JP2003311244A - Apparatus for fermentation decomposition treatment of organic matter remnant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for fermentation decomposition treatment of organic matter remnants capable of evenly agitating the organic matter remnants and habitat bed materials over the entire part in a vessel in spite of a small driving power and can transfer the organic matter remnants and the habitat bed materials to the lateral direction from side to side to the vessel. <P>SOLUTION: The apparatus 1 for the fermentation decomposition treatment of the organic matter remnants is provided with a watertight vessel 2 for housing the organic matter remnants 16 and the habitat bed materials 15, rail bodies disposed in the watertight vessel 2 along the lateral direction from side to side (arrow 53 direction) of the vessel, a moving body driven to travel on the rail bodies to move within the watertight vessel to the lateral direction from side to side of the vessel, and an agitator for agitating the organic matter remnants and habitat bed materials and transferring the same to the lateral direction from side to side of the vessel. The watertight vessel 2 is a hermetic vessel and has a decompressor 101 for maintaining the interior of the watertight vessel 2 under negative pressure. The apparatus is also provided with a controller 39 for changing over the interior of the watertight vessel 2 to normal pressure to positive pressure and negative pressure by activating and controlling the decompressor 101. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for fermenting and decomposing organic matter by fermenting and decomposing organic matter residues represented by food residues and animal dung by microorganisms such as anaerobic bacteria and aerobic bacteria.

[0002]

2. Description of the Related Art Conventionally, as an organic residue fermentation decomposition apparatus of this type, a drive shaft is arranged inside a horizontally long U-shaped container or a cylindrical horizontal container, and the stirring blade is provided on the drive shaft. It is known that an object is attached and a drive shaft is rotated by a reduction motor to agitate an object to be treated and a habitat floor material for microorganisms. On the other hand, it is known that a drive shaft is arranged vertically inside a vertical cylindrical container having a vertical container cylinder center, a stirring blade is attached to this drive shaft, and the drive shaft is rotated by a reduction motor to perform stirring. There is.

[0003]

By the way, in the former case, since the drive shaft is lateral, the drive shaft must be long and thick in the case of a large apparatus. Therefore, the drive shaft may be bent by its own weight or may be twisted and distorted by the rotational force of the motor, which may lead to shaft damage in the worst case. In addition, since large power is required and it is difficult to transport a large container, there is no choice but to rely on local production, which leads to a great increase in construction cost and running cost. Also, because of the structure, most of the containers have an open upper surface, and there are few devices that can hermetically seal the container, and it is not found particularly in large devices. On the other hand, the latter is designed to feed and circulate the object to be processed vertically by rotation of the vertical shaft, so that when the apparatus is large, there is a problem that only the periphery of the stirring blade is vertically circulated and sufficient stirring cannot be performed. . On the other hand, there is also known one provided with an agitator that runs in the lateral direction of the container in a horizontally long U-shaped container. Since this traveling type agitator is designed so that the agitating blades rotate around the vertical axis, it is only necessary to feed the object to be processed up and down in the same manner as described above, and it is possible to transfer the object to the longitudinal direction of the container. However, there was a problem that the stirring efficiency was low.

The present invention has been made in view of the above-mentioned conventional problems, and it is possible to uniformly stir the organic residue and the living floor material throughout the container while using a small amount of power, and the organic residue and It is an object of the present invention to provide an organic residue fermentation and decomposition apparatus capable of transferring habitat floor materials in the longitudinal direction of the container.

[0005]

In order to achieve the above object, an apparatus for fermenting and decomposing organic matter according to the present invention is a watertight container for accommodating an organic matter residue and a habitat floor material inhabiting a microorganism decomposing the organic matter residue. A rail body disposed along the longitudinal direction of the container in the watertight container, a moving body that travels on the rail body to move in the longitudinal direction of the container inside the watertight container, and an organic substance disposed on the moving body. An agitator for agitating the residue and the habitat floor material and transferring them in the lateral direction of the container is provided.

In the above structure, the watertight container is composed of a plurality of container units divided in the container longitudinal direction.
Each container unit is configured to be removable and water-tightly connected.

In each of the above-mentioned configurations, the watertight container is constructed as an airtight container.

Further, in the structure of claim 3, a pressure reducing device for making the inside of the watertight container a negative pressure is provided.

