JP7779541B2 - Bacteria bed treatment device, bacteria bed sterilization system, and bacteria bed sterilization method - Google Patents

Description

The present invention relates to a mushroom bed treatment device, a mushroom bed sterilization system, and a mushroom bed sterilization method that are suitable for efficiently sterilizing, cooling, and other treatments on mushroom beds used for artificial cultivation.

Recently, when artificially cultivating mushrooms such as shiitake and maitake, mushroom bed cultivation bags made of plastic film are used.

When artificially cultivating mushrooms using this type of mushroom bed cultivation bag, the bag is first filled with an artificial medium (mushroom bed) made by mixing a wood substrate such as sawdust with a nutrient source such as rice bran and adjusting the moisture content, and the bag is then sterilized using high-pressure steam or the like. Mushroom spawn is then inoculated into the mushroom bed and cultured.

In the conventional process of sterilizing mushroom beds, workers place a large number of mushroom beds in a heat sterilization oven, arranging them lengthwise and widthwise on a sterilization shelf or the like, and then seal the oven. High-temperature steam at approximately 100-120 degrees Celsius generated by a boiler is then poured into the oven, and the mushroom beds are heat-sterilized by the steam for a predetermined period of time (see, for example, Patent Document 1).

Furthermore, after the heat sterilization process, the mushroom bed needs to be cooled to a temperature where it can be inoculated with mushroom fungi, so workers remove the mushroom bed from the heat sterilization tank and transport it to a cooling facility where the mushroom bed is cooled at room temperature or in a low-temperature environment for the cooling process.

Japanese Patent Application Laid-Open No. 2009-207456

However, with conventional methods of sterilizing mushroom beds using heat sterilization boilers, the steam sterilization process takes a long time, about 4 to 10 hours. Furthermore, the cooling time in the cooling facility also takes about 8 to 12 hours. Therefore, the sterilization and cooling process after filling the mushroom beds into cultivation bags often takes about half a day to two days, which is inefficient and requires high fuel costs, resulting in poor economics.

In addition, because it is more time- and fuel-efficient to process multiple mushroom beds at once, heat sterilization vessels and cooling facilities require relatively large installation spaces and the costs of the equipment and facilities are high.

Furthermore, workers must carry a large number of mushroom beds into and out of heat sterilization ovens and cooling facilities, which creates the problem of cumbersome work, time, and labor costs.

The present invention has been made to solve the above-mentioned problems, and aims to provide a bacterial bed treatment device, a bacterial bed sterilization system, and a bacterial bed sterilization method that can sterilize or cool a bacterial bed efficiently in a short amount of time.

To solve the above problem, the bacterial bed treatment device of the present invention comprises an insertion processing means having an insertion section that is inserted into a bacterial bed filled in a container and that heats or cools the bacterial bed from the inside via the insertion section, and a drive device that moves the bacterial bed and the insertion section relative to each other to insert and remove the insertion section from the bacterial bed. The drive device may be configured to move the insertion section to insert it into the bacterial bed, or may be configured to move the bacterial bed side toward the insertion section to insert it into the bacterial bed.

The insertion processing means may also have a steam injection mechanism that injects heated steam into the fungal bed while the insertion part is inserted into the fungal bed.

The insertion section may also have a nozzle section that passes heated steam through it and sprays steam from multiple steam injection holes.

The insertion processing means may also have a cooling mechanism for cooling the insertion section.

The insertion section may be formed of a rod-shaped body, and the drive device may have a linear motion mechanism that moves the insertion section linearly along the longitudinal direction of the insertion section. The linear motion mechanism may be configured, for example, by an actuator such as a cylinder with a piston rod.

The system may also include a sealed booth in which an enclosed storage space is formed to store the fungal bed, and the insertion unit may be installed inside the sealed booth.

The enclosed booth may further include a bacterial bed holding means for holding the bacterial bed at a position corresponding to the insertion section.

