Waste treatment plant and waste treatment method

Abstract

To provide a waste treatment plant and a waste treatment method capable of simplifying treatment steps to suppress energy costs.SOLUTION: A waste treatment plant is configured to: mix a waste 1 with a bulk density adjusting material 2 that increases volume and a microorganism adhering material 3 attached with aerobic microorganisms, and apply a load to generate a bulk density-adjusted aerobic fermentation treatment object material 100; subject the aerobic fermentation treatment object material 100 to aerobic fermentation and drying; remove noncombustible matters 230 and vinyl chloride 240 from an aerobic fermentation dried material 200 made from the aerobic fermentation treatment object material through the aerobic fermentation and the drying, and sort out a solid fuel raw material 210 and / or a compost raw material 220 in a post-treatment facility provided in the waste treatment plant. In a bulk density adjustment operation, the aerobic fermentation treatment object material 100 with bulk density adjusted to be 0.4 kg / m3 or more and 0.6 kg / m3 or less when a load of 2000 kg / m2 is applied, is subjected to the aerobic fermentation and drying in an aerobic fermentation drying apparatus.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a waste treatment plant and a waste treatment method for aerobic fermentation of waste generated in homes, restaurants, traditional Japanese restaurants, hotels, supermarkets, etc., which is a mixture of food waste, paper, plastics, etc., and in particular to a waste treatment plant and a waste treatment method which can simplify the treatment process and reduce energy costs. [Background technology]

[0002] Most household waste generated by households, restaurants, hotels, supermarkets and other food and beverage service industries, schools and other business establishments is separated into several types and collected using methods designated by local governments. Organic waste such as raw vegetables, fruit, meat and other food waste is incinerated as combustible material together with other combustible waste at incineration sites. However, in recent years, in order to reduce the burden on the environment, efforts have been made to reduce the amount of food waste incinerated by reusing it as a resource. For example, a method is known in which food waste is fermented and matured in an aerobic environment to turn it into compost and then recycled as organic fertilizer.

[0003] With regard to waste recycling, Patent Document 1 introduces a municipal waste recycling plant comprising: a pretreatment facility for separating waste into combustible and non-combustible materials; a mixing facility for forming mixed waste by mixing the combustible materials separated in the pretreatment facility with wood material and a return fermentation product, which is a return of a portion of the material to be treated that has been fermented and dried; and a fermentation drying facility having a fermentation unit for generating heat through aerobic fermentation of the mixed waste formed in the mixing facility and drying it, and a deodorization unit for deodorizing the air in the fermentation unit through aerobic fermentation, wherein the deodorization unit of the fermentation drying facility produces condensed water when deodorizing the air in the fermentation unit, and the mixing facility is supplied with condensed water produced in the deodorization unit of the fermentation drying facility, and the supplied condensed water is added to the mixed waste to adjust it to a predetermined moisture content.

[0004] In this patent document 1, waste is pretreated to separate it into combustible and non-combustible materials, and the combustible materials separated in the pretreatment are mixed with wood and return fermentation products and subjected to aerobic fermentation treatment. It is said that the mixed waste obtained by mixing combustible materials, wood and return fermentation products can be effectively fermented and dried by adjusting the moisture content to a predetermined level. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5649697 Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the favorable growth environment for microorganisms, it is preferable that the material to be fermented and dried has a high content of easily decomposable organic matter, which serves as a fermentation substrate for microorganisms, and therefore in Patent Document 1, waste is separated into combustible and non-combustible materials as a pretreatment for the aerobic fermentation treatment, and the combustible materials are further separated into wastepaper and waste plastics, etc., and food waste and fiber scraps, etc., and the food waste and fiber scraps, etc., separated from the combustible materials are subjected to a fermentation and drying treatment. Furthermore, non-combustible materials such as metals, ceramics, and glass, and lightweight materials such as paper, cloth, fiber scraps, and synthetic resin materials that could not be removed in the pretreatment are also separated on a sorting line after the fermentation and drying treatment.

[0007] Therefore, in Patent Document 1, there are problems with the energy consumption and energy costs of separation.In addition, in Patent Document 1, waste with a high moisture content is separated into combustible and non-combustible materials as a pretreatment for aerobic fermentation, and as shown in Figure 2B of Patent Document 1, this is artificial sorting (manual sorting), which raises concerns about hygiene.

[0008] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a waste treatment plant and a waste treatment method that can simplify the treatment process and reduce the energy cost required for waste treatment. [Means for solving the problem]

[0009] The waste treatment plant of the invention of claim 1 produces an aerobic fermentation treatment product by mixing waste with a bulk-increasing bulk density adjusting material and a microbial adhesion body having aerobic microorganisms attached thereto, and adjusting the bulk density by applying a load. Manufacturing The aerobically fermented and dried material is aerobically fermented and dried in an aerobic fermentation and drying facility, and non-combustible materials and vinyl chloride are removed from the aerobically fermented and dried material in a post-treatment facility, and the solid fuel material and / or compost material is selected.

[0010] The bulk density adjustment workshop mixes waste with a bulk-increasing bulk density adjuster and a microbial-attached material with aerobic microorganisms attached thereto, applies a load to reduce the volume, and produces an aerobic fermentation treatment product with adjusted bulk density. Manufacturing A mixer is provided to mix the waste, the bulk density adjusting material, and the microbial adhering material, and the mixture obtained by uniformly mixing the raw materials using the mixer is collected at another location, and the collected mixture is adjusted to a predetermined bulk density by applying a predetermined load using, for example, a resin, metal, or wooden pallet, or the like, or the bulk density adjusting material and the microbial adhering material are added to the waste collected at a certain location, and the mixture is made uniformly mixed using a wheel loader, shovel, or the like, and the mixture is adjusted to a predetermined bulk density by applying a predetermined load using a pallet, etc. Alternatively, the bulk density may be adjusted by storing the mixture in a storage tank and applying a predetermined load in the storage tank.

[0011] The bulk density adjusting material may be anything capable of increasing the volume of the aerobically fermented material so that a certain amount of void space for ventilation can be formed in the pile of the aerobically fermented material. Preferably, a material having water absorption and hygroscopic properties and capable of supporting microorganisms, such as wood chips or a solid fuel obtained by converting a solid fuel raw material selected from aerobically fermented and dried material, can be used. Furthermore, the microbial-attached material may be any material having aerobic microorganisms attached thereto that function as seed bacteria and promote aerobic fermentation of the aerobic fermentation-treated material; for example, a portion of the aerobic fermented and dried material after aerobic fermentation and drying may be used. However, even if the bulk density adjuster is a wood chip or solid fuel, aerobic bacteria will adhere to it after aerobic fermentation and drying, so it also functions as a microbial adhesion body. Therefore, the addition of the bulk density adjuster and the microbial adhesion body does not necessarily need to be distinguished from each other, and they may be used together.

[0012] The aerobic fermentation and drying equipment described above is an aerobic fermentation and drying facility in which waste is aerobically fermented in an airtight room that allows ventilation but is maintained at negative pressure to prevent odor leakage, for example, a housing room in which a ventilation structure is incorporated that takes in outside air and exhausts inside air and an airtight space is defined by concrete or the like, and the waste is dried using the heat of fermentation. Preferably, the progress of aerobic fermentation and drying of the waste is promoted by blowing air to the waste. For example, the aerobic fermentation and drying device is equipped with a fan (blower) or the like, and has an airtight structure in which air can be introduced from the outside and exhausted to the outside and is controlled to a negative pressure. The above waste materials include general household waste, which is burnable garbage such as food waste and paper scraps generated from homes and businesses, office waste, industrial waste such as food waste, animal and food residues, etc.

[0013] The above-mentioned post-treatment facility removes non-combustible materials from the aerobic fermentation and drying processed material after the aerobic fermentation and drying by magnetic separation or the like, and removes vinyl chloride by near-infrared separation or the like, and separates the solid fuel material or compost material, and is composed of, for example, a magnetic separator, a near-infrared device, a particle size / weight separator, etc.

[0014] Claim 1 The aerobic fermentation treatment product of the waste treatment plant of the present invention has a concentration of 2000 kg / m 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3 It is within the following range:

[0015] Claim 1The dimensions of the bulk density adjusting material of the waste treatment plant of the invention are such that the diameter is within the range of 20 mm or more and less than 50 mm, more preferably 20 mm or more and 48 mm or less, and even more preferably 22 mm or more and 48 mm or less, and the length is within the range of 20 mm or more and 250 mm or less, more preferably 50 mm or more and 230 mm or less, and even more preferably 80 mm or more and 200 mm or less. The above-mentioned diameter is not limited to the diameter of a circle when the bulk density adjuster is approximately cylindrical like a solid fuel, but corresponds to the maximum length (width) of a plane approximately perpendicular to the length direction, either vertically, horizontally or diagonally, since the bulk density adjuster is wood chips and has a variable and complex shape rather than a uniform shape.

[0016] Claim 2 The bulk density adjusting material of the waste treatment plant of the present invention is a solid fuel obtained by converting wood chips and / or the solid fuel raw material into a solid fuel. The solid fuel may be of any type, such as RDF (Refuse Derived Fuel) or RPF (Refuse Paper & Plastic Fuel).

[0017] Claim 3 The fermentation and drying equipment of the waste treatment plant of the invention has an air circulation section that draws in air from above into the room where the aerobically fermented material is being aerobically fermented and dried, and blows the drawn-in air from below the room to circulate the air, and the air circulated in the air circulation section is merged with air introduced into the room from outside, and is blown from below the room.

[0018] Claim 4The outside air introduced into the room of the aerobic fermentation and drying equipment of the waste treatment plant of the invention is air from within the building that houses the aerobic fermentation and drying equipment, and air from within the building that can change in temperature less than the outside air is taken in, instead of outside air, into the room where the waste is aerobically fermented, thereby taking in air with less temperature change than the outside air. Note that the above-mentioned storage does not require that the entire aerobic fermentation and drying equipment be stored, and it is acceptable for it to be only a part of it, and it is sufficient that the entrance and exit of the aerobic fermentation and drying equipment is located within the building and is continuous with the building.

[0019] Claim 5 According to the waste treatment method of the present invention, in the bulk density adjustment step, the waste is mixed with a bulk density adjusting material and a microbial-attached material having aerobic microorganisms attached thereto, and a load is applied to adjust the bulk density to produce an aerobic fermentation treatment product. Manufacturing In the aerobic fermentation and drying process, air is introduced from the outside and exhausted to the outside in a room maintained at negative pressure, where the aerobically fermented material is aerobically fermented and dried, and in the post-treatment process, non-combustible matter and vinyl chloride are removed from the aerobically fermented and dried material after the aerobically fermented and dried material, and a solid fuel material and / or compost material is selected.

[0020] The bulk density adjusting step is a process for mixing the waste, a bulk-increasing bulk density adjusting material, and a microbial-attached material having aerobic microorganisms attached thereto, and reducing the volume by applying a load to produce an aerobic fermentation treatment product having an adjusted bulk density. Manufacturing In this process, a mixer is provided for mixing the waste, the bulk density adjusting material, and the microbial adhering material, and the mixture obtained by uniformly mixing the raw materials using the mixer is collected at another location, and the collected mixture is adjusted to a predetermined bulk density by applying a predetermined load using, for example, a resin, metal, or wooden pallet, or the like, or the bulk density adjusting material and the microbial adhering material are added to the waste collected at a certain location, and the mixture is made uniformly mixed using a wheel loader, shovel, or the like, and the mixture is adjusted to a predetermined bulk density by applying a predetermined load using a pallet, etc. Alternatively, the bulk density may be adjusted by storing the mixture in a storage tank and applying a predetermined load in the storage tank.

[0021] The bulk density adjusting material may be anything capable of increasing the volume of the aerobically fermented material so that a certain amount of void space for ventilation can be formed in the pile of the aerobically fermented material. Preferably, a material having water absorption and hygroscopic properties and capable of supporting microorganisms, such as wood chips or a solid fuel obtained by converting a solid fuel raw material selected from aerobically fermented and dried material, can be used. Furthermore, the microbial-attached material may be any material having aerobic microorganisms attached thereto that function as seed bacteria and promote aerobic fermentation of the aerobic fermentation-treated material; for example, a portion of the aerobic fermented and dried material after aerobic fermentation and drying may be used. However, even if the bulk density adjuster is a wood chip or solid fuel, aerobic bacteria will adhere to it after aerobic fermentation and drying, so it also functions as a microbial adhesion body. Therefore, the addition of the bulk density adjuster and the microbial adhesion body does not necessarily need to be distinguished from each other, and they may be used together.

