JP2673865B2 - Septic tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a septic tank for treating wastewater such as feces and human waste biochemically by utilizing the action of microorganisms.

[0002]

2. Description of the Related Art Conventional septic tanks are composed of a precipitation separation chamber for separating and separating solid matter, a contact aeration chamber for contacting sewage from the precipitation separation chamber with a biofilm formed on the surface of a contact material, and a contact aeration tank. It consists of a settling chamber that separates the inflowing sewage into a supernatant and a settling sludge, and a disinfection chamber that adds disinfectant to the supernatant and then passes sterilized purified water to a sewer.

[0003]

The portion of human food that is not digested and absorbed is mostly light in specific gravity, and feces and paper that have once emerged rarely precipitate again. However, in conventional septic tanks, most of the feces have been treated as having a large specific gravity and a large proportion of sedimentation. In a conventional septic tank, it takes time to decompose and separate sedimentation of feces that have flowed into a sedimentation separation chamber by bacteria, and a portion of feces having a low specific gravity is laminated on the liquid surface including toilet paper.

As the days go by, the fecal layer becomes thicker,
The sedimentation chamber is covered with feces, and the contact between sewage and air is further reduced, which inhibits the action of aerobic bacteria. Feces accumulated in the tank emit a unique odor,
There are countless flies and maggots that fly into the living room and do not become unsanitary. For this reason, a pumping company is asked to clean once or twice a year, but the pumping fee is high, and the amount of pumping is not enough, so you have to put up with hygiene until you come to the pumping company.

Further, the purified water treated in the aeration chamber is pushed up into the sedimentation chamber, but as described above, the dietary fibers having a low specific gravity contained in the feces float without being treated without being precipitated. A partition plate is provided on the water surface portion of the precipitation chamber to prevent the floating substances from flowing out, but it often overflows and inevitably flows into the disinfection chamber that is the next chamber. Even in the disinfection room, the dirt floating on the surface of the water still has a yellowish odor even if disinfected, and emits some odor. In this type of septic tank, it is an aeration tank for sludge with a high specific gravity,
Although it is considered to be treated, this is a problem that occurs because treatment of sludge such as feces and toilet paper having a low specific gravity is not considered.

[0006]

In the septic tank of the present invention, an air pipe opening is provided at a position above the advection pipe opening of the settling separation chamber, and air is provided almost directly above the air pipe opening. Change the direction of the water flow caused by the rise to the direction along the water surface,
A modified decomposing device for physically decomposing filth accompanying the water stream.
(The upper baffle) is provided, and the lower surface of the changing and disassembling device is a flat plane, or the lower surface of the changing and disassembling device smoothly changes the flow direction. In addition, an uneven portion is provided on the lower surface of the changing and disassembling device for adjusting the amount of air ejected from the opening of the air pipe. The height of the opening is adjusted, the opening of the air pipe is provided in the upper layer of the sewage in the sedimentation chamber, and the direction of the water flow that rises with the rising of the air above the opening is the direction along the water surface. It is equipped with a changing disassembly device (upper baffle plate) .

[0007]

[Function] Part of the sludge digested by anaerobic microorganisms in the activated sludge accumulated at the bottom of the chamber becomes lighter because it contains gases such as methane gas and carbon dioxide gas generated by anaerobic digestion,
It floats on the surface of the water as scum. If the scum stays on the surface of the water for a long time, the scum accumulates and the surface dries and becomes a solid layer all over. In this case, the release of gas is hindered, the effective capacity for digestion becomes small, and the digestive action does not proceed. In the present invention, the air jetted from the opening of the air pipe in the settling / separating chamber rises, and the surrounding wastewater also rises accordingly. The rising flow of sewage is obstructed in the direction of flow by the changing and disassembling device installed almost directly above it, and the flow direction is changed suddenly or gradually to the direction along the water surface. It causes physical decomposition of sewage such as stool and solid stool. Next, the uneven surface provided on the lower surface of the modified decomposition device catches solid waste such as solid faeces and fibrous materials, toilet paper, etc. that flow with sewage, resulting in more detailed decomposition and increasing the area where microorganisms can attach. . In the upper part above the opening of the air pipe of the chamber, air sewage is circulated over the entire surface of the chamber, and aerobic microorganisms digest it. Since activated sludge exists at the bottom of the chamber, digestion by anaerobic microorganisms is performed in the lower part of the chamber to generate scum and odor.
However, in the upper part of the chamber, since the sewage is circulated along with the rise of the air, scum and odor do not rise above the water surface. The advection of sewage to the next chamber is performed from the opening of the advection pipe below the opening of the air pipe.

