Waste treatment equipment

Abstract

To provide a sewage treatment device capable of separating livestock farming sewage into solid and liquid matter and removing harmful substances as much as possible. [Solution] The sewage treatment device comprises a case 11, a separation chamber 12 provided at the lower end of the case, an aerobic fermentation chamber 29 provided at the upper end, an anaerobic fermentation chamber 20 provided in the case so as to be located between them, a first rotating shaft 13 extending along the axial direction of the case and penetrating the aerobic fermentation chamber, the anaerobic fermentation chamber and the separation chamber, a first motor 28 provided on the upper surface of the aerobic fermentation chamber so as to rotate the shaft, a first stirring rod 25 fixed to the first rotating shaft so as to be located in the aerobic fermentation chamber, a supply flow path 26 formed in the lid and through which sewage is supplied, a grinding mechanism 24 fixed to the case so as to be located in the aerobic fermentation chamber, a gas storage chamber formed in the peripheral wall of the case, a pump provided therein, and a gas supply mechanism that supplies gas from the gas storage chamber to the aerobic fermentation chamber by the pump.

Description

[Technical field]

[0001] The present invention relates to a waste treatment device. [Background technology]

[0002] Livestock waste is highly organic and contains large amounts of pathogens, so if it is discharged directly without treatment, it will pollute groundwater.

[0003] As in the prior art CN111420460A, the solid and liquid parts of the livestock farming sludge cannot be separated, and the single aerobic fermentation or single anaerobic fermentation cannot fully decompose the harmful substances in the sludge. Therefore, even if the sludge is treated, a large number of microorganisms remain, and there is still a risk of environmental pollution. Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a sewage treatment apparatus capable of separating solid matter and liquid matter in livestock farming sewage and removing harmful substances from the sewage as much as possible. [Means for solving the problem]

[0005] According to this aspect of the present invention, there is provided a cylindrical case with a bottom, a separation chamber provided at the lower end side of the case to separate solid and liquid matter of the waste, an aerobic fermentation chamber provided at the upper end side of the case, an anaerobic fermentation chamber provided in the case to be located between the separation chamber and the aerobic fermentation chamber, a first rotating shaft extending along the axial direction of the case and penetrating the aerobic fermentation chamber, the anaerobic fermentation chamber and the separation chamber, a first motor provided on the upper surface of the aerobic fermentation chamber to rotate the first rotating shaft about the axial direction, and a first stirring rod fixed to the first rotating shaft to be located in the aerobic fermentation chamber. The sewage treatment device includes a lid covering the upper end serving as an opening of the case, a supply flow path formed in the lid so as to penetrate the lid and through which sewage is supplied, a first liquid control valve provided in the supply flow path capable of opening and closing the supply flow path, a crushing mechanism located in the aerobic fermentation chamber and fixed to the case so as to crush solid matter in the sewage into fine solid matter, a gas storage chamber formed in the peripheral wall of the case, a pump provided in the gas storage chamber, and a gas supply mechanism that supplies gas stored in the gas storage chamber to the aerobic fermentation chamber by the pump, wherein the anaerobic fermentation chamber is connected to the aerobic fermentation chamber and the separation chamber. Effect of the Invention

[0006] According to the present invention, solid matter and liquid matter in livestock farming waste can be separated, and harmful substances in the waste can be removed as much as possible. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic perspective view showing a waste disposal device according to an embodiment of the present invention; [Diagram 2] 2 is a cross-sectional view taken along line AA in FIG. 1. [Diagram 3] FIG. 3 is an enlarged view showing the crushing mechanism in FIG. 2. [Figure 4] FIG. 3 is an enlarged view showing a gas supply mechanism in FIG. 2. [Diagram 5] FIG. 3 is an enlarged view showing the squeezing mechanism in FIG. 2. [Figure 6] 6 is a cross-sectional view taken along the line BB in FIG. 5. [Figure 7] FIG. 6 is a schematic perspective view showing the separation plate in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention (hereinafter, referred to as the present embodiment) will be described with reference to the accompanying drawings. In this specification, the same elements are denoted by the same reference numerals throughout.

[0009] (Configuration of waste treatment device) First, the configuration of the waste disposal device will be described in detail with reference to FIGS.

