Resource recycling device

Abstract

To provide a resource recycling device capable of efficiently performing treatment of persistent residues with a simple structure.SOLUTION: A resource recycling device includes a treatment device body 10 for performing fermentation treatment of raw garbage G and a wastewater sludge treatment part 70 for treating wastewater sludge generated by the treatment device body 10. The treatment device body 10 includes a raw garbage fermentation tank 1 for storing the raw garbage G, an agitator 2 for agitating the raw garbage G inside the raw garbage fermentation tank 1, a drilling part 13 provided at a bottom wall part of the garbage fermentation tank 1 with a plurality of first holes 13a for dropping the wastewater sludge generated in the raw garbage fermentation tank 1 downward to the raw garbage fermentation tank 1 formed, a gutter part 31 for collecting the wastewater sludge dropped through the first holes 13a to be sent to a wastewater sludge treatment part 70, and a punching plate 6 detachably attached to a surface of the drilling part 13 from an inner side of the raw garbage fermentation tank 1 and having a plurality of second holes 6a having a diameter smaller than that of the first holes 13a.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a resource recycling device for a food waste processing machine system that specializes in biodegrading food waste (including nutritious food residues) and periodically collecting, transporting, and recycling the decomposed sludge. More specifically, the present invention relates to a resource recycling device that can improve the efficiency of food waste processing by removing liquid generated from food waste contained inside a fermentation tank. [Background technology]

[0002] Conventionally, there is known a food waste treatment device that includes a food waste fermentation tank for storing food waste and fermenting and drying it, and a function for automatically discharging liquid generated from the food waste from the food waste fermentation tank to the outside (see, for example, Patent Document 1). The food waste treatment device of Patent Document 1 includes a perforated section at the bottom of the food waste fermentation tank and a gutter below the perforated section. The perforated section is a section in which a number of holes are formed in the bottom wall of the food waste fermentation tank so that liquid generated from the food waste can drop to the outside. The gutter is provided to collect the liquid that drops through the holes in the perforated section. According to the food waste treatment device of Patent Document 1, the liquid generated from the food waste automatically drops through the holes in the perforated section and is discharged to the outside of the food waste fermentation tank, thereby saving energy and costs for drying the food waste and reducing the generation of foul odors. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-138302 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the food waste treatment device of Patent Document 1, the diameter of the hole in the punching part was set to a predetermined size in advance. Since the punching part was provided on the bottom wall of the food waste fermentation tank, it was difficult to change the diameter of the hole that was initially set. Some food waste can be fermented until it is completely decomposed in the food waste fermentation tank. On the other hand, in the case of food waste that is a residue that has traditionally been considered difficult to decompose, such as tofu, jam, yokan, cake, and boiled eggs, there was a problem that it would fall downward from the hole in the punching part before being completely decomposed in the food waste fermentation tank. Therefore, not only was the fermentation process incomplete, but there was also a problem that the wastewater sludge collected in the gutter could not be directly discharged into the sewer. In addition, the food waste treatment device of Patent Document 1 has an aspect of being a resource recovery device that processes food waste and turns it into resources when the product generated in the fermentation process is effectively used as biomass. However, there was a problem that the quality of the product deteriorated because the structure of Patent Document 1 caused the fermentation process of food waste to be incomplete.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a resource recovery device that is capable of efficiently treating persistent residues with a simple structure. [Means for solving the problem]

[0006] The invention disclosed in this specification for solving the above-mentioned problems is configured as follows: That is, a first invention is a resource recycling apparatus including a treatment device main body for fermenting food waste and a wastewater sludge treatment device for treating wastewater sludge generated in the treatment device main body, the treatment device main body including a food waste fermenter for accommodating food waste, an agitator for agitating the food waste inside the food waste fermenter, a perforation section provided in a bottom wall section of the food waste fermenter and having a plurality of first holes for allowing wastewater sludge generated in the food waste fermenter to fall below the food waste fermenter, a gutter section for collecting the wastewater sludge that has fallen through the first holes and sending it to the wastewater sludge treatment device, and a perforation plate detachably attached to a surface of the perforation section from the inside of the food waste fermenter and having a plurality of second holes smaller in diameter than the first holes.

