JPH08267037A - Treatment of crude refuse and device therefor - Google Patents

Abstract

PURPOSE: To efficiently decompose crude refuse by heating packing materials only when the crude refuse is charged into a treating vessel for aerobically decomposing the crude refuse, then controlling a heating means to a specific temp. range to the extent that the temp. of the packing materials does not fall excessively. CONSTITUTION: An agitating device 11 is driven and the energization to heaters 23, 24 is started when an opening/closing cap 5 is closed after the opening/ closing cap 5 is opened and the crude refuse 25 is charged. A packing materials 26 are heated via the wall surfaces of a treating vessel 3 by the heat generation of the heater 23. Air from an air pump 19 is heated by the heater 24 and air is blown into the treating vessel 3, by which the packing material 26 are heated. The energization to the heaters 23, 24 is stopped and simultaneously the agitating device 11 is stopped when the temp. of the packing material 26 measured by a temp. sensor 22 attains 30 to 37 deg.C. The temp. is thereafter so controlled as to prevent the temp. of the packing materials 26 from falling below 10 to 15 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food waste processing apparatus for processing food waste discharged at home to render it harmless.

[0002]

2. Description of the Related Art Generally, household waste is collected and treated collectively by local governments, but a large-scale treatment facility is required and the cost increases.
There are also bad odors and hygiene problems, which have become social problems.

[0003] Recently, therefore, there has been proposed a domestic food waste processing apparatus in which food waste is stored in a processing tank together with a filler, and the food waste is decomposed by the action of microorganisms.
Various products are commercially available.

For example, as an example thereof, Japanese Patent Laid-Open No. 5-221
The one described in Japanese Patent No. 766 is known. This product accommodates filler such as sawdust and raw garbage in the treatment tank, stirs the filler and raw garbage in the treatment tank with stirring blades, ferments the raw garbage to decompose it, and treats it. Is.

In this type of food waste treatment apparatus, when the food waste is decomposed by the action of microorganisms, it may be decomposed aerobically or anaerobically, but it has a high decomposition rate and a bad odor. In general, it is preferable to decompose aerobically in the presence of air, for example, due to the low generation of

[0006] Therefore, in the food waste processing device described in the above publication, a filler such as sawdust is put in the treatment tank, and a stirring device for the filler is attached to the treatment tank, and it is openably and closably mounted on the upper portion of the treatment tank. The lid is equipped with a motor that drives the stirring blades to rotate and an air pump that sends air into the processing tank, and agitates while blowing air into the filler to aerobically decompose the garbage and fill it. The air that has passed through the material is purified by the water removing means and the deodorizing means at the bottom.

[0007]

By the way, in the case of decomposing food waste by the action of microorganisms, it is generally said that the growth activity of microorganisms becomes active at a temperature of about 30 to 37 ° C. and the decomposition rate of food waste becomes faster. There is.

In the state where there is no food waste to be decomposed, the filling material is approximately equal to the outside temperature, but when the food waste is introduced and decomposition starts, the temperature rises due to the heat of fermentation, and the temperature reaches the optimum temperature. The temperature rises and the garbage is decomposed. If the food waste is completely decomposed, the temperature will drop to the same level as the outside temperature.

However, as described above, when there is no food waste, the temperature of the filling material is low, and even if food waste is put into it, the activity of microorganisms is inactive, the decomposition rate is low, and the temperature rises accordingly. do not do. When the temperature rises to a certain degree, the activity of microorganisms is activated and food waste is rapidly decomposed, but it takes a considerable time to reach that state.

In the invention described in the above-mentioned publication, a heater is attached to the processing tank to raise the temperature of the filling material to quickly decompose the food waste. However, even if there is almost no food waste, the filling is performed. This raises the temperature of the material, which is uneconomical.

The present invention has been made in view of the above circumstances, and warms the filler only when the garbage is put into the processing tank to accelerate the decomposition of the garbage, and after that, the filler is decomposed. The object of the present invention is to efficiently decompose the food waste by controlling the heating means to such an extent that the temperature does not excessively decrease, and without heating unnecessarily.

[0012]

The method for treating food waste according to the present invention is a method for treating food waste that aerobically decomposes the food waste while stirring the filler and the food waste contained in the treatment tank. In the above, after the operation of putting food waste into the treatment tank, the filler in the treatment tank is heated to 30 to 37 ° C., and after that, the temperature of the filler does not become lower than 10 to 15 ° C. It is characterized by controlling heating.

