JP2009167063A - Method of composting organic waste and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of composting organic wastes which can be suitably used for saving the consumption of fossil fuels largely and for cutting down on the running cost and an apparatus therefor. <P>SOLUTION: The method of composting organic wastes comprises a maturing and fermenting step of maturing and fermenting organic wastes such as dung and kitchen garbage, a deodorizing step of recovering malodor gases occurring at the maturing and fermenting step and to deodorize the gases by adsorbing them in a deodorizer, and a pre-drying step preceding the maturing and fermenting step of vaporizing the moisture in the organic wastes using hot air produced in a hot air chamber in order to prepare the conditions suited for the fermentation. The heat source for the hot air used in the pre-drying step is the heat of combustion generated by burning the deodorizer which have lost deodorizing ability as it adsorbed the malodor gases at the deodorizing step. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a method and apparatus for composting organic waste.

Conventionally, organic waste such as livestock manure and garbage is composted and reused as fertilizer. For composting, there is a sedimentation method (a method in which organic waste is mixed with a moisture adjusting agent such as rice husk to adjust the moisture to 60-70%, and this is deposited and naturally fermented and matured), or a mechanical stirring method (A method in which organic waste is stirred while blowing hot air to perform aerobic fermentation, and water in the organic waste is evaporated and fermented by the heat of fermentation) is known (for example, Patent Document 1). reference). However, the accumulation type has a problem in that it increases the capacity and necessitates a wide storage place because the wastes and rice husks are mixed and accumulated in the excrement of livestock. Moreover, in the stirring type, a heavy oil burner for generating hot air is used, and there is a problem that a running cost is greatly increased due to a recent rise in fossil fuel.

On the other hand, although a hot air generating furnace using biomass is also well known, the biomass raw material used as fuel has a high water content of 40 to 50%, and a separate drying device is provided at the front stage of the hot air generating furnace, and the temperature is 100 to 300 ° C. If the raw material was not dried by heating at 1, it could not be ignited and burned, and fossil fuel such as heavy oil to be used for the burner was necessary to dry the raw material (see Patent Document 2).

JP 2005-231912 A JP 2006-328326 A

In view of the above problems, it is a technical object of the present invention to provide a composting method and apparatus capable of significantly reducing the use of fossil fuels and reducing running costs.

In order to solve the above-mentioned problems, the invention according to claim 1 is an aging fermentation process for subjecting organic waste such as livestock manure and garbage to an aging fermentation process, and recovering odorous gas generated in the aging fermentation process by using a deodorizing agent. A deodorization step for adsorption / deodorization treatment, and a pre-drying treatment step for adjusting the fermentation conditions by evaporating the moisture of the organic waste using hot air generated in a hot-air generating chamber in the pre-step of the aging fermentation step. An organic waste composting method comprising a deodorizer having reduced deodorizing ability after adsorbing and deodorizing odorous gas in the deodorizing step as a heat source of hot air used in the pre-drying processing step. Technical measures were taken to use the heat of combustion when burned.

Moreover, the invention according to claim 2 is characterized in that the deodorizer is made of woody biomass such as bark chips, rice husks or sawdust chips obtained by pulverizing tree bark, and as a heat source of hot air used in the drying pretreatment process, It is characterized by utilizing the heat of combustion when burning the deodorizer whose water content has decreased to less than 25% after the adsorption / deodorization process in the deodorization step.

Further, the invention according to claim 3 is characterized in that the combustion ash produced by burning the deodorizer is mixed as a moisture adjusting agent with the organic waste being treated in the pre-drying treatment step.

