JP2005131555A - Garbage treatment system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a garbage treatment system wherein the size of a treatment vessel for treating object water such as general kitchen wastewater, garbage wastewater containing shredded garbage can be reduced. <P>SOLUTION: The treatment vessel 22 is partitioned by a first partition wall 23 and a second partition wall 24 into an aerobic decomposition vessel 25, a solid-liquid separation vessel 26 and an aerobic treatment vessel 27. The solid-liquid separation vessel 26 is further partitioned by a third partition wall 28 into a wastewater inflow chamber 29 and a solid-liquid separation chamber 30. The third partition wall 28 is provided with a first communication port 32 for allowing the wastewater inflow chamber 29 and the solid-liquid separation chamber 30 to communicate with each other in their bottoms. The first partition wall 23 is provided with a second communication port 33 for allowing the aerobic decomposition vessel 25 and the solid-liquid separation chamber 30 to communicate with each other in their bottoms. A first overflow section 34 for transferring a garbage suspension in the wastewater inflow chamber 29 to the aerobic decomposition vessel 25 is formed in the upper part of the first partition wall 23. A second overflow section 35 for transferring the garbage suspension in the solid-liquid separation chamber 30 to the aerobic treatment vessel 27 is formed in the upper part of the second partition wall 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a garbage disposal system for purifying garbage wastewater containing garbage fragments crushed by a crusher.

  As a household garbage processing system using a garbage crusher, for example, a configuration shown in Patent Document 1 is known. This garbage disposal system includes a separation device, a pretreatment tank, an anaerobic tank, an aerobic tank, and a treated water tank. The separation device performs solid-liquid separation on the solid suspension of food waste crushed by a garbage crusher. The pretreatment tank includes a first chamber (lower chamber) in which the solid separated by the separation device is transferred and a second chamber (upper chamber) in which the suspension liquid passing through the separation device is transferred. It has more. The solid suspension is subjected to solid-liquid separation (separated into solid and suspension liquid) by a separation device. The solid is transferred to the first chamber of the pretreatment tank and settled to the bottom of the tank, and the suspension liquid is transferred to the second chamber of the pretreatment tank. Solids in the solid suspension are solubilized in the first chamber. The treated water treated by the first chamber is transferred to the anaerobic tank, and the organic matter in the treated water is decomposed by the anaerobic microorganisms attached to the microbial adherent in the anaerobic tank. The treated water treated in the anaerobic tank is transferred to the aerobic tank, and the organic matter in the treated water transferred to the aerobic tank is aerobically decomposed by the aerobic microorganisms attached to the microbial adherent in the aerobic tank. The The treated water treated in the aerobic tank is transferred to the treated water tank. A portion of the treated water in the treated water tank is returned to the pretreatment tank and the remaining treated water is discharged out of the apparatus.

A garbage disposal system as shown in Patent Document 2 is also known. This garbage disposal system includes a sand settling tank that separates inorganic solids in solids contained in dredged wastewater, an aerobic digester that treats dredged wastewater from which inorganic solids have been removed, and an aerobic digester A sedimentation tank for separating the internal liquid into concentrated organic solids / sludge and separated wastewater, and a wastewater treatment tank for aerobic biological treatment of the separated wastewater separated by the sedimentation tank are provided. The treated water treated in the wastewater treatment tank is discharged outside the tank.
JP 2000-271594 A JP 2000-279899 A

  However, in the garbage processing system described in Patent Document 1, by disposing a separation device in the previous stage of the pretreatment tank, the solid matter in the solid suspension is prevented from flowing into the aerobic tank. Yes. However, the suspended matter in the solid suspension that has passed through the separator flows into the pretreatment tank, and the suspended matter that has flowed into the pretreatment tank may flow into the aerobic tank. In such a case, the aerobic processing performance deteriorates. For this reason, in order to prevent the floating substance from flowing into the aerobic tank, it is necessary to provide an anaerobic tank for solubilizing the floating substance in the previous stage of the aerobic tank. In order to secure the processing capacity of the anaerobic tank, the volume of the anaerobic tank needs to be secured above a certain level. Therefore, there is a limit to downsizing the anaerobic tank, and thus downsizing the whole garbage disposal system.

  Moreover, in the garbage processing system of patent document 2, when dredging waste water (treated water) more than the capacity of a sedimentation tank flows into a sand settling tank, the internal water containing the sludge of an aerobic digestion tank is from a sedimentation tank. It overflows and flows into the wastewater treatment tank. Therefore, it is necessary to secure a certain volume of the settling tank in order to ensure the processing capacity, and there is a limit to downsizing.

