JP2003170144A - Garbage disposal system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a garbage disposal system which can be miniaturized. <P>SOLUTION: Water to be treated and containing inorganic material components after aerobic treatment is separated into inorganic materials and liquid by a membrane separation chamber 24. Thereby, a sludge settling tank is eliminated and the miniaturization of the entire garbage disposal system 11 is attained. Solid which are contained in the water to be treated and the volume of which is reduced by the aerobic treatment are in dehydrated with a filter 81, and waste treatment is achieved in the state. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw garbage treatment system for treating water to be treated containing raw garbage crushed by a crusher.

[0002]

2. Description of the Related Art As this kind of garbage processing system,
For example, a configuration as disclosed in Japanese Patent Laid-Open No. 2000-33362 is known. This food waste treatment system temporarily stores kitchen wastewater containing crushed food waste that has been crushed by a crusher in a storage tank and causes it to settle. To separate into solid and liquid. The separated solid content is introduced into a composting device and decomposed into organic matter by microorganisms to be composted. Similarly, the liquid content is introduced into the aeration tank, and the aeration treatment activates aerobic microorganisms to decompose organic components. Then, the water to be treated, which has been aerobically treated in the aeration tank, is allowed to flow naturally into the sedimentation separation tank to precipitate the excess flocculated sludge. The supernatant is discharged to the sewer, and the sludge that has settled is returned to the storage tank by an air lift or the like.

[0003]

However, the conventional food waste processing system has the following problems. That is, after aerobic treatment, it is necessary to install a sedimentation separation tank having a predetermined treatment volume as equipment for precipitating the flocculated excess sludge contained in the water to be treated and obtaining only the supernatant that can be discharged to the sewer. was there. For this reason, it has been a cause of hindering the miniaturization of the entire garbage processing system.

Further, in order to prevent the overflow from the storage tank, the processing volume of the storage tank must be equal to or more than the amount of water to be treated containing the crushed raw garbage generated in one operation of the crusher. was there. Therefore, there is a limit to the miniaturization of the storage tank, which is also a factor that hinders the miniaturization of the whole food waste processing system.

The present invention has been made to solve the above problems, and an object thereof is to provide a garbage disposal system which can be downsized.

[0006]

According to a first aspect of the present invention, there is provided a drainage storage tank for storing water to be treated containing raw garbage crushed by a crusher, and the drainage storage tank.
By the aerobic treatment tank for aerobically treating the water to be treated transferred by the transfer means, the membrane separation chamber for purifying the aerobic treated water that has flowed in from the aerobic treatment tank, and the membrane separation chamber The discharging means for discharging the purified water, the sludge collecting section for solid-liquid separating the concentrated water to be treated transferred from the membrane separation chamber by the second transfer means, and the sludge collecting section It is a gist of the present invention to provide a returning means for returning the removed treated water to the drainage storage tank.

According to a second aspect of the present invention, in the garbage treatment system according to the first aspect, the transfer amount per unit time of the first transfer means is a unit of the water to be treated flowing into the waste water storage tank. The gist of the invention is to provide the control means for controlling the first transfer means so that the flow rate becomes larger than the inflow rate per hour.

According to a third aspect of the present invention, in the garbage treatment system according to the first or second aspect, a first water level sensor for detecting a water level in the waste water storage tank is provided, and the first water level sensor is provided. When the water level in the wastewater storage tank reaches the preset rising position, the control means drives the first transfer means to bring the water level in the wastewater storage tank to a preset descending position. When it descends, the control means stops the first transfer means, and when the water level in the drainage storage tank reaches the preset upper limit position beyond the elevated position, the control means controls the crusher. The point is that it is stopped.

According to a fourth aspect of the invention, in the garbage treatment system according to any one of the first to third aspects, a second water level sensor for detecting the water level in the membrane separation chamber is provided, When the water level in the membrane separation chamber detected by the second water level sensor reaches a preset rising position, the control means drives the discharging means, and similarly the water level in the membrane separation chamber is in a preset descending position. When descending to
The control means stops the discharging means, and also when the water level in the membrane separation chamber reaches the preset upper limit position beyond the rising position, the control means stops the first transfer means. This is the gist.

According to a fifth aspect of the present invention, in the garbage treatment system according to the fourth aspect, the control means further stops the crusher when the water level in the membrane separation chamber reaches the upper limit position. The point is what you did.

According to a sixth aspect of the present invention, in the garbage treatment system according to any one of the first to fifth aspects, the membrane separation chamber is aerobically treated by the aerobic treatment tank. The gist of the present invention is that it is provided with a membrane filtration device for filtering the water to be treated, and the membrane filtration device is provided with a filtration membrane made of ceramics.