Further, in each of the above-mentioned constitutions, a control device for controlling the operation of the pressure reducing device to switch the inside of the watertight container to normal pressure or positive pressure and negative pressure is provided.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an entire organic residue fermentation and decomposition apparatus according to an embodiment of the present invention. In the figure, an organic residue fermentation and decomposition apparatus 1 of the present embodiment includes a watertight container 2 that contains an organic residue 16 that is an object to be treated and a habitat floor material 15 for microorganisms. The watertight container 2 has a structure that does not leak the liquid received in the container. Inside the watertight container 2, a moving body 60 with a stirrer 90 (see FIGS. 4 to 6) is arranged. Examples of the organic residue 16 include food residue and livestock manure. The habitat floor material 15 is made of a material in which microorganisms that ferment and decompose the organic matter residue 16 can live. As the microorganisms to be used, those capable of fermenting and decomposing the organic residue are appropriately selected according to the type of the organic residue to be treated, and it may be either aerobic bacteria or anaerobic bacteria. Examples of the habitat floor material 15 include chaff, wood chips, sawdust, and porous ceramic chips.

The rear surface of the watertight container 2 (for convenience of explanation, the right side as viewed from the side is the rear side and the left side is the front side.
The same applies to the side views below. ), The organic residue 16 and the habitat floor material 15 carried in by the input conveyor 7
A charging port 5 is provided for charging, and the charging port 5 is a lid 6
And it is designed to be sealed by packing. At the front lower part of the side surface of the watertight container 2, there is provided a residue outlet 10 for taking out the solid residue finally left after the decomposition treatment,
The residue outlet 10 is sealed with a lid 11 and packing.

A solid-liquid separator 12 is provided at the lower front of the watertight container 2.
Is provided in communication with the inside of the container. This solid-liquid separator 1
No. 2 has a built-in filter material that allows the product solution generated by fermentation decomposition to pass through but filters out the final solid residue and the living floor material 15. The above-mentioned production liquid has water as a main component. The downstream side of the solid-liquid separation device 12 is connected to a product liquid storage tank 23 with a water level sensor 24 via a water pipe 13. The product liquid storage tank 23 is connected to the suction side of a pump 27 via a water pipe 25 having a sluice valve 26 in the middle. The drain pipe 28 on the discharge side of the pump 27 is connected to a water treatment device (not shown).
Further, the pressure reducing safety valve 8 is opened when the inside of the watertight container 2 falls below a predetermined negative pressure value to introduce outside air, and the valve is opened when the inside of the watertight container 2 exceeds a predetermined positive pressure value. A safety valve 9 for positive pressure that releases air to the outside is also provided.

Piping 1 connected to the upper front part of the watertight container 2.
The tip of 4 is connected to the three-way switching valve 21. One port of the three-way switching valve 21 communicates with the upper space of the product liquid storage tank 23 via a pipe 22. A pipe 29 is connected to the other port of the three-way switching valve 21. The tip of the pipe 29 is branched into a pipe 30 and a pipe 31. The tip of the pipe 31 is a three-way switching valve 3
It is connected with 3. One end of the three-way switching valve 33 is the suction pipe 3
It is connected via 5 to the suction side of the blower 36. The other port of the three-way switching valve 33 is connected to an air supply pipe 38 for introducing outside air. The tip of the pipe 30 is connected to the three-way switching valve 32. One end of the three-way switching valve 32 is connected to the discharge side of the blower 36 via the discharge pipe 34. The other port of the three-way switching valve 32 is connected to the exhaust pipe 37. The above-mentioned pipe 14,
Three-way switching valve 21, piping 29, piping 31, three-way switching valve 3
3, the suction pipe 35, the blower 36, the discharge pipe 34, the three-way switching valve 32, and the exhaust pipe 37 constitute a pressure reducing device 101 for making the inside of the watertight container 2 a negative pressure. It should be noted that the decompression device 101 also includes the case where the water pipe 13, the produced liquid storage tank 23, and the pipe 22 are used instead of the pipe 14.

At the lower part of the outer surface of the watertight container 2, a jacket pipe 5 connected to a hot water outflow pipe 17 and a hot water return pipe 18.
1 (see FIGS. 3 and 6 described later) is attached. The hot water outgoing pipe 17 and the hot water return pipe 18 are connected to a boiler 19. A pump 20 for sending hot water is provided in the hot water outflow pipe 17. The organic residue fermentation and decomposition apparatus 1 includes a decompression device 101, a boiler 19, a pump 20, a sluice valve 26, a pump 27, a lid 6, a lid 11, a moving body 60 (see FIG. 4 and others), and an agitator 90 (FIG. 4). The control device 39 is provided for controlling the operation (see the other). In particular,
The control device 39 has a function of controlling the operation of the decompression device 101 to switch the inside of the watertight container 2 between normal pressure or positive pressure and negative pressure.

