JP7079628B2 - Purification trout - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law The 23rd Research Meeting on Groundwater / Soil Contamination and its Prevention Measures Sponsored by the Soil Environment Center, etc. Development and utilization of target leachate purification mass ”Koichi Uchiki, Norihiro Noda, p. 469-474, October 12, 2017 [Publications, etc.] Materials distributed at the 23rd Research Meeting on Groundwater / Soil Contamination and Prevention Measures Sponsored by the Soil Environment Center, etc., November 9, 2017 Day

The present invention relates to a purification mass that purifies contaminated water leached from the slope of an embankment structure such as a road.

Soil generated by the construction of tunnels and the like containing naturally derived heavy metals may be used, for example, for embankments on highways. Although the amount of water is small, contaminated water that does not meet the environmental standards may seep out from the slope of such an embankment.

Until now, such contaminated leachate was collected in a side ditch, etc., stored at the end of the stream, and then purified by a water treatment device with a complicated process, which complies with the environmental standards for public water areas of the Water Pollution Control Law. After that, it is released to rivers.

Regarding such a technique, for example, in Patent Document 1 (Japanese Unexamined Patent Publication No. 2002-193552), road wastewater guided from a gutter of a road is treated by a floating filtration device, and the treated water is public such as a river. It is disclosed that sludge generated from a floating filtration device is discharged into a water area and discharged to a sewer pipe or disposed of after dehydration treatment.
Japanese Unexamined Patent Publication No. 2002-193552

The purification method using a mechanical water treatment device as in the prior art is effective when the pollution state is high concentration and the treatment amount is large, but when the pollution state is low concentration or the water amount is high even at high concentration. If the amount is small, there is a problem that the construction cost of the facility, the chemical cost, and the daily maintenance cost are high, and the treatment of contaminated water is very costly.

In addition, when the amount of precipitation exceeds a certain level, not only leachate but also surface water on the slope is mixed, and although the pollution concentration is low, a large amount of water flows into the water treatment equipment, and the load on the water treatment equipment is constant. Therefore, there is also a problem that the operation management of the device becomes complicated and maintenance is required.

In order to solve the above-mentioned problems, the purification mass according to the present invention is provided between the side grooves of the embankment structure such as a road, purifies the water flowing in from the upstream side groove, and purifies the water flowing from the upstream side groove, and the downstream side groove. It is a purification mass that drains water to the water, and shields the space other than the mass body, which is the storage space for water, and the vertically lower side and the vertically upper side of the mass body, and the storage space is divided into the first tank on the upstream side and the downstream side. The overflow plate divided into the second tank on the side, the stone material laid vertically below the first tank and the second tank, and the water treatment agent contained in the first tank are included. Stones are spread all the way to the bottom of the overflow plate, and the water treatment agent is stored in a water-permeable bucket cage for each type, or the water treatment agent is placed in a water-permeable box-shaped clay bag for each type. It is characterized by being stored .

Further, the purification mass according to the present invention is characterized in that a plurality of types of water treatment agents are contained in the first tank.

Further, the purification mass according to the present invention is characterized in that a rubber sheet having an opening is arranged at the bottom of the bucket basket.

Further, in the purification mass according to the present invention, the box-shaped sandbags are stacked, and a rubber sheet having an opening is provided between one box-shaped sandbag and the box-shaped sandbags having a vertical relationship with the one box-shaped sandbag. It is characterized by being arranged.

Further, the purification mass according to the present invention is characterized by having a partition plate that shields a space other than the vertically lower side and the vertically upper side of the second tank and divides the second tank into two spaces.

Further, the purification mass according to the present invention is characterized in that the height of the upper end portion of the overflow plate is higher than the height of the upper end portion of the partition plate.

The purification mass according to the present invention includes an overflow plate that divides the storage space into a first tank on the upstream side and a second tank on the downstream side, and a stone material that is spread vertically below the first tank and the second tank. It contains a water treatment agent contained in a first tank, and according to such a purification mass according to the present invention, it does not include a complicated mechanical device configuration, and the configuration itself is simple and inexpensive. At the same time, daily operation management is almost unnecessary, and it is possible to reduce maintenance work and operation costs.

