JPH1157668A - Raw refuse treating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a raw refuse treating apparatus wherein a clarification apparatus can be miniaturized without necessity of designing the treating capacity of the clarification apparatus with respect to a large amt. of odorant gas generated temporarily and with high concn. and needless consumption of energy can be suppressed. SOLUTION: A decomposition treating chamber 1 for decomposition treatment of raw refuse with microorganisms, an air suction passage 2 for taking open air into the decomposition treating chamber 1, an air vent passage 3 for exhausting air in the decomposition treating chamber 1 to the outside, a clarification device 4 provided in the air vent passage 3 and for clarifying odorant gas included in the air passing through the air vent passage 3 and an open air taking-in passage 5 connected to the air vent passage 3 on the downstream side of the clarification device 4 and introducing open air into the air vent passage, are provided. In addition, a controlling part 6 for controlling the amt. of introduction of open air so as to increase and decrease it from the open air taking-in passage 5 to the air vent passage 3 for a specified time with respect to the time when the raw refuse is fed into the decomposition treating chamber 1, is provided.

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 for decomposing garbage, and more particularly, to purifying odor gas generated during the processing of garbage.

[0002]

2. Description of the Related Art A bio-based garbage disposal apparatus for decomposing garbage by microorganisms has been known (see Japanese Patent Publication No. 2-10398 and Japanese Patent Publication No. 2-30760). In this bio-type garbage disposal apparatus, garbage is put into a decomposition treatment chamber having a treatment material containing microorganisms that decompose garbage, and the garbage is decomposed by microorganisms in the decomposition treatment chamber. . In order to decompose garbage in the decomposition processing chamber in this way, it is necessary to provide air for microorganisms to breathe and survive, and it is necessary to evaporate and remove water contained in the garbage. For this purpose, the decomposition processing chamber is provided with an intake path for taking in outside air into the decomposition processing chamber, and an exhaust path for discharging the air of the decomposition processing chamber to the outside. The outside air is sent into the decomposition processing chamber, and the air in the decomposition processing chamber is sent out and discharged from the exhaust path.

In such a bio-based garbage disposal apparatus, nitrogen compounds such as ammonia and amines such as trimethylamine, sulfur compounds such as methyl sulfide, methyl mercaptan and methyl disulfide, , Alcohols such as methanol and ethanol, and various other odorous gases. When these odorous gases are exhausted through the exhaust path, these gases become odor sources such as irritating odor and putrid odor, so that a purifying device is provided in the exhaust path to purify the exhaust air,
The stench is prevented from leaking to the outside.

[0004]

The purifying apparatus includes a method of removing an odor using a gas adsorbent and a deodorant (see Japanese Patent Application Laid-Open No. H8-24830, etc.), and a method using an oxidation catalyst and ozone. (Japanese Unexamined Patent Publication No. 7-3985)
However, in the garbage disposal apparatus, the odorous gas may be temporarily discharged at a high concentration and a large flow rate, and thus has various problems in the design of the purification apparatus. .

That is, the odor gas discharged from the decomposition processing chamber of the garbage disposal apparatus is relatively small immediately after the garbage is introduced into the decomposition processing chamber, and thereafter increases in a large amount for a specific period. It fluctuates to a very small amount. Also, when a stirrer is provided in the decomposition processing chamber, the processing material containing microorganisms and the garbage are periodically stirred to efficiently supply air to the microorganisms and remove moisture in the garbage. At the time of stirring by the stirrer, the odor gas trapped in the mixture of the processing material and the garbage is released and discharged in large quantities. As described above, in the garbage disposal apparatus, a large amount of odorous gas is generated at a high concentration even temporarily, and therefore, the treatment capacity of the purification apparatus needs to be designed based on the odorous gas having a high concentration and a large flow rate. In addition, problems such as an increase in the size of the purification device and wasteful consumption of energy occur.

For example, in a purifying apparatus using an adsorbent such as activated carbon, a large amount of adsorbent is required to adsorb a large amount of odorous gas at a high concentration, and the purifying apparatus becomes very large. However, there are practical problems such as a shortened life and an increased frequency of replacement of the adsorbent. Further, in a purification device using an oxidation catalyst, the oxidation catalyst does not have a deodorizing effect at room temperature, so it is necessary to heat it to 100 ° C. or more to obtain a good deodorizing effect, and the deodorizing effect increases as the temperature increases. Become. Also, the lower the space velocity of the air passing through the oxidation catalyst (air flow rate / volume of the oxidation catalyst), the higher the air velocity.
For this reason, in order to decompose a large amount of high-concentration odor gas, it is necessary to heat the oxidation catalyst at a high temperature. Becomes extremely bad. Further, if the volume of the oxidation catalyst is increased in order to decompose a large amount of odorous gas having a high concentration, there is a problem that the purifier becomes very large.

