JPH11221546A - Garbage treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the garbage treating device by which the garbage having a high content of oil is treated without increasing the device cost and running cost, and the dried granular compost is produced. SOLUTION: Garbage is mixed with an fermentation bed 4 contg. aerobes and composted by this garbage treating device. A fixed blade 9 is set on the inner wall of a fermentation tank 1 the half of the length of the tank 1 closer to a compost outlet 10 to crush the fermentation bed 4 coarsely granulated or lumped, hence the granular compost is produced, the load on a driving means 7 is lowered, and the power consumption, i.e., the running cost, is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for treating garbage in which garbage is mixed with aerobic bacteria, fermented, and composted.

[0002]

2. Description of the Related Art There is a garbage disposal apparatus that converts an organic waste such as garbage into compost by fermentation using microorganisms that inhabit the soil. It is desirable that the produced compost has a high decomposition rate and is a sufficiently dried powder having a particle size of 20 mm or less. Japanese Patent Application Laid-Open No. Hei 6-304542 and Japanese Patent Application Laid-Open No. 9-57235 disclose devices for simultaneously performing fermentation and drying.

[0003]

[0003] When garbage with a high oil content such as fish and meat is supplied, the oil content of the fermentation bed increases. When the moisture content of the fermentation bed with a high oil content decreases, the particles bind to each other and the coarse particles having a particle size of 20 mm or more pass through a coarse particle having a particle size of 50 mm.
It becomes more massive. In a device where the fermenter is partitioned and the garbage supply port and the compost discharge port are installed in different sections of the fermenter, the moisture content of the fermentation bed is lower near the compost discharge port than near the garbage input port. . Since the fermentation bed near the compost discharge port has a low water content and a high oil content, the fermented bed is likely to be coarse or lump, and there is a possibility that powdered compost cannot be obtained. Therefore, it is necessary to improve the crushing effect near the compost discharge port.

JP-A-6-304542 and JP-A-9-57235
In the device described in Japanese Patent Application Laid-Open Publication No. H11-157, the crushing effect is small in the vicinity of the compost discharge port, and there is a possibility that coarse or massive compost is discharged. Further, the compost discharge port may be clogged by the massive compost. Further, when a fixed blade is provided in the entire fermenter as in the apparatus described in JP-A-6-279159, the crushing effect is improved, but the stirring torque is also increased. For this reason, it becomes necessary to install a large-sized motor, and the apparatus price and operating cost increase.

The present invention improves the crushing effect of the fermentation bed near the compost outlet, and makes it possible to reduce the cost of equipment and the operating cost even when garbage with a high oil content is introduced, without compromising the dry powder compost. It is intended to provide a garbage disposal apparatus capable of obtaining garbage.

[0006]

Means for Solving the Problems To achieve the above object, a garbage disposal apparatus according to the present invention comprises a fermenter having a garbage supply port and a compost discharge port, and a rotating shaft installed in the fermenter. A stirring means having a plurality of stirring arms fixed thereto, a driving means for driving the stirring means, and a fixed blade provided on an inner wall of the fermenter, including aerobic bacteria which are filled with garbage in the fermenter in advance. In a garbage processing apparatus that is composted while being mixed with a fermentation bed, the fixed blade is disposed on the inner wall of the fermentation tank, which is behind half the length of the fermentation tank.

A fermenter having a food waste supply port and a compost discharge port and divided into a plurality of sections by a partition plate, and a stirring apparatus having a plurality of stirring arms fixed to a rotating shaft installed in the fermentation tank. Means, a driving means for driving the stirring means, and a fixed blade provided on an inner wall of the fermenter, and composting while mixing garbage with a fermentation bed containing aerobic bacteria previously filled in the fermenter. In the garbage processing apparatus, the fixed blade was disposed in a section having the compost outlet. Alternatively, the arrangement interval of the stirring arm is changed between the section having the garbage supply port and the section having the compost discharge port, and the arrangement interval of the stirring arm is compared with the interval in the section having the garbage supply port. The space between the compartments having the compost outlet was narrowed.

