JP2021104493A - Screening method of materials suitable for fermentation and screening system of materials suitable for fermentation - Google Patents

Abstract

To provide a screening method of materials suitable for fermentation, capable of good screening of materials suitable for fermentation such as light-weight paper wastes, etc., from general wastes which are articles to be processed.SOLUTION: A screening method of materials suitable for fermentation includes; a first breaking and screening step of breaking articles to be processed and screening materials suitable for fermentation from broken articles to be processed; a humidification step of humidifying residues of screening of materials suitable for fermentation in the first breaking screening step; and a screening step of screening of materials suitable for fermentation from the residues humidified in the humidification step.SELECTED DRAWING: Figure 2

Description

The present invention relates to a method for selecting a suitable fermentation product and a system for selecting a suitable fermentation product from the material to be treated.

As described in Patent Document 1, in order to realize a resource recycling society, biogas (about 60%) that can use organic solid waste such as food waste and paper waste as an energy source by anaerobic microorganisms. Practical application of methane fermentation treatment to convert to methane gas, about 40% carbon dioxide gas, a small amount of hydrogen sulfide, etc. is underway.

Organic solid waste such as food waste and paper waste, which are suitable for fermentation, from general waste discarded from ordinary households and business waste (hereinafter referred to as "waste") discarded from restaurants and the like. Various crushing and sorting devices are used to sort and supply the waste to the methane fermentation device.

Patent Document 2 describes, as a kitchen waste separator, a tubular crushing chamber in which a crushing object introduced with the rotation of a crushing impeller is crushed while being sent out in the axial direction of the crushing impeller. A sieve surface that defines the lower inner peripheral surface of the crushing chamber in order to shake off the crushed material crushed in the crushing chamber, and an end in the delivery direction of the crushed object in the crushing chamber without being sieved from the sieve surface. A crushing and sorting machine provided with a residue discharge port formed on an upper inner peripheral surface portion of an end portion of the crushing chamber is disclosed in order to discharge the residue reaching the portion to the outside.

Japanese Unexamined Patent Publication No. 2012-86157 Japanese Unexamined Patent Publication No. 2012-101202

When a uniaxial crusher is used as a crushing and sorting device, hard resin, which is unsuitable for fermentation, is crushed at the same time, and when the crushed object to be processed is wind-sorted, the hard resin piece crushed to the kitchen waste side, which is a heavy substance. On the other hand, paper waste, which is suitable for fermentation, is mixed on the side of lightweight materials such as vinyl chloride resin pieces for packaging, which is unsuitable for fermentation, and cannot be sorted well.

Further, in the crushing and sorting machine as disclosed in Patent Document 2, paper waste cannot be crushed well by the impeller for crushing, and the paper waste is not sieved from the sieving surface as a suitable fermentation product and is mixed in the unsuitable fermentation side. Therefore, it cannot be sorted well.

An object of the present invention is to provide a fermentation suitable material sorting method and a fermentation suitable material sorting system capable of satisfactorily sorting fermentation suitable materials such as lightweight paper waste from waste which is a waste to be treated, in view of the above-mentioned prior art. At the point.

In order to achieve the above-mentioned object, the first characteristic configuration of the fermentation suitable material selection method according to the present invention is a fermentation suitable material selection method for selecting a fermentation suitable material containing paper from waste which is a waste to be treated. The first crushing and sorting step of crushing the object to be processed and sorting and processing the suitable fermentation substance from the crushed object to be processed, the humidifying step of humidifying the residue from which the suitable fermentation substance was selected in the first crushing and sorting step, and the above. The point is that it includes a sorting step of sorting suitable fermentation products from the residue moistened in the humidifying step.

Waste is crushed in the crushing and sorting process, and fermentation-appropriate products are sorted from the crushed products to be processed. For example, papers that are relatively lighter than kitchen debris, which is suitable for fermentation, are not sufficiently crushed and are not sorted as suitable for fermentation in the crushing and sorting step, and are contained on the residue side, which is unsuitable for fermentation. However, the papers contained in the residue humidified in the humidification step absorb moisture and increase in weight, so that the papers can be appropriately selected and processed as suitable for fermentation, and the recovery rate of suitable for fermentation is improved. In the humidification process, the degree of moisture absorption of the paper can be adjusted to the extent that it can be appropriately sorted, so that the water content of the fermentation-appropriate material selected in the sorting process can be kept low, and it becomes excessive in the subsequent methane fermentation treatment. The fermentation process can be performed efficiently without increasing the amount of liquid.

