JP5979591B2 - Wood composting method and system and slope greening method and system using them - Google Patents

Description

  The present invention relates to a composting method and system for composting wood, particularly wood made from damaged trees, and a slope greening method and system using them.

  For slopes such as embankments, cuts, river embankments and seawalls, etc., it is necessary to prevent slope erosion, delamination, rockfall, etc. by protecting them with appropriate means. Even when a natural disaster such as heavy rain, an earthquake, or a tsunami causes a tree that had previously covered the slope to slide down or run out and lose its slope protection function, it is necessary to provide slope protection to the exposed surface. .

  As a method of slope protection, spraying concrete or mortar is known as a typical method, but recently, in order to consider the environment, slope protection by greening has been increasingly adopted. It was.

  As a method of protecting the slope by greening, it is common to spray a vegetation substrate made of an aqueous slurry in which plant seeds, fertilizer, water, chip material, adhesive, and the like are stirred and mixed, on the slope. According to the above, after spraying on the slope, the roots of the plants sprouted after a certain period of time spread into the inclined ground, and the inclined ground can be stabilized.

  Here, as described above, when a tree slides down or flows out due to a natural disaster, it can be effectively used as a vegetation base material for planting the damaged area without discarding the damaged tree in order to further promote environmental protection. desirable.

  Under such circumstances, there is known an expansion softening treatment or steam explosion (hereinafter referred to as an expansion softening treatment) in which a felled tree is appropriately chipped with a wood crusher and then the wood chip is rapidly decompressed under high temperature and high pressure. In addition, according to such swelling and softening treatment, the wood structure is destroyed from the inside, so that it becomes possible to change the wood chip from a prickly feel peculiar to the chip to a soft feel and improve water absorption, and thus logging. It is said that wood can be used effectively as a moisture regulator necessary for barn bedding and composting, and can be pre-mixed with seeds and admixtures as a vegetation base and sprayed onto the slope (patent) Reference 1).

Japanese Patent No. 4440601

  However, when wood chips that have been subjected to swelling softening are used as vegetation substrates as they are, if the composting of the wood chips proceeds after spraying, a large amount of nitrogen is consumed in the vegetation base due to microbial activity in the composting process. As a result, the vegetation base becomes in a so-called nitrogen starvation state, which hinders subsequent plant growth and makes it difficult to plant the slope.

  By the way, in order to avoid nitrogen starvation, if a large amount of nitrogen is added as a vegetation base, there is only a problem that exotic species grow excessively due to their vigorous growth power, and maintenance management such as cutting is a heavy burden In addition, there are concerns about the impact on the ecosystem that non-native species with strong growth might destroy native species.

  On the other hand, if the composting of the wood chips does not proceed after spraying, the wood chips only have the effect of improving drainage, and not only cannot the wood chips be used effectively, but also the fertilizer for greening Need to be added separately. By the way, the wood chip that has been swelled and softened will destroy the internal structure, so that the fine voids will increase and the water absorption will improve, but it will drain immediately after the rain, and will have the water retention capacity necessary for plant growth. It's hard to say.

  When using wood chips that have been swelled and softened in this way as vegetation bases, it is difficult to apply appropriate greening to protect slopes, whether or not the wood chips compost within the vegetation base after spraying. The problem is that there is still a limit to the effective use of damaged trees.

  On the other hand, when the timber-softened wood chips are used as a vegetation base material after being composted in advance, microbial decomposition is likely to proceed because the internal tissue is destroyed, and composting is relatively fast. That said, composting still has a long period of time and requires a large composting yard or otherwise transported to a treatment facility.

  For this reason, there has been a problem that it is difficult to effectively use the damaged trees in an economically efficient manner.

  The present invention has been made in consideration of the above-described circumstances, and composting method and system of wood that can be used as a vegetation base material after composting damaged trees on the field, and a slope using them. An object is to provide a greening method and system.

