JPH078978A - Waste water treatment apparatus - Google Patents

Abstract

PURPOSE:To sufficiently perform the reduction of BOD of waste water and the removal of SS thereof by preventing the passing speed of waste water through fine wooden pieces from becoming high. CONSTITUTION:Waste water is supplied into a treatment tank 2 from a drain pipe 1 to be subjected to decomposition treatment in the treatment tank. In this waste water treatment apparatus, a plurality of partition plates 11 are formed in the treatment tank 2 and passages 5 permitting waste water to pass are formed to the partition plates 11 so as not to be arranged on a vertical straight line. Waste water moves through the treatment tank 2 along the partition plates 11 and passes through the passages 5 to move to the partition plates 11 of lower stages and, therefore, the waste water passes through the treatment tank 2 in a meandering state and the passing distance of waste water in the treatment tank 2 and the treatment time of the waste water can be extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste water treatment device for treating waste water discharged from a kitchen sink or the like.

[0002]

2. Description of the Related Art Conventionally, it has been practiced to decompose sludge containing organic substances and water by using microorganisms and dispose of the sludge to the extent that it does not affect the environment, and as an example, Japanese Patent Publication No. 2-34679. The publication proposes a method of treating sludge with microorganisms using wood chips. According to the sludge treatment method described in this publication, wood particles that serve as a microbial culture substrate are filled as a treatment medium layer in a treatment tank, and water-containing sludge is caused to flow down into the treatment medium layer to generate in the treatment medium layer. The digested and decomposed fat, protein, cellulose, etc. in the sludge by the propagated microorganisms, and the sludge after treatment is discarded. And recently, a wastewater treatment device applying this sludge treatment technology has been devised. Figure 6
The wastewater treatment device shown in (a) and (b) has a drainage port 3 in which a large number of through holes 20 formed of a metal mesh or the like are formed on the lower surface of a treatment tank 2 having an octagonal cross section and supported by legs 26. It is provided and formed, and the processing tank 2 is filled with wood chips, and the waste water generated in the kitchen is poured into the processing tank 2 filled with the wood particles, and the waste water is passed through the wood particles. Biochemical oxygen consumption (hereinafter abbreviated as BOD) is reduced and suspended substances (hereinafter S
(Abbreviated as S) is removed to treat the wastewater, and the treated wastewater is discharged from the through hole 20 of the drainage port 3.

[0003]

However, when a large amount of wastewater is supplied to the wastewater treatment equipment of the above-mentioned conventional example, the passage speed of the wastewater passing through the wood strip becomes faster, and the wastewater is discharged without being sufficiently treated. There was a fear that The present invention has been made in view of the above points, and it is possible to prevent the passage speed of the wastewater passing through the wood strips from increasing, and it is possible to sufficiently reduce the BOD of the wastewater and remove the SS. It is intended to provide a wastewater treatment device.

[0004]

A wastewater treatment apparatus A according to the present invention is a wastewater treatment apparatus which supplies wastewater from a drain pipe 1 into a treatment tank 2 and decomposes the wastewater in the treatment tank 2. A plurality of partition plates 11 are provided inside 2 and a passage 5 through which the drainage passes is formed in each partition plate 11 so as not to be lined up and down on a straight line.

Further, the wastewater treatment equipment A according to the present invention is a wastewater treatment equipment for supplying wastewater from the drainage pipe 1 into the treatment tank 2 and decomposing the wastewater in the treatment tank 2. The rotating shaft 6 in the direction is arranged and a plurality of stirring blades 7 are inclined and provided on the rotating shaft 6. Furthermore, the wastewater treatment equipment A according to the present invention is a wastewater treatment equipment that supplies wastewater from the drainage pipe 1 into the treatment tank 2 and decomposes the wastewater in the treatment tank 2. It is characterized in that the division plates 8 are provided and the communication holes 9 through which the drainage passes are formed in each division plate 8.

