JP2002293681A - Method of producing bark-like compost - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of producing good-quality bark-like compost from plant wastes which are substantially not effectively utilized from heretofore as main raw materials and the method of producing the bark-like compost which is more excellent in production efficiency as compared with the conven tional methods. SOLUTION: This method of producing the bark-like compost comprises adding and mixing the organic wastes containing potassium consisting of food wastes, such as soup and sauce, and food wastes, such as strained lees of tofu (soybean curd) and strained lees of coffee beans to the plant wastes, such as pruned trees, waste materials of buildings and felled plants to form organic raw materials having a moisture content of 50 to 60%, mixing these materials with the fermentation products of aerobic ultra-high-temperature bacteria which can be grown at >=85 deg.C or their microbial cell mixture or the fermentation products of their microbial cell cultured and effecting the ventilation fermentation thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for producing bark-like compost. More specifically, the present invention relates to a method for producing compost similar to ordinary bark compost using plant waste other than bark as a main raw material. Normal `` bark compost '' is a fertilizer fermented and ripened by adding a nitrogen source such as chicken manure or urea to bark of hardwood or conifer, but `` bark-like compost '' in the present invention is Bark may also be used as one of the raw materials, but it refers to fertilizers made by fermenting a wide range of plant waste such as pruned trees of street trees, building waste or cut down vegetation as the main raw material. Say. Therefore,
The "bark-like compost" of the present invention should be called "bark-like compost" to be precise, but since it has a rather complicated feeling, it is referred to as "bark-like compost".

[0002]

2. Description of the Related Art In order to maintain and maintain the beauty of a city,
Pruning street trees regularly, rebuilding buildings,
Because it is necessary to improve the environment, such as by cutting vegetation, a large amount of plant waste such as pruned trees and building waste, cut vegetation and wood chips is constantly generated. Conventionally, these plant wastes contain a large amount of hard-to-degrade lignin and cellulose protected by lignin, so that composting requires a long period of time. Making compost is difficult. Bark is only used as a raw material in bark compost. For this reason, most of these plant wastes are currently left in the mountains or riverbeds, crushed and buried in the fields, or subjected to incineration such as open burning. Due to the large size, effective processing means are desired.

[0003] Among plant wastes, pruned trees and wood chips contain many lignin and cellulose, and many are contaminated with pesticides.
Chemicals used as paints or adhesives may remain in waste materials of buildings, so even if fertilizers are manufactured using these as raw materials, fertilization may instead harm crops. is there.

[0004] The usual bark compost mainly composed of bark is
It is known as a compost that has a large fertilizing effect because it is soft and easily embraces the air in the soil and has little resistance when the roots of the crop elongate. However, the conventional method of producing bark compost involves depositing bark in the field and performing a preliminary fermentation treatment, then crushing coarsely, adding chicken manure, ammonium sulfate, urea, a fermentation promoter, etc. The method of depositing and composting has been adopted, which has the disadvantage of requiring a large site and a long treatment period.

[0005]

SUMMARY OF THE INVENTION In view of the above situation, the present invention provides a method for producing a bark-like compost of the same high quality as a bark compost using, as a main raw material, plant waste which has been rarely used. Is the first task.
It is a second object of the present invention to provide a method for producing a bark-like compost having higher production efficiency than conventional methods.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors focused on a method of using a fermentation product of an aerobic ultra-thermophilic bacterium as a fermentation promoting material (seed fungus). As a result, the present invention has been completed.

That is, the invention according to claim 1 of the present invention is characterized in that an organic material having a water content of 50 to 60% obtained by adding and mixing an organic waste containing potassium to a plant waste, This is a method for producing a bark-like compost by mixing the fermentation products of the aerobic ultra-thermophilic bacteria capable of growing or a mixed cell thereof or a culture of these cells with aeration fermentation.

Further, the invention according to claim 2 of the present invention is characterized in that potassium-containing organic waste is added to and mixed with the strip-shaped plant waste, and the surface of the strip-shaped plant waste is mixed. The organic waste containing potassium is adhered and the water content is 50-60.
% Of an organic material, and a mixture of the organic material and an aerobic ultra-thermophilic bacterium capable of growing at 85 ° C. or higher, or a mixed cell thereof, or a fermentation product of these cell cultures, followed by aeration fermentation to obtain a bark-like compost. It is a manufacturing method.