According to a seventh aspect of the present invention, in the garbage treatment system according to any one of the first to sixth aspects, the sludge collecting section is transferred by the second transfer means. The gist of the present invention is to provide a filter capable of storing the solid content while filtering the water to be treated, and enabling the filter to be attached to and detached from the sludge collection unit. (Operation) According to the invention described in claim 1, the water to be treated containing the crushed raw garbage crushed by the crusher is stored in the drainage storage tank. The water to be treated in the waste water storage tank is transferred to the aerobic treatment tank by the first transfer means and aerobically treated by the aerobic treatment tank. The water to be treated that has undergone aerobic treatment flows into the membrane separation chamber and is purified by the membrane separation chamber. The water purified by the membrane separation chamber is discharged by the discharging means. The water to be treated in the membrane separation chamber thus concentrated is transferred to the sludge collection section by the second transfer means, and is solid-liquid separated by the sludge collection section. The treated water from which the solid content has been removed by the sludge collection unit is returned to the drainage storage tank by the returning means.

Since the water to be treated which has undergone aerobic treatment is separated into the solid content and the liquid content by the membrane separation chamber, it is not necessary to precipitate the solid content in the water to be treated in, for example, a precipitation separation tank.
Therefore, the sedimentation separation tank is not required, and the whole garbage processing system can be downsized.

According to the invention of claim 2, claim 1
In addition to the operation of the garbage processing system described in 1.
The transfer amount of the transfer means per unit time becomes larger than the inflow amount of the water to be treated flowing into the waste water storage tank per unit time. For this reason, the processing volume of the waste water storage tank is reduced by the operation of the crusher.
Even if the amount of water to be treated containing crushed raw garbage generated in batches is made smaller, the water to be treated will not overflow from the waste water storage tank. Therefore, the size of the waste water storage tank can be reduced as compared with the case where the processing volume of the waste water storage tank is set to be equal to or more than the amount of water to be treated containing crushed raw garbage generated in one operation of the crusher.

According to the invention of claim 3, claim 1
Alternatively, in addition to the operation of the garbage disposal system according to claim 2, when the water level in the drainage storage tank detected by the first water level sensor reaches a preset rising position, the first
The transfer means is driven. Similarly, the first transfer means is stopped when the water level in the drainage storage tank is lowered to a preset lowered position. Therefore, the water level in the drainage storage tank is adjusted between the ascending position and the descending position to prevent overflow and depletion of the drainage storage tank. Further, when the water level in the drainage storage tank detected by the first water level sensor exceeds the rising position and reaches a preset upper limit position, the crusher is stopped. For this reason, when the water level in the drainage storage tank exceeds the upper limit position, the water to be treated containing the crushed raw garbage is prevented from flowing into the drainage storage tank.

According to the invention of claim 4, claim 1
In addition to the action of the garbage treatment system according to any one of claims 3 to 3, the discharge is performed when the water level in the membrane separation chamber detected by the second water level sensor reaches a preset rising position. The means are driven. Similarly, the discharging means is stopped when the water level in the membrane separation chamber is lowered to a preset lowered position. Therefore, the water level in the membrane separation chamber is adjusted between the ascending position and the descending position, and overflow and depletion of the membrane separation chamber are prevented. Further, when the water level in the membrane separation chamber detected by the second water level sensor exceeds the rising position and reaches a preset upper limit position, the first transfer means is stopped. Therefore, in an abnormal case where the water level in the membrane separation chamber exceeds the upper limit position, the water to be treated containing the crushed garbage is prevented from flowing into the membrane separation chamber through the aerobic treatment tank.

According to the invention of claim 5, claim 4
In addition to the operation of the garbage treatment system according to [4], when the water level in the membrane separation chamber reaches the upper limit position, the crusher is further stopped. Therefore, when the water level in the membrane separation chamber exceeds the upper limit position, the water to be treated containing the crushed raw garbage is prevented from flowing into the drainage storage tank.

According to the invention of claim 6, claim 1
In addition to the operation of the garbage treatment system according to any one of claims 5 to 5, the water to be treated which has been aerobically treated by the aerobic treatment tank is a membrane filtration device provided in the membrane separation chamber. Purified by. That is, the water to be treated is filtered by the ceramic filtration membrane provided in the membrane filtration device. By making the filtration membrane made of ceramics, the product life is improved as compared with, for example, a filtration membrane made of a synthetic resin material. This is because the filtration membrane made of ceramics can be back-washed and can be repeatedly used by regularly back-washing the filtration membrane.

According to the invention of claim 7, claim 1
In addition to the operation of the garbage treatment system according to any one of claims 6 to 6, the water to be treated transferred by the second transfer means is filtered by the filter of the sludge collecting section. The liquid component in the water to be treated passes through the filter, and the solid component is stored in the filter. The solid content stored in the filter can be easily taken out to the outside by removing the filter from the sludge collecting section.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment in which the present invention is embodied in a garbage processing system will be described below with reference to FIG.