To achieve the above object, the heat composting process timber according to the present invention is that as described in claim 1, treated膨軟of the processing apparatus of wood chips is a composting target, resulting in bulging softening treatment The temperature of the processed chips discharged from the processing apparatus is lowered to 30 ° C. or higher and lower than 100 ° C. so that energy is utilized and a temperature environment suitable for microbial activity is achieved, and the processing is within the temperature range A composting chip is prepared by adding and mixing a fungus body for microbial decomposition of the treated chip and a nutrient material for enhancing the microbial activity of the fungus body, and curing the composting chip. is there.

  Moreover, the composting method of the wood which concerns on this invention produces the said wood chip by crushing the damaged tree.

In addition, as described in claim 3 , the wood composting system according to the present invention has a processing device for swelling and softening wood chips to be composted, and the temperature of the processed chips discharged from the processing device. A temperature lowering means for lowering the temperature to 30 ° C. or higher and lower than 100 ° C. so that the thermal energy generated by the swelling and softening treatment is utilized and a temperature environment suitable for microbial activity, and the treated under the temperature range The chip is provided with a curing means for curing a chip for composting, in which a fungus body for microbial decomposition of the treated chip and a nutrient material for increasing the microbial activity of the fungus body are added.

In addition, as described in claim 4 , the slope revegetation method according to the present invention stirs and mixes the compost produced by the composting method according to claim 1 or claim 2 together with another vegetation base material. A material slurry is prepared, and the vegetation substrate slurry is sprayed on the slope.

  Moreover, the slope greening method which concerns on this invention adds a clogging prevention material to the said vegetation base material slurry before the said spraying process.

Further, as described in claim 6 , the slope greening system according to the present invention includes a processing device for swelling and softening wood chips to be composted, and a temperature of the processed chips discharged from the processing device. Temperature lowering means for lowering the temperature to 30 ° C. or higher and lower than 100 ° C. so that the thermal energy generated in the swelling and softening process can be used and a temperature environment suitable for microbial activity, and the processed chip under the temperature range A curing means for curing a chip for composting in which a fungus body for microbial decomposition of the treated chip and a nutritional material for increasing the microbial activity of the fungus body are added, and a compost produced by the curing means A spraying hose connected to the spraying machine and a tip of the spraying base material slurry prepared by the spraying machine. Via the spray nozzle attached those configured so that it can be blown to the slope.

  In the method and system for composting wood according to the first invention, first, wood is crushed into chips to produce wood chips, and then the wood chips are subjected to swelling and softening treatment by a processing device.

  Next, the temperature of the processed chip discharged from the processing apparatus is lowered in advance to 30 ° C. or more and less than 100 ° C. by the temperature lowering means, and the processed chip is microbially decomposed into the processed chips within the temperature range. A fungus body and a nutrient material for increasing the microbial activity of the fungus body are added to obtain a composting chip.

  Next, the chip for composting is placed on a curing means, and the chip for composting is cured and composted while appropriately turning over or performing water management as necessary.

  In this way, since the cells are placed in a temperature environment suitable for microbial activity from the beginning in the form of using the heat energy generated by the swelling and softening treatment, composting of the treated chips is possible without providing a separate heat source. The required time can be greatly shortened, and the thermal energy generated by the swelling and softening process can be converted and used for composting, so that the environmental burden can be reduced on a global scale.

  In addition, the period for composting has been greatly shortened, so that various types of timber such as thinned and waste wood, as well as timber made from harvested and damaged trees, can be treated as before. It is possible to compost appropriately at the place where they are generated or used without securing a vast composting yard, and thus making effective use of each of the above-mentioned timbers in an economical manner it can.

  The processing apparatus can be appropriately selected from known apparatuses used for the swelling and softening process. In the present invention, the expansion and softening process includes a process by steam explosion.

