JPH09174025A - Garbage treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the treatment of a garbage to be started promptly and, at the same time, inhibit the generation of a smell by providing an air blowing means for supplying air into a garbage treating tank and thereby controlling an air blowing rate in such a manner that it is less than a routine air blowing rate for a specified period of time after the start of using this garbage treating device and is set back to the routine air blowing rate after the lapse of the specified period of time. SOLUTION: An air blowing rate set to an air blowing fan is controlled by a control part. That is, an air flow to be supplied until the decomposition of a garbage in a garbage treating tank is started from the start of using this garbage treating device is less than a routine air flow, and after the start of the decomposition process, the air flow is set to the specified rate. In other words, during the period until the decomposition process is regularly started, the air flow is, for example, set to about 10-20 liters/min and after the start of the decomposition process, the air flow is, for example, set to about 60-80 liters/min. Consequently, the degree of the rise in the internal temperatures of the tank is negligible on a first day after the start of using the device and is really significant after the lapse of the whole first day. Therefore, the internal temperatures of the tank increase from the early stage of the operation as the loss of a latent heat is insignificant. Besides, the generation of CO2 or NH3 is started rapidly.

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 using the power of microorganisms.

[0002]

2. Description of the Related Art Conventionally, it has been practiced to decompose (ferment) food waste containing organic substances and water by using microorganisms to the extent that it does not affect the environment. It has been known. In this food waste processing device, a wood chip called a biochip (for example, Japanese Patent Publication No. 2-30760) is filled in a processing tank as a food waste processing material. Then, the garbage is put into the treating tank through the charging port provided in the treating tank, the stirring means is used to mix the treating material with the garbage, and the heating means and the blowing means are used to bring them into contact with air. Then, the garbage is decomposed by the microorganisms that live in the garbage processing material, the water is evaporated at the same time, and the exhaust gas is exhausted to the outside by the exhaust fan. In addition, the environment for treating food waste in the food waste treatment tank has been performed by controlling the heater, blower fan, stirring blades, exhaust fan, and the like.

By the way, when the above treatment is performed, air is sent from the outside into the garbage treatment tank to supply oxygen to the microorganisms and remove water, but conventionally, the air flow rate is as shown in FIG. 5 (a).
As shown in, the air flow rate was constant from the start of use.
In other words, if the amount of raw garbage processing material is 30 liters, once a day 1
When Kg of garbage was added, the air flow rate was 60 to 80 liters / min.

[0004]

However, the above-mentioned conventional example
Since a predetermined amount of air is blown from the beginning of use,
As shown in Fig. 5 (b), the temperature in the bath is from use to 2 days.
There is no temperature rise due to the loss of latent heat during
The temperature is close, and after a few days, a minute standing below 5 ° C
There is a rise and the temperature rises after 3 to 4 days
Ri occurs. Therefore CO_TwoGeneration of microbial growth
Since the speed is slow, it becomes as shown in FIG. Thus use
Initially, there was a problem that food waste was hardly decomposed.
You. Also NH _ThreeThe generated amount is as shown in Fig. 5 (d).
The residue accumulated before the biological treatment started
After standing up, it decomposes all at once, so if the odor becomes strong
There is a problem.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to speed up the start-up of processing and suppress the generation of odor.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the garbage disposal A according to the present invention is one in which the garbage is decomposed by the garbage treating material placed in the garbage treating tank 1. An air blower for supplying air is provided in the treatment tank 1 so that the amount of air blown is smaller than the normal air flow for a predetermined period from the start of use and becomes the normal air flow after the predetermined period has passed. A control unit 2 for controlling is provided. In other words, by controlling the air flow rate to be small at the beginning of use, the temperature inside the tank rises faster and the decomposition process can be accelerated, and the residue is not decomposed all at once, and the generation of odor is suppressed. be able to.

Further, it is preferable that the amount of air blown is controlled until the rise detection of the decomposition process in the tank is detected. In this case, the amount of air blown can be reduced until it is detected that the temperature inside the tank has risen or the amount of CO ₂ generated has risen and the decomposition process has risen. Therefore, the air flow rate can be controlled appropriately.