  The present invention has been made to solve the above-mentioned problems, and its purpose is to reduce the size of a treatment tank that treats water to be treated such as garbage wastewater containing crushed garbage and general kitchen wastewater. Is to provide a garbage disposal system.

  The invention described in claim 1 is a garbage processing system including a treatment tank for purifying garbage wastewater containing garbage crushed material crushed by a crusher, wherein the treatment tank is transferred by a transfer means. A solid-liquid separation tank that separates the garbage waste water into a crushed garbage that is a solid content and a garbage suspension that is a liquid content, and the solid-liquid separation tank that is disposed in front of the solid-liquid separation tank The aerobic decomposition tank in which the crushed garbage separated by the above is transferred to solubilize the crushed garbage, and the garbage suspension disposed in the subsequent stage of the solid-liquid separation tank And an aerobic treatment tank in which only the solubilized garbage suspension in the aerobic decomposition tank is transferred to each aerobic treatment of both the garbage suspensions.

  The invention according to claim 2 is the invention according to claim 1, wherein the treatment tank is divided into an aerobic decomposition tank, a solid-liquid separation tank and an aerobic treatment tank by a first partition and a second partition. The liquid separation tank is a solubilized treatment in the wastewater inflow chamber in which the garbage wastewater from the transfer means is transferred by the floating crushed material advancing prevention wall, the garbage suspension in the solid-liquid separation tank, and the aerobic decomposition tank And a solid-liquid separation chamber to which the raw garbage suspension is transferred, and the floating crushed material advection prevention wall has a first communication port for communicating the drainage inflow chamber and the solid-liquid separation chamber at their bottoms. The first partition is provided with a second communication port that communicates the solid-liquid separation chamber and the aerobic decomposition tank at the bottom thereof, and the drainage inflow chamber accompanying the inflow of garbage wastewater is provided above the first partition. It is possible to transfer the raw garbage suspension for the overflow to the aerobic decomposition tank A first overflow section is provided, and a second overflow section is provided above the second partition wall, which allows the overflow of the garbage waste in the solid-liquid separation chamber accompanying the inflow of garbage wastewater to be transferred to the aerobic treatment tank. The gist is that it is provided.

(Function)
According to the first aspect of the present invention, the garbage wastewater transferred by the transfer means is separated into the garbage crushed material and the garbage suspension by the solid-liquid separation tank. Garbage crushed material separated by the solid-liquid separation tank (including sedimentation crushed material that settles in the solid-liquid separation tank and floating crushed material that floats on the water surface) is aerobic arranged in front of the solid-liquid separation tank Advection only to the decomposition tank, solubilized in the aerobic decomposition tank. Garbage crushed material separated by the solid-liquid separation tank is not transferred to the aerobic treatment tank in the subsequent stage. The solid waste separation tank garbage suspension and the solubilized garbage suspension transferred from the aerobic decomposition tank are transferred to the aerobic treatment tank disposed at the subsequent stage of the solid liquid separation tank. Then, the aerobic treatment is performed in the aerobic treatment tank.

  Since garbage wastewater is separated into garbage crushed material and garbage suspension in the aerobic decomposition tank, garbage wastewater is separated into garbage crushed material and garbage suspension before pouring the garbage wastewater into the treatment tank. It is not necessary to separately provide a separation device for separating the two in front of the treatment tank. In addition, since the garbage crushed material is transferred only to the aerobic decomposition tank and is not transferred to the aerobic treatment tank, the garbage crushed material that degrades the processing performance of the aerobic treatment tank is removed from the preceding stage of the aerobic treatment tank. There is no need to pre-process. Therefore, it is not necessary to provide an anaerobic decomposition tank for anaerobically treating the garbage crushed material in the front stage of the aerobic treatment tank. For this reason, compared with the case where an anaerobic decomposition tank is provided in the front | former stage of an aerobic treatment tank in order to prevent the inflow of the untreated garbage crushed material to an aerobic treatment tank, size reduction of a treatment tank is achieved. .