The invention according to claim 3 of the present invention is characterized in that 30 to 40 parts of organic waste containing potassium is added to and mixed with 60 to 70 parts of plant waste and the water content is 50 to 6 parts.
An aerobic ultra-thermophilic bacterium or a mixed cell thereof or a fermentation product of these cell cultures, which can be grown at a temperature of 85 ° C. or higher with 40 to 60 parts of the organic material as a raw material of 0%.
This is a method for producing a bark-like compost by mixing a part with a mixture and performing aeration fermentation.

[0010] The invention according to claim 4 of the present invention provides, as plant waste, pruned trees, building waste,
The method for producing a bark-like compost according to any one of claims 1 to 3, wherein at least one of the cut plants, wood chips, and sawdust is used.

Further, the invention according to claim 5 of the present invention is characterized in that, as the organic waste containing potassium, food waste such as food waste liquid such as soup and sauce, tofu squeezed coffee, coffee bean squeezed coffee, etc. The method for producing a bark-like compost according to any one of claims 1 to 4, wherein at least one of a product, livestock and poultry manure, and human excrement is used.

Further, the invention according to claim 6 of the present invention is a bacillus belonging to the genus Bacillus as an aerobic ultrathermophilic bacterium. Accession No. FERMP-1 deposited at the Research Center for Biotechnology, Industrial Technology Research Institute, Patent Microorganisms Depositary
5085, FERMP-15086, FERMP-15087, FERMP-15536, FE
RMP-15537, FERMP-15538, FERMP-15539, FERMP-1554
0, FERMP-15541, 1 selected from bacteria of FERMP-15542
The method for producing a bark-like compost according to any one of claims 1 to 5, wherein at least one kind of cells or a mixed cell thereof is used.

Hereinafter, the present invention will be described in more detail. The main raw material of the bark-like compost according to the present invention is plant waste other than bark, such as pruned trees, building waste, felled vegetation, wood chips, sawdust, and the like, and one or more of these are used.
It is preferable to use those plant wastes that have been crushed into small pieces in advance using a chipper or the like.
Bark, straw, dead grass, fallen leaves, etc. may be used in combination with these main raw materials.

In the method for producing a bark-like compost according to the present invention, an organic waste containing potassium is used as an auxiliary material. The reason why the organic waste containing potassium is used as an auxiliary material is because the above-mentioned plant waste, which is the main material, has a low potassium content, so that it is replenished to produce a nutrient-balanced fertilizer. . Therefore, as the auxiliary raw material of the bark-like compost according to the present invention, there are powdery waste liquids such as roasted meat sauce and soba soup rich in potassium, scum of tofu (that is, okara), scum of coffee beans and the like. It is preferable to use one or more of granular or muddy food waste, livestock and poultry manure, human excrement, and the like. It is not limited to. In addition, protein raw materials that contain potassium, phosphorus, nitrogen, micronutrients essential for plant growth in a well-balanced manner, such as discarded seafood and meat, offal of seafood and birds and animals, and blood of birds and seafoods , Edible waste oil, raw sludge and the like can also be used as suitable raw materials in the present invention.

In the present invention, it is preferable to mix the organic waste containing potassium as an auxiliary material with 20 to 30 parts with respect to 60 to 70 parts of plant waste as a main material. In any case, both are sufficiently mixed to obtain an organic material. The concrete method is to crush plant waste into small pieces, add food waste liquid such as grilled meat sauce and soba soup or powdery or granular food waste such as tofu pomace to this, Mix well and leave for a while,
It is preferable to attach these food wastes to the surface of the strip-shaped plant waste. By performing pretreatment in this way, even plant waste such as pruned trees, building waste, and wood chips that are difficult to ferment, organic fermentation that is easily fermented adheres to the surface, and as a whole, it becomes uniform. Since they are mixed, the function of the aerobic ultrathermophile used as a fermentation promoter can be maximized, and fermentation and decomposition are easily promoted. In particular, since many building waste materials are dry, it is preferable to add and mix a food waste solution such as soup or sauce to impregnate the inside as much as possible. It is a matter of course that other organic waste containing potassium may be used as an auxiliary material together with the food waste or the food waste liquid or in place of the food waste or the food waste liquid. Further, the organic raw material after the pretreatment is appropriately dried or water-adjusted so as to have a water content of 50 to 60%, preferably about 55% as a whole, to adjust the water content. There is a need. The reason why the water content of the organic material is controlled within this range is that the aerobic ultra-high temperature bacteria can be actively activated if the water content is within this range.

