JP3213071B2 - Vertical merger treatment 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 the improvement of a clarified wastewater treatment system for sewage buried underground in houses, small and medium-sized apartment houses or commercial facilities without sewage pipes. The present invention relates to an apparatus in which a water tank is housed in one vertical cylindrical body.

[0002]

2. Description of the Related Art In recent years, with the rapid expansion of urban areas, houses, small- and medium-sized apartment houses or commercial facilities have been constructed in areas without sewer pipes, and the drainage from these facilities has been subjected to simple treatment, followed by a sewer. Or they are released into rivers. In addition, in order to purify polluted rivers accompanying development, it is required to carry out simple purification treatment of wastewater as needed. These simple treatments of sewage are usually carried out by burying a ready-made septic tank combined with a sedimentation separation tank, a contact tank, a disinfection tank and the like in a premises at the time of construction of a house or facility, and performing piping.

[0003] Various types of conventional small-sized combined treatment septic tanks have been developed. As shown in Fig. 8, the septic tanks usually have a glass fiber reinforced plastic (FRP) shell structure in which a sedimentation separation tank, In general, the contact tank is arranged sideways.

[0004]

The septic tank is usually buried underground to the extent that only the opening with the upper lid is exposed to the ground surface, but the septic tank body becomes longer and longer as the capacity increases and the number of processing steps increases. Requires a lot of land. Further, in a conventional septic tank by the activated sludge method, there are structural limitations in mass transfer and mixing and stirring of oxygen and BOD components. If the septic tank is to be provided with the necessary functions, the tank body will be long, and if a flange or the like is provided on the outer surface of the septic tank to prevent floating from the groundwater, the site area required for burial will be even larger. .

[0005] In addition, when the amount of inflowing sewage to be treated suddenly increases, untreated liquid overflows and is sent to the next step in the horizontal merged treatment septic tank, and finally, untreated sewage is discharged to rivers and the like. May be done. The septic tank is planned for normal use, and a tank having a capacity corresponding to this is installed, so such accidents frequently occur and cause environmental pollution. An object of the present invention is to provide a small-sized combined treatment / purification tank that minimizes the required site area and improves economical treatment efficiency.

[0006]

In order to achieve the above-mentioned object, the combined treatment / purification tank of the present invention has a spirally-walled wall coaxial with a cylindrical axis inside a vertically elongated cylindrical tank closed vertically. The inside of the tank body is divided into two parts by being attached over substantially the entire length except for the upper and lower walls, and one of the divided parts is a sedimentation separation chamber (first chamber), and the other is a deep separation chamber (second chamber). A separation gutter is provided in front of the first chamber. An opening communicating with the second chamber and a hopper for collecting the sediment are provided between the lower end of the first chamber and the bottom wall of the tank. It is also possible to provide a disinfection room, a discharge pump room, etc. in the latter part (upper part) of the second room.

[0007] The spiral wall may have unevenness in a spiral staircase shape in addition to the smooth surface. The spiral stepped wall can be formed by vertically stacking a number of columnar blocks of the same length and rotating each block little by little about a central axis. It is also possible to integrally mold the outer cylindrical body and the inner spiral wall using a synthetic resin material. Provide a pipe for air lift near the center axis of the spiral wall body, that is, the axis of the cylindrical tank body,
Air is pumped into the vessel from a ground-based pumping facility, releasing air at appropriate locations on the spiral wall or near the bottom of the vessel. In addition, if the wall surface is formed of a porous plate, air bubbles of the air lift are assisted in staying in the tank, and the stripping effect is enhanced.

In the combined treatment / purification tank of the present invention, the precipitation / separation chamber can also serve as a regulating tank. Even if a large amount of inflow water enters at one time, the capacity of the sedimentation separation chamber is large, so that the wastewater can be collected as a regulating tank and treated water can be discharged after a certain period of time.

The combined treatment septic tank of the present invention is preferably made of a glass fiber reinforced plastic (FRP) shell containing a thermoplastic resin such as polypropylene or polyamide or a thermosetting resin such as polyester and, if desired, glass fiber as a core material. Formed in structure. Except for the upper and lower ends of the tank body, the outer cylindrical portion and the inner spiral wall are integrally formed. A cylindrical unit is formed with a half rotation or one rotation of the spiral as one unit, and the cylindrical unit is sequentially connected vertically by a groove fitting method, an electro bonding method, or another bonding method, and finally an upper and lower end portion is formed. By bonding, a vertical merging treatment septic tank of a desired length is completed.

[0010] The combined treatment septic tank of the present invention is usually used alone, but if one unit has insufficient capacity, two or more tanks can be used in combination. In this case, each unit can be combined and used as an independent sedimentation separation tank, a separation tank, which also functions as a water amount adjustment tank, and a sediment disinfection discharge tank.