[0010] The sewage treatment device according to this embodiment is a livestock aquaculture sewage treatment device. As shown in Fig. 1 to Fig. 7, the sewage treatment device comprises a cylindrical case 11 with a bottom, a separation chamber 12 provided at the lower end side of the case to separate solid matter and liquid matter in livestock aquaculture sewage (hereinafter also simply referred to as sewage), an aerobic fermentation chamber 29 provided at the upper end side of the case 11, an anaerobic fermentation chamber 20 provided in the case 11 to be located between the separation chamber 12 and the aerobic fermentation chamber 29, a first rotating shaft 13 provided to extend along the axial direction of the case 11 and to penetrate the aerobic fermentation chamber 29, the anaerobic fermentation chamber 20 and the separation chamber 12, a first motor 28 provided on the upper surface of the aerobic fermentation chamber 29 to rotate the first rotating shaft 13 around the axial direction, and a second motor 29 provided in the aerobic fermentation chamber 29. The compost fertilizer is provided with a first stirring rod 25 fixed to the first rotating shaft 13 as shown in FIG. 1, a lid (symbol omitted) covering the upper open end of the case 11, a supply passage 26 formed in the lid so as to penetrate the lid and through which waste is supplied, a first liquid control valve 27 provided in the supply passage 26 so as to be able to open and close the supply passage 26, a crushing mechanism 50 located in the aerobic fermentation chamber 29 and fixed to the case 11 so as to crush solid matter in the waste into fine solid matter (i.e., fine particles), a gas storage chamber 40 formed in the peripheral wall of the case 11, a pump 39 provided in the gas storage chamber 40, and a gas supply mechanism 51 which supplies gas (specifically, high-pressure gas) stored in the gas storage chamber 40 to the aerobic fermentation chamber 29 by the pump 39.

[0011] As described below, the anaerobic fermentation chamber 20 communicates with the aerobic fermentation chamber 29 and the separation chamber 12. Here, the waste includes both liquid and solid matter. The case 11 may be composed of an upper case and a lower case connected to each other. The upper end of the first rotating shaft 13 is connected to the first motor 28, and the lower end of the first rotating shaft 13 is rotatably supported on the bottom of the case 11.

[0012] An external hose (not shown) connected to a supply source (not shown) is connected to the supply passage 26, so that the waste flowing from the supply source is supplied to the aerobic fermentation chamber 29 via the external hose and the supply passage 26. In this embodiment, the first stirring rod 25 is located below the crushing mechanism 50. This allows the length of the first stirring rod 25 extending along a radial direction perpendicular to the axial direction to be as long as possible without worrying about interference between the first stirring rod 25 and the crushing mechanism 50 (in this embodiment, the first stirring rod 25 is configured to overlap the crushing mechanism 50 along the radial direction when the first rotating shaft 13 is rotated to a predetermined position). As a result, the effect of stirring the waste in the aerobic fermentation chamber 29 can be improved.

[0013] The sewage treatment device also includes a first partition (symbol omitted) provided between the aerobic fermentation chamber 29 and the anaerobic fermentation chamber 20, a first liquid flow path 18 penetrating the first partition, a second liquid control valve 49 provided in the first liquid flow path 18 to open and close the first liquid flow path 18, a first gas flow path 23 communicating with the outside and the anaerobic fermentation chamber 20 and formed by penetrating the peripheral wall of the case 11, a first gas control valve 22 provided in the first gas flow path 23 to open and close the first gas flow path 23, a second stirring rod 19 fixed to the first rotating shaft 13 so as to be positioned in the anaerobic fermentation chamber 20, and a heater 21 provided in the peripheral wall of the case 11 to surround the anaerobic fermentation chamber 20.

[0014] As shown in FIG. 2, the crushing mechanism 50 is configured to be a pair so as to sandwich the first rotating shaft 13. As shown in FIG. 3, the crushing mechanism 50 has a cylindrical body (reference numeral omitted) extending along the axial direction, a connection block 24 provided on the peripheral wall of the case 11 to hold the cylindrical body, a second rotating shaft 31 partially accommodated in the cylindrical body so as to extend along the axial direction, an auger 33 fixed to the outer periphery of the second rotating shaft 31 so as to be accommodated in the cylindrical body, a second motor 35 provided on the lid to rotate the second rotating shaft 31, and a grinding disk 34 fixed to the outer periphery of the second rotating shaft 31 so as to be located on the upper side of the cylindrical body. A gap (not shown) is formed between the upper end of the cylindrical body and the lower surface of the grinding disk 34. The gap is formed so that fine solid matter crushed by the grinding disk 34 or the like can pass through.

