JP6836813B2 - Combustible waste disposal system - Google Patents

Description

The present invention relates to a combustible waste treatment system for treating kitchen waste, disposable diapers, etc. as combustible waste containing a large amount of water.

In recent years, in order to reduce the burden on the environment, a recycling-oriented society has been advocated in which consumption of natural resources is suppressed, waste is minimized, and recyclable materials are reused. With the transition to a recycling-oriented society, the separate collection of waste from ordinary households, hospitals, facilities, etc. is progressing, and the amount of waste discharged is decreasing year by year. The amount of waste discharged was 44.32 million tons nationwide in 2014, but it increased to 43.98 million tons nationwide in 2015, a decrease of 0.8%. Combustible waste from ordinary households, hospitals, facilities, etc. is incinerated at a waste incineration facility. There are 1,141 waste incineration facilities nationwide, and the overall waste disposal capacity is 181,891 tons / day.

The combustible waste incinerated at the waste incineration facility includes kitchen waste (kitchens) and disposable diapers. Of the combustible waste, about 46% of kitchen waste (kitchens) (Chiba City 2016 data) and about 4.4% of disposable diapers (Nakano Ward 2009 household waste composition analysis survey) are included. Approximately 80% of kitchen waste is water, and paper diapers also contain a large amount of water because the polymer absorber absorbs urine. Moreover, disposable diapers are collected from ordinary households and facilities and accumulated in garbage pits, etc., and contain 20 to 40 times more water than the amount of water already absorbed from food waste and rainwater. Since it is absorbed by the absorber, the weight increases when it is put into the incinerator in the waste incineration facility.

In this way, when combustible waste containing a large amount of water and combustible waste including paper diapers is incinerated in an incinerator, the incineration temperature of the incinerator is lowered by the contained water. It requires a large amount of fuel because it needs to maintain the temperature. In addition, a disposable diaper that absorbs moisture and has an increased weight increases the bulk as a whole and increases the amount of waste, so a large incinerator is required.

Therefore, Patent Document 1 proposes a waste treatment method and treatment equipment capable of operating a treatment equipment (incinerator or the like) stably and efficiently even if wastes having different water contents are brought in. In Patent Document 1, waste having a high water content is collected in a first collection point, dried once, and then thermally decomposed, and waste having a low water content is collected in a second collection point and directly pyrolyzed. Then, waste having a high water content and waste having a low water content are thermally decomposed, crushed, burned in a melting furnace, and incombustibles are taken out as molten slag. Therefore, in Patent Document 1, even if wastes having different water contents are brought in, the treatment equipment can be operated stably and efficiently.

Japanese Unexamined Patent Publication No. 2003-42420

However, in the waste treatment method and treatment equipment in Patent Document 1, the waste having a high water content and the waste having a low water content are separated, and the waste having a high water content is simply dried to remove the water. Since both waste with a high water content and waste with a low water content are finally burned and processed in a melting furnace, an incinerator (melting furnace) is required as a waste treatment facility.

Further, in the waste treatment method and treatment equipment in Patent Document 1, both the waste having a high water content and the waste having a low water content are finally incinerated, and the waste is not reused. For this reason, the reusable resources contained in the waste are wasted, which is one of the factors that hinder the construction of a recycling-oriented society that has been advocated in recent years.

Therefore, an object of the present invention is to provide a combustible waste treatment system that does not require an incinerator in the treatment of combustible waste containing a large amount of water and can be reused without incinerating the combustible waste.

In order to solve the above-mentioned problems and achieve the object, the first aspect of the present invention is a combustible waste treatment system for treating kitchen waste containing water, and the combustible waste treatment system is sewer sewage. The combustible waste treatment system is installed in a sewage treatment plant that purifies and discharges the waste water as recycled water. A step of taking out the kitchen waste from the inside of the sewage bag, a disinfection step of disinfecting the separately collected kitchen waste using a treatment liquid containing recycled water treated at the sewerage treatment plant, and a disinfection step of disinfecting the kitchen waste. A treatment liquid after disinfecting the kitchen waste, which comprises a drying step of dehydrating and drying the kitchen waste and a reuse step of reusing the material constituting the kitchen waste dehydrated and dried in the drying step. Is treated with water so that it can be disposed of and discharged to the sewage treatment plant.

A second aspect of the present invention is characterized in that the step of taking out the kitchen waste (9) from the bag is the bag breaking / crushing step (12a).