[0007] Further, in a purifying apparatus utilizing ozone, in order to decompose a large amount of odorous gas having a high concentration, it is necessary to increase the ozone generation concentration and further use a large amount of an ozone decomposition catalyst. There is a problem that the device becomes very large. As described above, when the processing capacity of the purifying device is designed on the basis of the odor gas temporarily generated at a high concentration and a large amount, the purifying device becomes large, and energy is wasted when a small amount of the odor gas is generated. Had the problem that

The present invention has been made in view of the above points, and there is no need to design the treatment capacity of a purification device based on odorous gas generated temporarily in a large amount at a high concentration. It is an object of the present invention to provide a garbage disposal apparatus that can reduce wasteful consumption of energy.

[0009]

According to a first aspect of the present invention, there is provided a garbage disposal apparatus comprising: a decomposition processing chamber 1 for decomposing garbage by microorganisms; an intake path 2 for taking outside air into the decomposition processing chamber 1; An exhaust path 3 for discharging the air in the decomposition processing chamber 1 to the outside, a purifying device 4 provided in the exhaust path 3 for purifying odorous gas contained in air passing through the exhaust path 3, and a downstream side of the purifying device 4. And an external air intake path 5 that is connected to the exhaust path 3 and introduces outside air into the exhaust path 3, and from the external air intake path 5 to the exhaust path 3 for a predetermined time based on the time when garbage is introduced into the decomposition processing chamber 1. And a control section 6 for controlling the amount of outside air introduced to increase or decrease.

The garbage disposal apparatus according to claim 2 of the present invention is a decomposition processing chamber 1 for decomposing garbage by microorganisms.
An intake path 2 for taking in outside air into the decomposition processing chamber 1; an exhaust path 3 for discharging the air in the decomposition processing chamber 1 to the outside; and an odor contained in the air provided in the exhaust path 3 and passing through the exhaust path 3. A purifying device 4 for purifying the gas, an external air intake passage 5 connected to the exhaust passage 3 downstream of the purifying device 4 and introducing outside air into the exhaust passage 3, and a treatment material containing microorganisms in the decomposition treatment chamber 1. A stirrer 7 for stirring garbage;
A control unit 6 for controlling the amount of outside air introduced from the outside air intake path 5 to the exhaust path 3 to be increased or decreased for a predetermined time based on the operation of the stirring device 7. .

Further, the garbage disposal apparatus according to claim 3 of the present invention provides a decomposition processing chamber 1 for decomposing garbage with microorganisms.
An intake path 2 for taking in outside air into the decomposition processing chamber 1; an exhaust path 3 for discharging the air in the decomposition processing chamber 1 to the outside; and an odor contained in the air provided in the exhaust path 3 and passing through the exhaust path 3. A purifying device 4 for purifying gas, an external air intake passage 5 connected to the exhaust passage 3 downstream of the purifying device 4 and introducing outside air into the exhaust passage 3, and an odor between the decomposition treatment chamber 1 and the exhaust passage 3. Ammonia sensor 16 for sensing the amount of ammonia in the gas, and control for increasing or decreasing the amount of outside air introduced from outside air intake path 5 to exhaust path 3 when the ammonia sensor 16 detects a predetermined amount of ammonia. And a unit 6.

[0012]

Embodiments of the present invention will be described below. FIG. 1 shows an example of an embodiment of a garbage disposal apparatus according to the first aspect of the present invention. A processing material 10 in which microorganisms for decomposing garbage are propagated is provided at the bottom of a decomposition processing chamber 1.
Has been stored. A stirring device 7 is provided at the bottom in the decomposition processing chamber 1 so that the garbage and the processing material 10 introduced into the decomposition processing chamber 1 can be mixed with stirring.