[0022] In the aerobic fermentation and drying process, the waste is aerobically fermented in an airtight room that allows ventilation but is maintained at negative pressure to prevent the leakage of odors, for example, a housing room that has a ventilation structure that takes in outside air and exhausts inside air and defines an airtight space with concrete or the like, and then dried using the heat of fermentation. Preferably, the progress of aerobic fermentation and drying of the waste is promoted by blowing air to the waste. In the aerobic fermentation and drying process, wastewater (leachate) seeping out from the waste undergoing aerobically fermenting is collected, filtered, and then sprayed onto the waste. That is, the leachate seeping out from the waste undergoing aerobically fermenting and excess water from the spraying are collected, foreign matter contained therein is removed with a filter, and then the water is sprayed onto the waste undergoing aerobically fermenting. The above waste materials include general household waste, which is burnable garbage such as food waste and paper scraps generated from homes and businesses, office waste, industrial waste such as food waste, animal and food residues, etc.

[0023] The post-treatment step is a step of, for example, removing incombustible materials by magnetic sorting or the like and removing vinyl chloride by near-infrared sorting or the like, and separating the solid fuel raw material and / or compost raw material.

[0024] Claim 5 The bulk density adjustment step of the waste treatment method of the present invention Manufacturing The aerobic fermentation process Science is 2000kg / m 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3 It is within the following range:

[0025] Claim 5 The bulk density adjusting material to be mixed in the bulk density adjusting step of the waste treatment method of the present invention has a diameter of 20 mm or more and less than 50 mm, more preferably 20 mm or more and 48 mm or less, and even more preferably 22 mm or more and 48 mm or less, and a length of 20 mm or more and 250 mm or less, more preferably 50 mm or more and 230 mm or less, and even more preferably 80 mm or more and 200 mm or less. The above-mentioned diameter is not limited to the diameter of a circle when the bulk density adjuster is approximately cylindrical like a solid fuel, but corresponds to the maximum length (width) of a plane approximately perpendicular to the length direction, either vertically, horizontally or diagonally, since the bulk density adjuster is wood chips and has a variable and complex shape rather than a uniform shape.

[0026] Claim 6 The bulk density adjusting material mixed in the bulk density adjusting step of the waste treatment method of the present invention is wood chips and / or a solid fuel obtained by converting the solid raw material into a solid fuel. The solid fuel may be of any type, such as RDF (Refuse Derived Fuel) or RPF (Refuse Paper & Plastic Fuel).

[0027] Claim 7 In the aerobic fermentation and drying step of the waste treatment method of the present invention, ScienceThe air in the room where the wastewater is being aerobically fermented and dried is drawn in from above, and the drawn in air is blown from below the room to circulate, and the circulated air is mixed with air introduced into the room from outside and blown downward into the room.

[0028] Claim 8 In the aerobic fermentation and drying step of the waste treatment method of the present invention, the outside air introduced into the room where the waste is aerobically fermented is air from within a building that contains the room, and air from within the building that can experience less temperature change than the outside air is introduced into the room where the waste is aerobically fermented, rather than outside air, so that air with less temperature change than the outside air is introduced. Note that the above-mentioned containment does not require that the entire room be contained, but may be only a part of it, and it is sufficient that an entrance and exit for the room is present within the building and is continuous with the building. Effect of the Invention

[0029] Claim 1 According to the waste treatment plant of the present invention, waste is mixed with a bulk-increasing bulk density adjusting material and a microbial-attached material having aerobic microorganisms attached thereto, and a load is applied to adjust the bulk density to produce an aerobic fermentation treatment product. Manufacturing The aerobically fermented and dried material is aerobically fermented and dried in a room where air is introduced from the outside and discharged to the outside to maintain a negative pressure, and post-treatment equipment is used to remove incombustibles and vinyl chloride from the aerobically fermented and dried material after the aerobically fermented and dried process, and to separate solid fuel raw materials and / or compost raw materials. The bulk density adjusting material and microbial adhering material are mixed with waste, and a load is applied to produce an aerobically fermented material having a adjusted bulk density. Manufacturing It is then aerobically fermented and dried.

[0030] In this way, if the aerobically fermented material is a mixture of waste, a bulk-increasing bulk density adjusting material, and a microbial-attached material with aerobic microorganisms attached thereto, and the bulk density is adjusted by applying a load and applying a load and pressure before the aerobic fermentation treatment, even if the weight of water is added by watering, or even if the weight of the upper part of the pile of the aerobically fermented material is added to the lower part, a predetermined porosity is maintained and ventilation is ensured, so that the oxygen supply is equalized and excess moisture is prevented, preventing uneven distribution of aerobic microorganisms, and the entire aerobically fermented material can be efficiently fermented and dried. Therefore, even if non-combustible materials such as metals are not removed before the aerobic fermentation treatment and non-combustible materials are mixed in, aerobic fermentation and drying can be performed in a short time without causing insufficient fermentation. In other words, if the material to be fermented is a mixture of waste, a bulk-increasing bulk density adjusting material, and a microbial-attached material having aerobic microorganisms attached thereto, and the bulk density is adjusted by applying a load, the efficiency of the aerobic fermentation and drying processes can be increased, making it possible to complete the aerobic fermentation and drying processes in a short period of time without having to remove non-combustible matter before the aerobic fermentation and drying process.In addition, since it is only necessary to remove the non-combustible matter after fermentation and drying, the energy and energy costs required for the non-combustible matter removal process can be reduced. Therefore, the process of removing non-combustible materials such as metals prior to aerobic fermentation treatment can be omitted, simplifying the waste treatment process and reducing the energy costs required for waste treatment.

[0031] Claim 1 According to the waste treatment plant of the present invention, the bulk density adjusting working section Manufacturing The aerobic fermentation process Science is 2000kg / m 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3 Since it is within the following range, regardless of whether the waste is general household waste, general office waste, animal and plant residues as industrial waste, food waste, etc., a specified porosity is maintained in the aerobically fermented material to ensure ventilation, and the uneven distribution of aerobic microorganisms is prevented by equalizing the oxygen supply and preventing excess moisture, making it possible to efficiently aerobically ferment and dry the entire aerobically fermented material. Therefore, ,whatWe can handle any type of waste.

[0032] Claim 1 According to the waste treatment plant of the present invention, the dimensions of the bulk density adjusting material are within the range of a diameter of 20 mm or more and less than 50 mm, and a length of 20 mm or more and 250 mm or less, so that a certain amount of space is secured even under the pile of aerobic fermentation treatment products, oxygen deficiency is prevented, and efficient fermentation and drying treatment can be performed, and economical operation is achieved. , Noh This allows for more efficient processing.

[0033] Claim 2 According to the waste treatment plant of the present invention, the bulk density adjusting material is a solid fuel obtained by converting wood chips and / or the solid fuel raw material into a solid fuel, and therefore is low in cost and can easily support aerobic microorganisms, and can be reused repeatedly to promote efficient aerobic fermentation treatment. 1 to In addition to the effects described above, it is possible to promote aerobic fermentation treatment at low cost.

[0034] Claim 3 In the waste treatment plant of the present invention, the aerobic fermentation and drying equipment has an air circulation section that draws in air from above inside the room where the aerobically fermented material is being aerobically fermented and dried, and blows the drawn-in air from below inside the room to circulate the air, and the air circulated in the air circulation section is mixed with outside air and blown from below inside the room.

[0035] Therefore, the claim 3 According to the waste treatment plant of the present invention, the air circulation section creates an air passage through which air flows from the bottom to the top of the aerobically fermented material piled up inside the aerobic fermentation and drying equipment, and the air supply to the aerobically fermented material is equalized without stirring the aerobically fermented material, thereby improving the processing efficiency of the aerobic fermentation and drying of the aerobically fermented material. In particular, inside the aerobic fermentation and drying equipment, the aerobically fermented material is aerobically fermented by aerobic microorganisms, and the heat of fermentation and ventilation cause water to evaporate, causing the humidity to rise, and the air sucked in from above in the room becomes humid, whereas the circulating air is mixed with outside air, so that the air introduced into the room becomes relatively less humid. That is, by circulating the air sucked in from above in the room in the air circulation section, combining with the outside air and blowing it from below in the room, air with a lower relative humidity than the air sucked in from above in the room passes through the aerobically fermented material from the bottom to the top of the room. Thus, the air that aerates the aerobically fermented material can easily evaporate the water in the aerobically fermented material. Therefore, claim 1 Or claim 2 In addition to the effects described above, the processing efficiency of aerobic fermentation and drying of the aerobic fermentation treatment target can be improved at low cost.

[0036] Claim 4 According to the waste treatment plant of the present invention, the outside air introduced into the room of the aerobic fermentation and drying equipment is air from within the building housing the aerobic fermentation and drying equipment, and is therefore not easily affected by the outside air temperature. In other words, even when the outside air temperature is low, such as in winter, cold air is not introduced into the room of the aerobic fermentation and drying equipment, and it is possible to prevent a decrease in the efficiency of water evaporation and reduce the burden on the aerobic microorganisms. Therefore, the present invention provides the following: 3 In addition to the effects described in any one of the above, the processing efficiency of the aerobic fermentation and drying of the aerobic fermentation treatment target material can be further improved at low cost.

[0037] Claim 5 According to the waste treatment method of the present invention, in the bulk density adjustment step, the waste is mixed with a bulk density adjusting material and a microbial-attached material having aerobic microorganisms attached thereto, and a load is applied to adjust the bulk density to produce an aerobic fermentation treatment product. Manufacturing In the aerobic fermentation and drying process, air is introduced from the outside and air is exhausted to the outside to maintain a negative pressure in a room where the waste is aerobically fermented and dried, and in the post-treatment process, non-combustible matter and vinyl chloride are removed from the aerobically fermented and dried product after the aerobically fermented and dried product is selected as a solid fuel material and / or a compost material.

[0038] In this way, if the aerobically fermented material is a mixture of waste, a bulk-increasing bulk density adjusting material, and a microbial-attached material with aerobic microorganisms attached thereto, and the bulk density is adjusted by applying a load and applying a load and pressure before the aerobic fermentation treatment, even if the weight of water is added by watering, or even if the weight of the upper part of the pile of the aerobically fermented material is added to the lower part, a predetermined porosity is maintained and ventilation is ensured, so that the oxygen supply is equalized and excess moisture is prevented, preventing uneven distribution of aerobic microorganisms, and the entire aerobically fermented material can be efficiently fermented and dried. Therefore, even if non-combustible materials such as metals are not removed before the aerobic fermentation treatment and non-combustible materials are mixed in, aerobic fermentation and drying can be performed in a short time without causing insufficient fermentation. In other words, if the material to be fermented is a mixture of waste, a bulk-increasing bulk density adjusting material, and a microbial-attached material having aerobic microorganisms attached thereto, and the bulk density is adjusted by applying a load, the efficiency of the aerobic fermentation and drying processes can be increased, making it possible to complete the aerobic fermentation and drying processes in a short period of time without having to remove non-combustible matter before the aerobic fermentation and drying process.In addition, since it is only necessary to remove the non-combustible matter after fermentation and drying, the energy and energy costs required for the non-combustible matter removal process can be reduced. Therefore, the process of removing non-combustible materials such as metals prior to aerobic fermentation treatment can be omitted, simplifying the waste treatment process and reducing the energy costs required for waste treatment.

[0039] Claim 5 According to the waste treatment method of the present invention, Manufacturing The aerobic fermentation process Science is 2000kg / m 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3Since the range is as follows, regardless of whether the waste is general household waste, general office waste, animal and plant residue as industrial waste, food waste, etc., a predetermined porosity is maintained in the aerobically fermented material to ensure ventilation, and the uneven distribution of aerobic microorganisms is prevented by equalizing the oxygen supply and preventing excess moisture, making it possible to efficiently perform aerobically fermentation and drying of the entire aerobically fermented material. Therefore, Whaaat? We can handle any type of waste.

[0040] Claim 5 According to the waste treatment method of the present invention, the dimensions of the bulk density adjusting material are within the range of a diameter of 20 mm or more and less than 50 mm, and a length of 20 mm or more and 250 mm or less, so that a certain amount of space is secured even at the bottom of the pile, and oxygen deficiency can be prevented, allowing efficient fermentation and drying treatment, and economical operation. , Noh This allows for more efficient processing.

[0041] Claim 6 According to the waste treatment method of the present invention, the bulk density adjusting material is a solid fuel obtained by converting wood chips and / or the solid fuel raw material into a solid fuel, and therefore is low in cost and can easily support aerobic microorganisms, and can be reused repeatedly to promote efficient aerobic fermentation treatment. 5 In addition to the effects described above, it is possible to promote aerobic fermentation treatment at low cost.