[0015] As shown in Figures 2 and 4, the gas supply mechanism 51 has a pressure dividing chamber 37 formed in the first partition so as to communicate with the gas storage chamber 40, a plurality of nozzles 38 that connect the lower part of the aerobic fermentation chamber 29 with the pressure dividing chamber 37, and an L-shaped second gas flow path 30 that connects the upper part of the aerobic fermentation chamber 29 with the gas storage chamber 40.

[0016] As shown in Fig. 2, the nozzle 38 is configured such that its upper end faces the lower end of the cylinder where the grinding disk 34 is not provided. This makes it easier to supply high-pressure gas from the pressure dividing chamber 37 to the grinding mechanism 50. Meanwhile, the second gas flow passage 30 is composed of a first sub-gas flow passage (reference number omitted) whose lower end communicates with the gas storage chamber 40 and is formed to extend along the axial direction, and a second sub-gas flow passage (reference number omitted) whose upper end communicates with the upper part of the aerobic fermentation chamber 29 and is formed to extend along the radial direction. The end of the second sub-gas flow passage that communicates with the upper part of the aerobic fermentation chamber 29 is located above the connection block 24.

[0017] 2 and 5 to 7, the sewage treatment device includes a second partition (reference number omitted) provided between the anaerobic fermentation chamber 20 and the separation chamber 12, a second liquid passage 16 penetrating the second partition, a third liquid control valve 17 provided in the second liquid passage 16 so as to be capable of opening and closing the second liquid passage 16, a separation plate 48 fixed to the first rotating shaft 13 so as to divide the separation chamber 12 into an upper separation chamber (reference number omitted) and a lower separation chamber (reference number omitted), and a pressure vessel formed on the separation plate 48 so as to communicate between the upper separation chamber and the lower separation chamber. The separation plate 48 further includes a plurality of through holes 47, a squeezing mechanism 52 provided in the upper separation chamber to squeeze out liquid matter from the treated waste located on the upper surface of the separation plate 48, a scraping mechanism 53 provided in the upper separation chamber to scrape off small solid matter from the treated waste located on the upper surface of the separation plate 48, a discharge hole 15 formed through the peripheral wall of the case 11 to communicate with the upper separation chamber, and a third liquid flow path 14 formed through the peripheral wall of the case 11 to communicate with the lower separation chamber.

[0018] As shown in FIG. 2, the upper surface of the separation plate 48 is a tapered surface that is inclined downward from the inner periphery side to the outer periphery side along the radial direction. The discharge hole 15 is configured to be inclined at the same gradient as the upper surface of the separation plate 48. Specifically, the discharge hole 15 is configured so that the bottom is located on an extension line of the upper surface of the separation plate 48. With these configurations, the fine solid matter scraped off by the scraping mechanism 53 easily falls from the upper surface of the separation plate 48 and enters the discharge hole 15. In addition, a passage (not shown) connected to an external collection section (not shown) is connected to the discharge hole 15. As a result, the fine solid matter discharged from the discharge hole 15 can be collected in the external collection section. The multiple through holes 49 are configured so that the fine solid matter cannot enter. Specifically, the through holes 49 are configured so that the diameter is smaller than the particle size of the fine solid matter. As a result, only the liquid matter located in the upper separation chamber can be drained down to the lower separation chamber through the through holes 49, so that the solid matter and the liquid matter in the treated waste can be reliably separated. The third liquid flow path 14 is configured such that its bottom is positioned in the same straight line as the bottom of the separation chamber 12. This allows the liquid that has flowed down into the lower separation chamber to flow out to the outside via the third liquid flow path 14.

[0019] 5 to 7, the squeezing mechanism 52 includes a roller 43 supported in the upper separation chamber so that its outer circumferential surface can press the upper surface of the separation plate 48 by rotating, a third rotating shaft 46 that is parallel to the upper surface of the separation plate 48 and is provided to support the roller 43, a third motor 45 that is connected to one end of the third rotating shaft 46 and is fixed to the peripheral wall of the case 11 so as to rotate the third rotating shaft 46, and a support block 42 that is fixed to the second partition and supports the other end of the third rotating shaft 46 so that the third rotating shaft 46 can be rotated. In a plan view, the roller 43 is supported so as to extend along the radial direction.

