JP2008120890A - Method for producing biomass fuel, biomass fuel and method for utilizing used medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a biomass fuel to realize the effective utilization of a used medium and the cost reduction in mushroom culture. <P>SOLUTION: A used medium 301 for mushroom culture is dried and formed in the form of pellets, granules, tablets or flakes to obtain the biomass fuel 101. The used medium 301 is preferably dried to a water-content of ≤13% before forming to either one of the above forms. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a biomass fuel production method and a biomass fuel using a spent culture medium for straw cultivation, and a spent culture medium utilization method utilizing a spent culture medium.

  Conventionally, a bottle cultivation method is known as a cultivation method for enoki mushrooms and shimeji mushrooms. In this bottle cultivation method, a culture bottle mainly made of plant-derived raw materials such as sawdust and rice bran is filled in a cultivation bottle, and after the medium is sterilized, inoculum is planted to form a fungus bed. On the other hand, in this bottle cultivation method, it is generally necessary to replace the culture medium with a new one every time the persimmon is harvested once, so that a large amount of spent culture medium is generated. In this case, since this used culture medium contains components useful for agricultural crops, it has been conventionally reused as a soil conditioner and fertilizer. However, since the spent medium contains 60% or more of water at the time of collection from the cultivation bottle, it is difficult to spray it on the field as it is. For this reason, many of the used culture media which generate | occur | produce in large quantities are piled up around a farm field or a straw cultivation facility, without being reused, and the bad smell generate | occur | produced from this used spent culture medium is a problem. In addition, fertilizers have been developed in which the spent medium has been processed relatively easily, but the supply of this type of fertilizer tends to be excessive with respect to demand, and all of the spent medium has not been used effectively. is the current situation.

  On the other hand, in the bottle cultivation method, it is necessary to sterilize the medium filled in the cultivation bottle as described above, and a large amount of fossil fuels, mainly A heavy oil, light oil and kerosene, are required to operate the facility for sterilization. Is consumed. Also, in the bottle cultivation method, it is necessary to store the cultivation bottle planted with the inoculum in a growth room maintained at a predetermined temperature for a certain period of time to grow straw, so a large amount of fossil fuel is also used to heat the growth room. Consuming. For this reason, there is a problem that the running cost increases with the soaring of these fuels, and the management of the grape grower is under pressure. As a technique capable of solving such a problem, a mushroom production method (hereinafter also simply referred to as “production method”) disclosed in Japanese Patent Application Laid-Open No. 2002-119134 is known. In this production method, high-pressure steam is generated using heat generated in an incineration facility of an industrial plant, this high-pressure steam is supplied to a straw cultivation (production) facility by piping, and the supplied high-pressure steam is a medium in the straw cultivation facility. It is used for sterilization of (cultivation base) and heating of the growing room. Moreover, in this production method, the used culture medium (cultivation base after use) discharged from the straw cultivation facility is dried, and the dried used culture medium is supplied as fuel to the incineration facility. For this reason, in this production method, on the incineration facility side, the spent medium that is generated in large quantities is stably supplied as fuel, so that heat energy can be stably supplied. On the side, since it is possible to stably secure inexpensive thermal energy, it is possible to effectively use a large amount of spent medium and improve the management of straw growers.

JP 2002-119134 A (page 4, FIG. 1)

  However, the conventional production method has the following problems. That is, this production method is a method for a large-scale facility, and the above-described effects can be exhibited only when it is introduced into a large-scale facility. However, many of the cultivation facilities are small-scale facilities that are individually managed or small-scaled, and it is extremely difficult to introduce the production method as described above. For this reason, even if such a production method is introduced into some large-scale facilities, it is still difficult to promote effective use of a large amount of spent medium. In the above production method, the dried spent medium is used as fuel as it is. In this case, the spent medium that has just been dried is in the form of a powder, and in order to continuously burn such powder, it is necessary to add heat from the outside or add auxiliary fuel. is there. For this reason, even if a small incinerator is developed for a small-scale plantation facility by applying the above production method, the incinerator has a special structure and the initial cost is increased. It becomes difficult.

  The present invention has been made in view of such problems, and provides a biomass fuel production method, a biomass fuel, and a spent medium utilization method capable of realizing both effective use of a spent medium and cost reduction in straw cultivation. The main purpose.

