JPH11333427A - Apparatus for treating organic substance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for treating organic substances which can improve accuracy in determining water content and treatment performance. SOLUTION: A water content sensor S to be set in a treatment tank 1 is constituted from a cooling means and a temperature detecting means for detecting a temperature which is decreased corresponding to the water content of a carrier 4 by cooling by the cooling means and equipped with a control means (a control board 28) for detecting the water content of the carrier 4 from a decreased temperature value to be detected by the temperature detecting means with the temperature detecting means cooled for a predetermined length of time. A water content adjusting means for adjusting the water content of the carrier 4 is also provided. The control means controls the water content adjusting means based on the detected water content by using the water content sensor S in order to adjust the water content of the carrier 4 within a range suitable for the activation of microorganisms.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic matter treating apparatus for decomposing organic matter such as garbage with microorganisms.

[0002]

2. Description of the Related Art In general, an organic matter processing apparatus of this type stores a carrier of microorganisms that decompose organic matter (woody small pieces such as sawdust) in a treatment tank and puts organic matter such as garbage into the processing tank. Is decomposed by a microorganism cultured on a carrier. In order to maintain the environment inside the treatment tank suitable for the activation of microorganisms that decompose organic substances, it is necessary to control the temperature, agitation, ventilation, etc. in the tank and adjust the water content of the microorganism carrier mixed with organic substances to an appropriate value. It is important to maintain.

For this purpose, a water content detecting means for detecting the water content of a microorganism carrier mixed with an organic substance is required. However, as is well known, it is difficult to accurately detect this kind of water content.

Japanese Patent Application Laid-Open No. 8-57458 (B09B)
In 3/00), the water content for detecting the water content of the garbage processing material in the processing tank in a processing tank containing a garbage processing material (carrier of microorganisms) for decomposing the garbage. A heating sensor for forcibly causing the sensor to generate heat, and a temperature for detecting a temperature rise due to the moisture content of the garbage disposal material when the heating resistor generates heat. A garbage disposal device comprising a sensor is disclosed.

[0005] The moisture content of the carrier suitable for activating microorganisms varies depending on various conditions such as the size of the treatment tank, but is about 40% to 70% as described in the above-mentioned publication. , Around 60% is optimal. The temperature in the tank (carrier temperature) is about 40 ° C. to 60 ° C. suitable for activating microorganisms.
℃ controlled.

[0006]

SUMMARY OF THE INVENTION
When the water content is low (the heat capacity is small), the temperature tends to rise, and when the water content is high (the heat capacity is large), the temperature hardly rises. However, when the moisture content is detected as described above, the moisture in the carrier near the sensor evaporates due to a rise in the temperature of the heating element, so that the accuracy of detecting the moisture content is reduced accordingly.

[0007] When the detection accuracy of the water content is reduced, the accuracy of the adjustment of the water content by controlling the temperature in the tank, stirring and ventilation is also reduced, and the processing performance of organic matter decomposition is not improved. Raising even a little is an important issue.

Accordingly, the present invention has been made to solve such a problem, and the detection accuracy of the water content can be improved by changing the idea of utilizing the temperature drop opposite to the temperature increase. It is an object of the present invention to provide an organic material processing apparatus capable of improving processing performance.

[0009]

In order to achieve the above object, the present invention relates to a treatment tank for storing a carrier of microorganisms that decompose organic substances and for decomposing organic substances such as garbage to be introduced. A water content sensor for detecting the water content of the carrier in which the organic substance is mixed, and detecting the temperature of the water content sensor according to the water content of the carrier by cooling means and cooling by the cooling means. And a control means for cooling the cooling means for a predetermined period of time and detecting the water content of the carrier from a temperature drop value detected by the temperature detection means. It is characterized by the following.

And a water content adjusting means for adjusting the water content of the carrier, wherein the control means controls the water content adjusting means based on the water content detected by the water content sensor, and Is characterized in that the water content is adjusted within a range suitable for activating microorganisms.

A water content sensor for detecting the water content of a carrier mixed with an organic substance is provided in a treatment tank containing a carrier of microorganisms that decompose the organic substance and decomposing the organic substance such as garbage. The water content sensor comprises a cooling means, and a temperature detection means for detecting a temperature that drops according to the water content of the carrier by cooling by the cooling means, and a carrier using the moisture content sensor. At the time of detecting the moisture content, the cooling means is cooled for a predetermined period of time, and while detecting the moisture content of the carrier from the temperature drop value detected by the temperature sensing means, when the moisture content is not detected, the temperature is reduced. A control means for detecting the temperature in the processing tank using the detection means is provided.