The bacterial bed holding means may also have a cooling member applied to the outer surface of the bacterial bed.

The insertion section may also be provided with a temperature measuring means for measuring the temperature of the fungal bed.

Furthermore, the bacterial bed sterilization system of the present invention comprises a bacterial bed sterilization device having an insertion section that is inserted into and removed from a bacterial bed filled in a container via a drive device and equipped with an insertion processing means that heat-sterilizes the bacterial bed from the inside via the insertion section; a bacterial bed cooling device having a second insertion section that is inserted into and removed from the bacterial bed via a second drive device and equipped with a second insertion processing means that cools the bacterial bed from the inside via the second insertion section; and a transport device that transports the bacterial bed from the bacterial bed sterilization device to the bacterial bed cooling device.

Furthermore, the bacterial bed sterilization method of the present invention includes a steam sterilization step in which an insertion portion of an insertion processing means equipped with a steam injection mechanism for injecting heated steam is inserted into the bacterial bed filled in a container, and heated steam is injected into the interior of the bacterial bed through the insertion portion for a predetermined period of time, thereby sterilizing the bacterial bed.

Furthermore, after the steam sterilization step, the method may further include a cooling step of cooling the bacterial bed by inserting a second insertion part cooled by a cooling means into the bacterial bed for a predetermined period of time.

The bacterial bed treatment device of the present invention includes an insertion processing means having an insertion section that is inserted into a bacterial bed filled in a container and that heats or cools the bacterial bed from the inside via the insertion section, and a drive device that moves the bacterial bed and the insertion section relative to each other to insert or remove the insertion section from the bacterial bed.By heating or cooling the bacterial bed from the inside, the bacterial bed can be heat-sterilized or cooled highly efficiently in a short period of time. Furthermore, the device can be made smaller, saving space, and can be manufactured at low cost.

The bacterial bed sterilization system of the present invention also comprises a bacterial bed sterilization device having an insertion section that is inserted into and removed from a container filled with bacterial beds via a drive device and is equipped with insertion processing means that heat-sterilizes the bacterial beds from the inside via the insertion section; a bacterial bed cooling device having a second insertion section that is inserted into and removed from the bacterial beds via a second drive device and is equipped with second insertion processing means that cools the bacterial beds from the inside via the second insertion section; and a transport device that transports the bacterial beds from the bacterial bed sterilization device to the bacterial bed cooling device. This significantly reduces the labor required by operators and enables the bacterial beds to be sterilized efficiently in an extremely short time.

FIG. 1 is a schematic explanatory diagram of a bacterial bed sterilization device according to a first embodiment of the present invention. FIG. 3 is an explanatory diagram of the operation of the bacteria bed treatment device of FIG. 2. FIG. 10 is a schematic explanatory diagram of a bacterial bed sterilization device according to a second embodiment of the present invention. FIG. 1 is a schematic explanatory diagram showing a bacterial bed sterilization system according to one embodiment of the present invention.

The present invention will be described in more detail below using preferred embodiments. However, the following embodiments are merely examples of how the present invention is realized, and the present invention is not limited to these.

The mushroom bed treatment device, mushroom bed sterilization system, and mushroom bed sterilization method of the present invention can be used, for example, when carrying out sterilization or other treatments on mushroom beds for artificial cultivation that are packed into bags or bottle-shaped containers.

Figures 1 and 2 show a first embodiment of a bacterial bed treatment device of the present invention. As shown in Figures 1 and 2, the bacterial bed treatment device 1 of this embodiment comprises an insertion processing means 2 having an insertion portion 21 for inserting into the bacterial bed FB, and a drive device 3.

In this embodiment, the fungal bed FB to be treated is filled into a container CT, which is a bag for fungal bed cultivation made of a plastic film such as polyethylene or polypropylene, and treated in that state.

