JP2001225046A - Garbage disposal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such nonconformity that in an air lift device used for conveyance of waste water from a sedimentation separation tank in a conventional garbage disposal device to a waste water treating device, air discharged through an air feeding port is back-flowed from a suction port in the lower end of an air lift pipe and pumping of waste water is not enabled efficiently. SOLUTION: The garbage disposal device is equipped with a flow rate regulation tank for temporarily storing crushed garbage liquid obtained by crushing garbage discharged from a kitchen together with water, with a solid-liquid separator for separating the crushed garbage liquid supplied from the flow rate regulation tank into a solid matter and a liquid matter, with a composting device for composting the solid matter separated by the solid-liquid separator, with a sedimentation separation tank for precipitating floating substance contained in the liquid matter supplied from the solid-liquid separator, with an air lift device for pumping up and carrying the liquid matter from the sedimentation separation tank and a waste water treatment device for obtaining treated water by applying biological treatment to the liquid matter supplied from the air lift device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for introducing garbage crushed with water using a disposer, separating the garbage into solids and liquids, and decomposing organic substances contained in each of the garbage by microorganisms. The present invention relates to a garbage processing apparatus for obtaining a water quality capable of discharging solid components to compost and liquid components to a sewer.

[0002]

2. Description of the Related Art In recent years, methods for treating organic wastewater using aerobic microorganisms have been actively researched and developed. For example, in a sewage treatment plant or the like, an activated sludge method is usually adopted, and in a combined type septic tank, an activated sludge method or a submerged filter method is adopted.

As for garbage discharged from homes and the like, research and development has been conducted to treat garbage crushed by a disposer as garbage-containing wastewater.

For example, Japanese Patent Application Laid-Open No. 9-1117 discloses that
The garbage-containing wastewater flows into the solids treatment section, where the solids are decomposed by microorganisms, and then the primary treated water discharged from the solids treatment device is introduced into the wastewater treatment tank where it is aerated. Discloses decomposing and removing solids from garbage-containing wastewater pulverized by a disposer and purifying the wastewater.

[0005] In the apparatus disclosed in this publication, wastewater is aerated by a diffuser in a wastewater treatment tank.
Basically, the same treatment as the activated sludge method is performed.

[0006] On the other hand, the present inventors have used a wastewater treatment device (secondary treatment device) provided with a packed bed in which a microorganism carrier is filled at the subsequent stage of a solid matter treatment device (primary treatment device). It has been found that the purification of wastewater can be carried out well (Japanese Patent Laid-Open No. 11-19674).

[0007] In a conventional water treatment apparatus such as a septic tank, an air lift apparatus is frequently used as a means for transporting waste water. In this air lift device, a suction port at a lower end of an air lift pipe vertically erected is opposed to a bottom surface of a water tank at a predetermined interval, and in many cases, it is disclosed in JP-A-8-49699 or JP-A-10-15570. The air supply port at the end of the air supply pipe that sends air is connected vertically to the side of the air lift pipe at a position above the suction port, and discharges air into the lower end of the air lift pipe through the air supply port By doing so, the liquid in the water tank is sucked upward and transported.

[0008]

Here, in an air lift device used for conveying wastewater from a sedimentation separation tank to a wastewater treatment device in a conventional garbage disposal device, air discharged through an air supply port is airlift pipe. The water flowed backward from the suction port at the lower end, and the drainage could not be pumped efficiently.
Furthermore, the sludge that has settled at the bottom of the sedimentation and separation tank is rolled up by the turbulent flow of water due to the backflow of air, and is directly conveyed to the wastewater treatment device together with the wastewater, where the sludge accumulates in the wastewater treatment device and is clogged. As a result, there is a problem that the processing efficiency is reduced.

[0009] The present invention has been made in view of the above-mentioned problems, and a high-efficiency treatment of wastewater can be performed for a long time by efficiently transferring only wastewater to a wastewater treatment device without rolling up settling sludge in a sedimentation separation tank. It is an object of the present invention to provide a garbage disposal device that can be continued for a long time.