And a heating means for heating the inside of the processing tank, wherein the control means controls the water content based on the water content detected by the water content sensor. Controlling the water content of the carrier to a range suitable for activating microorganisms, and controlling the water content of the carrier based on the temperature in the processing tank detected by using the temperature detection means of the water content sensor. And controlling the temperature in the treatment tank within a range suitable for activating microorganisms.

Further, the moisture content sensor uses a thermoelectric cooling element utilizing the Peltier effect as a cooling means, with a cooling unit side of the cooling element facing the inside of the processing tank via a heat conducting plate, and a radiating unit side. The heat detecting plate is exposed to the outside of the processing tank via a heat conducting plate, and a heat shielding member is arranged between the cooling element and the heat conducting plate on the heat radiating portion side of the heat conducting plate on the cooling unit side. Is attached.

Further, the heat conducting plate on the heat radiating portion side of the cooling element faces an intake passage for sucking outside air into the processing tank.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a vertical cross-sectional view of the organic matter processing apparatus of the present embodiment as viewed from the front, FIG. 2 is a vertical cross-sectional view as viewed from the left side, FIG. 3 is a vertical cross-sectional view as viewed from the right side, and FIG. FIG.

In the present embodiment, a processing tank 1 for decomposing organic substances such as garbage is formed by tightly joining an upper tank 2 and a lower tank 3 which are separately formed of synthetic resin, and is composed of small pieces such as sawdust. , And organic substances such as garbage are introduced from the upper opening.

Sheet heaters 5 and 5 are mounted on the rear side and the front side upper part of the lower tank 3, and the activity of microorganisms in the processing tank 1 is controlled by using a temperature sensor provided in a moisture content sensor S described later. The temperature is controlled so as to be maintained within a temperature range (approximately 40 ° C to 60 ° C) suitable for chemical conversion. These planar heaters 5 are covered with a heat insulating material 6 made of glass wool or the like.
To prevent heat from escaping to the outside. An opening 7 for taking out the treated organic matter is formed on the front side of the bottom surface of the lower tank 3 to which these planar heaters 5 and 5 are not mounted. Further, a water content sensor S according to the present invention is mounted at the center of the side wall in the lower tank 3.

As shown in FIG. 5, the water content sensor S uses a thermoelectric cooling element 50 utilizing the Peltier effect as a cooling means, and the cooling portion side of the cooling element 50 has good thermal conductivity and corrosion resistance of stainless steel or the like. And the heat radiating part side is exposed to the outside of the processing tank 1 via a metal plate 52 having good thermal conductivity such as aluminum, and the cooling unit. Cooling element 50
Further, a heat shield plate 53 is disposed between the metal plate 52 on the side of the heat radiator and a temperature sensor 54 formed of a thermistor or the like is attached. The cooling element 50 and the temperature sensor 54
Lead wires 56 and 57 are connected to a control unit mounted on the control board 28 described later.

By configuring the moisture content sensor S as described above, cooling and heat radiation can be efficiently performed by the Peltier effect, and the temperature sensor 54 can
And the metal plate 52 on the heat dissipating part side is not directly affected by the thermal influence (radiation heat or the like), so that the detection accuracy of the water content can be further improved.

An intake port 58 is formed in the upper case 13 at a position facing the metal plate 52 on the heat radiating section side, which will be described later. An intake flow path 59 for taking in outside air from the intake port 58 into the processing tank 1. The metal plate 52 on the heat dissipating part side of the cooling element 50
It has a configuration that faces. Thereby, the cooling element 5
0 can be effectively used without wasting, and the intake air can be warmed and supplied into the processing tank 1.
Power consumption can be suppressed.