The mushroom bed FB is made by mixing a wood substrate such as sawdust with nutrients such as rice bran to adjust the moisture content, then mechanically filling the container CT using a conventional filling machine and molding it into a block. The mushroom bed FB may also be filled into a relatively hard container such as a bottle-shaped container and molded into a block.

In this embodiment, an example will be described in which the bacterial bed treatment device 1 is implemented as a bacterial bed sterilization device 11 that heat-sterilizes a bacterial bed.

As shown in FIG. 1, the bacterial bed treatment device 1 has a sealed booth 4 that houses the bacterial bed FB. The sealed booth 4 forms a storage space 41 that stores the bacterial bed FB in a sealed manner by placing the bacterial bed FB on its underside. The storage space 41 is provided with a size large enough to accommodate, for example, multiple bacterial beds FB arranged in a row, and with a height large enough to allow an insertion unit 21 to be installed above the bacterial bed FB. The multiple bacterial beds FB may be arranged in a row, a matrix, or any other desired arrangement within the sealed booth 4.

The sealed booth 4 is fitted with components such as the insertion processing means 2 and drive device 3. The floor of the sealed booth 4, on which the fungal bed FB is placed, is made up of the transport device 5 described below. An entrance shutter 42 and an exit shutter 43 are provided on a pair of opposing side walls of the sealed booth 4, and can be opened and closed.

The entrance shutter 42 and the exit shutter 43 are shutters that move up and down to open and close under control of, for example, the control unit 6. The entrance shutter 42 and the exit shutter 43 move up and down using a conventional lifting mechanism that utilizes, for example, a motor or cylinder, to open and close the side walls of the sealed booth 4.

The transport device 5 is a means for transporting the fungal bed FB in one direction D while it is placed on the transport device, and stopping it at a predetermined position such as the sealed booth 4. The transport device 5 is, for example, a metal belt conveyor, and is controlled by the control unit 6 to feed the fungal bed FB at an intermittent pitch.

The insertion processing means 2 is a sterilization means that heat-sterilizes the bacterial bed FB from the inside via the insertion part 21.

The insertion processing means 2 has an insertion part 21 that is inserted into the fungal bed FB, and a steam injection mechanism 22 that injects heated steam into the fungal bed while the insertion part 21 is inserted into the fungal bed FB.

The insertion part 21 consists, for example, of a hollow stainless steel rod that is hollow to allow steam to flow inside. One end of the insertion part 21 is tapered so that it can be inserted into the fungal bed FB in a piercing manner, and the part that is inserted into the fungal bed FB has multiple steam injection holes drilled therein for ejecting steam, forming the nozzle part 21a.

The insertion unit 21 is installed in a hanging position with its longitudinal direction facing up and down at the upper side of the storage space 41 of the sealed booth 4, and its upper end is connected to and supported by the drive unit 3. That is, in this embodiment, the insertion unit 21 is configured to be inserted in a piercing manner from above the fungal bed FB, and a nozzle unit 21a that is inserted into the fungal bed FB is formed on the lower end.

The insertion units 21 are arranged side by side and assembled to the drive unit 3 so that multiple units can be inserted into one bacterial bed FB. In this embodiment, multiple bacterial beds FB are accommodated within the storage space 41 of one sealed booth 4, so multiple sets of insertion units 21 are arranged for each bacterial bed FB.

The insertion section 21 is provided with a temperature measuring means 7 that measures the temperature of the fungal bed FB when it is inserted into the fungal bed FB. The temperature measuring means 7 consists, for example, of a temperature sensor with an element attached to the tip of a wire. The temperature measuring means 7 is electrically connected to the control section 6 and passes temperature data to the control section 6.

The steam injection mechanism 22 includes, for example, a boiler 221 for generating steam, an air supply pipe 222 for sending heated steam generated by the boiler 221 to the insertion section 21, and the nozzle section 21a of the insertion section 21 described above.

The boiler 221 can be a conventional boiler that heats water to generate high-pressure or normal-pressure steam, and sends the steam to the insertion section 21 via the air supply pipe 222.