[0042] Claim 7 According to the waste treatment method of the present invention, the aerobic fermentation and drying step has an air circulation section that draws in the air from above inside the room where the aerobically fermented material is being aerobically fermented and dried, and blows the drawn-in air from below inside the room to circulate the air, and the air circulated in the air circulation section is mixed with outside air and blown from below inside the room, so that an air passage is formed through which air flows from below to above the aerobically fermented material being aerobically fermented and dried indoors, and the processing efficiency of the aerobically fermented and dried material can be improved by equalizing the air supply to the aerobically fermented material without stirring the aerobically fermented material. In particular, in the room where the aerobically fermented material is aerobically fermented and dried, the aerobically fermented material is aerobically fermented by aerobic microorganisms, and the moisture evaporates due to the heat of fermentation and ventilation, causing the humidity to rise, and the air sucked in from above in the room becomes humid, whereas the circulating air is mixed with outside air to make the air introduced into the room relatively less humid. That is, by combining the circulating air sucked in from above in the room with the outside air and blowing it from below in the room, air with a lower relative humidity than the air sucked in from above in the room passes through the aerobically fermented material from the bottom to the top of the room. Therefore, the moisture in the aerobically fermented material can be easily evaporated by the air that aerates the aerobically fermented material. From this, claim 5 or claim 6 In addition to the effects described above, the processing efficiency of aerobic fermentation and drying of the aerobic fermentation treatment material can be improved at low cost.

[0043] Claim 8 According to the waste treatment method of the present invention, in the aerobic fermentation and drying step, the outside air introduced into the room where the aerobically fermented material is aerobically fermented and dried is air from within the building housing the aerobic fermentation and drying equipment, and is therefore less susceptible to the effects of outside air temperature. In other words, even when the outside air temperature is low, such as in winter, cold air is not introduced into the room where the aerobically fermented material is aerobically fermented and dried, preventing a decrease in the evaporation efficiency of water and reducing the load on aerobic microorganisms. 5 or claims 7 In addition to the effects described in any one of the above, the processing efficiency of the aerobic fermentation and drying of the aerobic fermentation treatment target material can be further improved at low cost. [Brief description of the drawings]

[0044] [Figure 1] FIG. 1 is a flow chart of a waste treatment process in a waste treatment plant according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a conceptual diagram of waste treatment in a waste treatment plant according to an embodiment of the present invention. [Diagram 3]FIG. 3 is a conceptual diagram of a post-treatment process after aerobic fermentation treatment in a waste treatment plant according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0045] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiments, the same symbols and reference numerals in the drawings indicate the same or corresponding functional parts, and therefore, redundant description thereof will be omitted here.

[0046] First, an outline of the overall flow of waste treatment in a waste treatment plant according to an embodiment of the present invention will be described mainly with reference to the flowchart in Fig. 1. The waste treatment according to this embodiment 1 is applied to waste recycling, which recycles waste 1 into solid fuel, compost, etc. When household or business general waste, such as food waste, wastepaper, and other burnable garbage that has been discharged from homes or businesses and collected and transported by garbage truck 11, or waste 1 such as food waste and animal and plant residues as industrial waste, enters building 110, first, in the crushing process of step S1, the crusher 14 breaks the dust bags that have contained the waste 1, such as food waste, paper, and plastics. The waste is then reduced in volume by rough crushing, crushing, and the like. In the subsequent bulk density adjustment process of step S2, the broken waste 1 is mixed with bulk density adjustment material 2 such as wood chips that increases the bulk of the waste 1 pile in order to create many ventilation gaps, and microbial attachment material 3 such as fine fermentation residue particles having aerobic microorganisms attached thereto, and the bulk density is adjusted so that it falls within a specified range when a specified load is applied, to form an aerobically fermented material 100.

[0047] Next, the fermentation treatment material 100 adjusted to a predetermined bulk density is loaded into a concrete housing 121 of an aerobic fermentation drying apparatus 120 in an aerobic fermentation and drying facility stored in whole or in part within a building 110, where it is aerobically fermented and dried for a predetermined number of days as the fermentation and drying process of step 3. At this time, in the fermentation drying apparatus 120, water is sprinkled (sprayed) onto the aerobically fermented material 100 in the housing 121. In particular, in this embodiment, wastewater discharged into the building 110 or the housing 121, i.e., wastewater seeping out from the waste material 1 or the aerobically fermented material 100, is collected and filtered with a filter 172, and the filtered water is used for sprinkling (spraying) into the housing 121. Furthermore, in the housing 121 of the aerobic fermentation drying apparatus 120, oxygen is replenished by discharging air (odor) and taking in fresh air from the building 110, and the interior of the housing 121 is controlled to a predetermined temperature and negative air pressure.

[0048] Here, in this embodiment, the humid air (odor) discharged from the housing 121 is introduced into the air plenum chamber 130 as an exhaust adjustment process in step S5, where it is mixed with the introduced air taken in from inside the building 110 outside the housing 121, and then sent to the biological deodorization device 140 of the deodorization equipment installed outdoors in the building 110. Then, in the biological deodorization process of step S6, the mixed air from the air plenum chamber 130 passes through a biofilter 142 in the biological deodorization device 140, which is made of a pile of carriers such as wood chips to which aerobic microorganisms are attached, and the odorous components contained therein are decomposed and deodorized by the aerobic microorganisms in the biofilter 172, and the odorous components are exhausted (released) to the outside, i.e., into the outdoor atmosphere. At this time, in the biological deodorization device 140, water is sprayed onto the bio-filter 172, and the surplus water is collected and reused as water sprayed again.

[0049] Meanwhile, the aerobic fermentation and drying processed material 200 that has completed aerobic fermentation and drying in the aerobic fermentation and drying apparatus 120 is sorted in a post-processing step S4 to remove non-combustible material 230 by magnetic sorting or the like and vinyl chloride 240 by infrared sorting or the like, and is separated into solid fuel raw material 210 and / or compost raw material 220, bulk density adjustment material 2 such as wood chips mixed in the bulk density adjustment step of step S2 described above, and fine aerobic fermentation residue to be used as microbial attachment material 3 to which aerobic microorganisms are attached, based on criteria such as size and gravity (specific gravity).

[0050] Thus, the waste treatment plant of this embodiment aerobically ferments and dries waste 1, which is a mixture of food waste, plastic, paper, cloth, etc., to recycle it into solid fuel material 21, compost material 22, etc. That is, the waste 1, which is a mixture of plastic, paper, cloth, etc., is aerobically fermented and dried to produce solid fuel material 21 and compost material 22.

[0051] In particular, in the waste treatment plant of this embodiment, waste 1 is mixed with a bulk density adjusting material 2 and a microbial adhesion material 3 to produce an aerobic fermentation treatment material 100 whose bulk density is adjusted to be within a predetermined range when a predetermined load is applied. Manufacturing As a result, in the aerobically fermented material 100 adjusted to the specified bulk density, oxygen is sufficiently supplied and aeration is achieved even in the lower part of the pile, and aerobic fermentation and drying proceed evenly throughout the material to be treated. This makes it possible to efficiently ferment and dry the entire material to be treated without insufficient fermentation, even without removing non-combustible materials before the aerobic fermentation treatment.

[0052] Next, the overall configuration of the waste treatment plant of this embodiment and the overall flow of waste treatment will be described in detail with reference to FIGS. 2 and 3. FIG. The waste 1, such as burnable garbage as household or business general waste, food waste as industrial waste, animal and plant residues, etc., collected by the garbage collection truck 11, is lowered to the receiving yard Y1 in the building 110 of the waste treatment plant and received in the building 110. From there, the waste is relayed by a wheel loader 12 or the like, and is fed into the hopper of the crusher 14 via a belt conveyor 13 or the like. This crusher 14 breaks the garbage bags containing food waste, plastic, paper, cloth, etc. That is, the crusher 14 at least breaks the bags by applying an external force, and specifically, the crusher 14, which rotates at a low speed, has a bag breaking function and a crushing function that perform multi-stage volume reduction, homogenization, and bag breaking for the received waste 1. Therefore, the waste 1 resulting from processing by this crusher 14 is the received waste 1 that has been broken into bags and reduced in volume. In carrying out the present invention, the crusher 14 is only required to have at least a bag breaking function, and the crushing method may be any of impact, shear force, rotational force, compression force, and the like.

[0053] The waste 1 broken into bags by the crusher 14 is relayed by a wheel loader 12 or the like and collected in a waste stockyard Y2 in a building 110. The waste 1 collected in the waste stockyard Y2 is relayed again by a wheel loader 12 or the like and fed into a hopper of a mixer 15 in the mixing work section. In addition to the predetermined amount of waste 1 that has been fed, the mixer 15 also feeds predetermined amounts of bulk density adjusting material 2 such as wood chips and microbial-attached material 3 to which aerobic microorganisms are attached, such as fine granulated aerobic fermentation residue. In this embodiment, before storing the mixture in the housing 121 of the aerobic fermentation and drying apparatus 120 as the aerobic fermentation and drying facility, the mixture mixed in the mixer 15 is collected in the bulk density adjustment yard Y3 of the mixing work section in the building 110, where the mixture is mixed as many times as necessary using a wheel loader or the like so as to be uniformly mixed, and then a load is applied from above using a plastic, wooden, or metal pallet 17 or the like to load the mixture to a density of 2000 kg / m 2 The bulk density when a load of 0.40 kg / m is applied 3 More than 0.60kg / m 3 Within the range of 0.41 kg / m 3 More than 0.59kg / m3 Within the range of 0.42 kg / m 3 More than 0.58kg / m 3 The bulk density was adjusted to fall within the following range to produce an aerobic fermentation treatment product 100 having a predetermined bulk density. Manufacturing do.

[0054] The bulk density adjusting material 2 to be mixed with the broken waste 1 may be any organic material of a predetermined size capable of increasing the volume of the aerobically fermented material 100 pile to form ventilation gaps within the pile, and is preferably an organic material that is water-absorbent and hygroscopic and capable of supporting microorganisms, such as wood materials such as wood chips, or solid fuels such as RDF (Refuse Derived Fuel) or RPF (Refuse Paper & Plastic Fuel) made by converting solid fuel raw material 210 selected from the aerobically fermented and dried material 200 into solid fuel. Wood chips and solid fuels are low cost, and because they are easy to support aerobic microorganisms, they can be reused repeatedly to promote efficient aerobic fermentation. This makes it possible to promote aerobic fermentation at low cost. In particular, RDF, which is a solid fuel, contains a large amount of decomposed food waste, so heat (fermentation heat) can be expected to be generated by the aerobic fermentation of aerobic microorganisms, and this can be expected to promote the progress of aerobic fermentation and drying of the aerobically fermented material 100.

[0055] The bulk density adjusting material 2 such as wood chips or solid fuel for forming a predetermined gap in the pile of the aerobic fermentation treatment material 100 is preferably, for example, in a diameter of 20 mm or more and less than 50 mm, more preferably, 20 mm or more and 48 mm or less, and even more preferably, 22 mm or more and 48 mm or less, and in a length of 20 mm or more and 250 mm or less, more preferably, 50 mm or more and 230 mm or less, and even more preferably, 80 mm or more and 200 mm or less. If the dimensions are too large, the amount of the selected residue 10A and the methane fermentation residue 110 to be treated is reduced, resulting in uneconomical operation, or the uniform gaps cannot be secured, which tends to cause partial insufficient fermentation. On the other hand, if the dimensions are too small, the predetermined gaps cannot be secured at the bottom of the pile, which tends to cause insufficient aeration, which slows down the treatment speed and reduces the treatment efficiency of fermentation and drying. If the dimensions are within this range, a certain amount of space can be secured even at the bottom of the pile, preventing oxygen deficiency and allowing efficient fermentation and drying treatment, while also resulting in economical operation. This allows for efficient treatment.

[0056] In addition, the efficiency of the aerobic fermentation treatment is improved by mixing in the microbial-attached material 3 having aerobic microorganisms attached thereto. Since the aerobically fermented and dried product 200 has many aerobic microorganisms attached thereto, the bulk density adjusting material 2 such as fine aerobic fermentation residue or wood chips remaining when the solid fuel material 210 or the compost material 220 is selected from the aerobic fermentation and dried product 200 can be returned and used as the microbial-attached material 3. Therefore, the bulk density adjusting material 2 such as wood chips after the aerobic fermentation treatment also functions as the microbial-attached material 3. Of course, a different carrier having aerobic microorganisms attached thereto may be used.

[0057] Thus, in the bulk density adjustment yard Y3, the waste 1, the bulk density adjustment material 2, and the microbial adhesion body 3 are mixed and a predetermined load is applied by a pallet 17 or the like. As a result, the density of the mixture is 2000 kg / m 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3 The aerobic fermentation treatment product 100 is produced within the following range. ManufacturingThen, the aerobically fermented material 100 adjusted to the predetermined bulk density is transferred into the housing 121 of the aerobic fermentation and drying device 120, where the aerobic fermentation and drying treatments are carried out.

