JPH08197035A - Treatment of crude refuse and treating device therefor as well as excess moisture removing device - Google Patents

Abstract

PURPOSE: To make it possible to intentionally treat even crude refuse of any states in a large amt. and at a low cost as compared with a treatment amt. CONSTITUTION: The crude refuse mixed with fermentation bacteria delivered from a treating tank 5 into a hermetically closed treating duct 17 is moved to the discharge port side of a treating chamber by a belt conveyor while the crude refuse is heated and dried by applying the microwaves from a microwave generator 22 thereto. The discharge hot air discharged from this microwave generator 22 is simultaneously blasted into the treating chamber, where the excess heat is utilized. The smell and exhaust air are discharged by a deodorizing device 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating raw garbage by fermentation and ripening it so that it can be reused as an organic fertilizer, an apparatus therefor, and a residual water removing apparatus.

[0002]

2. Description of the Related Art Conventionally, waste containing moisture (eg, leftover food, vegetable scraps, fish roe, waste foods whose expiration date has expired) from households, food processing plants, restaurants, etc. is said to be raw garbage. There is known a method and an apparatus for treating raw garbage in a heated fermentation chamber in the presence of a fermenting bacterium in order to stir the raw garbage to form a fine powder. According to this conventional example, it takes a long time for raw garbage to become dry fine powder, and since it is a batch type, there is a problem that it is not possible to sufficiently cope with the ever-increasing raw garbage.

[0003]

In order to solve this problem, the applicant of the present invention divides dehydrated raw garbage into a plurality of pieces while heating and stirring them with a heating means consisting of a heater wire in the presence of a fermenting bacterium. We have proposed a method and apparatus for treating raw garbage, which is characterized in that it moves in one direction in the treatment tank to make it into a dry fine powder and then automatically discharges it. Although this processing method and apparatus can process a large amount of garbage, for example, 50
To treat a large amount of raw garbage from 100 tons to 100 tons, the cost required for heating is high, and the types are different,
In order to systematically treat a large amount of various garbage with various moisture contents at a relatively low cost, further development of a treatment method and apparatus was expected. An object of the present invention is to make it possible to systematically dispose of a large amount of raw garbage in any state and at a low cost in comparison with the processing amount.

[0004]

In the treatment method according to the present invention, raw garbage to which a fermentation bacterium has been added or raw garbage to which a fermentation bacterium has not been added is heated in a closed treatment chamber by applying microwaves. Then, while moving the treatment chamber to the outlet side while drying, to promote fermentation decomposition while removing a certain amount of water contained in raw garbage in the process of moving, for example, to treat the most desirable water content as an organic fertilizer Is. In the method for treating raw garbage according to the present invention, a microwave generator is used as a means for heating the raw garbage, and the microwave is applied to the raw garbage to heat and dry it. When the warm air of the exhaust gas discharged from the microwave generator is blown into the processing chamber during heating, the residual heat can be utilized. In the treatment method according to the present invention, a transporting means such as a belt conveyor or a stirrer is used to move the garbage containing the fermentation bacterium inside to the outlet side.

The processing apparatus according to the present invention comprises a sealed processing chamber and a microwave generation heating means for applying microwaves to the garbage in the processing chamber to heat and dry the garbage. In the microwave oscillating device, a plurality of wave generating / heating means are provided in the processing chamber along the moving direction of the garbage. In the processing apparatus according to the present invention, a sealed processing chamber provided with a conveying means for moving the raw garbage to which the fermentation bacterium has been added to the outlet side, and microwaves are applied to the raw garbage in the processing chamber. And a microwave oscillating device for heating and drying the microwave oven. The plurality of microwave oscillating devices are provided in the processing chamber along the moving direction of the garbage, and the microwave of the waveguide is provided. An irradiation port is opened toward the processing chamber, and an exhaust warm air pipe for blowing warm exhaust air exhausted from the microwave generator into the processing chamber is provided between the microwave oscillating device and the processing chamber. It has been done. A deodorizing device may be provided as the garbage processing device of the present invention so that exhaust gas and odors in the processing chamber can be discharged through the odor pipe. In the apparatus for treating food waste of the present invention, a fermenter and a sealed processing chamber provided internally with a conveying means for moving the food waste added with the fermenting bacteria sent from the fermenter to the outlet side. And a microwave oscillating device for heating and drying the garbage in the processing chamber by applying microwaves thereto, and the microwave oscillating device is provided in the processing chamber in a moving direction of the garbage. A plurality of microwave irradiation ports of the waveguide are opened toward the inside of the processing chamber, and hot exhaust air exhausted from the microwave generation device is provided between the microwave oscillation device and the processing chamber. An exhaust hot air pipe for blowing the air into the processing chamber is installed. As a device to be applied when the water content of raw garbage is high, a sealed processing chamber having a conveying means for moving the raw garbage to the outlet side is provided, and a microwave is applied to the raw garbage in the processing chamber. Microwave oscillating device for heating and drying by heating, and a fermentation tank for adding fermentative bacteria by adding dried garbage treated to a predetermined water content, and the microwave oscillating device, There may be a plurality of microwaves provided in the processing chamber along the moving direction of the garbage, and the microwave irradiation port of the waveguide may be opened toward the processing chamber. An exhaust hot air pipe for sending the exhaust hot air discharged from the microwave generator into the processing chamber is provided between the chamber and the chamber.