The air supply pipe 222 connects the boiler 221 and the insertion section 21, and controls the supply or stop of steam to the insertion section 21 via an on-off valve controlled by the control section 6. The air supply pipe 222 may be made of a flexible pipe or the like to accommodate the up and down movement of the insertion section 21.

The drive device 3 is a drive means that moves the fungal bed FB and the insertion part 21 relative to each other, inserting or removing the insertion part 21 into or from the fungal bed.

In this embodiment, the drive device 3 inserts and removes the insertion section 21 by moving it up and down relative to the fungal bed FB placed on the transport device 5. The drive device 3 may also be configured to move the fungal bed side and insert it into the insertion section 21.

The drive unit 3 has an actuator such as a cylinder 31, which may be electrically or hydraulically driven, and is attached to the upper wall of the sealed booth 4. The drive unit 3 has a movable piston rod of the cylinder attached to the upper end of the insertion section 21, which is positioned inside the sealed booth 4.

The drive unit 3 moves the insertion unit 21 up and down in a vertical direction by linearly reciprocating the movable piston rod 32 of the cylinder 31 up and down, and inserts and removes the nozzle unit 21a at the lower end of the insertion unit 21 from above the fungal bed FB. In other words, the drive unit 3 has a linear motion mechanism that moves the insertion unit 21 linearly along the longitudinal direction of the insertion unit 21.

As shown in Figure 2, the drive device 3 is set to an insertion depth such that the tip of the insertion portion 21 stops at a position approximately 10 mm above the bottom end of the bacterial bed FB.

Furthermore, in this embodiment, the sealed booth 4 is provided with a holding means 8 for holding a container CT filled with a bacterial bed FB. This prevents the insertion part 21 from being subjected to impact when inserting the bacterial bed FB and the bacterial bed FB from accidentally shifting when being removed, ensuring reliable and smooth insertion and removal operations.

The holding means 8 has a holding part 81 that is, for example, attached to the outside or inside of the container CT and holds the fungal bed FB in a position directly below the insertion part 21. The holding part 81 is, for example, attached to the inner surface of the upper part of the fungal bed cultivation bag when it is open, and holds the cultivation bag in position while maintaining its shape. The holding part 81 of the holding means 8 is designed to move up and down in conjunction with, for example, the up and down movement of the entrance shutter 42 or exit shutter 43.

The control unit 6 is equipped with, for example, timing means such as a timer and various sensors, and is also connected to the temperature measurement means 7. It is a control means that controls the insertion processing means 2, drive device 3, sealed booth 4, conveying device 5, holding means 8, etc., according to conditions preset by a program or sequence.

Based on data from timers and sensors, the control unit 6 controls the intermittent pitch feeding operation of the conveying device 5 and the opening and closing operation of the entrance shutter 42 and exit shutter 43 of the sealed booth 4.

Based on data from sensors such as a timer and the temperature measuring means 7, the control unit 6 controls the drive device 3 to insert and remove the insertion unit 21 into the fungus bed, and controls the steam injection means to start and stop injection of steam.

Next, we will explain a method for sterilizing a bacterial bed using the bacterial bed treatment device 1 of this embodiment as the bacterial bed sterilization device 11.

First, before the mushroom bed treatment device 1, a mushroom bed molding machine fills a container CT, such as a mushroom bed cultivation bag, with prepared raw materials such as sawdust, and forms the mushroom bed FB into a block. The mushroom bed FB is placed on a conveying device 5 and automatically transported to the mushroom bed treatment device 1. During sterilization, the bag, which is the container CT filled with the mushroom bed FB, is treated with the top spread open.

In the bacterial bed processing device 1, the entrance shutter 42 is opened to accommodate the bacterial bed FB in the sealed booth 4, and the transport device 5 transports the bacterial bed FB, stopping it at a predetermined position corresponding to the insertion section 21. Once the bacterial bed FB is accommodated in the sealed booth 4, the entrance shutter 42 is closed. Furthermore, the upper part of the container CT filled with the bacterial bed FB is held at the predetermined position by the holding means 8.