On the other hand, at the upper edge of the upper tank 2, a folded portion 8 is formed by folding an appropriate width inward and opening in a rectangular shape. The folded portion 8 is provided with a plurality of suction ports 9 for sucking outside air into the processing tank 1. Each of the suction ports 9 is connected to a suction port 12 provided on the bottom surface side of the lower case 11 and a heat radiating section side of the cooling element 50 via a suction channel formed between an outer surface of the processing tank 1 and a main body case described later. Intake port 58 formed in upper case 13 facing metal plate 52
Is in communication with

The lower case 11 is made of a synthetic resin and is adapted to mount the processing tank 1 thereon. The upper case 13 covering the processing tank 1 constitutes a main body case. Lower case 1
Legs 14 are formed on both sides of the lower case 11, a gap is formed between the bottom surface of the lower case 11 and the installation surface by the two legs 14, and a stirring motor 15 is provided in one wide leg 14.
Is stored.

The stirring motor 15 is mounted on a metal holding plate 16 mounted on one side of the processing tank 1, and the rotation of the stirring motor 15 is controlled by a speed reduction mechanism 17 also mounted on the holding plate 16. Is decelerated, and the stirring body 18 rotatably disposed in the processing tank 1 is rotationally driven.

The stirrer 18 is intermittently driven to rotate forward and backward by controlling the stirring motor 15 by a control unit described later. For example, it is driven for 2 minutes at a cycle of 30 minutes, and further driven forward and reverse for 1 minute every 2 minutes.

The stirring body 18 penetrates both side walls of the processing tank 1 and is rotatably supported by a bearing 19 fixed to the processing tank 1. And the agitating blades 21.

In the inside of the treatment tank 1, a microbial carrier 4 made of a small piece of sawdust or the like is provided, in which the stirring shaft 20 is completely buried, and the tip of each stirring blade 21 protruding from the stirring shaft 20 is provided. It is stored with a depth (standard level) that protrudes at an appropriate length above the rotation range.

On the other hand, a protruding portion 23 is formed on the periphery of the lower end of the upper tank 2 and is close to the inner wall of the upper case 13, and the deformation of the upper case 13 due to the pressing from the outer surface is prevented by the protruding portion 23 receiving the deformation. It is supposed to.

A charging chute 24 hanging from the top plate of the upper case 13 is inserted into an opening edge formed by the folded portion 8 of the upper tank 2 to form a charging port 25 for the carrier 4 and the organic substance. Have been. The inlet 25 is openably and closably covered by an upper lid 26 attached to the upper surface of the upper case 13 by a hinge or the like, and the open / closed state is detected by a detection unit (not shown).

A sealing member 27 made of an elastic material is mounted on the back surface of the upper cover 26,
The abutment with the five peripheral edges prevents the odor in the processing tank 1 from leaking outside through the inlet 25 and preventing insects and the like from entering the processing tank 1 through the inlet 25.

On the other hand, a control board 28 is mounted on a support plate 29 above the deceleration mechanism 17 via a wide projection 23. One side of the support plate 29 is attached to the folded portion 8 of the upper tank 2, and the other side is supported by support legs 30 formed on the wide protrusion 23. The control board 28 includes a ventilation fan 31 (shown by a broken line in FIG. 3) for forcibly exhausting the air in the processing tank 1, the planar heater 5, the stirring motor 15, and the water content sensor S described above. A control unit including a microcomputer for controlling the cooling element 50 and the like is mounted.

A rib (not shown) is formed on the support plate 29 to separate the control board 28 from the ventilation fan 31.
The rib is in contact with a cover 32 that covers the control board 28 and the ventilation fan 31.

An exhaust port 33 communicating with the inside of the processing tank 1 is formed in the charging chute 24 on the side where the control board 28 is provided, and the air in the processing tank 1 is discharged out of the processing tank 1 therefrom. It has become. A discharge port 34 communicating with the outside is formed on the back side of the upper case 13. The exhaust port 33 and the exhaust port 34 communicate with each other through an exhaust channel 35 formed by the support plate 29, the cover 32, and the like.
The air in the processing tank 1 is discharged to the outside by a ventilation fan 31 provided in the exhaust passage 35.

A filter 36 is removably attached to the exhaust port 33 to prevent inconvenience such as the fine powder of the carrier 4 and the like flying up and scattered by the stirring operation of the stirring member 18 adhering to the ventilation fan 31. .

On the other hand, the opening 7 for taking out the treated organic matter formed on the front side of the bottom surface of the lower tank 3 is closed by a drawer-type shutter 37 so as to be openable and closable. Opening 7
A discharge path 38 is provided in the lower case 11 in the lower part,
By providing an outlet 39 for taking out the carrier 4 in the processing tank 1 in front of the opening 7, the work of taking out the carrier 4 is facilitated. The outlet 39 is openably and closably covered by an outer cover 40.