A third aspect of the present invention is characterized in that, in the disinfection step, the food waste is disinfected by decomposing each material constituting the food waste using the treatment liquid.

In a fourth aspect of the present invention, the kitchen waste is stirred together with a treatment liquid consisting of the regenerated water and a disinfectant / sterilizing agent in the disinfection step, the kitchen waste is dried in the drying step, and the drying is performed in the reuse step. It is characterized in that the kitchen waste dried in the process is reused as a raw material for solid fuel and used as a raw material for biomass fuel.

According to the present invention, the kitchen waste containing a large amount of water is disinfected in the disinfection step, dehydrated and dried in the drying step, and then the material constituting the kitchen waste is reused. In, the kitchen waste can be reused without the need for an incinerator and without incinerating the kitchen waste.

Therefore, according to the present invention, it is possible to reduce the amount of waste incinerated and the amount of waste incineration facilities, and if it is possible to reduce the amount of waste incineration facilities, the construction cost of expensive waste incineration facilities and the maintenance cost of waste incineration facilities will also be reduced. It becomes possible.

Further, according to the present invention, the kitchen waste can be treated hygienically, the amount of the food waste can be reduced, and the recycling-oriented society can be constructed by reusing the food waste.

FIG. 1 is a process chart showing a system for treating used disposable diapers as combustible waste using the combustible waste treatment system according to the present invention. FIG. 2 is a process chart showing a system for treating kitchen waste as combustible waste using the combustible waste treatment system according to the present invention. FIG. 3 is a process diagram showing a system for treating wastewater after treating combustible waste by providing a combustible waste treatment system according to the present invention at a sewage treatment plant.

Hereinafter, the combustible waste treatment system according to the embodiment of the present invention will be described. The combustible waste treatment system according to the embodiment of the present invention is a system for treating kitchen waste and used disposable diapers as combustible waste containing a large amount of water.

The combustible waste treatment system according to the present embodiment has a disinfection step of disinfecting the separately collected combustible waste, a drying step of dehydrating and drying the combustible waste disinfected in the disinfection step, and dehydration and drying in the drying step. It consists of a reuse process that reuses the materials that make up combustible waste. In the disinfection process, combustible waste is disinfected using a treatment liquid, and the treatment liquid after disinfecting the combustible waste is treated with water so that it can be disposed of. Further, in the disinfection step, the combustible waste is decomposed for each material constituting the combustible waste using the treatment liquid, the combustible waste is disinfected, and the treated liquid after the decomposition is treated with water so that it can be disposed of.

[Used disposable diaper processing system]
Hereinafter, a used disposable diaper processing system 1 for processing used disposable diapers, which are sanitary products as combustible waste, will be described. As shown in FIG. 1, the used disposable diapers 3 accumulated in the separate collection step 2 are disinfected and decomposed in the disinfection step 4. To disinfect and decompose the used disposable diaper 3, stir with a treatment liquid consisting of water, a decomposing agent, and a disinfecting / disinfecting agent. When the used disposable diaper 3 is stirred together with the treatment liquid, it is decomposed into a plurality of kinds of materials constituting the used disposable diaper 3. To stir the used disposable diaper 3 together with the treatment liquid, for example, a separator or the like is used.

The separator is generally composed of a tubular outer body separation tank and an inner body separation tank rotatably provided in the outer body separation tank. The inner body separation tank is provided with a plurality of holes formed by punching or the like on the outer circumference. The used paper diaper 3 is put into the inner body separation tank, the treatment liquid is supplied, and the inner body separation tank is rotated to stir the used paper diaper 3 together with the treatment liquid in the inner body separation tank. ..

When the used paper diaper 3 is agitated together with the treatment liquid in the inner body separation tank by the rotation of the inner body separation tank, pulp 5, plastic 6, and other materials (tape portion and other materials) are used as materials constituting the used paper diaper 3. It is decomposed into rubber). In addition, the polymer polymer is also decomposed by the treatment liquid, and the absorbed urine (sewage) is released and mixed with the treatment liquid. Next, when the treatment liquid is discharged from the inner body separation tank, solid pulp 5, plastic 6, and other materials remain in the inner body separation tank.

Pulp is also mixed in the drainage liquid containing the treatment liquid after use, which is drained from the inner cylinder separation tank. The pulp in the drainage can be separated from the water using a dehydrator or the like, dried and taken out. The extracted pulp can be used as a raw material for corrugated cardboard and the like.

