KR20090124660A - Open-type initial rainwater treatment system - Google Patents

Abstract

PURPOSE: An open-type initial rainwater treatment system is provided to offer good subsurface water penetration performance and purification performance about initial rainwater, and to obtain a space for constructing the system easily. CONSTITUTION: An open-type initial rainwater treatment system includes a ground planting part(10), a penetration filtering part(20), a lower part reservoir(30), a rainwater inflow part(40), and a rainwater overflow part(50). The ground planting part has a reservoir space(15) formed on a space lower than the ground surface. All kinds of the plants(11) are planted on the ground planting part. The penetration filtering part is laminated on the bottom of planting soil of the ground planting part. The lower part reservoir has an outlet(31) discharging the rainwater to a rainwater drain pipe(4).

Description

Open-type Initial Rainwater Treatment System

The present invention relates to a stormwater treatment system, and more particularly, in relation to a system for treating (draining and infiltrating) stormwater generated from a road or a residential complex, excellent in purifying pollutants and groundwater infiltration performance for initial stormwater. In addition, the present invention relates to an open rainwater treatment system that can easily secure space for constructing a system.

Increasing impermeability due to dense urban development and sudden heavy rains are limiting the ability to cope with flooding through sewage pipes and streams.Increasing impermeability due to urban development accelerates the desertification of cities and impedes the penetration of rainwater into groundwater. This causes many problems in the soil ecosystem.

Rainwater washes away various contaminants (non-point contaminants) such as heavy metals, organics, and oil deposited on the surface of the earth and becomes contaminated by these pollutants. If it is discharged to a river or the sea without proper treatment, it is the cause of water pollution. Therefore, the initial runoff pollution is one of the important nonpoint sources.

'Non-point source', also called non-specific source or surface source, is a source of pollution that has a wide and unspecific discharge path, such as urban road drainage by rainfall, unlike point source, which has a specific discharge path. When it comes to rain, it is discharged in the form of rainwater containing various kinds of pollutants such as traffic pollutants, dust and trash, and air pollutants in the surface drop. It is very large, difficult to predict and quantify pollution, and has characteristics that are highly influenced by weather conditions, geology, and topography, which are difficult to control artificially, and it is difficult to systematically set emission standards.

Considering the fact that water pollution and water shortage are becoming global issues due to urban development and population growth, Korea is also a water shortage country, considering that the rainfall is concentrated in summer, dams, rainwater pumping stations, reservoirs, reservoirs, etc. It is necessary to secure ecological soil environment and alleviate urban desertification through various systems such as rainwater use, infiltration, and storage, which manage rainwater that occurs in the area along with rainwater management.

A general stormwater treatment system is a system in which a reservoir is installed at the end of a basin in order to bury stormwater drainage and discharge rainwater collected by stormwater drainage into a stream. However, such a conventional storm water drainage system has been heavily loaded with pumping stations or other facilities during heavy rains, or contaminants such as heavy metals, organic matter, and oil contained in rainwater in urban areas flow into the reservoirs and flow into rivers. May cause.

Accordingly, eco-friendly stormwater penetration measures have been widely proposed to reduce the amount of runoff by naturally penetrating into the soil or storing water before the rainwater enters the reservoir.

The stormwater penetration system has been attempted as a security measure to improve the centralized rainwater management problem. There are types of landfills or pretreatment-focused types in existing facilities. However, existing systems have limitations in terms of completeness and inferiority in terms of element technology or system technology, and they cannot be connected to technologies such as landscaping, civil engineering, and complex planning for ecological external space creation. It does not cope and has only temporary storage or drip penetration.

In particular, in an environment with a narrow site and a high land price, such as a city in Korea, an excellent treatment system that can save space is required.

An object of the present invention is to provide a system for treating rainwater generated in a road or a housing complex, and particularly, an open rainwater treatment system having excellent purification ability of contaminants to contaminated initial rainwater and good groundwater penetration. It is to provide.

Another object of the present invention is not only a good contaminant purification ability and excellent groundwater penetration of the initial rainwater, but also the contaminant treatment, excellent rainwater of the initial rainwater without a great burden on the site securing under conditions difficult to secure the site for the system construction It is to provide an open stormwater treatment system that integrates infiltration and storage.

Another object of the present invention can be installed while maintaining the vegetation facilities to be built on the side of the road, and to expand the green space in the environment where the green space is encroached by the continuous urbanization, while the existing rainwater It is to provide an open stormwater treatment system that can be installed in conjunction.

Another object of the present invention is to provide an open rainwater treatment system that can be applied in the environment of heavy rainfall rainfall by being able to cope with rain load fluctuations from small rainfall to heavy rain.

Another object of the present invention is to provide an open stormwater treatment system that can collectively manage the non-point source in the drainage area by appropriately adjusting the unit of the system according to the rainwater or drainage area, such as rainwater treatment environment.

According to the present invention an open stormwater treatment system is provided.

The open rainwater treatment system according to the present invention includes a ground planting part, a permeation filtration part, a lower reservoir part, a rainwater inlet part and a rainwater overflow part.

The above-ground planting part has a storage space partitioned lower than the ground surface to allow the inflow and temporary storage of rainwater flowing through the ground surface, and various plants are planted.

The penetrating filtration unit is laminated under the planting soil of the above-ground planting part, and the rainwater penetrates to filter contaminants in the rainwater.

The lower reservoir has a discharge port which is stacked below the infiltration filtration part to store the rainwater that has passed through the infiltration filtration part and discharges the stored rainwater to an existing storm drain.