[0006]

Since a plurality of partition plates 11 are provided inside the processing tank 2 and the passages 5 through which the waste water passes are formed so that the partition plates 11 do not line up in a straight line, the waste water is discharged from the partition plates 11.
As it moves in the treatment tank 2 along with passing through the passage 5 and moves to the partition plate 11 in the next stage, the wastewater meanders and passes in the treatment tank 2. Tank 2
As the distance of passing through the inside of the wastewater becomes longer, the treatment time of the wastewater can be lengthened.

Further, a vertically long rotating shaft 6 is provided inside the processing tank 2.
Since a plurality of stirring blades 7 are tilted and provided on the rotating shaft 6 by rotating the stirring blade 7 provided on the rotating shaft 6, the waste water can be diffused into the treatment tank 2 and the stirring blades can also be diffused. Since the wastewater spirally passes along 7, the distance through which the wastewater passes through the inside of the wastewater treatment tank 2 becomes long, and the wastewater treatment time can be lengthened.

Further, since the dividing plate 8 is provided inside the treatment tank 2 and the communication hole 9 through which the waste water passes is formed in the dividing plate 8, the division plate 8 becomes a resistance and the waste water does not easily flow. It is possible to lengthen the time for passing through the inside of 2.

[0009]

EXAMPLES The present invention will be described in detail below with reference to examples. Figure 1
1 shows an example of the waste water treatment apparatus A, 1 is a drain pipe having a discharge port 10 opened downward, 2 is a treatment tank, and a treatment tank is provided below the discharge port 10 of the drain pipe 1. 2 are provided. The processing tank 2 is a cylinder whose upper surface is open, and a plurality of partition plates 11 are provided inside the processing tank 2.
The partition plate 11 is attached to one inner wall of the processing tank 2 with its tip 11a tilted downward, and a gap is provided between the tip 11a of the partition plate 11 and the other inner wall facing the inner wall. Is formed, and this gap is formed as the passage 5. Further, the partition plates 11 are alternately attached to the inner walls facing each other, and accordingly, the passages 5 are also formed left and right alternately. A drainage port 3 is provided between the tip 11a of the lowermost partition plate 11 and the inner wall, and the drainage port 3 is formed of a mesh-shaped metal plate or the like having a large number of through holes. Then, each of the small tanks 4 formed in the processing tank 2 by the partition plate 11 and the passage 5 are filled with wood chips.

The wastewater treatment equipment A thus formed is
The wastewater is supplied from the discharge port 10 of the drainage pipe 1 into the treatment tank 2, and the wastewater is passed through the wood strip filled in the uppermost small tank 4,
After that, it passes through the passage 5 and passes through the wood chips filled in the small tank 4 formed therebelow. In this way, the wastewater 4 passes through the lower tank 4 in sequence and is generated in the wood chips.
The propagated microorganisms decompose organic matter contained in the wastewater and discharge the treated wastewater from the drainage port 3 to sewers or the like.

As described above, in this embodiment, since the plurality of partition plates 11 are provided inside the processing tank 2 and the passages 5 are alternately provided so as not to be aligned in a straight line, the partition plate 11 for drainage is used. Along the passage along the passage 5
Since it passes through the partition plate 11 to the next stage, the wastewater meanders through the treatment tank 2 as shown by the arrow in FIG. 1, and passes through the wastewater treatment tank 2 inside. The distance to be treated becomes longer and the treatment time of wastewater can be prolonged.

FIG. 2 shows another embodiment. Inside the treatment tank 2 of this wastewater treatment equipment A, a spiral spiral plate 13 is provided as a partition plate 11. That is, the processing tank 2 disposed below the discharge port 10 of the drain pipe 1 is a cylindrical body having an open top surface, and a spiral spiral plate 13 having a long vertical shape is provided inside the processing tank 2. , Spiral plate 1
A small tank 4 divided by 3 is formed. Spiral plate 1
The tip of 3 is inclined so as to face downward, and the passage 5
Are integrally formed with the small tanks 4, and the small tanks 4 are communicated with each other.