The second feature configuration is that, in addition to the first feature configuration described above, the sorting step is a second crushing sorting step performed together with crushing.

Paper contained in the residue humidified in the humidification process absorbs moisture, increases its weight, and is susceptible to the impact force from the blade. The recovery rate is improved. In the humidification process, the degree of moisture absorption of the paper can be adjusted to the extent that it can be easily crushed, so that the water content of the fermentation-appropriate material selected in the sorting process can be kept low, and the liquid is excessively liquid in the subsequent methane fermentation treatment. Fermentation processing can be performed efficiently without increasing the amount.

In the third characteristic configuration, in addition to the above-mentioned second characteristic configuration, in the second crushing and sorting step, the residue humidified in the humidifying step is circulated and transported to the first crushing and sorting step, and the first crushing and sorting step is performed. The point is that it is executed in the sorting process.

Since the residue discharged in the first crushing and sorting step can be crushed and sorted by circulating and transporting it to the first crushing and sorting step again, the equipment cost for executing each crushing and sorting step can be reduced. Further, as the number of times of circulation and transportation is increased, the accuracy of sorting suitable fermentation products is increased, and the target recovery rate can be obtained by adjusting the number of times.

The fourth characteristic configuration is, in addition to any of the above-mentioned first to third characteristic configurations, the humidification step is a step of spraying water on the residue, and the first crushing and sorting step produces a suitable fermentation product. The point is that it includes a spray amount adjusting process for adjusting the spray amount based on the state of contamination of suitable fermentation substances contained in the residue after sorting.

Since the amount of spray is adjusted according to the state of contamination of the suitable fermentation product contained in the residue, it is possible to suppress an increase in the water content of the suitable fermentation product due to excessive humidification and adjust the target recovery rate.

The fifth characteristic configuration is a method for selecting suitable fermentation products from waste products to be treated, which includes a humidification step of humidifying the material to be treated and a product to be treated that has been humidified in the humidification step. The humidification step is a step of spraying water on the object to be treated, and is provided with a crushing and sorting step of crushing the material and selecting a suitable material for fermentation from the crushed material to be processed. The point is that the spray amount adjusting process for adjusting the spray amount based on the mixing state of the above is included.

By humidifying the object to be treated before the crushing and sorting step, the papers can be appropriately sorted to the fermentation suitable side at the stage of the crushing and sorting step.

The sixth characteristic configuration is that, in addition to the fifth characteristic configuration described above, the residue after the fermentation suitable material is selected in the crushing and sorting step is circulated and supplied to the humidifying step or the crushing and sorting step. ..

The recovery rate of suitable fermentation products is improved.

The first characteristic configuration of the fermentation-suitable material sorting system according to the present invention is a fermentation-suitable material sorting system that sorts fermentation-suitable materials including paper from wastes to be treated, and is a crushed portion for crushing the fermented product. A first crushing and sorting device provided with a sorting unit for sorting and processing suitable fermentation products from the crushed material to be processed, and a humidifying device for humidifying the residue after the suitable fermentation products are sorted by the first crushing and sorting device. And a sorting device provided with a sorting unit for sorting and processing suitable fermentation products from the residue humidified by the humidifying device.

In the second feature configuration, in addition to the first feature configuration described above, the sorting device includes a crushing unit for crushing the residue humidified by the humidifying device, and the sorting unit crushes the residue crushed by the crushing unit. The point is that it is composed of a second crushing and sorting device that sorts by.

The third characteristic configuration is that, in addition to the above-mentioned second characteristic configuration, the first crushing and sorting device and the second crushing and sorting device are integrally arranged vertically with the humidifying device in between.

The sorting device can be made compact.

In the fourth feature configuration, in addition to the second or third feature configuration described above, the first crushing and sorting device and the second crushing and sorting device are used in combination, and the residue humidified by the humidifying device is used as the first. The point is that it is equipped with a transport mechanism that circulates and transports the crushing and sorting device.

In the fifth characteristic configuration, in addition to any of the above-mentioned first to fourth characteristic configurations, the humidifying device has a spray nozzle for spraying water on the residue, and the first crushing and sorting device has a fermentation suitable product. The point is that it includes a spray amount adjusting mechanism that adjusts the spray amount based on the state of contamination of the fermentation-suitable substance contained in the selected residue.