Further, the shape of the stirring arm is changed between the section having the garbage supply port and the section having the compost discharge port, and the stirring arm of the section having the garbage supply port is formed into a round bar,
The stirring arm of the compartment having the compost outlet was a square bar. Further, the rotation speed of the rotating shaft is changed between the section having the garbage supply port and the section having the compost discharge port, and the rotation speed in the section having the compost discharge port is changed to the section having the garbage supply port. The rotation speed was higher than in.

Further, a fermentation tank having a food waste supply port, a compost discharge port, and a compost storage box, a stirring means having a plurality of stirring arms fixed to a rotating shaft installed in the fermentation tank, and a drive for driving the stirring means Means, provided with a fixed blade on the inner wall of the fermentation tank, in a garbage processing apparatus that composted while mixing garbage with a fermentation bed containing aerobic bacteria previously filled in the fermentation tank, Crushing means was provided between the compost outlet and the compost storage box.

[0010]

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of an embodiment of the garbage disposal apparatus of the present invention. A garbage supply port 2 and a lid 3 are provided at an upper portion of the fermenter 1 so as to close the garbage supply port 2. The fermenter 1 is pre-filled with a fermentation bed 4 containing aerobic bacteria. A rotating shaft 6 to which a plurality of stirring arms 5 are attached is provided inside the fermenter 1. Driving means 7 such as a motor is connected to the rotating shaft 6. The driving means 7 is a control means 8 comprising a microcomputer or the like.
, Intermittently rotate in response to the control signal from, and alternately repeat clockwise and counterclockwise.

Thus, the garbage and the fermentation bed 4 are stirred and mixed. A fixed blade 9 is provided on the inner wall of the fermenter 1 vertically toward the rotating shaft 6. The length of the fixed blade 9 is desirably １ ／ or less of the length of the stirring arm 5. The garbage supplied into the fermenter 1 is subjected to a fermentation and drying process, and the produced compost is stored in a compost storage box 11 through a compost outlet 10.

The oxygen-containing gas is supplied to the oxygen-containing gas supply means 12.
To the fermenter 1. Oxygen in the oxygen-containing gas is consumed by microorganisms in the fermentation bed 4, and gas generated by fermentation is exhausted outside the system via the deodorizing means 13. A heating means 14 including an electric heater, an infrared heater and the like is provided on the outer wall of the bottom tank of the fermenter 1. Heating means 14
Is controlled by a signal from the control means 8, and the fermentation bed 4 is kept at a temperature suitable for the growth of microorganisms.

When the ratio of the width to the diameter of the fermenter 1 becomes 1 or more, the time until the fermentation bed 4 is uniformly mixed becomes longer. For this reason, the fermentation bed 4 near the garbage supply port 2 and the fermentation bed 4 near the compost discharge port 10 have different residence times, and the degree of drying of the fermentation bed 4 varies. The water content of the fermented bed 4-a near the garbage supply port 2 after 24 hours from the supply of garbage is about 15 to 40%. However, the fermentation bed 4-b close to the compost outlet 10 may have a moisture content of about 15% or less because drying and fermentation are progressing.

When garbage having a high content of fish and meat is supplied into the fermenter 1, the oil content of the fermentation bed 4 becomes higher than that of a case where ordinary garbage is treated. When the oil content on a dry basis is 15% or more and the water content is 15% or less, particles in the fermentation bed 4 tend to bind to each other. For this reason, the fermentation bed 4 may change from powder particles having a particle size of 20 mm or less to coarse particles having a particle size of 20 mm or more, or adhere to the stirring arm 5 to form a lump and rotate together.

As described above, when the oil content increases in the fermentation bed 4, the properties of the produced compost deteriorate and the compost outlet 1
There is a danger that it will lead to zero clogging. In this apparatus, a fixed blade 9 is provided on the inner wall of the fermenter 4, and the crushing ability of the fermentation bed 4 near the compost discharge port 10, which tends to be coarse or lump, is improved by engaging the stirring arm 5 with the fixed blade 9. Therefore, even for garbage containing a large amount of fish and meat, it is possible to prevent deterioration of the properties of the produced compost and clogging of the compost discharge port 10.