It is a figure which shows typically the cross-sectional structure of the road which used the tunnels containing the heavy metal of a natural origin as an embankment. It is a figure explaining the application example to the road of the purification mass 1 which concerns on embodiment of this invention. It is an exploded perspective view of the purification mass 1 which concerns on embodiment of this invention. It is a figure explaining the filling of the stone material and the water treatment agent in the purification mass 1 which concerns on embodiment of this invention. It is the schematic of the cross section of the purification mass 1 which concerns on embodiment of this invention. It is a figure explaining the purification mass 1 which concerns on embodiment of this invention in peacetime. It is a figure explaining the purification mass 1 which concerns on embodiment of this invention at the time of flooding. It is a figure explaining the purification mass 1 which concerns on embodiment of this invention at the time of a flood.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Soil generated by construction of tunnels and the like containing naturally derived heavy metals may be used, for example, for embankment of roads. FIG. 1 is a diagram schematically showing a cross-sectional structure of a road using tunnels and the like containing naturally derived heavy metals as embankments. The portion shown in the perspective portion in FIG. 1 is a portion where the tunnel slip is used as an embankment.

Contaminated water that does not meet environmental standards may seep out from the slopes or bottoms of structures such as roads that use tunnels as embankments, although the amount of water is small. The leachate from the slopes and bottoms of such structures is collected in gutters and discharged into rivers, etc., but it is necessary to purify the contaminated water so that it conforms to environmental standards and drainage standards.

FIG. 2 is a diagram illustrating an example of application of the purification mass 1 according to the embodiment of the present invention to a road. As shown in FIG. 2, for example, the purification mass 1 according to the embodiment of the present invention is provided in the middle of the gutter of the road, purifies the water flowing in from the gutter on the upstream side, and drains the water to the gutter on the downstream side. It has.

In the arrangement of the purification mass 1 according to the present invention shown in FIG. 2, one is provided for each side groove on both sides of the road, but the purification mass 1 according to the present invention has the contamination concentration in the side groove into which the contaminated water flows down and the contaminated water. Depending on the amount of water in the water, a plurality of them may be installed for purification.

In using the purified mass 1 according to the present invention, the treated water quality is monitored periodically, and even if the purified effect is deteriorated, by arranging a plurality of purified masses 1, the treated water is insufficiently treated. It is preferable to ensure the prevention of the outflow of contaminated water to rivers and the like so that the water can be purified by the purification mass 1 installed on the downstream side.

Next, the configuration of the purification mass 1 according to the present invention, which is arranged in the middle of the gutter as described above, will be described in more detail. FIG. 3 is an exploded perspective view of the purification mass 1 according to the embodiment of the present invention. Further, FIG. 4 is a diagram illustrating filling of a stone material and a water treatment agent into the purification mass 1 according to the embodiment of the present invention. Further, FIG. 5 is a schematic cross-sectional view of the purification mass 1 according to the embodiment of the present invention.

The mass main body 10 provided between the upstream gutter 3 and the downstream gutter 6 serves as a water storage space, and can be made of concrete or the like. Inside the mass body 10, an overflow plate 20 made of a stainless steel plate or the like is provided to shield a space other than the vertically lower side and the vertically upper side of the mass body 10. Since the lower part of the overflow plate 20 does not reach the bottom surface of the mass body 10, water can pass through the lower part of the mass body 10.

The space on the upstream side in the storage space of the mass main body 10 partitioned by the overflow plate 20 as described above is referred to as a first tank 31, and the space on the downstream side is referred to as a second tank 32. In the space vertically below the first tank 31 and the second tank 32, for example, stone materials are spread up to the lower end of the overflow plate 20 such as crushed stone and gravel.

The first tank 31 in the purification mass 1 according to the present invention is used as an adsorption tank for heavy metals of contaminated water and a neutralization tank. On the other hand, the second tank 32 in the purification mass 1 according to the present invention also functions as a diluting tank for contaminated water overflowing from the first tank 31 on the overflow plate 20.

Next, a specific configuration for configuring the first tank 31 as an adsorption tank and a neutralization tank will be described. In the purification mass 1 according to the present embodiment, the crushed stone (stone) 90, the arsenic adsorbent (water treatment agent) 91, the fluorine adsorbent (water treatment agent) 92, and the neutralizing agent (in order from the top of the first tank 31). By arranging the water treatment agent) 93, it is configured to purify the contaminated water. However, such a configuration can be appropriately adjusted depending on the type of heavy metal contained in the contaminated water that seeps out from the slope or the like.