  According to invention of Claim 2, in addition to the effect | action of invention of Claim 1, the garbage wastewater from the said transfer means is transferred to a waste_water | drain inflow chamber. The garbage suspension in the drainage inflow chamber is transferred to the solid-liquid separation chamber through the first communication port. Of the crushed garbage in the waste water inflow chamber, the crushed sediment is transferred into the aerobic decomposition tank through the second communication port. In the wastewater inflow chamber, the overflowed garbage suspension resulting from the inflow of the garbage wastewater is transferred to the aerobic decomposition tank through the first overflow section together with the suspended crushed material among the crushed garbage. The solubilized garbage suspension in the aerobic decomposition tank is transferred to the solid-liquid separation chamber through the second communication port. As the garbage wastewater flows into the wastewater inflow chamber, the garbage suspension in the solid-liquid separation chamber is transferred to the aerobic treatment tank through the second overflow portion. In the drainage inflow chamber, the advection of floating crushed material floating on the water surface to the solid-liquid separation chamber is regulated by the floating crushed material advection prevention wall. As a result, the crushed garbage and the garbage suspension are more reliably separated.

  ADVANTAGE OF THE INVENTION According to this invention, size reduction of the processing tank which processes to-be-processed water, such as garbage wastewater containing the crushed garbage and general kitchen wastewater, is achieved.

Hereinafter, an embodiment in which the present invention is embodied in a garbage disposal system will be described with reference to FIG.
(Structure of the whole garbage disposal system)
As shown in FIG. 1, the garbage processing system 11 includes a crusher 12 provided at the bottom of a kitchen sink and a ground-mounted processing device 13 installed outdoors. The crusher 12 and the processing device 13 are connected to each other via a transfer pipe 14. Wastewater containing crushed garbage (hereinafter referred to as “garbage wastewater”) crushed by the crusher 12 is transferred into the processing device 13 through the transfer pipe 14.

(Treatment tank)
As shown in FIG. 1, a processing tank 22 is disposed in the casing 21 of the processing apparatus 13. The inside of the processing tank 22 is divided into three tanks of an aerobic decomposition tank 25, a solid-liquid separation tank 26 and an aerobic processing tank 27 by the first partition wall 23 and the second partition wall 24. The solid-liquid separation tank 26 is further divided into two chambers, a drainage inflow chamber 29 and a solid-liquid separation chamber 30, by a third partition wall 28 as a floating crushed material advancing prevention wall. An outlet of the transfer pipe 14 is disposed above the drainage inflow chamber 29, and garbage wastewater from the transfer pipe 14 can flow into the drainage inflow chamber 29.

  The lower part of the first partition wall 23 is inclined toward the second partition wall 24 side (aerobic treatment tank 27 side) and constitutes the bottom wall 31 of the solid-liquid separation tank 26. Between the bottom wall 31 and the lower end edge of the third partition wall 28, a first communication port 32 that connects the drainage inflow chamber 29 and the solid-liquid separation chamber 30 is formed. A second communication port 33 is formed between the lower edge of the bottom wall 31 and the second partition wall 24 to communicate the aerobic decomposition tank 25 and the solid-liquid separation tank 26.

  A first overflow portion 34 is formed on the first partition wall 23. When the garbage wastewater flows into the drainage inflow chamber 29, the overflow garbage wastewater in the drainage inflow chamber 29 can flow into the aerobic decomposition tank 25 via the first overflow portion 34. A second overflow portion 35 is formed on the second partition wall 24. When the garbage wastewater in the drainage inflow chamber 29 flows into the solid-liquid separation chamber 30 through the first communication port 32, the overflowing garbage wastewater in the solid-liquid separation chamber 30 passes through the second overflow part 35. Through the aerobic treatment tank 27. In the processing tank 22, an outflow port 36 is formed on an upper portion of a side wall facing the aerobic processing tank 27 (that is, a side wall facing the second partition wall 24 of the processing tank 22). Garbage waste water for the overflow of the aerobic treatment tank 27 can flow out of the casing 21 through the outlet 36.

(Solid-liquid separation tank)
The solid-liquid separation tank 26 separates solids (garbage crushed material) and liquids (garbage suspension) contained in the garbage wastewater transferred from the transfer pipe 14. The drainage inflow chamber 29 performs sedimentation treatment of the garbage wastewater that has flowed in from the transfer pipe 14. Of the crushed garbage, the crushed sediment settles in the drainage inflow chamber 29, passes through the first communication port 32 while being guided by the bottom wall 31, and further passes through the second communication port 33 to enter the aerobic decomposition tank 25. Advection is possible. Among the crushed garbage, the floating crushed material floating on the water surface of the drainage inflow chamber 29 enters the aerobic decomposition tank 25 through the first overflow portion 34 together with the overflowed garbage suspension in the drainage inflow chamber 29. Advection is possible. The garbage suspension that has been solid-liquid separated in the drainage inflow chamber 29 can be transferred into the solid-liquid separation chamber 30 via the first communication port 32.

