JP2002361215A - Method and device for microbial decomposition of organic waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for microbial decomposition of organic waste and a device therefor to carry out the method by which even organic waste containing high water content can be completely decomposed while avoiding problems of sludge and waste water accompanying the waste water treatment, and the treatment of the organic waste having high water content can be performed at a low cost without producing odor in an industrial level. SOLUTION: The method for microbial decomposition of organic waste and the device therefor to carry out the method include a solid liquid separation process (1) to separate excess water from the treating system, a microbial decomposition process (2) to carry out the microbial decomposition under aerobic conditions, and a circulating process (3) to circulate the excess water separated in the process (1) so as to keep the aerobic conditions in the reaction process (2).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for decomposing microorganisms in organic waste, and more particularly to a method for completely decomposing organic waste having a high water content by aerobic microorganisms. A method for microbial decomposition of organic waste that can avoid the problems of sludge and drainage associated with the treatment of liquid waste, can be carried out at low cost, and can be carried out odorlessly. To a device for doing so.

[0002]

2. Description of the Related Art Waste disposal is a serious problem in terms of environmental protection, and is of great social interest. Among them, with respect to organic waste, microbial treatment is useful because decomposition products and residues do not pollute the environment and energy consumption is small. In the microbial treatment of organic matter, the organic matter is mainly decomposed into carbon dioxide and water, and the residue containing microbial metabolites can be composted. For this reason, microbial treatment is applied to and implemented in household garbage (solid matter) treatment or large-scale waste treatment facilities. However, organic matter decomposition by microorganisms is performed under aerobic conditions,
It is difficult to apply to liquid waste which becomes anaerobic due to excess water, and organic waste is generally treated separately as solid and liquid.

In the treatment of liquid waste, excess sludge, odor,
Includes many issues to be solved, such as water pollution. When the solid content concentration of the liquid waste is low (that is, the BOD load is low), the waste is treated as wastewater at the basic time, but sludge is generated in the wastewater treatment. Further, in the case of a slurry having a high solid content, it is inappropriate to directly supply the slurry to a wastewater treatment facility, and at present, it is necessary to separately treat the solid content and water (sewage). Therefore, in order to treat liquid waste on land, the energy consumption is large and the cost is high even for wastewater treatment of low-concentration wastewater. It costs.

For this reason, liquid (slurry) waste discharged from fisheries factories, processing factories, liquor / food processing factories, etc., depends in large part on ocean dumping. However, ocean dumping of these wastes is desirable in terms of odor and pollution. In fact, the Convention on the Prevention of Marine Pollution by Waste and Other Dumping (London Treaty) has reduced the dumping of marine wastes since 2002. Completely banned. There is a lack of absolute capacity to treat liquid waste, which has relied heavily on marine dumping, on land, so that organic waste can be efficiently treated regardless of its form. Method for decomposing microorganisms in products and apparatus (equipment, facility or system) capable of realizing the method quickly
The emergence of is longing.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the situation of the organic waste treatment as described above,
It enables the processing of liquid organic waste, which was previously incompatible with microbial degradation, which allows fisheries factories, processing plants, alcoholic beverages,
Any form of organic waste such as liquids, solids and oils discharged from various places such as food processing factories, kitchens and kitchens can be treated with high processing capacity. And a microorganism decomposition method for organic waste, which can be completely treated without causing a problem of sewage and sludge by the treatment, and can be carried out at low cost and can suppress generation of odor in the carried out treatment process. It is intended to provide a device (equipment, facility or system) that can be implemented.

[0006]

Means for Solving the Problems The present inventor has made intensive studies to enable the treatment of organic wastes, particularly liquid organic wastes by microbial decomposition, and has formed a microorganism treatment system in which wood chips are present. However, if the water content exceeding the water content that can be held by the wood chips can be removed from the treatment system as surplus water, aerobic conditions for microbial decomposition can be ensured, and the present invention is applicable even to organic waste in liquid form. I thought of it.

