JP2003275709A - Garbage disposal system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a garbage proposal system whose running cost and odor can be reduced. <P>SOLUTION: This garbage disposal system is provided with a solid-liquid separator 10 for separating solid and liquid mixture including crushed garbage into solid and liquid, a solid disposal device 50 having a heating part (heater 52) and for disposing of the solid part separated by the solid-liquid separator 10, a liquid disposal device having a biological disposal part (solubilization tank 20 and disposal tank 30) and for disposing of the liquid part separated by the solid-liquid separator 10, and a circulation discharge air duct 73 for discharging discharge air heated by the solid disposal device 50 and including moisture to a liquid disposal device (disposal tank 30), condensing and eliminating the moisture included in the discharge air and returning the discharge air to the solid disposal device 50. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a solid-liquid separator for separating a solid-liquid mixture containing crushed garbage from a disposer into a solid content and a liquid content, and a solid-liquid separation apparatus having a heating part. A solid processing apparatus for processing the separated solid content;
The present invention relates to a food waste treatment system including a biological treatment unit and a liquid treatment device that treats the liquid component separated by the solid-liquid separation device.

[0002]

2. Description of the Related Art Heretofore, it has been known to disintegrate a disposer crushed liquid and drainage from a kitchen and discharge it into a sewer or a river.

In order to treat wastewater containing solid matter such as disposer crushed liquid, solid matter and liquid are separated from the disposer wastewater, and the solid matter is dried or decomposed by microorganisms in a solid treatment apparatus, and the liquid is treated in a treatment tank In the case of decomposing treatment with aerobic microorganisms in (aeration tank) etc., the moisture content of solids in the solid state equipment is reduced by discharging the exhaust gas containing steam that is heated by the solid state equipment. It is generally configured to be dried.

[0004]

In this case, a large amount of heat is discharged from the solid processing apparatus to the outside together with exhaust gas.
The heat loss increases, the power consumption of the heating unit increases correspondingly, and the running cost increases. Further, the exhaust gas discharged from the solid processing apparatus contains a large amount of water vapor and also contains organic matter, so that there is a problem that odor is emitted.

Therefore, the present invention has been made to solve such a problem, and an object thereof is to provide a food waste processing system capable of reducing running costs and odors.

[0006]

In order to achieve the above object, the present invention provides a solid-liquid separator for separating a solid-liquid mixture containing crushed food waste into a solid content and a liquid content, and a heating unit. A solid processing device for treating a solid content separated by the solid-liquid separation device, and a liquid treatment device for treating a liquid content separated by the solid-liquid separation device having a biological treatment unit,
A circulation exhaust passage is provided to discharge exhaust gas containing water vapor heated by the solid processing device to the liquid processing device, condense and remove water vapor contained in the exhaust gas, and return to the solid processing device. It is characterized by.

Then, the exhaust gas heated by the solid processing apparatus and containing water vapor is discharged to the upper space in the biological treatment section of the liquid processing apparatus to condense the water vapor contained in the exhaust gas to form dew condensation water. It is characterized in that it is configured to be dropped into the biological treatment section.

Further, the exhaust gas heated by the solid processing apparatus and containing water vapor is discharged to the upper space outside the biological treatment section of the liquid processing apparatus to condense the water vapor contained in the exhaust gas to form dew condensation water. Is configured to flow into the biological treatment section.

Further, the present invention is characterized in that the water vapor contained in the exhaust gas discharged into the upper space is condensed by exchanging heat with the external air sucked from the outside of the apparatus.

On the other hand, a solid-liquid separator for separating a solid-liquid mixture containing crushed food waste into a solid component and a liquid component, and a solid treatment for treating the solid component separated by the solid-liquid separator having a heating part. An apparatus and a liquid processing apparatus having a biological treatment unit for processing a liquid component separated by the solid-liquid separation apparatus, wherein the liquid processing apparatus is heated by the solid processing apparatus and exhausted by containing water vapor. A transfer means for heating the biological treatment part and providing an exhaust flow path for condensing water vapor contained in the exhaust gas to cause dew condensation, and transferring the condensed water condensed in the exhaust flow path to the biological treatment part of the liquid processing apparatus. It is characterized by having.

