JP2003225684A - Soil infiltration system sewage cleaning apparatus of capillary water collection and recovery type - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil infiltration system sewage cleaning apparatus of a capillary water collection and recovery type which is excellent in structural strength and is capable of stably maintaining high cleaning capability and efficiently recovering and recycling water after cleaning treatment while effectively utilizing the advantages of an existing sewage cleaning method by the soil capillary infiltration and bioreaction having excellent energy saving properties. <P>SOLUTION: A square box-like block 4 which has a robust skeleton of a ribbed section to improve air permeability and water collection efficiency and internally has a space to permit packing of filter media is installed within a water collection vessel 5 and a folded plate-like cap 2 having a section of a trapezoidal shape formed by side walls provided with a plurality of slit-like openings allowing the easy infiltration of the inflowing sewage into the soil 7 and a top surface arrayed with a plurality of apertures for gas venting and a trough 1 and a cut-off cap 3 are arranged in the block, by which these are securely supported, the structure strength is enhanced, the caving deformation by the pressure of the covering soil generated after embedment is prevented and the high cleaning capability is stably exhibited even under an increasing load. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capillary water collection type soil having excellent structural strength, high purification performance for sewage, and recollecting purified water for recycling. The present invention relates to an infiltration type wastewater purification device.

[0002]

2. Description of the Related Art Conventionally, when a discharge destination of wastewater after treatment of wastewater by a septic tank cannot be obtained, or as a discharge means having the ability to purify wastewater, a resin pipe or a permeable material having a plurality of holes The pipe is installed horizontally at a depth of less than 1m below the surface of the earth and buried, and the capillary infiltration trench is used to infiltrate into the underground while purifying it while infiltrating sewage into the soil. Some have a structure that installs a drainage pipe at the bottom of the trench to promote water discharge and enhances the ability of purification and discharge.

[0003]

In the conventional capillary infiltration trench, a pipe made of resin or permeable material having a plurality of holes is fixed and buried on a horizontally arranged supporting aggregate. Due to the structure, the cover soil is likely to be depressed due to pressure. Once the depression deformation occurs, the level of the inflowing sewage in the pipe becomes uneven, and the stagnation occurs, making it difficult to smoothly inflow the sewage from the outside, reducing the infiltration ability into the soil and impairing the original treatment capacity. If the depression further progresses, an accident such as breakage from the hole of the pipe may occur.
This structural vulnerability also applies to the drainage pipe installed at the bottom of the trench.

On the other hand, in the conventional structure in which a pipe having a cylindrical cross section is housed within the height of the inner surface of the side wall of the container whose upper part is opened,
If the amount of sewage inflow increases rapidly, the entire pipe will be submerged in the container. Therefore, if you expand the pipe inner diameter so that part of the upper part of the pipe is higher than the upper side of the inner surface of the side wall of the container,
This time, the volume that can be infiltrated between the inner surface of the side wall of the container and the outer wall surface of the pipe becomes narrower, so that it easily becomes saturated and the infiltration stops, and the anaerobic reaction is promoted around the surface where the outer circumference of the pipe and the surrounding soil contact, and Causes a clogging phenomenon due to the formation of a microbial film. Thus, in the conventional structure, the processing capacity is limited by the conditions of the width of the container, the height of the side wall, and the inner diameter of the pipe.

Once the amount of sewage inflow exceeds the limit of treatment capacity and the sewage accumulates in the pipe, decomposition of pollutants by microorganisms proceeds in the sewage to generate gas such as carbon dioxide. This gas accumulates in the upper part of the pipe, reducing the area where the wastewater and soil that stays in the pipe contact,
The gas pressure causes serious chain dysfunction such as blocking the inflow of sewage.

