Sludge treatment facility

Abstract

To provide a sludge treatment facility capable of treating sludge to produce compost.SOLUTION: A sludge treatment facility includes a storage part 202 for storing raw sludge, a mixing part 310 for mixing microorganisms with sludge transported from the storage part to produce a microorganism-mixed raw material, a fermentation part 320 for fermenting the microorganism-mixed raw material transported from the mixing part 310, a granulation part 340 for forming the fermented microbial mixed raw material into pellets, and a deodorization part for removing odors generated from the storage part 202, the mixing part 310, and the fermentation part 320.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sludge treatment facility. [Background technology]

[0002] Patent Document 1 describes an organic sludge treatment system and an organic sludge treatment facility. This organic sludge treatment facility has a crushing and mixing section that mixes powder on which microorganisms are attached at a predetermined ratio with the organic sludge that is brought in and crushes it to a required particle size, a primary storage section that stores and cures the organic sludge after crushing and mixing while turning it over, and a fermentation treatment section that stores the organic sludge after treatment in the primary storage section and ferments the organic sludge while supplying air, and the fermentation treatment section includes a plurality of sealed chamber devices that are installed side by side, and the sealed chamber devices include a sealed chamber into which the organic sludge is input and left to stand, and a heated air injection section that injects heated air into the organic sludge input into the sealed chamber. The facility is characterized by having a pipe, a suction and discharge section that sucks and discharges air containing steam generated by microbial fermentation of organic sludge, and a deodorizing section that deodorizes the sucked gas, and within one site, a crushing and mixing section and a primary storage section are arranged in opposing positions with a central transport space in between as pre-treatment sections, and multiple sealed treatment chambers of the fermentation treatment section are arranged adjacent to the crushing and mixing section and the primary storage section, respectively, and are also arranged in opposing positions with a central transport space in between, and there are eight or more sealed chambers, each with a volume at least twice the daily amount of organic sludge brought in. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4415273 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a sludge treatment facility capable of treating sludge and producing compost. [Means for solving the problem]

[0005] The invention described in claim 1 is The building is built on the ground with multiple holes arranged in a staggered pattern, each filled with binchotan charcoal kneaded with water. Storage area for storing sludge as raw material Storage building with and, A building located on the opposite side of the road from the storage building, with entrances at both ends and a passageway formed inside that extends from one entrance to the other and through which wheel loaders can travel; A mixing unit for mixing microorganisms with the sludge transported from the storage unit to produce a microbial mixed raw material. a fermentation unit, and at least ten fermentation units arranged opposite each other across the passage; The microbial mixed raw material transported from the mixing section 7 to 10 days Ferment Generate compost Fermentation to a sorting section having a trommel into which the compost produced in the fermentation section is input and which sorts the compost into pelletizable compost and other compost; A pelletizing section that forms the powder into pellets and a deodorizing section that removes odors generated from the storage section, the mixing section, and the fermentation section; Processing building equipped with and, a sludge treatment facility in which the fermentation section has a floor surface that receives the microorganism-mixed raw material, side walls that surround the floor surface, a roof that covers the upper part of the floor surface, and a door that opens and closes in the vertical direction, and a portion of the side walls, the roof, and the door are each made of tempered glass, allowing light to enter the inside of the fermentation section, a peak is formed on the roof, and an exhaust port is provided inside the peak for discharging generated odors to the deodorizing section, and the microorganism-mixed raw material is transported into the fermentation section through the door by the wheel loader. It is a sludge treatment facility.

[0006] The invention described in claim 2 is a sludge treatment facility comprising: a storage section for storing sludge as raw material; a mixing section for mixing microorganisms with the sludge transported from the storage section to produce a microbial-mixed raw material; at least 10 fermentation sections arranged opposite each other across a passageway along which a wheel loader can travel, the fermentation section fermenting the microbial-mixed raw material transported from the mixing section by the wheel loader over a period of 7 to 10 days to produce compost; a sorting section having a trommel into which the compost produced in the fermentation section is input and which separates the compost into pelletizable compost from other compost; a granulation section for forming the compost sorted in the sorting section into pellets; and a deodorization section for removing odors emitted from the fermentation section, wherein the fermentation section has a floor that receives the microbial-mixed raw material, side walls that surround the floor, a roof that covers above the floor and has a top, and a door that opens and closes in the vertical direction, and some of the side walls, the roof, and the door are made of tempered glass, allowing light to enter the fermentation section.