The air jetted from the opening of the air pipe in the settling chamber rises, and the surrounding dirty water rises accordingly. The rising flow of the dirty water is changed in the direction of the flow along the water surface by the changing and disassembling device provided right above. Above the opening, sewage is circulated by air over the entire surface of the chamber. According to the experiment, the dirt such as scum that has risen is descending or disappearing. The ratio of the upper part where the aerobic microorganisms are active and the lower part where the anaerobic microorganisms are active can be adjusted by moving the position of the opening of the air pipe up and down.

Further, the lower baffle prevents the circulation of sewage due to the air in the lower part of the chamber and does not hinder the action of anaerobic bacteria in the lower part of the chamber. Further precipitation chamber,
Even in the disinfection chamber, the effect is further enhanced by stirring and aerating the air ejected from the opening of the air pipe provided below the liquid surface. The amount of air jetted can also be adjusted by adjusting the height of the opening of the air tube.

[0010]

EXAMPLE FIG. 1 shows a state in which the present apparatus is installed in a general septic tank main body 1. The inside of the tank is divided into a precipitation separation chamber 2, an aeration chamber 3, a precipitation chamber 4, and a disinfection chamber 5. 2-1 is the inflow
Tubes 2-2 are advection tubes.

In this embodiment, a hole through which the air tube 6 passes is provided in the central portion of the lid 13, and an O-ring 12 for odor prevention is arranged between the end surface of the elbow 11 attached to the upper end of the air tube 6, It prevents the outflow of odors from the septic tank. The air pipe 6 is installed so that the opening of the air pipe 6 is located at a substantially mid-height position. The opening 7 may open the lower end of the air tube, or may provide a plurality of small holes on the side surface near the lower end of the air tube. In this case, the lower end of the air tube may or may not be open.

An upper baffle plate 8 is provided at a position slightly lower than the water surface. The upper baffle plate 8 has, for example, a disc-shaped main body portion and an uneven portion 9 provided on the peripheral edge portion. When the air rises along the air pipe 6 from the opening 8, the surrounding dirty water rises along with the rising air, and the upper baffle plate 8
The direction is changed by and it spreads toward the peripheral wall of the room. If the upper baffle plate is, for example, as shown in FIG. 5, the circulation of sewage smoothly occurs. In this way the opening 7
Circulation of sewage over the entire surface of the room due to the rise of air from around the area above. Solid feces, undigested fibers, toilet paper, etc. collide with the uneven portions 9 provided on the peripheral portion of the upper baffle plate 8 and are caught and decomposed. The uneven portion 9 may be provided with, for example, triangular unevenness on the peripheral portion of the upper baffle plate 9 as shown in FIG. 1, and may be simply bent downward, or as shown in FIG. May be. Alternatively, a rectangular plate-shaped member may be attached in parallel along the water stream, or a saw tooth-shaped member may be attached by welding or the like so that the teeth face the water stream. In short, it suffices that the solid matter, the fibrous matter and the paper collide with each other and are caught and physically decomposed. Further, if the upper baffle plate is formed so as to be recessed from the peripheral edge toward the center, as shown in FIG. 5, a circulating flow of sewage is likely to occur.

The lower baffle plate 10 provided at the lower portion of the opening of the air pipe 6 is, for example, in the shape of a disc and acts to prevent air from flowing into the lower portion of the precipitation separation chamber 2. However, it may not be provided when the ejection output is weak or when the opening 7 is not provided at the lower end. By doing this, the precipitation separation chamber can be moved up and down 2 times.
Substantially divided into chambers, the rising air causes the circulation of sewage to activate the aerobic bacteria, and the lower part prevents the inflow of air and activates the anaerobic bacteria.