  The temperature lowering means is for reducing the temperature of the processed chip, for example, 150 ° C. to 300 ° C. to a temperature range of 30 ° C. or higher and lower than 100 ° C. As long as it can be lowered, its configuration is arbitrary, but it is typically possible to adopt an air-cooling type that cools with ambient air, specifically, a state where the processed chip is exposed to the atmosphere It is possible to construct a storage tank or a temporary storage yard that can be accommodated in a stationary manner, or a belt conveyor that contacts processed chips with air at a constant relative speed.

  As long as the curing means can perform curing for composting the composting chips, the configuration thereof is arbitrary. For example, the conventional composting yard can be configured in a small scale.

  The temperature of the processed chip needs to be lowered to a temperature range of 30 ° C. or more and less than 100 ° C., which is a microorganism having high microbial activity in the middle temperature range (30 ° C. to 50 ° C.) as a microorganism contributing to composting. This is because a group of microorganisms and a group of microorganisms having high microbial activity in a high temperature range (50 ° C. to 65 ° C.) are mainly targeted. This is because even psychrotrophic bacteria have low microbial activity and degradation is not accelerated.

  Here, when the temperature range of 30 ° C. or higher and lower than 100 ° C. is set to 55 ° C. or higher and lower than 70 ° C., thermophilic bacteria having a relatively fast decomposition rate will be used, so that the composting period is further shortened. Is possible.

  As described above, since the period for composting is greatly shortened, fermentation promoters are not required or the amount of use can be greatly reduced, but if this is used, composting is possible. The period can be further shortened, and for example, composting can be completed within one month.

In the wood composting method according to the second invention (reference invention) , as in the first invention, the wood is first crushed into chips to produce wood chips, and then the wood chips are swelled and softened. In the reference invention , a chip for composting by adding a microbial cell for microbial decomposition of the processed chip and a nutritional material for enhancing the microbial activity of the microbial cell to the processed chip immediately after the swelling and softening process is finished. Then, the composting chip is placed on a curing means, and the composting chip is cured and composted while appropriately turning over or performing moisture management as necessary.

  In this way, as in the first invention, since the bacterial cells are placed in a temperature environment suitable for microbial activity from the beginning in the form in which the thermal energy generated by the swelling and softening process is used, even without a separate heat source, The period required for composting of treated chips can be significantly shortened, and the thermal energy generated by the swelling and softening process can be converted to composting energy, reducing the environmental impact on a global scale. Can be achieved.

  In addition, the period for composting has been greatly shortened, so that various types of timber such as thinned and waste wood, as well as timber made from harvested and damaged trees, can be treated as before. It is possible to compost appropriately at the place where they are generated or used without securing a vast composting yard, and thus making effective use of each of the above-mentioned timbers in an economical manner it can.

  Adding and mixing bacterial cells and nutrients to the processed chip immediately after the expansion and softening process is completed without performing a special temperature reduction operation on the processed chip discharged from the processing apparatus that performs the expansion and softening process. This means that the cells and nutrients are rapidly added and mixed at the temperature immediately after being discharged from the processing apparatus. If the temperature is 30 ° C to 50 ° C, the mesophilic bacteria should be 50 ° C to 65 ° C. For example, it can be composted with high-temperature bacteria, and at higher temperatures, it can be composted using thermophilic microorganisms having microbial activity exceeding 100 ° C.

  If the wood chips in each of the above-described inventions are made by crushing damaged trees, these trees can be reused locally as vegetation bases for slope protection.

  Damaged trees mainly include trees (including driftwood) that have fallen or run off due to natural disasters such as torrential rain, earthquakes, or tsunamis.

  In the slope revegetation method according to the third aspect of the invention, the compost produced by the composting method described above is stirred and mixed with other vegetation bases to produce a vegetation base slurry, and the vegetation base slurry is used as a slope. The vegetation base is layered on the slope, and each composting method described above significantly reduces the composting period as described above. Or, without securing a vast composting yard, composting can be performed as appropriate at the location where the wood is generated or used, so that processing of wood chips, softening treatment, composting, preparation of vegetation base slurry and slopes A series of processes called spraying can be intensively performed in the vicinity of the greening target portion.