[0058] Thus, 2000 kg / m 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3 By adjusting the bulk density of the aerobic fermentation treatment material 100 to within the following range, a sufficient amount of void space for ventilation is ensured, so that aerobic microorganisms can be actively operated even if a certain amount of difficult-to-decompose impurities are mixed in. That is, the bulk density of the aerobically fermented material 100 to be aerobically fermented is 2000 kg / m 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3 Within the following range, by adjusting the bulk density by applying a predetermined load in advance, and by discharging the excess moisture portion of the raw material when the predetermined load is applied in advance, even if the weight of water droplets from the ceiling side of the housing 121 of the aerobic fermentation and drying treatment device 120 is added as described below, or even if the weight of the upper part of the pile is applied to the lower part, the bulk density is unlikely to change, and a volume of voids that allows ventilation within the piled aerobically fermented material 100 is secured, preventing oxygen deficiency due to insufficient ventilation. Therefore, by supplying oxygen evenly without stirring, the movement of anaerobic bacteria is suppressed, and aerobic fermentation by aerobic microorganisms proceeds evenly throughout the entire aerobically fermented material 100, allowing efficient aerobic fermentation and drying, and even if some persistent impurities are mixed in, insufficient fermentation is prevented and aerobic fermentation and drying can be performed in a short time.

[0059] In this embodiment, as described below, indoor air is drawn in from the top of the housing 121 by the air circulation section 163, and air is ejected from the bottom onto the aerobically fermented material 100 accumulated in the housing 121, forming an air flow from the bottom to the top, whereby the air flow passing through the internal gaps formed by adjusting the aerobically fermented material 100 to a predetermined bulk density increases the oxygen supply efficiency, thereby increasing the aerobic fermentation treatment efficiency and also increasing the drying treatment efficiency. Furthermore, the air flow allows for uniform distribution of microorganisms, thereby enabling uniform aerobic fermentation of the entire aerobically fermented material 100.

[0060] Next, the aerobically fermented material 100 adjusted to a predetermined bulk density in the bulk density adjustment yard Y3 in the building 110 in this manner is transported by a wheel loader or the like into the housing 121 of the fermentation drying apparatus 120 which has an inlet / outlet within the building 110 and is installed continuously with the building 110, where it is subjected to aerobically fermentation and drying treatment.

[0061] Here, the housing 121 of the fermentation drying apparatus 120 may be made of, for example, concrete, and may be configured to maintain a sealed state sufficient to effectively block the air flows between the inside and outside of the room, and to freely control the indoor temperature so that it does not match the outdoor temperature. The housing 121 usually has a loading / unloading opening that can be opened and closed with a door that can block the airflow between the inside and outside of the room. Even if there is a gap between the loading / unloading opening and the door, the airflow from the inside to the outside of the room is prevented by the negative pressure on the inside of the room, and the airflow from the outside to the inside of the room is permitted. The door is opened only when loading the aerobically fermented material 100 and unloading the aerobically fermented and dried material 200, and is always closed during the treatment process. The number of housings 121 of the fermentation and drying apparatus 120 is preferably multiple, but may be one, and in the case of multiple housings, they are operated by batch processing, and the capacity and number of housings can be determined based on the number of operating days and the processing amount. The overall shape of the housing 121 is not particularly limited, and may be a cylinder with a square cross section that forms the bottom, both sides, and the ceiling, or a dome-shaped cylinder.

[0062] In the fermentation and drying apparatus 120 of this embodiment, indoor air is drawn in from the top of the housing 121 by a fan (blower) 165, and the air is compressed and ejected from the underside of the housing 121 to form an air circulation section 163 that circulates the air within the housing 121, thereby providing ventilation to the aerobic fermentation treatment material 100 loaded into the housing 121. In addition, an air exhaust section 162 is formed to exhaust the indoor air of the housing 121, and an air introduction section 161 is formed to introduce air from within the building 110 outside the housing 121 into the interior of the housing 121, providing ventilation to constantly maintain the interior of the housing 121 at negative pressure.

[0063] In the fermentation drying apparatus 120 of this embodiment, the input into the housing 121 room of air introduction section 161, which takes in air from the building 110 outside the housing 121 room, and the input into the housing 121 room of air circulation section 163, which sucks in air from the top of the housing 121 and sprays it out from the bottom, are combined, and a fan (blower) 165 is disposed in the path where the air introduction section 161 and the air circulation section 163 join, and the air output from the top of the housing 121 by the suction of fan 165 and the air taken in from the building 110 outside the housing 121 are combined and sprayed out from the underside of the housing 121.

[0064] In particular, in the fermentation drying apparatus 120 of this embodiment, a damper (valve for adjusting flow rate) 166a capable of adjusting the amount of air introduced from inside the building 110 outside the housing 121 in the air introduction section 161 is provided on the input side (intake side) of the fan 165, in a path before the junction of the air introduction section 161 and the air circulation section 163. Also, a damper 166b for adjusting the amount of air taken in from the upper part of the housing 121 is provided in the air circulation section 163 in a path before the junction of the air introduction section 161. This makes it possible to adjust the temperature, oxygen amount, and pressure to maintain a negative pressure inside the housing 121 by individually adjusting the input amounts of both using the dampers 166a and 166b, without switching between the input of fresh air by the air introduction section 161 and the input of circulated air by the air circulation section 163.

[0065] Therefore, in the fermentation drying apparatus 120 of this embodiment, by driving the fan 165 arranged in the joining path of the air introduction section 161 and the air circulation section 163, indoor air is drawn in from the top of the housing 121 in the air circulation section 163, and air is drawn in from inside the building 110 outside the housing 121 in the air introduction section 161.The air output from the housing 125 in the joining path of the air introduction section 161 and the air circulation section 163 is mixed with the air taken in from inside the building 110 outside the housing 121, and this is blown out from the fan 165 and ejected from the underside of the housing 121 as compressed air. In other words, the compressed air that is sprayed from the underside of housing 121 and input into housing 121 is a mixture of air sucked in from the top of housing 121 at air circulation section 163 and air taken in from inside building 110 outside housing 121 at air introduction section 161. In this way, fresh air taken in from inside building 110 outside housing 121 at air inlet 161 is supplied to housing 121 from the underside of housing 121, whereby oxygen is replenished inside housing 121.

[0066] In this embodiment, a mixture of air sucked in from the top of the housing 121 in the air circulation section 163 and air introduced in the air introduction section 161 from inside the building 110 outside the housing 121 is blown and supplied to the aerobic fermentation treatment material 100 from the bottom inside the housing 121. Since this mixed air has a relatively lower humidity than the air sucked in from the top of the housing 121, it is easier to evaporate the moisture in the aerobic fermentation treatment material 100 as it passes from top to bottom inside the aerobic fermentation treatment material 100.

[0067] That is, the air sucked in from the upper part of the housing 121 in the air circulation section 163 contains a lot of moisture resulting from evaporation of moisture from the aerobically fermented material 100 and moisture from watering, while the air taken in from inside the building 110 outside the housing 121 usually has relatively low humidity, so that the air that is mixed with the air and sprayed out from the underside of the housing 121 and aerated through the aerobically fermented material 100 has a relatively lower humidity than the air output from the upper part of the housing 121. Therefore, it is possible to increase the drying efficiency of drying the moisture in the aerobically fermented material 100 by the air aerated through the aerobically fermented material 100.

[0068] Furthermore, while the building 110 is usually constructed with poor ventilation to prevent odors, it is less susceptible to the effects of outside air temperature even in winter, and by taking in air from inside the building 110 instead of outside air in the air inlet 161, a drop in the temperature of the air introduced from the air inlet 161 is suppressed even in winter, the load on the aerobic microorganisms is reduced, and a decrease in the processing efficiency of aerobic fermentation and drying can be suppressed. In other words, by suppressing changes in the temperature of the air introduced from the air inlet 161 without being greatly affected by changes in outside air temperature, the load on the aerobic microorganisms is reduced, and the processing efficiency of aerobic fermentation and drying can be maintained.

[0069] In this embodiment, when the fan 165 is operating, the airflow of the air circulation section 163 and the air introduction section 161 does not stop, and oxygen is constantly supplied to the aerobic fermentation treatment material 100 by the air introduction section 161, thereby increasing the processing efficiency of the aerobic fermentation and drying of the aerobic fermentation treatment material 100 by aerobic microorganisms. By constantly operating the fan 165, including when the aerobic fermentation treatment material 100 is carried in and when the aerobic fermentation drying treatment material 200 is carried out, clogging of the suction and exhaust ports in the housing 121 can be prevented. If necessary, the air volume can be adjusted by controlling the speed of the fan 165 by inverter control, and it is also possible to perform energy-saving operation by reducing the rotation speed. When multiple housings 121 for batch processing are provided, it is preferable to provide a fan 165 for each housing 121. Furthermore, in the fermentation drying apparatus 120 of this embodiment, the input into the housing 121 of the air circulation section 163, which circulates the air within the housing 121, and the input into the housing 121 of the air introduction section 161, which introduces air from within the building 110, are combined together, so that the number of parts can be reduced and the apparatus can be constructed at low cost.

[0070] In the fermentation and drying apparatus 120 of this embodiment, an air discharge section 162 is formed to discharge the indoor air of the housing 121 to the outside, and a damper 163c is disposed therein to adjust the amount of air discharged from the inside of the housing 121. Therefore, the amount of air (m 3 / min) and the amount of air (m 3 / min), the interior of housing 121 is maintained at a negative pressure to prevent odors from leaking out of the interior of housing 121, and it is also possible to adjust the temperature, amount of oxygen, etc., within the interior of housing 121.

[0071] That is, in the fermentation drying apparatus 120 of this embodiment, the amount of air introduced into the housing 121 from inside the building 110 outside the housing 121, the amount of circulating air drawn in from the top of the housing 121 and returned to the bottom of the housing 121, and the amount of air exhausted from the housing 121 to the outside can each be individually adjusted by dampers 166a, 166b, and 166c, so that the inside of the housing 121 does not become positive pressure; in other words, the inside of the housing 121 is at negative pressure to prevent air from flowing from the inside to the outside, preventing odors from inside the housing 121 from escaping outside the housing 121, and the inside of the housing 121 is controlled to a temperature and oxygen environment suitable for the growth of aerobic microorganisms and a ventilation volume that promotes drying. As described below, the air exhaust section 162 that exhausts the air inside the housing 121 is connected to the air plenum chamber 130, where the air is mixed with the air introduced from inside the building 110 outside the housing 121, and then deodorized by the biological deodorizing device 140 and exhausted into the outside air (atmosphere).

[0072] Moreover, in the fermentation and drying apparatus 120 of this embodiment, water is sprayed into the interior of the housing 121 from the upper part of the housing 121. This makes it possible to uniformly add moisture necessary for the activity and growth of the aerobic microorganisms that aerobically ferment the aerobic fermentation treatment material 100, thereby improving the treatment efficiency of the aerobic fermentation.

[0073] In particular, in this embodiment, wastewater discharged from within the housing 121, i.e., leachate seeped from the waste 1 in the aerobic fermentation treatment material 100 loaded into the housing 121 and excess water from sprinkling, and further, wastewater discharged (generated) at places other than the housing 121 within the building 110, such as leachate seeped from the waste 1 and wastewater such as equipment cleaning water, are recovered and collected, filtered to remove foreign matter and the like using a biofilter 172, and then used for sprinkling water sprayed inside the housing 121.

[0074] That is, in this embodiment, a first circulating water system 171 is formed which collects wastewater discharged from the housing 121, and furthermore, wastewater discharged from within the building 110 other than the housing 121, and sprays them onto the aerobic fermentation treatment material 100 loaded inside the housing 121.

[0075] Housing 121 has a drainage groove formed at its bottom, through which the water contained in the aerobic fermentation treatment material 100 and the sprayed excess water are discharged outside the housing 121 and collected. After foreign matter and the like contained in the wastewater is removed by filter 172, the filtered water is returned to the housing 121 chamber and sprayed from the top of the chamber as water to humidify the interior of housing 121. In addition, a water collection structure for collecting wastewater is also provided within building 110 outside housing 121, and, similar to the wastewater collected from housing 121, foreign matter and the like is removed from the collected wastewater using filter 172, and the filtered water is then sprayed from the upper part of the interior of housing 121 as watering to humidify the interior of housing 121. In other words, in the first circulating water system 171 of this embodiment, wastewater discharged from the housing 121 and wastewater discharged from a location separate from the housing 121 are collected, filtered by filter 172, and then sprayed as water droplets inside the housing 121 using a watering nozzle provided on the ceiling side of the housing 121.