However, if this is to be carried out on a large scale which can be carried out industrially, there is a practical problem that the activity of the above-mentioned decomposition reaction is reduced in spite of the aerobic condition from which excess water is removed. occured. As a result of continued investigations, when the throughput increased, the biomass energy due to microbial decomposition unexpectedly increased, and due to the enormous exothermic reaction, water evaporated more than expected and the activity of the microorganisms slowed down. The result was that the microbial reaction could not be performed. In other words, in the microbial treatment of organic waste at the industrial level, while it is necessary to remove excess water from the treatment system in order to establish aerobic conditions, water that evaporates due to the heat of reaction and becomes inadequate for microbial activity It was found that it was necessary to replenish the processing system. Therefore, if wood chips are used as a filtration filter to remove excess water and replenish insufficient water, the microbial decomposition reaction can be carried out at the industrial level. At this time, the excess water once removed from the treatment system is circulated and supplied to the treatment system If it is, it is found that the complete treatment can be carried out efficiently without generating wastewater even in the case of an organic waste having an excessive amount of water. Device was completed.

That is, the method for microbial decomposition of organic waste according to the present invention comprises the steps of: (1) obtaining a water content that can be substantially retained by a wood chip by itself from a treatment system containing wood chips, organic waste and water in a fermentation tank; Solid-liquid separation step of separating excess water as surplus water; (2) in the treatment system where the surplus water is separated, the organic waste is subjected to an exothermic microbial decomposition reaction under aerobic conditions in the presence of decomposing bacteria; A microbial decomposition reaction step of mainly decomposing into carbon dioxide and water, and (3) a method of maintaining the water content of the treatment system evaporating by the exothermic reaction at a water content level that can be substantially maintained by the wood chips. And a circulating step of circulating the excess water separated in (1) to the reaction step (2).

In the present invention, in the step (1), usually, the wood chips are used as a filter, and the excess water is filtered and separated. The organic waste may include a liquid waste such as an aqueous slurry organic waste and / or an edible waste oil. In the present invention, the organic waste having excessive moisture can be treated, and the moisture in the treatment system can be the moisture derived from the organic waste. In the above step (1), the amount of organic waste supplied to the treatment system is desirably 10/1 to 5/1 in terms of mass ratio to the wood chips. The amount of wood chips in the processing system is preferably 1 m ³ or more, and if wood chips are present in such an amount, the absolute amount of biomass energy can be ensured and reliable reproducibility can be obtained.

In the microbial decomposition reaction step (2),
A mode in which air is forcibly supplied to the processing system is desirable. It is preferable that the treatment system is stirred. In particular,
For example, by circulating or supplying the circulating water and / or organic waste to the processing system via the apparatus by using a stirring transfer device for stirring a processing system movably installed in the fermenter, and the like. In addition, the stirring and mixing of the processing system and the supply of air can be performed efficiently. In the above step (3), it is desirable to circulate excess water so that the wood chips of the treatment system maintain a water content of 50% or more.

[0011] In a preferred embodiment of the method of the present invention, the method further comprises a step of circulating the wood chips after the completion of the microbial decomposition reaction in the step (1). It is also preferable to use the used wood chips after the microbial decomposition reaction as a compost material.

According to the present invention, there is also provided an apparatus (equipment, facility or system) for carrying out the above-described method for decomposing organic waste into microorganisms, the apparatus including a wood chip loaded therein, An organic waste having a function of separating as a surplus water, a water that substantially exceeds the water content that can be held by the wood chip from a treatment system consisting of the wood chip and the organic waste and water supplied thereto; A fermentation tank for causing a microbial decomposition reaction, a water tank for storing the surplus water separated above, and a circulation path for circulating surplus water from the fermentation tank to the fermentation tank via the water tank, At least.

[0013] The above apparatus is further a stirring and transferring apparatus for stirring a processing system movably installed in the fermentation tank, wherein the circulating water and / or organic waste from the circulation path of the water storage tank is stirred. Is also preferable, which includes a stirring and transferring device provided with a mechanism for supplying to the processing system via the stirring and transferring device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for decomposing an organic waste by microorganisms and an apparatus for carrying out the method will be described in detail. FIG. 1 schematically shows an embodiment of the present invention in a process flow. The microbial decomposition method for organic waste according to the present invention includes the following (1) solid-liquid separation step, (2) microbial decomposition reaction step, and (3) circulation step.

(1) Solid-Liquid Separation Step In the present invention, first, a treatment system containing wood chips, organic waste and moisture is formed in a fermenter. The wood chip is used as a carrier for microorganisms (degrading bacteria). Wood chips are
It has a porous structure, so it does not reduce water retention,
It has a honeycomb-shaped conduit and a complex-shaped (large surface area) surface that allows easy entry of bacteria, while maintaining air permeability, and is viscous. Thus, wood chips provide the proper amount of moisture, air (oxygen), and temperature required for microbial survival and activity. The wood chips as described above adhere to organic matter and also act as a filter for sewage accompanying organic waste as described later.