At 85 ° C.
The fermentation products of the aerobic ultrahigh-temperature bacteria or their mixed cells which can grow as described above, or fermentation products of these cell cultures are added in substantially equal amounts, and the whole is mixed and aerated to start fermentation. An aerobic ultra-thermophilic bacterium that can grow at 85 ° C. or higher refers to an aerobic ultra-thermophilic bacterium having a temperature zone suitable for activity of 85 ° C. or higher. Can be used regardless of species. Further, in addition to the aerobic ultrathermophile itself, a mixture of two or more kinds of the cells or a culture of these cells may be used. In the present invention, those capable of operating at 30 ° C. or more and less than 55 ° C. are classified as mesophilic bacteria and 55 ° C. or more,
Those that can be activated at a temperature lower than 0 ° C are classified as thermophilic bacteria, and those that can be activated at 75 ° C or higher are classified as ultra-thermophilic bacteria.

Among the aerobic ultrathermophilic bacteria capable of growing at 85 ° C. or higher in the present invention, one of the present inventors, one of the present inventors, Shoichi Yamamura, is a member of the Kirishima volcanic belt in Makion-cho, Aira-gun, Kagoshima Prefecture. Bacillus belonging to the genus Bacillus found in soil and deposited at the National Institute of Advanced Industrial Science and Technology (currently the Ministry of Economy, Trade and Industry, National Institute of Advanced Industrial Science and Technology) -150
85, FERMP-15086, FERMP-15087, FERMP-15536, FER
MP-15537, FERMP-15538, FERMP-15539, FERMP-1554
0, FERMP-15541, 1 selected from bacteria of FERMP-15542
More than one kind of cells or a mixed cell thereof. In addition, several kinds of the above-mentioned aerobic ultrahigh-temperature bacteria are disclosed in Japanese Patent No.
No. 221. And the rest,
A patent is pending (JP-A-10-229874 and others).

The aerobic ultrathermophile or a mixed cell thereof, or a culture of these cells and their fermentation products used in the present invention are produced, for example, as follows. That is, a soil containing an aerobic ultra-thermophilic bacterium that can grow at 85 ° C. or higher is collected, a sucrose solution is added to the soil, fermentation is performed under aeration at a high temperature, and the cells are cultured. Is mixed with an organic material such as organic waste, for example, raw sludge, and fermented at a high temperature with further aeration to produce a cell culture of an aerobic ultra-thermophilic bacterium or a mixed cell thereof. Furthermore, repeating the process of mixing raw sludge as an organic material and fermenting it under high temperature while repeating the fermentation while mixing the cell culture of the aerobic ultrathermophile or a mixed cell thereof with the cell culture results in a smooth powdery fermentation. The product can be obtained. The fermentation product of the cell culture of the aerobic ultra-high temperature bacteria or a mixed cell thereof can be used as it is as a high-quality fertilizer. Less than,
The production method of the bark-like compost according to the present invention will be described in more detail by way of examples.

[0019]

[Example 1] <Production example of cell culture of aerobic ultra-high temperature bacteria or a mixed cell thereof> Kirishima volcanic belt collected at Makion-cho, Aira-gun, Kagoshima Prefecture Equal amount of soil collected from the paddy field where the green moss grows,
An aqueous sucrose solution was added to the mixed soil, and the mixture was fermented at 40 to 60 ° C. for 3 to 15 days with aeration. Next, this fermented product is mixed with approximately equal amounts of raw sludge and fermented while aerating,
A cell culture was obtained. Cell cultures capable of growing at 85 ° C. or higher were selectively collected from the cell cultures and used to produce fermentation products.