Further, the solid-liquid mixture containing the crushed food waste flows into the solid-liquid separation device via the relay pump tank, and the condensed water condensed in the exhaust passage is allowed to flow into the relay pump tank. It is characterized by being configured.

Further, the solid processing apparatus is a drying apparatus for heating and drying the solid content separated by the solid-liquid separation apparatus.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall configuration diagram showing a configuration example of a food waste processing system to which the present invention is applied.

In this food waste treatment system, the disposer crushed liquid and kitchen wastewater flowing out from the disposer 2 installed in the sink 1 of the kitchen are purified to a predetermined water quality by the wastewater treatment device 3 and then discharged to the sewer or a combined septic tank. To do.

The wastewater treatment device 3 is considered to be buried underground or installed on the ground. In the underground buried type, it flows into by natural flow using conventional piping, but in the ground installed type,
The relay pump tank 4 may be necessary depending on the position of the kitchen and the piping in each house.

FIG. 2 is a diagram schematically showing each component of the waste water treatment apparatus 3 and the flow of liquid or solid.

The wastewater treatment device 3 of this embodiment is composed of a solid-liquid separation device 10, a solubilization tank 20, a treatment tank 30, and a sedimentation separation tank 4.
0, the solid processing apparatus 50, the air pumps 61 and 62, the transfer pump 63, and the like.

The solid-liquid separation device 10 continuously separates a solid-liquid mixture containing crushed food waste flowing into the disposer 2 or the relay pump tank 4 through an inflow pipe 11 into a solid content and a liquid content and separates them. Liquid content flows into the solubilization tank 20,
The solid content is put into the solid processing apparatus 50. Since this solid-liquid separation device 10 is of a continuous type, the openings of the slits are roughly formed so that overflow does not occur, and the separated liquid component also contains fine solids.

The solubilization tank 20 is provided with a sludge return pipe 41 from the sedimentation separation tank 40 and an air diffusing pipe 21 for cleaning the filter. The air diffusing pipe 21 has an air pump 61 such as a blower.
However, the transfer pumps 63 are connected to the sludge return pipes 41, respectively. In addition, the supernatant liquid is filtered by the filter 2 in the upper part of the tank.
An outflow port 23 is formed so as to flow out to the processing tank 30 via the port 2. In this solubilization tank 10, sludge and fine solid matter settled to the bottom are solubilized by aerobic or anaerobic microorganisms (thermophilic bacteria) that are activated in a state of being heated by heating or the like described later. .

On the other hand, an aeration diffuser 31 for aeration is arranged at the bottom of the treatment tank 30, and an air pump 62 is connected to the treatment tank 30. In addition, an outlet 32 is formed in the upper part of the tank to let the supernatant liquid flow out into the precipitation separation tank 40.
In the treatment tank 30, the aerobic microorganisms inhabiting the carrier (not shown) are activated by the aeration treatment using the air diffuser 31 and the heating described later to decompose organic components in the water to be treated.

A sludge return pipe 41 for returning the settled sludge from the bottom of the tank to the solubilization tank 20 is provided in the sedimentation separation tank 40, and is connected to a transfer pump 63. In addition, a drain port 42 for letting out the supernatant liquid is formed in the upper part of the tank, and a drain pipe to sewer or the like is connected to the drain port 42. In this settling separation tank 40, surplus sludge generated in the processing tank 30 is settled and separated at the bottom of the tank by natural sedimentation.

The solid processing device 50 comprises a drying device for heating and drying the solid content (crushed food waste) fed from the solid-liquid separating device 10 and a composting (composting) device for decomposing and treating with microorganisms. The solid content is reduced in volume or composted.

Although not shown in the drawing, a control unit including a microcomputer for controlling the entire system and an operation display unit for various operations and status display are provided.