As shown in FIG. 1, the garbage processing system 1
1 is a crusher 12 provided at the bottom of the kitchen sink
And a ground-based processing tank 13 installed outdoors. The crusher 12 and the treatment tank 13 are connected to each other via a pipe 14, and drainage (hereinafter, referred to as “water to be treated”) containing crushed raw garbage crushed by the crusher 12 is a pipe. It is supplied into the processing tank 13 via 14.

The finer the garbage, the more the surface area of the whole garbage can be secured, and the aerobic treatment efficiency described later is improved. The range of the average particle size of the crushed raw garbage is 0.1 mm to 6 mm, and the desirable range is 0.1 to 5 m.
m, the optimum range is 0.1 to 3.5 mm, and in the present embodiment, the crusher 12 is configured so that the average particle size of the crushed raw garbage is about 3.0 mm. If it exceeds this range, the processing efficiency of raw garbage decreases.

(Treatment Tank) As shown in FIG.
The inside of the main body case 21 is divided into a drainage storage tank 22 and an aerobic treatment tank 23 by a first partition wall 31. Furthermore, the inside of the aerobic treatment tank 23 is divided into two rooms by the second partition wall 32, one room is a room for mainly performing aerobic treatment, and the other room is a membrane separation as a discharge facility to sewer. It is defined as room 24. A sludge collection unit 25 is arranged above the drainage storage tank 22. The projecting height of the first partition wall 31 from the inner bottom surface of the main body case 21 is set to be larger than the projecting height of the second partition wall 32 from the inner bottom surface of the main body case 21, so that the processing target overflowed from the aerobic treatment tank 23 is processed. Water always flows into the membrane separation chamber 24.

(Drainage Storage Tank) The drainage storage tank 22 stores the water to be treated containing the crushed raw garbage crushed by the crusher 12. The volume of the drainage storage tank 22 (the volume when the water level detected by the first water level sensor 35 described later reaches a rising position Hc described later) is the amount of crushed garbage generated in one operation of the crusher 12. It is set smaller than the amount of water to be treated.

One end of a transfer pipe 33 is introduced into the water to be treated stored in the drainage storage tank 22. The other end of the transfer pipe 33 is led out from the drainage storage tank 22 and is positioned so as to face the upper opening of the aerobic treatment tank 23. A transfer pump 34 is provided on the transfer pipe 33.

Inside the drainage storage tank 22, the drainage storage tank 22 is provided.
A first water level sensor 35 for detecting the water level inside is provided. In the drainage storage tank 22, one end of a first overflow pipe 36 is introduced above the first water level sensor 35, and the other end of the first overflow pipe 36 is connected to the main body case 21.
It penetrates through the side wall in a watertight manner and is led to the outside. First
One end side of the overflow pipe 36 is formed in a funnel shape, and its inflow port faces upward.

(Aerobic treatment tank) The aerobic treatment tank 23 is for aerobically treating the water to be treated which has been transferred through the transfer pipe 33 by driving the transfer pump 34. A first air diffusing pipe 41 is arranged at the inner bottom of the aerobic treatment tank 23, and a blower 43 is connected to the first air diffusing pipe 41 via a connecting pipe 42. By driving the blower 43, air (oxygen) is supplied into the aerobic treatment tank 23 through the first air diffusing pipe 41, and one end of the first branch pipe 44 and the second branch pipe 45 is provided in the middle of the connecting pipe 42. Are connected respectively. The other ends of the first and second branch pipes 44 and 45 have a first air lift pipe 71 and a second air lift pipe 7 which will be described later, respectively.
It is connected in the middle of 2.

(Membrane Separation Chamber) In the aerobic treatment tank 23, inside the membrane separation chamber 24 provided through the second partition 32,
The membrane filtration device 51 is arranged so as to be immersed in the water to be treated in the membrane separation chamber 24.

The membrane filtration device 51 is provided with a plurality of sets of filtration membrane units 52 each including a pair of filtration membranes 52a arranged to face each other. The filtration membrane 52a is formed of ceramics in a plate shape. One end of the first drain pipe 53 is introduced between the both filtration membranes 52a of the filtration membrane unit 52. The other end of the first drainage pipe 53 is connected to one end of the second drainage pipe 54. The other end of the second drain pipe 54 penetrates the side wall of the main body case 21 in a watertight manner and is connected to the sewer. A suction pump 55 is provided on the second drain pipe 54 so as to be located above the membrane separation chamber 24.

A second air diffusing tube 61 is provided at the inner bottom of the membrane separation chamber 24.
A blower 63 is connected to the second air diffusing pipe 61 via a connecting pipe 62. By driving the blower 63, air (oxygen) is supplied into the membrane separation chamber 24 through the second air diffusing tube 61, and aerobic microorganisms are activated.