(Aerobic decomposition tank)
The aerobic decomposition tank 25 is a solid that has been transferred to the aerobic decomposition tank 25 via the floating substance in the garbage wastewater flowing in from the drainage inflow chamber 29 via the first overflow portion 34 and the second communication port 33. The product is solubilized by aerobic decomposition. In the aerobic decomposition tank 25, an aeration tube 41 is disposed below the bottom wall 31 as aerobic decomposition aeration means. A blower 43 is connected to the diffuser pipe 41 via a connecting pipe 42, and air (oxygen) flows into the aerobic decomposition tank 25 by driving the blower 43, and the air outlets of the connecting pipe 42 and the diffuser pipe 41. Is supplied through. The arrangement position (air ejection direction) of the air diffuser 41 is set so that the air bubbles from the air diffuser 41 contact the bottom wall 31 from below.

(Aerobic treatment tank)
The aerobic treatment tank 27 further aerobically treats the garbage suspension flowing in from the solid-liquid separation chamber 30 and the garbage suspension solubilized in the aerobic decomposition tank 25. In the aerobic treatment tank 27, a box-like filter support member 51 having an upper opening is formed on the upper part of one side wall (side wall facing the second partition wall 24) of the treatment tank 22 facing the aerobic treatment tank 27. It is detachable. The filter support member 51 is provided so as to cover the outflow port 36 of the aerobic treatment tank 27 from the inside. The bottom wall 51a of the filter support member 51 is inclined so as to form a predetermined angle with respect to the inner bottom surface of the processing tank 22 (aerobic processing tank 27). A mesh-like filter 52 having a single or a plurality of predetermined openings is provided on the bottom wall 51a. The attachment position of the filter support member 51 is set so that the filter support member 51 is immersed in the waste water in the aerobic treatment tank 27 from the lower part to the intermediate part (submerged state).

  A diffuser pipe 61 is disposed below the bottom wall 51 a of the filter support member 51, that is, below the filter 52, as an aerobic treatment diffuser. A blower 43 is connected to the diffuser pipe 61 via a connecting pipe 62, and air (oxygen) flows into the aerobic treatment tank 27 by driving of the blower 43, and the air outlets of the connecting pipe 62 and the diffuser pipe 61. Is supplied through. The arrangement position (air ejection direction) of the air diffuser 61 is set so that the bubbles from the air diffuser 61 come into contact with the filter 52 from below.

  In the garbage suspension stored in the aerobic treatment tank 27, a plurality of carriers 71 for depositing aerobic microorganisms are charged and floated. That is, the aerobic treatment tank 27 is a fluidized bed in which a plurality of carriers 71 are suspended. Each carrier 71 is formed in a spherical shape (including not only a circular cross section but also an elliptical cross section) with a diameter of about 5 mm by porous PVA (polyvinyl alcohol) gel. The surface of the PVA gel has fine irregularities and is excellent in initial adhesion of aerobic microorganisms. In addition, innumerable fine pores communicate with the inside of the PVA gel from the surface, and a structure in which aerobic microorganisms are easy to enter and settle. For this reason, the bacterial cell concentration (concentration of aerobic microorganisms) in the aerobic treatment tank 27 is increased.

(Operation of the embodiment)
Next, the operation of the garbage processing system configured as described above will be described. Garbage dropped together with kitchen wastewater (general kitchen wastewater) from the drainage port of the kitchen sink is crushed to a predetermined size by the crusher 12. Garbage wastewater (treated water) containing crushed garbage that has been crushed by the crusher 12 is transferred into the wastewater inflow chamber 29 of the solid-liquid separation tank 26 via the transfer pipe 14.

(Solid-liquid separation process)
Solids (for example, organic components such as crushed garbage and inorganic components such as egg shells) contained in the wastewater transferred to the wastewater inflow chamber 29 settle in the wastewater inflow chamber 29. To do. This settled solid (hereinafter referred to as “sedimented crushed material”) passes through the first communication port 32 while being guided by the bottom wall 31, and further flows into the aerobic decomposition tank 25 through the second communication port 33. To do. Further, the liquid component (garbage suspension) in the garbage waste water from which the solid content has been separated flows into the solid-liquid separation chamber 30 via the first communication port 32.