As the wood chip source, thinning materials, construction waste materials, pruning wastes from plant trees (including weeds wastes) and the like can be widely used without any particular limitation. Since these wood chips contain lignin, which is hardly decomposed, as a main component, it takes more days to decompose the microorganisms to be described later than the organic wastes to be treated. For this reason, the function of the wood chip can be maintained for a long time, and the wood chip can be recycled for use after the decomposition treatment of the organic waste. Although the wood chip is not particularly limited, it is usually desirable to subdivide it into about 1 to 100 mm. In the present invention, as the carrier, in addition to the above-mentioned wood chips, leaves, bark, weeds, and the like, which are easily degraded by microorganisms, may be contained (hereinafter, the wood chips or these may be referred to as carriers).

The amount of wood chips is preferably 1 m ³ or more. If wood chips are present in such an amount, the absolute amount of biomass energy can be secured and reliable reproducibility can be obtained. If the amount of wood chips is about 1 m ³ or more, 10
Due to biomass energy that cannot be seen with a small liter-sized test device, the temperature can be raised in a short time even if the absolute amount of the processed material is small, but the amount of wood chips that form the processing system from the viewpoint of using the biomass energy effect is More preferably, it is 5 m ³ or more.

The amount of the organic waste supplied to the fermenter is usually 1% by mass with respect to the wood chips (dry base).
It is desirable to be about 0/1 to 5/1. The organic waste to be subjected to the biodegradation treatment in the present invention may be derived from any animal or plant, and its form is not particularly limited, regardless of its form such as liquid or solid. Specific examples include animal and plant residues discharged from marine processing factories, alcoholic and food processing plants, garbage discharged from homes and kitchens, garbage, juice waste, shochu waste liquid, edible waste oil, okara, and liquid Anything can be treated, such as sludge. In particular, in the present invention, the organic waste may include a liquid. The liquid material here widely refers to a liquid material regardless of whether it is aqueous or oily, and may be, for example, an aqueous solution such as juice, an aqueous slurry containing solid organic matter, or an oily material such as edible waste oil.

The solid organic waste is pulverized if necessary. There is no problem if the fish bones are large in size or if they are used as they are, but it is desirable to grind them in the case of large bones such as cows and pigs. Further, among the above, it is also possible to combine the processing with a high BOD load and the processing with a low BOD load. Specifically, for example, a solid substance conventionally treated with a microorganism and a liquid substance such as a slurry that could not be treated can be mixed in advance or separately supplied to a fermenter. In addition, edible waste oil, oil mud, etc., with a high BOD load can be added to the liquid with a low BOD load. In particular, when the absolute amount of the organic substance is small and sufficient heat generation cannot be obtained in the following reaction step (2), B
It is desirable to secure heat generation by adding waste having a high OD load or the above-mentioned wood chips that are easily decomposed by microorganisms such as leaves, bark, and weeds.

The treatment system for the microbial reaction includes the above wood chips,
Although water is included together with the organic waste, the water only needs to be water derived from the organic waste. For example, water can be made to exist in the initial treatment system by introducing an organic waste having excessive moisture such as an aqueous slurry. In the fermenter, it is preferable that the wood chips, organic waste and water are mixed so as to form a uniform treatment system as a whole. When such a treatment system is formed, for example, the wood chips and the organic waste slurry may be mixed in advance and supplied to the fermenter, or the fermenter may be loaded with a predetermined amount of wood chips in advance. Alternatively, organic waste may be supplied. Among these, the latter is preferred from the viewpoint of workability and filtration. Further, the organic waste to be treated does not necessarily need to be put into the fermentation tank at one time, and the solid content or oil content of high BOD, or the high water content or aqueous solution, etc. may be changed according to the heat of reaction or moisture as required. , Can be input with priority as appropriate.

In the present invention, first, water (sewage) exceeding the amount of water that can be contained by the wood chips is separated and removed as surplus water from the treatment system as described above. Specifically, the wood chips, organic waste, and a mixture containing water are allowed to stand, and the wood chips are used as a filter, and excess water not absorbed and retained in the wood chips is filtered (natural) from the treatment system. To separate. The separated surplus water (sewage) is usually removed from the fermentation tank and stored in a water tank via a circulation path.