Further, in the membrane separation chamber 24, the membrane separation chamber 2
The 2nd water level sensor 64 which detects the water level in 4 is provided. In the membrane separation chamber 24, one end of the second overflow pipe 65 is introduced above the second water level sensor 64, and the other end of the second overflow pipe 65 is connected to the main body case 21.
It penetrates through the side wall in a watertight manner and is led to the outside. Second
One end side of the overflow pipe 65 is formed in a funnel shape, and its inflow port faces upward.

One ends of a first air lift pipe 71 and a second air lift pipe 72 are introduced into the water to be treated in the membrane separation chamber 24. The other end of the first air lift pipe 71 is connected to a sludge collecting unit 25 described later. The other end of the second air lift pipe 72 is located so as to face the upper opening of the aerobic treatment tank 23. First and second air lift pipes 7
The first and second branch pipes 44 and 45 are connected in the middle of the membrane separation chambers 24 and 1, 72, respectively.

(Sludge Collection Section) The sludge collection section 25 separates the water to be treated concentrated in the membrane separation chamber 24 into solid and liquid. A bag-shaped filter 81 is removably disposed in the sludge collecting unit 25. The filter 81 is formed in a mesh shape so that only the liquid component (filtered water) of the water to be treated supplied through the first overflow pipe 36 can pass through. The filter 81 is capable of storing solids in the water to be treated. The bottom surface of the sludge collecting unit 25 is arranged above the surface of the water to be treated in the drainage storage tank 22. The inside of the sludge collection unit 25 and the inside of the drainage storage tank 22 are in communication with each other via a return pipe 82, and the liquid component in the water to be treated filtered by the filter 81 is returned to the return pipe 82.
It is returned to the drainage storage tank 22 via. The collected matter of the filter 81 is appropriately disposed of periodically or according to the collected amount.

(Electrical Configuration) Next, the electrical configuration of the garbage processing system 11 will be described. As shown in FIG. 2, the garbage processing system 11 includes a control device 91. The control device 91 controls the entire garbage processing system 11 as a whole. A first water level sensor 35, a second water level sensor 64, a transfer pump 34, a suction pump 55, a blower 43, a blower 63, and a crusher 12 are connected to the control device 91 via input / output interfaces (not shown). ing.

The control device 91 drives and controls the transfer pump 34 on the basis of the water level in the waste water storage tank 22 detected by the first water level sensor 35, and judges whether or not the crusher 12 can be used, and the crushing is performed. Control the machine 12. Further, the control device 91 drives and controls the suction pump 55 and the transfer pump 34 based on the water level in the membrane separation chamber 24 detected by the second water level sensor 64, and determines whether or not the crusher 12 can be used. And controls the crusher 12.

The transfer pump 34 constitutes a first transfer means for transferring the water to be treated in the waste water storage tank 22 to the aerobic treatment tank 23. The suction pump 55 constitutes a discharge means for discharging the water purified by the membrane separation chamber 24. Blower 43
Constitutes a second transfer means for transferring the water to be treated concentrated in the membrane separation chamber 24 to the sludge collecting section 25. The return pipe 82 constitutes a return means for returning the water to be treated from which the solid content has been removed by the sludge collection unit 25 to the drainage storage tank 22. Control device 91
Constitutes a control means.

(Operation of Embodiment) Next, the operation of the food waste processing system configured as described above will be described. The trash that is discharged together with the drainage from the drain of the kitchen sink is crushed into a predetermined size by the crusher 12. Kitchen wastewater (water to be treated) containing the crushed raw garbage crushed by the crusher 12 is temporarily stored in the drainage storage tank 22. Then, the water level in the wastewater storage tank 22 detected by the first water level sensor 35 is set to the preset rising position Hc.
When it reaches, the control device 91 drives the transfer pump 34. Then, the water to be treated in the drainage storage tank 22 is
It is transferred to the aerobic treatment tank 23 via the transfer pipe 33.

At this time, the controller 91 determines that the transfer amount P of the transfer pump 34 per unit time is the drainage storage tank 2
The transfer pump 34 is driven and controlled so as to be larger than the inflow amount Q of the untreated water flowing into the unit 2 per unit time.
Therefore, the storage volume of the drainage storage tank 22 is equal to that of the crusher 12.
Even if the amount of the water to be treated containing the crushed raw garbage generated in one operation of is smaller than the amount of the water to be treated, the water to be treated does not overflow from the drainage storage tank 22.