The air from the air pump 28 is sent to the air pipe 6 through the air hose 29, the cheese 30, the telescopic hose 32, and the elbow 11. A flow rate adjusting valve 31 is provided adjacent to the cheese 30 to adjust the flow rate of air. In this embodiment, the ratio between the amount of air sent to the precipitation separation chamber and the amount of air sent to the precipitation chamber and the disinfection chamber is adjusted.

Further, a through hole is also provided in the lid 27 above the precipitation chamber 4 and the disinfection chamber 5, and as in the case of the precipitation separation chamber 2, the air pipe 2 via the O-ring 25 and elbow 26 for odor prevention.
Install 4. Cheese 30, flow rate adjusting valve 31, telescopic hose 33, elbow 26, air pipe 24, telescopic hose 2
3, air is sent to the air pipe 14 via the cheese 21, the air pipe (no reference numeral) and the elbow 19, and also to the air pipe 15 via the cheese 21, the telescopic hose 22 and the elbow 20. Below the water surface of the precipitation chamber 4 and the disinfection chamber 5, openings of air pipes 14 and 15 are provided, respectively. An opening may be provided at the lower end of the air tube as in the case of the air tube 6, or a plurality of small holes may be provided on the side surface to serve as the opening. The air pipes 14 and 15 are attached to the holes provided in the support plate 16 by the ring 1
8 and 19 and setscrews 34 and 35 are attached so that the height can be adjusted.

The air ejected from the openings of the air pipes 14 and 15 circulates sewage in the settling chamber and the disinfecting chamber, and finally performs stirring and aeration. Due to this action, the sewage, which had a slight yellow tint, becomes clear and clean water. It is very sanitary because it will be drained into the sewage. Air tubes 14, 1
As for No. 5, as shown in FIG. 2, when the cheeses 36 and 37 are used in place of the elbows 19 and 20, the efficiency is further improved.
Further, an upper baffle plate and a lower baffle plate may be attached. example
For example, above the liquid level of the air pipe hanging in the precipitation chamber, slightly above it.
A baffle plate is provided, and the lower baffle is placed below the opening of the air tube.
A plate is provided, and the upper baffle plate is from the periphery to the center.
Being formed to be dented, or the upper baffle plate
Provide a downward convexo-concave portion on the periphery of the
An air pipe opening is provided below the surface, and below the liquid surface above the opening.
Slightly below, there is a top
A baffle plate is provided, and the upper baffle plate is
It may be formed so as to be dented once.
Similarly, if the air pipe 6 provided in the precipitation separation chamber 2 is also bifurcated, the efficiency is improved.

The above is the case where the lid is provided with a hole in the existing septic tank to introduce the purifying device. However, as shown in FIG. 3, a bracket having a hole for passing an air pipe in the central portion on the back side of the lid 13 38 is attached with mounting screws 39 and 40, the air pipe 6 is covered with a blind lid 42 at the upper end, and a branch pipe 41 is provided. The expandable hose 43 branches the air supplied to the existing air diffusing pipe. You may do it. In this case, it is also necessary to increase the capacity of the existing air pump.

[0018]

According to the present invention, the opening of the air pipe is provided above the opening of the advection pipe of the precipitation separation chamber, and the direction of the water flow generated by the rise of the air is almost directly above the opening of the air pipe. change in the direction along the surface of the water, providing a physically decomposed changed cracker dirt that accompanied to the water flow, or the change amount
Since the lower surface of the dissolution apparatus is provided with an uneven portion so that the flow of water generated by the air discharged from the opening of the air pipe spreads over the entire surface of the chamber, the fecal layer such as scum is more finely decomposed, or it is treated as dirty water. As a result, the circulating feces, vegetable waste, toilet paper, and other contaminants are more finely decomposed, and the area occupied by microorganisms increases, resulting in efficient digestion. Since the device is simple and the existing septic tank can be easily attached, the septic tank can be used efficiently and sanitarily. In addition, the opening of the air pipe is provided in the upper part of the sewage in the sedimentation chamber,
A change / decomposition device that changes the direction of the water flow that rises with the rise of air to a direction along the water surface is provided almost directly above the opening, and a rising flow of dirty water is generated by the air ejected from the opening. Since the flow is obstructed above the opening and the direction is changed and the direction of the upward flow is along the water surface, the septic tank can be used efficiently and sanitarily. .