[0007] The invention described in claim 3 is a sludge treatment facility comprising: a storage section for storing sludge as raw material; a mixing section for mixing microorganisms with the sludge transported from the storage section to produce a microbial-mixed raw material; at least 10 fermentation sections arranged opposite each other across an aisle, the fermentation section fermenting the microbial-mixed raw material transported from the mixing section for 7 to 10 days to produce compost; a sorting section into which the compost produced in the fermentation section is input and which separates it into compost that can be pelletized from other compost; a granulation section for forming the compost sorted in the sorting section into pellets; and a deodorizing section for removing odors emitted from the fermentation section, wherein the fermentation section has a floor that receives the microbial-mixed raw material, side walls that surround the floor, a roof that covers above the floor, and a door that opens and closes in the vertical direction, and some of the side walls, the roof, and the door are made of tempered glass, allowing light to enter the fermentation section.

[0008]

[0009]

[0010] [Effects of the Invention]

[0011] According to the present invention, a sludge treatment facility capable of treating sludge to produce compost can be provided. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a layout diagram of each part of a sludge treatment facility according to an embodiment of the present invention. [Figure 2] 1A and 1B are diagrams showing the fermentation section of the sludge treatment facility, in which (A) is an explanatory diagram showing the left side cross section, and (B) is an explanatory diagram showing the cross section as seen from the front (aisle side). [Figure 3] FIG. 2 is an explanatory diagram showing the sludge treatment process at the sludge treatment facility. [Figure 4](A) to (D) are explanatory diagrams showing the fermentation process in the sludge treatment facility. DETAILED DESCRIPTION OF THE INVENTION

[0013] Next, embodiments of the present invention will be described with reference to the accompanying drawings to facilitate understanding of the present invention. Note that parts not relevant to the description may be omitted from the illustrations.

[0014] As shown in FIG. 1, a sludge treatment facility 10 according to one embodiment of the present invention comprises a storage building 20, a treatment building 30, and a microbial culture building 50, and is capable of producing compost by fermenting sludge, which is organic waste discharged from a sewage treatment plant.

[0015] The storage building 20 is a roofed building, and inside is provided a storage section 202 that serves as a stockyard for storing sludge as a raw material. The storage building 20 is provided with an entrance and exit that allows a wheel loader that transports sludge to pass through. A plurality of holes 203 are arranged in a staggered pattern at intervals in the ground beneath the concrete foundation of the storage building 20. The depth of each hole 203 is, for example, 1.5 to 2.5 m, and these holes 203 are filled with binchotan charcoal kneaded with water. The action of the binchotan charcoal suppresses odors generated from the sludge stored in the storage building 20. Adjacent to the storage building 20 is a compost warehouse 204 for storing the produced pellet-shaped compost.

[0016] The treatment building 30 is a building for fermenting sludge to produce compost, and is located on the opposite side of the storage building 20 across the access road that runs through the site of the sludge treatment facility 10. The processing building 30 is a roofed building that extends in one direction, with entrances 302a and 302b at both ends, and a passageway extending from one entrance 302a to the other entrance 302b, allowing a wheel loader to travel along the passageway. Near the entrance / exit 302b, there is provided a partition 306 with an entrance / exit (opening) 304 through which a wheel loader can pass, and the interior of the treatment building 30 is broadly divided into a first space S1 where the sludge is actually treated, and a second space S2 where the rest is not treated.

[0017] Inside the treatment building 30, a mixing section 310, a fermentation section 320, a sorting section 330, a granulation section 340, and a deodorization section are provided. The mixing section 310 has an agitator 312 and can mix the sludge transported from the storage section 202 with a fermentation promoter to produce a microbial mixed raw material. Here, the fermentation promoter includes powdered aerobic microorganisms, cow manure, chicken manure, and wood chips. The powdered aerobic microorganisms are stored in a microorganism storage section 314 located adjacent to the mixing section 310 . Wood chips are stored in chip reservoir 316 located between microorganism reservoir 314 and fermentation reservoir 320 .

[0018] The fermentation section 320 can produce compost by fermenting the microorganism-mixed raw material transported from the mixing section 310. A plurality of fermentation sections 320 are provided facing each other across a passage, and the number of such sections is at least 10. As shown in FIGS. 2(A) and 2(B), the fermentation section 320 has a punched metal 323, a side wall 324a (see FIG. 1), side walls 324b to 324d, a roof 325, and a door 326.