It is also preferable that the air flow rate is controlled so as to decrease until a predetermined set time elapses from the start of use. In this case, the amount of air blown can be reduced from the start of use to the set time, and after the set time has elapsed, the air flow can be controlled to a predetermined amount, and the control structure can be simplified by controlling the time. Further, it is also preferable to control so that the amount of air blown is reduced when food waste is thrown in the middle of the process. When it detects that the lid for throwing food waste is opened or when the weight of food waste is detected to detect the input of food waste, the amount of air blown is reduced to radiate heat from the tank. The amount can be reduced to accelerate the decomposition process.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing the entire food waste processing apparatus, in which a food waste processing tank 1 having an upper opening in a case 3 having an upper opening of the food waste processing apparatus A is shown. The raw garbage processing tank 1 is internally rotatably provided with a stirring blade 4 which constitutes a stirring means. The stirring blade 4 is rotated by the motor 5, and the rotation of the motor 5 is controlled by the controller 2.

The upper end opening of the case 3 serves as a loading port, and a lid 6 for loading food waste is provided in the loading port, which is rotatable about a shaft mounting portion at the rear end and can be opened and closed. There is. An air passage 7 is provided at the opening edge of the upper end of the case 3, and one end of the air passage 7 is opened to the outside of the case 3 and the other end is opened to the upper end opening of the garbage processing tank 1. ing. A blower fan 8 and a heater 9 are provided inside the blower path, and the blower fan 8 and the heater 9 are controlled by signals from the control unit 2.

An exhaust passage 10 is provided in the case 3,
The exhaust passage 10 has one end opening to the upper end opening of the garbage processing tank 1 and the other end opening to the outside of the case 3. An exhaust fan 11 is installed inside the exhaust passage 10, and the exhaust fan 11 is controlled by a signal from the control unit 2. A planar heater 12 is provided on the lower outer surface of the food waste processing tank 1, and is controlled by a signal from the controller 2.

In the garbage disposal tank 1, there is placed a garbage disposal material such as sawdust-like wood chips called a biochip in which microorganisms inhabit. As this food waste treating material, a conventionally known wood strip (for example, Japanese Patent Publication No. 2-30760)
Can be used. The garbage processing device A is provided with a weight sensor 13 for detecting the weight of the garbage thrown into the garbage processing tank 1. The weight sensor 13 is adapted to detect the weight of the raw garbage processing tank 1 containing the raw garbage processing material. The raw garbage is put into the raw garbage processing tank 1 before being put into the raw garbage by the weight sensor 13. By comparing the weight of the treatment tank 1 with the weight of the raw garbage treatment tank 1 after the introduction, the amount of the introduced raw garbage can be obtained. In the case of this example, the raw garbage processing tank 1 is supported by three legs 14, and a weight sensor 13 is provided on each of the three legs 14, and the weight data obtained by the weight sensor 13 is used as the control unit. Two
Is entered.

[0013] In the processing of food waste, food waste is put into the food waste treatment tank 1 with the food waste treating material in the inlet, the lid 6 is closed, and the stirring blade 4 is rotated intermittently. Stir and mix the food waste treatment material and the food waste. In addition, the blower fan 8 is operated to supply the outside air into the garbage processing tank 1 to supply oxygen to the microorganisms. In addition, the heaters 9 and 12 are energized to heat the inside of the garbage processing tank 1 and further CO generated by decomposition
Exhaust ₂ and NH ₃ and humidity from the exhaust fan 11.

The amount of air blown by the blower fan 11 is controlled by the controller 2 as follows. FIG. 3 (a)
As shown in (1), a small amount of air is blown from the start of use until the decomposition treatment in the tank rises, and after the decomposition treatment rises, a predetermined amount of air is blown. That is, the air is blown at a blow rate of, for example, about 10 to 20 liters / min until the decomposition process is started, and is blown at a blow rate of, for example, about 60 to 80 liters / min after the decomposition process is started. As a result, as shown in FIG. 3 (b), the temperature in the tank rises slightly from the start of use to the first day,
After one day, a rise occurs. As a result, the latent heat loss is small and the temperature inside the tank rises from the beginning. As the temperature rises, the growth rate of microorganisms increases, and the amount of CO ₂ generated also rises faster as shown in FIG. 3 (c).
Further, the amount of NH ₃ generated also rises quickly as shown in FIG. At this time, the decomposition process starts up quickly and there are few residues, so there is little odor even when starting up. As described above, when the decomposition process is started up, the air flow rate can be switched so as to increase. However, this rising up can be detected by, for example, temperature rise in the tank (outside air temperature +5 to 10 ° C) or CO.
_This is done by detecting the decomposition based on changes in the amount of ₂ and NH ₃ generated. Further, instead of the rise detection as described above, the air flow rate may be switched according to a set time. That is, the set time may be set to a time at which it is expected that the decomposition will start, and the air flow rate may be switched by the timer or the like when the set time (at least 24 hours or more) is reached.