[0076] This first circulating water system 171 is provided with a water storage tank 173A for collecting wastewater discharged from the housing 121 and wastewater discharged from places other than the housing 121, a filter 172 for filtering water pressurized and discharged from the water storage tank 173A by a pump or the like, and a water storage tank 173B for storing purified water that has passed through the filter 172, and the water collected in the water storage tank 173B is pressurized by a pump or the like and pumped to a spray nozzle provided inside the housing 121, where it is sprayed from the spray nozzle. The filter 172 may be any filter that removes dirt, sand, fine particles, etc. contained in the wastewater, but may pass aerobic microorganisms. In this embodiment, a supply line 174 is provided so that water from a second circulating water system 181, which collects and reuses water sprayed on a biological deodorizing device 140 (described later), can also be introduced into the water storage tank 173A of the first circulating water system 171 via a valve or the like. Furthermore, water from the outside, such as industrial water or drinking water, can also be introduced into the water storage tank 173B via a valve or the like.

[0077] Therefore, water discharged from housing 121 and water generated in places other than housing 121, such as inside building 110, are collected in water storage tank 173A. The water collected in water storage tank 173A is pressure-fed to filter 172 by a pump or the like, where foreign matter is removed, and then input to water storage tank 173B. The water collected in water storage tank 173B is pressurized by a pump or the like and pressure-fed to a spray nozzle provided inside housing 121, and sprayed from the spray nozzle.

[0078] Thus, in the waste treatment plant of this embodiment, the wastewater discharged into the housing 121, including the moisture contained in the aerobic fermentation treatment material 100 and the excess water sprayed into the housing 121, is discharged outside the housing 121 through a drain formed in the bottom of the housing 121 and used as water spraying via the water storage tank 173A, filter 172, and water storage tank 173B, and is not discharged to the outside. Furthermore, the wastewater generated in places other than the housing 121 is also collected and used to spray water on the aerobic fermentation treatment material 100, and is not discharged to the outside.

[0079] In addition, in the first circulating water system 171 of this embodiment, by providing water storage tanks 173A and 173B, it is possible to respond to fluctuations in the amount of moisture, and when there is a shortage of water in the water storage tanks 173A and 173B, water can be replenished from the second circulating water system 181 or from the outside, thereby preventing excess moisture from being stored and reducing costs.

[0080] In this way, the first circulating water equipment 171 collects wastewater from inside the housing 121, and also collects wastewater generated inside the building 110 other than the housing 121, and sprays it inside the housing 121, thereby making it possible to equalize the supply of moisture and replenish moisture to the aerobically fermented material 100 being aerobically fermented inside the housing 121 of the aerobic fermentation drying apparatus 120. This prevents uneven distribution of aerobic fermentation and drying and makes it possible to uniformly perform aerobic fermentation throughout the aerobically fermented material 100, thereby enabling efficient aerobic fermentation and drying.

[0081] In particular, in the aerobic fermentation drying apparatus 120, wastewater seeping out from the aerobically fermented material 100 inside the housing 121 is sprayed on the aerobically fermented material 100 after removing foreign matter with a filter 172 without being discharged to the outside, and the wastewater, including the surplus water from the spraying, is collected and used for repeated spraying, and since the wastewater generated inside the housing 121 contains aerobic microorganisms, the water sprayed with the wastewater as droplets also contains aerobic microorganisms, thereby distributing the aerobic microorganisms uniformly over the aerobically fermented material 100 and improving the efficiency of the treatment by aerobic fermentation. In other words, the spraying of water droplets also moves the aerobic microorganisms from top to bottom, enabling efficient aerobic fermentation treatment.

[0082] Furthermore, wastewater from inside the housing 121 and wastewater generated within the buildings 110 other than the housing 121 are collected and used for watering, so the moisture required by the aerobic microorganisms for efficient aerobic fermentation treatment can be provided at low cost, and since the wastewater is not discharged to the outside, purification for drainage is unnecessary.

[0083] The water that has fallen into the drainage groove of the housing 121 may be discharged by sucking it up with a pump or the like when a predetermined amount of water is collected and collected in the water storage tank 173A, or may be made to flow to the water storage tank 173A side when the drainage water accumulates to a predetermined amount or more. Also, the components for draining the housing 121 may be used as components for inputting air into the housing 121. That is, the first circulating water equipment 171 may have a drainage pipe for flowing the water discharged from the drainage groove provided at the bottom of the housing 121 to the water storage tank side, and air to be introduced into the housing 121 of the air introduction unit 161 and the air circulation unit 163 may be introduced from the drainage groove side through the above pipe. In this case, when the drained water is flowed to the water storage tank 173A side by the suction pump or the like, it is only necessary to switch the software to stop the introduction of air, so that the number of parts can be reduced. Of course, it is also possible to configure it separately.

[0084] In this manner, in the aerobic fermentation drying apparatus 120 of this embodiment, water droplets are sprayed by the first circulating water equipment 171 into the housing 121 room in which the aerobically fermented material 100 is loaded, and oxygen is constantly replenished by the introduction of air from within the building 110 outside the housing 121 room through the air inlet section 161, thereby activating the aerobic microorganisms in the aerobically fermented material 100 containing the microbial attachment material 3, and aerobic fermentation of the aerobically fermented material 100 by the aerobic microorganisms progresses.

[0085] In particular, in the aerobic fermentation drying apparatus 120 of this embodiment, the temperature, pressure, and oxygen amount are controlled by adjusting the amount of air exhausted from inside the housing 121 by the air exhaust unit 162, the amount of air introduced from outside the housing 121 by the air introduction unit 161, and the amount of air circulated inside the housing 121 by the air circulation unit 163, thereby enabling efficient aerobic fermentation treatment by maintaining an environment suitable for the activation and growth of aerobic microorganisms. In this embodiment, information on the aerobic fermentation drying apparatus 120 is also managed and controlled by a computer. For example, information on at least the indoor temperature and indoor pressure of the housing 121, information on the temperature inside the building 110 outside the housing 121, information on the temperature of the air exhausted from inside the housing 121 by the air exhaust unit 162, information on the temperature of the water sprayed into the housing 121 by the first circulating water equipment 171, and the like are detected by sensors and input to the computer COMP. The information input to the computer COMP is used to control the damper 166a of the air intake section 161, the damper 166b of the air circulation section 163, the damper 166c of the air discharge section 162, the fan 165, and the like. This type of computer control allows automatic control of each process; for example, aeration control is possible in the aerobic fermentation and drying device 120, and sensors can be used to monitor temperature, humidity, oxygen concentration, or carbon dioxide concentration. This makes it possible to guarantee the quality of the final product. Not only is the control of moisture content, oxygen concentration, and process variables automated and highly efficient, but it also ensures safe, uniform processing, and records of processing for each lot are kept, making it possible to prove compliance with various local government regulations.

[0086] Here, in the fermentation process by microorganisms in the aerobic fermentation drying apparatus 120 of this embodiment, first, during the initial few days, bacteria, filamentous fungi, etc. actively decompose easily decomposable organic substances in the aerobically fermented material 100, such as proteins, amino acids, and carbohydrates, thereby raising the temperature of the aerobically fermented material 100 and, by extension, the temperature inside the housing 121. When the easily decomposable substances are consumed and the temperature becomes high, thermophilic aerobic actinomycetes, etc., become involved in the decomposition of the organic matter, and the decomposition of hemicellulose and cellulose begins, and the temperature reaches a maximum of 60°C to 80°C. This high-temperature environment kills various germs, thereby sanitizing the material to be treated. Preferably, pathogenic bacteria, etc. are sterilized at 65°C or higher for 48 hours or more. Next, the medium temperature range of 30°C to 50°C is maintained to further promote the decomposition of the organic matter. After that, the amount of air taken in from the outside of the housing 121 through the air introduction section 161 is increased to promote cooling and drying.

[0087] Thus, in the aerobic fermentation drying apparatus 120 of this embodiment, decomposition and aerobic fermentation of the aerobically fermented material 100 by the aerobic microorganisms proceeds, and drying by fermentation heat and ventilation proceeds. That is, in this aerobic fermentation drying step (step S3), oxygen and the organic matter of the aerobically fermented material 100 are consumed by the aerobic microorganisms such as bacteria and filamentous fungi to produce carbon dioxide and energy (heat), and the heat generated here increases the temperature of the aerobically fermented material 100, drying the aerobically fermented material 100.

[0088] In particular, in this embodiment, the air introduction section 161 that takes in fresh air into the housing 121 of the aerobic fermentation drying apparatus 120 takes in air from the building 110 outside the housing 121 instead of outside air, and introduces it into the housing 121. At this time, in this embodiment, the air introduction section 161 and the air circulation section 163 are joined, and the air output from the upper part of the housing 121 of the air circulation section 163 is mixed with the air from the building 110 outside the housing 121, and is input from the lower part of the housing 121, and the mixed air is blown and ventilated to the aerobically fermented material 100, so that oxygen is evenly replenished inside the aerobically fermented material 100, and aerobic fermentation and drying proceed efficiently.

[0089] Here, the interior of the housing 121 is humidified by spraying water, and the temperature rises due to aerobic fermentation, so that the air output from the upper part of the housing 121 interior in the air circulation section 163 becomes humid and hot, while the air taken in from inside the building 110 outside the housing 121 interior in the air introduction section 161 is relatively dry with low humidity and temperature. Therefore, in this embodiment, the air output from the upper part of the housing 121 of the air circulation section 163 and the introduced air taken from inside the building 110 outside the housing 121 are mixed and input from the lower part of the housing 121, so that the air ventilated from below to above the aerobically fermented material 100 has a relatively lower humidity than the air output from above inside the housing 121 of the air circulation section 163. Therefore, the air ventilating the aerobically fermented material 100 allows the moisture in the aerobically fermented material 100 to evaporate, i.e., promotes drying. And the amount of moisture discharged from the air discharge section 163 can be increased.

[0090] In particular, since the air introduction section 161 takes in air from the building 110 outside the housing 121, rather than the outside air, it is less susceptible to the effects of outside air temperature compared to the outside air. That is, inside the highly airtight building 110, which is maintained at negative pressure to prevent odor leakage, it is possible to maintain a higher temperature than the outside air even in winter, and it is also possible to control the temperature to change less throughout the year compared to the outside air temperature. Therefore, even in winter, it is possible to take in relatively warm air from the building 110 into the housing 121 without taking in cold outside air, and the efficiency of the aerobic fermentation and drying treatment of the aerobic fermentation treatment material 100 loaded inside the housing 121 can be maintained even if the outside air temperature changes. That is, even in winter, the temperature difference between the open space of air inlet section 161 and the air in air circulation section 163 can be reduced, and when the air in air inlet section 161 mixes with the air output from inside housing 121, condensation of moisture is unlikely to occur, and evaporation of moisture in aerobic fermentation treatment material 100, i.e., drying, can be promoted. Also, in the case where air inlet section 161 takes in air from inside building 110 into housing 121, cold outside air is not introduced, so there is little burden on microorganisms, temperature control inside housing 121 is easy, microbial activity is unlikely to decrease, and fermentation and drying can proceed efficiently.

[0091] In the aerobic fermentation and drying apparatus 120, the aerobically fermented and dried material 200 is aerobically fermented by aerobic microorganisms and dried by the fermentation heat and aeration (air blowing). The aerobically fermented and dried material is then transported by a wheel loader 12 or the like to the post-treatment facility in the building 110 for the next sorting process (step S4). As shown in FIG. 3, in the post-treatment equipment of this embodiment, non-combustible material 230 and vinyl chloride 240 are removed by magnetic sorting, near-infrared sorting, etc., and the material is separated by particle size and weight into, for example, bulk density adjusting material 2 which is selected as a specified oversized heavy material, solid fuel raw material 210 which is selected as a specified oversized light material, and compost raw material 220 which is selected as a specified undersized fine material or fermentation residue fine material as microbial attached body 3.

[0092] For example, in the post-treatment facility of this embodiment, first, the particles are sorted by buoyancy caused by a predetermined air flow and by specific gravity, weight, and particle size using a sieve with a predetermined mesh size in a particle size and weight sorter 151. The air flow introduced into the sorter 151 at this time is led to a cyclone 152, where the dust is removed by dropping it downward with a vortex, and the air from which the dust has been removed is discharged from the top of the cyclone 152. It is also effective to use a fan to suck air on the output side of the cyclone 152.

[0093] This sorting machine 151 separates the waste into heavy materials of a specified size and above a specified weight, which mainly contain bulk density adjusting materials 2 such as large wood chips (wooden pieces), light materials of a specified size and below a specified weight, which mainly contain paper, plastic, etc., and fine materials under a specified size, which mainly contain decomposed food waste.