[0020]

Example 2 <Production example of fermentation product of cell culture of aerobic ultra-high temperature bacteria or mixed cells thereof> Raw sludge was deposited as an organic material in a fermenter and collected in Example 1. Approximately equal amounts of cell cultures of aerobic ultrathermophilic bacteria growing at a temperature of not less than ℃ were added and mixed, and air was continuously blown from the bottom of the fermenter. 2
From the day, the temperature rose rapidly, and the start of fermentation was confirmed. In addition, we continued to send the air without interruption and occasionally turned it back, trying to distribute the air as evenly as possible throughout. After 42 days from the start of aeration, the temperature was lowered, and a fermentation product in a mature state (water content: 20%) was obtained. Half of this fermentation product is shipped as fertilizer, the other half is left in the fermenter as it is, and an approximately equal amount of raw sludge is added and mixed as an organic material thereon, and air is blown from the bottom of the fermenter. A second fermentation was carried out in the same manner, and a second fermentation product was obtained 40 days after the start of aeration. In this manner, the fermentation was repeated five times, and the fifth and fifth step yielded a free-flowing homogeneous powdery fermentation product (water content: 20%).

[0021]

Example 3 <Production Example of Bark-like Compost> FIG. 1 is a plan view of a pretreatment tank of an organic material used in a production example of bark compost of the present invention, and FIG. 2 is a side sectional view thereof. . FIG. 3 is a side sectional view of a fermenter used in a bark compost production example of the present invention. 1 and 2, 1 is about 20 m in length, about 3 m in width, and about 1 m in depth
Pretreatment tank. The floor 11 of the pretreatment tank 1 is mortar-finished, and the walls 12 are made by stacking blocks. Also, the longitudinal wall surface of the pretreatment tank 1
Rails 13 and 13 are laid on the upper edge of 12 and 12. 2 is
It is a self-propelled stirrer, and is linked to the motor unit 21 which has a running motor (0.4 kw) and a blade rotation motor (0.75 kw), a transmission mechanism, a running control panel, etc. Rotary stirring blade 22 hanging down to 1cm
(30 cm in diameter). In the self-propelled stirrer 2, the wheels 23, 23 provided on the bottom of the motor unit 21 are fitted to the rails 13, 13 of the pretreatment tank 1. When activated, the agitation blade 22 can be rotated and run in the longitudinal direction of the pretreatment tank 1 freely, and by switching the switch, it can run in the right and left directions in FIGS. 1 and 2.

In the pretreatment tank 1, plant waste XX, such as pruned trees, building waste, and various wood chips, which have been crushed in advance into chips of about 0.5 to 3 mm x 5 to 20 mm with a chipper.・ Lay out approximately 70 kg in total so as to be substantially uniform (it has a depth of about 30 cm from the floor).
Grilled meat sauce (expiration date expired) about 2
Sprinkle 0kg evenly and leave it for about 4 hours, then add tofu squeeze YY about 30kg
Was sprayed almost uniformly and left for a while.

After about one hour has elapsed, the motor of the motor section 21 is started, the switch is operated, and the self-propelled stirrer 2 is once moved to the right corner of FIGS. 1 and 2 and the stirring blade 22 is rotated. While moving, the self-propelled stirrer 2 was run leftward from the right corner in FIGS. 1 and 2, and after traveling to the left corner, reciprocating running about 10 times was repeated so as to reverse rightward. Then, the rotation of the stirring blade 22 of the self-propelled stirrer 2 sufficiently mixes and mixes the vegetable waste XX impregnated with the grilled meat sauce and the tofu scum YYY. An organic raw material was produced in which plant waste and food waste were completely integrated.

When the granular tofu scum Y is sufficiently adhered to the surface of the flaky plant waste X, the self-propelled stirrer 2 is stopped and left as it is for a while. Since the measured value was 52%, it was adjusted to 55% by adding a small amount of water, and the entire amount of the organic material was transferred to the fermenter in FIG. In addition, in the empty pretreatment tank 1, the plant waste and the food waste were newly charged, and the pretreatment was repeated in the same manner as described above.

In FIG. 3, reference numeral 4 denotes a fermenter with a roof (also referred to as a fermentation yard) used for ordinary compost production.
And the concrete partition walls 41, 42, 43, 44 and the floor surface
One section has a frontage of 6 m, a depth of 15 m, and a height of 4 m, and includes three sections of A, B, and C. The floor surface 45 of the fermenter 4 is provided with vents 4a, 4b, and 4c each having a width of 30 cm in a depth direction substantially at the center of the floor 45 for each section.
4a, 4b and 4c are connected to a blower 6 via a duct 5. An air heater 7 is used when the temperature is low. The front yard of the fermenter 4 has a width of about 5 m so that a shovel loader or the like can run.