  In order to achieve the above object, the method for producing biomass fuel according to claim 1, wherein the spent medium of the straw cultivation medium used for straw cultivation is dried, and the dried spent medium is formed into pellets, granules, tablets and flakes. The biomass fuel is produced by molding into any one of the shapes.

  The biomass fuel production method according to claim 2 is the biomass fuel production method according to claim 1, wherein the spent medium is dried so that a moisture content before forming into any one of the shapes is 13% or less. The method for producing biomass fuel according to claim 1.

  A biomass fuel production method according to claim 3 is the biomass fuel production method according to claim 1 or 2, wherein the dried spent medium is formed into a pellet using a pellet machine.

  Furthermore, the biomass fuel manufacturing method according to claim 4 uses the spent culture medium of the straw cultivation medium that mainly uses rice husk as the biomass fuel manufacturing method according to any one of claims 1 to 3.

  Moreover, the biomass fuel of Claim 5 shape | molds the spent medium of the culture medium for straw cultivation used for straw cultivation in any shape of a pellet form, a granular form, a tablet form, and flake form.

  Moreover, the spent medium utilization method of Claim 6 collect | recovers the used culture medium of the said culture medium for persimmon cultivation used when the culture medium for persimmon cultivation is delivered to a persimmon cultivation facility, After the culture medium is dried, the biomass fuel is produced by molding into a pellet, granule, tablet, or flake shape, and the biomass is used as fuel for the heat source for the straw cultivation facility that uses the heat source for straw cultivation. Supply and use fuel.

  According to the method for producing biomass fuel according to claim 1 and the biomass fuel according to claim 5, the dried spent culture medium is formed into any one of pellets, granules, tablets and flakes to produce the biomass fuel. By producing a biomass fuel that can be suitably used as a fuel for a general combustion apparatus at low cost, it is possible to provide biomass fuel to users at a low price. it can. For this reason, by using biomass fuel as the fuel of the heat source used for straw cultivation, the fuel cost can be kept sufficiently low, and as a result, the cultivation cost can be surely reduced. Further, by expanding the use of such biomass fuel, it is possible to reliably promote the effective use of the spent medium that has not been used so far.

  According to the method for producing biomass fuel according to claim 2, the spent medium is dried so that the moisture content before forming into any one of pellets, granules, tablets and flakes is 13% or less. Because it can be formed into pellets in a state where the spent medium is sufficiently dried, even if it is difficult to dry after being formed into pellets, the dry state necessary for burning biomass fuel To be sure to maintain.

  In addition, according to the method for producing biomass fuel according to claim 3, by forming the spent medium into a pellet using a pellet machine, the moisture content of the spent medium can be sufficiently reduced by the heat generated during molding. Therefore, a biomass fuel with a good dry state can be produced.

  Furthermore, according to the method for producing biomass fuel according to claim 4, since the biomass fuel is produced by using the spent medium of the cultivation medium for rice husk that uses rice husk as the main material, Of biomass fuel can be produced.

  Moreover, according to the spent medium utilization method of Claim 6, when the culture medium for straw cultivation is delivered to the straw cultivation facility, the spent culture medium is collected, and the collected spent culture medium is pelletized, granular, tablet-shaped and By manufacturing biomass fuel by molding it into any shape of flaky shape, supplying biomass fuel as fuel of the heat source to the straw cultivation facility that uses the heat source for straw cultivation, Since the delivery flight used for delivery can be used for collecting the spent medium, the delivery cost can be further reduced. In addition, for example, both the biomass fuel production facility and the straw cultivation medium production facility are operated by the same manufacturer, so that both the biomass fuel and the straw cultivation medium can be delivered by the same delivery flight. Delivery costs can be further reduced. In addition, by operating both manufacturing facilities by the same manufacturer, it is possible to share devices that share the same functions at both manufacturing facilities, and as a result, capital investment can be reduced, resulting in biomass fuel and straw cultivation. The production cost of the culture medium can be kept low.

  Hereinafter, the best mode of a biomass fuel production method, a biomass fuel, and a spent medium utilization method according to the present invention will be described with reference to the accompanying drawings.