In the above structure, the disposer wastewater that has flowed into the solid-liquid separation device 10 is separated into a solid content and a liquid content, and the liquid content flows into the solubilization tank 20. The inflowing liquid component also contains fine solids corresponding to the openings of the solid separation device 10, and the fine solids settle and accumulate at the bottom of the tank. At the time of this liquid inflow, the supernatant liquid flows out into the treatment tank 30 so as to be pushed out through the filter 22, and the treated water in the treatment tank 30 further flows out into the precipitation separation tank 40, and the supernatant from the precipitation separation tank 40. Liquid is discharged to sewers.

As described above, the treatment tank 30 utilizes water treatment by decomposing organic matter by activated aerobic microorganisms by aeration by the air pump 62 and heating described later. Excess sludge contained in water flows out to the sedimentation separation tank 40 and is sedimented.

The sludge settled and accumulated in the sedimentation separation tank 40 is periodically returned to the solubilization tank 20 by the transfer pump 63.
In the solubilization tank 20, sludge and fine solid matter are solubilized by activated thermophiles by air supply by aeration and heating described later, and the dissolved organic matter is efficiently decomposed in the treatment tank 30. As a result, the frequency of sludge collection on a regular basis can be reduced.

Further, the solid content (crushed food waste) separated by the solid-liquid separation device 10 is put into a solid processing device 50 including a drying device and a composting device to be subjected to volume reduction and composting treatment.

FIG. 3 is a configuration diagram showing a more specific embodiment of the waste water treatment apparatus 3, and the same reference numerals as those in FIG. 2 indicate the same or corresponding portions. Note that the filter 22 and the like of the solubilization tank 20 shown in FIG. 2 are omitted in order to make the main parts easy to understand.

The solid-liquid separation device 10 into which the crushed food waste liquid or kitchen waste water flows has a slit 12 having a mesh size of several mm, and when the crushed liquid flows into the slit 12, the slit 1
A solid substance (crushed food waste) is accumulated on the upper surface of the container 2, and the liquid passes through the slit 12 and flows into the solubilization tank 20. At this time,
Fine solids or fibrous substances smaller than the openings of the slits 12 also flow out to the solubilization tank 20 together with the liquid.

The solid matter accumulated on the slit 12 is periodically charged into the solid processing apparatus 50 by the rotating plate 13.
When the rotary plate 13 rotates, the solid processing device 50 is interlocked with the rotary plate 13.
The input lid 51 of is opened. Solid processing device 5
In the normal operation of 0, the closing lid 51 is in the closed state.

The solid processing apparatus 50 is a drying apparatus, which has a heater 52, an agitator 53, a fan 54, etc. inside and has a function of drying the charged solid material for volume reduction. In order to dry, the exhaust containing the vapor evaporated in the solid processing apparatus 50 is sucked by the fan 54 and discharged from the exhaust port 55. The exhaust port 55 is provided with an exhaust flow path 71 for discharging the exhaust gas containing a large amount of steam to the upper space in the processing tank 30, and is condensed in the upper space of the processing tank 30. An exhaust gas recirculation path 72 is provided for recirculating the exhaust gas with reduced humidity to the intake port 56 of the solid processing apparatus 50, and a circulation exhaust flow path 73 is formed by these. Condensation water condensed on the upper space in the processing tank 30 and generated on the wall surface of the top surface 33 or the like drops into the processing tank 30 as water droplets on the inclined surface or the like formed on the top surface 33.

The upper space in the treatment tank 30 is not sealed because it has the outlet 23 of the solubilization tank 20 and the outlet 32 to the precipitation / separation tank 40. Since 51 is closed and the inside of the solid processing apparatus 50 has a negative pressure, exhaust gas with reduced humidity can be sucked from the upper space in the processing tank 30 from the intake port 56 through the exhaust gas recirculation path 72.

In the above description, the exhaust gas discharged from the solid processing apparatus 50 is circulated through the upper space in the processing tank 30, but the same applies when the upper space in the solubilization tank 20 is used. .

