

[Table 1]

[0043]

According to the present invention, there is provided a stirring tank having a semi-cylindrical shape having a lower portion formed horizontally over the entire length in the horizontal direction and a bottom portion formed in an open state as described above, A stirrer shaft rotatably supported by a plurality of stirrers radially mounted thereon, a drive mechanism for rotating and driving the stirrer shaft, and a drainage plate mounted to cover the bottom and formed with a number of small holes. Since it is provided in the housing and with a watering pipe formed with a large number of discharge ports for discharging water for spraying in the stirring tank, water can be sprayed on garbage in the stirring tank, There is an effect that the bacteria that decompose the garbage are activated and the ability to decompose the garbage can be dramatically increased.

Further, in addition to the above-described structure, the upper periphery of the small hole of the drainage plate is formed so as to protrude into an annular jetty to prevent clogging of the small hole with the garbage being decomposed. This has the effect that it can be discharged smoothly out of the agitation tank, and as a result, water does not stay in the agitation tank and bacteria are not killed. There is.

Further, in addition to the above configuration, a large number of convex portions are formed on the surface of the stirrer, and the convex portions increase the ability of the stirrer to stir garbage. In spite of this, there is an effect that an agitation capacity comparable to that of the screw method can be obtained.

Further, in addition to the above-mentioned structure, a stirrer is provided with a drain for discharging the treated water dropped from the small hole of the drain plate, and a control device for controlling the timing of water spraying from the water spray pipe and the operation timing of the driving mechanism. The garbage is decomposed by repeating the agitation, dispersal of water in a state where the agitation is stopped, and the entire stoppage by the control device, so that an environment suitable for bacteria that degrade garbage is maintained. This has the effect of enabling continuous operation for a long period of time, and as a result, has the effect of providing a garbage disposal apparatus having sufficient garbage decomposition treatment capacity for business use.

[Brief description of the drawings]

FIG. 1 is a perspective view of a garbage processing apparatus.

FIG. 2 is a vertical sectional view of the garbage processing apparatus viewed from a right side.

FIG. 3 is a longitudinal sectional view of the garbage processing apparatus as viewed from the front.

FIG. 4 is a partially cutaway perspective view showing an attached state of a stirrer and an agitating shaft and an attached state of a drain plate at the bottom of an agitating tank.

FIG. 5 is a partially cutaway perspective view showing a state where the agitator is attached to the boss and a screw for fixing the boss.

FIG. 6 is a partially cutaway perspective view showing a state where a drain plate at the bottom of the stirring tank is attached.

FIG. 7 is an enlarged vertical sectional view of a drain plate.

FIG. 8 is an enlarged perspective view of a main part of a drain plate.

FIG. 9 is a vertical cross-sectional view of the garbage processing apparatus, as viewed from the right side, showing the state of input of garbage and the operating state of the garbage processing apparatus.

FIG. 10 is an enlarged vertical sectional view of a main part showing a state where treated water generated by decomposition of garbage drops through a small hole of a drainage plate and drops into a water collecting part.

FIG. 11 is a partially broken perspective view showing a pipe from the water guide pipe to the solenoid valve and a pipe from the solenoid valve to the sprinkler pipe.

FIG. 12 is a diagram showing timings of stirring and water spraying by the control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Garbage processing apparatus 2 Stirring tank 2a Lower part 2b Bottom part 3 Stirring shaft 4 Driving mechanism 5 Drain plate 5a Small hole 5b Jetty 6 Drain 8 Sprinkler tube 8a Discharge port 9 Control device 10 Housing 11 Garbage 12 Stirrer 12a Surface 13 Convex part 23 treated water 26 water

Claims (4)

[Claims] 1. A stirring tank which is horizontally fixed in a housing, has a lower part formed in a semi-cylindrical shape over the entire length in the horizontal direction, and has a bottom formed in an open state, and is rotatably supported by the stirring tank. A stirrer shaft having a plurality of stirrers radially mounted thereon, a drive mechanism for rotating and driving the stirrer shaft, a drainage plate mounted to cover the bottom and having a large number of small holes, and disposed in the housing; A sprinkler pipe formed with a number of discharge ports for discharging water for spraying into the stirring tank. 2. A stirring tank which is fixed horizontally in a housing, has a lower part formed in a semi-cylindrical shape over the entire length in the horizontal direction, and has a bottom formed in an open state, and is rotatably supported by the stirring tank. A stirrer shaft having a plurality of stirrers radially attached thereto, a drive mechanism for rotating and driving the stirrer shaft, and a plurality of small holes formed so as to cover the bottom and having an annular shape around the top of the small holes; A drain plate protrudingly formed on the jetty, and a sprinkler pipe provided in the housing and formed with a large number of discharge ports for discharging water for spraying into the stirring tank, wherein the small hole of the drain plate is provided. Is configured not to be clogged by the annular jetty. 3. A stirring tank having a semi-cylindrical shape with a lower portion formed horizontally over the entire length in a horizontal direction and a bottom portion formed in an open state, and a rotatably supported pivotally by the stirring tank. A stirrer shaft with a stirrer having a number of convex portions formed on the surface is radially mounted, a drive mechanism for rotating and driving the stirrer shaft, and a number of small holes formed and attached so as to cover the bottom portion, and A drainage plate formed by projecting an annular ridge around the top of the small hole, and a sprinkler pipe provided in the housing and formed with a number of discharge ports for discharging water for spraying into the stirring tank. And wherein the small holes of the drainage plate are configured not to be clogged by the annular ridge, and the convex portions are configured to increase the stirring ability of the garbage by the stirring body. Waste treatment equipment. 4. A stirring tank having a semi-cylindrical shape with a lower portion formed horizontally over the entire length in the horizontal direction and a bottom portion formed in an open state, and rotatably supported by the stirring tank. A stirrer shaft with a stirrer having a number of convex portions formed on the surface is radially mounted, a drive mechanism for rotating and driving the stirrer shaft, and a number of small holes formed and attached so as to cover the bottom portion, and A drainage plate formed by projecting an annular ridge around the top of a small hole, a drain for discharging treated water dropped from the small hole of the drainage plate, and a sprinkler disposed in the housing and sprayed into the stirring tank. A sprinkler pipe formed with a number of discharge ports for discharging water, and a control device for controlling timing of spraying water from the sprinkler pipe and operation timing of the driving mechanism, wherein the small hole of the drainage plate is Eye due to annular jetty In addition to being configured so as not to be clogged, the convex portion is configured to increase the stirring ability of the garbage by the stirring body, and the stirring by the stirring body, the spraying of the water in a state where the stirring is stopped, and a total stoppage Wherein the control device is configured to repeatedly decompose the garbage.