[0094] The heavy objects that are over a certain size and above a certain weight sorted out by the sorting machine 151 mainly contain bulk density adjusting materials 2 such as large wood chips, so after removing non-combustible materials 230 such as iron and magnetism by magnetic sorting using a magnetic sorting machine 153 or by manual sorting, the objects are returned to the bulk density adjustment yard Y3 and reused as bulk density adjusting materials 2. Furthermore, the fine granules of a certain undersize sorted by the sorter 151 are subjected to magnetic sorting by the magnetic sorter 153 to remove incombustible materials 230 such as iron and magnetism, and are then used as the compost raw material 220 and / or the fermentation residue fine granules, which are microorganism-attached material 3. That is, they may be used as the compost raw material 220, or, since the fermentation residue fine granules have many aerobic microorganisms attached thereto, they may be returned to the bulk density adjustment yard Y3 and used as the microbial-attached material 3 of seed culture. Furthermore, since the lightweight objects sorted by the sorter 151 that are of a specified size but less than a specified weight contain paper, plastic, etc., they are subjected to infrared sorting by the infrared sorter 154 to remove the vinyl chloride 240, and then become the solid fuel raw material 210.

[0095] In the solid fuel production process, the solid fuel raw material 210 is mixed with a calorific value adjusting material such as dry plastic, wood, paper, cloth, etc., crushed in a crusher, and further, non-combustible materials 230 such as iron and stone are removed, and the solid fuel is molded in a molding machine to become solid fuel 211. In the molding process, additives such as anti-corrosion agents are added as necessary. Also, odors, water vapor, etc. generated in the solid fuel production process, especially in the molding process, are sent to a biological deodorizer 140, where they are deodorized and then exhausted to the outside. The solid fuel 211 thus molded has excellent transportability and storability, is easy to handle as fuel, and can be used for multiple purposes (heating, power generation, etc.). The solid fuel source 210 can be compressed and packed using a baler (compression packing machine) to facilitate transportation to the solid fuel manufacturing process. In addition, the raw compost material 220 is matured in a separate maturation bed for several days to several weeks while being watered and aerated, as in the case of the aerobic fermentation and drying described above, and then it is sifted according to the purpose and conditions of use, and further matured if necessary, to obtain high-quality compost 221.

[0096] Incidentally, in the waste treatment plant of this embodiment, the amount of air discharged from the housing 121 room through the air discharge section 162 is set to be greater than the amount of air input into the housing 121 room through the air introduction section 161 and the air circulation section 163 in the fermentation drying apparatus 120, and by maintaining a negative pressure inside the housing 121 room, the possibility of odors escaping outside the housing 121 room is eliminated, but the air (odor) discharged from the housing 121 room through the air discharge section 162 is deodorized in the biological deodorization apparatus 140 before being exhausted to the outside.

[0097] In particular, in the waste treatment plant of this embodiment, the air exhaust section 162 which forms an air passage for the air discharged from inside the housing 121 is connected to the air plenum chamber 130, and the air in the building 110 outside the housing 121 is also introduced into the air plenum chamber 130, whereby the air discharged from inside the housing 121 is mixed with the air in the building 110 outside the housing 121. Then, the indoor air in the air plenum chamber 130 is sent to the biological deodorization device 140.

[0098] In the waste treatment plant of this embodiment, a damper 136A and a fan (not shown) are provided in the path for introducing air from inside the building 110 outside the housing 121 into the air plenum chamber 130, so that the amount of air from inside the building 110 that enters the air plenum chamber 130 can be adjusted, and the amount of air discharged from inside the housing 121 that enters the air plenum chamber 130 can also be adjusted by the damper 166c. By adjusting both of these, the humidity in the air plenum chamber 130 can be controlled to be below a predetermined level. A fan 135 and a damper 136B are provided in the air path from the air plenum chamber 130 to the biological deodorizer 140, and the air from the air plenum chamber 130 is pressurized by the fan (blower) 135 and sent to the biological deodorizer 140, and the amount of air sent from the air plenum chamber 130 to the biological deodorizer 140 can be adjusted by the damper 136C. The fan that guides air from inside the building 110 to the air plenum chamber 130 and the fan 135 that guides air from the air plenum chamber 130 to the biological deodorizer 140 may be inverter-controlled to control the rotation speed so that the rotation speed can be reduced as necessary for energy-saving operation.

[0099] When carrying out the present invention, a scrubber device 137 may be provided on the way from the air plenum chamber 130 to the biological deodorizer 140 as necessary to remove harmful substances and the like contained in the air from the air plenum chamber 130 before supplying the air to the biological deodorizer 140. Furthermore, a chemical deodorizer may be provided. In the chemical deodorizer, the gas is forced to pass through a filter medium, where water-soluble compounds contained in the gas are dissolved and absorbed by a moist biofilm covering the filter medium. The biofilm is a thin layer composed of water, polysaccharides, substances resulting from the bacterial ecosystem, and substances derived from microorganisms. When the gas in the airflow enters the biofilm, the pollutants come into contact with the microorganisms and the compounds are decomposed.

[0100] The biological deodorizing device (biofilter device) 140 constituting the deodorizing equipment to which air is introduced from the air plenum chamber 130 is usually installed outdoors in the building 110, and is configured by piling up and housing a biofilter 142 made of a carrier having aerobic microorganisms attached thereto or on which aerobic microorganisms exist in a natural state, such as wood chips, compost beds, soil, or beets, in a housing tank 141 with an open top. The biofilter 142 is preferably made of wood chips, which have moisture absorption and humidity control properties and can ensure ventilation by being packed in a prescribed size and shape. In detail, in the biological deodorizing device 140, a floor material 143 having ventilation holes is installed at a position of a predetermined height from the bottom surface of the storage tank 141 to divide the space into upper and lower parts, and a carrier such as wood chips is piled up on the floor material 143 to form a biofilter 142. Then, air from the air plenum chamber 130 is introduced into the lower space divided by the floor material 143 below the storage tank 141, passes through the ventilation holes of the floor material 143, flows from bottom to top through the biofilter 142 on which carriers such as wood chips are piled up, and is released from above the storage tank 141 into the atmosphere.

[0101] As the air input from below the storage tank 141 passes through the biofilter 142 from bottom to top, the odorous components contained in the air are consumed (decomposed and digested) through aerobic fermentation by aerobic microorganisms attached to the carriers, such as wood chips, of the biofilter 142.

[0102] In this way, the odor-laden air exhausted from the aerobic fermentation drying apparatus 120 is mixed with the intake air taken from inside the building 110 in the air plenum chamber 130, and then input into the biological deodorization apparatus (biofilter apparatus) 140, where it is biologically deodorized by the biofilter 172 and released into the atmosphere. In the biological deodorization device 140 that performs deodorization by biological digestion using aerobic microorganisms, the malodorous gas exhausted from the aerobic fermentation and drying device 120 is converted into, for example, CO 2 Or H 2 Harmless substances such as O and SO 4 - No 3 - However, no residue that requires post-treatment is generated and the product is not incinerated, so there is no CO 2 No X emissions are also kept to a minimum.

[0103] At this time, in the biological deodorizing device (biofilter device) 140, water is sprayed from above the storage tank 141 onto the biofilter 142, which is made up of an accumulation of carriers such as wood chips. This makes it possible to uniformly add and replenish the moisture necessary for the activity and growth of aerobic microorganisms attached to carriers such as wood chips that decompose and consume the odors input from below the storage tank 141, thereby achieving stable deodorizing efficiency.

[0104] In particular, in this embodiment, surplus water from watering is collected and reused for watering again. That is, in this embodiment, a second circulating water system 181 is formed in which surplus water that is sprayed from above storage tank 141 and falls to the bottom is collected and sprayed again from above storage tank 141.

[0105] Within the storage tank 141, excess water from watering flows down through the holes in the floor material 143 into the space below the floor material, from there it is discharged outside the storage tank 141 and collected in the water storage tank 183, and from the water storage tank 183 it is pressurized by a pump or the like to a spray nozzle installed on the upper side of the storage tank 141, and is sprayed as water droplets from the spray nozzle onto the biofilter 142. In addition, in the second circulating water system 181, water from the outside, such as industrial water or drinking water, can be replenished into the water storage tank 183 via a valve or the like. In this embodiment, in cases where the amount of water supplied to be sprayed inside the housing 121 chamber in the first circulating water equipment 171 is insufficient, water collected in the water storage tank 183 of the second circulating water equipment 181 can be supplied to the water storage tank 173A of the first circulating water equipment 171 via a supply path 174 equipped with a valve or the like.

[0106] In this way, the second circulating water equipment 181 supplies water to the biofilter 172 by sprinkling, and the surplus sprinkled water is discharged, collected and reused for sprinkling on the biofilter 172, thereby making it possible to replenish the moisture necessary for the fermentation and growth of aerobic microorganisms in the biofilter 172 and to equalize the moisture supply, thereby obtaining stable deodorization treatment efficiency. In particular, since the surplus water from sprinkling that has passed through the biofilter 172 and been collected contains aerobic microorganisms, the water that is sprayed as water droplets also contains aerobic microorganisms, thereby distributing the aerobic microorganisms uniformly on the biofilter 172 and improving the digestion efficiency by aerobic fermentation. In other words, the spraying of water droplets also moves the aerobic microorganisms from top to bottom, enabling efficient odor treatment. Furthermore, since excess water from sprinkling is collected and reused, the moisture required by aerobic microorganisms for stable deodorizing efficiency can be provided at low cost, and since excess water from sprinkling is not discharged to the outside, purification for drainage can be eliminated.

[0107] In addition, in the storage tank 141, the water that falls into the space between the floor material 143 and the bottom surface may be discharged by sucking it up with a pump or the like when a predetermined amount is collected and collected in the water storage tank 183, or the water may be allowed to flow into the water storage tank 183 when a predetermined amount of wastewater accumulates. In addition, by providing a passage for air that enters the space between the floor material 143 and the bottom surface in the storage tank 141 and enters the bio-filter 172 through the air vents in the floor material 143, and a passage for water that is sprayed on the bio-filter 172 and falls into the space between the floor material 143 and the bottom surface through the air vents in the floor material 143, the number of parts can be reduced, but it is also possible to configure them separately.

[0108] In particular, in this embodiment, as described above, the air discharged from inside the housing 121 of the aerobic fermentation drying apparatus 120 by the air discharge section 162 is mixed with the air outside the housing 121 in the air plenum chamber 130 and then input into the biological deodorization apparatus 140, from where it is exhausted to the outside air.

[0109] Here, the interior of the housing 121 of the aerobic fermentation drying apparatus 120 is humidified by water spraying, and the temperature rises due to aerobic fermentation, so that the air in the air exhaust section 163 discharged from the upper part of the interior of the housing 121 and input into the air plenum chamber 130 becomes hot and humid, whereas the air in the building 110 outside the housing 121 that is separately input into the air plenum chamber 130 is dry air with relatively low humidity and temperature.

[0110] Therefore, in the waste treatment plant of this embodiment, the air from the air exhaust section 162 discharged from the top of the housing 121 room and the air from the building 110 outside the housing 121 room are mixed in the air plenum chamber 130, so that the air supplied from the air plenum chamber 130 to the biological deodorization device 140 can be made to have a relatively lower humidity and temperature than the air from the air exhaust section 162 discharged from the top of the housing 121.

[0111] For this reason, in the mixed air in which the humidity has been reduced in the air plenum chamber 130, the humidity in the air is less likely to condense in the biological deodorization device 140 into which it is input, and the moisture from the humidity discharged from inside the housing 121 is less likely to be generated as exhaust water in the biological deodorization device 140 and remain as moisture in the second circulating water system 181, and the amount of moisture from the humidity discharged from inside the housing 121 is more likely to be released into the atmosphere. In other words, the amount of moisture released into the atmosphere can be increased.

[0112] Therefore, in the waste treatment plant of this embodiment, the first circulating water equipment 171 and the second circulating water equipment 172 are configured so that moisture is unlikely to accumulate, and the moisture from the waste 1 can be released into the atmosphere and consumed without the need for special wastewater purification equipment, making it possible to reduce the energy costs for wastewater treatment.

[0113] Furthermore, while the building 110 is usually constructed with poor ventilation to prevent odors, it is less susceptible to the effects of outside air temperature even in winter, but the air plenum chamber 130 takes in air from inside the building 110 instead of outside air, which prevents the temperature of the air introduced into the air plenum chamber 130 from dropping even in winter, and reduces the load on the aerobic microorganisms contained in the biofilter 142 of the biological deodorizer 140 to which the mixed air from the air plenum chamber 130 is delivered, thereby preventing a decrease in deodorizing efficiency. In other words, by suppressing temperature changes in the mixed air from the air plenum chamber 130 without being greatly affected by changes in outside air temperature, the load on the aerobic microorganisms in the biofilter 142 is reduced, and deodorizing efficiency can be stabilized.