The invention according to claim 4 as a composting treatment apparatus is a dryer for adjusting fermentation conditions by evaporating water by stirring while blowing hot air to high-moisture organic waste such as livestock manure and garbage (2), an aging fermenter (3) for aging and fermenting low-moisture organic waste after evaporating water, and recovering odorous gas generated in the aging fermenter (3) by using a deodorizing agent An organic waste composting device equipped with a deodorizing tank (4) for adsorbing and deodorizing, wherein odor gas is introduced into the deodorizing tank (4) before the dryer (2). A biomass hot air generating furnace (5) using as a biomass fuel a deodorizing agent having reduced deodorizing ability after adsorption and deodorizing treatment is provided.

According to invention of Claim 1, the deodorizing process is used as a heat source of the hot air used in the pre-drying process used to evaporate the moisture of the organic waste using the hot air generated in the hot air generating chamber and to adjust the fermentation conditions. It uses the heat of combustion when burning a deodorant with reduced deodorizing ability after adsorbing and deodorizing odorous gas at a temperature, drying hot air at a temperature of 400 to 500 ° C. and an air volume of 23 to 25 Nm ³ / min. It is possible to supply to the pretreatment process. In the drying pretreatment process, for example, the organic waste is maintained at a temperature of about 70 to 80 ° C., and the organic waste has a moisture content of 60 to 70% at the time of charging. When the product is discharged, it can be dried so that the moisture content is reduced to 50 to 60%. If the fuel efficiency of the fuel used at this time is estimated, the amount of heat extracted as hot air at a temperature of 400 to 500 ° C. is about 10,000 MJ in a hot air generating furnace using a deodorizer made of woody biomass of 1 ton per day as a raw material. While 256 liters are required in terms of A heavy oil, the amount of A heavy oil used in the hot-air generator of the present invention is only about 1 liter because it is only energy required for ignition. About 99% or more can be saved, the use of fossil fuel can be reduced, and the running cost can be reduced.

According to the invention described in claim 2, the deodorizer is made of woody biomass such as bark chips, rice husks or sawdust chips obtained by pulverizing tree bark, and as a heat source of hot air used in the drying pretreatment process, For example, the used deodorizer has a water content of 10% and an apparent density of 200 kg / m ³ because it uses the heat of combustion of the deodorizer that has been reduced to a water content of less than 25% after adsorption / deodorization treatment in the deodorization process. It is lower than the moisture (for example, moisture 40-50%) of the biomass raw material used in a general biomass hot air generator, has good ignitability, and does not require any drying treatment in the previous process, immediately It can be used as a biomass fuel, and the running cost can be further reduced.

Furthermore, the invention according to claim 3 mixes the combustion ash produced when the deodorizer is burned with the organic waste being processed in the pre-drying treatment step as a moisture regulator, and burns the deodorizer. It is possible to effectively use the combustion ash, which is a by-product when the product is discarded, without being discarded.

Further, the invention described in claim 4 includes a drier (2) that adjusts fermentation conditions by evaporating water by stirring hot air to a high-moisture organic waste such as livestock manure and garbage, and moisture. Aged fermenter (3) for aging and fermenting low-moisture organic waste after evaporating odor, and deodorizing for recovering odorous gas generated in the aged fermenter (3) and adsorbing and deodorizing with a deodorizer An organic waste composting apparatus comprising a tank (4), wherein the odor gas is adsorbed and deodorized in the deodorizing tank (4) before the dryer (2). This is a composting device equipped with a biomass hot air generator (5) using biomass as a deodorant whose deodorizing ability has been reduced, and used deodorizer in the deodorizing tank (4) as a biomass hot air generator (5) After being burned in a biomass hot air generator (5) Combustion ash can be put into the dryer (2) for effective use as a water conditioner for organic waste during processing. By-products consisting of deodorizers and combustion ash to be disposed of can be used effectively to circulate. It becomes possible to realize a composting apparatus.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an exemplary embodiment for carrying out the invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of the composting method and apparatus of the present invention, and stirring while blowing hot air to high-moisture organic waste 1 (wet) such as livestock manure and garbage. The biaxial multi-purpose dryer 2 that evaporates moisture and adjusts the fermentation conditions, the aged fermenter 3 that aged and ferments the low-moisture organic waste 1 (dry) after evaporating the moisture, and the aging The odor gas generated in the fermenter 3 is collected and adsorbed and deodorized with a deodorizer, and is provided in a pre-process of the twin-screw multipurpose dryer 2 and fed into the twin-screw multipurpose dryer 2 In order to generate hot air, hot air is generated by using the heat obtained by burning biomass fuel such as rice husk, sawdust, and wood chips (renewable organic organic resources excluding fossil fuel). And a biomass hot-air generating furnace 5 to be generated.

