JPH04354580A - Waste water treatment and device used for this method - Google Patents

Abstract

PURPOSE:To provide the pollutionfree treatment system which does not adversely influence environment by averting the flow of waste water which is once subjected to a cleaning treatment to rivers and water channels. CONSTITUTION:An air blow-out body 5, such as blow-out pipe 6, is disposed in the lowermost part and a rough shape material layer 9 is formed thereon. Fine granular materials, such as sand, is filled on the rough shape material layer 9 to form a drying chamber 12. A drain pipe 4 is opened in the drying chamber 12 to absorb and diffuse the drain water between the fine granular materials. Air is blown out of the air blow-out body 5 by driving a compressor 7 to evaporate moisture in accordance with the ascending of the air. The need for passing the waste water to the rivers, etc., is eliminated at all in this way.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a method for treating purified wastewater and an apparatus used therein.
In particular, the present invention relates to a method and device for treating wastewater that does not require discharging wastewater into a river or the like.

0002

BACKGROUND OF THE INVENTION In places equipped with sewerage systems and wastewater treatment systems, waste water from households and sewage from factories can be directly discharged into the sewerage system. However, in places where such equipment is not fully equipped, each household must have its own purification equipment, and after the sewage is purified by the equipment, the remaining wastewater is disposed of by discharging it into rivers or waterways. There is.

0003

[Problem to be solved by the invention] The problem with such a system is that even once purified, the wastewater may still contain substances that cause environmental pollution. That's true. For example, substances that dissolve in water, such as neutral detergents, cannot be completely removed by household purification equipment, and there is a possibility that they may remain in the wastewater and be disposed of in rivers, etc. is high. It is extremely undesirable for such wastewater to flow into fields through rivers and waterways, and since the wastewater has passed through purification equipment, it cannot be considered non-polluting.

[0004] The present invention has been made to solve the above-mentioned problems, and relates to a wastewater treatment method and device that eliminates the wastewater itself by evaporating it and does not cause any environmental pollution problems. It is.

[0005]

[Means for Solving the Problems] The wastewater treatment method according to the present invention evaporates purified wastewater to completely prevent the wastewater from flowing elsewhere. The waste water is allowed to permeate into a fine particle tank and evaporated by air blown out from below. Sand can be used as the fine-grained material, and the purpose of allowing the wastewater to soak into this fine-grained material is to make it easier for the water to diffuse and dry. It evaporates.

The wastewater treatment apparatus according to the present invention is for carrying out the above-mentioned wastewater treatment method, and includes an air blowing body connected to a pump at the lowest part. As the air blowing body, a blow blowing pipe having a plurality of blowing ports can be used. A rough profile layer is formed on the air blowing body. The coarse shaped material is an irregularly shaped member that is larger than the fine grained material, and is used to diffuse and spread air. As the rough shape material, gravel can be used. A drying tank filled with fine particles is formed on this coarse profile layer. Open the drainage pipe towards the drying tank.

[0007] A filth treatment layer that promotes the proliferation of bacteria may be provided in the drying tank. In order to completely dispose of the filth remaining in the wastewater, it promotes the growth of bacteria and prevents the generation of foul odors, etc. It may be made of a layer made of many stacks of shells, etc. It is also possible to cover the sides and bottom with concrete parts to prevent drainage from seeping into the surrounding ground.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on an embodiment shown in the drawings. In FIG. 2, A is a purification facility,
It consists of a sedimentation tank 1, a waste treatment tank 2, and a drainage tank 3. Each tank has an opening on the ground side for cleaning. Sewage from households and the like first enters the settling tank 1, where large garbage is settled. The water from which garbage has been removed enters the sewage treatment tank 2 where bacteria have grown. The water from which filth has been removed is drained into drain tank 3.
to go into. After fine contaminants are removed in the drainage tank 3, the water is drained outside through the drainage pipe 4. In FIG. 2, B is a wastewater treatment device according to the present invention, and this wastewater treatment device B
This is to evaporate the wastewater.

[0009] In FIG. 1, the waste water treatment device B is installed underground, and an air blowing body 5 is arranged at the lowest part. Although various types of air blowing body 5 can be considered, the illustrated embodiment employs a blow blowing pipe 6 having a plurality of holes. The blow outlet pipe 6 is connected to a compressor 7 placed on the ground, and air from the compressor 7 can be sent to the blow outlet pipe 6 through a pipe 8. The blow pipe 6 is branched into a plurality of pipes and arranged in parallel at the bottom. Alternatively, the air blowing body 5 may be a box-shaped object with a plurality of holes opened and placed on the bottom, or a bag-like object formed of cloth-like fibers may be placed and the air is blown out from the grains of the cloth. You can do it like this.

[0010] A rough profile material layer 9 is formed on the air blowing body 5. The coarse material is an irregularly shaped member such as coarse aggregate, which diffuses the blow from below and allows air to spread widely, and in the embodiment, gravel is used. The rough material may also be something like concrete chips or shells. This rough-shaped material layer 9 is once partitioned by a clogging prevention net 10, and further rough-shaped materials are piled up in layers. As the clogging prevention net 10, a synthetic resin net or the like can be used. A clogging prevention net 11 is further arranged on the rough profile layer 9.