  On the other hand, the water level of the drainage inflow chamber 29 rises due to the inflow of garbage wastewater, and the liquid content (the garbage suspension) of the overflow of the drainage inflow chamber 29 is called floating matter on the water surface (hereinafter referred to as “floating crushed material”). ) And the aerobic decomposition tank 25 through the first overflow portion 34. In addition, the liquid component of the overflowing garbage waste in the solid-liquid separation chamber 30 flows into the aerobic treatment tank 27 through the second overflow unit 35.

  The advancing of the floating crushed material in the drainage inflow chamber 29 to the solid-liquid separation chamber 30 side is regulated by the third partition wall 28. For this reason, the floating crushed material in the drainage inflow chamber 29 does not flow into the aerobic treatment tank 27 through the solid-liquid separation chamber 30. Further, the suspended crushed material flows into the aerobic decomposition tank 25 from the first overflow portion 34, and the settled crushed material is transferred into the aerobic decomposition tank 25 through the second communication port 33. For this reason, regardless of the amount of inflow of the garbage wastewater from the transfer pipe 14, the suspended crushed material and the settled crushed material always flow into the aerobic decomposition tank 25. Since the suspended crushed material and the settled crushed material do not flow into the aerobic treatment tank 27, it is not necessary to secure a capacity of the solid-liquid separation tank 26 (strictly, the drainage inflow chamber 29) above a certain level.

(Aerobic decomposition process)
The suspended crushed material flowing into the aerobic decomposition tank 25 from the first overflow portion 34 and the settled crushed material transferred to the aerobic decomposition tank 25 from the second communication port 33 are aerobic in the aerobic decomposition tank 25. Disassembled. The aerobic decomposition process is a process in which various aerobic microorganisms are involved in the presence of dissolved oxygen to remove organic substances, ammoniacal nitrogen, odors and the like by oxidative decomposition. That is, when the blower 43 is driven, air (oxygen) is supplied into the aerobic decomposition tank 25 through the connection pipe 42 and the diffuser pipe 41 (aeration treatment), and thereby adheres to the surface of organic matter such as garbage crushed material. The aerobic microorganisms and the aerobic microorganisms in the aerobic decomposition tank 25 are activated. The activated aerobic microorganisms decompose organic components such as crushed garbage contained in the trash wastewater and solubilize (liquefy).

  Since the air diffuser 41 is disposed below the bottom wall 31 of the solid-liquid separation tank 26, the bubbles ejected from the air outlets of the air diffuser 41 rise in the aerobic decomposition tank 25 and reach the bottom wall 31. Contact from below. The bubbles are guided upward from below by the inclined bottom wall 31 and are guided to the wall surface facing the first partition wall 23 of the aerobic decomposition tank 25. As a result, a counterclockwise swirling flow C1 indicated by an arrow in FIG.

  Undecomposed garbage crushed material contained in the wastewater drainage in the aerobic decomposition tank 25 also flows counterclockwise in the aerobic decomposition tank 25 by the swirling flow C1, and aerobically decomposes while contacting the bottom wall 31. The tank 25 is guided to the wall surface facing the first partition wall 23. That is, the crushed garbage in the aerobic decomposition tank 25 is agitated by the swirl flow C1. The undecomposed raw garbage crushed materials collide with each other by agitation by a water flow, and are brought into contact with the bottom wall of the aerobic decomposition tank 25 to promote the miniaturization thereof. The solubilized garbage suspension containing the garbage crushed material decomposed to, for example, 1 mm or less by the aerobic decomposition treatment passes through the second communication port 33 and flows into the solid-liquid separation chamber 30, and the second It flows into the aerobic treatment tank 27 through the overflow part 35.

(Aerobic treatment process)
The garbage suspension and the solubilized garbage suspension that have flowed into the aerobic treatment tank 27 from the drainage inflow chamber 29 and the aerobic decomposition tank 25 through the solid-liquid separation chamber 30, respectively, Aerobic treatment is performed in the aerobic treatment tank 27. The aerobic treatment is a treatment method in which various aerobic microorganisms are involved in the presence of dissolved oxygen to oxidize and remove organic substances, ammoniacal nitrogen, odors, and the like. That is, when the blower 43 is driven, air (oxygen) is supplied into the aerobic treatment tank 27 through the connecting pipe 62 and the diffuser pipe 61 (aeration treatment), and the like, such as crushed garbage that has undergone aerobic decomposition treatment. The aerobic microorganisms adhering to the surface of the organic matter and the aerobic microorganisms on the surface and inside of the carrier 71 are activated. The activated aerobic microorganisms decompose organic components contained in the garbage wastewater.