[0006] In recent years, from the viewpoint of environmental protection, even if the water quality meets the environmental standards after the purification treatment by the capillary infiltration trench, the fact that the water is loosely permeated and released into the soil itself is a conservation of water quality. There is also an opinion that it is not desirable for this reason, and it is a situation that it is required to minimize the amount of discharge to the environment together with further improvement of purification performance. On the other hand, companies and the like are demanding a sewage purification device that can be recycled as miscellaneous water after sewage is purified.

Based on the above circumstances, it is known that the energy required for purification is known to be minimal, and the structural strength is improved while taking advantage of the method of purifying sewage by soil infiltration and soil infiltration of soil. An object of the present invention is to provide a capillary water collection type soil infiltration type sewage purification device which is excellent and can stably maintain a high purification capacity, and can efficiently collect and reuse the purified water.

[0008]

In order to solve such a problem, the present invention has a rigid skeleton having a rib-like cross section and an opening in a side wall surface which is made of a water impermeable material that does not decompose in soil and water. It has a space inside which improves the air permeability and water collection efficiency and can be filled with a filter medium, and is installed under the folded plate-like lid and the folded plate-like lid and the water stop lid to structurally support them. A box-shaped block is installed and has a side wall with a plurality of slit-shaped openings through which sewage that flows inside can pass outward and an upper surface with a plurality of openings for venting gas. Folded plate-shaped lid and gutter and water stop made of metal, resin, or ceramic whose upper surface forms a trapezoidal cross-section space that is higher than the upper side of the side wall of the gutter by covering the bottom of the wall inside the gutter By assembling and arranging the lids, the structural strength is increased and folded. The buried objects such as Jo lid was to be firmly supported. As a result, the depression deformation due to the pressure of the coated soil is prevented, and even if the processing load of the inflowing sewage increases, a high purification capacity is stably exhibited. At the same time, a square box-shaped block is installed in the water collection container and filled with the filler, so that the filler and the contact oxidation during the process of infiltrating the soil and infiltrating the purified water to collect water. By further purifying by filtering, the purification capacity is enhanced and the recovery efficiency for practical use of recycling is greatly improved.

[0009]

1 is a cross-sectional view showing the construction of a capillary water collection and recovery type soil infiltration type sewage treatment apparatus of the present invention. FIG. 2 shows the configuration of FIG. 1 in a perspective view. FIG. 3 is a perspective view of the folded plate-shaped lid 2 of the present invention. FIG. 4 is a perspective view of the box-shaped block 4 of the present invention. Hereinafter, description will be given with reference to FIGS. 1, 2, 3 and 4.

Reference numeral 1 is a gutter made of a water-impermeable material that does not decompose in soil and water, and has both ends closed by side walls and an open upper surface. One of the side walls is provided with an opening for inflowing sewage. . 2 has a side wall provided with a plurality of slit-shaped openings and a top surface in which a plurality of openings are arranged for degassing, and is placed in the gutter so as to contact the bottom sides of both long side walls of the gutter so that the position of the top surface is the side wall of the gutter It is a folded plate-shaped lid made of metal, resin, ceramics or the like to form a trapezoidal cross-section space 12 higher than the upper side. Reference numeral 3 is a water-stop lid made of a water-impermeable material that does not decompose in soil and water and having a box-shaped cross section with an open lower surface.

4 is a space made of a water-impermeable material that does not decompose in soil and water, has a rigid skeleton with a rib-shaped cross section and has an opening in the side wall surface to improve air permeability and water collection efficiency, and a space in which a filter medium can be filled. It is a box-shaped block that has, inside, and is installed under the folded plate-shaped lid and the folded plate-shaped lid and the water blocking lid to structurally support them. Reference numeral 5 is a water collection container having a box-shaped cross section, which is made of a water-impermeable resin film that does not decompose in soil or water and has an open top surface and one or more pumping outlets 9 for collecting water at the bottom of the side wall surface. Is.