  Here, if the anti-clogging material is added to the vegetation base material slurry before the spraying step, the vegetation is generated by the spraying machine, the spraying hose connected thereto, and the spraying nozzle attached to the tip of the spraying hose. It is possible to prevent the base slurry from being clogged.

  The clogging prevention material can be composed of, for example, activated carbon.

  In the slope revegetation system according to the fourth invention, as in the wood composting system according to the first invention, the wood chips formed by crushing the wood into chips are swelled and softened by the processing device, and the processing device The temperature of the treated chips discharged from the cell is lowered in advance to 30 ° C. or more and less than 100 ° C. by a temperature lowering means, and the treated cells that are under the temperature range are subjected to microbial decomposition and the cells Nutritional materials for enhancing microbial activity are added to make chips for composting, the composting chips are cured by a curing means and composted, and then the compost is stirred and mixed with other vegetation base materials to grow vegetation. A base slurry is prepared, and the vegetation base slurry is sprayed on the slope to form a vegetation base on the slope.

  If it does in this way, it will become possible to intensively advance a series of processes, such as processing of a wood chip, swelling softening, composting, production of a vegetation base slurry, and slope spraying in the vicinity of a greening target part.

Schematic of the composting system 1 for implementing the composting method which concerns on 1st Embodiment. The graph which showed the temperature change of the curing period and the chip | tip 6 for composting in the composting method of the wood which concerns on 1st Embodiment. Schematic of the slope planting system 31 used when slope planting is performed using the composting method according to the first embodiment. Schematic of the composting system 41 which concerns on 2nd Embodiment. The schematic of the slope greening system 51 which concerns on 2nd Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a method and system for composting wood according to the present invention, and a method and system for slope greening using them will be described with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

[First embodiment]
FIG. 1 is a schematic view showing a composting system 1 used in the composting method according to the second invention (reference invention) . As shown in the figure, a wood composting system 1 includes a crusher 2 that primarily crushes a tree that has fallen due to slope failure, and a primary crusher 2 produced by the crusher. In order to increase the microbial activity of the microbial cell of the processing device 4 that swells and softens (secondary pulverization) the crushed chip 3, the microbial cell that decomposes the processed chip into the processed chip 5 that is manufactured by the processing device And a composting yard 7 for curing a composting chip 6 to which nutrient materials such as nitrogen, phosphorus and potassium are added.

  The processing device 4 swells and softens the primary crushing chip 3, that is, places the primary crushing chip 3 under high temperature and high pressure, and rapidly depressurizes the primary crushing chip 3, so that the internal tissue (cell wall) of the primary crushing chip 3 Is supposed to destroy.

  The processing device 4 may be appropriately selected from known devices, but in the composting method according to the present embodiment, the fungus body and its nutritional material are added to the processed chip 5 immediately after the swelling and softening processing is completed. Therefore, the temperature at the time of discharge is set to approximately 150 ° C. or less, desirably 100 ° C. or less.

  The cells can be appropriately selected according to the temperature of the processed chip 5 discharged from the processing device 4. If the temperature is 30 ° C to 50 ° C, the mesophilic bacteria can be selected at 50 ° C to 65 ° C. If there are thermophilic bacteria, they can be adopted.

  The composting yard 7 mounts the composting chip 6 and can cure the composting chip while managing the temperature and moisture of the composting chip 6.

  In order to implement the wood composting method according to the present embodiment using the composting system 1 described above, first, a tree that has fallen due to slope collapse is used as a raw material, and the raw material is formed into chips by a crusher 2. The primary crushing chip 3 is produced by crushing.

  Next, the primary crushing chip 3 is placed on the belt conveyor 8, and then charged into the processing device via the charging port of the processing device 4.

  Next, the primary crushing tip 3 is swelled and softened by the processing device 4.