  Since the air diffuser 61 is disposed below the filter 52 of the filter support member 51, the bubbles ejected from the air outlet of the air diffuser 61 rise in the aerobic treatment tank 27 and come into contact with the filter 52 from below. . The bubbles are guided upward from below along the inclined filter 52. As a result, a counterclockwise swirling flow C2 indicated by an arrow in FIG. 1 is generated in the aerobic treatment tank 27. When the bubbles come into contact with the filter 52, it is possible to suppress the organic component in the garbage wastewater from adhering to the mesh of the filter 52. That is, by bringing bubbles into contact with the filter 52, the cleaning effect of the filter 52 is obtained, and clogging of the filter 52 is suppressed.

  In addition, undecomposed garbage crushed material and each carrier 71 contained in the wastewater drainage in the aerobic treatment tank 27 are also agitated by the swirling flow C2, and flow in the aerobic treatment tank 27 counterclockwise. Thereby, the garbage wastewater efficiently contacts the surface and the inside of the carrier 71, and the organic components in the garbage wastewater are decomposed by the aerobic microorganisms on the surface and inside of the carrier 71. Since the garbage crushed material contained in the wastewater drained after the aerobic decomposition treatment is solubilized, the aerobic treatment is performed efficiently. In addition, since the suspended crushed material and the settled crushed material in the drainage inflow chamber 29 do not flow into the aerobic treatment tank 27, the aerobic treatment performance is deteriorated due to the floating material adhering to or entangled with the surface of the carrier 71. Is also suppressed. For this reason, the aerobic processing performance in the aerobic processing tank 27 is maintained. Furthermore, each carrier 71 is stirred by the swirl flow C <b> 2, so that each carrier 71 moves upward from below while contacting the bottom wall 51 a of the filter support member 51. Thereby, the mesh cleaning effect of the bottom wall 51a is further improved.

(Discharge treatment process)
The treated water (garbage suspension) that has been microbially decomposed by the aerobic treatment passes through the mesh of the filter 52 of the filter support member 51 and flows out from the outflow port 36 to the outside (for example, sewer).

(Effect of embodiment)
Therefore, according to the present embodiment, the following effects can be obtained.
(1) The drainage inflow chamber 29 and the solid-liquid separation chamber 30 are separated by the third partition wall 28, and the third partition wall 28 prevents the transfer of floating crushed material in the garbage wastewater to the solid-liquid separation chamber 30. Is done. The floating crushed material in the wastewater drainage flows into the aerobic decomposition tank 25 through the first overflow part 34 of the first partition wall 23 together with the overflowing garbage wastewater in the drainage inflow chamber 29. For this reason, the floating crushed material in the garbage wastewater does not flow into the aerobic treatment tank 27. Further, the sedimentation crushed material is transferred to the aerobic decomposition tank 25 through the second communication port 33. Therefore, it is not necessary to separately provide a separation device for separating the garbage crushed material (solid matter) and the garbage suspension (liquid component) in the garbage waste water between the transfer pipe 14 and the treatment tank 22. Further, since the floating crushed material flows only into the aerobic decomposition tank 25 due to the overflow described above, it is not necessary to treat the floating crushed material that degrades the processing performance of the aerobic treatment tank 27 in the previous stage. That is, it is not necessary to provide an anaerobic tank in front of the aerobic treatment tank 27. Accordingly, the processing tank 22 can be downsized.

  (2) Garbage crushed material in the garbage wastewater flowing into the wastewater inflow chamber 29 is easily separated into floating crushed material and sedimented crushed material, and these suspended crushed material and sedimented crushed material flow into the solid-liquid separation chamber 30. In other words, it does not flow into the aerobic treatment tank 27. On the other hand, since a plurality of carriers 71 (microorganism carriers) for depositing aerobic microorganisms are suspended in the wastewater drainage of the aerobic treatment tank 27, the organic components are easily treated in the aerobic treatment tank 27. Is possible. For this reason, it is not necessary to ensure the capacity | capacitance of the said waste_water | drain inflow chamber 29 more than fixed based on the quantity of the garbage wastewater which flows into the waste_water | drain inflow chamber 29. FIG. That is, even when garbage wastewater having a capacity larger than that of the drainage inflow chamber 29 flows into the drainage inflow chamber 29, the garbage crushed material (sedimentation crushed material and floating crushed material) remains in the solid-liquid separation chamber 30, by extension. Since it does not flow out to the aerobic treatment tank 27, it is not necessary to consider the amount of inflow of garbage wastewater into the drainage inflow chamber 29. Accordingly, it is possible to reduce the size of the drainage inflow chamber 29 and consequently the solid-liquid separation tank 26.