The decomposition processing chamber 1 has an intake path 2 and an exhaust path 3
Are connected, and a ventilation fan 11 is provided in the intake path 2. By the operation of the ventilation fan 11, outside air is introduced into the decomposition processing chamber 1 through the intake path 2, and the air in the decomposition processing chamber 1 is discharged through the exhaust path 3 with the introduction of the outside air. . A purification device 4 is provided in the exhaust path 3. In the embodiment of FIG.
Deodorizing catalyst unit 1 using an oxidation catalyst arranged in exhaust path 3
2 and a heating unit 13 disposed in the exhaust passage 3 adjacent to the upstream side (upwind side) of the deodorizing catalyst unit 12, and the air exhausted through the exhaust passage 3 is heated by the heating unit 1.
3 to heat to a high temperature.
By contacting with the exhaust gas 2, the odorous components contained in the exhaust air are oxidized and deodorized. Deodorizing catalyst section 12
As the oxidation catalyst used in the above, a catalyst in which a transition metal or a metal oxide having oxidation performance is supported on a carrier can be used. Examples of the carrier include silica-titania, silica-alumina, cordierite, zeolite, activated alumina, activated carbon and the like.
Platinum is the best transition metal, but gold,
Silver, copper, palladium, ruthenium, rhodium and the like can also be used. Examples of the metal oxide include nickel oxide, manganese oxide, cobalt oxide, iron oxide, and copper oxide.

An outside air intake path 5 is connected to the exhaust path 3 on the downstream side (downwind side) of the purification device 4. The outside air intake path 5 is provided with an outside air introduction fan 14. By operating the outside air introduction fan 14, the outside air is passed through the outside air introduction path 5 and the purification device 4 of the exhaust path 3.
It is designed to be taken in downstream from. The outside air introduction fan 14 is connected to a control unit 6 having a built-in CPU and the like. The control unit 6 controls the rotation speed of the outside air introduction fan 14 so that the outside air flows from the outside air intake path 5 to the exhaust path. Can be increased or decreased.

The control section 6 is connected to a determination section 15 which detects the input of the garbage into the decomposition processing chamber 1 and determines the elapsed time from the input of the garbage. The determination unit 15 is a CPU
The detection of garbage input by the determination unit 15 is performed, for example, by providing a lid (not shown) in the garbage input opening of the decomposition processing chamber 1 and opening and closing the lid. The detection can be performed by the determination unit 15 and the time when the lid is closed after the lid is opened is determined as the time when the garbage is put.

In the garbage disposal apparatus of the present invention formed as described above, when the garbage introduced into the decomposition treatment chamber 1 is mixed with the treatment material 10, the microorganisms propagated in the treatment material 10 The garbage is multiplied using the garbage as a nutrient source to decompose the garbage. As a result of the decomposition of garbage, water, carbon dioxide, and ammonia are mainly produced in the decomposition processing chamber 1, and nitrogen compounds such as amines such as trimethylamine, sulfur compounds such as methyl sulfide, methyl mercaptan, and methyl disulfide are also generated. Compounds, aldehydes, alcohols such as methanol and ethanol, and various other odor gases are generated, and these gases are sources of bad odors such as pungent odor and putrid odor.

Here, in the decomposition processing chamber 1, outside air is required for respiration of microorganisms in the processing material 10, and the water originally contained in the raw garbage and the water generated by the decomposition of the raw garbage are
Since the amount of water in the mixture of the processing material 10 and the garbage becomes excessive and the microorganisms do not work effectively, it is necessary to remove this water and adjust the water content appropriately. For this purpose, the ventilation fan 11 is constantly operated to introduce outside air into the decomposition processing chamber 1 through the intake path 2 and to simultaneously operate the decomposition processing chamber 1.
The inside air is discharged to the outside through the exhaust path 3.

When the air in the decomposition processing chamber 1 is exhausted as described above, the odor gas contained in the air is exhausted through the exhaust path 3.
After being oxidized and deodorized by the deodorizing catalyst section 12 of the purification device 4 provided in the above, the exhaust gas is discharged from the outlet 3a of the exhaust path 3. At this time, the outside air introduction fan 14 is also constantly operating, and the outside air is introduced into the exhaust path 3 at a location downstream of the purification device 4 through the outside air intake path 5, and the outside air is supplied to the air passing through the purification device 4. The mixture is discharged from the outlet 3a in a mixed state. By introducing the outside air into the exhaust path 3 through the outside air intake path 5 in this way, even if the odor gas in the air discharged from the decomposition processing chamber 1 is not completely removed by the purification device 4, the odor can be reduced by the outside air. The gas can be diluted and discharged, and the odor concentration can be reduced to discharge as air without odor.