The water to be treated transferred into the aerobic treatment tank 23 is aerobically treated by the aerobic treatment tank 23. The aerobic treatment is a method in which various aerobic microorganisms are involved in the presence of dissolved oxygen to oxidatively decompose and remove organic substances, ammoniacal nitrogen, odor, and the like, and in the present embodiment, , Oxidative decomposition of organic matter components in the water to be treated in a state where biological flocs are suspended by aeration. That is,
By driving the blower 43, air (oxygen) is transferred to the first diffuser 41
Is supplied to the aerobic treatment tank 23 through the (aeration treatment),
This activates aerobic microorganisms. Organic components contained in the water to be treated are decomposed by the activated aerobic microorganisms.

In the aerobic treatment tank 23, the water to be treated which has been subjected to the aerobic treatment flows into the membrane separation chamber 24 when the water level exceeds the second partition wall 32 located on the opposite side of the transfer pipe 33. Then, aerobic treatment is further performed in the membrane separation chamber 24. In the membrane separation chamber 24, the second water level sensor 6
When the water level in the membrane separation chamber 24 detected by No. 4 reaches the preset rising position Hf (see FIG. 1), the suction pump 55 is driven by the control device 91.

Inside each filtration membrane unit 52 (both filtration membranes 5
The inside of 2a) is sucked by the suction pump 55, so that a filtration driving force is generated from the outside to the inside of both filtration membranes 52a. The water to be treated in the membrane separation chamber 24 is filtered by the differential pressure generated by driving the suction pump 55. The liquid component (filtered water) in the water to be treated that has passed through the filtration membrane 52a is led out to the outside via the first drain pipe 53 and the second drain pipe 54, whereby the water to be treated in the membrane separation chamber 24 is concentrated. To be done. That is, the MLSS (active sludge suspended matter) concentration of the water to be treated stored in the membrane separation chamber 24 increases.

The blower 63 is driven together with the driving of the suction pump 55, and air (oxygen) is supplied into the membrane separation chamber 24 through the second air diffusing pipe 61. As a result, the aerobic microorganisms are activated and the organic component contained in the water to be treated in the membrane separation chamber 24 is decomposed. In addition, the membrane separation chamber 24
Due to the air supplied to the inside, an upward flow is generated in the water to be treated in the membrane separation chamber 24, the water to be treated in the membrane separation chamber 24 is agitated, and the surface of the filtration membrane unit 52 is cleaned and Oxygen is supplied to the water to be treated. Further, the accumulation of sludge on the outer surface of the filtration membrane 52a is prevented.

By driving the blower 43, the first and second
First and second air lift pipes 7 via branch pipes 44, 45
When air is supplied in the middle of 1, 72, the membrane separation chamber 24
The concentrated water to be treated therein is transferred to the sludge collecting section 25 via the first air lift pipe 71 and returned to the aerobic treatment tank 23 via the second air lift pipe 72. The water to be treated returned to the aerobic treatment tank 23 is repeatedly subjected to the aerobic treatment and the membrane separation treatment as described above.

The water to be treated supplied to the sludge collecting section 25 is solid-liquid separated by the sludge collecting section 25. That is, the treated water is used as a bag-shaped filter 8 mounted in the sludge collecting section 25.
The solid content in the water to be treated that has been filtered and dehydrated by No. 1 is stored in the filter 81. The solid content in the water to be treated is stored in the filter 81. The liquid component in the water to be treated (the water to be treated in which the solid component has been removed by the filter 81) passes through the filter 81 and the return pipe 82, and then the waste water storage tank 22.
Returned inside.

By repeating the above-mentioned treatment, the waste water is purified and the amount of raw garbage is reduced. During such garbage processing, when the water level in the drainage storage tank 22 detected by the first water level sensor 35 is lowered to the preset lowering position Lc, the control device 91 stops the transfer pump 34. Let This prevents the drainage storage tank 22 from being depleted.

When the water level in the drainage storage tank 22 detected by the first water level sensor 35 exceeds the rising position Hc and reaches a preset upper limit position Hcmax,
The control device 91 stops the use of the crusher 12. In the stopped state of the crusher 12, the water flowing in from the drain of the kitchen sink flows into the drainage storage tank 22, but the raw garbage dropped from the drain of the kitchen sink remains in the crusher 12. Therefore, kitchen wastewater containing untreated raw garbage (crushed raw garbage and non-crushed raw garbage) will not flow into the drainage storage tank 22.

Further, when the water level in the membrane separation chamber 24 detected by the second water level sensor 64 is lowered to the preset lowering position Lf, the controller 91 stops the suction pump 55. This prevents the membrane separation chamber 24 from being depleted.

Further, when the water level in the membrane separation chamber 24 detected by the second water level sensor 64 exceeds the rising position Hf and reaches a preset upper limit position Hfmax,
The control device 91 stops the transfer pump 34,
The use of the crusher 12 is stopped. As a result, the untreated raw water-containing treated water is prevented from flowing into the aerobic treatment tank 23 and further into the membrane separation chamber 24, and overflow from the membrane separation chamber 24 is prevented.