[0010]

According to a first aspect of the present invention, there is provided a garbage disposal apparatus comprising: a flow rate adjusting tank for temporarily storing a garbage crushed liquid obtained by crushing garbage discharged from a kitchen together with water;
A solid-liquid separation device for separating the crushed liquid into a solid component and a liquid component supplied from the flow rate adjusting tank, and a compost device for composting the solid component separated by the solid-liquid separation device. A sedimentation separation tank for sedimenting suspended solids in a liquid component supplied from the solid-liquid separation device, an air lift device for pumping and transporting the liquid component from the sedimentation separation tank, A wastewater treatment device for subjecting the liquid component to biological treatment to obtain treated water.

According to a second aspect of the present invention, in the garbage processing apparatus according to the first aspect, the composting device is filled with a microorganism carrier, and the solids are composted by microorganisms. .

According to a third aspect of the present invention, in the garbage disposal apparatus according to the first aspect, the wastewater treatment apparatus is filled with a microorganism carrier, and the organic component in the liquid is biologically treated and oxidized. It is characterized by decomposing.

According to a fourth aspect of the present invention, in the apparatus according to any one of the first to third aspects, the microorganism carrier is
It is a wood chip.

According to a fifth aspect of the present invention, in the apparatus according to any one of the first to fourth aspects, the liquid in the sedimentation / separation tank uses an air lift device installed above the sedimentation / separation tank. And transported to the wastewater treatment device.

According to a sixth aspect of the present invention, in the apparatus according to any one of the first to fifth aspects, the air lift device is provided such that an upper liquid surface of the liquid in the sedimentation separation tank communicates with the air lift device. Characterized by having a small chamber.

According to a seventh aspect of the present invention, in the apparatus according to any one of the first to sixth aspects, the air lift device vertically stands an air lift pipe for transporting the liquid, and The suction port at the lower end of the pipe faces the bottom surface of the small chamber at a predetermined interval, and the air supply port at the tip of the air supply pipe that sends air is connected to the pipe side of the air lift pipe above the suction port from diagonally below. It is characterized by the following.

According to an eighth aspect of the present invention, in the device according to the seventh aspect, the air supply pipe has an angle range of 30 ° or more and 60 ° or less downward with respect to a perpendicular to a vertical axis of the air lift pipe. It is characterized by being attached.

[0018]

An embodiment according to the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a garbage processing system 1 according to the present embodiment.

In FIG. 1, a garbage disposal system 1 comprises:
The garbage discarded in the sink is crushed by a disposer together with water, and the garbage crushed liquid and kitchen wastewater are introduced and temporarily stored therein, and a mixture of the crushed garbage and wastewater is temporarily stored. Solid-liquid separator 3 for separating the liquid into solid and liquid components, sedimentation separation tank 4 for precipitating fine particles in the liquid component, air lift device 5 for pumping and transporting the supernatant liquid from sedimentation separation tank 4, A wastewater treatment device 6 for biologically removing the organic matter and a solid material treatment device (composting device) 7 for composting solids.

The crushed garbage-containing wastewater temporarily stored in the flow control tank 2 is pumped to the solid-liquid separation device 3 at regular time intervals. The time interval of this pumping is determined by the processing capacity of the waste water treatment device 6 at the subsequent stage.

In the solid-liquid separation device 3, the crushed garbage-containing wastewater pumped up is separated into solids such as crushed garbage and sludge and liquids of organic wastewater. The separated solids are sent to the composting device 7 and composted. On the other hand, the liquid component is introduced into the precipitation separation tank 4.

The organic wastewater introduced into the sedimentation / separation tank 4 is allowed to stand to precipitate fine particles suspended in the wastewater, and only the supernatant liquid is transferred to the wastewater treatment device 6 by the air lift device 5 to treat the microorganisms. , And then drained as sewage.