[0007] According to the first invention, the punching plate is detachably attached to the surface of the punching part provided on the bottom wall of the food waste fermentation tank, so that the punching plate can be interposed between the food waste in the food waste fermentation tank and the punching part. As a result, even if the diameter of the first hole of the punching part is set to a predetermined size in advance, the hole through which the food waste passes first can be the second hole having a diameter smaller than the first hole. As a result, even if the food waste is large enough to pass through the first hole, the setting can be easily changed to a second hole having a size that the food waste does not pass through by simply replacing the punching plate with a simple structure without replacing the entire food waste fermentation tank. In particular, when the food waste is a residue that has been considered difficult to decompose in the past, such as tofu, jam, yokan, cake, and boiled eggs, the fermentation treatment can be performed while the residue is sufficiently retained in the food waste fermentation tank. As a result, the difficult to decompose residue can be brought into contact with the decomposing bacteria in the food waste fermentation tank for a long time, and the treatment can be performed efficiently with a simple structure. In addition, since the second holes in the punching plate have a smaller diameter than the first holes in the punching section, if the second holes are formed at a high density, the punching plate will become weak in terms of strength, but this is not a problem as the punching plate can be easily replaced.

[0008] In the second invention, in the first invention, the agitator comprises a rotating shaft that rotates by the power of a motor, and a plurality of agitating blades attached to the rotating shaft inside the food waste fermentation tank, and the agitating blades have a blade body and a support rod portion whose tip portion supports the blade body and whose base end portion is attached freely detachably to the rotating shaft.

[0009] According to the second aspect of the invention, since a plurality of stirring blades are provided inside the food waste fermentation tank, the stirring blades, which get in the way when a person tries to move their hand from the top opening of the food waste fermentation tank to the punching part at the bottom, can be removed. By removing the stirring blades, a person can easily move their hand from the top opening of the food waste fermentation tank to the punching part at the bottom, and therefore the work of replacing the punching plate attached to the punching part can be easily performed.

[0010] In the third invention, in the first or second invention, the treatment device main body has a main body discharge outlet for discharging the wastewater sludge collected in the gutter section to the outside, and the wastewater sludge treatment device comprises a drainage pipe connected to the main body discharge outlet, a wastewater sludge settling tank connected to the downstream end of the drainage pipe, and a temporary wastewater sludge storage section provided in the middle of the drainage pipe, and the temporary wastewater sludge storage section comprises a storage tank in which wastewater sludge is stored, a liquid level sensor for measuring the liquid level of the wastewater sludge in the storage tank, and a supply pump for sending the wastewater sludge stored in the storage tank toward the wastewater sludge settling tank when the liquid level measured by the liquid level sensor reaches a predetermined value.

[0011] According to the third aspect of the present invention, when the wastewater sludge collected in the gutter section from the food waste fermentation tank contains not only water but also sludge, the water and sludge can be separated in the wastewater sludge settling tank of the wastewater sludge treatment unit. The water can be discharged into the sewerage pipe as the supernatant water in the wastewater sludge settling tank. In addition, the amount of wastewater sludge supplied to the wastewater sludge settling tank and the supply timing can be automatically adjusted by the wastewater sludge temporary storage section. This allows efficient treatment of the wastewater sludge generated in the food waste fermentation tank.

[0012] In the fourth invention, in the third invention, the wastewater sludge treatment device comprises a stand on which the wastewater sludge settling tank is placed, and a portable sludge tank placed in the inner space of the stand, and the wastewater sludge settling tank has a bottom discharge outlet for discharging sludge that has been settled and separated from the wastewater sludge, and is configured to store the sludge discharged from the bottom discharge outlet in the portable sludge tank.

[0013] According to the fourth invention, the sludge discharged from the wastewater sludge settling tank is stored in a portable sludge tank, so that when the sludge is moved to a location away from the wastewater sludge settling tank, it can be easily moved by the portable sludge tank. This allows the sludge to be easily loaded onto the loading section of the transport vehicle when it is transported to a biomass utilization facility by transport vehicle. Also, when the sludge in the wastewater sludge settling tank becomes full, it is not necessary to immediately transport it to the biomass utilization facility by transport vehicle, and the sludge can be transferred to multiple portable sludge tanks for temporary storage. This allows the wastewater sludge to be treated efficiently.

[0014] In the fifth invention, in the fourth invention, the wastewater sludge treatment device is characterized in that it comprises a supernatant water return pipe connecting the portable sludge tank and the wastewater sludge temporary storage section, and a return pump provided in the middle of the supernatant water return pipe and for sending supernatant water separated from sludge in the portable sludge tank to the wastewater sludge temporary storage section.