  (3) The sedimentation crushed material in the garbage wastewater flowing into the solid-liquid separation tank 26 (drainage inflow chamber 29) settles in the drainage inflow chamber 29 and is transferred to the aerobic decomposition tank 25 through the second communication port 33. To do. The floating crushed material floating on the water surface of the solid-liquid separation tank 26 (drainage inflow chamber 29) was allowed to flow into the aerobic decomposition tank 25 due to overflow. For this reason, the separation apparatus which isolate | separates beforehand the solid content and liquid content in garbage wastewater, and transfers the said solid content to the aerobic decomposition tank 25 becomes unnecessary. In addition, when a separation device (not shown) for separating the solid content and the liquid content in the garbage wastewater is separately provided, and the solid content previously separated by the separation device is transferred to the aerobic decomposition tank 25 In comparison, the configuration becomes simple.

(4) In the aerobic decomposition tank 25, a diffuser pipe 41 is disposed below the bottom wall 31 of the solid-liquid separation tank 26, and bubbles blown from the diffuser pipe 41 are placed on the bottom wall 31 of the solid-liquid separation tank 26. Contact was made from below. Air bubbles from the air diffusion pipe 41 are guided from below to above by the bottom wall 31 of the solid-liquid separation tank 26, whereby a counterclockwise swirling flow C1 in FIG. For this reason, the stirring effect of the garbage crushed material and garbage suspension in the aerobic decomposition tank 25 is acquired, and aerobic decomposition processing efficiency can be improved.
(Another example)
In addition, you may implement the said embodiment by changing into the following other examples.

  In the present embodiment, the crushed sediment in the drainage inflow chamber 29 is transferred to the aerobic decomposition tank 25 through the second communication port 33 while being guided by the bottom wall 31 of the solid-liquid separation tank 26. The following may also be used. That is, one or more filters are provided on the bottom wall 31. By doing so, the agglomeration suspension in the aerobic decomposition tank 25 is smoothly transferred to the solid-liquid separation tank 26 (strictly speaking, the solid-liquid separation chamber 30). Untreated garbage crushed material in the aerobic decomposition tank 25 (undecomposed solid material having a particle size larger than the opening of the filter) to the solid-liquid separation tank 26 (drainage inflow chamber 29 and solid-liquid separation chamber 30). Advection is prevented.

  In the present embodiment, the treatment tank 22 is divided into three tanks of an aerobic decomposition tank 25, a solid-liquid separation tank 26, and an aerobic treatment tank 27 by the first partition wall 23 and the second partition wall 24. May be configured as separate bodies, and the treatment tank 22 may be configured by combining them. Even if it does in this way, the effect similar to (1)-(4) in this embodiment can be acquired.

(Appendix)
Next, a technical idea that can be grasped from the embodiment and another example will be added below.
(B) The bottom wall of the solid-liquid separation tank is configured by inclining the lower side of the first partition wall that partitions the aerobic decomposition tank and the solid-liquid separation tank toward the aerobic treatment tank, The first communication port is formed between the lower end edge of the suspended crushed material advancing prevention wall and the second communication port is formed between the lower end edge of the bottom wall and the second partition wall. The garbage processing system of 2.

  According to this configuration, in addition to the operation of the invention described in claim 2, since the solid-liquid separation tank is partitioned in the aerobic decomposition tank, further downsizing can be achieved. In addition, since the bottom wall of the solid-liquid separation tank is inclined toward the aerobic treatment tank, the sedimentation crushed material that settles in the drainage inflow chamber passes through the first communication port while being guided by the bottom wall of the solid-liquid separation tank. Further, the gas is smoothly transferred into the aerobic decomposition tank through the second communication port.

  (B) In the aerobic decomposition tank, an aerobic decomposition diffuser for sending air into the aerobic decomposition tank is disposed below the bottom wall of the solid-liquid separation tank, and the aerobic decomposition diffuser. The garbage disposal system according to item (a), wherein bubbles generated by the means are brought into contact with the bottom wall of the solid-liquid separation tank from below.

  According to this configuration, in addition to the operation of the invention described in (a), the bubbles generated by the aerobic decomposition aeration means are placed below the bottom wall of the solid-liquid separation tank. Contact from. As the bubbles are guided from below to above by the bottom wall of the solid-liquid separation tank, a swirling flow in a predetermined direction is generated in the aerobic decomposition tank. For this reason, the stirring effect of the garbage crushed material and garbage suspension in an aerobic decomposition tank is acquired.