(Effect of Embodiment) Therefore, according to this embodiment, the following effects can be obtained. (1) By treating the treated water after the aerobic treatment (that is, after the majority of the organic components are decomposed and reduced) by the membrane filtration device 51, a solid content and a liquid content that can be discharged into the sewer are obtained. So that they can be reliably separated. Therefore, it is not necessary to precipitate the solid content contained in the water to be treated in, for example, a precipitation separation tank. Therefore, the sludge settling tank is not required, and the whole garbage processing system 11 can be downsized.

(2) Further, since the water to be treated is treated by the membrane filtration device 51, the water to be treated containing the crushed raw garbage is directly supplied to the aerobic treatment tank 23 to perform the aerobic treatment. be able to. Therefore, it is not necessary to perform solid-liquid separation prior to aerobic treatment. It is not necessary to perform anaerobic treatment prior to aerobic treatment.

(3) The second partition 32 in the aerobic treatment tank 23
By providing the water to be treated, the water to be treated introduced from the waste water storage tank 22 through the transfer pipe 33 is retained in the room having the first air diffusing pipe 41 and directly flows into the room having the membrane filtration device 51. There is no. Therefore, the solid content can be reliably reduced by the aerobic treatment. Further, even in the room having the membrane filtration device 51, by providing the second air diffusing pipe 61, the solid content can be further reduced by the aerobic treatment.

(4) The controller 91 controls so that the transfer amount P of the transfer pump 34 per unit time becomes larger than the inflow amount Q of the water to be treated flowing into the aerobic treatment tank 23 per unit time. The transfer pump 34 is drive-controlled. Therefore, the processing volume of the waste water storage tank 22 is reduced to the crusher 12
Even if the amount of water to be treated containing the crushed raw garbage generated in one operation is smaller than that of the water to be treated 22
Never overflows. Therefore, the wastewater storage tank 22 can be downsized as compared with the case where the treatment volume of the wastewater storage tank 22 is set to be equal to or more than the amount of water to be treated containing the crushed raw garbage generated in one operation of the crusher 12. . As a result, the whole garbage processing system 11 can be downsized.

(5) The rising position H in which the water level in the drainage storage tank 22 detected by the first water level sensor 35 is preset
The transfer pump 34 is driven when it reaches c, and the transfer pump 34 is stopped when the water level in the drainage storage tank 22 also descends to a preset descending position Lc.
Therefore, the water level in the drainage storage tank 22 is adjusted between the ascending position Hc and the descending position Lc. Therefore, overflow of the drainage storage tank 22 can be prevented, and depletion of the drainage storage tank 22 can be prevented.

(6) When the water level in the drainage storage tank 22 detected by the first water level sensor 35 exceeds the rising position Hc and reaches the preset upper limit position Hcmax, the use of the crusher 12 is stopped. I decided to do it. Therefore, when the water level in the waste water storage tank 22 exceeds the upper limit position Hcmax, it is possible to prevent the water to be treated containing the crushed raw garbage from flowing into the waste water storage tank 22.

(7) The water level in the membrane separation chamber 24 detected by the second water level sensor 64 is a preset rising position Hf.
When the water level in the membrane separation chamber 24 reaches the preset lowering position Lf, the suction pump 55 is stopped when the suction pump 55 is driven. Therefore, the water level in the membrane separation chamber 24 is adjusted between the ascending position Hf and the descending position Lf. Therefore, the membrane separation chamber 24
Of the membrane separation chamber 24 and the membrane separation chamber 24 can be prevented from being depleted.

(8) When the water level in the membrane separation chamber 24 detected by the second water level sensor 64 exceeds the rising position Hf and reaches the preset upper limit position Hfmax, the transfer pump 34 is stopped. I did it. Therefore, in an abnormal case where the water level in the membrane separation chamber 24 exceeds the upper limit position Hfmax, the water to be treated containing the crushed food waste is prevented from flowing into the membrane separation chamber 24 via the aerobic treatment tank 23. It can be prevented.

(9) Furthermore, when the water level in the membrane separation chamber 24 reaches the upper limit position Hfmax, the use of the crusher 12 is also stopped. Therefore, in an abnormal case where the water level in the membrane separation chamber 24 exceeds the upper limit position Hfmax,
It is possible to prevent the water to be treated containing the crushed raw garbage from flowing into the drainage storage tank 22. Incidentally, the water to be treated (kitchen wastewater) that does not contain the crushed raw garbage can flow into the wastewater storage tank 22.

(10) The filtration membrane 52a of the membrane filtration device 51 is made of ceramics. Therefore, the product life is improved as compared with, for example, a filtration membrane made of a synthetic resin material. This is because the filtration membrane 52a made of ceramics can be backwashed, and can be repeatedly used by periodically backwashing the filtration membrane 52a. By the way, it is difficult to backwash a filtration membrane made of a synthetic resin material because of insufficient strength.