The biaxial multipurpose dryer 2 includes, for example, a fermentation treatment tank 7 formed in a rectangular parallelepiped machine frame 6 as shown in FIG. 1, a rotating shaft 9 that is rotatably supported in the treatment tank 7, and A large number of stirring paddles 8, which are radially installed on the rotating shaft 9, are interposed between the treatment tank 7 and the outer shell of the machine frame 6, and are fed from the biomass hot air generating furnace 5. And a heat exchanging unit 10 that performs heat exchange between the hot air and the organic waste in the treatment tank (7). The fermentation treatment tank 7 is preferably a fermentation treatment tank 7 in which a plurality of semicylindrical drums are provided horizontally and the cross section is formed in a substantially W shape. It is preferable to mount the shaft 9 so as to be rotatable to form a biaxial treatment tank 7.
An organic waste 1 (wet) inlet 11 is provided at the top of the fermentation treatment tank 7, and a treated organic waste outlet 12 is provided below one side of the treatment tank 7. Opening and closing doors 13 and 14 formed to be openable and closable by a cylinder or the like are attached. A gear motor 15 that rotationally drives the rotary shaft 9 is provided on the other side of the processing tank 7. Moreover, the heat exchange part 10 interposed between the processing tank 7 and the outer shell of the machine casing 6 includes a bottom heat exchange part 10a provided on the bottom part 7a side of the processing tank 7, and a cross section W of the processing tank 7. It is comprised from the side part side heat exchange part 10b, 10b each provided in the both-sides surface part 7b, 7b side of a character, and it is comprised so that heat exchange with the hot air supplied from the outside of an apparatus may fully be performed. Reference numeral 16 is a hot air supply pipe for supplying hot air supplied from outside the apparatus, reference numeral 17 is a hot air discharge pipe for discharging air after passing through the heat exchanging section 10, and reference numeral 18 is a machine. It is a suction exhaust fan for introducing hot air fed from outside into the heat exchanging unit 10 and exhausting.

The biomass hot air generating furnace 4 provided in the pre-process of the biaxial multipurpose dryer 2 includes a horizontal cylindrical combustion furnace 20 built (built) using a refractory material such as refractory bricks in a machine frame 19. A gun type burner 21 for igniting the biomass fuel supplied into the combustion furnace 20, a combustion air supply pipe 22 for supplying combustion air into the combustion furnace 20, and surrounding the combustion air supply pipe 22 And a cooling pipe 23 for air-cooling the entire hot air generating furnace 4, and a fuel supply machine 24 for feeding biomass fuel into the combustion furnace 20 at one end of the combustion furnace 20. And a separation chamber 25 for collecting hot air and combustion ash generated when the biomass fuel is burned, respectively, is disposed on the other end side. A recovery hopper 26 and a discharge screw 27 for recovering the combustion ash are provided at the lower part of the separation chamber 25, and a conveying screw 28 for carrying the combustion ash out of the apparatus communicates with the downstream side of the recovery hopper 26. Has been.
On the other hand, a hood-like exhaust duct 29 for collecting hot air is provided in the upper part of the separation chamber 25, and a cyclone 30 for separating and removing fine dust from the collected hot air is provided downstream of the exhaust duct 29. Has been contacted. Reference numeral 31 denotes a blower fan that sucks air in the cooling pipe 23 and blows air into the combustion air supply pipe 22 and the exhaust duct 29, respectively, and reference numeral 32 denotes to prevent thermal deformation of the discharge screw 27. A cooling tower for passing water through the hollow portion of the discharge screw 27 for water cooling. Reference numeral 33 denotes a biomass fuel storage hopper.