[0015] According to the fifth invention, when the sludge discharged from the wastewater sludge settling tank is stored in the portable sludge tank for a long time, the small amount of water remaining in the sludge may naturally separate as supernatant water. In this case, the supernatant water can be discharged from the portable sludge tank by the return pump. This makes it possible to avoid transporting excess water when the sludge is transported to the biomass utilization facility by a transport vehicle. This allows the wastewater sludge to be treated efficiently. Effect of the Invention

[0016] According to the resource recovery device of the present invention, the treatment of persistent residues can be carried out efficiently with a simple structure. [Brief description of the drawings]

[0017] [Figure 1] 1 is an overall configuration diagram showing a resource recovery device according to an embodiment of the present invention; [Diagram 2]FIG. 2 is a cross-sectional perspective view showing the internal structure of a processing device main body of the resource recycling device according to the embodiment. [Diagram 3] FIG. 2 is a front sectional view showing the internal structure of the processing apparatus main body of the present embodiment. [Figure 4] FIG. 2 is a side cross-sectional view showing the internal structure of the processing apparatus main body of the present embodiment. [Diagram 5] FIG. 4 is an enlarged view of a main portion of region A in FIG. [Figure 6] 1A and 1B are perspective views showing a fastening portion between a rotating shaft and a stirring blade of a stirrer provided in the processing apparatus main body of the embodiment, in which (a) is a perspective view in a fastened state, and (b) is a perspective view in an exploded state. [Figure 7] 2 is a perspective view of the internal structure of the treatment device main body of the present embodiment, as viewed from the cleaning water jetting means side. FIG. [Figure 8] FIG. 2 is a plan view showing a hole punch plate of the resource recovery device according to the embodiment. [Figure 9] 1A and 1B are side cross-sectional views illustrating the attachment of a punching plate to a punching portion of the food waste fermentation tank of this embodiment, where (a) is a side cross-sectional view before attachment and (b) is a side cross-sectional view after attachment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0019] FIG. 1 is an overall configuration diagram showing a resource recycling apparatus 100 according to an embodiment of the present invention. As shown in FIG. 1, the resource recycling apparatus 100 includes a processing apparatus main body 10 for fermenting food waste G, and a wastewater sludge processing unit 70 for processing wastewater sludge generated in the processing apparatus main body 10. The processing apparatus main body 10 is formed in a rectangular parallelepiped shape, and an input port 10a for inputting food waste G is provided in the upper wall. A control panel 10b for controlling the fermentation process is provided in the side wall of the processing apparatus main body 10. A food waste fermentation tank 1 for storing food waste G is provided inside the processing apparatus main body 10. A main body discharge port 34 for discharging the wastewater sludge generated in the food waste fermentation tank 1 to the outside of the processing apparatus main body 10 is provided in the lower part of the processing apparatus main body 10.

[0020] The wastewater sludge treatment device 70 includes a drain pipe 71 connected to the main body outlet 34, a wastewater sludge settling tank 72 connected to the downstream end of the drain pipe 71, and a wastewater sludge temporary storage section 73 provided in the middle of the drain pipe 71. The wastewater sludge temporary storage section 73 includes a storage tank 731, a liquid level sensor 732, and a supply pump 733.

[0021] The storage tank 731 is connected to the main body discharge port 34 of the treatment device main body 10 by a first drain pipe 71a. The first drain pipe 71a is connected to the upper part of the storage tank 731. The storage tank 731 is disposed so as to be at a lower height position than the height position of the food waste fermentation tank 1 of the treatment device main body 10. The storage tank 731 temporarily stores the wastewater sludge discharged from the main body discharge port 34 of the treatment device main body 10. The ceiling wall of the storage tank 731 is removable, and an air hole 731a is formed in this ceiling wall.

[0022] The liquid level sensor 732 is composed of, for example, a float-type level switch or a capacitance-type level sensor, and measures the liquid level of the wastewater sludge in the storage tank 731. The supply pump 733 is composed of, for example, an electric submersible pump, and is installed in the storage tank 731. When the liquid level measured by the liquid level sensor 732 reaches a predetermined value, the supply pump 733 sends the wastewater sludge stored in the storage tank 731 toward the wastewater sludge settling tank 72. One end of the second drain pipe 71b is connected to the discharge port of the supply pump 733. The other end of the second drain pipe 71b extends outside the storage tank 731 and is connected to the upper part of the wastewater sludge settling tank 72.

[0023] The wastewater sludge settling tank 72 is formed, for example, in a rectangular parallelepiped or cylindrical shape. The wastewater sludge settling tank 72 settles and separates the sludge portion of the wastewater sludge sent from the wastewater sludge temporary storage section 73 through the second drain pipe 71b by the supply pump 733. The wastewater sludge settling tank 72 is provided with a window section 724 for checking the internal state from the outside. The wastewater sludge settling tank 72 also has a bottom discharge port 723 for discharging the sludge that has been settled and separated from the wastewater sludge. A sewage pipe 74 is connected to the upper part of the wastewater sludge settling tank 72. The supernatant water separated in the wastewater sludge settling tank 72 is discharged into the sewer through the sewage pipe 74.