The fixed blade 9 is preferably installed on the inner wall of the fermenter 1 closer to the compost outlet 10 than half the length of the fermenter 1. When the fixed blade 9 is installed in the entire fermenter, the stirring torque increases. In addition, when the garbage and the fermented bed 4-a having a high water content are crushed by the stirring arm 5 and the fixed blade 9, the stirring torque is larger than when crushing the fermented bed 4-b having a low water content. However, in the present apparatus, since the fixed blade 9 is installed only near the compost discharge port 10, drying proceeds and the fermentation bed 4-b having a low moisture content is crushed. Therefore, the load on the driving means 7 can be reduced, and the power consumption, that is, the operating cost can be reduced.

(Embodiment 2) FIG. 2 shows another embodiment of the present invention. In this apparatus, the inside of the fermenter 1 is divided into a plurality of tanks by a partition plate 15. The number of the partition plates 15 is the fermenter 1
Vary according to the length. The tanks separated by the partition plate 15 are referred to as a first tank 16, a second tank 17, and a third tank 18 in order from the garbage supply port 2 to the compost discharge port 10. The water content of the fermentation bed 4 decreases from the first tank 16 to the third tank 18. For this reason, when processing the garbage of a high oil content, the fermentation bed 4 of the 3rd tank 18 may become a coarse grain or a lump. Therefore, it is necessary to install the fixed blade 9 in the third tank 18 to improve the crushing ability of the fermentation bed 4 in the third tank 18. Further, the fixed blade 9 may be installed in both the second tank 17 and the third tank 18.

(Embodiment 3) FIG. 3 shows another embodiment of the present invention. In the present apparatus, the mounting interval of the stirring arm 5 of the third tank 18 is narrower than that of the first tank 16 and the second tank 17. The crushing effect is improved by reducing the mounting interval of the stirring arm 5. Therefore,
Even in the case of treating garbage having a high oil content, by narrowing the mounting interval of the stirring arm 5 of the third tank 18, it is possible to obtain compost of dry powder. When the shape of the stirring arm is changed from a round bar to a square bar as shown in FIG. 4, the crushing effect is improved and the same effect can be obtained.

(Embodiment 4) FIG. 5 shows another embodiment of the present invention. In this apparatus, the fermenter 1 is divided into two or more vertically or horizontally. The rotating shaft 6 is arranged separately in the fermenter 1 and can change the rotating speed. When the rotation speed of the rotating shaft 6 is increased, the crushing effect can be improved. As shown in FIG.
When only the rotation speed of the fermenter 1 in the latter stage having the compost outlet 10 is increased, the crushing effect is improved in the latter stage, and the fermented bed 4 which has become coarse or clumpy can be crushed.

(Embodiment 5) FIG. 6 shows another embodiment of the present invention. In this apparatus, a crushing means 19 such as a biaxial shearing method is provided between the compost discharge port 10 and the compost storage box 11. The fermentation bed 4 is discharged to the compost storage box 11 through the crushing means 19. Since the fermentation bed 4 is crushed by the crushing means 19, even when the fermented bed 4 becomes coarse or lump, the produced compost becomes powder.

[0021]

According to the present invention, by improving the crushing capacity near the garbage discharge port, even when processing garbage having a high oil content, drying can be performed without increasing the equipment price and operating cost. The resulting compost is in the form of powder.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a garbage processing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a garbage processing apparatus according to another embodiment of the present invention.

FIG. 3 is a schematic diagram of a garbage disposal apparatus according to another embodiment of the present invention.

FIG. 4 is a schematic perspective view of a stirring arm of a garbage disposal apparatus according to another embodiment of the present invention.

FIG. 5 is a schematic view of a garbage processing apparatus according to another embodiment of the present invention.

FIG. 6 is a schematic diagram of a garbage disposal apparatus according to another embodiment of the present invention.