An aging fermenter 3 that is provided in a subsequent process of the biaxial multipurpose dryer 2 and ripens and ferments low-moisture organic waste is, for example, a fermenter 34 and a fermenter 34 as shown in FIG. A raw material input unit 35 provided at one end for supplying raw materials, a compost carry-out unit 36 at the other end from which compost is carried out, a rotary stirrer 37 for stirring the input compost, and a building 38 or the like.
The fermenter 34 has a long groove shape made of concrete for depositing low-moisture organic waste 1 (dry), and a rail fixed along the longitudinal direction of the fermenter 34 is provided. A rotary stirrer 37 is mounted on the rail. An air supply duct 39 is laid at the bottom of the fermenter 34 to supply air to the deposited organic waste 1 (dry) and promote fermentation. A blower 40 is connected to the air supply duct 39 so that air is sent out at a predetermined pressure.
The building 38 is configured by covering the top of the fermenter 34 with a hood or the like, and in addition to keeping the fermenter 34 warm, a number of suction nozzles 41 are provided so that odorous air generated during fermentation does not go outside. Further, an exhaust pipe 43 communicating with the suction fan 42 is connected to each of the suction nozzles 41.

The deodorizing tank 4 is provided with a number of jet pipes 45 branched from the exhaust pipe 43 so that malodorous air generated in the aging fermenter 3 is fed from below the tank body 44. 44a and 44a. Then, in the tank body 44, a space is formed in the lower part with cobblestone, gravel, slats, or the like, and a deodorant 47 made of bark (wood bark chips), rice husks or sawdust chips or the like is formed thereon for about 1 ˜2 m is deposited, and malodorous air is sent into the deodorizer 47 from below, and after passing through the deposited layer, it is formed so as to be released to the atmosphere. Reference numeral 46 is a closing valve for closing the ejection pipes 45. In this deodorization tank 4, for example, if the deposition height of the deodorant 47 is about 1 m and the apparent wind speed is 2 mm / second, the time of contact between the malodorous air and the deodorant 47 is 500 seconds, and the ammonia concentration of the malodorous air If it is about 300 ppm, ammonia starts to be detected from the surface of the deodorizer 47 in about 20 days, and thereafter the deodorizing ability is lowered. If the apparent wind speed is 10 mm / second and the ammonia concentration is about 300 ppm, ammonia starts to be detected from the surface of the deodorizer 47 in about 4 days.

  FIG. 2 is a diagram schematically showing the steps of the embodiment of the present invention. In this embodiment, sewage such as human waste discharged from livestock and the like is collected by a vacuum car 48, transported to the screen unit 49 to remove waste in the sewage, and then stored in the temporary storage tank 50. Then, aeration processing is performed, and aerobic conditions are created to reduce odor. Then, purification treatment such as an activated sludge method is performed in the raw material storage tank 51, and the supernatant liquid is discharged to a river or the like, while the precipitated high moisture sludge is conveyed to the twin-screw multipurpose dryer 2 and subjected to composting treatment. It will be.

On the other hand, food residues such as raw garbage and agricultural residues such as rice straw, rice bran, rice bran, or waste rice are collected by the recovery vehicle 52 and stored in the garbage / agricultural residue storage 53, or A slight moisture adjusting agent made of sawdust chips or the like is added to adjust the moisture, and aerobic fermentation is performed. The food residue and agricultural residue that have been aerobically fermented for several days are supplied to the grinder 55 by a transporter 54 such as a wheel loader and adjusted to a certain particle size, and then transported to the same twin-screw multipurpose dryer 2 as described above. The composting process will be performed. In addition, a part of bark, sawdust chips or the like is temporarily stored in the chip storage place 56 and then used as a deodorizing agent for the deodorizing tank 4.