[0011] Anti-clogging net 11 on the rough profile layer 9
A drying tank 12 is formed above. The drying tank 12 is filled with fine particles, and in the embodiment, sand is used as the fine particles. Fine particles absorb and diffuse wastewater to make it easier to dry, and in addition to sand, a wide range of other materials such as shell fragments and fine granular industrial waste can be used. The drainage pipe 4 is drawn into the drying tank 12 and is open. Blocks 13 are placed on the ground surrounding this drying tank 9 to prevent fine particles from scattering.

[0012] The case where the wastewater treatment method according to the present invention is carried out using the above-mentioned wastewater treatment apparatus B will be explained. The compressor 5 is driven to send air to the air blowing body 5. The blown air is diffused in the rough shaped material tank 9 and rises. The wastewater is absorbed and diffused between the fine particles in the drying tank 12, and the rising air contains this moisture, rises further, and evaporates from the ground surface as it is. In the experiment, the height h, width w, and depth l of wastewater treatment equipment B were each 1.
200mm, and if the blow is strengthened, about 1 per day
It is expected that approximately ,000 liters of wastewater can be evaporated. The amount of wastewater in a household is usually less than about 700 liters per day, and this scale of wastewater treatment equipment B can treat the wastewater equivalent to more than 10 homes. This means that it is not necessary for each household to have its own wastewater treatment equipment B, and by installing one, it is possible to use it as a communal wastewater treatment plant. However, it is not efficient to treat a large amount of wastewater with one treatment device B, so multiple treatment devices B each with a height h, width w, and depth l of 500 to 600 mm are installed, and the wastewater is treated little by little. It is better to split it up and let it flow and be processed. In other words, dispersing the wastewater as much as possible is a prerequisite for improving water evaporation, and employing a plurality of smaller treatment devices B is also a promising method for implementation.

FIG. 3 shows another embodiment of the wastewater treatment device B, in which the side and bottom surfaces are made of concrete.
This prevents drainage water from seeping into the surrounding ground and causing negative effects. The air blowing body 5 is provided not only along the bottom but also along the sides, and blows air not only from below but also from the sides so that drying can be performed more quickly. Further, a filth treatment layer 15 is provided within the drying tank 9. The filth treatment layer 15 is made of layered shells etc. to make it easier for bacteria to propagate, and this filth treatment layer 15 treats the filth remaining in the wastewater to suppress the generation of foul odors. You can also do it. Nets 16 are arranged above and below the waste treatment layer 15.

[0014]

[Effects of the Invention] The present invention has the above-described structure, and since wastewater is absorbed and diffused in the drying tank and evaporated by air, no wastewater is discharged into rivers or waterways. Therefore, there is no problem of environmental pollution caused by wastewater. The wastewater is absorbed and diffused by the fine particles in the drying tank, and then evaporated by blowing air, so the treatment is extremely quick.
It can treat large amounts of wastewater. Therefore, it can be installed even in places with limited space near cities, and it can also be used as a joint treatment facility for multiple households or businesses. Furthermore, since it uses fine particles such as sand and uses only a compressor as the driving source, it can be configured with simple equipment.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of a wastewater treatment device according to the present invention.

FIG. 2 is a conceptual diagram of purification equipment and wastewater treatment equipment.

FIG. 3 is a sectional view of another embodiment of the wastewater treatment device.

[Explanation of symbols]

A Purification equipment B Wastewater treatment equipment 1 Sedimentation tank 2 Sewage treatment tank 3 Drainage tank 4 Drain pipe 5 Air blowing body 6 Blow pipe 7 Compressor 8 Pipe 9 Rough profile layer 10　Clogging prevention net 11. Clogging prevention net 12 Drying tank 13 Block 14 Concrete section 15 Sewage treatment layer

Claims (8)

[Claims] 1. A method for treating wastewater, which comprises allowing purified wastewater to permeate into a drying tank filled with fine particles, and evaporating water in the drying tank with air blown out from below. 2. The wastewater treatment method according to claim 1, wherein sand is used as the fine particles. 3. An air blowing body connected to a pump is disposed at the lowest part, a coarsely shaped material layer is formed on the air blowing body, and a drying tank filled with fine particles is formed on the coarsely shaped material layer. A wastewater treatment device characterized in that a drainage pipe is opened toward the drying tank. 4. The wastewater treatment apparatus according to claim 3, wherein the air blowing body is a blow-off pipe having an open blow-off port. 5. The wastewater treatment device according to claim 3, wherein a layer of gravel is used as the rough shaped material layer. 6. The wastewater treatment device according to claim 3, wherein sand is used as the fine particles. 7. The wastewater treatment device according to claim 3, further comprising a filth treatment layer provided in the drying tank to promote the growth of bacteria. 8. The wastewater treatment device according to claim 3, wherein the sides and bottom are covered with a concrete portion that prevents drainage water from seeping into the surrounding ground.