Here, the purpose of transporting only the supernatant liquid from the sedimentation / separation tank 4 is to prevent the wastewater treatment device 6 from being clogged by fine particles in the liquid, and disturb the liquid in the sedimentation / separation tank 4. The structure of the air lift device 5 that conveys only the supernatant liquid without any difficulty is very important. Thus, the configuration of the air lift device 5 will be described in detail with reference to FIG.

In FIG. 2, the air lift device 5 is installed above the sedimentation / separation tank 4 and is provided with a small chamber 51 provided so as to communicate the upper liquid level of the liquid portion 41 stored and stored in the sedimentation / separation tank 4. An air lift pipe 52 vertically provided in a small chamber 51 for transporting a liquid component, an air supply pipe 53 for sending air to the air lift pipe 52, and an air pump 54 connected to the air supply pipe 53; It is composed of

The communication part of the small chamber 51 is set so as to be 1 to 10 mm below the liquid level of the liquid part 41 in the sedimentation / separation tank 4, and when the liquid inside the small chamber 51 is pumped up, the liquid part passes through the communication part. 41 is configured to overflow and flow into the small chamber 51. At this time, since the liquid component 41 is left still, the suspended particulates settle down to form a sedimentary layer 42, and the liquid flowing into the small chamber 51 by overflowing is the supernatant liquid of the liquid component 41.

Next, the air lift pipe 52 erected in the small chamber 51 is provided with a suction port at the lower end of the pipe at an interval of 5 to 10 mm from the bottom of the small chamber 51. If you reduce the space here, the resistance to sucking liquid will increase,
You will not be able to pump efficiently.

The air supply port at the end of the air supply pipe 53 for sending air from the air pump 54 is connected to the pipe side above the suction port of the air lift pipe 52 from obliquely below. This makes it possible to efficiently pump the liquid by directing the air flow inside the air lift pipe 52 upward.

Further, an air lift pipe 5 is provided in the small chamber 51.
2 is installed, the air sent from the air supply pipe 53 to the inside of the air lift pipe 52 through the air supply port is blocked by the bottom surface of the small chamber 51 even if it flows backward from the suction port, and settles at the bottom of the sedimentation separation tank 4. The liquid portion 41 inside the sedimentation separation tank 4 is kept stationary without disturbing the precipitated layer 42 of the fine particles.

Here, in order to compare the efficiency of pumping by the air lift device, FIG. 3 is a schematic diagram of an experimental example of an air lift device in which the way of attaching the air supply pipe 53 to the air lift pipe 52 is variously changed.

In the experiment, five types of air lift devices were used. All air lift pipes were made of vinyl chloride pipe having an inner diameter of 13 mm, the height from the air inlet to the water surface was 6 cm, and the pumping height from the air inlet was 18 cm.
(a) is used in the present embodiment, and an air supply port is provided diagonally from below, and the inside diameter of the air supply port is 13 mm. (B) is (a)
However, the inner diameter of the air supply port was reduced to 7 mm.
In (c), an air supply port having an inner diameter of 13 mm was installed perpendicular to the air lift pipe. This shape is a general shape frequently used in a normal air lift device. (D) is inner diameter 13
The air supply port of mm was installed immediately below the air lift pipe suction port. In (e), the inside diameter of the air supply port in (d) was reduced to 7 mm.

The experimental conditions were as follows: 3 L of air was sent from the air pump per minute, and the time required to pump up 1 L of water was measured. FIG. 4 shows the result of ten measurements for one device and comparison of the average values. From this result, it was found that the shape in which the air supply port having the same inner diameter as the inner diameter of the air lift pipe was attached diagonally from below to pump water efficiently.

FIG. 5 is a view showing the angle of attachment of the air supply pipe 53 to the air lift pipe 52. FIG.
In FIG. 5A, the air supply pipe 53 is attached at an angle of 30 ° below the perpendicular of the vertical axis of the air lift pipe 52, and in FIG. It is mounted at an angle of 60 ° below the perpendicular to the direction axis. By setting the air supply pipe 52 in these angle ranges, that is, in the range of 30 ° or more and 60 ° or less, it is possible to achieve the objects and effects of the present invention.