In this embodiment, since the spiral spiral plate 13 is provided inside the processing tank 2, the wastewater supplied from the drain pipe 1 spirally passes through the processing tank 2, The distance that the wastewater passes through the inside of the treatment tank 2 becomes longer, so that the treatment time of the wastewater can be lengthened, and the contact time between the wastewater and the wood chips can be lengthened. Another embodiment is shown in FIG. 3 (a), in which 1 is a drain pipe having a discharge port 10 opened downward, 2 is a treatment tank, and 1 is a drain pipe.
The processing tank 2 is disposed below the discharge port 10 of the above. The processing tank 2 is a cylindrical body having an open upper surface, in which a vertically long rotating shaft 6 is vertically provided, and a plurality of stirring blades 7 are attached to the rotating shaft 6. The rotating shaft 6 is connected to a motor 14 and is formed so as to be rotatable and driven. Figure 3
As shown in (b), the stirring blade 7 is formed into a substantially fan-shaped plane, and the stirring blades 7 arranged at the upper and lower sides are mounted at intervals so that the ends of the stirring blades 7 overlap each other. The stirring blade 7 is attached so as to be inclined so that its tip faces downward. A discharge port (not shown) is provided in the lower portion of the processing tank 2, and the discharge port is formed of a mesh-shaped metal plate or the like having a large number of through holes. The processing tank 2 is filled with wood chips.

In performing the treatment in the waste water treatment apparatus A thus formed, the waste water is supplied from the discharge port 10 of the drain pipe 1 onto the uppermost stirring blade 7 with the rotating shaft 6 stopped. Then, after supplying the waste water, the rotary shaft 6 is rotated and the waste water is passed through the wood piece while stirring the wood piece with the stirring blade 7. In this way, the wastewater 4 slowly moves downward, and the microorganisms generated and propagated on the wood chips decompose organic substances contained in the wastewater, and the wastewater after the processing is discharged from the drainage port to sewer or the like. ing. In addition, in this embodiment, the raw garbage may be thrown into the treatment tank 2 simultaneously with the drainage from the drainage pipe 1, and the wastewater treatment apparatus A may treat the raw garbage.

As described above, in this embodiment, since the vertically long rotating shaft 6 is disposed inside the processing tank 2 and the plurality of stirring blades 7 are inclined and provided on the rotating shaft 6, the rotating shaft 6 is provided. The waste water is treated by rotating the stirring blade 7 provided in the treatment tank 2
In addition to being able to diffuse inside, the distance through which the wastewater passes through the inside of the treatment tank 2 becomes longer, and the wastewater treatment time can be lengthened, and the contact time between the wastewater and the wood chips can be lengthened.

Another embodiment is shown in FIG. 4 (a).
This wastewater treatment device A is the one shown in FIG. 3 in which a guide plate 15 is provided above the uppermost stirring blade 7. As shown in FIG. 4B, the guide plate 15 has a circular shape in a plan view, and an inflow hole 16 that opens vertically is provided and the guide plate 15 is formed so as to incline toward the inflow hole 16. is there. The guide plate 15 is attached to the rotary shaft 6 so that its substantially central portion penetrates.

In the embodiment shown in FIG. 3, drainage is supplied from the outlet 10 of the drainage pipe 1 onto the uppermost stirring blade 7 with the rotary shaft 6 stopped, but in this embodiment, drainage is carried out. It does not matter whether the rotary shaft 6 is stopped or rotated when the liquid is supplied. In other words, in this wastewater treatment device A, the wastewater supplied from the discharge pipe 1 is once supplied to the upper surface of the guide plate 15 and is always supplied to the upper surface of the uppermost stirring blade 7 through the inflow hole 16 of the guide plate 15. Therefore, even if the drainage is supplied with the rotating shaft 6 being rotated, the distance through which the drainage passes can be prevented from being shortened.

FIG. 5 shows still another embodiment,
The treatment tank 2 of the wastewater treatment equipment A is a cylindrical body having an open upper surface, and a small tank 4 which is divided by a plurality of division plates 8 is formed inside the treatment tank 2 and the division plate 8 is perforated. The small tanks 4 formed above and below are communicated with each other by the communication holes 9. The dividing plate 8 is formed of a wire mesh, punching metal, or the like. Then, as in the above embodiment, each tank 4
The inside of the processing tank 2 is filled with wood chips, and an outlet (not shown) is provided at the bottom of the processing tank 2.