  Next, composting is performed by adding fungus bodies for microbial decomposition of the treated chips and nutritional materials for increasing the microbial activity of the treated cells to the treated chips 5 immediately after the swelling and softening treatment by the processing device 4 is completed. The chips for composting are transferred to the composting yard 7 by the belt conveyor 9.

  The cell body and nutrient material can be composed of, for example, a fermentation accelerator (bacteria, nutrient material, and narrowly defined fermentation accelerator) commercially available from Fujimi Kogyo Co., Ltd. under the name Accel Component (registered trademark). In addition to this, a fermentation aid commercially available from the company under the trade name of Assist Component (registered trademark) or Calorie Component (registered trademark) can be used as appropriate.

  Next, the composting chip 6 is cured in the composting yard 7 and composted.

  In composting, the composting chips 6 are stacked so as to have a trapezoidal cross section, and a waterproof sheet 10 is laid on the surface to prevent an excessive increase in moisture content due to rainwater infiltration. As necessary, the composting is appropriately turned over so that the composting progresses uniformly.

  In this way, the cells added to the composting chip 6 are placed in a temperature environment of, for example, 30 ° C. to 40 ° C. from the beginning of curing as shown in FIG. It is quickly decomposed by the microbial activity of the cells, and the temperature rises to 60 ° C. in one week from the start of curing. Furthermore, by turning back at this time, composting is completed after 3 weeks.

  By the way, when composting is started at a normal outside temperature, it takes about one month to reach 60 ° C as shown by the alternate long and short dash line in the figure, and composting is completed. It takes about two months from then.

  As described above, according to the method of composting wood according to the present embodiment, the temperature at which the cells are suitable for microbial activity from the beginning in the form in which the thermal energy generated by the swelling and softening treatment by the treatment device 4 is used. Because it is placed in the environment, the period required for composting of the treated chips 5 can be greatly shortened without providing a separate heat source, and the thermal energy generated by the expansion and softening process is converted into energy for composting. Since it can be used, the environmental burden can be reduced on a global scale.

  In addition, the period for composting is greatly shortened, so that trees that have fallen due to slope collapse can be transported to treatment facilities as before, or they can be damaged without securing a large composting yard. It becomes possible to compost at a place, and thus the above-mentioned tree can be effectively used in a form excellent in economic efficiency.

  In the present embodiment, wood chips are produced by first crushing trees that have fallen due to slope failure, but the wood from which the wood chips are produced is not limited to such trees and has been cut down. It is possible to arbitrarily select from various timbers such as timber made from trees and damaged trees as well as thinned timber and waste wood.

  Further, in this embodiment, the swelling and softening process is performed as secondary crushing, but it is arbitrary how the normal crushing process is performed prior to the swelling and softening process. For example, the normal crushing process is repeatedly performed. Later, the softening treatment may be performed as tertiary crushing.

  In the present embodiment, no particular mention has been made of compost obtained by composting the composting chip 6, but typically this can be used as a vegetation base for slope planting.

  FIG. 3 is a schematic view showing a slope greening system 31 for performing slope greening using the compost obtained in the above-described embodiment, and slope greening is performed using the slope greening system 31. In this case, a tree shattered due to the collapse of the slope 32 is used as a raw material, and the raw material is crushed into chips by a crusher 2 according to the same procedure as described above to produce a primary crushing chip 3 which is a wood chip. Then, the primary crushing chip is swelled and softened by the processing device 4, and the microbial activity of microbially decomposing the processed chip on the processed chip 5 immediately after the swelling and softening process is finished and the microbial activity of the microbial body are increased. The composting chip 6 is added by adding nutrient materials for the composting, and the composting chip is placed on the composting yard 7 and cured to produce compost. , And other vegetation base materials such as adhesives, After mixing, a vegetation base material slurry is prepared, and the vegetation base material slurry is pumped to the vicinity of the slope surface 32 through the spray hose 34, and then the spray nozzle 35 attached to the tip of the spray hose 34. By spraying on the slope 32, a vegetation base 36 is laminated on the slope.