[0024] The wastewater sludge treatment device 70 includes a platform 75 on which the wastewater sludge settling tank 72 is placed, and a portable sludge tank 76 placed in the internal space of the platform 75. The platform 75 is composed of, for example, a rectangular top plate and four support legs that support the four corners of the top plate. The portable sludge tank 76 is a lightweight tank made of, for example, polyethylene and has a handle. The portable sludge tank 76 is configured so that it can be easily moved by a person to a location away from the wastewater sludge settling tank 72. The portable sludge tank 76 is disposed below the wastewater sludge settling tank 72 and is connected to the bottom discharge port 723 of the wastewater sludge settling tank 72 by a connection pipe 77. The portable sludge tank 76 stores sludge discharged from the bottom discharge port 723.

[0025] The portable sludge tank 76 stores sludge after settling in the wastewater sludge settling tank 72. Therefore, the sludge stored in the portable sludge tank 76 basically has a low moisture content. However, if the portable sludge tank 76 is left in a state for a long time, the moisture and solid content of the sludge in the portable sludge tank 76 may naturally separate. Therefore, the wastewater sludge treatment device 70 of this embodiment is equipped with a supernatant water return pipe 78 and a return pump 79. The supernatant water return pipe 78 connects the inside of the portable sludge tank 76 to the upper part of the storage tank 731 of the wastewater sludge temporary storage unit 73. The return pump 79 is provided in the middle of the supernatant water return pipe 78. The return pump 79 sends the supernatant water separated from the sludge in the portable sludge tank 76 to the wastewater sludge temporary storage unit 73.

[0026] The sludge stored in the portable sludge tank 76 can be used as biomass. The sludge in the portable sludge tank 76 is transported by a transport vehicle T to a biomass utilization facility 200 and utilized. That is, while it was transported and collected every time, by discharging the clean water biodegradation liquid, which contains less sludge than before, and collecting only the organic sludge after biodegradation treatment, it is possible to collect it once a week, which makes it possible to improve the efficiency of the collection work. Note that, although the sludge is used as biomass in this embodiment, it may also be used as compost, soil conditioner, or feed.

[0027] Next, the processing device main body 10 of the resource recycling device 100 will be described in detail. Fig. 2 is a cross-sectional perspective view showing the internal structure of the processing device main body 10 of the resource recycling device 100 according to this embodiment. Fig. 3 is a front cross-sectional view showing the internal structure of the processing device main body 10 of this embodiment. Fig. 4 is a side cross-sectional view showing the internal structure of the processing device main body 10 of this embodiment. Fig. 5 is an enlarged view of a main part of region A in Fig. 3. As shown in Figs. 2 to 5, the processing device main body 10 includes a food waste fermentation tank 1 that accommodates food waste G, an agitator 2 that agitates the food waste inside the food waste fermentation tank 1, a cleaning water spraying means 4, and a punching plate 6.

[0028] The food waste fermentation tank 1 has a semicircular bottom, into which food waste G is fed through an inlet 10a and stirred, dried, and fermented. The bottom wall of the food waste fermentation tank 1 is provided with a perforated section 13 having a plurality of first holes 13a formed therein. The plurality of first holes 13a are provided to allow wastewater sludge generated from the food waste G in the food waste fermentation tank 1 to fall downward in the food waste fermentation tank 1. A gutter section 31 is provided below the perforated section 13. The gutter section 31 is provided to collect the wastewater sludge that falls through the first holes 13a of the perforated section 13 and send it to the wastewater sludge treatment section 70.

[0029] The agitator 2 includes a motor 25, a rotating shaft 21 that rotates by the power of the motor 25, a belt 26 that transmits the rotational driving force of the motor 25 to the rotating shaft 21, and agitating blades 22 attached to the rotating shaft 21 in the food waste fermentation tank 1. The rotating shaft 21 is provided so as to cross the center of the food waste fermentation tank 1. The rotating shaft 21 is provided so as to penetrate the first side wall portion 11 and the second side wall portion 12 of the food waste fermentation tank 1. Both ends of the rotating shaft 21 are rotatably supported by a first bearing portion 23 provided on the outside of the first side wall portion 11 and a second bearing portion 24 provided on the outside of the second side wall portion 12. The agitating blades 22 agitate the food waste G contained in the food waste fermentation tank 1 while rotating together with the rotating shaft 21. The agitating blades 22 include a blade body 221 and a support rod portion 222. The tip end of the support rod portion 222 supports the blade main body 221. In addition, the base end of the support rod portion 222 is attached to the rotation shaft 21.

[0030] When the rotating shaft 21 is viewed from the side, the agitating blades 22 are arranged with multiple blade bodies 221 so as to intersect with the rotating shaft 21 at the upper and lower parts inside the food waste fermentation tank 1. When the rotating shaft 21 is viewed from the axial direction, as shown in Fig. 4, the multiple agitating blades 22 are provided so as to be arranged radially inside the food waste fermentation tank 1. The multiple blade bodies 221 are formed in a shape that is inclined with respect to a horizontal plane parallel to the rotating shaft 21. The multiple agitating blades 22 configured in this way smoothly agitate the food waste G.