Pulp 5, plastic 6, and other materials that are solids remaining in the inner body separation tank are dehydrated and dried in the drying step 7. The pulp 5 and plastic 7 dehydrated and dried in the drying step 7 are recovered. In addition, the treatment liquid discharged from the inner body separation tank is water-treated and discarded. In the drying step 7, the pulp 5, the plastic 6, and other materials, which are solids remaining in the inner cylinder separation tank, are dehydrated and dried by, for example, using a sorter.

The sorting machine includes a tubular outer body sorting tank, an inner body sorting tank rotatably provided inside the outer body sorting tank, and a drying air supply device that supplies dry air into the inner body sorting tank. It is generally composed of. A plurality of holes formed by punching or the like are provided on the outer circumference of the inner body sorting tank. Pulp 5, plastic 6, and other materials, which are solids decomposed by the separator, are put into the inner body sorting tank, and dry air is supplied to the inner body sorting tank to make the inner body sorting tank. By rotating, the pulp 5, the plastic 6, and other materials are dried.

In this case, water remains in the pulp 5, plastic 6, and other materials that are solids decomposed by the separator, and the pulp 5, plastic 6, and others cannot be separated, but by the sorter. By dehydrating and drying, pulp 5, plastic 6, and other materials can be separated and recovered.

The pulp 5 recovered in the drying step 7 is used as a raw material for producing corrugated cardboard 17 in the reuse step 8, and the plastic 6 is used as a raw material for producing solid fuel (RPF-A) 18 in the reuse step 8. Further, other materials (tape portion, rubber, non-woven fabric as materials constituting the disposable diaper) 22 are also used as raw materials for producing the solid fuel (RPF-A) 18 in the reuse step 8. Further, regarding the separator used in the disinfection process and the sorter used in the drying process, the separator for the used sanitary goods processing device and the processing of the used sanitary goods proposed in Japanese Patent Application No. 2017-065206 and Japanese Patent Application No. 2017-065207. It is preferable to use an apparatus sorter.

As described above, according to the processing system 1 of the used disposable diaper 3 according to the present embodiment, the used disposable diaper 3 containing a large amount of water was disinfected in the disinfection step 4, and dehydrated and dried in the drying step 7. Later, since the materials constituting the used disposable diapers 3 are reused, the used disposable diapers 3 can be reused without the need for an incinerator in the treatment of the used disposable diapers 3 containing water and without incinerating the used disposable diapers 3. ..

Therefore, according to this embodiment, it is possible to reduce the amount of waste incinerated and the waste incineration facility, and if it is possible to reduce the waste incineration facility, the construction cost of the expensive waste incineration facility and the maintenance cost of the waste incineration facility will also increase. It is possible to reduce the amount.

Further, according to the present invention, the used disposable diaper 3 can be treated hygienically, the amount of waste can be reduced, and a recycling-oriented society can be constructed by reusing the used disposable diaper 3. ..

Next, the calorific value of the used disposable diaper 3 will be described with reference to Table 1. Before use, disposable diapers are generally composed of pulp, polymer absorber, and plastic material, and do not contain human waste or water. As shown in column A of Table 1, the ratio of each material of the adult paper diaper in this state contains 0.52% of pulp, 0.20% of polymer absorber, and 0.28% of plastic. There is. The weight per 1 ton (1000 kg) of a disposable diaper is 520 kg for pulp, 200 kg for a polymer absorber, and 280 kg for plastic.

The water content ratio is 0%, that is, the calorific value per ton of disposable diapers before use in a state where human waste and water are not absorbed is 4880 Kcal. Assuming that the calorific value of pulp per unit weight (1 kg) is 4.000 Kcal and the calorific value of plastic per unit weight (1 kg) is 10.000 Kcal, the calorific value of plastic is 10.000 Kcal x 0. .28 = 2.800 Kcal, the calorific value of pulp is 4.000 Kcal x 0.52 = 2.080 Kcal, and it is calculated by the sum of the calorific values of plastic and pulp. However, the polymer absorbent is not converted into calorific value.