In the apparatus for removing residual moisture of raw garbage of the present invention, a sealed processing chamber provided with a conveying means for moving the raw garbage to the carry-out side, and a microwave for the raw garbage in the processing chamber. A microwave oscillating device for heating and drying by applying, and a deodorizing device are provided, and the microwave oscillating device is provided in plural along the moving direction of the garbage in the processing chamber, The microwave irradiation port of the waveguide is opened toward the inside of the processing chamber, and preferably the warm exhaust air exhausted from the microwave generator is blown into the processing chamber between the microwave oscillation device and the processing chamber. The deodorizing device has an odor pipe for exhausting exhaust gas and odors in the processing chamber through an intake fan. In the excess water removal device, the raw garbage processed is
It includes both raw garbage to which the fermentation bacterium has been added and raw garbage to which the fermentation bacterium has not been added. The raw garbage to be treated includes, in addition to the above-mentioned waste containing moisture from households, food processing plants, restaurants, etc., livestock manure, chicken manure, dehydrated sludge, and bark from wood factories.

[0007]

[Examples] A method of treating bark (discarded bark) and cow dung as raw garbage will be described. 1 to 3
As shown in (1), the previously crushed bark is quantitatively and continuously conveyed from the supply port of the bark supply device 1 to the hammer mill 8 using the belt conveyor 10a in the conveying duct 10 by the constant amount delivery device 1a, Therefore, the crushed bark is crushed, and the crushed bark is conveyed to the belt conveyor 11 in the transport duct 11.
It is carried into the stirring tank 9 using a. Cow dung is sent from the storage tank 2 and put into the stirring tank 9 by the device 2a. Next, the cow dung and the bark are stirred and mixed in the stirring tank 9, and as raw garbage, the first transport duct 12 and the second transport duct 1
Belt conveyors 1 in the third and third transfer ducts 14
It is conveyed to the fermenter 5 by 2a to 14a, and is put into this fermenter. The fermented bacteria are added to the raw garbage in the fermenter 5 that has been loaded and stored, but a belt conveyor in the processing duct 17 of the residual water removing device 6 is quantitatively supplied from the lower part of the fermenter through the duct 15 by the quantitative delivery device 16a. 1
7a (FIG. 8), and the process for removing excess moisture is carried from left to right in FIG. In this residual water removal step,
The microwaves oscillated from the microwave oscillating device 22 of the excess moisture removing device 6 are applied to the raw dust while being conveyed from one end (the left end in FIG. 1) of the processing duct 17 to the carry-out port 17b at the other end, As the water content is removed and the water content is reduced to a value at which fermenting bacteria can easily propagate, fermentation decomposition is promoted. The removed residual water becomes steam and is discharged together with the odor through the deodorizing pipe 26 of the deodorizing device 7. Since a certain amount of water is removed, the garbage is dried, and in this example, about 50%
To 35%, the fermentation decomposition is promoted, and as a result, the raw garbage in powder form is discharged from the outlet 17b.
Is conveyed to the collecting tank through the discharge duct 29 having the discharge belt built therein.