As shown in FIGS. 2 and 3, the watertight container 2
Is a horizontally long container, and the container is in the longitudinal direction (direction of arrow 53).
It is composed of three container units 2A, 2B, 2C divided into. Each of the container units 2A, 2B, and 2C includes a U-shaped water receiving portion 40 with a top surface opened, and an upper lid portion 41 placed on the top surface of the water receiving portion 40 so as to close the opening. ing. Lateral flanges 46, 46 are provided on both sides of the upper surface of the water receiving portion 40 so as to project outward. Further, a U-shaped vertical flange 42 is provided at the front end of the water receiving portion 40,
A U-shaped vertical flange 43 is provided at the rear end. Lateral flanges 47, 47 project outward from both sides of the lower surface of the upper lid 41. An inverted U-shaped vertical flange 44 is provided at the front end of the upper lid portion 41, and an inverted U-shaped vertical flange 45 is provided at the rear end. The lateral flanges 46, 46 and the lateral flanges 47, 47 are hermetically fixed by bolts or the like with the sheet packing 50, 50 sandwiched therebetween. Thereby, the container units 2A, 2B, and 2C in which the water receiving portion 40 and the upper lid portion 41 are integrated are easily completed.

In this example, each container unit 2A, 2
The length L in the container longitudinal direction (arrow 53 direction) in B and 2C is, for example, 6 m, the diameter D (water receiving portion 40) is, for example, 1.8 m, and the height is, for example, 3.3 m. That is, each container unit 2A, 2B, 2C is sized and shaped so that it can be loaded on a vehicle such as a truck. in this way,
Since each container unit 2A, 2B, 2C is manufactured in a size that can be transported, the watertight container 2 can be assembled on site. Rail bodies 48, 48 made of H steel or the like are fixed to the inner walls on both sides of the water receiving portion 40 in each container unit 2A, 2B, 2C along the container longitudinal direction (arrow 53 direction).

In assembling the watertight container 2, first, the side plate 3 is fixed to the vertical flanges 43 and 45 of the container unit 2A with bolts or the like with the sheet packing 49 sandwiched therebetween. Vertical flanges 42, 44 of the container unit 2A
Then, the vertical flanges 43 and 45 of the container unit 2B are fixed with the sheet packing 49 sandwiched therebetween. Then, the vertical flanges 43 and 45 of the container unit 2C are fixed to the vertical flanges 42 and 44 of the container unit 2B with the sheet packing 49 sandwiched therebetween. Furthermore, the container unit 2C
The side plate 4 is fixed to the vertical flanges 42 and 44 with the sheet packing 49 sandwiched therebetween.

That is, each container unit 2A, 2B, 2
C is detachably and watertightly connected. As a result, the watertight container 2 is configured as an airtight container that allows some leakage but regulates gas inflow and outflow. The watertight container 2 has sufficient pressure resistance within a range of, for example, a pressure reduction degree of −20 kPa to a positive pressure degree of +25 kPa. Further, the watertight container 2 can be easily assembled and disassembled simply by bolting the flanges of the container units 2A, 2B, 2C. The upper lid 41 of the upper part of the unit can also be easily assembled and disassembled by tightening the flange bolts. In addition, each container unit 2
The connecting and fixing means for A, 2B and 2C and the side plates 3 and 4 is not limited to the above-described bolting, and other suitable means may be used.

Jacket pipes 51, 51 for passing hot water of about 60 ° C. are attached to the lower portions of both outer walls of the water receiving portion 40 of each container unit 2A, 2B, 2C. Adjacent container units have jacket pipes 51 that are flexible connecting pipes 5.
2 is connected. As a result, a warm water circuit is formed in the lower outer periphery of the watertight container 2. One end of the warm water circulation circuit is connected to the hot water outflow pipe 17, and the end of the warm water circulation circuit is connected to the warm water return pipe 18.

As shown in FIGS. 4, 5 and 6, the moving body 60 is formed by combining an upper frame 61 formed by combining H-shaped steel and L-shaped steel with a combination of H-shaped steel and L-shaped steel. And a pair of lower frames 62, 62 hung from the upper frame 61, and a ship-shaped casing 6 mounted on the periphery of the lower frame 62 and having a long front and rear view in a plan view.
3 and 3 as a main skeleton. Ship type casing 6
At the bottom of 3, there is provided a rotating shaft 87 that penetrates back and forth. In this example, since the equipment inside the ship type casing 63 uses water resistant parts, the penetrating portion for the rotating shaft 87 in the ship type casing 63 allows water to enter. However, a water-sealed bearing may be provided in the penetrating portion for the rotating shaft 87 to prevent water from entering the casing.