  First, the configuration of the biomass fuel production facility 1 (hereinafter also referred to as “fuel production facility 1”) shown in FIG. 1 will be described. The fuel production facility 1 uses a biomass fuel 101 (see FIGS. 8 and 9) according to a biomass fuel production process 50 (see FIG. 2; hereinafter, also referred to as “fuel production process 50”) as an example of a biomass fuel production method according to the present invention. It is configured to be manufacturable. Specifically, the fuel production facility 1 includes a raw material tank 11, a primary drying device 12, a service tank 13, a pellet forming device (pellet machine) 14, a secondary drying device 15, a product tank 16, and a weighing / filling device 17. Configured. In this case, a belt conveyor and a screw conveyor (both not shown) for conveying raw materials and products (biomass fuel 101) are installed between the devices and tanks constituting the fuel manufacturing facility 1.

  As shown in FIG. 1, the raw material tank 11 stores a used medium 301 as a raw material used for manufacturing the biomass fuel 101. In this case, the raw material tank 11 has a sealed structure in order to prevent the malodor generated from the used culture medium 301 from spreading to the surroundings. The primary drying apparatus 12 includes, for example, a press-type dehydrator and a blower, and the moisture of the used medium 301 conveyed from the raw material tank 11 is about 12% (an example of 13% or less in the present invention). To lower. The service tank 13 stores the used medium 301 that has been primarily dried by the primary drying device 12.

  The pellet forming apparatus 14 forms the used medium 301 stored in the service tank 13 into a pellet shape. The secondary drying device 15 includes, for example, a blower, and dries the spent medium 301 formed into a pellet shape by the pellet forming device 14. The product tank 16 stores a spent medium 301 (ie, biomass fuel 101) that has been subjected to secondary drying and cooling. The weighing / filling device 17 measures a predetermined weight of the biomass fuel 101 and fills the flexible container 401 (see FIG. 8) or the packaging bag 402 (see FIG. 9).

  On the other hand, the biomass fuel 101 is a fuel produced by the fuel production facility 1 using the spent medium 301 as a raw material, and is in any one of pellets, granules, tablets, and flakes (as an example) The pellet is shaped into a pellet (columnar shape) having a diameter of about 6 mm and a length of about 10 to 15 mm. In this case, the biomass fuel 101 is formed into pellets between the particles, unlike the powdery fuel, which cannot be sustainedly burned unless heat is added from the outside or auxiliary fuel is added. Since moderate space exists and self-combustion is possible continuously, it can be suitably used as fuel for the combustion device 34a in the straw cultivation facility 3 described later.

  Here, “biomass” generally refers to a resource that can be used as an energy source from a constituent material constituting an existing living organism, and excludes fossil resources such as oil. “Biomass fuel” refers to fuel using this biomass. In recent years, in addition to growing interest in the effective use of resources, this biomass fuel is mainly petroleum, in the context of rising oil prices. It is in the limelight as a fuel that replaces fossil fuels or supplements fossil fuels.

  Next, the configuration of the culture medium production facility 2 shown in FIG. 3 will be described. The culture medium production facility 2 is a facility for producing a straw cultivation medium 201 (see FIGS. 8 and 9; hereinafter, also simply referred to as “medium 201”) used for anther cultivation in the present invention, and is a raw material tank 21a˜ 21e (hereinafter also referred to as “raw material tank 21” when not distinguished), weighing / feeding devices 22a to 22e (hereinafter also referred to as “weighing / feeding device 22” when not distinguished), mixing device 23, service tank 24, sterilization device 25, a pellet forming device (pellet machine) 26, a drying device 27, a product tank 28, and a weighing / filling device 29. In this case, a belt conveyor or a screw conveyor (both not shown) for conveying raw materials, intermediate products and the like are installed between the apparatuses and tanks constituting the culture medium production facility 2.

  The raw material tanks 21a to 21e are configured to be capable of storing a plurality of types (for example, five types) of raw materials for producing the culture medium 201, respectively. In this case, for example, rice husk 211 as a main raw material serving as a base material for growing the mycelium of straw is stored in the raw material tank 21a. The raw material tanks 21b to 21e store rice bran 212, bean hull 213, bran 44, and beet 215 as auxiliary raw materials for supplying nutrients to the mycelium of straw. The weighing / feeding devices 22a to 22e respectively measure the raw materials conveyed from the raw material tanks 21a to 21e by a predetermined weight. The mixing device 23 mixes each raw material weighed by each weighing / feeding device 22 (hereinafter, a mixture of the raw materials is also referred to as “mixed raw material”).