In the sixth feature configuration, in addition to the fifth feature configuration described above, the spray amount adjusting mechanism has an input unit for inputting a captured image of the residue and a spray of water based on the captured image input to the input unit. The point is that it is composed of a machine learning device including a calculation unit for calculating the amount and an output unit for outputting the spray amount of water calculated by the calculation unit.

As described above, according to the present invention, it is possible to provide a fermentation suitable material sorting method and a fermentation suitable material sorting system capable of satisfactorily sorting fermentation suitable materials such as lightweight paper waste from waste as a object to be treated. I can now do it.

(A) is a cross-sectional view of a main part of a crushing and sorting apparatus suitable for the fermentation suitable material sorting method according to the present invention, and (b) is a side view of a crushing impeller. Explanatory drawing of fermentation suitable material selection method by this invention Explanatory drawing which shows other mode of fermentation suitable material selection method by this invention Explanatory drawing which shows other mode of fermentation suitable material selection method by this invention Explanatory drawing which shows other mode of fermentation suitable material selection method by this invention

Hereinafter, a fermentation suitable product sorting method and a fermentation suitable product sorting system according to the present invention will be described with reference to the drawings.
[Explanation of crushing and sorting equipment]
FIG. 1A shows a crushing and sorting device 1 used in a method for sorting suitable fermentation products. The crushing and sorting device 1 has a cylindrical drum 2 arranged on a pedestal so that the axis P is in a horizontal posture, and a rotation housed inside the drum 2 and arranged along the axis P of the drum 2. A crushing impeller 4 having a plurality of crushing blades 5 attached to the shaft 3 in a comb shape, an input hopper 6 opened above one end side of the drum 2, and a discharge port opened on the other end side of the drum 2. 7 is provided. A motor for rotating and driving the crushing impeller 4 is arranged on the side of the drum 2.

A pair of screw conveyors 8 arranged in parallel along the bottom of the charging hopper 6 are provided. For example, when the waste conveyed by the belt type conveyor mechanism is dropped and supplied to the charging hopper 6 from above, it is supplied to the crushing and sorting space in the drum 2 by the screw conveyor 8. A motor for rotationally driving the screw conveyor 8 is arranged on the side wall of the charging hopper 6.

A sieve mechanism 2A made of punching metal having a diameter of, for example, about 30, 50, 75 mm and having a plurality of openings formed is configured in a region of the outer circumference of the drum 2 below the shaft core P.

As shown in FIG. 1B, in the crushing impeller 4, the crushing blades 5 are attached to the rotating shaft 3 via the attachments 3A and 3B so that the crushing blades 5 are located in a cross shape in the axial direction of the axis. It is oscillatingly attached via the oscillating shaft 5A. This is to avoid damage due to the crushing blade 5 swinging when a hard member such as metal is mixed in the object to be processed. The swing of the crushing blade 5 is not essential.

The waste supplied to the crushing and sorting space includes organic waste such as kitchen waste, which is suitable for fermentation, and organic waste such as paper, as well as glass, resin, ceramic pieces, and metal pieces, which are unsuitable for fermentation. Various wastes such as are mixed.

In the process of such waste colliding with a plurality of crushing blades 5 and being transported to the discharge port 7 side along the axis while being shear crushed or impact crushed, a suitable fermentation product is delivered from the opening of the sieving mechanism 2A. It falls and is collected by a conveyor mechanism installed below the sieving mechanism 2A and supplied to the methane fermentation apparatus.

On the other hand, the ruptured sheet-shaped resin, metal, or other unsuitable material for fermentation is transported to the downstream side without being easily broken even if it collides with the crushing blade 5, and is discharged to the most downstream side of the rotating shaft 3. It is scraped up by the blade 9 and discharged from the discharge port 7.

Paper, which is suitable for fermentation, is very light like sheet-shaped resin and receives the impact force from the blade. Therefore, it is not easily broken even if it collides with the crushing blade 5, and it is discharged together with the unsuitable material for fermentation. The rate of discharge from 7 tends to be high.

Even if sorting using a wind power sorting mechanism is adopted instead of sorting by the sieving mechanism 2A, paper is lighter than suitable fermentation products such as kitchen waste, like sheet-shaped resin, so it is suitable for fermentation. There is a high tendency to be sorted.

Therefore, it is very difficult to sort and collect the papers mixed in the waste as suitable for fermentation. The fermentation suitable material sorting method and the fermentation suitable material sorting system of the present invention make it possible to efficiently sort and collect such papers as fermentation suitable products.