In the above configuration, when using the present apparatus, a certain amount of the microorganism carrier 4 is charged into the treatment tank 1 in advance. Then, when processing organic matter such as garbage, the upper lid 26 is opened as shown in FIG. 3, and organic matter such as garbage is charged into the processing tank 1 from the inlet 25 and the upper lid 26 is closed. When the upper lid 26 is closed, a detection unit (not shown) detects this, and the control unit mounted on the control board 28 controls the energization of the sheet heater 5, the stirring motor 15, the ventilation fan 31 and the like based on the output. To start.

By controlling the power supply to the stirring motor 15, the stirrer 18 intermittently rotates in the forward and reverse directions to mix and mix the carrier 4 and the organic substance. While maintaining the temperature in an optimum range for activating the microorganisms, organic matter is decomposed into carbon dioxide and water by the microorganisms cultured on the carrier 4 and composted.

Further, by controlling the energization of the ventilation fan 31, the humid air in the processing tank 1 is discharged to the outside, and
The inside of the processing tank 1 is prevented from being brought into a high humidity state, and the air in the processing tank 1 is discharged to the outside.
2 is formed on the side surface of the upper case 13 so as to face the outside case, and the outside air is taken into the main body case through the suction port 58, and oxygen necessary for activating microorganisms is introduced into the processing tank 1 from the suction port 9 formed in the upper part of the processing tank 1 Supply.

Next, a control example for detecting and adjusting the water content characteristic of the present invention will be described with reference to a flowchart shown in FIG. Note that the control shown in this flowchart is called up and executed periodically (for example, a fixed time after the stirring operation of the stirring body 18 is stopped) from the main control flow of the present apparatus.

When the control is started, first, the water content (temperature drop value ΔT) is detected using the water content sensor S (step 101).

In the detection of the water content, first, before cooling the cooling element 50 of the water content sensor S, the temperature sensor 54 is cooled.
To detect the temperature inside the tank. Then, the cooling element 50 is cooled for a predetermined time. By detecting the temperature with the temperature sensor 54 after a lapse of a fixed time, and subtracting this detected temperature from the temperature in the bath detected before the cooling,
A temperature drop value ΔT corresponding to the water content of the carrier 4 is calculated.
Note that the relationship between the temperature decrease value ΔT and the water content% by cooling the cooling element 50 for a predetermined time is detected and set in advance by experiments and the like.

As described above, by detecting the water content (temperature drop value ΔT) of the carrier 4 by utilizing the temperature drop by the cooling element 50, the evaporation of water near the water content sensor S can be suppressed. In addition, the detection accuracy is improved as compared with the conventional moisture content detection using the temperature rise.

When the temperature drop value ΔT corresponding to the water content is detected, whether the temperature drop value ΔT is equal to or smaller than a predetermined first set value a (ΔT ≦ a), or from the first set value a Is larger than the second set value b (ΔT ≧ b) or larger than the first set value a and smaller than the second set value b (a <ΔT <b) (decision 10).
2). Here, the first set value a is set to a value corresponding to the upper limit (70%) of the water content suitable for activating the microorganism, and the second set value b is set to the value for activating the microorganism. A value corresponding to the lower limit (40%) of a suitable moisture content is set.

In the above, if the temperature decrease value ΔT is equal to or less than the first set value a, that is, if the water content is 70% or more (ΔT ≦ a in the judgment 102), it is determined that the water content is large.
In order to reduce the water content, the heating temperature of the on-surface heater 5 and the air volume of the ventilation fan 31 which also function as the water content adjusting means are increased, and the stirring period of the stirring body 18 is shortened (process 103). By doing so, the water generated by the decomposition treatment of the organic matter is more likely to evaporate, so that the water content is reduced.

On the other hand, if the temperature decrease value ΔT is equal to or more than the second set value b, that is, if the water content is 40% or less (ΔT ≧ b in decision 102), it is determined that the water content is small, and the water content is determined to be small. , The heating temperature of the surface heater 5 and the air volume of the ventilation fan 31 are reduced (step 104). This makes it difficult for the water generated by the decomposition treatment of the organic substance to evaporate, thereby acting to increase the water content.