The insertion part 21 is lowered via the drive device 3, and the nozzle part 21a at its lower end is inserted to a predetermined depth from above the bacterial bed FB. In this inserted state, heated steam is sprayed from the nozzle part 21a of the insertion part 21 via the steam spray mechanism 22 for approximately 30 to 40 seconds. This sterilizes the bacterial bed FB from the inside with heated steam. Note that the spray time of heated steam, i.e., the sterilization time, may be adjusted based on temperature data from the temperature measuring means 7.

The insertion part 21 is raised via the drive device 3, and the insertion part 21 is removed from the fungal bed FB.

The exit shutter 43 of the sealed booth 4 is opened, and the bacterial bed FB is transported out by the transport operation of the transport device 5. The entrance shutter 42 and exit shutter 43 are controlled to open and close simultaneously, and the transport device 5 synchronizes the transport of the sterilized bacterial bed FB and the transport of the untreated bacterial bed FB. By repeating this operation, the bacterial bed FB can be continuously sterilized.

Next, a second embodiment of the bacterial bed treatment apparatus 1 will be described with reference to Figure 3. The same components as those in the above embodiment are designated by the same reference numerals, and detailed descriptions will be omitted.

In this embodiment, an example is described in which the bacterial bed treatment device 1 is implemented as a bacterial bed cooling device 12 for cooling the bacterial bed after heat sterilization in the previous embodiment.

In this embodiment, as in the previous embodiment, the bacterial bed treatment apparatus 1 includes an insertion processing means 2 having an insertion section 21, a drive device 3, a sealed booth 4, a transport device 5, a holding means 8, and a temperature measurement means 7, as shown in FIG. 3.

In this embodiment, the insertion processing means 2 is configured for cooling. That is, the insertion processing means 2 is a cooling means that cools the bacterial bed FB from the inside via the insertion part 21, and includes the insertion part 21 and a cooling mechanism 23 that cools the insertion part 21.

In this embodiment, the insertion portion 21 is a rod-shaped body made of a metal with high thermal conductivity, such as copper. The lower end of the insertion portion 21 is tapered. By inserting the insertion portion 21 into the bacterial bed FB, the bacterial bed FB is cooled primarily by thermal conduction.

The insertion processing means 2 may be configured, for example, by providing a nozzle section for injecting gas into the insertion section 21, and by injecting cooling gas, the fungal bed may be cooled from the inside. In this case, a cooling gas injection mechanism may be provided instead of the steam injection mechanism of the above embodiment.

The cooling mechanism 23 can be a conventionally known cooling device such as a Peltier element, chiller, or heat pump. The insertion section 21 is cooled by the cooling mechanism 23.

Furthermore, in this embodiment, the cooling mechanism 23 cools the air within the storage space 41 of the sealed booth 4.

In this embodiment, the holding means 8 has, for example, a cooling member 82 that is applied to the outer surface of the bacterial bed FB. The cooling member 82 is also arranged to move up and down in synchronization with the holding part 81 that holds the upper opening side of the container. The cooling member 82 is cooled by the cooling mechanism 23.

The following describes the cooling process of a bacterial bed using the bacterial bed treatment device 1 of this embodiment. In this embodiment, too, the bag serving as the container CT filled with the bacterial bed FB is treated with the top open during the cooling process. Furthermore, the bacterial bed treatment device 1 serving as the bacterial bed cooling device 12 of this embodiment is installed, for example, behind the bacterial bed sterilizer 11 of the aforementioned embodiment, and cools the bacterial bed FB after it has been heat-sterilized.