Reference numeral 6 is a spherical or pellet-shaped filler made of a material having a fine porous structure and not decomposed in soil or water. 7 is an artificial soil such as humus soil, bio-sand or upland soil, which is mixed with a plurality of soils which are rich in air permeability and infiltration ability and are suitable for the activity environment of microorganisms, to enhance the purification ability of sewage water by microorganisms and small animals in the soil. is there. Reference numeral 8 denotes a net that covers the folded plate-shaped lid 2 and the box-shaped block 4 and the filler 6 arranged in the water collecting container 5 and lays it between the artificial soil 7 and induces a capillary phenomenon to enhance the infiltration property.

As shown in FIG. 1, a folded plate-shaped lid 2 is placed on the inside of a gutter 1 to form a space 12 having a robust trapezoidal cross section after being buried in an artificial soil 7. The sewage that has flowed into the gutter can flow evenly and quickly to the tip of the gutter by flowing in this space. As shown in FIG. 3, the folded plate-shaped lid 2 is responsible for forming the side wall surface and the upper surface of the space 12, and the side wall surface of the lid 2 is provided with a plurality of slit-shaped openings 11 whose long sides extend in the vertical direction. ing. As shown in FIG. 1, the sewage flowing into the space 12 easily passes through the mesh 8 covering the slit-shaped opening 11 and infiltrates into the surrounding artificial soil 7 by the capillary guide.

Since the cross section of the artificial soil 7 is widened in the direction of infiltration, the soil volume required for purification while holding sewage is secured by infiltration. Also,
When the sewage water level in the space 12 suddenly changes, the slit-shaped opening 11 always bears the water amount load evenly, so that the purification performance can be buffered even when the flow rate load changes for a short time. . As shown in the cross section of FIG. 1, the top surface position of the folded plate-shaped lid 2 is higher than the upper side of the side wall of the gutter and forms a trapezoidal cross-sectional space 12. Therefore, the space inside the side wall of the gutter is filled with dirty water. However, since the upper part of the slit-shaped opening 11 and the opening part of the upper surface are located higher than the inside of the side wall of the gutter, the purifying function is not lost even when the submerged state is reached.
The generated gas is also easily exhausted. In this way, it is possible to prevent the occurrence of troubles due to the reduction in processing capacity, and to exert stable purification capacity.

The water-stop lid 3 is made of a water-impermeable material that does not decompose in soil or water and has a box-shaped cross-section with an open lower surface. Prevent it from flowing in the state. Box-shaped block 4
Is made of a non-permeable material that does not decompose in soil and water, and has a rigid skeleton with a rib-shaped cross section for high rigidity and weight reduction. The side wall has a large opening and has a space inside which can be filled with a filter medium that activates a microbial reaction by ensuring air permeability and improves water collection efficiency. Further, they are installed under the gutter 1, the folded plate-shaped lid 2 and the water blocking lid 3 to firmly support them structurally.

The water collecting container 5 is made of a water-impermeable resin film that does not decompose in soil and water, and has an open top surface and a pumping port 9 for collecting collected water at the bottom of the side wall. It is a water collecting container having a box-shaped cross section provided as described above. The filler 6 has a fine porous structure and is spherical or pellet-shaped, and is made of a material that does not decompose in soil or water.
By filling the lower part of the artificial soil, the density of the infiltration space is reduced to increase the water collection rate, and at the same time, the microporous structure of the material functions as a reactor layer that promotes the purification reaction by microorganisms.

The artificial soil 7 is a principle of water purification in the present invention and is an essential material for the generally known soil purification method. In the present invention, the device is embedded in a soil environment which is particularly rich in capillary induction and infiltration ability and in which the decomposition reaction of pollutants by the biolayer in the soil is effectively maintained. Therefore, artificial soil 7 is artificially mixed with a plurality of soils such as humus soil, bio-sand, upland soil, etc., which are rich in air permeability and infiltration ability, and the purification ability of sewage by microorganisms and small animals in the soil is enhanced.