Here, the odor gas discharged from the decomposition processing chamber 1 of the garbage processing apparatus is relatively small immediately after the garbage is introduced into the decomposition processing chamber 1, and thereafter, the odor gas having a high concentration is discharged for a specific period. Occurs in large quantities and then decreases to relatively small quantities. For this reason, if the temperature of the heating unit 13 of the purification device 4 is set to a high temperature at the time when a large amount of odorous gas of high concentration is generated, the temperature energy of the heating unit 13 is wasted when the large amount of odorous gas is not generated. And energy efficiency is reduced. Therefore, according to the first aspect of the present invention, the heating unit 13 is set at a temperature corresponding to the average amount of odor gas generated. Then, the determination unit 15 detects the input of the garbage into the decomposition processing chamber 1 and determines the elapsed time from the input of the garbage, outputs the determination result to the control unit 6, and outputs a large amount of the high-concentration odor gas. During the period of time during which the odor gas is generated, the number of rotations of the outside air introduction fan 14 is increased to increase the amount of outside air introduced into the exhaust path 3 through the outside air intake path 5, and a large amount of high concentration odor gas is generated in the decomposition processing chamber. Even if the odor gas is exhausted from 1 and is not sufficiently removed by the purifying device 4, this odor gas is diluted with a large amount of outside air, and is exhausted from the exhaust port 3a of the exhaust path 3 as air having a concentration low enough to not smell. I can do it. For example, the control unit 6 increases the flow rate of the outside air introduced from the outside air intake path 5 to the exhaust path 3 for 11 hours after one hour has passed since the detection of the input of the garbage into the decomposition processing chamber 1. It is controlled by.

As described above, by increasing the flow rate of the outside air introduced from the outside air intake path 5 to the exhaust path 3 only during the time when a large amount of the high concentration odor gas is discharged, the high concentration odor gas is temporarily Can solve the problem of odor when a large amount of gas is discharged, and therefore the purifying device 4 can be solved.
It is not necessary to set the heating temperature of the heating unit 13 to a high temperature, and the energy efficiency does not decrease, and it is not necessary to use a large amount of the catalyst of the deodorizing catalyst unit 12 of the purification device 4. In addition, it is not necessary to increase the size of the purification device 4.

FIG. 2 shows an example of an embodiment of the garbage disposal apparatus according to the second aspect of the present invention. In this embodiment, a heating unit 13 of a purification device 4 is provided outside the exhaust path 3. The heating unit 13 heats the deodorizing catalyst unit 12. The stirrer 7 is operated at a predetermined time interval for a predetermined time, and the determination unit 15 detects the operation of the stirrer 7 to make a determination, and outputs the determination result to the controller 6 to output the determination result to the controller 6. The number of rotations of the outside air introduction fan 14 is increased for a predetermined time based on the operation of Step 7 to increase the amount of outside air introduced into the exhaust path 3 through the outside air intake path 5.

Here, when the processing material 10 containing microorganisms and the garbage are agitated by the stirrer 7, the odor gas trapped in the mixture of the processing material 10 and the garbage at the time of stirring is released and discharged in large quantities. Is done. If the temperature of the heating unit 13 of the purification device 4 is set to a high temperature at the time of stirring when a large amount of high-concentration odor gas is generated, a large amount of odor gas is generated without stirring by the stirring device 7. When it does not occur, the temperature energy of the heating unit 13 is wasted and energy efficiency is deteriorated. Therefore, claim 2
According to the invention, the heating unit 13 is set to a temperature corresponding to the average amount of odor gas generated. Then, the operation time of the stirring device 7 is determined by the determination unit 15, and the determination result is output to the control unit 6. And the amount of outside air introduced into the exhaust passage 3 through the outside air intake passage 5 is increased, and a large amount of high-concentration odor gas is discharged from the decomposition treatment chamber 1 and is not sufficiently removed by the purification device 4. In both cases, the odor gas is diluted with a large amount of outside air, and can be discharged from the exhaust port 3a of the exhaust path 3 as air having a concentration so low that no odor is felt. For example, after the stirring by the stirring device 7 is completed, the control unit 6 controls the flow rate of the outside air introduced from the outside air intake path 5 to the exhaust path 3 for 10 minutes.
Alternatively, when the stirrer 7 is operated periodically, for example, for 5 minutes every hour, an operation program of the stirrer 7 is input to the determination unit 15 in advance, and the operation of the stirrer 7 is started by the determination unit 15. The control unit 6 determines the result of the operation termination.
From the outside air intake path 5 to the exhaust path 3, for example, from 10 minutes before the start of operation of the stirrer 7 to 1 minute after the end of operation.
The control unit 6 is configured to increase the flow rate of the outside air introduced into the air conditioner.