In the present invention, the filling material can be heated by blowing warm air into the filling material, and it can also be heated by a heater provided in the treatment tank or on the outer surface of the treatment tank. it can.

Further, in the present invention, the temperature of the filler is 3
When the temperature exceeds 7 ° C, it is preferable to stir the contents of the treatment tank and cool the treatment tank by ventilating the air in the treatment tank.

Further, the food waste treating apparatus of the present invention comprises an agitating device which is rotated by a vertical rotating shaft in a cylindrical treating tank, and an air feeding means for feeding air into the treating tank at the bottom of the treating tank. Provided in the upper part of the processing tank is an opening closed by an opening / closing lid, and the filler stored in the processing tank and the food waste introduced through the opening are stored in the processing tank by the air supply means. In the food waste treatment device that agitates and mixes with the agitator while feeding air into the food waste processing device that aerobically decomposes the food waste, the heating means for heating the filler and the temperature of the filler are A temperature sensor for measurement is provided, and the stirrer and / or the heating means are operated by feeding the garbage into the processing tank to remove the filler 3
Heat to 0-37 ° C, then the temperature of the filler is 10-
It is characterized in that the temperature is controlled so as not to fall below 15 ° C.

In the apparatus of the present invention, an opening / closing sensor is provided on the opening / closing lid, and when the opening / closing lid detects that the opening / closing lid closes the opening, the stirring device and / or the heating means are activated. It is preferable to start it.

It is also possible to provide a manual start switch at an appropriate position on the exterior body 2 or the opening / closing lid 5 of the apparatus and operate the switch to start the operation of the stirring device and / or the heating means.

In the apparatus of the present invention, the heating means is a heater provided at the air inlet of the air supply means, and the air heated by the heater is supplied to the inside of the processing tank by the air supply means. It can be arranged to be sent to. Further, it may be a heater provided in the treatment tank or on the outer surface of the treatment tank.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a food waste processing apparatus 1 of the present invention. In this garbage processing device 1, 2 is an exterior body,
A cylindrical processing tank 3 is housed in the exterior body 2,
An upper opening 4 of the processing tank 3 is closed by an opening / closing lid 5 so as to be opened and closed.

The exterior body 2 is composed of a shoulder body 6, a body 7 and a bottom body 8. The bottom body 8 is fixed to the bottom of the processing bath 3,
The shoulder body 6 is attached to the upper end portion of the processing tank 3, and the body 7 formed by bending a metal plate into a tubular shape is fixed by sandwiching the upper and lower ends thereof with the shoulder body 6 and the bottom body 8. There is.

Reference numeral 9 denotes a take-out port provided on the lower side surface of the food waste treating apparatus 1 from the inside of the treatment tank 3 to the outside, through which the contents of the treatment tank 3 can be discharged. The closing lid 10 is normally closed.

Reference numeral 11 denotes a stirrer provided in the processing tank 3, which is a rotating shaft 1 erected at the center of the bottom of the processing tank 3.
An arm 13 is attached to the upper end of 2, and a stirring blade 14 that extends upward in a spiral shape along the inner surface of the processing tank 3 is formed at the tip of the arm 13. Further, a motor 15 is attached to the lower end of the rotary shaft 12, and the stirring device 1
1 is rotationally driven.

An annular space 16 is formed at the bottom of the processing tank 3, and the filter 2 is provided on the peripheral wall surface thereof.
An air outlet 17 having 8 is formed, and the space 16 communicates with the inside of the processing tank 3. An air inlet 18 is provided in the space 16 so as to project air from the air inlet 18 into the space 16 by an air pump 19 as an air supply means.

Further, the arm 13 in the stirring device 11
The bent portion 20 is formed at the other end, and the bent portion 20 is rotated by the stirring device 11 so that the air outlet 17
It is preferable to pass just before.

Reference numeral 21 is a ventilation device provided on the opening / closing lid 5. Although this ventilation device 21 is not always necessary in the present invention, this ventilation device 21 is provided on the opening / closing lid 5 or the upper part of the processing tank 3 to ventilate the inside of the processing tank 3 by discharging the air in the processing tank 3 to the outside. Preferably.