The sludge, food residue, and agricultural residue supplied to the twin-screw multipurpose dryer 2 are dried to a predetermined moisture by the twin-screw multipurpose dryer 2 and adjusted to fermentation conditions, and then supplied to the aging fermenter 3. Aged and fermented. And the composting processed material discharged | emitted from the aging fermenter 3 accumulates in the storage tank 58 with the transport vehicles 57, such as a wheel loader, and completes the composting processed material. The composted product fully ripe in the storage tank 58 is on standby until shipped, and when shipped as a compost product, the particle size is adjusted by the sieving device 60 when transported to the hopper 59 by the transport vehicle 57. The sized composted product is transported to a bagging device 61 provided at the product shipping site and subjected to bagging processing, and then stacked on a pallet by a robot palletizer 62 and shipped as a product. Will be.

Next, operations of the biaxial multipurpose dryer 2, the aging fermenter 3, the deodorizing tank 4, and the biomass hot air generating furnace 5, which are the main parts of the present invention, will be described with reference to FIG.

First, the operation of the biomass hot air generator 5 will be described. As described above, the deodorizer 47 made of bark chips, rice husks, sawdust chips or the like deposited in the deodorization tank 4 has a water content of 10% and an apparent density of 200 kg / m ³ when used. It is lower than the moisture content (for example, 40 to 50%) of the biomass raw material used in a fresh biomass hot air generating furnace, has good ignitability, and can be used immediately as biomass fuel in the biomass hot air generating furnace 5. When the spent deodorant 47 as fuel is supplied from the storage hopper 33, the spent deodorizer 47 is fed into the combustion furnace 20 by the fuel supply unit 24. Next, when the used deodorant 47 is ignited from the gun type burner 21, the used deodorant 47 starts to burn. On the other hand, from the lower side of the combustion furnace 20, combustion air is supplied from the air ejection holes 20a, and the combustion temperature rises as the combustion increases, and hot air of about 1000 ° C. is generated on the start end side in the combustion furnace 20. Then, the cooling pipe 23 covering the entire combustion furnace 20 is sucked by the pipe line 63 and the blower fan 31 and cooled by air, and the blower fan 31 is connected to the combustion air supply pipe 22 and the exhaust duct 29 via the pipe line 64. The air is branched and blown.

Hot air and combustion ash generated during combustion reach the separation chamber 25 at the end of the combustion furnace 20, and the combustion ash is recovered by the recovery hopper 26 and the discharge screw 27 in the separation chamber 25. The combustion ash recovered at this time can be used as a water conditioner for organic waste if supplied to the biaxial multipurpose dryer 2. On the other hand, the hot air reaching the end of the combustion furnace 20 is collected in the exhaust duct 29 at the top of the separation chamber 25. Since the hot air collected at this time is mixed with fine dust, it is supplied to the cyclone 30 via the pipe 64 to separate and remove the fine dust. Then, the fine air is separated and removed by the cyclone 30 and the hot air when passing through the hot air supply pipe 16 has a temperature of 400 to 500 ° C. and an air volume of 23 to 25 Nm ³ / min (normal lube; 0 ° C., 1 atm). Unit of gas flow rate converted into a state).