The mesh 8 covers the folded plate-shaped lid 2 and the box-shaped block 4 and the filling material 6 arranged in the water collecting container 5 and is laid between the mesh 8 and the artificial soil 7 so that the soil collapses in each space. Slit-shaped opening 1 at the same time to prevent burrowing and burial
Part 1 has the effect of inducing sewage into a capillary phenomenon to promote infiltration.

According to the present invention, a box-shaped block 4 shown in FIGS. 1 and 2 is constructed by laying a water collecting container 5 in contact with the floor and all wall surfaces of a rectangular trench excavated and covering the outer periphery with a net 8. It is arranged at the center of the inner bottom side of the water collecting container 5, and subsequently, a filling material 6 is filled between the water collecting container 5 and the inner wall surface of the water collecting container 5 and the upper surface thereof is covered with a net 8 to stop the upper surface of the box-shaped block 4. The gutter 1 is placed after covering with the water lid 3, and the folded plate-shaped lid 2 covered with the net 8 is stored on the inner bottom surface of the gutter 1, and then the artificial soil is filled and buried underground. The sewage introduced into the stored folded plate-shaped lid 2 is continuously infiltrated through the slit-shaped opening 11 through the net 8 into the artificial soil 7 filled in the periphery while crossing the side wall of the gutter 1 by the capillary phenomenon. Then, the space inside the box-shaped block 4 installed in the water collection container 5 while performing the purification treatment in the artificial soil. So that the treated water is collected at the bottom of the water collecting container 5 while permeating into the layer of the filler 6 and further purification treatment, and is taken from the pumping port 9 at the bottom of the wall surface of the container for reuse. did.

[0020]

The device according to the present invention is a rectangular box having a rigid skeleton with a rib-shaped cross section inside the water collecting container, and having a space inside which can improve the air permeability and the water collecting efficiency and can be filled with a filter medium. -Shaped plate with a trapezoidal cross section formed by a side wall with a plurality of slit-shaped openings that can easily infiltrate the soil into the soil and an upper surface with a plurality of openings for venting gas. By arranging the lid, gutter, and water shut lid, it is possible to firmly support them in the soil and increase the structural strength,
It is possible to prevent depression deformation due to the pressure of the coated soil that occurs after burial, and it is possible to stably exhibit a high purification capacity even when the load increases, which is excellent.

By installing a rectangular box-shaped block in the water collecting container and filling the filling material, infiltrated and purified water is infiltrated into the soil and is further contact-oxidized with the filling material in the process of collecting water. Therefore, the purification capacity is improved as compared with the conventional technique, and the recovery efficiency for practical use of recycling is excellent. As an actual example, in the result of the proof experiment of the present invention, no depression occurs, and it is 1 with respect to the design value of the initial processing load capacity.
Performance is maintained even during 150% overload operation for 0 minutes, and BOD (biochemical oxygen demand) = 200, which is usually set as the concentration of raw water flowing into general combined septic tanks.
Sewage water before and after (mg / L) can be continuously recollected while purifying to about 1 (mg / L), which is an excellent solution to the problem.

[Brief description of drawings]

1 is a cross-sectional view of the present invention.

FIG. 2 is a perspective view of the present invention.

FIG. 3 is a perspective view of a folded plate-shaped lid 2 of the present invention.

FIG. 4 is a perspective view of the box-shaped block 4 of the present invention.