In the bacterial bed processing apparatus 1, the entrance shutter 42 is opened to accommodate the bacterial bed FB in the sealed booth 4, and the transport device 5 moves the bacterial bed FB, bringing it to a predetermined position corresponding to the insertion section 21. Once the bacterial bed FB is accommodated in the sealed booth 4, the entrance shutter 42 is closed. Furthermore, the upper part of the container CT filled with the bacterial bed FB is held at the predetermined position by the holding means 8, and a cooling member 82 is applied to the outer surface of the container.

The insertion part 21 is lowered via the drive device 3, and its lower end is inserted to a predetermined depth from the top of the bacterial bed FB. This inserted state is maintained for approximately 30 to 40 seconds. This allows the bacterial bed FB to cool from the inside. The cooling time may also be adjusted based on temperature data from the temperature measuring means 7.

The insertion part 21 is raised via the drive device 3, and the insertion part 21 is removed from the fungal bed FB.

The exit shutter 43 of the sealed booth 4 is opened, and the bacterial bed FB is transported out by the transport operation of the transport device 5. The entrance shutter 42 and exit shutter 43 are controlled to open and close simultaneously, and the transport device 5 synchronizes the transport of the cooled bacterial bed FB and the transport of the untreated bacterial bed FB. By repeating this operation, the bacterial bed FB can be continuously cooled.

In other words, by providing a cooling process using the fungus bed cooling device 12 after the sterilization process using heated steam using the fungus bed sterilization device 11 of the above embodiment, the overall sterilization process can be significantly shortened, and the subsequent process of inoculating the fungus bed with mushroom spawn can be carried out smoothly.

Next, the bacterial bed sterilization system 10 of the present invention will be described with reference to Figure 4. The same components as those in the above embodiment are designated by the same reference numerals, and detailed descriptions will be omitted.

The bacterial bed sterilization system 10 of this embodiment includes a first bacterial bed treatment device 1 serving as the bacterial bed sterilizer 11 described above, a second bacterial bed treatment device 1 serving as the bacterial bed cooling device 12 described above, and a conveying device 5.

For the sake of explanation, in the bacterial bed sterilization system 10 of this embodiment, the elements of the bacterial bed sterilization device 11 are referred to as a first insertion unit 21, a first insertion processing means 2, a first drive unit 3, etc.

To distinguish the elements of the bacterial bed cooling device 12 from the elements of the bacterial bed sterilization device 11, they will be referred to as the second insertion unit 21, the second insertion processing means 2, the second drive unit 3, etc.

In this embodiment, a preliminary cooling booth 45 is provided between the bacterial bed sterilizer 11 and the bacterial bed cooling device 12. The preliminary cooling booth 45 can cool the high-temperature bacterial bed FB that has been heat-sterilized to some extent in a room-temperature space before the bacterial bed cooling device 12.

The entrance to the preliminary cooling booth is the exit shutter 43 of the bacterial bed sterilizer 11, and the exit is the entrance shutter 42 of the bacterial bed cooling device 12.The booth opens and closes in conjunction with these shutters to load and unload the bacterial bed FB.

In addition, the outlet shutter of the sealed booth of the bacterial bed sterilizer 11 and the inlet shutter of the sealed booth of the bacterial bed cooling device 12 may be shared, and the sealed booths may be directly connected to each other.

The conveying device 5 conveys the bacterial bed FB to the bacterial bed sterilizer 11, the preliminary cooling booth 45, and the bacterial bed cooling device 12 in that order.

In this way, by installing the bacterial bed sterilizer 11 and bacterial bed cooling device 12 side by side and continuously transporting the bacterial bed FB using the transport device 5, the heat sterilization process and cooling process can be carried out consecutively. As a result, the labor required by the workers can be significantly reduced and the bacterial bed can be sterilized highly efficiently in an extremely short time.

In addition, a fungal bed forming machine FE is installed upstream in the conveying direction (D) of the conveying device 5 of the fungal bed sterilization system 10. This machine fills raw materials such as prepared sawdust BS into a container CT such as a fungal bed cultivation bag and forms the fungal bed FB into a block shape.