[Explanation of symbols]

1 ... fermentation tank, 2 ... garbage supply port, 3 ... lid, 4 ... fermentation bed,
Reference numeral 5: stirring arm, 6: rotating shaft, 7: driving means, 8: control means, 9: fixed blade, 10: compost outlet, 11: compost storage box, 12: oxygen-containing gas supply means, 13: deodorizing means, 14 heating means, 15 partition plate, 16 first
Tank, 17: second tank, 18: third tank, 19: crushing means.

 ──────────────────────────────────────────────────の Continued on front page (72) Inventor Setsuo Saito 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi Research Laboratory, Hitachi, Ltd.

Claims (9)

[Claims] 1. A fermentation tank having a garbage supply port and a compost discharge port, stirring means having a plurality of stirring arms fixed to a rotating shaft installed in the fermentation tank, and driving means for driving the stirring means; A garbage disposal apparatus wherein a fixed blade is provided on an inner wall of the fermenter so that the garbage is composted while being mixed with a fermentation bed containing aerobic bacteria previously filled in the fermenter. A garbage disposal apparatus, wherein the fixed blade is disposed on an inner wall of the fermentation tank behind a half of the length of the garbage. 2. A fermenter having a food waste supply port and a compost discharge port, and divided into a plurality of sections by a partition plate;
Stirring means having a plurality of stirring arms fixed to a rotating shaft installed in the fermentation tank, driving means for driving the stirring means, and fixed blades on the inner wall of the fermentation tank are provided so that the garbage can be fermented in advance. In a garbage processing device that was made to compost while mixing with a fermentation bed containing aerobic bacteria filled in the tank,
A garbage disposal apparatus wherein the fixed blade is disposed in a section having the compost outlet. 3. A fermenter having a food waste supply port and a compost discharge port, divided into a plurality of sections by a partition plate,
A stirring means having a plurality of stirring arms fixed to a rotating shaft installed in the fermentation tank, and a driving means for driving the stirring means are provided, and aerobic bacteria containing garbage previously filled in the fermentation tank are included. A garbage disposal apparatus that is configured to be composted while being mixed with a fermentation bed, wherein the arrangement interval of the stirring arm is changed between a section having the garbage supply port and a section having the compost discharge port. Garbage disposal equipment. 4. The garbage according to claim 3, wherein the space between the sections having the compost discharge port is narrower than the space between the stirring arms in the section having the garbage supply port. Processing equipment. 5. A fermenter having a food waste supply port and a compost discharge port, and divided into a plurality of sections by a partition plate;
A stirring means having a plurality of stirring arms fixed to a rotating shaft installed in the fermentation tank, and a driving means for driving the stirring means are provided, and aerobic bacteria containing garbage previously filled in the fermentation tank are included. A garbage disposal apparatus that is configured to be composted while being mixed with a fermentation bed, wherein the shape of the stirring arm is changed between a section having the garbage supply port and a section having the compost discharge port. Waste treatment equipment. 6. The garbage according to claim 5, wherein the stirring arm of the section having the garbage supply port is a round bar, and the stirring arm of the section having the compost discharge port is a square bar. Processing equipment. 7. A fermenter having a garbage supply port and a compost discharge port and divided into a plurality of sections by a partition plate.
A stirring means having a plurality of stirring arms fixed to a rotating shaft installed in the fermentation tank, and a driving means for driving the stirring means are provided, and aerobic bacteria containing garbage previously filled in the fermentation tank are included. A garbage processing apparatus that is configured to be composted while being mixed with a fermentation bed, wherein the rotation speed of the rotating shaft is changed between a section having the garbage supply port and a section having the compost discharge port. Garbage disposal equipment. 8. The garbage disposal apparatus according to claim 7, wherein the rotation speed in the section having the compost discharge port is higher than the rotation speed in the section having the garbage supply port. 9. A fermentation tank having a garbage supply port, a compost discharge port, and a compost storage box, a stirring means having a plurality of stirring arms fixed to a rotating shaft installed in the fermentation tank, and driving the stirring means. A garbage disposal apparatus in which a driving means and a fixed blade are provided on the inner wall of the fermenter so that the garbage is composted while being mixed with a fermentation bed containing aerobic bacteria previously filled in the fermenter. A garbage disposal device, wherein crushing means is provided between the compost discharge port and the compost storage box.