[0020] As shown in FIG. 5 to FIG. 7, the scraping mechanism 53 has a scraping plate 41 fixed to the case 11 (specifically, the peripheral wall of the case 11) so as to be able to press the upper surface of the separation plate 48. In a plan view, the scraping plate 41 is provided so as to extend along the radial direction. As shown in FIG. 6, in this embodiment, in a plan view, the roller 43 and the scraping plate 41 are arranged on the same straight line. The second liquid flow path 16 is located in a first region (specifically, the upper half region of FIG. 6) defined by the roller 43 and the scraping plate 41, while the discharge hole 15 is located in a second region (specifically, the lower half region of FIG. 6) defined by the roller 43 and the scraping plate 41. This makes it possible to prevent solid matter in the treated waste from directly entering the discharge port 15 without passing through the squeezing process.

[0021] 2, the wastewater treatment device further includes an L-shaped third gas flow passage 36 formed in the case 11 to communicate between the gas storage chamber 40 and the separation chamber 12 (specifically, the upper separation chamber). The third gas flow passage 36 includes a third sub-gas flow passage (reference number omitted) whose upper end communicates with the gas storage chamber 40 and is formed to extend along the axial direction, and a fourth sub-gas flow passage (reference number omitted) whose lower end communicates with the upper separation chamber and is formed to extend along the radial direction. The heater 21 is provided adjacent to the third gas flow passage 36 (specifically, the third sub-gas flow passage).

[0022] As shown in FIG. 5, the waste disposal device further includes an ultraviolet lamp 44 fixed to the second partition so as to face the separation chamber 12 (specifically, the upper separation chamber).

[0023] (Operation of waste treatment device) Next, the operation of the waste disposal apparatus will be described.

[0024] First, in step S1, the first liquid control valve 27 is controlled to open and close, so that a predetermined amount of sewage supplied from the supply source is introduced into the aerobic fermentation chamber 29, which is a treatment chamber located at the most upstream side of the treatment process by the sewage treatment device. Then, the first motor 28 rotates the first rotating shaft 13 to rotate the first stirring rod 25, the second stirring rod 19, and the separation plate 48 at the same time. At the same time, the second motor 35 rotates the second rotating shaft 51 to rotate the auger 33 and the grinding plate 34 at the same time, so that the sewage in the aerobic fermentation chamber 29 can be sucked in from the lower end of the cylinder and discharged from the gap between the upper end of the cylinder and the grinding plate 34. At this time, solid matter in the sewage is crushed into fine solid matter by the grinding plate 34 or the like. At the same time, in order to ensure sufficient contact between the sewage and gas (including oxygen), the pump 39 is started to take in the air outside the case 11 as high-pressure gas into the gas storage chamber 40. A portion of the high-pressure gas is then supplied to the lower portion of the aerobic fermentation chamber 29 via the pressure dividing chamber 37 and the nozzle 38, thereby improving the oxygen content of the filth stirred by the first stirring rod 25. Meanwhile, another portion of the high-pressure gas is supplied to the upper portion of the aerobic fermentation chamber 29 via the second gas passage 30, thereby further improving the oxygen content of the filth (specifically, including liquid matter and fine solid matter) discharged by the crushing mechanism 50.

[0025] Next, in step S2, the filth treated in the aerobic fermentation chamber 29 is allowed to enter the anaerobic fermentation chamber 20 by controlling the opening and closing of the second liquid control valve 49. The heater 21 then raises the temperature of the filth in the anaerobic fermentation chamber 20 to a temperature suitable for anaerobic bacterial growth. At the same time, the second stirring rod 19 is rotated to improve the efficiency of anaerobic fermentation. At the same time, the first gas control valve 22 is opened to collect the biogas generated in the anaerobic fermentation chamber 20 outside the case 11. After the anaerobic fermentation is completed, the heater 21 further raises the temperature of the filth in the anaerobic fermentation chamber 20, thereby sterilizing the microorganisms in the filth in the anaerobic fermentation chamber 20 at high temperature.

[0026] Next, in step S3, the third liquid control valve 17 is controlled to open and close, so that the waste treated in the anaerobic fermentation chamber 20 is introduced into the separation chamber 12 (specifically, the upper separation chamber / i.e., the upper surface of the separation plate 48) as the treatment chamber located at the most downstream side of the treatment process by the waste treatment device. At the same time, the ultraviolet lamp 44 irradiates the upper separation chamber with ultraviolet light to disinfect and sterilize the waste treated in the anaerobic fermentation chamber 20, thereby ensuring that harmful pathogens in the waste are eliminated. At the same time, the third motor 45 can rotate the third rotating shaft 46 to rotate the roller 43. Then, the fine solid matter adhering to the upper surface of the separation plate 48 rotating (counterclockwise in FIG. 6 in this embodiment) is pressed, so that the moisture (liquid matter) contained in the fine solid matter can be squeezed out. At the same time, the high-pressure gas stored in the gas storage chamber 40 is supplied to the separation chamber 12 via the third gas flow path 36 while being heated by the heater 21. This allows the fine solid matter adhering to the upper surface of the separation plate 48 to be dried. Then, when the separation plate 48 rotates further, the fine solid matter from which the water has been squeezed out and dried (i.e., the fine solid matter separated from the dirt) can be scraped off by the scraping plate 41. The scraped off fine solid matter then rolls down along the upper surface of the separation plate 48 and is discharged through the discharge hole 15. At the same time, the treated liquid matter separated from the dirt flows down through the multiple through holes 47 into the lower separation chamber and is discharged through the third liquid flow path 14. As a result of the above, the fine solid matter and liquid matter in the treated dirt can be reliably separated.