The organic material in the pretreatment tank 1 was transferred to the section A of the fermentation tank 4 and deposited. A fermentation product of the cell culture of the hyperthermophile produced in Example 2 was further added to the organic material in substantially equal amounts, and mixed. The blower 6 is operated to take in the outside air, and the vent at the bottom of the fermenter 4 is provided through the duct 5.
It was sent into fermenter 4 from 4a. If ventilation is continued as it is, the temperature rises on the second day and 80 on the third day.
° C and rose to 90 ° C on the third day, partially. When the temperature was lowered to 70 to 60 ° C., turning back was performed using a shovel loader, and after a while, the temperature increased again and reached 80 to 85 ° C. When the temperature began to drop, the work was repeatedly turned up and the temperature was increased while the airflow was continued. On the 45th day after the start of the airflow, the powdered fertilizer and the fluffy small long-grained fertilizer were mixed. A perfect ripe compost could be obtained.
Half of this fully-ripened compost is packed and shipped as bark-like compost, and the other half is left in the fermentation tank, and the same amount of the next organic material processed in the pre-treatment tank 1 is added to it, After mixing, aeration was started and the second fermentation was started. In this way, fermentation was repeated many times, and bark-like compost was continuously produced semi-continuously. The section B of the fermenter 4 was charged with the organic material treated in the pretreatment tank 1 in the section B 10 days later than the section A, and in the section C 12 days later than the section B. Aeration fermentation was carried out in the same manner as in the case of the above, to produce bark-like composts. When the aeration fermentation is repeated for each section of the fermenter, bark-like compost can be continuously produced semi-continuously.

In the above embodiment, the organic material and the fermentation product of the cell culture of the aerobic ultra-thermophilic bacterium were mixed in substantially equal amounts. However, the present invention is not necessarily limited thereto. The range may be 40 to 60 parts each.

The bark-like compost produced in Example 3 has an organic matter content of 80% or more, a C / N ratio of 35 or more, and a total amount of potassium of 0.3% or more. (Established by the Association). Further, it was confirmed that no chemicals or preservatives remained at all, unlike the conventional fertilizer produced using plant waste as a main raw material.

Further, when the bark-like compost produced in Example 3 was applied to a field, the effect of soil improvement peculiar to ordinary bark compost and the balanced effect of nutrients derived from organic waste as an auxiliary material were obtained. As a result, it was found that the root of the crop elongation was very good and an antagonistic effect of killing pests and various harmful bacteria contained in the soil was observed.

[0030]

As described above in detail, the present invention relates to an organic waste containing a calcium content in a plant waste which cannot be used as a fertilizer raw material because it contains a large amount of lignin and cellulose. By adding and mixing and using both together, the plant waste that is difficult to ferment is wrapped in organic waste containing calum such as food waste that is easy to ferment, and aerobic as a fermentation promoter Since we decided to use fermented products of ultra-thermophilic bacteria or their mixed cells or cultures of these cells, we succeeded in converting plant waste that did not adapt to fermentation into extremely useful bark-like compost. Things. In particular, when the present invention employs a method of making plant waste into strips and attaching organic waste such as food waste to the surface thereof, fermentation can proceed more efficiently. it can.

Further, the present invention requires a long period of time for composting because it contains a large amount of hardly decomposable lignin and cellulose protected thereby, and obtains high-quality compost. An object of the present invention is to provide a method for producing extremely high-quality bark-like compost in a short period of time using plant waste such as pruned trees, building wastes, and felled vegetation that could not be obtained. That is, according to the present invention, bark-like compost can be completed in a period of about 40 to 50 days, as compared with the case where conventional production of bark compost took several months to 10 months, and furthermore, a pretreatment tank And can be processed in a fermenter,
It is an object of the present invention to provide a production method with extremely high production efficiency without requiring a large deposition area. Further, the bark-like compost produced by the method according to the present invention is easy to put air into the soil because it is smooth and plump, and promotes root elongation.
Since it contains organic nutrients such as phosphorus, nitrogen and essential micronutrients in a well-balanced manner and can kill various harmful bacteria and pests that are often present in the soil, its fertilizer effect is extremely excellent.