  In this way, since the composting method of the above-described embodiment can greatly shorten the composting period, the trees that have fallen due to the collapse of the slope 32 are transported to a treatment facility or a large composting yard is created. Even if it is not secured, composting is quickly performed in the affected area, and as a result, a series of processes such as processing of wood chips, swelling and softening, composting, preparation of vegetation base slurry and slope spraying are performed near the affected area In this way, it becomes possible to proceed intensively, and thus it is possible to proceed with restoration of the damaged part by slope planting and reuse of the damaged tree in an economical manner.

  In addition, if a clogging prevention material is added to the vegetation base material slurry before the spraying step, the spraying machine 33, the spraying hose 34 connected thereto, and the spraying nozzle 35 attached to the tip of the spraying machine 33 are used. Thus, the clogging of the vegetation base slurry can be prevented.

  The clogging prevention material can be composed of, for example, activated carbon.

[Second Embodiment]
Next, a method and system for composting wood according to the second embodiment will be described. In addition, about the components substantially the same as 1st Embodiment, the same number is attached | subjected and the description is abbreviate | omitted.

  FIG. 4 is a schematic view showing a wood composting system 41 according to the first invention. As shown in the figure, a wood composting system 41 includes a crusher 2 that primarily crushes trees that have fallen due to slope collapse, and a primary crushing tip 3 that is produced by the crusher. A processing device 4 ′ for swelling and softening treatment (secondary crushing), a belt conveyor 42 as a temperature lowering means for lowering the temperature of the processed chip 43 a subjected to swelling and softening treatment to 30 ° C. or more and less than 100 ° C .; A composting chip comprising a treated chip 43b under the temperature range added with a microbial cell for microbial decomposition of the treated chip and a nutrient material such as nitrogen, phosphorus and potassium for enhancing the microbial activity of the microbial cell. And a composting yard 45 which is a curing means for curing 44.

  The processing device 4 ′ swells and softens the primary crushing tip 3, that is, places the primary crushing tip 3 under high temperature and high pressure, and then rapidly depressurizes the primary crushing tip 3. ) Is going to be destroyed.

  What is necessary is just to comprise processing apparatus 4 'arbitrarily selecting from a well-known apparatus irrespective of the temperature at the time of discharge | emission.

  The belt conveyor 42 appropriately determines specifications such as the number of units, the length of the machine, and the height of the slope so that the processed chip 43a becomes a processed chip 43b due to the temperature cooling due to air cooling during transportation or dropping.

  The cells can be appropriately selected according to the temperature of the processed chip 43b discharged from the belt conveyor 42. If the temperature is 30 ° C to 50 ° C, the mesophilic bacteria can be selected at 50 ° C to 65 ° C. If there are, thermophilic bacteria can be employed.

  In order to implement the wood composting method according to the present embodiment using the composting system 41 described above, first, a tree that has fallen due to slope collapse is used as a raw material, and the raw material is formed into chips by the crusher 2. The primary crushing chip 3 that is a wood chip is produced by crushing.

  Next, the primary crushing chip 3 is placed on the belt conveyor 8 and then charged into the processing device via the charging port of the processing device 4 '.

  Next, the primary crushing chip 3 is swelled and softened by the processing device 4 ′.

  Next, the temperature of the processed chip 43a discharged from the processing device 4 ′ is lowered to 30 ° C. or higher and lower than 100 ° C. by the belt conveyor 42, and this is used as the processed chip 43b.

  Next, a fungus body for microbial decomposition of the treated chip and a nutrient material for increasing the microbial activity of the fungus body are added to the treated chip 43b to form a composting chip 44. Place. In addition, since it is the same as that of 1st Embodiment about a microbial cell and a nutrient material, the description is abbreviate | omitted here.

  Next, the composting chip 44 is cured and composted in the composting yard 45.