[0027] After the aerobic fermentation chamber 29, the anaerobic fermentation chamber 20 and the separation chamber 12 are filled with filth, the above steps S1 to S3 can be carried out simultaneously.

[0028] (Effects of this embodiment) The wastewater treatment device according to this embodiment comprises a cylindrical case 11 with a bottom, a separation chamber 12 provided at the lower end of the case to separate solid matter and liquid matter from livestock farming waste (hereinafter also simply referred to as waste), an aerobic fermentation chamber 29 provided at the upper end of the case 11, an anaerobic fermentation chamber 20 provided in the case 11 so as to be located between the separation chamber 12 and the aerobic fermentation chamber 29, a first rotating shaft 13 provided to extend along the axial direction of the case 11 and to penetrate the aerobic fermentation chamber 29, the anaerobic fermentation chamber 20 and the separation chamber 12, a first motor 28 provided on the upper surface of the aerobic fermentation chamber 29 to rotate the first rotating shaft 13 about the axial direction, and a first stirring motor 29 fixed to the first rotating shaft 13 so as to be located in the aerobic fermentation chamber 29. The anaerobic fermentation chamber 20 is provided with a rod 25, a lid (symbol omitted) that covers the upper open end of the case 11, a supply passage 26 formed in the lid so as to penetrate the lid and through which waste material is supplied, a first liquid control valve 27 provided in the supply passage 26 so as to be able to open and close the supply passage 26, a crushing mechanism 50 located in the aerobic fermentation chamber 29 and fixed to the case 11 so as to crush solid matter in the waste material into fine solid matter (i.e., fine particles), a gas storage chamber 40 formed in the peripheral wall of the case 11, a pump 39 provided in the gas storage chamber 40, and a gas supply mechanism 51 that supplies gas (specifically, high-pressure gas) stored in the gas storage chamber 40 to the aerobic fermentation chamber 29 by the pump 39, and the anaerobic fermentation chamber 20 is connected to the aerobic fermentation chamber 29 and the separation chamber 12.

[0029] According to this configuration, by integrating the aerobic fermentation chamber 29, the anaerobic fermentation chamber 20, and the separation chamber 12 into the sewage treatment device, it is possible to provide a sewage treatment device that can separate solid and liquid matter in the sewage and remove harmful substances from the sewage as much as possible.

[0030] The sewage treatment device further includes a gas storage chamber 40 formed in the peripheral wall of the case 11, a pump 39 provided in the gas storage chamber 40, and a gas supply mechanism 51 that supplies the gas (specifically, high-pressure gas) stored in the gas storage chamber 40 to the aerobic fermentation chamber 29 by the pump, so that the gas (specifically, high-pressure gas) generated by the pump 39 and stored in the gas storage chamber 40 can be supplied to the aerobic fermentation chamber 29 by the gas supply mechanism 51. As a result, the efficiency of aerobic fermentation of sewage in the aerobic fermentation chamber 29 can be improved.

[0031] In addition to the gas supply mechanism 51, the sewage treatment device further includes a crushing mechanism 50 located in the aerobic fermentation chamber 29 and fixed to the case 11 so as to crush solid matter in the sewage into fine solid matter (i.e., fine particles), thereby enabling the aerobic fermentation of the sewage in the aerobic fermentation chamber 29 to be carried out satisfactorily.

[0032] Furthermore, by providing the grinding mechanism 50 in the aerobic fermentation chamber 29 (i.e., the treatment chamber located at the most upstream side of the treatment process by the sewage treatment device) rather than in the anaerobic fermentation chamber 20, aerobic fermentation of the sewage (especially the solid matter within the sewage) can be carried out more sufficiently in the aerobic fermentation chamber 29 than in a configuration in which the grinding mechanism 50 is provided in the anaerobic fermentation chamber 20.