This rotating shaft 87 is used for the lower frames 62, 62.
Is rotatably supported by bearings 89, 89, 89, 89 provided on the lower surface of the. As the bearings 89, 89, 89, 89, for example, oilless bush type bearings that are resistant to both dry atmosphere and water are adopted. A set of four stirring blades 91, 91, 91, 91 are attached to the front end of the rotary shaft 87,
A set of four stirring blades 91, 91, 91, 9 is also provided at the rear end of 7.
1 is attached. A reduction motor 83 having a drive shaft 84 oriented in the front-rear direction at the rear of the upper surface of the upper frame 61.
Is installed. The sprocket 85 of the drive shaft 84 and the sprocket 88 of the rotating shaft 87 are connected by a chain 86. That is, the above four stirring blades 91, 9
1, 91, 91, rotating shaft 87, sprocket 8
8, the chain 86, the sprocket 85, the drive shaft 84, and the reduction motor 83 constitute a stirrer 90.

At the front part of the upper surface of the upper frame 61, a reduction motor 64 having a drive shaft 65 oriented in the left-right direction is installed. A driven shaft 92 oriented in the left-right direction is rotatably supported by a bearing 67 on the front surface of the upper frame 61, and traveling rollers 68, 68 are attached to both ends of the driven shaft 92, respectively. The sprocket 66a of the drive shaft 65 (the inner side of the sprocket 66 toward the surface of FIG. 4) and the sprocket 69 of the driven shaft 92 are connected by a chain 70. Support rollers 76, 76 are pivotally supported below the traveling rollers 68, 68 via bearings 75, 75, respectively. On the rear surface of the upper frame 61, a driven shaft 93 oriented in the left-right direction is rotatably supported by a bearing 71,
Traveling rollers 73, 73 are attached to both ends of the driven shaft 93, respectively. The sprocket 66 of the drive shaft 65 and the sprocket 72 of the driven shaft 93 are connected by a chain 74. Support rollers 78, 78 are rotatably supported by bearings 77, 77 below the traveling rollers 73, 73 via bearings 77, 77.

On the left and right side surfaces on the front side of the upper frame 61, support rollers 80, 80 which rotate around a vertical axis are bearings 79,
Supporting rollers 82, 82 which are pivotally supported via 79 and which rotate around the vertical axis are also provided on the left and right side surfaces on the rear side of the frame.
It is pivoted through 1,81. Traveling rollers 68,6
8, 73, 73 are mounted on the upper surface 48A of the rail body 48. The support rollers 76, 76, 78, 78 are arranged along the lower surface of the upper surface 48A so as to restrict the floating of the moving body 60. The support rollers 80, 80, 82, 82 are movable bodies 6
It is arranged along the inner side surface of the rail body 48 so as to regulate the left and right movement of 0.

As shown in FIG. 7, the stirring blade 91 is attached to the rotating shaft 87 at a twist angle O with respect to the axis thereof. The twist angle O is the organic residue 16 and the growth floor material 1
It is set to transfer 5 in the longitudinal direction of the container.
The stirring blade 91 has a radius of curvature R as shown in FIG.
Is curved. In this case, the stirring blade 91 on the front side (left side in FIGS. 4 and 5) is formed in a shape protruding in the clockwise direction and the front when viewed from the front. The rear side (right side in FIGS. 4 and 5) agitation blade 91 is formed in a shape protruding in the counterclockwise direction and rearward as viewed from the back surface. The shape of the stirring blade 91 is the organic residue 16
Also, the growth floor material 15 is sent out toward the inner wall surface of the watertight container 2 or returned toward the tube center portion of the watertight container 2.

FIG. 9 shows the stirring blade 9 on the front side of the moving body 60.
6 is a view of the front end of No. 1 from the front, showing the rotating state of the stirring blade 91 when the moving body 60 is moving forward (in the direction of arrow 54 in FIG. 5). As shown in FIG. 9A, a large number of blade projections 94A, 94A, 94 are provided on the blade side of the stirring blade 91.
A, ... Are projected at appropriate intervals. Further, as shown in (b) of the same figure, a large number of blades of the stirring blade 91 following in the rotation direction (rotation opposite to the arrow 96 of FIGS. 5 and 6) than the stirring blade 91 of (a). Wing protrusions 94B, 94
B, 94B, ... Are projected. In this case, the gap between the blade protrusions 94B, 94B is the same as the preceding blade protrusion 94.
It is arranged so as to pass through the rotation locus portion of A. This further improves the stirring efficiency.