Further, according to the present invention, it is possible to easily convert the felled trees, building wastes, and the like, which had conventionally been difficult to dispose of, into useful fertilizers. Therefore, the present invention
It can greatly contribute to the maintenance and improvement of urban aesthetics.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of an organic material pretreatment tank used in a production example of a bark-like compost of the present invention.

FIG. 2 is a schematic side cross-sectional view of a pretreatment tank for an organic material used in a production example of a bark-like compost of the present invention.

FIG. 3 is a schematic cross-sectional view of a side surface of a fermenter used in a bark-like compost production example of the present invention.

[Explanation of symbols]

1 Pretreatment tank 11 Floor of pretreatment tank, 12 Same wall, 13 Rail laid on upper edge of pretreatment tank 2 Self-propelled stirrer 21 Motor part, 22 Stirrer blade 3 Power supply cable 4 Fermenter 41.42.43・ 44 Partition wall, 4a ・ 4b ・ 4c vents 5 Duct 6 Blower 7 Air heater X Stripe-like plant waste, Y Tofu scum A ・ B ・ C Fermenter partition

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C05F 11:00 B09B 3/00 A 3:00) ZABD (C05F 15/00 11:00 5:00) ( 72) Inventor Shinjiro Kanazawa 1-16-2, Sugamo, Toshima-ku, Tokyo, Japan 811 (72) Inventor Shoichi Yamamura 3-27-4, Nishi-Ishiki, Kagoshima-shi, Kagoshima 366 No. 2 Toda Sangyo Co., Ltd. F-term (reference) 2B022 AA05 BA11 BA14 BA18 BB01 4D004 AA02 AA03 AA04 AA12 BA04 CA04 CA19 CB26 CB36 CC07 DA02 DA06 DA09 DA10 4H061 AA02 CC36 CC38 CC39 CC41 CC42 EE02 GG03 EE41 GG03 EE02 GG03 EE02 GG03 GG49 GG68 GG69 GG70 HH07 HH15 LL02 LL25 LL26

Claims (6)

[Claims] 1. An organic raw material having a water content of 50 to 60% obtained by adding and mixing an organic waste containing potassium to a plant waste, and an aerobic ultrathermophilic bacterium or a mixed bacterium capable of growing at 85 ° C. or higher. A method of producing a bark-like compost by mixing a body or a fermentation product of a culture of these cells with aeration fermentation. 2. An organic waste containing potassium is added to and mixed with the strip-shaped plant waste, and the potassium-containing organic waste is adhered to the surface of the strip-shaped plant waste to obtain a water content of 50%. ６０60% of organic raw material, and this organic raw material and 85%
A method of producing a bark-like compost by mixing aerobic ultrathermophiles or a mixed cell thereof or a fermentation product of these cell cultures capable of growing at a temperature of not less than ℃ and aeration fermentation. 3. An organic raw material having a water content of 50 to 60% by adding and mixing 30 to 40 parts of organic waste containing potassium to 60 to 70 parts of plant waste.
６０60 parts and an aerobic ultra-thermophilic bacterium capable of growing at 85 ° C. or higher, or a mixed cell thereof, or 40-60 parts of a fermentation product of these cell cultures, and aeration fermentation to produce a bark-like compost. Method. 4. The bark according to any one of claims 1 to 3, wherein as the plant waste, at least one of pruned trees, building waste, cut vegetation, wood chips, and sawdust is used. How to make compost. 5. The organic waste containing potassium,
5. The method according to claim 1, wherein one or more of food waste liquid such as soy sauce and sauce, food waste such as tofu pomace, coffee bean pomace, livestock and poultry manure, and human excreta are used. A method for producing the bark-like compost according to any one of the above. 6. A bacterium belonging to the genus Bacillus as an aerobic ultrathermophilic bacterium. Accession number deposited with
FERMP-15085, FERMP-15086, FERMP-15087, FERMP-1
5536, FERMP-15537, FERMP-15538, FERMP-15539, F
The bark compost according to any one of claims 1 to 5, wherein one or more cells selected from bacteria of ERMP-15540, FERMP-15541, and FERMP-15542 or a mixed cell thereof is used. How to make.