Since the water treatment agent in the first tank 31 breaks down over the years, it is expected to be replaced. In the purification mass 1 according to the present invention, a bucket basket 50 having a mesh in which particles of the water treatment agent do not flow out is used in order to facilitate replacement of a plurality of types of water treatment agents arranged in the first tank 31. .. As such a bucket basket 50, a different one is used for each type of water treatment agent. Further, since water flows out from the mesh of the bucket basket 50, water permeability is guaranteed.

The top surface of the bucket basket 50 has an opening 56, from which various water treatment agents can be stored. Further, it is preferable that handles 58 are provided on the four sides forming the opening 56. By providing such a handle 58, the handleability of the bucket basket 50 in which the water treatment agent is stored is improved, and the replacement work of the water treatment agent becomes easy.

It is preferable that a rubber sheet 60 having an opening 63 partially provided is placed on the bottom surface of the bucket basket 50 before storing various water treatment agents. A plurality of bucket baskets 50 are used for vertically stacking a plurality of types of water treatment agents in the first tank 31, and the opening 63 of the rubber sheet 60 arranged in the bucket baskets 50 having a vertical relationship is shown in FIG. As shown, it is preferable to make them staggered (when viewed from above vertically). By adopting such a layout of the opening 63, it is possible to secure the permeation length when the contaminated water passes through various water treatment agents.

In this embodiment, the sandbags are stored in the bucket basket 50 for each type of water treatment agent, but the sandbags are made of a water-permeable material and have a rectangular shape (hereinafter, "box-shaped sandbags"). It is also possible to adopt a configuration in which the water treatment agent is stored. As such a box-shaped sandbag, one that can hold a water treatment agent and has water permeability is used.

In addition, when the water treatment agent is stored in a box-shaped sandbag and a plurality of box-shaped sandbags are stacked, between one box-shaped sandbag and the box-shaped sandbag that is vertically related to the one-box sandbag. It is preferable to arrange rubber sheets having openings as described above so that the openings of the rubber sheets are staggered in the stacking direction.

Further, it is preferable that the horizontal cross section of the box-shaped sandbag is slightly smaller than the horizontal cross section of the first tank 31. This improves workability when the box-shaped sandbag is taken in and out of the first tank 31.

On the other hand, it is preferable that the shape of the outer edge of the rubber sheet is set to be slightly larger than the horizontal cross section of the first tank 31. With this configuration, the shielding property between the outer edge of the rubber sheet and the inner wall surface of the first tank 31 is enhanced, and the contaminated water falls along the inner wall surface of the first tank 31 without being affected by the treatment agent. It is possible to prevent this from happening and to secure the permeation length when the contaminated water passes through various water treatment agents.

Further, the bucket basket 50 and the box-shaped sandbag may be used in combination to store the water treatment agent.

Further, in the second tank 32 of the purification mass 1 according to the present invention, the partition plate 40 that shields the space other than the vertically lower side and the vertically upper side of the second tank 32 and divides the second tank 32 into two spaces is provided. It is provided. The partition plate 40 provided in the second tank 32 promotes the dilution of the contaminated water overflowing on the overflow plate 20 immediately after the water flows out. Here, it is preferable that the height of the upper end portion of the overflow plate 20 is set higher than the height of the upper end portion of the partition plate 40.

Here, the ideal layout relationship in the purification mass 1 according to the present invention will be further described. As shown in FIG. 5, the downstream gutter 6 is used as a reference for the height in the vertical direction, the height of the upstream gutter 3 is H ₁ , the height of the overflow plate 20 is H ₂ , and the height of the partition plate 40 is H 1. If it is H ₃ ,
H ₂ ＞ H ₃ ＞ H ₁
It is preferable to have the relationship of. When having such a layout relationship, the purification mass 1 according to the present invention functions stepwise as described in (1) to (3) below.
(1) FIG. 6 is a diagram illustrating a purification mass 1 according to an embodiment of the present invention in normal times. When the amount of water in normal times is small, the contaminated water that has flowed into the purification mass 1 from the upstream gutter 3 passes through a water treatment agent such as an adsorbent or a neutralizer in the first tank 31 to be purified, and is purified in the second tank 32. It naturally flows down to the gutter on the downstream side.
(2) FIG. 7 is a diagram illustrating a purification mass 1 according to an embodiment of the present invention at the time of flooding. Immediately after flooding, highly concentrated contaminated water may flow in. When leachate and precipitation flow into the contaminated water that had stagnated in the upper part of the first tank 31 and the water level rises, the contaminated water overflows into the second tank 32 and is diluted with the purified water of the second tank 32. Natural drainage is performed from the purification mass 1 to the downstream side groove 6. At this time, the dilution of the second tank 32 is efficiently performed by the partition plate 40 provided in the upper part of the intermediate portion of the second tank 32.
(3) FIG. 8 is a diagram illustrating a purification mass 1 according to an embodiment of the present invention at the time of a flood. At the time of flood, uncontaminated water diluted with rainwater flows into the purification mass 1, overflows the upper part of the overflow plate 20 and the partition plate 40 as shown in FIG. 8, and is drained to the downstream side as it is.