Subsequently, the fermentation decomposition treatment of the organic residue 16 by the organic residue fermentation decomposition apparatus 1 having the above-mentioned configuration will be described. In this example, one container unit has the capacity to process 1.5 tons of organic residue 16 in one day.
Therefore, the organic residue fermentation and decomposition apparatus 1 using three container units has a processing capacity of 4.5 tons / day. First, the habitat floor material 15 is previously charged into the watertight container 2 from the charging port 5. The input amount of the habitat floor material 15 is set so that the total moisture content when mixed with the organic matter residue 16 is about 60%, and in this example, it is about three times the volume of the treated organic matter residue 16. Depending on the type of microorganism used, the watertight container 2 is kept at 25 to 40 ° C. by the warm water flowing in the jacket pipe 51. The temperature inside the watertight container 2 is controlled by driving the pump 20 by the controller 39 to adjust the circulating amount of hot water.
The starting position of the moving body 60 in the watertight container 2 is not particularly limited, but is assumed to be stopped, for example, at the central portion of the watertight container 2 in the longitudinal direction of the container. Therefore, the organic substance residue 16 is charged into the watertight container 2 from the charging port 5 using the charging conveyor 7. Then, the control device 39 drives the lid 6 with packing to seal the input port 5.

"Anaerobic operation": First, the case where the inside of the watertight container 2 is depressurized to a negative pressure to perform fermentation decomposition treatment will be described. The control device 39 drives and controls the three-way switching valve 21 to connect the pipe 14 and the pipe 29, and drives and controls the three-way switching valve 33 to connect the pipe 29 and the pipe 31 to the suction pipe 35, and the three-way switching valve. The discharge pipe 34 and the exhaust pipe 37 are communicated with each other by drivingly controlling 32. Further, the sluice valve 26 is drive-controlled to close the water pipe 25. As a result, the inside of the watertight container 2 becomes airtight.
Subsequently, the control device 39 drives the blower 36 of the pressure reducing device 101. Then, the air in the watertight container 2 passes through the pipe 14, the three-way switching valve 21, the pipe 29 (direction of arrow 97 in FIG. 1), the pipe 31, the three-way switching valve 33, the suction pipe 35, and the blower 36.
And is discharged to the outside through the discharge pipe 34, the three-way switching valve 32, and the exhaust pipe 37. Then, the pressure inside the watertight container 2 is reduced to about −10 kPa.

As a result, the inside of the watertight container 2 becomes an anaerobic atmosphere, and the anaerobic bacteria are actively activated so that the organic residue 16 can be fermented and decomposed. The degree of decompression of the watertight container 2 or the degree of positive pressure to be described later is adjusted by the control device 39 controlling the blower 36, for example, by linear output based on the output of the pressure sensor provided in the watertight container 2. The decompression device 1
In the initial stage of driving 01, the air in the product liquid storage tank 23 is sucked from the water pipe 13 into the watertight container 2 through the solid-liquid separation device 12, but after a while, the product liquid storage tank 23 is in the watertight container 2 inside. Decompression degree is the same as.

Therefore, the control device 39 drives the deceleration motor 64 of the moving body 60 to cause the front and rear traveling rollers 68, 68, 7 to move.
The upper surface 48A of the rail body 48 is driven to run by rotating 3, 73. As a result, the moving body 60 moves the inside of the watertight container 2 backward in the container longitudinal direction (direction of arrow 95 in FIGS. 4 and 5), for example, at 36 to 762 mm per minute. The traveling speed of the moving body 60 is adjusted by the inverter control by the control device 39. That is, the moving body 60 causes the stirring blades 91 to reach from one end to the other in the watertight container 2, so that the organic residue 16
And the habitat floor material 15 is evenly stirred.