With such a configuration, the exhaust gas discharged from the solid processing apparatus 50 is circulated between the processing tank 30 and the upper space in the solubilization tank 20, and a large amount is contained in the heated exhaust gas. By condensing the water vapor in the upper space in the treatment tank 30 or the solubilization tank 20 and reusing the exhaust gas with reduced humidity, it is possible to recover a part of the heat discharged from the solid processing apparatus 50. Becomes There is also an effect that the treatment tank 30 and the solubilization tank 20 can be heated by the heat generated at the time of aggregation. As a result, the running cost of the entire system can be reduced.

Further, since the dew condensation water of the exhaust containing the water vapor evaporated in the solid processing apparatus 50 contains organic matter,
Organic matter can be decomposed in the treatment tank 30 and drained. Further, since the odorous component discharged together with the exhaust gas is also dissolved in the dew condensation water and treated in the treatment tank 30, the odor can be reduced. Further, it is possible to prevent the odor and the like from being discharged to the outside together with the exhaust of the high temperature.

Further, since the solid processing apparatus 50 is a drying apparatus for heating and drying the solid content separated by the solid-liquid separation apparatus 10, the heating temperature is high and the exhaust gas contains a large amount of water vapor. It is effective.

Generally, this type of solid processing apparatus 50 is used.
Is equipped with a heated catalytic deodorizer with high deodorizing effect,
Since the odor can be reduced as described above,
Since the heating catalyst deodorizing device is unnecessary and the operation can be performed while reducing the operation frequency and the deodorizing ability, it is possible to reduce the device cost and the running cost.

FIG. 4 is a constitutional view showing another embodiment, and the same reference numerals as those in the above embodiment indicate the same or corresponding portions.

In the present embodiment, the water vapor contained in the exhaust gas discharged from the solid processing apparatus 50 to the upper space of the processing tank 30 is connected to the suction side of the air pump 62, and the intake port 3a is opened to the outside of the apparatus housing. The cold air sucked from the outside of the apparatus is exchanged with heat through the wall surface 34 to cause dew condensation, and the condensed air is dropped into the processing tank 30. Also in this case, the same is true even if the solubilization tank 20 is used.

With the above-mentioned structure, more water vapor can be condensed efficiently, so that the function and effect of the above embodiment are increased.

FIG. 5 is a constitutional view showing still another embodiment, and the same reference numerals as those in the above embodiment indicate the same or corresponding portions.

In this embodiment, the solid processing apparatus 50 is used.
The exhaust gas discharged from the exhaust passage 71 through the solubilization tank 2
0 and the space 7 formed on the top plates 24 and 34 of the processing tank 30
It is configured to be discharged to No. 4. Further, the top plates 24 and 34 of the solubilization tank 20 and the treatment tank 30 are inclined downwardly toward the opening 25 formed in the top plate 24 of the solubilization tank 20, and the water droplets condensed on the wall surface It is configured to drop into the solubilization tank 20 through the opening 25. Water drops that have fallen into the solubilization tank 20 flow into the treatment tank 30,
Since the treatment is performed, the same is true even if the opening is formed on the treatment tank 30 side.

With this structure, the temperature of the top surface of the space 74 separated by the top plates 24, 34 is lower than that in the solubilization tank 20 or the processing tank 30 due to the influence of outside air. Since more water vapor can be efficiently condensed than in the embodiment shown in FIG. 3, the action and effect are increased.

FIG. 6 is a constitutional view showing still another embodiment, and the same reference numerals as those in the above-mentioned embodiment indicate the same or corresponding portions.

In this embodiment, the solid processing apparatus 50 is used.
Of the solubilization tank 20 by the exhaust gas discharged from the exhaust port 55
An exhaust flow path 71 for heating the processing tank 30 and the like is provided, the bottom surface of the exhaust flow path 71 is inclined, and the condensed water condensed on the wall surface of the exhaust flow path 71 is piped as shown in FIG. It is configured to be poured into the relay pump tank 4.
The condensed water that has flowed into the relay pump tank 4 is the disposer 2
It is sent to the inflow pipe 11 to the solid-liquid separation device 10 by the pressure feed pump 4P together with the drainage from.