[0033] In addition, in this embodiment, the sewage treatment device further includes a first partition (symbol omitted) provided between the aerobic fermentation chamber 29 and the anaerobic fermentation chamber 20, a first liquid flow path 18 penetrating the first partition, a second liquid control valve 49 provided in the first liquid flow path 18 to open and close the first liquid flow path 18, a first gas flow path 23 communicating with the outside and the anaerobic fermentation chamber 20 and formed by penetrating the peripheral wall of the case 11, a first gas control valve 22 provided in the first gas flow path 23 to open and close the first gas flow path 23, a second stirring rod 19 fixed to the first rotating shaft 13 so as to be positioned in the anaerobic fermentation chamber 20, and a heater 21 provided in the peripheral wall of the case 11 to surround the anaerobic fermentation chamber 20.

[0034] According to this configuration, by simply fixing the second stirring rod 19 to the first rotating shaft 13 to which the first stirring rod 25 is fixed and rotating the first rotating shaft 13, the first stirring rod 25 can simultaneously stir the waste in the aerobic fermentation chamber 29 and the second stirring rod 19 can simultaneously stir the waste in the anaerobic fermentation chamber 20, thereby simplifying the drive mechanism (first motor 28) for driving both stirring rods.

[0035] In addition, the sewage treatment device further includes a heater 21 provided on the peripheral wall of the case 11 so as to surround the anaerobic fermentation chamber 20, so that the temperature inside the anaerobic fermentation chamber 20 can be raised to a temperature suitable for anaerobic bacteria growth. As a result, the efficiency of anaerobic fermentation of sewage in the anaerobic fermentation chamber 20 can be improved.

[0036] In addition, the sewage treatment device further includes a first gas flow path 23 that communicates with the outside and the anaerobic fermentation chamber 20 and is formed by penetrating the peripheral wall of the case 11, and a first gas control valve 22 that is provided in the first gas flow path 23 so as to be able to open and close the first gas flow path 23. Therefore, by opening the first gas control valve 22, the biogas generated in the anaerobic fermentation chamber 20 can be recovered outside the case 11.

[0037] In addition, in this embodiment, the gas supply mechanism 51 has a pressure dividing chamber 37 formed in the first partition so as to communicate with the gas storage chamber 40, a plurality of nozzles 38 that communicate between the lower part of the aerobic fermentation chamber 29 and the pressure dividing chamber 37, and a second gas flow path 30 that communicates between the upper part of the aerobic fermentation chamber 29 and the gas storage chamber 40.

[0038] According to this configuration, a part of the high-pressure gas stored in the gas storage chamber 40 is supplied to the lower part of the aerobic fermentation chamber 29 via the pressure dividing chamber 37 and the nozzle 38 in order, thereby improving the oxygen content of the filth stirred by the first stirring rod 25, while another part of the high-pressure gas is supplied to the upper part of the aerobic fermentation chamber 29 via the second gas passage 30, thereby further improving the oxygen content of the filth (specifically, including liquid matter and fine solid matter) discharged by the crushing mechanism 50. As a result, the efficiency of aerobic fermentation of the filth in the aerobic fermentation chamber 29 can be improved.

[0039] In this embodiment, the wastewater treatment device includes a second partition (reference number omitted) provided between the anaerobic fermentation chamber 20 and the separation chamber 12, a second liquid passage 16 penetrating the second partition, a third liquid control valve 17 provided in the second liquid passage 16 so as to be capable of opening and closing the second liquid passage 16, a separation plate 48 fixed to the first rotating shaft 13 so as to divide the separation chamber 12 into an upper separation chamber (reference number omitted) and a lower separation chamber (reference number omitted), and a plurality of separators formed on the separation plate 48 so as to communicate between the upper separation chamber and the lower separation chamber. It further includes a through hole 47, a squeezing mechanism 52 provided in the upper separation chamber to squeeze out liquid matter from the treated waste located on the upper surface of the separation plate 48, a scraping mechanism 53 provided in the upper separation chamber to scrape off small solid matter from the treated waste located on the upper surface of the separation plate 48, a discharge hole 15 formed through the peripheral wall of the case 11 to communicate with the upper separation chamber, and a third liquid flow path 14 formed through the peripheral wall of the case 11 to communicate with the lower separation chamber.

[0040] In this embodiment, the squeezing mechanism 52 has a roller 43 supported in the upper separation chamber so that the outer circumferential surface of the roller 43 can press the upper surface of the separation plate 48 by rotating.