Next, the operation of the biaxial multipurpose dryer 2 will be described. When the suction exhaust fan 18 installed on the exhaust side of the twin-screw multipurpose dryer 2 is operated, hot air having a temperature of 400 to 500 ° C. and an air volume of 23 to 25 Nm ³ / min from the biomass hot air generator 5 is sucked and heated. It is sequentially introduced into the bottom heat exchange unit 10a and the side surface side heat exchange units 10b, 10b through the supply pipe 16, and heat is transferred from the heat exchange units 10a, 10b to the fermentation treatment tank 7. Moreover, while driving the gear motor 15 and rotating the stirring paddles 8 ..., the organic waste 1 (wet) with high moisture (for example, 60 to 70%) composed of the collected sludge, food residue and agricultural residue, It is charged into the fermentation treatment tank 7 from the charging port 11. Then, by the rotation, stirring, and conveying action of the stirring paddles 8..., A large lump is also pulverized and uniformed to prepare conditions that facilitate fermentation. At this time, the inside of the fermenter 7 is maintained at about 80 to 100 ° C. by heat exchange, the input organic waste 1 (wet) is maintained at about 70 to 80 ° C., and the water content is 50 to 60% when discharged. Drying is performed to dry out. The hot air that has passed through the side surface side heat exchange units 10b and 10b is exhausted to the outside of the apparatus via the suction exhaust fan 18 and the pipe 65, while a part of the exhaust is passed through the fermentation pipe 7 through the pipe 66. Will be returned directly. At this time, the hot air when exhausted from the pipe 65 has a temperature of 180 to 230 ° C. and an air volume of 19 to 22 Nm ³ / min, and the hot air returned to the fermentation treatment tank 7 by the pipe 66 has a temperature of 180 to 230 ° C. It was 230 degreeC and the air volume was ³ Nm < ³ > / min.
The code | symbol 67 is a pipe line for taking in secondary air in the fermentation treatment tank 7, This secondary air was the temperature of about 15 degreeC, and the air volume was 4 Nm < ³ > / min. Reference numeral 68 denotes an exhaust pipe for exhausting the hot air after passing into the fermentation treatment tank 7, and was an exhaust having a temperature of about 90 ° C. and an air volume of 11 Nm ³ / min.

Next, the organic waste 1 (dry) dried to 50 to 60% moisture is transferred to the aging fermenter 3. In the aging fermenter 3, the rotary stirrer 37 is operated, and the organic waste 1 (dry) accumulated in the fermenter 34 is scooped up and dropped. Thereby, the lump of the organic waste 1 (dry) is uniformly mixed while being broken into small pieces, and air permeability suitable for aerobic fermentation is imparted. And the bad odor air which arises in the case of fermentation is deodorized in the deodorizing tank 4 through the suction nozzle 41 ..., the suction fan 42, and the exhaust pipe 43 like the above.

In the composting method and apparatus as described above, if the fuel efficiency of the fuel used is estimated, hot air having a temperature of 400 to 500 ° C. is taken out in the biomass hot air generator 5 using 1 ton woody biomass as a raw material. The amount of heat required for this is about 10,000 MJ, which is 256 liters in terms of A heavy oil. On the other hand, the amount of heavy oil A used in the biomass hot air generator 5 according to the present invention is only about 1 liter because it is only energy required for ignition, and the amount of heavy oil A can be reduced by about 99% or more. It became.

It is the schematic which shows embodiment of the composting processing method and its apparatus of this invention. It is the figure which showed typically about the process of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Organic waste 2 Twin-shaft multipurpose dryer 3 Aging fermenter 4 Deodorizing tank 5 Biomass hot air generating furnace 6 Machine frame 7 Fermentation processing tank 8 Stir paddle 9 Rotating shaft 10 Heat exchange part 11 Input port 12 Outlet port 13 Opening / closing door 14 Opening and closing door 15 Gear motor 16 Hot air supply pipe 17 Hot air discharge pipe 18 Suction exhaust fan 19 Machine frame 20 Combustion furnace 21 Gun type burner 22 Combustion air supply pipe 23 Cooling pipe 24 Fuel supply machine 25 Separation chamber 26 Recovery hopper 27 Discharge screw 28 Conveying screw 29 Exhaust duct 30 Cyclone 31 Blower fan 32 Cooling tower 33 Storage hopper 34 Fermenter 35 Raw material input part 36 Compost carry-out part 37 Rotary stirrer 38 Building 39 Air supply duct 40 Blower 41 Suction nozzle 42 Suction fan 43 Exhaust pipe 44 Tank body 45 Ejection Pipe 46 Shut-off valve 47 Deodorant 48 Vacuum car 4 9 Screen unit 50 Temporary storage tank 51 Raw material storage tank 52 Recovery vehicle 53 Garbage / agricultural residue storage 54 Transport vehicle 55 Crusher 56 Chip storage 57 Transport vehicle 58 Storage tank 59 Hopper 60 Sieve device 61 Bagging device 62 Robot palletizer 63 Pipe line 64 Pipe line 65 Pipe line 66 Pipe line 67 Pipe line 68 Pipe line