As shown in column B of Table 1, the used disposable diapers (1t) used in hospitals, facilities, and homes at the stage of being discharged absorb 3000 kg of human waste and water, and are about four times as much as the disposable diapers before use. It weighs 4000 kg. The water ratio of used disposable diapers used in hospitals, facilities, and homes is 75%, and the calorific value at this time is 770 Kcal / Kg. With this value, it is difficult to self-combust, that is, spontaneously ignite and burn, and when used disposable diapers are incinerated, they do not burn until 3000 kg of water contained in them evaporates.

Used disposable diapers (1t) at the stage of being used in hospitals, facilities, and homes, discharged, and then collected by a collection vehicle and collected in a garbage pit are shown in column C (scammer state "1") in Table 1. In addition, it absorbs 15,000 kg of water and weighs 16,000 kg, which is about 16 times that of a disposable diaper before use. In this case, the total weight of the used disposable diaper is 16 times as much as it absorbs water other than human waste in the collection vehicle and the garbage pit. The scammer state in column C of Table 1 refers to a substance in a state in which used paper diapers absorb water other than human waste. In the following description, the state in which the used disposable diaper absorbs water other than human waste is referred to as a scammer state.

In the scammer state "1" shown in column C of Table 1, the water ratio is 93.75%, and the calorific value at this time is -257 Kcal / Kg. Assuming that the calorific value of pulp per unit weight (1 kg) is 4.000 Kcal and the calorific value of plastic per unit weight (1 kg) is 10.000 Kcal, the calorific value of plastic is 10.000 Kcal x 0. .0175 = 175 Kcal, the calorific value of pulp is 4.000 Kcal x 0.0325 = 130 Kcal, and the sum of calorific values of plastic and pulp is 305 Kcal. Assuming that the calorific value per unit weight (1 kg) of water is 600 Kcal, the calorific value of water is -562 Kcal / Kg. The sum of the calorific value of plastic and pulp and the calorific value of water add up to -257 Kcal / Kg. At this value, it does not burn by itself, and heating the used disposable diapers to incinerate them evaporates the water absorbed by the used disposable diapers.

When used disposable diapers are accumulated in a garbage pit or the like, they absorb rainwater and moisture from other kitchen waste, etc., and columns D (scammer state "2") and E column (squamer state "3") in Table 1 ), The total weight of the used disposable diaper is 26 times (26000Kg), 31 times (31000Kg), 51 times the weight of the disposable diaper (1t) before use, as shown in column F (scammer state "4"). It will be doubled (51000Kg). The calorific value at this time is -388 Kcal / Kg and -423 Kcal / Kg. In the scammer states "2", "3", and "4", the water content was 96.15%, 96.77%, 98.04%, and these values did not self-burn and used disposable diapers. Heating to incinerate is evaporating the water absorbed by the used disposable diapers.

In this way, when a large amount of water is contained (4 to 51 times the product weight) like a used disposable diaper, a large amount of heat is required to evaporate the contained water, so that a phenomenon of negative heat occurs. To do. In this state, a combustion improver is required for drying.

On the other hand, according to the used disposable diaper processing system according to the present embodiment, the material constituting the used disposable diaper 3 is reused after being disinfected and decomposed in the disinfection step 4 and dehydrated and dried in the drying step 7. Therefore, in the treatment of used disposable diapers containing a large amount of water, an incinerator is not required, fuel for incineration is not required, and an incineration facility is not required. Therefore, it is possible to reduce the maintenance cost of the waste incineration equipment (cleaning plant) installed in each local government. Furthermore, by reusing the materials that make up used disposable diapers, resources can be reused and a recycling-oriented society can be constructed.

[Disposal system for kitchen waste]
Next, a food waste treatment system 10 that treats the food waste 9 as combustible waste containing a large amount of water will be described. As shown in FIG. 2, the kitchen waste 9 separately collected by the separate collection step 11 is separately collected in a state of being stored in a plastic bag or the like. The kitchen waste stored in the plastic bag or the like is taken out from the plastic bag in the bag breaking / crushing step 12a before being disinfected in the disinfection step 12. In this case, in the plastic bag or the like in which the kitchen waste is stored, garbage other than the kitchen waste may have a large shape. If large objects are mixed, equipment will be damaged in the subsequent process. For this reason, large-sized garbage is crushed after the bag is broken.