[0031] As shown in Fig. 3, the gutter section 31 is formed so as to slope downward from the first side wall section 11 side to the second side wall section 12 side of the food waste fermentation tank 1. A vertically extending connecting pipe 32 is connected to the bottom wall 31a of the gutter section 31 near the second side wall section 12. One end of an L-shaped internal drainage pipe 33 is connected to the lower end of the connecting pipe 32. Most of the internal drainage pipe 33 passes through the inside of the treatment device main body 10, but a portion of the other end of the internal drainage pipe 33 protrudes outside the treatment device main body 10 to form a main body discharge port 34.

[0032] FIG. 6 is a perspective view showing a fastening portion between the rotating shaft 21 and the stirring blade 22 of the stirrer 2 provided in the processing device main body 10 of this embodiment, (a) is a perspective view in a fastened state, and (b) is a perspective view in an exploded state. As shown in FIG. 6, in this embodiment, the base end of the support rod part 222 of the stirring blade 22 is detachably attached to the rotating shaft 21. The support rod part 222 has a main body part that has a circular cross section and extends linearly, and the main body part has two regions, a main body part 222d and an insertion part 222a. The insertion part 222a constitutes a part of the base end of the support rod part 222. At the boundary between the main body part 222d and the insertion part 222a, a stopper piece part 222b that protrudes outward from the circumferential surface of the main body part is provided. The stopper piece part 222b is curved so as to follow the circumferential surface of the rotating shaft 21 that has a circular cross section. The stopper piece 222b is provided with a pair of mounting holes 222c, 222c.

[0033] The rotating shaft 21 is formed with a pair of mounting holes 21a, 21a at each mounting position of the multiple support rod portions 222, and a support hole 21b at a middle position between the pair of mounting holes 21a, 21a. The pair of mounting holes 21a, 21a and the support hole 21b extend in a direction perpendicular to the axial direction of the rotating shaft 21 and penetrate the rotating shaft 21. When the support rod portion 222 of the agitating blade 22 is attached to the rotating shaft 21, the insertion portion 222a of the support rod portion 222 is inserted into the support hole 21b of the rotating shaft 21, and the insertion position of the support rod portion 222 and the orientation of the blade body 221 are easily determined by the stopper piece portion 222b. Once the support rod portion 222 has been positioned relative to the rotating shaft 21, bolts 223, 223 are passed through a pair of mounting holes 222c, 222c of the stopper piece portion 222b and a pair of mounting holes 21a, 21a of the rotating shaft 21, and the agitator blade 22 is fixed to the rotating shaft 21 by fastening them using washers 224, 224 and nuts 225, 225.

[0034] When the agitator blade 22 is rotated integrally with the rotating shaft 21, the rotating shaft 21 can support the agitator blade 22 at the insertion portion 222a with sufficient strength against the force applied to the agitator blade 22. In addition, the agitator blade 22 can be easily removed from the rotating shaft 21 by releasing the fastening state of the bolts 223, 223, the washers 224, 224, and the nuts 225, 225.

[0035] FIG. 7 is a perspective view of the internal structure of the treatment device main body 10 of this embodiment as viewed from the cleaning water jetting means 4. As shown in FIGS. 3 and 7, the cleaning water jetting means 4 for jetting cleaning water toward the inside of the gutter 31 is provided on the first side wall 11 side of the gutter 31. The cleaning water jetting means 4 includes a nozzle 41, a cleaning water supply pipe 42, and a cleaning water supply control valve 43. The cleaning water supply control valve 43 is formed of a solenoid valve, and can supply cleaning water or interrupt the supply of cleaning water by an on / off operation. The cleaning water jetting means 4 can easily clean the bottom of the gutter 31 by jetting cleaning water from the nozzle 41.

[0036] As shown in Fig. 4 and Fig. 7, a pair of heaters 5, 5 are provided at the bottom of the food waste fermentation tank 1. The pair of heaters 5, 5 are formed, for example, of aluminum foil heaters. The heaters 5, 5 generate heat to supply thermal energy to all of the food waste G in the food waste fermentation tank 1. This makes it possible to heat the inside of the food waste fermentation tank 1 to a temperature higher than room temperature, thereby accelerating the fermentation of the food waste G.