[0041] In this embodiment, the scraping mechanism 53 has a scraping plate 41 fixed to the case 11 so as to be able to press the upper surface of the separation plate 48 .

[0042] With these configurations, by simply fixing the separation plate 48 to the first rotating shaft 13 to which the first stirring rod 25 and the second stirring rod 19 are fixed and rotating the first rotating shaft 13, the first stirring rod 25 can agitate the waste in the aerobic fermentation chamber 29, the second stirring rod 19 can agitate the waste in the anaerobic fermentation chamber 20, and the separation plate 48 can be rotated simultaneously, thereby simplifying the drive mechanism for driving both stirring rods and the separation plate 48.

[0043] In addition, the sewage treatment device further includes a squeezing mechanism 52 provided in the upper separation chamber to squeeze out liquid matter from the treated sewage located on the upper surface of the separation plate 48, and a scraping mechanism 53 provided in the upper separation chamber to scrape off fine solid matter from the treated sewage located on the upper surface of the separation plate 48.Therefore, by pressing the fine solid matter adhering to the upper surface of the rotating separation plate 48 with the squeezing mechanism 52 (specifically, the squeezing mechanism 52), the moisture (liquid matter) contained in the fine solid matter can be squeezed out, and when the separation plate 48 rotates further, the fine solid matter from which the moisture has been squeezed and which has been dried (i.e., the fine solid matter separated from the sewage) can be scraped off by the scraping mechanism 53 (specifically, the scraping plate 41).

[0044] In addition, the waste treatment device further includes a plurality of through holes 47 formed in the separation plate 48 to connect the upper separation chamber and the lower separation chamber, so that the water (liquid) squeezed out of the fine solid matter can flow down into the lower separation chamber through the plurality of through holes 47. As a result, the fine solid matter and the liquid matter in the treated waste can be reliably separated.

[0045] In addition, in this embodiment, the sewage treatment device further includes an L-shaped third gas flow path 36 formed in the case 11 so as to connect the gas storage chamber 40 and the separation chamber 12 (specifically, the upper separation chamber), and the heater 21 is provided adjacent to the third gas flow path 36.

[0046] According to this configuration, the high-pressure gas stored in the gas storage chamber 40 is supplied to the separation chamber 12 via the third gas flow path 36 while being heated by the heater 21 (specifically, the residual heat of the heater 21). This makes it possible to dry the fine solid particles adhering to the upper surface of the separation plate 48.

[0047] In this embodiment, the waste disposal device further includes an ultraviolet lamp 44 fixed to the second partition plate so as to face the separation chamber 12.

[0048] According to this configuration, the ultraviolet lamp 44 irradiates the upper separation chamber with ultraviolet light, thereby disinfecting and sterilizing the waste treated in the anaerobic fermentation chamber 20, thereby ensuring that harmful pathogens in the waste have been eliminated.

[0049] In this embodiment, the crushing mechanism 50 includes a cylindrical body (reference numeral omitted) extending along the axial direction, a connection block 24 provided on the peripheral wall of the case 11 to hold the cylindrical body, a second rotating shaft 31 partially accommodated in the cylindrical body so as to extend along the axial direction, an auger 33 fixed to the outer periphery of the second rotating shaft 31 so as to be accommodated in the cylindrical body, a second motor 35 provided on the lid to rotate the second rotating shaft 31, and a grinding disk 34 fixed to the outer periphery of the second rotating shaft 31 so as to be located on the upper side of the cylindrical body. A gap is formed between the upper end of the cylindrical body and the lower surface of the grinding disk 34.

[0050] According to this configuration, the second motor 35 rotates the second rotating shaft 51 to simultaneously rotate the auger 33 and the grinding disk 34, so that the waste in the aerobic fermentation chamber 29 can be sucked in from the lower end of the cylinder and discharged from the gap between the upper end of the cylinder and the grinding disk 34. At this time, solid matter in the waste can be crushed into fine solid matter by the grinding disk 34 etc.