(11) The sludge collecting section 25 filters the water to be treated transferred through the first air lift pipe 71,
The bag-shaped filter 81 that collects and stores the solid content in the water to be treated is provided so as to be located above the water storage surface of the drainage storage tank 22 and detachable. Therefore, in the internal space of the drainage storage tank 22, the solid matter stored in the bag-shaped filter 81 is always maintained in a dehydrated state. Therefore, there is no dripping of water when the filter 81 is removed, and the solid content in the water to be treated collected by the filter 81 can be easily discarded. Further, the sludge collecting section 25 is supplied with the water to be treated after the aerobic treatment in the aerobic treatment tank 23 and the membrane separation chamber 24. Therefore, the solid content collected by the filter 81 is considerably reduced as compared with the solid content in the water to be treated which is poured into the drainage storage tank 22 through the pipe 14.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. The present embodiment differs from the first embodiment in the configuration inside the aerobic treatment tank 23. Therefore, the same members as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 3, a baffle plate 101 is provided in the aerobic treatment tank 23 in place of the second partition 32 in the first embodiment. The protruding height of the baffle plate 101 from the inner bottom surface of the main body case 21 is lower than that of the first partition wall 31, and the baffle plate 101 is formed with a plurality of circulation holes 101a and 101b. Then, in the two chambers inside the aerobic treatment tank 23 partitioned by the baffle plate 101, the membrane filtration device 51, the suction pump 55, and the Two air diffusers 61, a first air lift pipe 71, etc. are provided. The water level sensor 102 detects the water level in the aerobic treatment tank 23, and has the same function as the second water level sensor 64 in the first embodiment.

Therefore, according to this embodiment, the following effects can be obtained. (1) By providing the baffle plate 101 in the aerobic treatment tank 23, the same effect as the effect (3) in the first embodiment can be obtained.

(2) Since the inlet (outlet) of the transfer pipe 33 is provided in the vicinity of the first partition wall 31 of the aerobic treatment tank 23, the drainage storage tank 22 is continuously supplied via the transfer pipe 33. The transferred water to be treated can be further retained in the room having the first air diffusing pipe 41 in the aerobic treatment tank 23.

(3) Since the second air lift pipe 72 and the second branch pipe 45 are omitted, the garbage processing system 11
The configuration can be simplified. (Other example) The above-described embodiments may be modified and implemented as follows.

In the first and second embodiments, the processing tank 13
Although the above-mentioned is a type installed on the ground, it may be a buried type in which the treatment tank 13 is buried underground and installed. In the first and second embodiments, the filter 81 is attachable to and detachable from the sludge collecting unit 25, but may be detachable. Even in this case, the water to be treated transferred via the first air lift pipe 71 can be filtered and the solid content in the water to be treated can be stored. In this case, regular maintenance by the service person, that is, the sludge collection unit 2
It is necessary to take out the stored material in 5.

In the first and second embodiments, the membrane separation chamber 2
When the water level in 4 exceeds the rising position Hf and reaches the preset upper limit position Hfmax, the transfer pump 34 and the crusher 12 are each stopped, but without stopping the crusher 12. Alternatively, only the transfer pump 34 may be stopped. Even in this case, the water to be treated containing the crushed raw garbage can be prevented from flowing into the membrane separation chamber 24 through the aerobic treatment tank 23.

In the first and second embodiments, the anaerobic treatment may be performed in the sludge collecting section 25. The anaerobic treatment is a method of decomposing and removing organic substances using anaerobic microorganisms that do not require oxygen or cannot grow in the presence of oxygen. In this case, the treatment time (residence time) for performing the anaerobic treatment is set in advance, and after this treatment time has elapsed, the filtered water from the filter 81 is returned to the drainage storage tank 22. By doing so, the organic component remaining in the water to be treated supplied into the sludge collecting section 25 is decomposed by the anaerobic microorganisms.

In the first and second embodiments, the water to be treated in the waste water storage tank 22 is transferred to the aerobic treatment tank 23 by driving the transfer pump 34. However, it may be transferred by an air lift pump. May be. In this case, the transfer pump and the transfer pipe 3 are respectively omitted, and one end of the air lift pipe is introduced into the drainage storage tank 22, and the other end is also positioned so as to face the upper opening of the aerobic treatment tank 23. Let Then, a blower is connected in the middle of the air lift pipe. Even in this case, the water to be treated in the waste water storage tank 22 can be transferred into the aerobic treatment tank 23.

In the first and second embodiments, the filter 8
Although 1 is formed in a bag shape, it may be formed in a cylindrical shape having an open top, for example. Even in this case, the water to be treated is filtered and the solid content in the water to be treated is stored in the filter.