Then, the control device 39 drives and controls the deceleration motor 83 of the stirrer 90 so that the front and rear two sets of the stirring blades 91 are clockwise (direction of arrow 96 in FIG. 6), for example, 0.2 to 5 rpm. Rotate with. As a result, the rear stirring blades 91, 91, 91, 91 (right side in FIG. 5) push the organic residue 16 and the habitat floor material 15 radially outward (toward the inner wall surface of the watertight container 2). As a result, the organic matter residue 16 and the habitat floor material 15 are removed from the tube center of the watertight container 2, so that the moving body 60 can easily pass through. On the other hand, the front stirring blades 91, 91, 91, 91
(Left side in FIG. 5) is organic residue 16 and habitat material 15
And scrape it inward in the radial direction (cylinder center of the watertight container 2). As a result, after passing through the moving body 60, the organic residue 16 and the habitat floor material 15 are returned to the tube center of the watertight container 2. At the same time, by the action of the twisting angle O with respect to the rotating shaft 87, all of the front and rear stirring blades 91 transfer the organic matter residue 16 and the habitat floor material 15 little by little toward the solid-liquid separation device 12 side (arrow 54 direction).

When the moving body 60 reaches the vicinity of the charging port 5 in the watertight container 2 (the right end in the watertight container 2 in FIG. 1), the control device 39 controls the deceleration motor 64 and the traveling roller 68. , 68, 73, 73 are reversed to move the moving body 60 forward (in the direction of arrow 54). At the same time, the controller 39 drives and controls the deceleration motor 83 of the stirrer 90 to reverse the two sets of front and rear stirring blades 91 counterclockwise when viewed from the front (direction opposite to the arrow 96 in FIG. 6). As a result, the moving body 6
The organic matter residue 16 and the habitat floor material 15 are extruded radially outward by the stirring blade 91 on the front end side (the left side in FIG. 5) of 0 in the traveling direction, and the stirring blade 9 on the distal side (the right side in FIG. 5) in the traveling direction.
In step 1, the organic residue 16 and the habitat floor material 15 are returned inward in the radial direction. Further, the organic matter residue 16 and the habitat floor material 15 are gradually transferred toward the input port 5 side (arrow 95 direction).

When the moving speed of the stirring blade 91 is increased and the moving body 60 travels slowly, the organic residue 16 and the habitat floor material 15 are transferred in the direction opposite to the running direction of the moving body 60. On the contrary, when the moving speed of the stirring blade 91 is slowed to move the moving body 60 fast, the organic matter residue 16 and the habitat floor material 15 hardly move and only the moving body 60 moves. That is, the rotation speed of the stirring blade 91 and the moving body 6
By appropriately adjusting the traveling speed of 0, the organic residue 16 and the habitat floor material 1 from the input port 5 side to the solid-liquid separation device 12 side or from the solid-liquid separation device 12 side to the input port 5 side.
5 can be freely transferred in the watertight container 2. Furthermore, with the stirring blade 91 stopped rotating, the moving body 60
Even when traveling, the ship-shaped casing 63 of the moving body 60 and the stirring blades 91 while the rotation is stopped can push the organic residue 16 and the habitat floor material 15 in the lateral direction of the container to transfer them.

Thus, by repeating the reciprocating movement of the moving body 60 while rotating the stirring blade 91, the organic matter residue 16 and the habitat floor material 15 are uniformly stirred in the watertight container 2, and the fermentation of the organic matter residue 16 by the anaerobic bacteria is carried out. The decomposition process is accelerated. Incidentally, the organic residue 16 was almost decomposed within 24 hours from the start of operation, and became a product liquid (suspension) mainly containing gas and water. The gas and the like are sucked out by the decompression device 101. The habitat floor material 15 and the solid residue are filtered out by the solid-liquid separation device 12, and the above-mentioned production liquid passes through the solid-liquid separation device 12 and flows down in the water pipe 13 to be stored in the production liquid storage tank 23. . CO in this product liquid
Both D and BOD were 500 ppm or less, and SS was 400 ppm or less. When the water level sensor 24 detects the upper limit of the amount of product liquid stored in the product liquid storage tank 23, the control device 39 opens the sluice valve 26 and drives the pump 27 to drain the product liquid in the product liquid storage tank 23. It is sent out from the pipe 28 to a water treatment device (not shown).

Such an anaerobic operation has a higher decomposition efficiency than that of the aerobic operation described later, and the amount of solid residue such as fish bones remaining finally is small. Moreover, the product liquid does not give off an unpleasant odor. In the depressurized operation described above, the control device 39 is operated to drive and control the three-way switching valve 21 to control the pipe 29 and the pipe 22.
(In the direction of arrow 100). As a result, the product liquid storage tank 23 is sucked from the pipe 22 (in the direction of arrow 100), so that the product liquid and the gas from the watertight container 2 can be passed through the solid-liquid separation device 12 in a short time.