[Explanation of fermentation suitable material selection method]
As shown in FIG. 2, the method for selecting suitable fermentation products is a method for appropriately selecting suitable fermentation products including paper from the waste to be treated, and breaks the waste filled in the resin bag. First crushing, which is put into the machine 10 to crush the bag, put the crushed object to be processed into the crushing and sorting machine 1, shear crushing or impact crushing, and sort out suitable fermentation products from the crushed object to be processed. A sorting step, a humidification step of humidifying the residue selected for fermentation suitable material in the first crushing sorting step, and a shear crushing or impact crushing of the residue humidified in the humidifying step, and sorting and processing the fermentation suitable material from the crushed residue. Includes a second crushing and sorting step.

In the first crushing and sorting step, the waste is shear crushed or impact crushed, and a suitable fermentation product is sorted from the crushed material to be processed. Papers, which are relatively lighter than kitchen dregs, are not sufficiently crushed and are not sorted as suitable for fermentation in the first crushing and sorting step, and are contained on the residue side, which is unsuitable for fermentation.

However, the paper contained in the residue humidified in the humidification step absorbs moisture, increases its weight, and is susceptible to impact force. Therefore, it is easily crushed in the second crushing and sorting step, and is suitable as a suitable fermentation product. Will be sorted.

In the humidification step, the degree of moisture absorption of the paper can be adjusted to such that crushing can be easily performed, so that the water content of the fermentation suitable material selected in the second crushing sorting step can be suppressed to a low level, and thus the subsequent methane fermentation treatment. The fermentation process can be performed efficiently without causing an excessive increase in the amount of liquid.

It is preferable to have an inspection step for inspecting whether or not the residue discharged in the first crushing and sorting step contains suitable fermentation substances, and when the amount of suitable fermentation substances contained in the residue is very small. , It is transported to the unsuitable material processing device as it is. The inspection process can be visually judged by the operator either directly or based on the image taken by the imaging device. Further, the photographed image may be image-processed to automatically determine the degree of content of a suitable fermentation product. In particular, it is preferable to automatically determine how much paper is contained as a suitable fermentation product.

The humidification step is a step of spraying water on the residue through a spray nozzle, and the amount of spray is adjusted based on the state of contamination of the suitable fermentation substance contained in the residue after the suitable fermentation substance is selected in the first crushing and sorting step. It is preferable to include a spray amount adjusting treatment. The amount of spray from the spray nozzle is appropriately adjusted in the humidification step based on the content of the paper.

For example, a machine learning device is provided with a machine learning device that separates an image in which miscellaneous residues are taken based on the color and shape, and determines the amount of paper based on the shape and color of each separated area. If it is determined that the content of paper is equal to or higher than the predetermined threshold, the process shifts to the humidification step, and if it is determined that the content of paper is less than the predetermined threshold, it may be transported to an unsuitable material processing apparatus. preferable.

A spray amount adjusting mechanism can be configured by such a machine learning device. For example, the spray amount adjusting mechanism includes an input unit for inputting a captured image of the residue, a calculation unit for calculating the spray amount of water based on the captured image input to the input unit, and a water spray amount calculated by the calculation unit. It can be configured by a machine learning device provided with an output unit for outputting.

Specifically, the machine learning device can be configured with a neural network or the like, and the image in which miscellaneous residues in the preprocessing section are captured is separated into regions based on the color and shape, and paper is used based on the shape and color of each region. It can be configured by a neural network that determines and outputs how much is contained and also outputs the amount of spray.

FIG. 3 shows another aspect of the method for selecting suitable fermentation products. The second crushing and sorting step is configured so that the residue humidified in the humidifying step is circulated and transported to the first crushing and sorting step and executed in the first crushing and sorting step. That is, the waste is circulated and supplied to the first crushing and sorting step. In this embodiment, the crushing and sorting step is not continuously executed, but a certain amount of waste is batch-processed in the first crushing and sorting step, and then the residue is circulated to the first crushing and sorting step again for batch processing. Will be done. Although one circulation is sufficient, it is possible to circulate a plurality of times based on the result of the inspection process.

Since the second crushing step can be executed by circulating and transporting the residue discharged in the first crushing and sorting step to the first crushing and sorting step, the equipment cost for executing each crushing and sorting step can be reduced. In addition, the more the number of times of circulation and transportation is increased, the higher the accuracy of sorting suitable fermentation products.