Reference numeral 22 denotes a temperature sensor attached to the surface of the processing bath 3 for measuring the temperature inside the processing bath 3. A heater 23 is attached to the surface of the processing tank 3 so as to heat the inside of the processing tank 3.

Reference numeral 24 is a heater attached to the air intake of the air pump 19, which heats the air sucked into the air pump 19, and heats the heated air from the air inlet 18 into the space 16 And is blown into the processing tank 3 through the air outlet 17. Treatment tank 3
Only one of the heater 23 attached to the heater 23 and the heater 24 attached to the air inlet of the air pump 19 may be provided.

An open / close sensor 25 is provided above the processing tank 3.
Is attached, and the open / close state of the open / close lid 5 is detected by the open / close sensor 25.

[0029]

In order to use the food waste treating apparatus 1 of the present invention, the filler 26 such as sawdust is stored in the treatment tank 3.
Then, the opening / closing lid 5 is opened and the garbage 27 is put into the filling material 26 through the upper opening 4. Garbage 27 is a lid 5
Can be opened and put in as needed.

When the open / close lid 5 is closed after the garbage 27 has been put in, the opening / closing sensor 25 detects it and the stirring device 11 is rotated to stir the filling material 26. Heaters 23 and 2
Energize 4.

Instead of the open / close sensor 25, a start switch (not shown) is provided at an appropriate position on the surface of the outer casing 2 or the open / close lid 5, and the start switch is manually operated to operate the stirring device 11. It is also possible to start the operation and / or the energization of the heaters 23, 24.

By energizing the heater 23, the filling material 26 is heated through the wall surface of the processing tank 3, and by energizing the heater 24, the air sent from the air pump 19 is heated. The filler 26 is heated by blowing the heated air into the filler 26.

Thus, the temperature of the filling material 26 is detected by the temperature sensor 2
When the filler 26 is heated to 30 to 37 ° C. as measured in step 2, the energization of the heaters 23 and 24 is stopped, and the stirring by the stirrer 11 is also stopped.

In this state, the filler 26 is heated to the optimum temperature for the activity of the microorganisms, so that the filler 2
The activities of the microorganisms in 6 become active, and the garbage 27 mixed in the filler 26 is rapidly decomposed by the action of the microorganisms. When the food waste 27 is decomposed, heat is generated, so that the temperature of the filler 26 is maintained by the heat, and the food waste 27
Disassembly continues.

When the temperature of the packing material 26 becomes excessively high, the activity of microorganisms is rather lowered when the temperature of the packing material 26 becomes excessively high. Therefore, when the packing material 26 exceeds 37 ° C., the stirring device 11 is used. It is preferable that the filler 26 is cooled by rotating and stirring and blowing air not heated by the air pump 19 into the treatment tank 3 and ventilating the treatment tank 3 by the ventilation device 21.

While the temperature of the filler 26 is 30 ° C. or higher, air is intermittently blown and the agitator 11 is operated to replenish the air and agitate the filler 26 and the garbage 27. Is preferred.

When the temperature of the filling material 26 becomes 30 ° C. or lower, it is considered that the previously put food waste 27 is almost completely decomposed. Since the amount of heat generated by the decomposition of the food waste 27 decreases, the temperature of the filler 26 decreases, but if the temperature becomes lower than 15 ° C, it is considered that the microbial growth activity is almost stopped.
It is preferable to keep the temperature above ℃.

Therefore, in the present invention, the temperature of the filler 26 is 1
The heater 2 so that the temperature does not drop below 5 ° C.
Power is supplied while controlling 3 and 24, and the agitator 11 is operated in synchronization with it.

Then, when the opening / closing lid 5 is opened next time and the garbage 27 is put in from the upper opening 4, the opening / closing sensor 25 detects that the opening / closing lid 5 is closed, and energizes the heaters 23 and 24 while stirring. 11 and the air pump 19 are operated to mix the filler 26 and the garbage 27 and heat them,
The activity of microorganisms is rapidly activated, and the garbage 27 can be decomposed.

[0040]

Thus, according to the present invention, the filler 2 is normally used.
Since the temperature of 6 is only maintained to such an extent that the growth activity of microorganisms is not lost, the filler 26 is not heated unnecessarily, which is economical.

When the garbage 27 is put into the filler 26, the filler 26 and the garbage 27 are stirred and mixed, and the inside of the treatment tank 3 is heated to an optimum temperature for the growth activity of microorganisms. Therefore, the microorganisms produce vigorous growth activity and decompose the food waste 27 aerobically and rapidly.