The temperature drop value ΔT is equal to the first set value a.
Is larger than the second set value b, that is, if the water content is in the range of 40% to 70% (judgment 10
2 <a><T<b), it is determined that the water content is in the middle, and in order to maintain this water content, the heating temperature of the surface heater 5 and the ventilation fan 3
The air flow of No. 1 and the stirring cycle of the stirring body 18 are each operated as a standard (process 105). By doing so, the water generated by the decomposition treatment of the organic matter evaporates appropriately, so that the water content of the carrier 4 is reduced to the target water content of 6 during the standard operation.
It is adjusted to around 0%.

The control as described above is performed according to the present invention.
This is made possible by increasing the detection accuracy of the water content, whereby the water content of the carrier 4 can be adjusted with high accuracy, and therefore, the processing performance of organic matter decomposition can be improved.

In the present embodiment, a dedicated temperature for controlling the planar heater 5 to control the temperature in the processing tank 1 to a temperature suitable for activating microorganisms (about 40 ° C. to 60 ° C.). No sensor is provided and the water content sensor S
The temperature sensor 54 is commonly used. That is, independently of the moisture content detection described above, when the moisture content detection is not performed, the control unit reads the temperature in the tank detected by the temperature sensor 54 of the moisture content sensor S as needed, and performs the same process as in the related art. By controlling ON / OFF of the heater 5, the temperature in the processing tank 1 is adjusted to a temperature (about 40 ° C.) suitable for activating microorganisms.
〜60 ° C.). As described above, by sharing the temperature sensor 54 for detecting the water content for detecting the temperature in the tank, the cost of the apparatus can be reduced.

In the above embodiment, as the water content adjusting means, a heating means (surface heater 5), a stirrer 18 and a ventilation fan 3 generally provided in this type of organic material processing apparatus are used.
Although 1 is used, for example, a water supply means or the like for the purpose of only adjusting the water content may be provided more positively.

[0050]

As described above, according to the present invention, the water content sensor is constituted by the cooling means and the temperature detecting means for detecting the temperature which drops according to the water content of the carrier by cooling by the cooling means. At the same time, by providing a control means for cooling the cooling means for a predetermined period of time and detecting the moisture content of the carrier from the temperature drop value detected by the temperature detection means, moisture evaporation near the moisture content sensor is suppressed. As a result, the detection accuracy of the water content can be increased accordingly.

The apparatus further comprises a water content adjusting means for adjusting the moisture content of the carrier, and the control means controls the moisture content adjusting means based on the moisture content detected by using the moisture content sensor, thereby controlling the moisture content of the carrier by microorganisms. The water content of the carrier can be adjusted with high accuracy, and the processing performance of organic matter decomposition is improved.

Further, the water content sensor comprises cooling means and temperature detecting means for detecting a temperature falling according to the water content of the carrier by cooling by the cooling means. At the time of detecting the moisture content, the cooling means is cooled for a predetermined period of time, and while detecting the moisture content of the carrier from the temperature drop value detected by the temperature sensing means, when the moisture content is not detected, the temperature sensing means is turned on. As described above, by providing the control means for detecting the temperature in the treatment tank, the evaporation of water near the moisture content sensor is suppressed, and accordingly, the detection accuracy of the moisture content can be increased and the moisture content detection can be performed. Can be shared for detecting the temperature in the tank, and the cost can be reduced.

Further, there is provided a moisture content adjusting means for adjusting the moisture content of the carrier and a heating means for heating the inside of the treatment tank, and the control means controls the moisture content adjusting means based on the moisture content detected by the moisture content sensor. Then, while adjusting the water content of the carrier to a range suitable for the activation of microorganisms, and controlling the heating means based on the temperature in the processing tank detected using the temperature detecting means of the water content sensor, the inside of the processing tank Temperature is controlled within a range suitable for the activation of microorganisms, so that the moisture content of the carrier can be adjusted with high accuracy as described above, and the temperature in the treatment tank can be controlled at low cost. it can.

The moisture content sensor uses a thermoelectric cooling element utilizing the Peltier effect as a cooling means, with the cooling part side of the cooling element facing the inside of the processing tank via a heat conducting plate, and the heat radiation part side. By facing the outside of the processing tank via the heat conductive plate, the heat conductive plate on the cooling unit side, a heat shielding member is disposed between the cooling element and the heat conductive plate on the heat radiating unit side, and the temperature detecting means is attached. Therefore, cooling and heat dissipation using the Peltier effect can be performed efficiently, and the temperature detection means is not directly affected by the thermal effect of the cooling element and the heat conducting plate on the heat radiating part side. Can be further improved.