[0019] The punched metal 323 forms a floor surface and can receive the microorganism-mixed raw material. The punched metal 323 has a rectangular shape in plan view. An air supply pipe 328 extends below the perforated metal 323, through which hot air at a predetermined temperature generated by a hot air generator 327 (see Figures 4(A) to 4(D)) is discharged. The supply of hot air through holes formed in the perforated metal 323 promotes fermentation of the microorganism-mixed raw material.

[0020] Side wall 324a (see Figure 1), side wall 324b (see Figure 2(A)), side wall 324c and side wall 324d (see Figure 2(B)) respectively constitute the walls on the front side, back side, left side side and right side side when looking at fermentation section 320 from the aisle side, and are attached to aluminum frame 321 so as to surround punched metal 323. The side walls 324a, 324c, and 324d are made of, for example, tempered glass, and the side wall 324b is made of, for example, aluminum.

[0021] The roof 325 covers the upper part of the punched metal 323, and as shown in FIG. 2(B), has a top Ap in the center when the fermentation section 320 is viewed from the aisle side. An exhaust port 329 is provided inside the top portion Ap for discharging odors generated in the fermentation section 320 to the deodorization section. The material of the roof 325 is tempered glass.

[0022] The door 326 can close the loading / unloading opening formed in the side wall 324a on the front side, and can be opened and closed in the vertical direction. The door 326 is made of, for example, tempered glass.

[0023] In this way, by using materials such as tempered glass for each of the side walls 324a, 324c, 324d, the roof 325 and the door 326, the materials are less susceptible to corrosion and more durable. In addition, light from inside the processing building 30 is irradiated into the inside of the fermentation section 320, improving the workability of workers. The side walls 324a, 324c, and 324d are not necessarily all made of tempered glass, and some of the side walls may be made of tempered glass.

[0024] Fermentation section 320 has an internal space formed by the aforementioned punched metal 323, side walls 324a to 324d, roof 325, and door 326, and is configured so that odors are discharged from exhaust port 329, making it difficult for odors to leak to the outside.

[0025] The sorting section 330 (see FIG. 1) has a trommel (not shown), into which the compost produced in the fermentation section 320 is fed, and compost of a predetermined size is sorted out. The trommel is installed near the mixing section 310 so as to penetrate the partition 306, and separates the compost fed into the first space S1 into compost that can be pelletized and the rest. The compost that can be pelletized is discharged into the first space S1, and the rest is discharged into the second space S2.

[0026] The pelletizing section 340 has a pellet machine 342 and can shape the compost sorted by the sorting section 330 into, for example, cylindrical pellets.

[0027] The deodorizing section has a scrubber 352 (see FIGS. 4(A) to 4(D)), and can remove odors generated from the storage section 202, the mixing section 310, and the fermentation section 320, as shown in FIG. The scrubbers 352 are installed in machine rooms S3a, S3b (see FIG. 1) formed on the rear side of each fermentation section 320. The machine rooms S3a, S3b are each located inside the outer wall of the treatment building 30 and are formed to extend along the longitudinal direction. The scrubber 352 is a wet scrubber.

[0028] The microorganism cultivation building 50 is a building in which a microorganism cultivation device (see FIG. 3) is installed for producing powdered aerobic microorganisms necessary for the fermentation treatment of sludge. The aerobic microorganisms are prepared by spraying a liquid containing primary bacterial cells obtained by culturing bacteria onto heat-sterilized zeolite, vermiculite, sawdust, or the like, which has been sprayed with mist. The cultivated aerobic microorganisms are transferred to the microorganism storage section 314 .

[0029] An office 60 is provided adjacent to the microorganism cultivation building 50. In the office 60, the temperature, humidity and odor intensity of the microbial mixed material being fermented in the fermentation section 320 are monitored.

[0030] Next, the treatment process performed by the sludge treatment facility 10 will be described with reference to FIG. The treatment process includes the following steps P1 to P5.

[0031] (Process P1) Sludge discharged from the sewage treatment plant is loaded onto trucks and transported in. The trucks enter from the access road and stop at truck scales 102 (see Figure 1) installed on the access road. The sludge to be treated is weighed by the truck scales 102 installed on the access road. The sludge is then transported from the truck by a wheel loader to the storage section 202 of the storage building 20, where it is temporarily stored together with livestock manure such as chicken manure and cow manure.

[0032] (Process P2) Sludge is transported by a wheel loader from the storage section 202 and a fermentation promoter is transported from the microorganism storage section 314 to the mixing section 310 of the treatment building 30. In the mixing section 310, the fermentation promoter is added to the sludge, and then the mixture is stirred by a mixer 312 to produce a microorganism-mixed raw material.