  In composting, the composting chips 44 are stacked so as to have a trapezoidal cross section, and the waterproof sheet 10 is laid on the surface to prevent an excessive increase in moisture content due to rainwater infiltration. As necessary, the composting is appropriately turned over so that the composting progresses uniformly.

  In this way, the fungus body added to the composting chip 44 is placed in a temperature environment of, for example, 30 ° C. to 40 ° C. from the beginning of curing, as described with reference to FIG. It is quickly decomposed by the microbial activity of the cells, and the temperature rises to 60 ° C. in one week from the start of curing. Furthermore, by turning back at this time, composting is completed after 3 weeks.

  As described above, according to the wood composting method and the composting system 41 according to the present embodiment, the bacterial cells are used from the beginning in the form in which the thermal energy generated by the swelling and softening treatment by the processing device 4 ′ is used. Because it is in a temperature environment suitable for microbial activity, the period required for composting of the treated chip 43a can be greatly shortened without providing a separate heat source, and the thermal energy generated by the swelling and softening process can be composted. Because it can be converted into energy for use in the environment, the environmental burden can be reduced on a global scale.

  In addition, the period for composting is greatly shortened, so that trees that have fallen due to slope collapse can be transported to treatment facilities as before, or they can be damaged without securing a large composting yard. It becomes possible to compost at a place, and thus the above-mentioned tree can be effectively used in a form excellent in economic efficiency.

  Moreover, according to the composting method and composting system 41 of the wood according to the present embodiment, the temperature of the processed chip 43a subjected to the swelling and softening processing by the processing device 4 ′ is set to 30 ° C. or more and less than 100 ° C. by the belt conveyor 42. Since the processed chip 43b is lowered, the compost is processed even if the temperature of the processed product discharged from the discharge port of the processing device 4 ′ is set to 150 ° C. to 300 ° C., for example. It is possible to change the temperature to a temperature suitable for crystallization, in other words, a temperature suitable for the environment of microorganisms that are relatively easy to use, such as mesophilic bacteria and thermophilic bacteria. It becomes possible to select.

  In the present embodiment, wood chips are produced by first crushing trees that have fallen due to slope failure, but the wood from which the wood chips are produced is not limited to such trees and has been cut down. It is possible to arbitrarily select from various timbers such as timber made from trees and damaged trees as well as thinned timber and waste wood.

  Further, in this embodiment, the swelling and softening process is performed as secondary crushing, but it is arbitrary how the normal crushing process is performed prior to the swelling and softening process. For example, the normal crushing process is repeatedly performed. Later, the softening treatment may be performed as tertiary crushing.

  In the present embodiment, no particular mention has been made of compost obtained by composting the composting chip 44, but typically, it can be used as a vegetation base for slope planting.

  FIG. 5 is a schematic view showing a slope greening system 51 for performing slope greening using the compost obtained in the above embodiment, and the slope greening system is the above-described wood composting. In addition to the configuration of the system 41, the system includes a spraying machine 53 that stirs and mixes the compost produced in the composting yard 45 together with other vegetation bases to produce a vegetation base slurry, and a vegetation base manufactured by the spraying machine. The material slurry can be sprayed onto the slope 32 via the spray hose 54 connected to the spray machine 53 and the spray nozzle 55 attached to the tip thereof.

  In order to perform slope planting using the slope planting system 51, a tree that has fallen due to the collapse of the slope 32 is used as a raw material, and the raw material is crushed into chips by the crusher 2 according to the same procedure as described above. Then, the primary crushing chip 3 which is a wood chip is produced, and the primary crushing chip is subjected to expansion / softening processing by the processing device 4 ′, and the temperature of the processed chip 43 a after completion of the expansion / softening processing is set to 30 by the belt conveyor 42. The processed chip 43b is reduced to a temperature of not lower than 100 ° C. and lower than 100 ° C., and the treated chip 43b is composted by adding microbial cells capable of microbial decomposition of the treated chips and nutrient materials for increasing the microbial activity of the microbial cells. After the compost is produced by placing the composting chip on the composting yard 45 and curing it, the compost is sprayed together with other vegetation base materials such as plant seeds, water, and adhesive. Stirring with machine 53 The vegetation base material slurry is combined to produce the vegetation base material slurry, and the vegetation base material slurry is pumped to the vicinity of the slope surface 32 through the spray hose 54 and then passed through the spray nozzle 55 attached to the tip of the spray hose 54. By spraying on the slope 32, a vegetation base 36 is laminated on the slope.