  The service tank 24 stores the mixed raw material mixed by the mixing device 23. The sterilizer 25 includes a high-temperature steam generator, a steam sprayer, and a stirrer, and sterilizes the raw material by stirring the sprayed high-temperature steam to the mixed raw material. The pellet forming apparatus 26 forms the sterilized mixed raw material into a pellet shape. The drying device 27 dries the mixed raw material formed into pellets. The product tank 28 stores the dried pellet-shaped mixed raw material (that is, the medium 201). The weighing / filling device 29 measures a predetermined weight of the medium 201 and fills the flexible container 401 (see FIG. 8) or the packaging bag 402 (see FIG. 9).

  Next, the structure of the straw cultivation facility 3 shown in FIG. 5 is demonstrated. The straw cultivation facility 3 is a facility that performs straw cultivation in the present invention, and includes a stirring device 31, a filling device 32, a sterilization chamber 33, a boiler 34, a planting device 35, a growing chamber 36, and a scraping device 37. Yes. The stirrer 31 adjusts the medium 201 to be in a state of moderate softness and proper water content by stirring while adding water to the medium 201. The filling device 32 fills the cultivation bottle with the culture medium 201. The sterilization chamber 33 is configured to be able to store the cultivation bin filled with the medium 201 and maintain the room in a high temperature and high pressure state with high-temperature steam supplied from the boiler 34, whereby the medium 201 in the accommodated cultivation bin is stored. It is configured to be sterilizable. The boiler 34 includes a combustion device 34 a and supplies high-temperature steam generated by heat generated from the combustion device 34 a to the sterilization chamber 32. In this case, as the combustion device 34a, a general combustion device suitable for the combustion of the solid fuel including the biomass fuel 101 can be used, and it is not necessary to have a special structure for burning the powdery fuel. . The planting device 35 plants the mycelia on the sterilized medium 201. The growth chamber 36 is configured to accommodate a cultivation bottle in which gonococcal hyphae is planted in the culture medium 201, and is configured to be able to maintain the room at a predetermined temperature using steam supplied from the boiler 34. The scraping device 37 is used when scraping the used medium 301 after harvesting from the cultivation bottle.

  Next, a specific example of the spent medium utilization method according to the present invention and a specific example of a biomass fuel production method using the fuel production facility 1 will be described with reference to the drawings. In the following example, a biomass fuel manufacturer that manufactures the biomass fuel 101 using the fuel manufacturing facility 1 and a culture medium manufacturer that manufactures the culture medium 201 using the culture medium manufacturing facility 2 (hereinafter referred to as “ It is assumed that both manufacturing facilities 1 and 2 are installed in the same manufacturing factory 4.

  In this spent medium utilization method, the manufacturer uses the medium production facility 2 to produce the biomass fuel 101 according to the medium production step 60 shown in FIG. In this culture medium production process 60, first, rice husk 211 as the main raw material, and rice bran 212, bean hull 213, bran 214 and beet 215 as the auxiliary raw materials are respectively stored in the respective raw material tanks 21a to 21e (raw material storage step 61). . Next, the weighing / feeding devices 22a to 22e weigh each of the auxiliary materials conveyed from the raw material tanks 21b to 21e by a predetermined weight and feed them into the mixing device 23 (raw material charging step 62). In this case, the weight of each raw material weighed by the weighing / feeding devices 22a to 22e is, for example, 50% by weight of the composition ratio of rice husk 211, rice bran 212, bean hull 213, bran 214 and beet 215 in the mixed raw material. 20% by weight, 10% by weight, 10% by weight and 10% by weight.

  Next, each raw material is mixed using the mixing apparatus 23 (mixing process 63). Next, the mixed raw material mixed by the mixing device 23 is stored in the service tank 24. Subsequently, the mixed raw material is moved from the service tank 24 to the sterilizer 25. Next, the sterilizer 25 sterilizes the mixed raw material by stirring the mixed raw material while spraying high-temperature steam on the mixed raw material (sterilization step 64). Subsequently, the mixed raw material that has been sterilized is put into the pellet forming apparatus 26. At this time, the pellet forming apparatus 26 forms the mixed raw material into a pellet shape having a diameter of about 6 mm and a length of about 10 to 15 mm (pellet forming step 65).