[0037] Next, the punch plate 6 will be described. FIG. 8 is a plan view showing the punch plate 6 of the resource recycling apparatus 100 according to this embodiment. As shown in FIGS. 4, 5, and 8, the punch plate 6 is attached along the surface of the punch section 13 from the inside of the food waste fermentation tank 1. The punch plate 6 has a plurality of second holes 6a having a smaller diameter than the first holes 13a of the punch section 13. For example, the punch section 13 has first holes 13a with a hole diameter of 1.5 mm and spaced at six pitches in a metal member with a thickness of 1.5 mm. The punch plate 6 has second holes 6a with a hole diameter of 0.5 mm and spaced at two pitches in a metal member with a thickness of 0.9 mm.

[0038] The punch plate 6 is a rectangular flat plate member before being attached to the punch section 13. The punch plate 6 is curved to fit the arcuate curved surface of the punch section 13 when being attached to the punch section 13. The punch plate 6 has a large number of second holes 6a formed in a central rectangular area. The punch plate 6 has a plurality of radial mounting holes 6b along each of the two long sides. The radial mounting holes 6b are located at both radial ends of the arcuate curved surface of the punch section 13 when the punch plate 6 is attached to the punch section 13. The punch plate 6 has a plurality of axial first mounting holes 6c along one side of the two short sides. The punch plate 6 also has a plurality of axial second mounting holes 6d along the other side of the two short sides. In this embodiment, the axial first mounting holes 6c are circular holes, while the axial second mounting holes 6d are elongated holes. The first axial mounting hole portion 6c is located near the first side wall portion 11 of the food waste fermentation tank 1 when the perforated plate 6 is attached to the perforated portion 13. The second axial mounting hole portion 6d is located near the second side wall portion 12 of the food waste fermentation tank 1 when the perforated plate 6 is attached to the perforated portion 13.

[0039] 9A and 9B are side cross-sectional views for explaining the attachment of the punching plate 6 to the punching section 13 of the food waste fermentation tank 1 of this embodiment, where (a) is a side cross-sectional view before attachment and (b) is a side cross-sectional view after attachment. The punching plate 6 is detachably attached to the surface of the punching section 13. As shown in Figs. 8 and 9, when attaching the punching plate 6 to the surface of the punching section 13, a pair of band-shaped radial attachment plates 61, 61 and an axial attachment plate 62 are used. The radial attachment plate 61 has a hole formed therein that corresponds to the radial attachment hole section 6b of the punching plate 6. Furthermore, the axial attachment plate 62 has an elongated hole formed therein that corresponds to the second axial attachment hole section 6d of the punching plate 6.

[0040] When attaching the punch plate 6 to the surface of the punching section 13, first, as shown in FIG. 9(a), the flat punch plate 6 is bent to fit the curved shape of the punching section 13 of the food waste fermentation tank 1, and placed on the surface of the punching section 13. Next, the pair of radial mounting plates 61, 61 and the axial mounting plate 62 are aligned from above the placed punch plate 6, and the punch plate 6, the pair of radial mounting plates 61, 61 and the axial mounting plate 62 are fixed to the punching section 13 by fastening members not shown. In this fixed state, as shown in FIG. 9(b), the angle θ formed by the lines connecting the center of the rotating shaft 21 of the agitator 2 and both radial ends of the punch plate 6 is set to 56° to 60°. In this embodiment, the punch plate 6 can be easily replaced with a new one by removing the fastening members. Furthermore, when attaching or detaching the punching plate 6 to the surface of the punching section 13, if the stirring blade 22 is removed from the rotating shaft 21 in advance, the worker can easily reach the punching section 13 from the upper opening of the food waste fermentation tank 1, improving workability.

[0041] As described above, the resource recycling apparatus 100 according to the embodiment includes a processing apparatus main body 10 that ferments food waste G, and a wastewater sludge treatment apparatus 70 that treats wastewater sludge generated in the processing apparatus main body 10. The processing apparatus main body 10 includes a food waste fermentation tank 1 that accommodates food waste G, an agitator 2 that agitates the food waste G inside the food waste fermentation tank 1, a perforation section 13 that is provided on the bottom wall of the food waste fermentation tank 1 and has a plurality of first holes 13a formed therein for allowing the wastewater sludge generated in the food waste fermentation tank 1 to fall below the food waste fermentation tank 1, a gutter section 31 that collects the wastewater sludge that has fallen through the first holes 13a and sends it to the wastewater sludge treatment apparatus 70, and a perforation plate 6 that is detachably attached to the surface of the perforation section 13 from the inside of the food waste fermentation tank 1 and has a plurality of second holes 6a with diameters smaller than the first holes 13a.