Next, the garbage processing device and the residual water removing device 6 will be described. As shown in FIGS. 1 to 3, the present processing apparatus includes a bark supply device 1 and a storage tank 2, a pretreatment device 3, a transfer device 4, a fermentation tank 5, and a residual water removal device 6.
And a deodorizing device 7. The bark supply device 1 supplies bark crushed to a certain size, and is provided with a fixed amount delivery device 1a at the supply port. The storage tank 2 stores cow dung. In the pretreatment device 3, this is provided with a hammer mill 8 as a crusher and a stirring tank 9 containing a stirrer. A duct 10 for transportation is provided between the bark feeder 1 and the hammer mill 8.
Further, the hammer mill 8 and the stirring tank 9 are connected by a transport duct 11. For this purpose, the bark has a belt conveyor 1 in the transport duct.
0a is conveyed to the hammer mill 8, where it is crushed to a predetermined size, and then conveyed to the stirring tank 9 on a belt conveyor in the conveyance duct 11. The cow dung in the storage tank 2 has a very high water content, and therefore the delivery device 2
It is put into the stirring tank 9 by a. The carry-out device 4 connects the fermentation tank 5 and the stirring tank 9 with each other.
The belt conveyors 12a, 1 inside the respective ducts for transportation are provided with the second and third ducts for transportation 12, 13, 14.
3a and 14a are continuously connected. The first transfer duct 12 is connected to the stirring tank 9, and the third transfer duct 14 is connected to the inlet of the opening / closing lid at the upper end of the fermentation tank 5. Therefore, one bark is crushed by the hammer mill 8 and then conveyed to the stirring tank 9, and the other cow dung is introduced into the stirring tank by the delivery device 2a, so that both are stirred and mixed in the stirring tank. Belt conveyor 12 as raw garbage
It is carried to the fermenter 5 by a to 14a and stored.

The fermentation tank 5 is a cylindrical tank having a volume capable of storing a large amount of, for example, 50 tons of raw garbage, and the fermentation bacterium is added to the stored raw garbage. A duct 15 inclined downward toward the tip is connected to the outside of the lower part of the fermentation tank 5. The leading end of the duct 15 is connected to a hopper 16 equipped with a constant quantity delivery device 16a, which is a processing duct 17 of the residual water removing device 6.
Constitutes the input port at one end of. The residual water removing device 6 will be described mainly based on FIGS. 4 to 8. The processing duct 17 is
The raw garbage input port 16 is provided at one end side, and a carry-out port 17b is provided at the other end (the right end side in FIG. 4).
9 (FIG. 1). The inside of the processing duct 17 is covered with a microwave shielding cover to hermetically seal the inside so that microwaves do not leak to the outside of the duct. An endless heat resistant belt conveyor 17a is provided inside the processing duct 17 with a driving roller 18 and a driven roller 19.
It is suspended between them (Figs. 2 and 8). As shown in FIG. 8, when the raw garbage G added from the fermentation tank 5 is placed on the belt conveyor 17a, it can be bent into a trough shape by the load of the raw garbage. Belt conveyor 17a
By deforming the belt into such a shape, it is possible to prevent the raw dust G from being carried out in a stable state, and to collect water from the raw dust at the center of the belt to prevent it from overflowing from both sides of the belt. The belt conveyor 17a includes a guide roller 2 that is axially supported by a support frame 20.
Guided by 1, 21a. In the upper part of the processing duct 17, a plurality of microwave oscillating devices 22 are arranged from one end side to the other end side at intervals in the longitudinal direction (left and right direction in FIG. 5).
Has been placed. Each microwave oscillating device 22 incorporates three magnetrons, which are microwave oscillators in this example, inside a case 23, and as shown in FIG. But the processing duct 17
Is opened on the inner wall surface of the upper part. Microwaves are applied to the raw garbage G on the belt conveyor 17a through these irradiation ports 24 to heat the raw garbage and dehydrate the raw garbage. The irradiation ports 24 of each of the three magnetrons are arranged at intervals in the width direction of the processing duct 17 (vertical direction in the figure) so that the microwaves are evenly applied to the garbage G as shown in FIG. 7. ing. While it is necessary to cool the inside of the case 23 during operation of each magnetron, an inlet (not shown) for taking in cooling air is provided for that purpose. This cooling air becomes hot exhaust air after use, but the hot exhaust air is exhausted between the case and the processing duct so that the hot exhaust air can be blown into the processing duct 17 for use of residual heat without discarding it as it is. It is connected by a pipe 25. The number of pipes of the warm exhaust air pipe 25 corresponds to that of each magnetron. The cooling air that has entered from the inlet of the case 23 becomes warm air after cooling, and each exhaust hot air tube 2 is heated by the fan.
Air is blown into the processing chamber 17 through 5 to promote the fermentation decomposition and evaporation of raw garbage, and exhaust heat can be utilized. The water removed from the raw garbage G becomes steam and is removed by the deodorizing device 7 together with the odor generated from the raw garbage.