FIG. 4 shows a crushing and sorting apparatus suitable for carrying out the fermentation suitable material sorting method shown in FIG. The cylindrical drum of the above-mentioned crushing and sorting device 1 is extended long in the axial direction, and a first crushing and sorting region where the first crushing and sorting step is executed is provided on the upstream side near the charging hopper, and the discharge section is provided with a first crushing and sorting region. A second crushing and sorting area is provided on the near downstream side where the second crushing and sorting step is executed. A spray mechanism is provided between the first crushing and sorting region and the second crushing and sorting region.

FIG. 5 shows another aspect of the method for selecting suitable fermentation products.
The method for selecting suitable fermentable substances includes a humidifying step of humidifying the object to be treated, and a crushing and sorting step of crushing the object to be humidified in the humidifying step and sorting and processing suitable substances for fermentation from the crushed object to be processed. The humidification step is a step of spraying water on the object to be treated, and includes a spray amount adjusting process for adjusting the amount of spray based on the state of mixing of suitable fermentation substances contained in the object to be treated. It is preferable to circulate and supply the residue after the fermentation suitable material is selected in the crushing and sorting step to the humidification step, and the recovery rate of the fermentation suitable product is improved.

By humidifying the object to be treated before the crushing and sorting step, the papers can be appropriately sorted to the fermentation suitable side at the stage of the crushing and sorting step. The state of contamination of the fermentation-suitable substance can be measured at the beginning of the object to be treated or the residue after sorting, and the humidification amount can be adjusted based on the result.

In the above-mentioned example, the first and second crushing and sorting steps have described an example in which the crushing and sorting device 1 adopting the sieving sorting method is used, but the fermentation performed in the first crushing and sorting step and / or the second crushing and sorting step. As for the sorting process of suitable products, either a sieving method or a wind force sorting method may be adopted.

Even if the paper is not sufficiently crushed in the first crushing and sorting step and is not sorted to the fermentation suitable side by the sieving sorting method or the wind sorting method, the weight increases by the humidification step, and the weight difference in the sorting step. A heavy material such as paper that has been humidified using the above is used as a suitable material for fermentation, and a resin piece or the like is sorted and collected as a suitable material for fermentation by a wind power sorting method. Further, since crushing is not performed in the sorting process, a crushing mechanism is not required and the device configuration is simplified. As a method for sorting heavy objects such as humidified paper using the difference in weight, weight sorting using the difference in weight such as sorting by vibration may be adopted in addition to wind power sorting.

[Explanation of fermentation suitable selection system]
As described with reference to FIGS. 1 and 2, the fermentation suitability sorting system for sorting the fermentation suitability including paper from the waste to be treated has a crushed portion for crushing the object to be treated and a crushed object to be treated. A first crushing and sorting device provided with a sorting unit for sorting and processing suitable fermentation products from the ground, a humidifying device for humidifying the residue after the suitable fermentation products have been sorted by the first crushing and sorting device, and a residue humidified by the humidifying device. It is configured to include a second crushing and sorting apparatus including a crushing section for crushing the crushed residue and a sorting section for sorting and processing suitable fermentation products from the crushed residue.

As described with reference to FIG. 3, it is preferable that the first crushing and sorting device and the second crushing and sorting device are used in combination, and a transport mechanism for circulating and transporting the residue humidified by the humidifying device to the first crushing and sorting device is provided. When the food waste is contained in the object to be treated, the water content of the food waste contributes to the weight of the residue, so that the recovery rate of the suitable fermentation product is improved even if the spray amount is suppressed.

As described with reference to FIG. 4, it is preferable that the first crushing and sorting device and the second crushing and sorting device are integrally arranged vertically with the humidifying device in between.

The humidifying device includes a spray nozzle that sprays water on the residue, a spray amount adjustment mechanism that adjusts the spray amount based on the state of contamination of the fermentation-suitable material contained in the residue from which the fermentation-suitable material has been sorted by the first crushing and sorting device. It is preferable that the structure is provided with.

The spray amount adjustment mechanism has an input unit for inputting a captured image of the residue, a calculation unit for calculating the spray amount of water based on the captured image input to the input unit, and a water spray amount calculated by the calculation unit. It is preferably composed of a machine learning device including an output unit for output.

In the above-described embodiment, an example in which the residue is crushed and sorted in the second crushing and sorting step has been described, but the crushing step is not essential and only the sorting step may be executed. That is, the method for selecting suitable fermentation products according to the present invention is a method for selecting suitable fermentation products including paper from waste products to be treated, crushing the material to be treated, and selecting suitable fermentation products from the crushed products to be processed. A crushing and sorting step for sorting, a humidifying step for humidifying the residue selected for fermentation in the crushing and sorting step, and a sorting step for crushing the residue humidified in the humidification step and sorting and processing the suitable fermentation substance from the crushed residue. And, it is sufficient that the sorting step includes or does not include the crushing step. Further, in the fermentation suitable material sorting system according to the present invention, it is also possible to use a sorting device having only a sorting section without a crushing section instead of the second crushing sorting device.