[0011]

In the merged treatment septic tank of the present invention, wastewater is introduced into the first chamber by piping or the like, and large solids or large suspended matters are separated by the separation gutter provided in the preceding stage, and then gently along the spiral wall. To precipitate fine solids in the liquid. The spiral liquid flow is faster as it is closer to the axis of the spiral, that is, the central axis of the cylindrical septic tank, and becomes gentler as it is closer to the cylindrical wall, so that the precipitate is deposited near the junction between the bottom wall of the tank and the cylindrical wall. This is bundled in a hopper provided between the lower end of the spiral wall and the bottom wall,
Separate from sewage.

The sewage that has reached the bottom wall of the tank enters the second chamber through an opening provided between the spiral wall and the bottom wall, and starts rising. The second chamber is subjected to a treatment with a contact material and / or an aerobic microorganism, and sewage is purified in the process of ascending the second chamber. Air is vented in place on the spiral wall or near the bottom of the tank to aid in the rise of sewage and the action of aerobic microorganisms. The treated sewage is discharged out of the tank after adding chemicals as needed.

[0013]

[Example] In the merged treatment septic tank, a helical wall 2 coaxial with the cylindrical axis is attached to the inside of the tank except for the upper and lower ends of the tank. Is divided into two parts, and one part is separated into a sedimentation separation chamber (first chamber 3).
And the other is a deep-bed room (second room 4).

An inflow pipe 5 and a separation gutter 6 are provided at the front stage of the first chamber. The separation trough 6 is a bottomed sedimentation tank, which separates large solids and large suspended matters from the sewage which first flows in from the inflow pipe 5, and sends the overflow or passing flow to the next sedimentation separation chamber.

The sewage in the first chamber 3 descends between the inner wall of the tank 1 and the spiral wall 2 while drawing a spiral. During this time, fine particles in the sewage sediment and accumulate near the junction between the bottom wall of the tank 1 and the cylindrical wall. An opening 7 communicating with the second chamber 4 and a hopper 8 for collecting the sediment are provided between the lower end of the first chamber 3 and the bottom wall of the tank 1.

In the second chamber 4, to promote the plating action,
A known jaw-shaped contact material is inserted. Also, an aerobic microorganism can be arranged in this portion. In order to promote this kind of rubbing action and to promote the rise of liquid in the second chamber, an air lift pipe 9 is provided near the center axis of the spiral wall, that is, near the axis of the cylindrical tank body, and a pump on the ground is provided. Air is pumped from the equipment into the tank, and air is discharged from a number of air nozzles 10 provided on a semicircular plate provided at an appropriate position on the spiral wall or near the bottom of the tank. When the tank wall surface is formed of a porous material, the retention of air bubbles occurs, and the stripping action is promoted.

A disinfection chamber 11, a discharge pump chamber, a discharge pipe 12, and the like are provided at the latter stage (upper part) of the second chamber. The solid matter deposited on the separation gutter 6 in the first stage of the first chamber is a work manhole 13
Through the tank as appropriate. A hopper 8 at the bottom of the tank for collecting sediment deposits shall be able to withstand long-term use, but if necessary, a suction pipe to remove sediment deposits
14 may be provided.

The spiral wall 2 is provided with unevenness in a spiral step shape. As shown in FIG. 2, the spiral stepped wall can be formed by vertically stacking a large number of columnar blocks having the same length, and rotating each block little by little around a central axis. Further, as shown in FIG. 3, it is also possible to integrally mold the outer cylindrical body and the inner spiral wall using a synthetic resin material, with one unit of half rotation or one rotation of the spiral. As described above, the wall may be formed of a porous plate.

FIGS. 3 and 4 show a manufacturing process of a combined treatment / purification tank using a cylindrical unit in which an outer cylindrical body and an inner spiral wall are integrally formed by using the above synthetic resin material. Upper and lower walls 1
The cylindrical units 5 and 16 are each formed of a thermoplastic resin such as polypropylene or polyamide or a thermosetting resin such as polyester and a shell structure of glass fiber reinforced plastic (FRP) having glass fiber as a core material.

The upper and lower walls 15, 16 and the cylindrical unit 17 thus formed are suitably joined or bonded to complete a vertically long tank. When a thermosetting resin is used for bonding, a groove fitting method shown in FIG. 5 is used. Also, in the case of a resin body in which a foam layer is included in a thermoplastic resin skin layer, quick and reliable adhesion can be achieved by using the electrohond method shown in FIG. An appropriate number of wires 18 are inserted through the bonding surface, and the melting point of the resin material is 40 to
When a temperature higher by 50 ° is applied for a predetermined time, the bonding surface is melted, and the bonding surface is firmly bonded by expansion of the foam. If the band 19 is wound around the outside of the tank and tightened, the adhesive strength is further increased.