As described above, the water content of the treatment system is set to substantially the water content that the wood chips can self-hold. Moisture content (dry base) when wood chips are naturally dried is about 4
It is said to be about 5%. The treated wood chips need to be kept humid than this natural drying. When the water content of the wood chips is 50% or less, the action of microorganisms is extremely reduced, so that it is necessary to maintain at least 50%. After natural filtration using a wood chip as a filter, the water content (water content) of the wood chip that can be held by itself is usually about 60%. Considering the water remaining in the gaps between the wood chips, the water content in the woody layer is 65%. It is estimated to be about 70%. Therefore, the water content of the treatment system can be estimated based on the water content of the wood chips, and is about 60 to 70%.
It is desirable to be about. In addition, when it exceeds 70%, it usually becomes an anaerobic state, but as described later, the reaction step (2)
When air is forcibly supplied to the
%, The reaction (fermentation) is possible. In the treatment system from which surplus water is separated as described above, air circulation is ensured,
In addition, the water content is appropriate and the aerobic microorganisms are active.

(2) Microbial Decomposition Reaction Step In the present invention, in the treatment system in which the surplus water is separated,
In the presence of the decomposing bacteria, the organic waste undergoes an exothermic microbial decomposition reaction under aerobic conditions, and is mainly decomposed into carbon dioxide and water. The decomposing bacteria may be any as long as they can essentially decompose organic substances into carbon dioxide and water under aerobic conditions. Such a degrading bacterium is a bacterium that produces cellulase, which is an organic degrading enzyme, and naturally exists, including those present in the above-mentioned wood chip. Therefore, the microbial decomposition reaction spontaneously occurs by mixing the wood chip and the organic matter, but it is also preferable to increase the concentration of the degrading bacteria in the wood chip provided to the treatment system. For example, natural useful microorganisms such as photosynthetic bacteria, Bacillus bacteria, lactic acid bacteria, and yeast are collected and degraded bacteria that have increased fermentation power through several generations of culture under certain conditions are cultured to be present in the wood chip. It is also preferable to keep it.

The microbial decomposition reaction under the aerobic condition by the above-mentioned decomposing bacteria is an exothermic reaction, and organic waste is mainly decomposed into carbon dioxide and water. The heat of the reaction (heat generation) causes the temperature of the processing system to rise to 60 ° C. or higher in a short time, whereby the water in the processing system, that is, the water generated by the reaction and the water initially present in the processing system evaporate.

In carrying out the above reaction, it is preferable to stir and vent the inside of the fermenter in order to ensure aerobic conditions of the treatment system. For this stirring, for example, a stirring transfer device that can move in the fermentation tank can be used.
Also, it is preferable to return the surplus water and / or wood chips described later into the fermentation tank through the stirring and transferring device, because stirring, homogeneous mixing, and further, air supply can be performed simultaneously, which is preferable. The stirring is desirably usually performed twice or more a day, more preferably about 3 to 5 times. Further, in a large-capacity processing system, oxygen supply for maintaining aerobic conditions may not be sufficient only with air supply by stirring. For this reason, it is usually desirable to forcibly supply air to the treatment system, for example, it is preferable to aerate from the bottom of the fermenter.

In the latter half of the reaction, as soon as several hours have passed after the object to be treated has been supplied, the water evaporating power decreases as the reaction temperature decreases, approaching the anaerobic condition of excessive water content, and the action of decomposing bacteria decreases. Tend. Under the anaerobic condition where the treatment system is excessively hydrated, the treatment system tends to emit odor.
It is preferable to maintain the aerobic condition of about 0 to 70% to carry out the microbial decomposition reaction efficiently and without emitting odor. At this time, in order to evaporate the water, heat may be applied to the reaction system by blowing hot air as necessary. The progress of the microbial decomposition reaction can be confirmed, for example, by measuring carbon dioxide gas. In the measurement example, about 93% of the total carbon content in the object to be treated (organic matter) can be detected as carbon dioxide gas. It can be said that organic matter was almost completely decomposed.