  Next, the mixed raw material formed into a pellet is moved to the drying device 27, and the mixed raw material is dried until the drying device 27 has a moisture content of 12% to 13% (drying step 66). Thereby, the pellet-shaped culture medium 201 is completed. Subsequently, the medium 201 that has been dried is stored in the product tank 18. Next, using the weighing / filling device 19, the medium 201 stored in the product tank 18 is weighed, for example, by 500 kg, and filled into the large flexible container 401 shown in FIG. 8 (weighing / filling). Step 67). In this case, instead of the flexible container 401, for example, 15 kg of the culture medium 201 may be filled using a packaging bag 402 shown in FIG. Thus, the medium production process 60 is completed.

  Moreover, in this used culture medium utilization method, a cocoon grower (persimmon producer) grows a cocoon according to the cocoon cultivation process 70 shown in FIG. In this straw cultivation process 70, first, the culture medium 201 transported from the culture medium manufacturing facility 2 (manufacturing factory 4) in a state of being filled in the flexible container 401 or the packaging bag 402 is put into the stirring device 31, and water is added. While stirring, the water content of the medium 201 is adjusted to about 64% to 65% (stirring step 71). Next, the culture medium 201 that has been stirred is filled into the cultivation bottle using the filling device 32 (medium filling step 72). In this case, in this medium 201, rice husk 211 as a base material for growing the mycelium of cocoon, rice bran 212, bean hull 213, bran 214 and beet 215 as additives for supplying nutrients to the mycelium Premixed. Therefore, the work efficiency in straw cultivation can be improved by the amount that the step of adding additives in the straw cultivation facility 3 can be omitted.

  Next, the cultivation bottle filled with the medium 201 is accommodated in the sterilization chamber 33. At this time, in the sterilization chamber 33, the medium 201 in the accommodated cultivation bottle is sterilized by maintaining the chamber in a high temperature and high pressure state by the high temperature steam supplied from the boiler 34 (sterilization step 73). In this case, in this straw cultivation facility 3, biomass fuel 101 is used as the fuel of the combustion device 34a in the boiler 34. Subsequently, gonococcal hyphae are planted in the sterilized medium 201 using the planting device 35 (planting process 74). In this case, since the sterilization process is performed when the culture medium 201 is manufactured, it is possible to sufficiently shorten the sterilization time after the culture bottle is filled with the culture medium 201.

  Next, the cultivation bottle in which the gonococcal hyphae is planted in the medium 201 is accommodated in the growing chamber 36 and grown in a state where the chamber is maintained at a predetermined temperature (growing step 75). During this time, a fungus scraping step for promoting germination (emergence) is performed. Subsequently, the grown straw (fruit body) is harvested and packaged for shipping (harvesting / shipping process 76). Next, the spent medium 301 is scraped out from the cultivation bin that has been harvested, and accumulated in a predetermined accumulation location. (Medium scraping step 77). In this case, for example, a bad odor is generated by accumulating the flexible container 401 used for delivery of the culture medium 201 or the collection flexible container 401 distributed in advance by the manufacturer in a state where the spent culture medium 301 is filled. In addition, it is possible to improve the efficiency of collecting the spent medium 301 by the manufacturer described later. Thus, the straw cultivation process 70 is completed.

  On the other hand, as shown in FIG. 7, when the manufacturer delivers the medium 201 to the straw cultivation facility 3 in accordance with an order from the straw grower, the spent medium 301 generated along with the straw cultivation is the straw cultivation facility. 3, the manufacturer collects the spent medium 301 and takes it back to the manufacturing factory 4. In this case, the manufacturer uses the fuel manufacturing facility 1 to manufacture the biomass fuel 101 using the spent medium 301 according to the fuel manufacturing process 50 shown in FIG. In the fuel production process 50, first, the spent medium 301 is stored in the raw material tank 11 (raw material storage process 51). In this case, the spent medium 301 contains 60% to 70% of water at the time of charging because the medium collected from the straw cultivation facility is input as it is. For this reason, when stored in the raw material tank 11 for a long time, it may ferment. However, since the raw material tank 11 has a sealed structure as described above, even if the used medium 301 is fermented in the raw material tank 11. However, the spread of malodor to the outside is surely prevented.