Therefore, according to the present invention, the introduced garbage 27 is rapidly decomposed by the action of microorganisms, and when the garbage 27 is not introduced, it is not heated unnecessarily, which is economically excellent. -ing

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view of an embodiment of the present invention.

[Explanation of symbols] 1 garbage treatment device 3 treatment tank 4 upper opening 5 opening / closing lid 11 stirring device 12 rotating shaft 19 air pump 22 temperature sensor 23, 24 heater 25 opening / closing sensor 26 filling material 27 food waste

Claims (9)

[Claims] 1. A filler (2) contained in a treatment tank (3).
6) and the raw garbage (27) are aerobically decomposed while agitating the raw garbage (27), in the raw garbage treatment method, the raw garbage (27) is put into the treatment tank (3). rear,
Heating the filler (26) in the treatment tank (3) to 30 to 37 ° C., and then controlling the heating so that the temperature of the filler (26) does not drop below 10 to 15 ° C. Garbage disposal method characterized by 2. The method for treating food waste according to claim 1, wherein the filler (26) is heated by blowing warm air into the filler (26). 3. Raw material according to claim 1, characterized in that the filler (26) is heated by a heater (23) provided in the treatment tank (3) or on the outer surface of the treatment tank (3). Garbage disposal method 4. When the temperature of the filler (26) exceeds 37 ° C., the contents of the treatment tank (3) are agitated, and the air in the treatment tank (3) is ventilated to cool it. The method of treating food waste according to claim 1, characterized in that 5. A cylindrical treatment tank (3) is provided with an agitator (11) rotated by a vertical rotation shaft (12), and air is introduced into the treatment tank (3) at the bottom of the treatment tank (3). An air supply means (19) for injecting is provided, and an opening (4) closed by an opening / closing lid (5) is provided at the upper part of the processing tank (3), and the processing tank (3) is provided.
The filler (26) housed inside and the garbage (27) introduced through the opening (4) are fed to the air supply means (19).
While introducing air into the treatment tank (3) by
In the food waste treatment device (1) which agitates and mixes in 1) to aerobically decompose the food waste (27), the filler (2
The heating means (23, 24) for heating 6) and the temperature sensor (22) for measuring the temperature of the filling material (26) are provided, and the garbage (27) in the processing tank (3) is stored. By charging, the stirring device (11) and / or the heating means are operated to heat the filler (26) to 30 to 37 ° C., and then the temperature of the filler (26) is 10 to 15 ° C. or less. Garbage disposal device characterized in that the temperature is controlled so that it does not occur 6. An opening / closing sensor (2) for the opening / closing lid (5).
5) is provided, and when it is detected by the opening / closing sensor (25) that the opening / closing lid (5) closes the opening (4), the stirring device (11) and / or the heating means (23,
24) is characterized in that the operation is started.
The garbage processing device according to claim 5. 7. A cylindrical treatment tank (3) is provided with a stirring device (11) rotated by a vertical rotating shaft (12), and air is introduced into the treatment tank (3) at the bottom of the treatment tank (3). An air supply means (19) for injecting is provided, and an opening (4) closed by an opening / closing lid (5) is provided at the upper part of the processing tank (3), and the processing tank (3) is provided.
The filler (26) housed inside and the garbage (27) introduced through the opening (4) are fed to the air supply means (19).
While introducing air into the treatment tank (3) by
In the food waste treatment device (1) which agitates and mixes in 1) to aerobically decompose the food waste (27), the filler (2
By providing a heating means (23, 24) for heating 6) and a temperature sensor (22) for measuring the temperature of the filling material (26), and by operating a start switch provided at an appropriate position. The filler (26) is heated to 30 to 37 ° C. by operating the stirring device (11) and / or the heating means, and then the temperature of the filler (26) does not fall below 10 to 15 ° C. The garbage processing device is characterized in that the temperature is controlled as described above. 8. The heating means is the air supply means (19).
A heater (24) provided at the air inlet of the device, wherein the air heated by the heater (24) is fed into the treatment tank (3) by the air feeding means (19). The food waste processing device according to claim 5 or 7, 9. The heating means according to claim 5, wherein the heating means is a heater (23) provided in the treatment tank (3) or on the outer surface of the treatment tank (3). Garbage processing equipment