"Aerobic operation": Next, the case where fermentation decomposition is carried out with the pressure inside the watertight container 2 being a positive pressure will be described. The control device 39 drives and controls the three-way switching valve 33 to communicate the air supply pipe 38 and the suction pipe 35, and drives and controls the three-way switching valve 32 to communicate the discharge pipe 34 with the pipe 30 and the pipe 29. The three-way switching valve 21 is in the same state as during anaerobic operation, and the pipe 29 and the pipe 14 communicate with each other. Then, the control device 39 drives the blower 36. Then, the outside air is the air supply pipe 3
8 is sucked by the blower 36 through the three-way switching valve 33 and the suction pipe 35. The outside air is discharged from the blower 36 and the discharge pipe 3
4, the three-way switching valve 32, the pipe 30, the pipe 29 (direction of arrow 98 in FIG. 1), the three-way switching valve 21, and the pipe 14 are blown into the watertight container 2. As a result, the inside of the watertight container 2 is +
It is pressurized to a positive pressure of about 10 kPa to form an aerobic atmosphere, and aerobic bacteria actively activate to decompose the organic residue 16. In this case, the solid-liquid separation device 12 is pushed by the positive pressure in the watertight container 2 to increase the filtration rate, and the product liquid passes through the solid-liquid separator 12 in a short time and collects in the product liquid storage tank 23. Such aerobic fermentation decomposition has a lower decomposition efficiency than that of anaerobic operation, resulting in a somewhat larger amount of solid residue and a slight fermentation odor, but both are harmless, mainly water-produced liquid and carbon dioxide gas. And is obtained. In addition, when making the inside of the watertight container 2 an aerobic atmosphere, it is not always necessary to apply a positive pressure. For example, the function of aerobic bacteria is somewhat reduced, but normal pressure may be used.

On the other hand, the organic residue 16 which could not be completely decomposed
When a large amount of the solid residue and the habitat floor material 15 are accumulated in the solid-liquid separation device 12 and the filtration capability of the solid-liquid separation device 12 is significantly reduced, the controller 39 is operated in the positive pressure operation state described above. Drive the three-way switching valve 21 to control the pipe 29 and the pipe 2.
Communicate with 2. As a result, the air sent out from the blower 36 bypasses the product liquid storage tank 23 from the pipe 22 (in the direction of arrow 99 in FIG. 1), passes through the water pipe 13, and passes through the solid-liquid separation device 1.
Blown in 2. As a result, the solid residue remaining in the solid-liquid separation device 12 and the habitat floor material 15 are pushed back into the watertight container 2. The solid residue and the habitat floor material 15 thus returned are taken out from the residue take-out port 10 with the lid 11 opened. Among them, the habitat floor material 15 is returned to the watertight container 2 and reused.

By the way, the control device 39 has a function of decomposing the organic residue 16 by alternately switching between depressurized (anaerobic) operation and positive pressure (aerobic) operation. By carrying out the fermentation decomposition treatment in both the anaerobic operation and the aerobic operation in this way, it is possible to selectively successively treat organic substances of a type that are easily decomposed by fermentation in each operation. Therefore,
The decomposition efficiency can be improved as compared with the case where the treatment is performed only in each operation. Incidentally, when the organic residue 16 is first fermented and decomposed by anaerobic operation and then switched to aerobic operation to be fermented and decomposed, it is decomposed as compared with the case where the aerobic operation is performed first and then the anaerobic operation is switched. Efficiency has improved dramatically. The operation switching timing and the switching frequency are preset in the sequence program of the control device 39.

In the above embodiment, the watertight container 2 is made airtight and then further depressurized so that the anaerobic atmosphere can be quickly and surely obtained, but the watertight container 2 is not depressurized. Even if it is made airtight and cut off from the outside, the inside of the vessel can be inevitably made an anaerobic atmosphere by the consumption of oxygen by microorganisms. On the other hand, if only the aerobic treatment is performed without using the watertight container 2 as an airtight container, the upper lid portion 41 of each container unit is removed, and the water receiving portion 40 is removed.
It is also possible to use only. The number of connected container units forming the watertight container 2 is not limited to three, and the number of units can be selected according to the required processing capacity. By the way, the present inventor has a track record of obtaining favorable results by connecting up to about eight container units. Further, in the above, an example of the decomposition extinction formula that decomposes the organic residue into liquid and gas and hardly leaves solid matter is shown, but the organic residue fermentation decomposition apparatus of the present invention is a compost manufacturing formula that keeps decomposition into compost. Needless to say, it can also be used.