In the present invention, the organic (waste) is decomposed into carbon dioxide gas and water as described above, and essentially no decomposition residue is generated, and excess water removed from the processing system is treated as described below. And the water present in the treatment system is evaporated by the heat of reaction, so the treatment system after the reaction is substantially composed of wood chips, wastewater (sewage) and decomposition residues derived from microbial decomposition of organic waste. There is an advantage that the problem described above does not occur. In particular, liquids (slurries) with excessive amounts of water and small amounts of organic substances, which were previously incompatible with microbial degradation
Nevertheless, according to the present invention, the processing can be performed in a self-contained manner, which is a great advantage of the present invention.

(3) Excess Water Circulation Step In the present invention, in order to maintain the water content of the treatment system evaporated by the exothermic reaction in the above (2) substantially at a water content level that the wood chips can self-hold. Excess water separated in (1) is circulated to the reaction step (2).
Excess water is returned from the water tank at any time so that the wood chips of the treatment system maintain a water content of at least 50% as described above. The surplus water circulated is originally sewage introduced into the treatment system accompanying the organic waste, and by returning this sewage to the treatment system again and circulating, the water evaporates due to the heat of reaction, Organic components in the sewage are captured by a wood filter and decomposed by microorganisms. Thereby, the organic waste provided in the fermenter is completely treated with both the solid content and the water content. In the present specification, complete treatment is defined as substantially mineralization of all organic carbides and evaporation of all wastewater due to generated heat.

Although the above-described processing varies depending on the processing object, the processing amount, and the like, usually, one cycle is defined as one day.
Day or 2-4 days. The wood chips can be returned to the processing system for use. The treated chips are usually dried by residual heat of the reaction, and the dried chips are returned. The use life of the wood chips in the fermentation tank varies depending on the processed material, the processing amount, and the like, but usually, the wood chips may be replaced two to three times a year.

In the present invention, used wood chips can be used as compost raw materials, and if they are taken out and deposited for several months, stable compost with a scent of humus can be obtained. Useful. In particular, the used wood chips of the present invention contain fertilizer components such as nitrogen, phosphoric acid, and potassium, enzymes that are metabolites of microorganisms, antibiotics against soil pathogens, and the like in a well-balanced manner, and are extremely good organic fertilizers.

<Apparatus> The present invention also provides an apparatus (equipment, facility, or system) for implementing the above-described method for decomposing organic waste into microorganisms. Specifically, for example, a water content that includes a wood chip loaded therein and that can be substantially retained by the wood chip from a treatment system composed of the organic waste and moisture supplied thereto. With the function of separating excess water as surplus water,
A fermenter for biodegrading organic waste, a water tank for storing the surplus water separated above, and a circulation for circulating surplus water from the fermenter to the fermenter via the water tank. And a device (equipment, facility or system) including at least a road.

The fermentation tank, water storage tank and circulation path can be appropriately selected from known ones as long as they can perform their respective functions. For example, the above apparatus can be configured by forming a fermentation tank by excavating the ground, extracting surplus water from the bottom of the tank, and returning it to the fermentation tank via a water storage tank. The bottom of the fermenter may have holes for draining excess water and venting, and the bottom may be formed by a gravel layer, a porous plate, or the like.

The apparatus according to the present invention preferably has a mode in which, in addition to the fermentation tank, the water storage tank, and the circulation path, additional means described in the above-mentioned method for decomposing organic waste into microorganisms can be carried out. The specific modes may be those which can be generally implemented as long as the functions are provided. As a preferred embodiment, a device provided with a stirring transfer device for stirring a processing system movably installed in the fermentation tank is preferable. In particular, a stirring and transfer device provided with a mechanism for supplying circulating water and / or organic waste from the circulation path of the water storage tank to the treatment system via the stirring and transfer device is preferable. Further, an aeration device for supplying air to the processing system, a water content of the processing system, a measuring device for measuring the temperature, etc. may be provided, and further, data from these measuring devices may be recorded,
A device for controlling transmission may be provided. If necessary, a cooling tower or the like having functions such as deodorization, dehumidification, and dust reduction may be provided.

According to the present invention as described above, in treating organic waste, (1) sludge which is a problem in water treatment is not generated. (2) There is no drainage problem at the water treatment facility (equipment). (3) High-concentration waste liquid (or highly water-containing organic waste) that was unsuitable for both conventional aqueous treatment and incineration waste treatment
Processing and garbage can be processed. (4) Initial and running costs are low. (5) It does not emit odor substantially. (6) Can be processed with large capacity. (7) The organic waste is completely treated by decomposition and vaporization, and the carrier can be returned and reused or used as compost, and has an effect that secondary sludge from the treatment system is not generated. Accordingly, land-based treatment of highly water-containing organic waste, which relied on ocean dumping, is also possible, and the method and apparatus for decomposing organic waste according to the present invention are extremely useful in industry.