As described above, the processing material 10 by the stirring device 7
By increasing the flow rate of the outside air introduced from the outside air intake path 5 to the exhaust path 3 only while a large amount of the high concentration odor gas is discharged due to the stirring of the garbage and the garbage, the large amount of the high concentration odor gas is temporarily It is possible to solve the problem of odor when exhausted to the exhaust gas, so that it is not necessary to set the heating temperature of the heating unit 13 of the purification device 4 to a high temperature,
Energy efficiency will not decrease,
Further, it is not necessary to use a large amount of the catalyst of the deodorizing catalyst section 12 of the purifying device 4, and it is not necessary to increase the size of the purifying device 4.

FIG. 3 shows an example of an embodiment of a garbage disposal apparatus according to the third aspect of the present invention.
From upstream to upstream of the purifier 4 in the exhaust path 3, detects the ammonia concentration in the air discharged from the decomposition processing chamber 1, and detects the amount of ammonia in the odor gas. It is like that. The data on the amount of ammonia detected by the ammonia sensor 16 is input to the determination unit 15 to determine whether the amount of ammonia exceeds a predetermined amount. And since a large amount of ammonia means that a high concentration of odor gas is discharged in large quantities, when the amount of ammonia exceeds a prescribed amount,
This determination result is output to the control unit 6, and the outside air introduction fan 1
4, the number of rotations is increased to increase the amount of outside air introduced into the exhaust path 3 through the outside air intake path 5, and a large amount of high-concentration odor gas is discharged from the decomposition processing chamber 1 for purification. Even if the odor gas is not sufficiently removed by the device 4, the odor gas can be diluted with a large amount of outside air so that the odor gas can be exhausted from the exhaust port 3a of the exhaust path 3 as air having a concentration low enough to not smell. is there.

As described above, while the amount of ammonia in the odor gas discharged from the decomposition processing chamber 1 is large and the high-concentration odor gas is discharged in large quantities, the outside air introduced from the outside air intake passage 5 to the exhaust passage 3 is discharged. By increasing the flow rate of odor, it is possible to solve the problem of odor when a large amount of odorous gas having a high concentration is temporarily discharged. Therefore, the heating temperature of the heating unit 13 of the purification device 4 can be increased. And the energy efficiency does not decrease. In addition, it is not necessary to use a large amount of the catalyst of the deodorizing catalyst section 12 of the purifying device 4, and the purifying device 4 needs to be enlarged. Is lost.

[0026]

As described above, the garbage disposal apparatus according to claim 1 of the present invention comprises a decomposition processing chamber for decomposing garbage by microorganisms, an intake path for taking in outside air into the decomposition processing chamber,
An exhaust path for discharging air in the decomposition processing chamber to the outside, a purifying device provided in the exhaust path for purifying odorous gas contained in air passing through the exhaust path, and connected to the exhaust path on a downstream side of the purifying device; A control to increase or decrease the amount of outside air introduced from the outside air intake path to the exhaust path for a predetermined period of time based on the outside air intake path for introducing outside air to the exhaust path and the time when garbage is introduced into the decomposition processing chamber. The odorous gas discharged from the decomposition treatment chamber is generated in a large amount at a high concentration during a specific period after the garbage is put into the decomposition treatment room. Only during the occurrence of this, the control unit can control so as to increase the amount of outside air introduced into the exhaust path through the outside air intake path. Even if not removed, Odor gas can be diluted with a large amount of outside air, and can be discharged from the exhaust path as air having a concentration low enough to not smell.Therefore, there is no need to set the heating temperature of the purification device to a high temperature. It can prevent energy efficiency from decreasing,
This eliminates the need to increase the size of the purification device.