(Supplementary Notes) Next, the technical ideas that can be understood from the above-described embodiment and other examples will be additionally described below. -The garbage treatment system according to any one of claims 1 to 7, wherein anaerobic treatment is performed in the sludge collection unit.

The average particle size of the crushed raw garbage is 3.5 m
The garbage processing system according to any one of claims 1 to 7, wherein the crusher is configured to have a m or less.

[0072]

According to the present invention, since the water to be treated after the aerobic treatment is treated in the membrane separation chamber, the garbage treatment system can be downsized.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a food waste processing system according to a first embodiment.

FIG. 2 is a block diagram showing an electrical configuration of the garbage processing system according to the first embodiment.

FIG. 3 is a schematic configuration diagram of a food waste processing system according to a second embodiment.

[Explanation of symbols]

11 ... Garbage treatment system, 12 ... Crusher, 13 ... Treatment tank, 22 ... Waste water storage tank, 23 ... Aerobic treatment tank, 24 ... Membrane separation chamber, 25 ... Sludge collection section, 34 ... First transfer means Constituting transfer pump, 35 ... First water level sensor, 43 ... Second
Blowers constituting transfer means, 51 ... Membrane filtration device, 52 ...
Filtration membrane unit, 52a ... Filtration membrane, 55 ... Suction pump that constitutes discharge means, 64 ... Second water level sensor, 81 ... Filter, 82 ... Return pipe that constitutes return means, 91 ... Control device that constitutes control means , Hc ... raised position of drainage storage tank, Lc ... lowered position of drainage storage tank, Hcmax ... upper limit position of drainage storage tank, Hf ... raised position of membrane separation chamber, Hfma
x ... Upper limit position of the membrane separation chamber.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuhito Suzuki             Energy, No. 1, Upper Hand, Inuyama, Aichi Prefecture             Port Co., Ltd. (72) Inventor Seiki Ito             Energy, No. 1, Upper Hand, Inuyama, Aichi Prefecture             Port Co., Ltd. F-term (reference) 4D004 AA03 AC02 CA04 CA13 CA19                       CB05 CB43 CB45 DA01 DA02                       DA11 DA12                 4D006 GA07 KA01 KA44 KA72 KB14                       KB22 KE02Q KE21P MA03                       MC03X PB08 PB15                 4D059 AA07 BA03 BA21 BA34 BE04                       BE42 BK11 CA27 CA29 CB02                       CB25 EA02 EB02

Claims (7)

[Claims] 1. A drainage storage tank for storing treated water containing crushed raw garbage crushed by a crusher; and aerobic treatment of the treated water transferred from the drainage storage tank by a first transfer means. An aerobic treatment tank, a membrane separation chamber that purifies the aerobic treated water that has flowed in from the aerobic treatment tank, a discharge unit that discharges the water purified by the membrane separation chamber, and the membrane separation A sludge collecting part for solid-liquid separating the concentrated treated water transferred from the chamber by the second transfer means, and returning the treated water from which solids have been removed by the sludge collecting part to the drainage storage tank A garbage disposal system comprising: 2. The first transfer means is controlled so that the transfer quantity of the first transfer means per unit time is larger than the inflow quantity of the water to be treated flowing into the waste water storage tank per unit time. The garbage disposal system according to claim 1, further comprising a control means. 3. A first means for detecting the water level in the drainage storage tank
When the water level in the wastewater storage tank, which is provided with a water level sensor, reaches a preset rising position, the control means drives the first transfer means, and also in the wastewater storage tank. When the water level of the water drops to the preset lower position, the control means stops the first transfer means, and the water level in the drainage storage tank also exceeds the raised position and reaches the preset upper limit position. The garbage processing system according to claim 1 or 2, wherein the control means stops the crusher. 4. A second water level sensor for detecting a water level in the membrane separation chamber, wherein when the water level in the membrane separation chamber detected by the second water level sensor reaches a preset rising position, the control means is provided. Also drives the discharging means, and when the water level in the membrane separation chamber also descends to a preset lower position, the control means stops the discharging means, and the water level in the membrane separation chamber also exceeds the rising position. 4. The control unit stops the first transfer unit when a preset upper limit position is reached.
The garbage disposal system according to any one of the above. 5. The food waste treatment system according to claim 4, wherein the control unit further stops the crusher when the water level in the membrane separation chamber reaches the upper limit position. 6. The membrane separation chamber is equipped with a membrane filtration device for filtering the water to be treated aerobically treated by the aerobic treatment tank, and the membrane filtration device is provided with a ceramics filtration membrane. The garbage disposal system according to any one of claims 1 to 5. 7. The sludge collecting section is provided with a filter capable of filtering the water to be treated transferred by the second transfer means and storing a solid content, and the filter is used as the sludge collecting section. Claims 1 to 6 which can be attached to and detached from
The garbage disposal system according to any one of the above.