  In this way, since the composting method of the above-described embodiment can greatly shorten the composting period, the trees that have fallen due to the collapse of the slope 32 are transported to a treatment facility or a large composting yard is created. Even if it is not secured, composting is quickly performed in the affected area, and as a result, a series of processes such as processing of wood chips, swelling and softening, composting, preparation of vegetation base slurry and slope spraying are performed near the affected area In this way, it becomes possible to proceed intensively, and thus it is possible to proceed with restoration of the damaged part by slope planting and reuse of the damaged tree in an economical manner.

  In addition, if a clogging prevention material is added to the vegetation base material slurry before the spraying step, the sprayer 53, the spray hose 54 connected thereto, and the spray nozzle 55 attached to the tip of the sprayer 53 are also provided. Thus, the clogging of the vegetation base slurry can be prevented.

  The clogging prevention material can be composed of, for example, activated carbon.

3 Primary crushing chips (wood chips)
4,4 'processing device 5,43a, 43b processed chip 6,44 composting chip 41 wood composting system 42 belt conveyor (temperature lowering means)
45 Composting yard (curing means)
51 Slope Greening System 53 Spraying Machine 54 Spray Hose 55 Spray Nozzle

Claims (6)

Wood chips to be composted are swelled and softened by a processing device, and discharged from the processing device so that the thermal energy generated by the swelling and softening process can be used and the temperature environment is suitable for microbial activity. Nutritional material for reducing the temperature of the treated chip to 30 ° C. or more and less than 100 ° C., microbially decomposing the treated chip into the treated chip within the temperature range, and enhancing the microbial activity of the fungus body A composting method for wood characterized in that a composting chip is prepared by adding and mixing and curing the composting chip. Composting process according to claim 1 wherein the timber for making the wood chips by crushing the affected trees. Suitable for microbial activity so that the thermal energy generated in the swelling and softening treatment can be used for the processing device for swelling and softening the wood chips to be composted, and the temperature of the treated chips discharged from the processing device Temperature lowering means for lowering the temperature to 30 ° C. or higher and lower than 100 ° C. so as to become a temperature environment, the cells that microbially decompose the treated chips to the treated chips that are under the temperature range, and the microbial activity of the cells is increased A composting system for wood, comprising: a curing means for curing a composting chip to which a nutritional material is added. A compost produced by the composting method according to claim 1 or claim 2 is stirred and mixed with another vegetation base material to produce a vegetation base material slurry, and the vegetation base material slurry is sprayed on a slope. The slope greening method to do. The slope greening method of Claim 4 which adds a clogging prevention material to the said vegetation base material slurry before the said spraying process. Suitable for microbial activity so that the thermal energy generated in the swelling and softening treatment can be used for the processing device for swelling and softening the wood chips to be composted, and the temperature of the treated chips discharged from the processing device Temperature lowering means for lowering the temperature to 30 ° C. or higher and lower than 100 ° C. so as to become a temperature environment, the cells that microbially decompose the treated chips to the treated chips that are under the temperature range, and the microbial activity of the cells is increased A curing means for curing a composting chip to which a nutrient material is added, and a spraying machine for stirring and mixing the compost produced by the curing means together with another vegetation base material to produce a vegetation base slurry The vegetation base material slurry produced by the spraying machine can be sprayed to the slope via the spraying hose connected to the spraying machine and the spraying nozzle attached to the tip of the spraying hose. Slope greening system characterized by being configured so.

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