[0035]

According to the present invention, organic waste can be completely decomposed by aerobic microorganisms, and the problems of sludge and drainage accompanying the treatment of liquid waste can be avoided. The present invention provides a method for decomposing organic waste by microorganisms, which can be carried out odorlessly, and an apparatus for carrying out the method.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a process flow of a method for decomposing a microorganism into organic waste according to the present invention.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C05F 17/02 C12M 1/00 H C12M 1/00 C12N 1/00 S C12N 1/00 B09B 3/00 ZABD (72) Inventor Fumitaka Hashimoto 831 Tenkenji, Mine-cho, Mikiki-gun, Saga Prefecture 1F term (reference) 4B029 AA04 AA21 BB02 BB06 CC02 CC07 EA03 EA11 EA16 EA18 EA20 4B065 AA01X AA57X AC20 BB22 BC35 BC42 BC34 BC34 BC34 BC34 BC34 BC34 BC34 BC34 BC34 BC34 BC34 BC34 BC34 AA02 BA03 BA04 CA13 CA19 CA42 CC08 DA03 DA09 DA10 DA11 4D059 AA07 BA03 BA27 BA34 BA56 BE13 CA08 EA01 EB01 4H061 AA02 AA03 CC42 CC60 DD20 EE02 EE03 EE64 EE66 FF06 GG12 GG43 GG49 GG54 GG70 LL25

Claims (12)

[Claims] (1) Solid-liquid separation for separating, as surplus water, water from a treatment system containing wood chips, organic waste and water in a fermentation tank, which substantially exceeds the water content that can be held by the wood chips. (2) In the treatment system in which the surplus water has been separated, microorganisms that cause the organic waste to undergo an exothermic microbial decomposition reaction under aerobic conditions in the presence of a decomposing bacterium and mainly decompose to carbon dioxide and moisture. Decomposition reaction step, and (3)
In order to maintain the water content of the treatment system evaporated by the exothermic reaction substantially at a water content level that can be maintained by the wood chips, the surplus water separated in the above (1) is subjected to the reaction step (2). A method for biodegrading organic waste, comprising a circulation step of circulating. 2. The surplus water is filtered and separated in the step (1) using the wood chips as a filter.
The method for microbial decomposition of organic waste according to item 1. 3. The method according to claim 1, wherein the organic waste contains an aqueous slurry organic waste and / or an edible waste oil. 4. The method according to claim 1, wherein the water in the treatment system is water derived from organic waste. 5. The method according to claim 1, wherein in the step (1), the amount of organic waste supplied to the processing system is 10 /
The method for decomposing microorganisms of organic waste according to any one of claims 1 to 4, wherein the ratio is 1 to 5/1. 6. The method for decomposing microorganisms of organic waste according to claim 1, wherein the amount of wood chips in the treatment system is 1 m ³ or more. 7. The method according to claim 1, wherein in the step (2), air is forcibly supplied to the treatment system. 8. The microorganism of organic waste according to claim 1, wherein in the step (3), excess water is circulated so that the wood chips of the treatment system maintain a water content of 50% or more. Disassembly method. 9. The method according to claim 1, further comprising a step of circulating the wood chips after the completion of the microbial decomposition reaction to the step (1). 10. The method according to claim 1, wherein the used wood chips after the microbial decomposition reaction are used as compost raw materials. 11. A processing system comprising a wood chip loaded therein and comprising the wood chip and organic waste and water supplied thereto, the water content that the wood chip can substantially self-hold. With a function of separating excess water as surplus water, a fermentation tank for microbial decomposition reaction of organic waste, a water tank for storing the surplus water separated above, and surplus water from the fermentation tank, A circulation path for circulating the fermentation tank through the water storage tank.
An apparatus for performing the method for decomposing organic waste into microorganisms according to any one of claims 10 to 10. 12. A stirring and transferring device for stirring a treatment system movably installed in the fermentation tank, wherein the circulating water and / or organic waste from the circulation path of the storage tank is transferred by stirring. The apparatus according to claim 11, further comprising a stirring and transferring apparatus provided with a mechanism for supplying the processing system via the apparatus.