Further, the heat conduction plate on the side of the heat radiating portion of the cooling element faces the intake passage for sucking outside air into the processing tank, so that the heat radiation (exhaust heat) of the cooling element is effectively prevented from being wasted. Since the intake air can be used and heated and supplied into the processing tank, power consumption can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an organic material processing apparatus according to an embodiment of the present invention as viewed from the front.

FIG. 2 is a vertical sectional view of the same seen from the left side.

FIG. 3 is a vertical sectional view of the same seen from the right side.

FIG. 4 is also a top view.

FIG. 5 is a longitudinal sectional view showing the internal configuration of the moisture content sensor of the embodiment.

FIG. 6 is a flowchart illustrating a control example of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing tank 2 Upper tank 3 Lower tank 4 Carrier 5 Planar heater 9 Suction port 11 Lower case 12 Suction port 13 Upper case 15 Stirring motor 17 Reduction mechanism part 18 Stirrer 20 Stirrer shaft 21 Stirrer blade 25 Input port 26 Upper lid 28 Control board (control means) 31 Ventilation fan S Moisture content sensor 50 Thermoelectric cooling element 51, 52 Metal plate 53 Heat shield plate 54 Temperature sensor 58 Intake port 59 Intake flow path

Claims (6)

[Claims] A water content sensor for detecting the water content of a carrier mixed with an organic substance is provided in a treatment tank containing a carrier of a microorganism that decomposes an organic substance and decomposing the organic substance such as garbage to be charged. The water content sensor comprises: a cooling unit; and a temperature detection unit configured to detect a temperature that decreases according to the water content of the carrier due to cooling by the cooling unit. An organic substance processing apparatus, comprising: a control unit that cools for a time and detects a moisture content of the carrier from a temperature drop value detected by the temperature detection unit. 2. The apparatus according to claim 1, further comprising a moisture content adjusting means for adjusting a moisture content of the carrier, wherein the control means controls the moisture content adjusting means based on the moisture content detected by using the moisture content sensor, and The organic matter treating apparatus according to claim 1, wherein the water content of the organic matter is adjusted within a range suitable for activating microorganisms. 3. A water content sensor for detecting a water content of a carrier mixed with an organic substance is provided in a treatment tank containing a carrier of a microorganism that decomposes organic substances and decomposing organic substances such as garbage to be charged. The water content sensor comprises a cooling unit, and a temperature detection unit configured to detect a temperature falling according to a water content of the carrier by cooling by the cooling unit, and a carrier using the moisture content sensor. At the time of detecting the moisture content, the cooling means is cooled for a predetermined period of time, and while detecting the moisture content of the carrier from the temperature drop value detected by the temperature sensing means, when the moisture content is not detected, the temperature is reduced. An organic substance processing apparatus, comprising: a control unit that detects a temperature in a processing tank using a detection unit. 4. A water content adjusting means for adjusting the water content of the carrier and a heating means for heating the inside of the processing tank, wherein the control means is configured to control the water content based on the water content detected by using the water content sensor. Controlling the water content of the carrier to a range suitable for activating microorganisms, and controlling the water content of the carrier based on the temperature in the processing tank detected by using the temperature detection means of the water content sensor. The organic matter treatment apparatus according to claim 3, wherein the temperature in the treatment tank is controlled within a range suitable for activating microorganisms. 5. The moisture content sensor uses a thermoelectric cooling element utilizing a Peltier effect as a cooling means, and has a cooling unit side of the cooling element facing a processing tank via a heat conductive plate, and a heat radiation unit side. The heat detecting plate is exposed to the outside of the processing tank via a heat conducting plate, and a heat shielding member is arranged between the cooling element and the heat conducting plate on the heat radiating portion side of the heat conducting plate on the cooling unit side. The organic matter treating apparatus according to any one of claims 1 to 4, further comprising: 6. A heat conduction plate on a heat radiating portion side of the cooling element,
6. The organic matter treatment apparatus according to claim 5, wherein the treatment tank faces an intake passage through which outside air is sucked.