[0051] Although the present embodiment has been described above, the above-described embodiment merely illustrates some of the application examples of the present invention, and is not intended to limit the technical scope of the present invention to the specific configurations of the above-described embodiment. [Explanation of symbols]

[0052] 11 Cases 12 Separation room 13 First Rotation Axis 20 Anaerobic fermentation chamber 24 Crushing mechanism 25 1st stirring bar 26 Supply Channel 28 First Motor 29 Aerobic Fermentation Chamber 39 Pump 40 Gas Storage Chamber 51 Gas supply mechanism

Claims

1. A cylindrical case with a bottom; a separation chamber provided at a lower end side of the case to separate solid matter and liquid matter of the waste; an aerobic fermentation chamber provided on the upper end side of the case; an anaerobic fermentation chamber provided in the case so as to be located between the separation chamber and the aerobic fermentation chamber; a first rotating shaft extending along the axial direction of the case and penetrating the aerobic fermentation chamber, the anaerobic fermentation chamber, and the separation chamber; a first motor provided on the upper surface of the aerobic fermentation chamber so as to rotate the first rotating shaft; a first stirring rod fixed to the first rotating shaft so as to be located in the aerobic fermentation chamber; A lid for covering an upper end serving as an opening end of the case; a supply flow passage formed in the lid so as to penetrate the lid and through which waste is supplied; a first liquid control valve provided in the supply flow passage so as to be able to open and close the supply flow passage; a crushing mechanism located in the aerobic fermentation chamber and fixed to the case for crushing solid matter in the waste into fine solid matter; A gas storage chamber formed in a peripheral wall of the case; A pump provided in the gas storage chamber; a gas supply mechanism that supplies the gas stored in the gas storage chamber to the aerobic fermentation chamber by the pump; The anaerobic fermentation chamber is in communication with the aerobic fermentation chamber and the separation chamber. Waste disposal equipment.

2. A first partition provided between the aerobic fermentation chamber and the anaerobic fermentation chamber; a first liquid flow path passing through the first partition; a second liquid control valve provided in the first liquid flow path to be able to open and close the first liquid flow path; a first gas flow passage that connects the outside with the anaerobic fermentation chamber and that penetrates the peripheral wall of the case; a first gas control valve provided in the first gas flow path; a second stirring rod fixed to the first rotating shaft so as to be located in the anaerobic fermentation chamber; and a heater provided on the peripheral wall of the case so as to surround the anaerobic fermentation chamber. The waste treatment device according to claim 1.

3. The gas supply mechanism includes: A pressure dividing chamber formed in the first partition so as to communicate with the gas storage chamber; a plurality of nozzles communicating a lower portion of the aerobic fermentation chamber with the pressure dividing chamber; A second gas flow path communicating an upper portion of the aerobic fermentation chamber with the gas storage chamber; The waste treatment device according to claim 2.

4. a second partition provided between the anaerobic fermentation chamber and the separation chamber; a second liquid flow path passing through the second partition; a third liquid control valve provided in the second liquid flow path to be capable of opening and closing the second liquid flow path; a separation plate fixed to the first rotating shaft so as to divide the separation chamber into an upper separation chamber and a lower separation chamber; A plurality of through holes formed in the separation plate so as to communicate between the upper separation chamber and the lower separation chamber; a squeezing mechanism provided in the upper separation chamber for squeezing out liquid matter from the treated waste located on the upper surface of the separation plate; a scraping mechanism provided in the upper separation chamber for scraping off minute solid particles from the treated waste located on the upper surface of the separation plate; a discharge hole formed through the peripheral wall of the case so as to communicate with the upper separation chamber; a third liquid flow path formed through the peripheral wall of the case so as to communicate with the lower separation chamber; The waste treatment device according to claim 2.

5. The squeezing mechanism has a roller supported in the upper separation chamber so that an outer circumferential surface of the roller can press the upper surface of the separation plate by rotating. The waste disposal device according to claim 4.

6. The scraping mechanism has a scraping plate fixed to the case so as to be capable of pressing against the upper surface of the separation plate. The waste disposal device according to claim 4.

7. The gas storage device further includes a third gas flow path formed in the case so as to communicate between the gas storage chamber and the separation chamber, The heater is provided adjacent to the third gas flow path. The waste disposal device according to claim 4.

8. Further, an ultraviolet lamp is fixed to the second partition so as to face the separation chamber. A waste treatment device according to claim 7.

9. The crushing mechanism includes: A cylindrical body extending along the axial direction; a second rotating shaft, a portion of which is housed in the cylindrical body so as to extend along the axial direction; an auger fixed to an outer circumferential side of the second rotating shaft so as to be accommodated in the cylindrical body; a second motor provided on the cover so as to rotate the second rotating shaft; a polishing disk fixed to the outer circumferential side of the second rotating shaft so as to be located above the cylindrical body, A gap is formed between the upper end of the cylindrical body and the lower surface of the polishing disk. The waste treatment device according to claim 1.

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