With the above-described structure, the structure of the exhaust passage 71 is simplified, and the relay pump tank 4 is effectively used to remove the condensed water from the solid-liquid separation device 10 and the solubilization tank 20.
Can be processed by flowing into the processing tank 30 via

FIG. 7 is a constitutional view showing still another embodiment, and the same reference numerals as those in the above-mentioned embodiment indicate the same or corresponding portions.

In the above-described embodiment, the relay pump tank 4 is used, but in this embodiment, the waste water from the disposer 2 shown in FIG. 1 directly flows into the solid-liquid separation device 10, and the relay pump tank 4 is not used. In the case of being applied to the system, the condensed water w accumulated in the exhaust passage 71 similar to that in the above embodiment is transferred to the processing tank 30 by the transfer pump 64.

With this structure, the structure of the exhaust passage 71 is simplified, and even in a system that does not use the relay pump tank, the condensed water can be made to flow into the processing tank 30 for processing. It should be noted that the same is true even if it is transferred to the solubilization tank 20.

[0051]

As described above, according to the present invention, a solid-liquid separation device for separating a solid-liquid mixture containing crushed food waste into a solid content and a liquid content, and a heating section are provided in the solid-liquid separation apparatus. A solid processing apparatus for processing the separated solid content, and a liquid processing apparatus having a biological processing section for processing the liquid content separated by the solid-liquid separation apparatus, and heated by the solid processing apparatus to generate steam The exhaust gas containing the exhaust gas is discharged to the liquid processing equipment, the water vapor contained in the exhaust gas is condensed and removed, and the circulation exhaust flow path is returned to the solid processing equipment. The odor generated can be reduced.

Then, the exhaust gas heated by the solid processing apparatus and containing water vapor is discharged to the upper space in the biological treatment section of the liquid processing apparatus to condense the water vapor contained in the exhaust gas to form dew condensation water. Since the dew condensation water contains organic substances, it is configured to drop into the treatment section.
It becomes possible to treat organic matter in the biological treatment section and discharge it. Further, since the odorous component discharged together with the exhaust gas is also dissolved in the dew condensation water and treated in the biological treatment section, the odor can be reduced.

Also, the exhaust gas heated by the solid processing apparatus and containing water vapor is discharged to the upper space outside the biological treatment section of the liquid processing apparatus to condense the water vapor contained in the exhaust gas to form dew condensation water. Since the water vapor is allowed to flow into the biological treatment section, more water vapor than the above can be efficiently condensed, so that the above-described effect is increased.

Further, the water vapor contained in the exhaust gas discharged to the upper space is condensed by exchanging heat with the outside air sucked from the outside of the apparatus, so that more water vapor can be condensed efficiently. Therefore, the effects described above are further enhanced.

On the other hand, a solid-liquid separator for separating a solid-liquid mixture containing crushed food waste into a solid content and a liquid content, and a solid treatment for treating the solid content separated by the solid-liquid separation apparatus having a heating part. An apparatus and a liquid treatment apparatus having a biological treatment unit for treating the liquid component separated by the solid-liquid separation apparatus, and the living thing of the liquid treatment apparatus by exhaust gas heated by the solid treatment apparatus and containing water vapor. An exhaust passage is provided for heating the treatment portion to condense the water vapor contained in the exhaust gas to cause dew condensation, and is provided with a transfer means for transferring the dew condensation water condensed in the exhaust passage to the biological treatment portion of the liquid processing apparatus. This simplifies the structure of the exhaust passage and allows the condensed water to flow into the biological treatment unit for treatment.

Further, the solid-liquid mixture containing the crushed food waste flows into the solid-liquid separator through the relay pump tank,
By making the condensed water condensed in the exhaust flow channel flow into the relay pump tank, the structure of the exhaust flow channel is simplified, and the condensed water is effectively used in the solid-liquid separation device. The liquid can be processed by flowing into the biological treatment section of the liquid treatment apparatus via.

If the solid processing apparatus is a drying apparatus for heating and drying the solid content separated by the solid-liquid separation apparatus, the heating temperature is high and the exhaust gas contains a large amount of water vapor, which is more effective. Is.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a configuration example of a food waste processing system to which the present invention is applied.