  Next, the spent medium 301 is transferred from the raw material tank 11 to the primary drying device 12. At this time, the primary drying device 12 performs dehydration by a dehydrator and drying by a blower, thereby reducing the water content of the used medium 301 to about 12% (primary drying step 52). Subsequently, the used medium 301 that has undergone primary drying is stored in the service tank 13. Next, the spent medium 301 is transferred from the service tank 13 to the pellet forming apparatus 14. At this time, the pellet forming apparatus 14 forms the used culture medium 301 into a pellet having a diameter of about 6 mm and a length of about 10 to 15 mm (pellet forming step 53).

  Subsequently, the pellet-shaped spent medium 301 is transferred to the secondary drying device 15. At this time, the transferred spent culture medium 301 is dried and cooled by blowing air from the secondary drying device 15 to adjust the moisture content to 10% (secondary drying step 54). Thereby, the biomass fuel 101 is completed. Subsequently, the dried biomass fuel 101 is stored in the product tank 16. Next, using the weighing / filling device 17, the biomass fuel 101 stored in the product tank 16 is weighed by 500 kg (or 15 kg) and filled into the flexible container 401 (or packaging bag 402) (weighing / filling step). 55).

  In this case, as shown in FIG. 7, the biomass fuel 101 manufactured as described above is delivered by the manufacturer to the straw cultivation facility 3 in accordance with an order from the straw grower. Here, in this spent culture medium utilization method, since both the fuel production facility 1 and the culture medium production facility 2 are operated by the same manufacturer, both the biomass fuel 101 and the culture medium 201 are received in accordance with an order from the grape grower. The delivery cost can be reduced by delivering the same by the same delivery flight. Moreover, as described above, when the manufacturer delivers the biomass fuel 101 and the culture medium 201, the used culture medium 301 is collected from the straw cultivation facility 3, whereby the delivery cost can be further reduced.

  On the other hand, as described above, the biomass fuel 101 can be suitably used as a fuel for a general combustion apparatus 34a suitable for solid fuel combustion by being formed into pellets. In addition, since the biomass fuel 101 is manufactured by a relatively simple manufacturing process as described above using the spent medium 301 having a very low commercial value, the manufacturing cost can be sufficiently reduced. As a result, it is possible to provide the user with a low price. For this reason, as a grower who uses a heat source for straw cultivation, by using the biomass fuel 101 as a fuel for the heat source, the fuel cost is sufficiently low without introducing a special combustion device at a great initial cost. Therefore, the cultivation cost can be surely reduced. Further, by expanding the use of such biomass fuel 101, it becomes possible to reliably promote the effective use of the used culture medium 301 that has not been used so far.

  Further, in this used medium utilization method, the same manufacturer operates the fuel production facility 1 and the medium production facility 2 to produce both the biomass fuel 101 and the medium 201. For this reason, the apparatuses (for example, the pellet forming apparatus 14 of the fuel manufacturing facility 1 and the pellet forming apparatus 26 of the medium manufacturing facility 2) having the same functions in both the manufacturing facilities 1 and 2 are shared, that is, one apparatus. Can be used for both the production of the biomass fuel 101 and the production of the culture medium 201. For this reason, as a result of being able to reduce the capital investment correspondingly, it becomes possible to further reduce the manufacturing cost of the biomass fuel 101 and the culture medium 201, and further promote the reduction of the cultivation cost and the effective use of the spent culture medium 301. Is possible.

  Thus, according to this biomass fuel production method and biomass fuel 101, the dried spent medium 301 is formed into any one of pellets, granules, tablets, and flakes (as an example, pellets). By producing the biomass fuel 101, the biomass fuel 101 that can be suitably used as the fuel for the general combustion device 34a can be produced at a low cost. Can be offered at a low price. For this reason, as a result of using the biomass fuel 101 as the fuel of the heat source used for straw cultivation, the fuel cost can be suppressed sufficiently low, so that the cultivation cost can be surely reduced. Further, by expanding the use of such biomass fuel 101, it is possible to reliably promote the effective use of the spent medium 301 that has not been used so far.

  Moreover, according to this biomass fuel manufacturing method, in a state where the used culture medium 301 is sufficiently dried by drying the used culture medium 301 so that the moisture content before being formed into pellets is 13% or less. Since it can be formed into a pellet, the biomass fuel 101 can be reliably maintained in a dry state necessary for combustion even when it is difficult to dry after being formed into a pellet.