[0114] In this manner, in the waste treatment plant of this embodiment, waste 1, which is a mixture of food waste, plastic, paper, etc., is mixed with a bulk density adjusting material 2 that increases the bulk and a microbial attachment material 3 having aerobic microorganisms attached thereto, to produce an aerobically fermented material 100, which is then aerobically fermented and dried using the heat and ventilation of fermentation, thereby being recycled as a solid fuel material 210 or a compost material 220. At this time, in the waste treatment plant of this embodiment, waste 1 is treated in a building 110 that is always kept at negative pressure, and aerobic fermentation and drying of aerobically fermented waste 100 is carried out in a housing 121 that is kept at a negative pressure higher than the outside of the building in an aerobic fermentation and drying device 120 stored in the building 110, blocking the air flow from the outside to the inside of the room and preventing odor leakage. The air in the housing 121 is deodorized by passing through an air plenum room 130 and a biofilter 142 made of a carrier such as wood chips filled in a tank 141 in a biological deodorization device 140 installed outdoors, and is exhausted into the atmosphere. Therefore, there is no emission of bad odors and no uncontrollable odor leakage.

[0115] In particular, in this embodiment, in the bulk density adjustment work section Y3 where the bulk density adjustment step (step S2) is performed, broken bag waste 1, bulk density adjuster 2 such as wood chips or solid fuel of a predetermined size and shape, and microorganism-adhering material 3 such as fermentation residue fine granules are charged into a mixer 15, and a load of 2000 kg / m is applied to the mixture of the waste 1, bulk density adjuster 2, and microorganism-adhering material 3 using a plastic, wooden, or metal pallet or the like. 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3 The aerobic fermentation treatment product 100 was prepared by adjusting the temperature to be within the following range. Manufacturing The aerobically fermented material 100 is then aerobically fermented and dried in an aerobic fermentation and drying apparatus 120 .

[0116] Here, if the bulk density of the material to be aerobically fermented is too high, the amount of ventilation is reduced and the activity of aerobic microorganisms is poor due to lack of oxygen, and aerobic fermentation does not progress, resulting in poor treatment efficiency. In particular, the lower part of the aerobically fermented material 100 piled up inside the housing 121 of the aerobic fermentation and drying device 120 is compressed and crushed by the weight of the upper part, which reduces ventilation, making it easy for fermentation to be insufficient, and the material to be treated becomes a high-water content lump without being broken down into small pieces, making it unsuitable as a raw material for solid fuel or compost and requiring another aerobic fermentation treatment. In particular, when a large amount of incombustible materials is mixed, the treatment efficiency is poor. Furthermore, not only will efficient treatment become impossible, but anaerobic bacteria will start to work, producing fatty acids, ammonia, hydrogen sulfide, and other malodorous substances, which may increase the load efficiency of the biological deodorization device 140. In particular, since anaerobic fermentation is often an endothermic reaction, it will take away the surrounding temperature and hinder the activation of aerobic microorganisms, resulting in poor treatment efficiency for drying the entire material. This results in poor processing efficiency and increased energy costs for fans, etc., making operation uneconomical. On the other hand, if the bulk density is too low, the efficiency of temperature rise due to fermentation heat of the aerobically fermented material 100 will decrease, resulting in poor microbial activity and poor processing efficiency of aerobic fermentation and drying. Also, excessive aeration volume will result in waste of energy.

[0117] In contrast, according to the experimental research of the present inventors, if the aerobically fermented material 100 is a mixture of waste 1, bulk density adjusting material 2 such as wood chips or solid fuel of a specified size and shape, and microbial adhesion material 3, then by applying load and pressure before fermentation, the porosity is maintained without decreasing even when the weight of water is added by watering, or even when the weight of the upper part is added to the lower part, and a moderate amount of voids are formed inside the aerobically fermented material 100, ensuring moderate ventilation, thereby preventing uneven distribution of aerobic microorganisms by equalizing the supply of oxygen and a moderate amount of moisture throughout the aerobically fermented material 100. In addition, the temperature of the aerobically fermented material 100 is efficiently increased by the fermentation heat, and even if non-combustible materials such as metals are not removed before fermentation, and the aerobically fermented and dried material can be aerobically fermented and dried in a short time without insufficient fermentation, even if non-combustible materials are mixed in.

[0118] In particular, in the bulk density adjustment work section Y3 where the bulk density adjustment step (step S2) is performed, waste 1 is mixed with bulk density adjuster 2 such as wood chips or solid fuel of a predetermined size and shape, and microbial adhering material 3, and a predetermined load is applied to the mixture, reaching a load of 2000 kg / m 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3 In the aerobic fermentation treatment material 100 adjusted as described below, even if a certain amount of non-combustible materials is mixed in because no process for removing non-combustible materials such as metals is performed before the fermentation treatment, the processing efficiency of aerobic fermentation and drying can be increased without causing insufficient fermentation, regardless of the type of waste 1.

[0119] Therefore, in the waste treatment plant of this embodiment, the aerobic fermentation treatment material 100 to be fermented and dried is adjusted to a predetermined bulk density, so that even if the process of removing non-combustible materials before the fermentation and drying process is not performed, that is, even if the process of removing non-combustible materials before the fermentation and drying process is omitted, it is possible to perform aerobic fermentation and drying in a short time without causing insufficient fermentation, and since it is only necessary to remove the non-combustible materials after the fermentation and drying process, the energy and energy cost required for the non-combustible material removal process can be reduced. Therefore, the energy and energy cost used in waste treatment can be reduced, and the amount of carbon dioxide emissions can be reduced. In addition, since it is not necessary to remove the non-combustible materials before the fermentation and drying process, the unsanitary nature of artificial selection in the removal of non-combustible materials before the fermentation process can be eliminated, and since it is only necessary to remove the non-combustible materials after the fermentation and drying process, sanitation can be ensured even if artificial selection is performed. In other words, if the aerobic fermentation and drying process material 200 after the high-temperature fermentation process is aerobically fermented and dried material, various bacteria and the like have been killed, and the material can be treated relatively hygienically. In this way, contact between the workers and the waste 1 is limited, and processing can be carried out without the workers having to touch the waste 1 before fermentation processing, which may be contaminated by bacteria, during sorting work.

[0120] In addition, in this embodiment, the aerobic fermentation drying apparatus 120, which aerobically ferments the aerobically fermented material 100, is provided with an air circulation section 163 that draws in air from above inside the housing 121 room and expels it from below as compressed air, and the air drawn in from above inside the housing 121 room is blown to the aerobically fermented material 100 together with the introduced air taken in from inside the building 110 outside the housing 121 room by the air introduction section 161, and the progress of aerobic fermentation and drying is promoted by the ventilation that pressurizes the air to the aerobically fermented material 100. In particular, the air circulation section 163 creates an air passage through which air flows from the bottom to the top in the aerobically fermented material 100 piled up inside the housing 121 of the aerobic fermentation drying apparatus 120, and by equalizing the supply of air and oxygen to the aerobically fermented material 100 without stirring the aerobically fermented material 100, it is possible to prevent uneven distribution of aerobic fermentation and increase the processing speed of the aerobic fermentation and drying of the entire aerobically fermented material 100.

[0121] In this embodiment, the air circulation section 163, which circulates air drawn in from above inside the housing 121 of the aerobic fermentation drying apparatus 120 by blowing it from below inside the housing 121, and the air introduction section 161, which takes in air from inside the building 110 into the housing 121, join together, and a mixture of the air drawn in from above inside the housing 121 by the air circulation section 163 and the introduced air taken in from inside the building 110 outside the housing 121 by the air introduction section 161 is blown from below inside the housing 121 to the aerobically fermented material 100.

[0122] Therefore, the highly humid air sucked in from above inside the housing 121 and circulated by the air circulation section 163 is mixed with the introduced air taken in from inside the building 110 outside the housing 121 by the air introduction section 161 to relatively reduce the humidity, and the mixed air with reduced humidity is supplied to the aerobically fermented material 100 from below inside the housing 121 and passes from the bottom to the top of the aerobically fermented material 100. Thus, the air passed through the aerobically fermented material 100 easily evaporates the moisture in the aerobically fermented material 100. Therefore, the processing efficiency of drying the aerobically fermented material 100 can be improved.

[0123] Moreover, in this embodiment, the air introduced into the housing 121 of the aerobic drying, fermenting and drying apparatus 120 through the air introduction section 161 is not outside air, but air from inside the building 110 which is kept at a negative pressure to increase airtightness in order to prevent odor leakage. Therefore, even when the outside temperature is low, such as in winter, relatively high temperature air is maintained without cold air being introduced into the housing 121 through the air introduction section 161. This prevents condensation from occurring due to mixing with the air from the air circulation section 163, and maintains the efficiency of moisture evaporation, i.e., the drying efficiency.

[0124] As described above, the waste treatment plant of this embodiment produces an aerobic fermentation treatment product 100 by mixing the waste 1 with the bulk-increasing bulk density adjusting material 2 and the microbial-attached material 3 having aerobic microorganisms attached thereto, and adjusting the bulk density by applying a load. Manufacturing the bulk density adjusting work section Y3 for adjusting the bulk density of the aerobically fermented material 100; an aerobic fermentation drying facility consisting of an aerobic fermentation drying device 120 for aerobically fermenting and drying the aerobically fermented material 100 within a housing 121 room in which air is introduced from the outside and discharged to the outside and maintained at a negative pressure; and a post-treatment facility consisting of a particle size and weight sorter 151, a magnetic sorter 153, an infrared sorter 154, etc. for removing non-combustible matter 230 and vinyl chloride 240 from the aerobically fermented and dried material 200 after aerobically fermenting and drying the aerobically fermented material 100, and for sorting the solid fuel material 210 and / or compost material 220.

[0125] In the aerobically fermented material 100 in which the bulk density is adjusted by mixing the waste 1 with the bulk density adjusting material 2 and the microbial adhering material 3 and applying a load, the bulk density is adjusted by applying a load and pressure before the aerobic fermentation treatment, so that even if the weight of water is added by watering during aerobic fermentation, or even if the weight of the upper part of the sediment of the aerobically fermented material 100 is added to the lower part, the aerobically fermented material 100 can ensure ventilation due to a moderate porosity. This makes it possible to equalize oxygen throughout the aerobically fermented material 100, and also prevents uneven distribution of excess moisture, thereby suppressing the activity of anaerobic microorganisms and maintaining the activation of aerobic fermentation by aerobic microorganisms. Therefore, even if the material is mixed with incombustible materials such as metals without removing them before the fermentation treatment, the aerobically fermented material 10 can be efficiently fermented uniformly and dried throughout, allowing for treatment without insufficient fermentation.

[0126] That is, in the waste treatment plant of this embodiment, the bulk density adjusting material 2 and the microbial adhering material 3 are mixed with the waste 1, and the bulk density is adjusted by applying a load to the aerobically fermented material 100. This ensures a predetermined gap inside the aerobically fermented material 100, ensuring ventilation, and thus achieving high processing efficiency of aerobic fermentation and drying without causing insufficient fermentation even without removing non-combustible materials before the fermentation drying process. In addition, since there is no need to remove non-combustible materials before the fermentation drying process, and it is only necessary to remove non-combustible materials after the fermentation drying process, the energy and energy cost required for the non-combustible material removal process can be reduced. In other words, the energy required for the fermentation drying process of the waste can be reduced even without removing non-combustible materials before the fermentation drying process, and the energy and energy cost required for the non-combustible material removal process can be reduced. Therefore, the energy and energy cost used in waste treatment can be reduced, and carbon dioxide emissions can be reduced.

[0127] In particular, the bulk density adjustment work Y3 Manufacturing Aerobic fermentation process Science is 2000kg / m 2 The bulk density when a load of 0.4 kg / m is applied 3 More than 0.6kg / m 3As long as it falls within the following range, regardless of whether the waste is general household waste or general commercial waste collected as burnable garbage, a predetermined amount of space and ventilation can be ensured inside the aerobic fermentation treatment material 10, thereby enabling efficient fermentation and drying treatment without insufficient fermentation even if no process for removing non-combustible materials is performed before the fermentation and drying treatment, i.e., with little chance of unfermented materials being produced.

[0128] Furthermore, if the bulk density adjusting material 2 is a solid fuel obtained by converting wood chips and / or the solid fuel raw material 210 into a solid fuel, it is low cost and can easily support aerobic microorganisms, and can function as a seed culture (microorganism support 3) when repeatedly reused, thereby increasing the efficiency of the aerobic fermentation treatment. In other words, it is possible to increase the treatment efficiency of the aerobic fermentation at low cost.

[0129] Furthermore, if the bulk density adjusting material 2 has a diameter within the range of 20 mm to less than 50 mm and a length within the range of 20 mm to 250 mm, a certain amount of space can be secured even at the bottom of the pile, preventing oxygen deficiency and enabling efficient fermentation and drying treatment, while also providing economical operation. Therefore, efficient treatment is possible.