FIG. 4 shows another control. In this case, when the peak of decomposition processing of food waste is detected, the air flow rate is increased. For example, 5 to 20 liter /
The air is blown with a small air flow rate of, for example, 6 hours, and when it reaches a peak, it is sent with an air flow rate of 60 liters / min or more. By reducing the amount of air blown until the peak of the decomposition process, heat loss is reduced and the peak temperature is also raised (45 to 55 ° C). Further, as the temperature rises, the reaction rate also improves, so the peak arrival time is shortened and the decomposition rate is improved (70-80%). Similarly, the processing capacity is improved. After the peak is detected, the air flow rate is increased to remove the accumulated water. The peak of the decomposition process is detected by detecting a decrease in the temperature in the tank, a decrease in the amount of CO ₂ generated, and a timer (6 to 8 hours). Also, when the input of food waste is detected while the air flow rate is increasing, the air flow rate is again reduced to about 5 to 20 liters / min. This reduces heat dissipation loss and accelerates the disassembly process. The detection of the input of garbage is performed by opening the lid 6 or detecting the weight increase by the weight sensor 13. When the water content sensor controls the water content at a high water content, this control is prioritized to increase the air flow rate.

[0016]

As described above, the present invention is provided with the air blowing means for supplying air into the garbage processing tank, and the air blowing amount is less than the normal air blowing amount during the predetermined period from the start of use and the predetermined amount. Since a control unit is provided to control the air flow rate to reach the normal air flow rate after a certain period of time, by controlling the air flow rate to be small at the beginning of use, the temperature inside the tank rises faster and decomposes. The treatment can be done quickly, the residue can be prevented from decomposing at once, and the generation of odor can be suppressed. Also, the energy required for blowing air can be reduced and the energy required for heating to accelerate the treatment. The energy consumption can be reduced as well.

According to the second aspect of the present invention, since the amount of air blown is controlled until the rise detection of the decomposition process in the tank is detected, the temperature in the tank rises. , The amount of air blown can be reduced until the decomposition process is started up due to an increase in the amount of CO ₂ generated, and after that, it can be controlled so as to reach a predetermined amount of air flow, and the amount of air blown can be appropriately controlled. Is.

Further, in the invention according to claim 3 of the present invention, since the air flow rate is controlled so as to decrease until a predetermined set time from the start of use, the start of use to the set time is reached. The amount of air blown can be reduced, and after a set time has elapsed, control can be performed so that the amount of air blown is a predetermined amount, and the control structure can be simplified by temporally controlling. Further, in the invention according to claim 4 of the present invention, since it is controlled so that the amount of air blown is reduced when the garbage is put in the middle, it is detected that the lid for putting the garbage is opened. When the increase in the weight of food waste is detected and the input of food waste is detected, the amount of air blown can be reduced to reduce the heat radiation from the tank and accelerate the decomposition process.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the entire garbage processing apparatus of the present invention.

FIG. 2 is a control block diagram of the above.

FIG. 3 is a graph illustrating the control of the above.

FIG. 4 is a graph illustrating control of another example of the above.

FIG. 5 is a graph illustrating control of a conventional example.

[Explanation of symbols]

 A Garbage Disposal Equipment 1 Garbage Disposal Tank 2 Control Section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideaki Yamada Inventor Hideaki Yamada 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Ltd. (72) Toshiaki Sato, 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. 72) Inventor Shigeyuki Yamaguchi 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (4)

[Claims] 1. A food waste processing apparatus for decomposing food waste by a food waste processing material placed in the food waste processing tank, wherein a blowing means for supplying air into the food waste processing tank is provided.
The garbage disposal is characterized by comprising a control unit for controlling the amount of air blown to be smaller than the normal amount of air for a predetermined period from the start of use and to be the normal amount of air after a predetermined period. apparatus. 2. The garbage processing device according to claim 1, wherein the amount of air blown is controlled until the rise of the decomposition process in the tank until the rise is detected. 3. The garbage processing device according to claim 1, wherein the amount of air blown is controlled to decrease until a predetermined set time elapses from the start of use. 4. The method according to claim 1, wherein the amount of air blown is reduced when food waste is thrown in the middle of the process.
The described garbage processing device.