Claims (6)

An aging fermentation process for aging fermentation of organic wastes such as livestock manure and garbage, a deodorization process for recovering odorous gas generated in the aging fermentation process and adsorbing and deodorizing with a deodorizer, and the aging fermentation process A pre-drying treatment step for evaporating the moisture of the organic waste using hot air generated in a hot air generation chamber in the previous step and adjusting the fermentation conditions, and a composting method for organic waste,
The heat source of hot air used in the pre-drying treatment step is characterized by using the heat of combustion when burning a deodorant having reduced deodorizing ability after adsorbing and deodorizing odor gas in the deodorization step. Method for composting organic waste. The deodorizing agent is made of woody biomass such as bark chips, rice husks or sawdust chips obtained by pulverizing the bark of a tree, and as a heat source of hot air used in the pre-drying treatment step, after adsorption / deodorization treatment in the deodorization step The composting method of the organic waste of Claim 1 formed using the heat of combustion when the deodorizing agent reduced to less than 25% of the moisture is burned.   The composting method of the organic waste of Claim 1 or 2 formed by mixing the combustion ash when burning the said deodorizer with the organic waste currently processed in the said pre-drying process as a moisture adjusting agent. Dryer (2) that stirs hot air to a high-moisture organic waste such as livestock manure and garbage and evaporates the water to adjust the fermentation conditions, and the low-moisture organic after evaporating the water Organic equipped with an aging fermenter (3) for aging fermentation of waste, and a deodorization tank (4) for recovering odorous gas generated in the aging fermenter (3) and adsorbing and deodorizing with a deodorizing agent A composting device for waste,
In the pre-process of the dryer (2), there is a biomass hot air generator (5) using as a biomass fuel a deodorant whose deodorizing ability is reduced after adsorbing and deodorizing odorous gas in the deodorizing tank (4). An organic waste composting apparatus characterized by comprising: The dryer (2) includes a treatment tank (7) formed in a rectangular parallelepiped machine frame (6), a rotary shaft (9) rotatably supported in the treatment tank (7), and the rotation A large number of agitation paddles (8...) Radially planted with respect to the shaft (9) and interposed between the treatment tank (7) and the outer shell of the machine frame (6) to generate the biomass hot air. The composting processing apparatus of Claim 4 provided with the heat exchange part (10) which performs heat exchange with the hot air supplied from a furnace (5), and the organic waste in the said processing tank (7). The biomass hot air generating furnace (4) ignites the horizontal cylindrical combustion furnace (20) built in the machine frame (19) and the biomass fuel supplied into the combustion furnace (20). A gun type burner (21), a combustion air supply pipe (22) for supplying combustion air to the inside of the combustion furnace (20), and the hot air A cooling pipe (23) for air-cooling the entire generating furnace (4), a fuel supply machine (24) for feeding biomass fuel made of the deodorizer into the combustion furnace (20), and the combustion furnace (20 ) And a recovery hopper (26) and a discharge screw (27) for recovering the combustion ash disposed in the lower part of the separation chamber (25). The hot air disposed in the upper part of the separation chamber (25) is rotated. Exhaust duct (29) and becomes comprise claim 4 or 5 composting apparatus according to.

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