[0130] In addition, in the waste treatment plant of this embodiment, the aerobic fermentation drying apparatus 120 has an air circulation section 163 which draws in air from above inside the housing 121 room and blows the drawn-in air from below inside the housing 121 room to circulate it, mixes the air circulated by the air circulation section 163 with air introduced from outside, and blows the air downward inside the housing 121 room.

[0131] Therefore, according to the waste treatment plant of this embodiment, the air circulation section 163 forms an air passage through which air flows from the bottom to the top in the aerobically fermented material 100 containing the waste 1 to be aerobically fermented and dried inside the housing 121 of the aerobic fermentation drying apparatus 120, and the processing efficiency of the fermentation and drying of the aerobically fermented material 100 can be improved by equalizing the supply of air to the aerobically fermented material 100 without stirring the aerobically fermented material 100. In particular, in the housing 121, the aerobically fermented material 100 containing the waste 1 is aerobically fermented by aerobic microorganisms, and the moisture evaporates due to the heat of fermentation and ventilation, causing the humidity to rise, and while the air sucked in from above in the housing 121 has a high humidity, the air introduced into the housing 121 from the outside has a relatively low humidity. Therefore, by combining the air sucked in from above the housing 121 and circulating it in the air circulation unit 163 with the air introduced from the outside and blowing it from below in the housing 121, air with a lower relative humidity than the air sucked in from above in the housing 121 passes through the aerobically fermented material 100 from below to above, so that the moisture in the aerobically fermented material 100 can be easily evaporated by the air passing through the aerobically fermented material 100. Therefore, the processing efficiency of aerobic fermentation and drying of the aerobically fermented material 100 can be improved at low cost.

[0132] In the waste treatment plant of this embodiment, the outside air introduced into the housing 121 of the aerobic drying, fermentation and drying apparatus 120 is air inside the building 110 that houses the aerobic fermentation and drying apparatus 120 and is maintained at negative pressure, and is therefore not easily affected by the outside air temperature. Therefore, even when the outside air temperature is low, such as in winter, air with little temperature change can be introduced without introducing cold air into the aerobic fermentation and drying apparatus 120, thereby maintaining high moisture evaporation efficiency and reducing the load on the aerobic microorganisms. Therefore, the processing efficiency of aerobic fermentation and drying of the aerobic fermentation treatment material 100 can be further improved at low cost.

[0133] In the above embodiment, the waste 1 is mixed with the bulk density adjusting material 2 for increasing the volume and the microbial support 3 having aerobic microorganisms attached thereto, and a load is applied to adjust the bulk density to produce the aerobic fermentation treatment product 100. ManufacturingThis can also be regarded as an invention of a waste treatment method comprising: a bulk density adjustment step (step S2) of aerobically fermenting the aerobically fermented material 100 in a room of the aerobic fermentation drying apparatus 120 where air is introduced from the outside and exhausted to the outside to maintain a negative pressure, and a post-treatment step (step S4) of removing non-combustible matter 230 and vinyl chloride 240 from the aerobically fermented and dried aerobically fermented material 200 after aerobically fermenting and drying the aerobically fermented material 100, and selecting the solid fuel material 210 and / or compost material 220.

[0134] In the aerobically fermented material 100 in which the bulk density is adjusted by mixing the waste 1 with the bulk density adjusting material 2 and the microbial adhering material 3 and applying a load, the bulk density is adjusted by applying a load and pressure before the aerobic fermentation treatment, so that even if the weight of water is added by watering during aerobic fermentation, or even if the weight of the upper part of the sediment of the aerobically fermented material 100 is added to the lower part, the aerobically fermented material 100 can ensure ventilation due to a moderate porosity. This makes it possible to equalize oxygen throughout the aerobically fermented material 100, and also prevents uneven distribution of excess moisture, thereby suppressing the activity of anaerobic microorganisms and maintaining the activation of aerobic fermentation by aerobic microorganisms. Therefore, even if the material is mixed with incombustible materials such as metals without removing them before the fermentation treatment, the aerobically fermented material 10 can be efficiently fermented uniformly and dried throughout, allowing for treatment without insufficient fermentation.

[0135] Therefore, in the waste treatment plant of this embodiment, the bulk density adjusting material 2 and the microbial adhering material 3 are mixed with the waste 1, and the bulk density is adjusted by applying a load to the aerobically fermented material 10. This ensures a predetermined gap inside the aerobically fermented material 10, ensuring ventilation, and thus enabling efficient fermentation and drying processes that do not cause insufficient fermentation, that is, that are less likely to produce unfermented material, even if the process of removing non-combustible materials is not performed before the fermentation and drying process. In addition, since the process of removing non-combustible materials is not required before the fermentation and drying process, and it is only necessary to remove the non-combustible materials after the fermentation and drying process, the energy and energy costs required for the non-combustible material removal process can be reduced. In other words, the energy required for the fermentation and drying process of the waste can be reduced even if the process of removing non-combustible materials is not performed before the fermentation and drying process, and the energy and energy costs required for the non-combustible material removal process can be reduced. Therefore, the energy and energy costs used in waste treatment can be reduced, and carbon dioxide emissions can be reduced.

[0136] That is, according to the waste treatment method of the present embodiment, the bulk density adjusting material 2 and the microbial adhering material 3 are mixed with the waste 1, and the bulk density is adjusted by applying a load to the aerobically fermented and dried aerobically. This ensures a predetermined gap inside the aerobically fermented material 100, ensuring ventilation, and thus achieving high processing efficiency of aerobic fermentation and drying without causing insufficient fermentation even without removing non-combustible materials before the fermentation and drying process. In addition, since there is no need to remove non-combustible materials before the fermentation and drying process, and it is only necessary to remove non-combustible materials after the fermentation and drying process, the energy and energy cost required for the non-combustible material removal process can be reduced. In other words, the energy required for the fermentation and drying process of the waste can be reduced even without removing non-combustible materials before the fermentation and drying process, and the energy and energy cost required for the non-combustible material removal process can be reduced. Therefore, the energy and energy cost used in waste treatment can be reduced, and carbon dioxide emissions can be reduced.

[0137] Furthermore, according to the waste treatment method of this embodiment, in the aerobic fermentation drying process (step S3), air inside the housing 121 is drawn in from above and circulated by blowing the drawn in air from below inside the housing 121, and the air circulated in the air circulation section 163 is mixed with air introduced from outside and blown downward inside the housing 121.

[0138] Therefore, an air passage is formed through which air flows from the bottom to the top in the aerobically fermented material 100 containing the waste 1 to be aerobically fermented and dried inside the housing 121 of the aerobic fermentation drying apparatus 120, and the processing efficiency of the fermentation and drying of the aerobically fermented material 100 can be improved by equalizing the supply of air to the aerobically fermented material 100 without stirring the aerobically fermented material 100. In particular, in the housing 121, the aerobically fermented material 100 containing the waste 1 is aerobically fermented by aerobic microorganisms, and the moisture evaporates due to the heat of fermentation and ventilation, causing the humidity to rise, and while the air sucked in from above in the housing 121 has a high humidity, the air introduced into the housing 121 from the outside has a relatively low humidity. Therefore, by combining the air sucked in from above the housing 121 and circulating it in the air circulation unit 163 with the air introduced from the outside and blowing it from below in the housing 121, air with a lower relative humidity than the air sucked in from above in the housing 121 passes through the aerobically fermented material 100 from below to above, so that the moisture in the aerobically fermented material 100 can be easily evaporated by the air passing through the aerobically fermented material 100. Therefore, the processing efficiency of aerobic fermentation and drying of the aerobically fermented material 100 can be improved at low cost.

[0139] According to the waste treatment method of this embodiment, in the aerobic fermentation drying step (step S3), the outside air introduced into the housing 121 of the aerobic fermentation drying apparatus 120 is air from inside the building 110 that houses the aerobic fermentation drying apparatus 120 and is maintained at negative pressure, and is therefore not easily affected by the outside air temperature. Therefore, even when the outside air temperature is low, such as in winter, air with little temperature change can be introduced without introducing cold air into the aerobic fermentation drying apparatus 120, thereby maintaining high moisture evaporation efficiency and reducing the load on the aerobic microorganisms. Therefore, the processing efficiency of aerobic fermentation and drying of the aerobic fermentation treatment material 100 can be further improved at low cost.

[0140] In the above aerobic fermentation, the explanation has been given on the assumption that aerobic microorganisms are used. However, this does not mean that there is no adhesion of anaerobic microorganisms, but rather that an environment in which aerobic microorganisms can work is created. In carrying out the present invention, the configuration, ingredients, blending, manufacturing method, etc. of the waste treatment plant and the waste treatment method are not limited to those in the above examples. In addition, the numerical values ​​given in the embodiments and examples of the present invention do not all indicate critical values, and some numerical values ​​indicate suitable values ​​for carrying out the invention, so that even if the numerical values ​​are slightly changed within the allowable values, the implementation of the invention is not denied. [Explanation of symbols]

[0141] 1. Waste 2 Bulk density adjuster 3. Microbial adhesion 100 Aerobic fermentation treatment material 110 Building 120 Aerobic fermentation and drying equipment 130 Air Plenum Room 140 Biological deodorizer 142 Biofilter 171 First Circulating Water Facility 181 Second Circulating Water Facility 200 Aerobic fermentation and drying treatment product 210 Solid fuel raw materials 220 Compost raw material Y3 Bulk density adjustment yard (bulk density adjustment work area)

Claims

1. A bulk density adjusting work unit that mixes waste with a bulk density adjusting material for forming voids in the waste sediment to increase the bulk and a microbial adhering material having aerobic microorganisms attached thereto, and adjusts the bulk density by applying a load to produce an aerobic fermentation treatment product; an aerobic fermentation and drying facility in which air is introduced from the outside and air is discharged to the outside to maintain a negative pressure in a room in which the aerobic fermentation treatment material is aerobically fermented and dried; a post-treatment facility for removing incombustible matter and vinyl chloride from the aerobically fermented and dried product after the aerobically fermented and dried product, and for selecting a solid fuel material and / or a compost material; Equipped with The bulk density adjuster has a diameter in the range of 20 mm or more and less than 50 mm, and a length in the range of 20 mm or more and 250 mm or less, A waste treatment plant, characterized in that the aerobically fermented material produced in the bulk density adjustment working section has a bulk density in the range of 0.4 kg / m 3 to 0.6 kg / m 3 when a load of 2000 kg / m 2 is applied thereto.

2. 2. The waste treatment plant according to claim 1, wherein the bulk density adjusting material is wood chips and / or solid fuel obtained by converting the solid fuel raw material into a solid fuel.

3. The waste treatment plant according to claim 1 or 2, characterized in that the aerobic fermentation drying equipment has an air circulation section that draws in air from above in the room where the aerobically fermented material is being aerobically fermented and blows the drawn air from below the room to circulate the air, and mixes the air circulated in the air circulation section with air introduced from the outside and blows the air from below the room.

4. 4. The waste treatment plant according to claim 1, wherein the outside air introduced into the room of the aerobic fermentation and drying facility is air within a building housing the aerobic fermentation and drying facility.

5. A bulk density adjusting step of mixing waste with a bulk density adjusting material for forming voids in the waste sediment to increase the bulk and a microbial adhering material having aerobic microorganisms attached thereto, and adjusting the bulk density by applying a load to produce an aerobic fermentation treatment product; an aerobic fermentation and drying process in which the waste is aerobically fermented and dried in a room where air is introduced from the outside and exhausted to the outside and maintained at a negative pressure; a post-treatment step of removing incombustible matter and vinyl chloride from the aerobically fermented and dried product after the aerobically fermented and dried product, and selecting a solid fuel material and / or a compost material; Equipped with The bulk density adjuster mixed in the bulk density adjusting step has a diameter in the range of 20 mm or more and less than 50 mm, and a length in the range of 20 mm or more and 250 mm or less, A waste treatment method, wherein the aerobically fermented product prepared in the bulk density adjusting step has a bulk density in the range of 0.4 kg / m 3 to 0.6 kg / m 3 when a load of 2000 kg / m 2 is applied thereto.

6. 6. The waste treatment method according to claim 5, wherein the bulk density adjusting material mixed in the bulk density adjusting step is wood chips and / or solid fuel obtained by treating the solid raw material as a solid fuel.

7. 7. The waste treatment method according to claim 5 or 6, characterized in that in the aerobic fermentation and drying process, air in a room where the waste is aerobically fermenting is sucked in from above, and the sucked air is blown from below the room to circulate the air, and the circulated air is mixed with air introduced from the outside and blown from below the room.

8. 8. A waste treatment method according to claim 5, wherein in the aerobic fermentation and drying process, the outside air introduced into the room in which the waste is aerobically fermenting is air within a building that contains the room.

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