The deodorizing device 7 will be described. Deodorizer 7
As shown in FIGS. 6 and 7, includes a deodorizing pipe 26, a suction fan 27, and a deodorizing tank 28. The deodorizing pipe 26 is connected to the upper part of the processing duct 17 at one end, and is connected to the deodorizing tank 2 at the other end.
8 and a suction fan 27 is provided in the middle thereof. For this reason, the odor and exhaust gas (water vapor) generated from the raw garbage G generated in the processing duct 17 are sucked by the suction fan 27.
Is sucked into the deodorizing pipe 26 due to the operation of the deodorizing tank 2
It is sent to No. 8 where it is deodorized and discarded. Therefore, the raw garbage G added with the fermenting bacteria, which is charged from the fermentation tank 5 through the charging port 16 of the processing duct 17, is the processing belt 1
Although it is placed on 7a and moved to the carry-out port 17b, microwaves from the magnetron provided in the moving direction are irradiated from the irradiation port 24 in the process of being moved, so that it is heated and contains water. Moisture is gradually evaporated, and fermentation decomposition is promoted along with this evaporation, and at the same time, the cooling air of the magnetron becomes exhaust hot air and is introduced into the processing duct 17 through the exhaust hot air pipe 25 and dried. Fermentation will be promoted, and the exhaust hot air will be used as residual heat to enable effective use of thermal energy. The fermented and decomposed food waste is carried out from the carry-out port 17b of the processing duct 17 to a discharge duct 29 having a built-in belt conveyor. In the spillage process, the water vapor and odor in the processing duct 17 are sucked into the odor pipe 26 by the suction force of the suction fan 27 of the deodorizing device 7,
It is pressure-fed to the deodorization tank 28. The exhaust warm air from the exhaust warm air pipe 25 is sent into the processing duct 17, and the exhaust odor is sucked by the deodorizing pipe 26 and exhausted to the outside of the processing duct, so that an air flow occurs in the processing duct. , Fermentation decomposition is promoted. 1 to 3, 30 is a deodorizing pipe of the fermenter 5, 31 is a maintenance staircase, 32 is an air pipe, 33 is a compressor, and 34 is a treatment building.

In the treatment method and treatment apparatus of the above example, the raw garbage added from the fermentation tank 5 to which the fermenting bacteria has been added is dried in the residual water removing device 6 to accelerate the fermentation decomposition. For raw garbage having a high water content such as human feces and sludge, the residual water may be removed by a residual water removing device as a pretreatment before the garbage is put into the fermentation tank. In this example, in FIG. 1, a residual moisture removing device 6 is installed between the pretreatment device 3 and, for example, the first transport duct 12, and the fermented food is fermented after the raw moisture is reduced to a predetermined moisture content by the residual moisture removing device. It is put into the tank 5 and fermentative bacteria are added in the fermentation tank to perform fermentation decomposition.

In the residual water removing step as the pretreatment step, there are cases in which the fermentation bacterium is added to the garbage and cases in which it is not added.

Another example of the residual water removing device will be described with reference to FIGS. In the residual moisture removing device 106 of this example,
The microwave oscillating device 122 is provided with one magnetron, and the microwave irradiation ports 124a, 124b, 1 of the waveguide are provided.
24c is opened in the inner wall of the upper portion of the processing duct 117,
In the example shown in FIG. 10 in the length direction of the processing duct 117, a set of three microwave oscillating devices adjacent to each other is provided so that the microwaves are evenly applied to the garbage G from each microwave irradiation port. , Microwave irradiation port 124a
Is arranged so that the central part of the conveyor belt 117a and the microwave irradiation ports 124b and 124c can be irradiated to both side parts thereof.
Other configurations and operations are substantially the same as the above example. In this example, one end of the exhaust warm air pipe 125 is provided so as to face the inlet for cooling air of the case 123, and the other end is connected to the side wall of the processing duct 117. 118 and 1
Reference numeral 19 is a drive roller and driven rollers 121 and 121a of the belt conveyor 117a, guide rollers 125, a hot exhaust air tube 125, a deodorizing tube 127 a suction fan 127, and a discharge duct 129.