To disinfect the kitchen waste 9, for example, the kitchen waste 9 and a treatment liquid consisting of water and a disinfectant are put into an automatic disinfection / dehydrator, and the automatic disinfection / dehydrator or the continuous disinfection / dehydrator is operated to stir. .. The kitchen waste 9 disinfected in the disinfection step 12 is dried in the drying step 13. In the reuse step 14, the dried food waste 9 is added with the plastic 15 and the paper 16 to be used as a raw material for solid fuel (RPF). Further, when the kitchen waste 9 disinfected in the disinfection step 12 is dehydrated and dried, it becomes a raw material for biomass fuel.

Generally, kitchen waste 9 such as cooking waste contains chlorine (salt content such as sodium chloride). When such kitchen waste 9 is dried as it is and used as a raw material for biomass fuel, the salt content in the kitchen waste 9 volatilizes when the biomass fuel is burned. The volatilized salt damages the boiler and the like. Therefore, in the present embodiment, in the disinfection step 12, the amount of chlorine adhered is reduced by finally washing with water by an automatic disinfection dehydrator or a continuous disinfection dehydrator, and chlorine is dehydrated in the drying step 13. The amount of adhesion can be reduced.

When the kitchen waste 9 is disinfected in the disinfection step 12, the kitchen waste 9 may be in a so-called “sticky” state, but in this case, it is dried to be in a “smooth” state.

If the kitchen waste 9 is not incinerated, the disinfection process 12 will be performed by an automatic disinfection / dehydrator or a continuous disinfection / dehydrator, but it is assumed that used paper diapers may be mistakenly put in the kitchen waste. It is preferable to use a treatment liquid consisting of water, a decomposing agent, and a disinfectant / sterilizing agent.

According to the kitchen waste treatment system 10 according to the present embodiment, the kitchen waste 9 containing water is disinfected in the disinfection step 12, dehydrated and dried in the drying step 13, and then the kitchen waste 9 is reused. The treatment of the kitchen waste 9 containing water does not require an incinerator, and the kitchen waste 9 can be reused without being incinerated.

Therefore, according to this embodiment, it is possible to reduce the amount of waste incinerated and the waste incineration facility, and if it is possible to reduce the waste incineration facility, the construction cost of the expensive waste incineration facility and the maintenance cost of the waste incineration facility will also increase. It is possible to reduce the amount.

Further, according to the present invention, the kitchen waste 9 can be treated hygienically, the amount of the waste can be reduced, and the recycling-oriented society can be constructed by reusing the kitchen waste 9.

[Example of implementation location of combustible waste treatment system]
Next, an example in which the used disposable diaper treatment system 1 and the kitchen waste treatment system 10 described above are carried out at the sewage treatment plant 20 will be described. As shown in FIG. 3, when the used disposable diaper treatment system 1 is implemented in the sewage treatment plant 20, the reclaimed water 21 of the sewage treatment plant 20 is used as the water used in the disinfection step 4. That is, the used disposable diaper 3 is disinfected and decomposed using the reclaimed water from the sewage treatment plant 20, a decomposing agent, and a treatment liquid consisting of a disinfectant / sterilizing agent. Further, the treatment liquid after disinfecting and decomposing the used disposable diaper 3 in the disinfection step 4, that is, wastewater is discharged to the sewage treatment plant 20 after water treatment.

Further, when the above-mentioned kitchen waste treatment system 10 is carried out at the sewage treatment plant 20, the reclaimed water 21 of the sewage treatment plant is used as the water used in the disinfection step 12 for disinfecting the kitchen waste 9. That is, the kitchen waste 9 is disinfected by putting the reclaimed water from the sewage treatment plant 20 and the treatment liquid composed of a disinfectant / sterilizer into the automatic disinfection / dehydrator. Further, the treatment liquid after disinfecting the kitchen waste in the disinfection step 12, that is, the wastewater, is discharged to the sewage treatment plant 20 after the water treatment. Further, when the separately collected kitchen waste 9 is dehydrated and then incinerated, the wastewater from the dehydration is treated with water and then discharged to the sewage treatment plant 20.

By implementing the used paper diaper treatment system 1 and the kitchen waste treatment system 10 at the sewage treatment plant 20 in this way, the reclaimed water from the sewage treatment plant 20 can be used, so that it is necessary to use so-called fresh water. It is possible to save water. Further, since the treated wastewater can also be discharged to the sewage treatment plant, the wastewater can be discharged to the sewage treatment plant without flowing the wastewater into the sewer or the like, which simplifies the treatment of the treatment liquid.