  (C) A fluidized bed in which a plurality of microbial carriers for depositing aerobic microorganisms are suspended in the wastewater drainage of the aerobic treatment tank. The garbage processing system as described in any one of these.

  According to this configuration, in addition to the action of the invention according to any one of claims 1, 2, (a) and (b), the garbage which has been transferred to the aerobic treatment tank The solubilized components in the suspension are treated with aerobic microorganisms that are implanted in a microbial carrier.

  (D) A filter support member is provided so as to cover the outlet of the aerobic-treated garbage suspension in the aerobic treatment tank from the inside, and the bottom wall of the filter support member is provided obliquely and submerged. The bottom wall is provided with one or a plurality of filters, and an aerobic treatment aeration means for sending air into the aerobic treatment tank is disposed below the filter, and the aerobic treatment aeration means The garbage disposal system according to any one of claims 1, 2, (a), (b) and (c), wherein the generated bubbles are brought into contact with the filter from below.

  According to this configuration, in addition to the action of the invention according to any one of claims 1, 2, (a), (b) and (c), the inside of the aerobic treatment tank The aerobic treated garbage suspension flows out to the outside through the outlet. At this time, the outflow of solid matter (undecomposed raw garbage crushed material, excess sludge, etc.) is suppressed by a filter provided at the outlet of the aerobic treatment tank. In addition, bubbles from the air diffuser come into contact with the filter of the filter support member from below. For this reason, clogging of the filter is suppressed.

The schematic block diagram of the garbage processing system of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Garbage disposal system, 12 ... Crusher, 14 ... Transfer pipe (transfer means),
22 ... treatment tank, 23 ... first partition, 24 ... second partition, 25 ... aerobic decomposition tank,
26 ... solid-liquid separation tank, 27 ... aerobic treatment tank, 28 ... third partition (floating crushed material advection prevention wall),
DESCRIPTION OF SYMBOLS 29 ... Waste water inflow chamber, 30 ... Solid-liquid separation chamber, 31 ... Bottom wall of solid-liquid separation tank, 32 ... 1st communication port, 33 ... 2nd communication port, 34 ... 1st overflow part, 35 ... 2nd overflow part ,
36 ... Outlet, 41, 61 ... Air diffuser (air diffuser), 51 ... Filter support member,
51a ... bottom wall, 52 ... filter, 71 ... carrier (microorganism carrier).

Claims (2)

In a garbage processing system equipped with a treatment tank for purifying garbage wastewater containing garbage crushed material crushed by a crusher,
The treatment tank is
A solid-liquid separation tank that separates the garbage wastewater transferred by the transfer means into a garbage crushed material that is solid and a garbage suspension that is a liquid;
An aerobic decomposition tank that is disposed in the previous stage of the solid-liquid separation tank and is solubilized with the garbage crushed material transferred by the solid-liquid separation tank,
Only the garbage suspension in the solid-liquid separation tank and the solubilized garbage suspension in the aerobic decomposition tank are transferred to the both ends of the solid-liquid separation tank. A garbage disposal system equipped with an aerobic treatment tank for aerobic treatment. The treatment tank is divided into an aerobic decomposition tank, a solid-liquid separation tank and an aerobic treatment tank by a first partition and a second partition,
The solid-liquid separation tank is a solubilization in the waste water inflow chamber in which the garbage wastewater from the transfer means is transferred by the floating crushed material advancing prevention wall, the garbage suspension in the solid-liquid separation tank, and the aerobic decomposition tank. It is further divided into a solid-liquid separation chamber to which the treated garbage suspension is transferred,
The floating crushed material advancing prevention wall is provided with a first communication port for communicating the drainage inflow chamber and the solid-liquid separation chamber at the bottom thereof,
The first partition is provided with a second communication port for communicating the solid-liquid separation chamber and the aerobic decomposition tank at the bottom thereof, and the upper portion of the first partition is overflowed with a drainage inflow chamber accompanying the inflow of garbage wastewater. Provided with a first overflow portion that can transfer the waste garbage suspension to the aerobic decomposition tank,
2. A second overflow portion is provided at the upper portion of the second partition wall, which allows a waste suspension of an overflow of a solid-liquid separation chamber accompanying the inflow of garbage waste water to be transferred to an aerobic treatment tank. The garbage disposal system described in 1.

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