The number of microwave oscillating devices 22 and 122 installed and the number of microwave oscillators provided in the microwave oscillating devices 22 and 122 themselves are not limited to the above-mentioned examples. It is decided in consideration of the difference in water content, the amount of treatment, the equipment cost, and the like. The conveyor belt conveyor is also housed inside the duct in the example shown in the figure, so there are advantages such as odors leaking out, scattering from the wind can be prevented, and there is no danger of getting wet with rainwater, etc. No need to use.

[0015]

According to the processing method and the processing apparatus of the present invention, since the garbage is heated by the microwave for processing, a large amount of the garbage is continuously dried to be finely powdered organic fertilizer. It can be used as a soil improver or a feed, and can effectively promote the effective use of raw garbage and the prevention of pollution such as environmental pollution. Further, according to the present invention, even if the cooling air of the microwave oscillating device becomes exhaust hot air, this is used as residual heat of the processing chamber, so that efficient use of energy becomes possible and promotion of fermentation decomposition action even in cold regions. Further, according to the present invention, since the deodorizing exhaust and the blowing of the exhaust warm air are simultaneously performed in the processing chamber, the dehydration is effectively performed.
Further, a large amount of raw garbage to which the fermentation bacterium has been added from the fermentation tank is dehydrated in the processing chamber to promote fermentation decomposition. Further, according to the residual water removing device of the present invention, a large amount of raw garbage having a high water content can be intentionally dried.

[Brief description of drawings]

FIG. 1 is a plan view of a processing apparatus showing an embodiment of the present invention.

FIG. 2 is a front view of a processing apparatus showing an embodiment of the present invention.

FIG. 3 is an enlarged side view of the processing apparatus showing the embodiment of the present invention, in which the maintenance stairs are omitted.

FIG. 4 is an enlarged front view of the residual moisture removing device of the processing apparatus showing the embodiment of the present invention.

FIG. 5 is an enlarged plan view of the residual water removing device of the processing apparatus showing the embodiment of the present invention.

FIG. 6 is an enlarged front view of the main part of the residual moisture removing device of the processing apparatus showing the embodiment of the present invention.

FIG. 7 is an enlarged plan view of a main part of the residual water removing device of the processing apparatus showing the embodiment of the present invention.

FIG. 8 is an enlarged sectional view taken along the line AA of FIG.

FIG. 9 is a front view showing a main part of a second embodiment of the residual moisture removing device.

FIG. 10 is a plan view showing an essential part of a second embodiment of the residual moisture removing device.

FIG. 11 is an enlarged side view showing a main part of a second embodiment of the residual moisture removing device.

FIG. 12 is an enlarged cross-sectional view showing a state in which the belt conveyor in the processing duct of the second embodiment of the residual moisture removing device is carrying the garbage.

[Explanation of symbols]

 1 Burk Supply Device 2 Storage Tank 3 Pretreatment Device 4 Conveyor Device 5 Fermentation Tank 6 Excess Moisture Removal Device 7 Deodorization Device 12 1st Conveying Duct 13 2nd Conveying Duct 14 3rd Conveying Duct 16 Input Port 17 Treatment Duct 17a Belt conveyor 17b Carrying port 22 Microwave oscillating device (microwave generating means) 24 Microwave irradiating port 25 Exhaust hot air tube 26 Deodorizing tube 28 Deodorizing tank 106 Excess water removing device 117 Processing duct 117a Belt conveyor 117b Carrying port 122 Microwave oscillation Device (microwave generation means) 124a Microwave irradiation port 124b Microwave irradiation port 124c Microwave irradiation port 125 Exhaust hot air tube 126 Deodorization tube G Raw garbage

Claims (9)