According to the experiment, it was floating in the precipitation separation chamber.
Dirt such as layered scum is surely disassembled for inspection.
There was almost no odor when the lid was released. Water surface
The feces rising above do not stay in their original form, and the sewage feels like muddy water.
There is no feeling of filth, and the fly and its larvae which are parasitic on the feces disappear
It was extremely hygienic. Also, use a septic tank
Even if the number of people
I was able to deal with it by adjusting the amount of energy.
In the settling chamber, scum and other dirt that has risen is lowered and
Disappeared. With the present invention, the sludge residue is very small.
It can be eliminated and thus freed from filthiness. In maintenance, pumping up with a vacuum car,
The need for transportation and reprocessing is extremely small, and the treated water with high cleanliness can be discharged only by replenishing the disinfectant solution, which is an effective device for environmental hygiene. Taken since the structure is simple
It is convenient for attachment , handling and cleaning.

[Brief description of the drawings]

FIG. 1 shows an example in which the present invention is applied to a general septic tank body.

FIG. 2 shows another example of how to attach an air pipe.

FIG. 3 shows an example in which air supplied to an existing air diffusing pipe is branched into an air pipe 6.

FIG. 4 shows an example in which a concavo-convex portion is formed by bending in two steps.

FIG. 5 shows an example in which the upper baffle plate is recessed from the peripheral portion toward the central portion.

[Explanation of symbols]

 1 Septic tank main body 2 Precipitation separation chamber 3 Aeration chamber 4 Precipitation chamber 5 Disinfection chamber 6 Air pipe 7 Opening 8 Upper baffle plate 9 Uneven portion 10 Lower baffle plate 11 Elbow 12 O-ring 13 Lid 14 Air pipe 15 Air pipe 16 Support plate 17 Ring 18 Ring 19 Elbow 20 Elbow 21 Cheese 22 Telescopic hose 23 Telescopic hose 24 Air tube 25 O-ring 26 Elbow 27 Lid 28 Air pump 29 Air hose 30 Cheese 31 Flow control valve 32 Telescopic hose 33 Telescopic hose 34 Set screw 35 Set screw 36 Cheese 37 Cheese 38 Bracket 39 Mounting screw 40 Mounting screw 41 Branch pipe 42 Blind lid 43 Telescopic hose

Claims (7)

(57) [Claims] 1. An opening of an air tube is provided at a position above the opening of the advection tube of the settling separation chamber, and the direction of the water flow caused by the rise of air is along the water surface at a position almost directly above the opening of the air tube. A septic tank provided with a changing and decomposing device that changes the direction and physically decomposes the dirt accompanying the water flow. 2. The septic tank according to claim 1, wherein the lower surface of the modified decomposition apparatus is a flat surface. 3. The septic tank according to claim 1, wherein the lower surface of the changing and disassembling device is formed by a curved surface that smoothly changes the flow direction. 4. The septic tank according to claim 1, wherein an uneven portion is provided on the lower surface of the modified decomposition apparatus . 5. The septic tank according to claim 1, wherein the amount of air jetted from the opening of the air pipe is adjusted. 6. The septic tank according to claim 1, wherein the height of the opening of the air pipe is adjusted. 7. A modification in which an opening of an air pipe is provided in an upper layer portion of sewage in the settling chamber, and a direction of a water flow rising as air rises is changed to a direction along a water surface at a position almost directly above the opening.
The septic tank according to claim 1, further comprising a disassembling device .