Although the air supply pipe 53 is bent at an acute angle before reaching the air lift pipe 52, the air supply pipe 53 may be linearly attached to the air lift pipe 52 from below without bending. It is possible to achieve the purpose and effect.

[0035]

As is apparent from the above description, according to the present invention, a small chamber is provided above the sedimentation / separation tank so that the liquid level communicates with the chamber, and an air lift pipe is erected inside the chamber, thereby obliquely from below. By sending air, only the liquid supernatant liquid can be efficiently conveyed to the wastewater treatment device without causing turbulence in the sedimentation separation tank. There is an effect that efficient processing can be performed for a long period of time.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a garbage processing apparatus according to an embodiment of the present invention as viewed from the front.

FIG. 2 is a schematic diagram of an air lift device installed above a sedimentation separation tank as viewed from the front.

FIG. 3 is a schematic diagram of five types of air lift devices used in an experiment comparing pumping efficiencies by air lift.

FIG. 4 is a table comparing the time required for pumping 1 L of water by five types of air lift devices.

FIG. 5 is a diagram schematically showing an attachment angle of an air supply pipe to an air lift pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Garbage disposal apparatus 2 ... Flow control tank 3 ... Solid-liquid separation apparatus 4 ... Sedimentation separation tank 5 ... Air lift apparatus 6 ... Wastewater treatment apparatus 7 ... Composting apparatus 41 ... Liquid content inside a sedimentation separation tank 42 ... Bottom part of a sedimentation separation tank Sedimentary layer of fine particles settled on the surface 51 ... small chamber 52 ... air lift pipe 53 ... air supply pipe 54 ... air pump

Claims (8)

[Claims] 1. A flow control tank for temporarily storing a garbage crushed liquid obtained by crushing garbage discharged from a kitchen together with water, and a solid content and a liquid content of the crushed liquid supplied from the flow control tank. A solid-liquid separator for separating the solid component into a compost from the solid component separated by the solid-liquid separator; and a sedimentation of suspended solids in the liquid component supplied from the solid-liquid separator. A sedimentation / separation tank for pumping the liquid component from the sedimentation / separation tank, and an airlift device for pumping the liquid component from the sedimentation / separation tank; and a wastewater for subjecting the liquid component supplied from the airlift device to biological treatment to obtain treated water. A garbage disposal apparatus, comprising: 2. The garbage disposal apparatus according to claim 1, wherein the composting apparatus is filled with a microorganism carrier, and the solids are composted by microorganisms. 3. The garbage disposal apparatus according to claim 1, wherein the wastewater treatment apparatus is filled with a microorganism carrier, and the organic component in the liquid component is biologically treated and oxidatively decomposed. 4. An apparatus according to claim 1, wherein said microorganism carrier is a wood chip. 5. The apparatus according to claim 1, wherein the liquid in the sedimentation / separation tank is drained using an air lift device installed above the sedimentation / separation tank. A garbage disposal device that is transported to 6. The apparatus according to claim 1, wherein the air lift device includes a small chamber provided so that an upper liquid surface of the liquid in the sedimentation separation tank communicates with the air lift device. A garbage disposal device characterized by the following. 7. The air lift device according to claim 1, wherein the air lift device has an air lift pipe for vertically transporting the liquid, and a suction port at a lower end of the air lift pipe. At a predetermined interval from the bottom surface of the small chamber, and the air supply port at the tip of the air supply pipe for sending air is connected to the pipe side above the suction port of the air lift pipe from diagonally below. Waste treatment equipment. 8. The air supply pipe is at least 30 ° below a vertical line of a vertical axis of the air lift pipe.
Characterized by being mounted in an angle range of less than °
The garbage disposal device according to claim 7.