[0042] According to the above-mentioned configuration, the punching plate 6 is detachably attached to the surface of the punching section 13 provided on the bottom wall of the food waste fermentation tank 1, so that the punching plate 6 can be interposed between the food waste G in the food waste fermentation tank 1 and the punching section 13. As a result, even if the diameter of the first hole 13a of the punching section 13 is set to a predetermined size in advance, the hole through which the food waste G passes first can be the second hole 6a having a smaller diameter than the first hole 13a. As a result, even if the food waste G is large enough to pass through the first hole 13a, the setting can be easily changed to a size of the second hole 6a that the food waste G cannot pass through by simply replacing the punching plate 6 having a simple structure without replacing the entire food waste fermentation tank 1. In particular, when the food waste G is a residue that has been conventionally considered difficult to decompose, such as tofu, jam, sweet bean paste, cake, or boiled egg, the fermentation process can be performed while the residue is sufficiently retained in the food waste fermentation tank 1. This allows the difficult-to-decompose residue to be in contact with the decomposing bacteria in the food waste fermenter 1 for a long period of time, allowing efficient processing with a simple structure. Also, because the second holes 6a of the perforation plate 6 have a smaller diameter than the first holes 13a of the perforation section 13, forming the second holes 6a at a high density would weaken the strength of the perforation plate 6, but this is not a problem because the perforation plate 6 can be easily replaced.

[0043] In the above embodiment, the agitator 2 includes a rotating shaft 21 that rotates by the power of the motor 25, and a plurality of agitating blades 22 attached to the rotating shaft 21 inside the food waste fermentation tank 1. The agitating blades 22 include a blade body 221 and a support rod portion 222 whose tip portion supports the blade body 221 and whose base portion is detachably attached to the rotating shaft 21.

[0044] According to the above configuration, since a plurality of stirring blades 22 are provided inside the food waste fermentation tank 1, the stirring blades 22, which get in the way when a person tries to move his / her hand from the top opening of the food waste fermentation tank 1 to the punching part 13 at the bottom, can be removed. By removing the stirring blades 22, a person's hand can be easily moved from the top opening of the food waste fermentation tank 1 to the punching part 13 at the bottom, so that the work of replacing the punching plate 6 attached to the punching part 13 can be easily performed.

[0045] In the above embodiment, the treatment device main body 10 has a main body outlet 34 for discharging the wastewater sludge collected in the gutter section 31 to the outside. The wastewater sludge treatment device 70 includes a drain pipe 71 connected to the main body outlet 34, a wastewater sludge settling tank 72 connected to the downstream end of the drain pipe 71, and a wastewater sludge temporary storage section 73 provided in the middle of the drain pipe 71. The wastewater sludge temporary storage section 73 includes a storage tank 731 in which the wastewater sludge is stored, a liquid level sensor 732 that measures the liquid level of the wastewater sludge in the storage tank 731, and a supply pump 733 that sends the wastewater sludge stored in the storage tank 731 toward the wastewater sludge settling tank 72 when the liquid level measured by the liquid level sensor 732 reaches a predetermined value.

[0046] According to the above configuration, when the wastewater sludge collected in the gutter section 31 from the food waste fermentation tank 1 contains not only water but also sludge, the water and sludge can be separated in the wastewater sludge settling tank 72 of the wastewater sludge treatment section 70. The water can be discharged as supernatant water from the wastewater sludge settling tank 72 into the sewage piping 74. In addition, the wastewater sludge temporary storage section 73 can automatically adjust the amount and supply timing of the wastewater sludge supplied to the wastewater sludge settling tank 72. This allows the wastewater sludge generated in the food waste fermentation tank 1 to be treated efficiently.

[0047] In the above embodiment, the wastewater sludge treatment device 70 includes a stand 75 on which the wastewater sludge settling tank 72 is placed, and a portable sludge tank 76 placed in the inner space of the stand 75. The wastewater sludge settling tank 72 has a bottom discharge port 723 for discharging sludge that has been settled and separated from the wastewater sludge. The sludge discharged from the bottom discharge port 723 is stored in the portable sludge tank 76.

[0048] According to the above configuration, since the sludge discharged from the wastewater sludge settling tank 72 is stored in the portable sludge tank 76, when the sludge is moved to a location away from the wastewater sludge settling tank 72, it can be easily moved by the portable sludge tank 76. As a result, when the sludge is transported to the biomass utilization facility 200 by the transport vehicle T, the sludge can be easily loaded onto the loading section of the transport vehicle T. Also, when the sludge in the wastewater sludge settling tank 72 becomes full, it is not necessary to immediately transport it to the biomass utilization facility 200 by the transport vehicle T, and the sludge can be transferred to the multiple portable sludge tanks 76 and temporarily stored therein. As a result, the wastewater sludge can be efficiently treated.

[0049] In addition, in the above embodiment, the wastewater sludge treatment device 70 is equipped with a supernatant water return piping 78 that connects the portable sludge tank 76 and the wastewater sludge temporary storage section 73, and a return pump 79 that is provided in the middle of the supernatant water return piping 78 and sends the supernatant water separated from the sludge in the portable sludge tank 76 to the wastewater sludge temporary storage section 73.