[0039]

As described above in detail, according to the organic residue fermentation decomposition apparatus of the present invention, the stirrer is moved in the watertight container in the longitudinal direction of the container by the traveling of the moving body. Organic residues and habitat can be agitated from end to end. Therefore, the power required for the stirrer can be small. At the same time, the agitator can transfer the organic residue and the living floor material in the lateral direction of the container. By these combined operations, the fermentation decomposition of the organic residue is promoted.

Further, since a plurality of container units are detachably connected in a watertight manner, each container unit can be assembled and disassembled. Therefore, it is possible to select the number of container units to be used according to the required processing amount, and if it is necessary to increase or decrease the processing amount, it is possible to cope with it by adding / removing container units. Besides, if you make each container unit large enough to transport,
The watertight container can be assembled locally by transporting it with a transport vehicle.

When the watertight container is an airtight container, oxygen from the outside is blocked, so that the inside of the watertight container can be fermented and decomposed in an anaerobic atmosphere having a high decomposition efficiency. Moreover, even if an unpleasant odor is generated, the unpleasant odor gas does not leak out of the container from the watertight container.

Furthermore, since the pressure inside the watertight container is made negative by the pressure reducing device, the inside of the container can be swiftly and surely made into an anaerobic atmosphere. Moreover, even if an unpleasant odor is generated during fermentation decomposition, it is sucked by the decompression device, so that it can be quickly removed from the watertight container. Further, since the unpleasant odor is discharged only from the exhaust pipe of the decompression device, post-processing is easy.

Further, since the control device controls the operation of the pressure reducing device to switch the inside of the watertight container to normal pressure or positive pressure and negative pressure,
Both of the fermentation decomposition under an aerobic atmosphere and the fermentation decomposition under an anaerobic atmosphere can treat the organic residue with a higher decomposition efficiency.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an entire organic residue fermentation and decomposition apparatus according to an embodiment of the present invention.

FIG. 2 is a partially exploded perspective view showing a watertight container of the organic residue fermentation decomposition apparatus.

FIG. 3 is a partially cutaway side view showing the watertight container.

FIG. 4 is a partially cutaway side view showing a moving body of the organic residue fermentation and decomposition apparatus.

5 is a plan view of the moving body arranged in the watertight container, and is a view taken along the line BB in FIG.

6 is a view taken along the line AA in FIG.

FIG. 7 is an explanatory view showing an attachment angle of a stirring blade on a rotating shaft of a stirrer.

FIG. 8 is an explanatory diagram showing a curved shape of a stirring blade.

FIG. 9 (a) shows a stirring blade, and FIG. 9 (b) is (a).
It is explanatory drawing which showed the stirring blade following in the rotation direction rather than the stirring blade of FIG.

[Explanation of symbols]

1 Organic residue fermentation and decomposition equipment 2 watertight container 2A, 2B, 2C container unit 15 Habitat floor materials 16 Organic residue 21 Three-way switching valve 26 gate valve 32 three-way switching valve 33 three-way switching valve 36 Blower 39 Control device 40 Water receiver 41 Upper lid 42 Vertical flange 43 Vertical flange 44 Vertical flange 45 vertical flange 46 Horizontal flange 47 Horizontal flange 48 rail body 48A upper surface 49 sheet packing 50 sheet packing 53 arrow 54 arrow 60 moving bodies 64 deceleration motor 68 Roller 73 Traveling roller 83 Deceleration motor 90 stirrer 91 stirring blade 95 arrow 101 Pressure reducing device

Claims (5)

[Claims] 1. A watertight container for accommodating an organic residue and a habitat floor material inhabiting a microorganism that decomposes the organic residue, a rail body provided in the watertight container along the longitudinal direction of the container, and a rail body on the rail body. It comprises a moving body that drives and moves in the watertight container in the longitudinal direction of the container, and a stirrer provided in the moving body to stir the organic residue and the habitat floor material and transfer them in the longitudinal direction of the container. An organic residue fermentation and decomposition apparatus characterized by the above. 2. The organic residue fermentation according to claim 1, wherein the watertight container is composed of a plurality of container units divided in the longitudinal direction of the container, and each container unit is detachably and watertightly connected. Decomposing device. 3. The organic residue fermentation and decomposition apparatus according to claim 1 or 2, wherein the watertight container is configured as an airtight container. 4. The apparatus for fermenting and decomposing organic matter according to claim 3, further comprising a decompression device for making a negative pressure in the watertight container. 5. The apparatus for fermenting and decomposing organic matter according to claim 4, further comprising a control device for controlling the operation of the decompression device to switch the inside of the watertight container between normal pressure or positive pressure and negative pressure.