FIG. 2 is a diagram schematically showing each component of the wastewater treatment device and the flow of liquid or solid in the food waste treatment system.

FIG. 3 is a configuration diagram showing a more specific embodiment of the wastewater treatment device.

FIG. 4 is a configuration diagram showing another embodiment of the present invention.

FIG. 5 is a configuration diagram showing still another embodiment.

FIG. 6 is a configuration diagram showing still another embodiment.

FIG. 7 is a configuration diagram showing still another embodiment.

[Explanation of symbols]

1 sink sink 2 Disposer 3 Wastewater treatment equipment 4 relay pump tank 4P pressure pump 10 Solid-liquid separation device 12 slits 13 rotating plate 20 Solubilization tank 21 Air diffuser 22 filters 30 treatment tanks 31 Air diffuser 40 sedimentation tank 41 Sludge return pipe 50 Solid Processing Equipment 52 heater 53 Stirrer 54 fans 55 Exhaust port 56 Inlet 61,62 Air pump 63,64 Transfer pump 71 Exhaust flow path 72 Exhaust gas recirculation path 73 Circulation exhaust passage

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Keiichi Fujimoto             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Isao Yoneda             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Kozo Akamatsu             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Hiroyuki Takami             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F term (reference) 3L113 AA06 AB05 AC08 AC87 BA01                       DA06                 4D004 AA03 AB01 BA04 CA04 CA13                       CA19 CA22 CA42 CA48 CB28                       CB32                 4D059 AA05 AA07 BA01 BA11 BA56                       BD11 BE02 BE13 BK01 BK12                       CA04 CA22 CB01 CB27 CC01

Claims (7)

[Claims] 1. A solid-liquid separator for separating a solid-liquid mixture containing crushed food waste into a solid content and a liquid content, and a solid treatment for treating the solid content separated by the solid-liquid separation apparatus having a heating unit. An apparatus and a liquid treatment apparatus having a biological treatment unit for treating a liquid component separated by the solid-liquid separation apparatus, wherein exhaust gas containing steam and heated by the solid treatment apparatus is supplied to the liquid treatment apparatus. A food waste processing system comprising a circulation exhaust flow path for discharging and condensing and removing water vapor contained in exhaust gas and returning to the solid processing apparatus. 2. The exhaust gas heated by the solid processing apparatus and containing water vapor is discharged to the upper space in the biological treatment section of the liquid processing apparatus to condense the water vapor contained in the exhaust gas to form dew condensation water. The food waste treatment system according to claim 1, wherein the food waste treatment system is configured to be dropped into the biological treatment section. 3. The exhaust gas heated by the solid processing apparatus and containing water vapor is discharged to an upper space outside the biological treatment section of the liquid processing apparatus to condense the water vapor contained in the exhaust gas to form dew condensation water. The food waste processing system according to claim 1, wherein the food waste is introduced into the biological treatment section. 4. The water vapor contained in the exhaust gas discharged to the upper space is condensed by exchanging heat with the external air sucked from outside the apparatus. Garbage processing system. 5. A solid-liquid separator for separating a solid-liquid mixture containing crushed food waste into a solid content and a liquid content, and a solid treatment for treating the solid content separated by the solid-liquid separation apparatus having a heating part. An apparatus and a liquid treatment apparatus having a biological treatment unit for treating a liquid component separated by the solid-liquid separation apparatus, wherein the liquid treatment apparatus is heated by the solid treatment apparatus and exhausted by containing water vapor. A transfer means for heating the biological treatment part and providing an exhaust flow path for condensing water vapor contained in the exhaust gas to cause dew condensation, and transferring the condensed water condensed in the exhaust flow path to the biological treatment part of the liquid processing apparatus. A food waste processing system characterized by having. 6. The solid-liquid mixture containing the crushed food waste flows into the solid-liquid separator through a relay pump tank,
The food waste processing system according to claim 5, wherein the dew condensation water condensed in the exhaust passage is made to flow into the relay pump tank. 7. The garbage treatment device according to claim 1, wherein the solid treatment device is a drying device for heating and drying the solid content separated by the solid-liquid separation device. system.