[0050] According to the above configuration, when the sludge discharged from the wastewater sludge settling tank 72 is stored in the portable sludge tank 76 for a long time, the small amount of water remaining in the sludge may naturally separate as supernatant water. In this case, the supernatant water can be discharged from the portable sludge tank 76 by the return pump 79. This allows the sludge to be transported without excess water when it is transported to the biomass utilization facility 200 by the transport vehicle T. This allows the wastewater sludge to be efficiently treated. In other words, the efficient recovery and fraudulent treatment can be used to resolve decarbonization and labor shortages, which are the responsibility of companies, and greatly contribute to society.

[0051] The embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. The technical scope of the present invention is not interpreted solely by the above-described embodiments, but is defined by the claims. The technical scope of the present invention includes all modifications within the scope and meaning equivalent to the claims.

[0052] For example, in the above embodiment, the stirring blade 22 of the agitator 2 is configured to be detachable from the rotating shaft 21, but the present invention is not limited to this, and the stirring blade may be configured not to be detachable from the rotating shaft. Also, in the above embodiment, the sludge discharged from the wastewater sludge settling tank 72 is configured to be stored in the portable sludge tank 76, but the present invention is not limited to this, and the sludge discharged from the wastewater sludge settling tank may be directly loaded onto a transport vehicle. [Explanation of symbols]

[0053] 1. Food waste fermentation tank 2 Mixer 6. Hole plate 6a 2nd hole 10 Processing device main body 13 Drilling part 13a 1st hole 21 Rotation axis 22 Stirring blade 25 Motor 31 Hibe 34 Main body outlet 70 Wastewater sludge treatment unit 71 Drain pipe 72 Wastewater sludge settling tank 73 Wastewater sludge temporary storage section 75 Mount 76 Portable sludge tank 78 Clear water return piping 79 Return Pump 100 Resource recycling equipment 221 Blade body 222 Support rod part 723 Bottom outlet 731 Reservoir 732 Liquid Level Sensor 733 Supply Pump G. Food waste

Claims

1. A processing device main body that ferments food waste; A wastewater sludge treatment device that treats the wastewater sludge generated in the treatment device body, The processing device body includes: a food waste fermentation tank for storing food waste; An agitator for agitating the food waste inside the food waste fermentation tank; a perforated portion provided on a bottom wall portion of the food waste fermentation tank and having a plurality of first holes formed therein for dropping wastewater sludge generated in the food waste fermentation tank downward; a gutter for collecting the wastewater sludge that has fallen through the first hole and sending it to the wastewater sludge treatment device; A punching plate is detachably attached to the surface of the punching portion from the inside of the food waste fermentation tank and has a plurality of second holes having a diameter smaller than that of the first holes. A resource recovery device.

2. The agitator is The apparatus includes a rotating shaft that is rotated by the power of a motor, and a plurality of stirring blades that are attached to the rotating shaft in the food waste fermentation tank, The stirring blade has a blade body and a support rod portion whose tip portion supports the blade body and whose base portion is detachably attached to the rotating shaft.

2. The resource recovery device according to claim 1 .

3. the treatment device main body has a main body discharge port for discharging the wastewater sludge collected in the gutter portion to the outside, The wastewater sludge treatment device comprises: A drain pipe connected to the main body outlet; a wastewater sludge settling tank connected to a downstream end of the drainage pipe; A temporary drainage sludge storage section is provided in the middle of the drainage pipe, The wastewater sludge temporary storage section includes: a storage tank in which wastewater sludge is stored; a liquid level sensor for measuring the liquid level of the wastewater sludge in the storage tank; a supply pump that sends the wastewater sludge stored in the storage tank to the wastewater sludge settling tank when the liquid level measured by the liquid level sensor reaches a predetermined value.

3. The resource recovery device according to claim 1 or 2.

4. The wastewater sludge treatment device comprises: A stand on which the wastewater sludge settling tank is placed; and A portable sludge tank is placed in the inner space of the frame, The wastewater sludge settling tank has a bottom discharge port for discharging sludge that has been settled and separated from the wastewater sludge, The sludge discharged from the bottom discharge port is stored in the portable sludge tank.

4. The resource recovery device according to claim 3.

5. The wastewater sludge treatment device comprises: A supernatant water return pipe connecting the portable sludge tank and the wastewater sludge temporary storage unit; and a return pump provided in the middle of the supernatant water return pipe and configured to send the supernatant water separated from the sludge in the portable sludge tank to the wastewater sludge temporary storage section.

5. The resource recovery device according to claim 4.

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