In addition, it is preferable to install it underground as an implementation place of the combustible waste treatment system according to the present invention. At present, it was difficult to construct a waste incineration plant in urban areas due to the opposition of residents at the time of construction. Cases in which the consent of the residents cannot be obtained unless advanced environmental measures are taken to promote the construction of the incineration plant and facilities for returning to the surrounding residents (hot bath facilities using residual heat, swimming pools, outdoor facilities, etc.) are prepared. Is often seen.

Moreover, even if the construction is approved once, it is difficult to renew the incinerator or rebuild the incineration plant because the opposition movement may occur again when the incinerator is renewed or the incineration plant is rebuilt. Against this background, the reality is that the construction of an incineration plant requires enormous costs.

For the above reasons, by switching to the combustible waste treatment system according to the present invention, it becomes possible to make a cleaning plant without an incinerator, and solve the above-mentioned problems and problems that occur in the construction of the cleaning plant. It becomes possible.

Furthermore, in implementing the combustible waste treatment system according to the present invention, it is also an effective means to obtain the construction consent of the local residents by constructing a recycling factory for used disposable diapers and kitchen waste using the underground space. is there.

On the ground, people can live a healthy life in a lush environment, and in the underground space, a recycling factory will be set up as an alternative facility to the incineration plant, which has been the subject of general support and disagreement for construction. When installing, pay special attention to water, air health risks, foul odors, noise discomfort, changes in the ecosystem environment, and the impact on groundwater, which have been considered to be the reasons for opposition to construction.

On the other hand, if the underground space is used, it can be considered to be used as a disaster prevention facility. If there is a disaster prevention facility with a shelter function that emphasizes safety in the center of an urban area or in an artificially dense area underground, this place can be used even in the event of an unpredictable situation such as a war, terrorism, earthquake, or fire. By opening it, you can evacuate relatively safely.

Until now, waste treatment has been based on the principle of treatment within the own area under the Waste Management Law, but the conversion of these combustible waste treatment systems transcends regional boundaries, and realizes wide-area recycling and the people's It will emphasize safety and can be a promising public facility.

As described above, embodiments of the present invention have been disclosed, but it is clear that modifications can be made by those skilled in the art without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the claims.

The combustible waste treatment system according to the present invention can be applied to treat combustible waste containing a large amount of water in addition to used disposable diapers and kitchen waste.

1 Used disposable diaper processing system 3 Used disposable diapers 4, 12 Disinfection process 7, 13 Drying process 8, 14 Reuse process 9 Kitchen waste 10 Kitchen waste processing system 11 Separate collection process 12a Bag crushing / crushing process

Claims (4)

A combustible waste treatment system (10) that treats water-containing kitchen waste (9).
The combustible waste treatment system (10) is installed in a sewerage treatment plant (20) that purifies sewage from the sewer and discharges it as recycled water.
The combustible waste treatment system (10)
The separate collection step (11), in which the kitchen waste (9) is stored in a bag and separately collected,
The step of taking out the kitchen waste (9) from the bag in which the kitchen waste (9) is separately collected and stored, and
A disinfection step (12) of disinfecting the separately collected kitchen waste (9) with a treatment liquid containing reclaimed water treated at the sewerage treatment plant (20).
A drying step (13) of dehydrating and drying the kitchen waste (9) disinfected in the disinfection step (12), and
It consists of a reuse step (14) for reusing the material constituting the kitchen waste (9) dehydrated and dried in the drying step (13).
A combustible waste treatment system (10), characterized in that the treatment liquid after disinfecting the kitchen waste (9) is treated with water so that it can be disposed of and discharged to the sewage treatment plant (20). The combustible waste treatment system according to claim 1, wherein the step of taking out the kitchen waste (9) from the bag is a bag breaking / crushing step (12a). The disinfection step (12) according to claim 1 or 2, wherein the treatment liquid is used to decompose each of the materials constituting the food waste (9) and disinfect the food waste (9). The combustible waste treatment system (10) described. In the disinfection step (12), the kitchen waste (9) is stirred together with the reclaimed water and a treatment liquid consisting of a disinfectant / sterilizer.
The kitchen waste (9) is dried in the drying step (13), and the food waste (9) is dried.
Claims 1 to 1, wherein the food waste (9) dried in the drying step (13) in the reuse step (14) is reused as a raw material for solid fuel and used as a raw material for biomass fuel. Item 4. The combustible waste treatment system (10) according to any one of Item 3.

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