As described above, in the purification mass 1 according to the present invention, the overflow plate 20 that divides the storage space into the first tank 31 on the upstream side and the second tank 32 on the downstream side, and the first tank 31 and the second tank 31. According to the purification mass 1 according to the present invention, a stone material laid vertically below the tank 32 and a water treatment agent contained in the first tank 31 are included, and a complicated mechanical device configuration is formed. It does not include it, the configuration itself is simple and inexpensive, and daily operation management is almost unnecessary, and it is possible to reduce maintenance work and operation costs.

Further, the purification mass 1 according to the present invention is suitable for purification when it is determined that the water treatment plant facility using the mechanical water treatment device is excessive in the treatment of a small amount and low concentration of contaminated water derived from nature. ..

Further, the purification mass 1 according to the present invention does not require electric power or power as compared with the water treatment plant facility as described above, and the installation / maintenance cost can be significantly reduced.

Further, according to the purification mass 1 according to the present invention, it suffices to install a purification mass 1 having a size suitable for the place along the gutter of the slope and the side groove of the slope, and a new water treatment plant facility or the like is installed. It has the advantage of not requiring land.

Further, according to the purification mass 1 according to the present invention, as in the cases of (2) and (3) above, during precipitation, the diluted contaminated water is not wastedly treated, and the adsorbent and the neutralizing agent are not used. The drug can be used efficiently by delaying the breakdown of the drug.

Further, according to the purification mass 1 according to the present invention, if the adsorbent and the neutralizing agent are broken, they can be replaced as many times as necessary, and the amount of the agent and the installation position are changed according to the purification effect. Can be done.

After the purification is completed, a removal cost is required for the water treatment plant and the like, but in the purification mass 1 according to the present invention, the purification mass 1 may be left behind, and the removal cost is not required.

1 ... Purification mass 3 ... Upstream side groove 6 ... Downstream side groove 10 ... Mass body 15 ... Lid body 20 ... Overflow plate 31 ... First tank 32 ... 2nd tank 40 ... Divider 50 ... Bucket cage 56 ... Opening 58 ... Handle 60 ... Rubber sheet 63 ... Opening 90 ... Crushed stone (stone)
91 ... Arsenic adsorbent (water treatment agent)
92 ... Fluorine adsorbent (water treatment agent)
93 ... Neutralizer (water treatment agent)

Claims (6)

It is a purification mass provided between the gutters of embankment structures such as roads, purifying the water flowing in from the gutters on the upstream side and draining it to the gutters on the downstream side.
The main body of the trout, which is a storage space for water,
An overflow plate that shields the space other than the vertically lower side and the vertically upper side of the mass body and divides the storage space into a first tank on the upstream side and a second tank on the downstream side.
The stones laid vertically below the first tank and the second tank,
Containing the water treatment agent contained in the first tank ,
Stones are spread all the way to the bottom of the overflow plate,
A purification mass characterized in that the water treatment agent is stored in a water-permeable bucket basket for each type, or the water treatment agent is stored in a water-permeable box-shaped sandbag for each type . The purification mass according to claim 1, wherein the first tank contains a plurality of types of water treatment agents. The purification mass according to claim 1 , wherein a rubber sheet having an opening is arranged at the bottom of the bucket basket. The box-shaped sandbags are stacked and
The purification mass according to claim 1 , wherein a rubber sheet having an opening is arranged between one box-shaped sandbag and the box-shaped sandbag having a vertical relationship with the box-shaped sandbag. One of claims 1 to 4 , wherein the space other than the vertically lower side and the vertically upper side of the second tank is shielded, and the second tank is provided with a partition plate for dividing the second tank into two spaces. Purification mass described in the section. The purification mass according to any one of claims 1 to 5 , wherein the height of the upper end portion of the overflow plate is higher than the height of the upper end portion of the partition plate.

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