  Moreover, according to this biomass fuel manufacturing method, the used culture medium 301 is formed into pellets using the pellet forming apparatus (pellet machine) 14, thereby sufficiently increasing the moisture content of the used culture medium 301 due to heat generated during the formation. Since it can reduce, the biomass fuel 101 with a favorable dry state can be manufactured.

  Moreover, according to this biomass fuel manufacturing method, since the biomass fuel 101 is manufactured using the spent medium 301 of the medium 201 that mainly uses the rice husk 211, the burning calories of the rice husk 211 is high. The fuel 101 can be manufactured.

  Moreover, according to this used culture medium utilization method, when the culture medium 201 is delivered to the straw cultivation facility 3, the spent culture medium 301 is collected, and the collected spent culture medium 301 is in the form of pellets, granules, tablets, and flakes. By producing biomass fuel 101 by molding it into any shape (as an example of pellets), supplying biomass fuel 101 as fuel for the heat source to the straw cultivation facility 3 that uses the heat source for straw cultivation Since the delivery flight used for delivering the medium 201 can be used for collecting the used medium 301, the delivery cost can be further reduced. Further, for example, both the fuel manufacturing facility 1 and the culture medium manufacturing facility 2 are operated by the same manufacturer, so that both the biomass fuel 101 and the culture medium 201 can be delivered by the same delivery flight, thereby further reducing the delivery cost. can do. In addition, since the same manufacturer operates both the manufacturing facilities 1 and 2, it is possible to share devices having the same function in both the manufacturing facilities 1 and 2, thereby reducing the capital investment accordingly. Moreover, the manufacturing cost of the biomass fuel 101 and the culture medium 201 can be kept low.

  In addition, this invention is not limited to said structure. For example, although the example which shape | molds the used culture medium 301 in a pellet form and manufactured the biomass fuel 101 was mentioned above, it is not limited to a pellet form, The used culture medium 301 is shape | molded in granular, a tablet form, and flake form. Biomass fuel can also be produced. Moreover, although it described above about the example which manufactures the biomass fuel 101 using the used culture medium 301 of the culture medium 201 which uses the chaff 211 as a main raw material, the used culture medium 301 of the culture medium which uses various raw materials, such as sawdust, as the main raw material is used. Of course, it can be used.

1 is a block diagram showing a configuration of a biomass fuel production facility 1. FIG. It is process drawing of the biomass fuel manufacturing process 50. 2 is a block diagram showing a configuration of a medium production facility 2. FIG. 6 is a process diagram of a medium production process 60. FIG. It is a block diagram which shows the structure of the straw cultivation facility. It is process drawing of the straw cultivation process 70. It is explanatory drawing for demonstrating a utilization method. It is a perspective view in the state where a part of flexible container 401 filled with biomass fuel 101 (or culture medium 201) was cut away. It is a perspective view in the state where a part of packaging bag 402 filled with biomass fuel 101 (or culture medium 201) was cut out.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fuel production facility 3 Firewood cultivation facility 14 Pellet molding apparatus 34a Combustion apparatus 50 Fuel manufacturing process 101 Biomass fuel 201 Medium 211 Rice husk 301 Used medium

Claims (6)

  Biomass fuel produced by drying the spent medium of the cultivation medium used for straw cultivation and forming the dried spent medium into a pellet, granule, tablet or flake shape Production method.   The method for producing biomass fuel according to claim 1, wherein the spent medium is dried so that the moisture content before forming into any one of the shapes is 13% or less.   The biomass fuel manufacturing method according to claim 1 or 2, wherein the dried spent medium is formed into a pellet using a pellet machine.   The method for producing biomass fuel according to any one of claims 1 to 3, wherein a spent culture medium of the straw cultivation medium mainly comprising rice husk is used.   A biomass fuel that is formed by molding a spent medium of a straw cultivation medium used for straw cultivation into a pellet, granule, tablet, or flake shape.   The spent medium of the persimmon cultivation medium used for persimmon cultivation when the persimmon cultivation medium is delivered to the persimmon cultivation facility is collected, and the collected spent medium is dried, then pelletized, granular, tablet-like and flakes A spent medium utilization method in which biomass fuel is produced by molding into any one of the shapes, and the biomass fuel is supplied and used as the fuel of the heat source for the straw cultivation facility that uses a heat source for straw cultivation.

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