Meanwhile, downstream of the conveying device 5 of the mushroom bed sterilization system 10 in the conveying direction (D), an inoculation machine DE is installed, which inoculates mushroom spawn SD onto the mushroom bed FB conveyed from the mushroom bed cooling device 12.

By transporting in one direction D using a single transport device 5, molding, bacterial bed sterilization and cooling, and seed inoculation can be performed consecutively. The molding machine FE, bacterial bed sterilization system 10, and inoculation machine DE can be installed, for example, in a clean room, so that the above operations can be performed in a clean environment.

The mushroom bed treatment device, mushroom bed sterilization system, and mushroom bed sterilization method of the present invention can be effectively used to sterilize mushroom beds used for artificial cultivation.

REFERENCE SIGNS LIST 1 Bacteria bed processing device 10 Bacteria bed sterilization system 11 Bacteria bed sterilization device 12 Bacteria bed cooling device 2 Insertion processing means 21 Insertion section 21a Nozzle section 22 Steam injection mechanism 23 Cooling mechanism 3 Driving device 4 Sealed booth 41 Storage space 5 Conveying device 7 Temperature measuring means 8 Holding means 82 Cooling plate FB Bacteria bed CT Container

Claims (10)

An insertion processing means having an insertion part to be inserted into the bacterial bed filled in the container, and heating or cooling the bacterial bed from the inside through the insertion part;
A drive device that moves the fungus bed and the insertion part relatively to insert and remove the insertion part into and from the fungus bed ,
A bacterial bed treatment device , characterized in that the insertion treatment means has a cooling mechanism for cooling the insertion part . The bacterial bed treatment device according to claim 1, characterized in that the insertion treatment means has a steam injection mechanism that injects heated steam into the bacterial bed while the insertion part is inserted into the bacterial bed. The bacteria bed treatment device according to claim 2, characterized in that the insertion section has a nozzle section that passes heated steam through the interior and sprays steam from multiple steam spray holes. The insertion portion is formed of a rod-shaped body,
4. The bacteria bed treatment apparatus according to claim 1, wherein the drive device has a linear motion mechanism that moves the insertion part linearly along the longitudinal direction of the insertion part. Further provided is a sealed booth in which a sealed storage space for storing the fungal bed is formed,
4. The bacteria bed treatment apparatus according to claim 1, wherein the insertion section is installed inside the sealed booth. 6. The bacterial bed treatment apparatus according to claim 5 , further comprising a bacterial bed holding means inside the sealed booth for holding the bacterial bed at a position corresponding to the insertion portion. 7. The bacterial bed treatment apparatus according to claim 6 , wherein the bacterial bed holding means has a cooling member applied to the outer surface of the bacterial bed. A bacterial bed treatment device according to any one of claims 1 to 3, characterized in that the insertion section is provided with a temperature measuring means for measuring the temperature of the bacterial bed. A bacterial bed sterilization device having an insertion part that is inserted into and removed from a bacterial bed filled in a container via a drive device, and equipped with an insertion processing means that heat-sterilizes the bacterial bed from the inside via the insertion part;
A bacterial bed cooling device having a second insertion part that is inserted into and removed from the bacterial bed via a second drive device , and a second insertion processing means that cools the bacterial bed from the inside via the second insertion part cooled by a cooling mechanism ;
A bacterial bed sterilization system comprising: a transport device that transports the bacterial bed from the bacterial bed sterilization device to the bacterial bed cooling device. Inserting an insertion portion of an insertion processing means equipped with a steam injection mechanism for injecting heated steam into the bacterial bed filled in the container;
a steam sterilization step of sterilizing the bacterial bed by injecting heated steam into the bacterial bed through the insertion part for a predetermined time ,
A bacterial bed sterilization method characterized by further comprising a cooling step of cooling the bacterial bed by inserting a second insertion part cooled by a cooling means into the bacterial bed for a predetermined time after the steam sterilization step .