[Explanation of symbols] 1 ... gutter 2… Folded plate lid 3… Water lid 4… Box-shaped block 5… Water collection container 6 ... Filling material 7… Artificial soil 8… Net 9… Pumping outlet 10 ... Opening hole for degassing 11… Slit-shaped opening 12 ... Space of trapezoidal cross section

Claims (2)

[Claims] 1. A gutter made of a water-impermeable material that does not decompose in soil or water and having side walls closed at both ends and an open upper surface, and a plurality of slit-shaped openings through which sewage can pass outwardly. Trapezoidal cross section where the upper surface is higher than the upper side of the side wall of the gutter by covering the long side of the gutter in the gutter so that it touches the bottoms of both side walls. Metal- or resin- or ceramic-made lid that forms the space of, a water-stop lid with a box-shaped cross-section with an open bottom made of a water-impermeable material that does not decompose in soil and water Also, it is made of non-permeable material that does not decompose in water. It has a rigid skeleton with a rib-shaped cross section and an opening in the side wall surface. It has a space inside which can improve the air permeability and water collection efficiency and can be filled with filter media. Of lid and folded plate-shaped lid and water-stop lid Box-shaped block that is installed on the floor to support them structurally, a water-impermeable resin film that does not decompose in soil and water, and has an open top surface that allows the outlet for the collected water to be collected at the bottom of the side wall surface. One or more water collection container with box-shaped cross section, spherical or pelletized filler made of a material that has a fine porous structure and does not decompose in soil or water, humus soil, bio sand, upland soil, etc. Artificial soil with a mixture of multiple soils that are highly breathable and infiltrative and suitable for the activity environment of microorganisms to enhance the ability to purify sewage by microorganisms and small animals in the soil. Capillary water collection recovery type soil-infiltrated wastewater purification, characterized by comprising a net laid between a lid and a box-shaped block and a filling material and artificial soil to induce capillary action to enhance the infiltration property. apparatus. 2. A trough made of a water-impermeable material that does not decompose in soil and water and having side walls closed at both ends and open upper surfaces, and a plurality of slit-shaped openings through which sewage flowing in can pass outward. Trapezoidal cross section where the upper surface is higher than the upper side of the side wall of the gutter by covering the long side of the gutter in the gutter so that it touches the bottoms of both side walls. Metal- or resin- or ceramic-made lid that forms the space of, a water-stop lid with a box-shaped cross-section with an open bottom made of a water-impermeable material that does not decompose in soil and water Also, it is made of non-permeable material that does not decompose in water. It has a rigid skeleton with a rib-shaped cross section and an opening in the side wall surface. It has a space inside which can improve the air permeability and water collection efficiency and can be filled with filter media. Of lid and folded plate-shaped lid and water-stop lid Box-shaped block that is installed on the floor to support them structurally, a water-impermeable resin film that does not decompose in soil and water, and has an open top surface that allows the outlet for the collected water to be collected at the bottom of the side wall surface. One or more water collection container with box-shaped cross section, spherical or pelletized filler made of a material that has a fine porous structure and does not decompose in soil or water, humus soil, bio sand, upland soil, etc. Artificial soil with a mixture of multiple soils that are highly breathable and infiltrative and suitable for the activity environment of microorganisms to enhance the ability to purify sewage by microorganisms and small animals in the soil. It consists of a net that covers the lid and box-shaped block and the filler and lays it between the soil and artificial soil to induce capillary action to enhance the infiltration property.The water collection container is in contact with the wall of an empty trench excavated in a rectangle below the surface of the earth. And lay it with a net Place the covered box block in the center of the inner bottom of the water collection container, fill the space between the inner wall surface of the water collection container and the filling material, and cover the top surface with a net. After covering the gutter with a lid, put the gutter inside the gutter so that it touches the bottom of the long side walls of the gutter, cover it with a net, fill it with artificial soil and bury it underground, and store it inside the gutter. The sewage introduced into the folded plate-shaped lid is continuously infiltrated into the artificial soil filled in the periphery while crossing the side wall of the gutter by the capillary phenomenon through the net from the side slit-shaped opening of the folded plate-shaped lid, Treated water at the bottom of the water collecting container while further purifying it by infiltrating the space inside the box-shaped block installed inside the water collecting container and the packed layer of the packing material while performing the purification process in artificial soil. Collecting water,
Capillary water collection type soil infiltration type sewage purification device that can be reused by drawing water from the outlet on the bottom of the container wall.