[0021]

[Effect of the Invention] The present invention is constructed as described above, and requires a smaller site area than a conventional horizontal merger treatment septic tank.
A large-capacity combined treatment septic tank can be obtained. Further, since the merged treatment septic tank of the present invention basically uses a spiral descent and ascending flow of the liquid to be treated, the fluid mixes well, the spiral wall is stepped, and the wall is formed of a porous material. Therefore, the separation and stripping action can be performed effectively and reliably, and economical and highly efficient sewage treatment becomes possible. Further, in the combined treatment / purification tank of the present invention, since the sedimentation separation chamber also functions as the regulating tank, overflow of untreated sewage which frequently occurs in the conventional type can be prevented beforehand, and the treated water can be reliably discharged in a certain time.

Further, since the tank body of the combined treatment septic tank according to the present invention is formed by joining or bonding together synthetic resin cylindrical units, the septic tanks having different capacities can be easily formed by changing the number of cylindrical units. . Further, on-site assembling of the tank body can be quickly performed by the groove fitting method and the electrobonding method, and the construction date can be shortened.

Further, in the case of the simultaneous type septic tank which uses the above-mentioned tanks in a simultaneous manner, the site area can be saved and the ability to store and control the amount of inflowed sewage is remarkable as compared with the conventional horizontal combined tank.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a vertical merged treatment septic tank of the present invention,
(a) is an overall view, (b) is a plan view of the air nozzle part in particular,
(c) shows the side view.

FIG. 2 is a view showing one embodiment of a process of forming a spiral stepped wall body.

FIG. 3 is a conceptual diagram of a cylindrical unit in which an outer cylinder and an inner spiral wall surface are integrally formed of a synthetic resin material.

FIG. 4 is an exploded view of a vertical merged treatment septic tank in which each part of the tank body is integrally formed of a synthetic resin material.

FIG. 5 is a partial conceptual view showing adhesion of a synthetic resin tank body by a groove fitting method.

FIG. 6 is a partial conceptual view showing adhesion of a synthetic resin tank body by an electrobonding method.

FIG. 7 is a conceptual diagram of a combined type combined treatment / purification tank in which many vertical combined treatment / purification tanks of the present invention are combined.

FIG. 8 is a conceptual diagram of a conventional horizontal merger treatment septic tank.

[Explanation of symbols]

 1 Tank 2 Spiral wall 3 First chamber 4 Second chamber 5 Inlet pipe 6 Separation gutter 7 Opening 8 Hopper 9 Air lift pipe 10 Air nozzle 11 Disinfection chamber 12 Discharge pipe 13 Work manhole 14 Suction pipe 15 Upper wall 16 Lower wall 17 Cylindrical unit 18 Wire 19 Band

Claims (9)

(57) [Claims] A helical wall (2) coaxial with a cylindrical axis is attached to the inside of a vertically long cylindrical tank (1) whose upper and lower parts are sealed over substantially the entire length except for the upper and lower ends of the tank. The inside of the body is divided into two parts, and between the lower end of the spiral wall body and the bottom wall of the tank, an opening communicating the inside of the divided tank body is provided.
One of the divided tanks is settled into a sedimentation separation chamber (first chamber (3)).
A vertical merged treatment septic tank characterized in that the other is a deep-walled chamber (second chamber (4)). 2. The vertical combined treatment / purification tank according to claim 1, wherein the spiral wall is formed by providing irregularities in a spiral step shape. 3. A separation trough (6) is provided in the front of the first chamber, and an opening communicating with the second chamber is provided between a lower end of the first chamber and a bottom wall of the tank.
The vertical combined treatment / purification tank according to claim 1 or 2, further comprising a hopper (8) for collecting the sediment and sediment. 4. A vertical combined treatment / purification tank according to claim 1, wherein a disinfection chamber (11) and a discharge pump chamber are provided at a rear stage (above) of the second chamber. 5. An air lift pipe (9) is provided near the center axis of the spiral wall body, that is, near the axis of the cylindrical tank body, and air is pumped into the tank from a pump facility on the ground, and the spiral wall body is placed in the proper position or The vertical combined treatment / purification tank according to any one of claims 1 to 4, wherein air is discharged near the bottom of the tank. 6. The tank body, except for the upper and lower wall portions (15, 16), is a cylindrical unit (17) in which an outer cylindrical portion and an inner helical wall member are integrally formed with one unit of a half turn or one turn of a spiral. ), The cylindrical units are sequentially connected vertically by a predetermined bonding method, and finally the upper and lower ends are bonded to form a purification tank having a desired length. Manufacturing method. 7. The method according to claim 6, wherein the tank body is formed of a reinforced plastic in which a reinforcing material such as glass fiber is sealed in a thermoplastic or thermosetting resin. 8. The method according to claim 6, wherein an electrobonding method is used as a method of bonding the upper and lower walls of the cylindrical unit and the tank body. 9. A simultaneous merger process comprising a combination of the vertical merger process tank according to claim 1 and / or the vertical merger process septic tank formed by connecting the cylindrical units. Septic tank.