Further, the garbage disposal apparatus according to claim 2 of the present invention comprises a decomposition processing chamber for decomposing garbage by microorganisms, an intake path for taking in outside air into the decomposition processing chamber, and an air in the decomposition processing chamber to the outside. An exhaust path for discharging, a purifying device provided in the exhaust path for purifying odorous gas contained in air passing through the exhaust path, and an outside air connected to the exhaust path downstream of the purifying apparatus and introducing outside air into the exhaust path. An intake path, a stirrer for stirring the processing material containing microorganisms and garbage in the decomposition processing chamber, and increasing or decreasing the amount of outside air introduced from the outside air intake path to the exhaust path for a predetermined time based on the operation of the stirrer. And a control unit for controlling
A large amount of high-concentration odor gas is generated when the processing material and garbage are stirred by the stirrer, but only during the time when the high-concentration odor gas is generated in large amounts, the outside air introduced into the exhaust path through the outside air intake path. It can be controlled by the control unit to increase the amount, and even if a high concentration of odor gas is discharged in large amounts and is not sufficiently removed by the purification device, this odor gas is diluted with a large amount of outside air to reduce the odor. It can be exhausted from the exhaust path as air having a concentration that is so low that it is not felt, so that it is not necessary to set the heating temperature of the purification device to a high temperature, and it is possible to prevent energy efficiency from decreasing, This eliminates the need to increase the size of the purification device.

Further, the garbage disposal apparatus according to claim 3 of the present invention comprises a decomposition processing chamber for decomposing garbage by microorganisms, an intake path for taking in outside air into the decomposition processing chamber, and an air in the decomposition processing chamber to the outside. An exhaust path for discharging, a purifying device provided in the exhaust path for purifying odorous gas contained in air passing through the exhaust path, and an outside air connected to the exhaust path downstream of the purifying apparatus and introducing outside air into the exhaust path. An intake path, an ammonia sensor for detecting the amount of ammonia in the odor gas between the decomposition treatment chamber and the exhaust path, and an external air from the external air intake path to the exhaust path when the ammonia sensor detects a predetermined amount of ammonia. And a control unit that controls so as to increase or decrease the amount of introduction, only while the amount of ammonia and the high concentration of odor are discharged in large amounts,
The control unit can control so as to increase the amount of outside air introduced into the exhaust path through the outside air intake path, and even if a large amount of high-concentration odor gas is exhausted and not sufficiently removed by the purification device, this control can be performed. Odor gas can be diluted with a large amount of outside air, and can be discharged from the exhaust path as air having a concentration low enough to not smell.Therefore, there is no need to set the heating temperature of the purification device to a high temperature. It is possible to prevent the energy efficiency from being reduced, and it is not necessary to increase the size of the purification device.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a schematic sectional view showing one example of an embodiment of the invention according to claim 2;

FIG. 3 is a schematic sectional view showing an example of an embodiment of the invention according to claim 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decomposition processing chamber 2 Intake path 3 Exhaust path 4 Purification device 5 Outside air intake path 6 Control part 7 Stirrer 16 Ammonia sensor

Claims (3)

[Claims] 1. A decomposition processing chamber that decomposes garbage by microorganisms, an intake path that takes in outside air into the decomposition processing chamber, an exhaust path that discharges air in the decomposition processing chamber to the outside, and an exhaust path that is provided in the exhaust path. A purifier for purifying odorous gas contained in air passing through the purifier, an external air intake path connected to an exhaust path downstream of the purifier and introducing outside air to the exhaust path, A garbage disposal apparatus comprising: a control unit that controls the amount of outside air introduced from the outside air intake path to the exhaust path to increase or decrease for a predetermined time from the time of introduction. 2. A decomposition processing chamber for decomposing garbage by microorganisms, an intake path for taking in outside air into the decomposition processing chamber, an exhaust path for discharging air in the decomposition processing chamber to the outside, and an exhaust path provided in the exhaust path. A purifier that purifies odorous gas contained in air passing through the purifier, an external air intake path that is connected to an exhaust path downstream of the purifier, and introduces outside air into the exhaust path, and a treatment that includes microorganisms in the decomposition processing chamber. A stirrer that stirs the material and garbage; and a control unit that controls the amount of outside air to be introduced from the outside air intake path to the exhaust path for a predetermined time based on the operation of the stirrer. Garbage disposal device characterized by the above-mentioned. 3. A decomposition processing chamber for decomposing garbage by microorganisms, an intake path for taking in outside air into the decomposition processing chamber, an exhaust path for discharging air in the decomposition processing chamber to the outside, and an exhaust path provided in the exhaust path. A purifying device for purifying odorous gas contained in air passing through the purifier, an external air intake path connected to an exhaust path downstream of the purifying apparatus, and introducing outside air into the exhaust path, and a path between the decomposition processing chamber and the exhaust path. An ammonia sensor for sensing the amount of ammonia in the odor gas at
A garbage disposal apparatus comprising: a control unit that controls so as to increase or decrease the amount of outside air introduced from an outside air intake path to an exhaust path when an ammonia sensor detects a predetermined amount of ammonia.