[0033] (Process P3) The door 326 of the fermentation section 320 (see FIG. 2(A)) is opened upward, and the produced microorganism-mixed raw material is transported by a wheel loader through the open door 326 to the fermentation section 320. Fermentation of the microorganism-mixed raw material stored in the fermentation section 320 is promoted by the action of hot air of, for example, 40°C generated from the hot air generator 327. In the fermentation process, gases containing methane and the like generated from the microorganism mixed raw material are treated in the scrubber 352 of the deodorizing section together with odorous gases generated from the storage section 202 and the mixing section 310, and are released into the atmosphere after the odor has been removed. Note that the moisture that has absorbed the gas components inside the scrubber 352 is discharged into a septic tank (not shown) as water with a concentration of 20 ppm.

[0034] (Process P4) The fermented microorganism-mixed raw material is transported by a wheel loader to the pelletizing section 340. The transported microorganism-mixed raw material is formed into pellets as compost.

[0035] (Process P5) The compost pellets are then bagged and shipped.

[0036] Next, the fermentation process in the fermentation section 320 will be described with reference to FIGS. 4(A) to 4(D). First, as a treatment on the first day, as shown in FIG. 4(A), the microorganism-mixed raw material is carried into the fermentation section 320, and hot air generated by the hot air generator 327 is supplied inside.

[0037] Next, as the treatment on the second to sixth days, as shown in FIG. 4(B) and FIG. 4(C), the microorganism-mixed raw material is left in a state where hot air is supplied to the raw material inside the fermentation section 320. As a result, the fermentation of the microbial mixed raw material progresses and its volume gradually decreases. Gases generated during the fermentation process are treated in a scrubber 352 .

[0038] Finally, as the treatment on the 7th to 10th days, the microorganism-mixed raw material is left standing with hot air being further supplied, as shown in FIG. 4(D). The fermented microbial mixed material eventually reduces in volume to 1 / 3 to 1 / 5 and becomes compost.

[0039] Thus, it takes 7 to 10 days for the fermentation process in the fermentation units 320. As mentioned above, by providing at least 10 fermentation units 320, the sludge can be treated efficiently in sequence.

[0040] As described above, the sludge treatment facility 10 can treat sludge as a raw material to produce compost.

[0041] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions that do not depart from the gist of the present invention are within the scope of application of the present invention. [Explanation of symbols]

[0042] 10 Sludge treatment facility 20 Storage Building 30 Processing Building 50 Microbial culture building 60 Office 102 Truck scale 202 Storage 203 holes 204 Compost warehouse 302a, 302b entrance / exit 304 Entrance / Exit 310 Mixing section 312 Mixer 314 Microbial Storage Unit 316 Chip storage unit 320 Fermentation Department 321 frames 323 Punching Metal 324a~324d side wall 325 Roof 326 Door 327 Hot Air Generator 328 Air supply pipe 329 Exhaust port 330 Sorting Department 340 Granulation Section 342 Pellet Machine 352 Scrubber S1 First Space S2 Second Space S3a, S3b Machine room

Claims

1. a storage section for storing sludge as a raw material; a mixing section for mixing microorganisms with the sludge transported from the storage section to produce a microbial mixed raw material; a fermentation section for fermenting the microbial mixed raw material transported from the mixing section; a granulation unit that forms the fermented microorganism mixed raw material into pellets; a deodorizing section that removes odors generated from the storage section, the mixing section, and the fermentation section.

2. The sludge treatment facility according to claim 1, The fermentation section A floor surface for receiving the microbial mixed raw material; A side wall surrounding the floor surface; A sludge treatment facility having a roof covering the floor surface.

3. The sludge treatment facility according to claim 1, The fermentation section A floor surface for receiving the microbial mixed raw material; A side wall surrounding the floor surface; a roof covering the floor surface and having a peak; A sludge treatment facility in which an exhaust outlet for discharging generated odors into the deodorizing section is provided on the inside of the top.

4. The sludge treatment facility according to claim 2 or 3, A sludge treatment facility, wherein the roof is made of tempered glass.

5. The sludge treatment facility according to claim 4, A sludge treatment facility, wherein at least a portion of the side walls are made of tempered glass.

6. The sludge treatment facility according to claim 5, The fermentation unit further has a door that opens and closes in the vertical direction, A sludge treatment facility into which the microorganism-mixed raw material is carried through the door.

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