[Claims] 1. A method for treating raw garbage, which comprises moving the garbage in a predetermined direction while applying microwaves to the raw garbage to heat and dry it in a sealed processing chamber. 2. The treatment of raw garbage, wherein the raw garbage to which the fermentation bacterium has been added is heated in a sealed treatment chamber by microwaves to be heated and dried while being moved in a predetermined direction in the treatment chamber. Method. 3. A microwave is fed from a microwave generator to the garbage containing the fermenting bacteria in a sealed processing chamber to heat and dry the garbage, and the transportation means moves the processing chamber in a predetermined direction. A method for treating raw garbage, comprising: blowing warm exhaust air discharged from the microwave generator into a treatment chamber. 4. A sealed processing chamber provided with a conveying means for moving the raw garbage to which the fermentation bacterium has been added to the carry-out side, and a microwave applied to the raw garbage in the processing chamber. A microwave oscillating device for heating and drying, wherein the microwave oscillating and heating device is a microwave oscillating device provided in plurality in the processing chamber along the moving direction of the garbage. A device for processing raw garbage. 5. A sealed processing chamber provided with a conveying means for moving the raw garbage containing the fermentation bacterium inside to the outlet side, and applying the microwave to the raw garbage in the processing chamber. A microwave oscillating device for heating and drying, and a plurality of the microwave oscillating devices are provided in the processing chamber along the moving direction of the garbage, and a microwave irradiation port of the waveguide. Is opened toward the processing chamber, and between the microwave oscillating device and the processing chamber, an exhaust hot air pipe for blowing the exhaust hot air discharged from the microwave generator into the processing chamber is piped. A garbage disposal device characterized by being installed. 6. A sealed processing chamber provided with a conveying means for moving the raw garbage to which the fermentation bacterium has been added to the carry-out side, and a microwave applied to the raw garbage in the processing chamber. A microwave oscillating device for heating and drying, and a deodorizing device are provided, and the microwave oscillating device is
A plurality of microwave irradiation ports of the waveguide are opened in the processing chamber along the moving direction of the garbage, and the microwave irradiation device of the waveguide is opened toward the processing chamber. An exhaust hot air pipe for blowing the exhaust hot air exhausted from the wave generator into the processing chamber is provided, and the deodorizing device has an odor pipe for exhausting exhaust gas and odor in the processing chamber. A device for processing raw garbage. 7. A sealed processing chamber having therein a fermenter, a conveying means for moving the garbage containing the fermentative bacteria sent from the fermentor to the carry-out side, and the inside of the processing chamber. A microwave oscillating device for applying microwaves to the raw garbage to heat and dry it. A plurality of the microwave oscillating devices are provided in the processing chamber along the moving direction of the raw dust. The microwave irradiation port of the waveguide is opened toward the processing chamber, and the warm exhaust air exhausted from the microwave generator is blown into the processing chamber between the microwave oscillating device and the processing chamber. An apparatus for treating food waste, which is provided with an exhaust hot air pipe for cooling. 8. A sealed processing chamber provided with a conveying means for moving raw garbage to the carry-out side, and a microwave oven for heating and drying microwave by applying microwave to the raw garbage. A plurality of microwave oscillating devices are provided in the processing chamber along the moving direction of the garbage, and the microwave irradiation port of the waveguide is opened toward the processing chamber. Between the microwave oscillating device and the processing chamber, an exhaust hot air pipe for blowing the exhaust hot air discharged from the microwave generating device into the processing chamber is piped, and the raw garbage is fermented. An apparatus for removing residual moisture from raw garbage, characterized in that it is selected from either raw garbage to which bacteria have been added or raw garbage to which fermentation bacteria have not been added. 9. A sealed processing chamber provided with a conveying means for moving raw garbage to the carry-out side, and a microwave oven for heating and drying microwave by applying microwave to the raw garbage. A microwave oscillating device and a deodorizing device are provided. A plurality of the microwave oscillating devices are provided in the processing chamber along the moving direction of the garbage, and the microwave irradiation port of the waveguide is provided in the processing chamber. An exhaust hot air pipe for blowing hot exhaust air exhausted from the microwave generation device into the processing chamber is provided between the microwave oscillator and the processing chamber, and the deodorization is performed. The apparatus has an odor pipe for exhausting exhaust gas and odor in the processing chamber, and the raw garbage is
An apparatus for removing residual water content of raw garbage, characterized in that it is selected from either raw garbage to which the fermentation bacterium has been added or raw garbage to which the fermentation bacterium has not been added.