The waste water treatment apparatus A thus formed is
The wastewater is supplied from the discharge port 10 of the drainage pipe 1 into the treatment tank 2, and the wastewater is passed through the wood strip filled in the uppermost small tank 4,
After that, it passes through the communication hole 9 and passes through the wood chips filled in the small tank 4 formed therebelow. In this way, the wastewater passes through the small tank 4 in the lower stage one by one, and the microorganisms generated and propagated on the wood chips decompose organic substances contained in the wastewater.
The treated wastewater is discharged from the outlet to sewage.

As described above, in this embodiment, since the plurality of dividing plates 8 are provided inside the processing tank 2 and the communicating holes 9 through which the waste water passes are provided in the dividing tank 8, the dividing plates 8 are resistant to each other. Then, the speed of the wastewater supplied from the drainage pipe 1 passing through the treatment tank 2 becomes slower, the treatment time of the wastewater can be lengthened, and the contact time between the wastewater and the wood chips can be lengthened. .

[0021]

As described above, according to the present invention, since a plurality of partition plates are provided inside the processing tank, and each partition plate is formed with a passage through which drainage passes so as not to be lined up and down on a straight line, The wastewater moves in the treatment tank along the partition plate, passes through the passage, and moves to the next partition plate.
The wastewater meanders through the treatment tank, and the distance that the wastewater passes through the treatment tank becomes longer, so that the treatment time of the wastewater can be lengthened and the passage of the wastewater that passes through the wood strips. It is possible to prevent the speed from increasing and to sufficiently reduce the BOD of wastewater and the removal of SS.

Further, since the vertical rotating shaft is arranged inside the treatment tank and a plurality of stirring blades are inclined and provided on the rotating shaft, the stirring blade provided on the rotating shaft is rotated to treat the waste water. The wastewater can be diffused in the tank, and since the wastewater spirally passes along the stirring blade, the distance of the wastewater passing through the inside of the tank is increased, and the wastewater treatment time can be lengthened.

Further, since a plurality of upper and lower dividing plates are provided inside the treatment tank and a communication hole through which the wastewater passes is formed in each dividing plate, the division plates act as a resistance to prevent the wastewater from flowing, and the wastewater treatment tank. It is possible to lengthen the time it takes to pass inside.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing another embodiment of the above.

FIG. 3 (a) is a sectional view showing another embodiment of the same.
(B) is a plan view.

FIG. 4A is a sectional view showing another embodiment of the same.
(B) is a plan view.

FIG. 5 is a sectional view showing another embodiment of the above.

6A is a front view and FIG. 6B is a bottom view showing a conventional example.

[Explanation of symbols]

 1 Drain pipe 2 Treatment tank 5 Passage path 6 Rotating shaft 7 Stirring blade 8 Dividing plate 9 Communication hole 11 Partition plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kaho Izumisaka 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (3)

[Claims] 1. In a wastewater treatment apparatus for supplying wastewater into a treatment tank from a drainage pipe and decomposing the wastewater in the treatment tank, a plurality of partition plates are provided inside the treatment tank and upper and lower partition plates are provided. A wastewater treatment device comprising a passageway through which wastewater passes so that the wastewater does not line up in a straight line. 2. In a wastewater treatment device for supplying wastewater into a treatment tank from a drainage pipe and decomposing the wastewater in the treatment tank, a vertical rotating shaft is arranged inside the treatment tank and a plurality of agitators are stirred. A wastewater treatment device in which the blades are inclined and provided on a rotating shaft. 3. A wastewater treatment apparatus for supplying wastewater from a drainage pipe into a treatment tank and decomposing the wastewater in the treatment tank, wherein a plurality of upper and lower dividing plates are provided inside the treating tank, and draining water is applied to each dividing plate. A wastewater treatment device, characterized in that it is formed by forming a communication hole through which water passes.