The above-described embodiment is an aspect of the present invention, and the description does not limit the present invention, and the specific configuration of each part can be appropriately modified and designed within the range in which the effects of the present invention are exhibited. Needless to say.

1: Crushing and sorting device 2: Drum 2A: Sieve mechanism 3: Rotating shaft 4: Crushing impeller 5: Crushing blade 6: Input hopper 7: Discharge port 8: Screw conveyor P: Shaft core

Claims (12)

It is a fermentation suitable material selection method for selecting a fermentation suitable material including paper from waste which is a waste to be treated.
The first crushing and sorting step of crushing the object to be processed and sorting the crushed object suitable for fermentation from the crushed object.
A humidification step of humidifying the residue from which fermentation suitable substances have been selected in the first crushing and sorting step,
A sorting step of sorting suitable fermentation products from the residue humidified in the humidifying step, and a sorting step.
Fermentation suitable selection method including. The method for selecting suitable fermentation products according to claim 1, wherein the sorting step is a second crushing sorting step performed together with crushing. The fermentation suitable material sorting method according to claim 2, wherein in the second crushing and sorting step, the residue humidified in the humidifying step is circulated and transported to the first crushing and sorting step, and is executed in the first crushing and sorting step. The humidification step is a step of spraying water on the residue, and the amount of spray is adjusted based on the state of mixing of the suitable fermentation substance contained in the residue after the suitable fermentation substance is selected in the first crushing and sorting step. The method for selecting suitable fermentation products according to any one of claims 1 to 3, which comprises an adjustment process. It is a fermentation suitable material selection method that selects a fermentation suitable material from the waste that is the object to be treated.
Humidification process to humidify the object to be treated and
A crushing and sorting step of crushing the material to be humidified in the humidification step and sorting a suitable fermentation material from the crushed material to be treated.
With
The humidification step is a step of spraying water on the object to be treated, and is a method for selecting suitable fermentation substances, which comprises a spray amount adjusting process for adjusting the amount of spray based on the state of mixing of suitable fermentation substances contained in the object to be treated. The method for selecting a suitable fermentation substance according to claim 5, wherein the residue after the suitable fermentation substance is selected in the crushing and sorting step is circulated and supplied to the humidifying step or the crushing and sorting step. It is a fermentation suitability selection system that sorts fermentation suitability including paper from waste that is the object to be treated.
A first crushing and sorting apparatus including a crushing unit for crushing an object to be processed and a sorting unit for selecting and processing suitable fermentation products from the crushed object to be processed.
A humidifying device that humidifies the residue after the fermentation suitable material is sorted by the first crushing and sorting device, and a humidifying device.
A sorting device provided with a sorting unit for sorting suitable fermentation substances from the residue humidified by the humidifying device, and a sorting device.
Fermentation suitable selection system including. The fermentation according to claim 7, wherein the sorting device includes a crushing unit that crushes the residue humidified by the humidifying device, and is composed of a second crushing and sorting device that sorts the residue crushed by the crushing unit by the sorting unit. Suitable material sorting system. The fermentation suitable material sorting system according to claim 8, wherein the first crushing and sorting device and the second crushing and sorting device are integrally arranged vertically with the humidifying device in between. The fermentation suitability according to claim 8 or 9, wherein the first crushing and sorting device and the second crushing and sorting device are used in combination, and a transport mechanism for circulating and transporting the residue humidified by the humidifying device to the first crushing and sorting device is provided. Item sorting system. The humidifying device includes a spray nozzle that sprays water onto the residue, and a spray amount adjusting mechanism that adjusts the spray amount based on the state of mixing of the fermentation-suitable substance contained in the residue from which the fermentation-suitable substance has been sorted by the first crushing and sorting device. The fermentation suitable product sorting system according to any one of claims 7 to 10, further comprising. The spray amount adjusting mechanism includes an input unit for inputting a captured image of the residue, a calculation unit for calculating the spray amount of water based on the captured image input to the input unit, and a water spray amount calculated by the calculation unit. The fermentation suitability sorting system according to claim 11, which comprises a machine learning device including an output unit for outputting the above.

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