The rainwater inlet unit introduces the rainwater on the ground surface to the ground planting unit, and induces the rainwater introduced into the penetration filtration unit.

The rainwater overflowing section guides the rainwater to the lower reservoir before the rainwater reaches a full water level in the reservoir space of the above-ground planting part.

Preferably, the above ground planting portion is divided into a boundary stone to form the reservoir space, and the lower end of the boundary stone extends to the penetration filtration unit in a state spaced apart from the upper portion of the lower reservoir by a predetermined distance, and the boundary stone and Between the lower reservoirs form a passageway through which a portion of the rainwater penetrates into the surrounding soil.

Preferably, the permeation filter part is laminated between an upper filter layer capable of infiltration of the rainwater and filtering contaminants from the rainwater, and the filter layer and the lower reservoir, so that the filter layer is stored in the lower reservoir. It includes a filter mat to prevent falling to negative.

Preferably, the rainwater inlet comprises an inlet and opening capable of opening and draining the rainwater from the ground surface to the above-ground planting portion, and an inflow tube filled with a filter medium to induce the rainwater introduced into the inlet into the infiltration section. do.

The open rainwater treatment system according to the present invention has the following effects.

First, the stormwater treatment system of the present invention can protect the ecosystems such as soil, rivers and lakes by effectively managing nonpoint pollutants of early rainfall by inducing early rainwater purification and stormwater penetration for rainwater generated in roads or residential complexes. In addition, it can be expected to alleviate the heat island effect of the city due to stormwater penetration and the storage effect of rainwater.

Second, the stormwater treatment system of the present invention can realize the contaminant treatment, stormwater penetration, and storage of the rainwater in the early stage without a great burden on the site security in the difficult site for the system construction.

Third, the rainwater treatment system of the present invention can be installed in an open type while maintaining a vegetation facility constructed on a roadside, so that green space can be expanded in an environment where green space is encroached by continuous urbanization. It can be installed in conjunction with the storm pipe.

Fourth, the stormwater treatment system of the present invention can be effectively applied to an environment in which rainfall is heavily biased by being able to actively cope with the load fluctuations of stormwater from small rainfall to heavy rain.

Fifth, the rainwater treatment system of the present invention can collectively manage the non-point source in the drainage area by appropriately adjusting the unit of the system according to the rainwater treatment environment.

Sixth, the conventional device-type stormwater management system has a problem that its maintenance is difficult, because the stormwater management system according to the present invention is relatively less necessary post management, it is applied to roads and residential areas difficult to maintain non-point source It is effective to manage.

Hereinafter, with reference to the accompanying drawings will be described in more detail the open rainwater treatment system according to the present invention. The following embodiments are merely illustrative of the stormwater treatment system according to the present invention, and are not intended to limit the scope of the present invention.

The open rainwater treatment system 1 according to the present invention is a system that can be installed in an open type using a vegetation space commonly installed on a roadside or a central separator as an installation space, and can be installed in connection with an existing rainwater conduit 4. Therefore, the system 1 of the present invention is preferably installed in accordance with the gradient of the existing storm drain 4, which processes rainwater 2 from the ground surface 3 of a road or the like.

Rainwater treatment system 1 according to the present invention may be referred to as a kind of linear penetration system which is one of the distributed rainwater management system for the purpose of rainwater treatment in roads and residential areas.

As shown in Figure 1, the stormwater treatment system 1 of the present invention, the above ground planting portion 10, infiltration filtration portion 20, the bottom reservoir 30, rainwater inlet 40 and rainwater overflow section (50) is basically included.

The above-ground planting part 10 is partitioned lower than the ground surface 3 to form a storage space 15 so that rainwater 2 flowing through the ground surface 3 such as a road flows in and permits temporary storage according to a situation. Here, various plants 11 such as shrubs or grass are planted. For example, the bottom of the ground planting part 10 is formed about 20-40 cm lower than the ground surface 3, and is filled with planting soil 12 for smooth growth of the planted plant 11, The boundary is divided into, for example, a concrete boundary stone 13 to form a storage space 15 that is isolated from the external environment, thereby allowing the inflow and temporary storage of rainwater 2.

As shown in Fig. 1, the boundary stone 13 is an infiltration filtration unit 20 which will be described later in order to prevent the discharged water 2, which is less contaminated, is discharged directly to the adjacent foundation soil 5. It is preferable to install so as to extend to, and at this time, the lower end of the boundary stone 13 is maintained at a predetermined interval with the lower reservoir 30, the rainwater (2) of the infiltration filtration unit 20 to the surrounding foundation soil (5) A discharge passage 14 may be formed.

Thus, since the top of the system 1 of the present invention is composed of the ground planting portion 10, the existing vegetation space provided on the road or the like can be utilized to construct the stormwater treatment system, and conversely, the stormwater treatment system of the present invention ( Since 1) can be used as a vegetation space, it is not necessary to secure a separate space for the construction of storm water treatment system, thus saving the space required for the system construction and consequently, it is possible to gear to the conservation and expansion of the green space. .

In addition, the system (1) of the present invention can partially decompose pollutants of rainwater (2) by the natural biological decomposition of the plant (11) and the planting soil (12) constituting the ground planting section (10) Pollutant purification is very environmentally friendly.

In addition, since the system 1 of the present invention is landscaped by the plant 11 and the boundary stone 13 of the ground planting part 10, there is an effect that can produce an environment-friendly space suitable for roads and the like, and the ground planting part The shape and size of (10) can be variously determined depending on the installation place.

The penetrating filtration unit 20 is stacked below the above-ground planting unit 10 to penetrate the rainwater 2 and to filter various contaminants contained in the rainwater 2 penetrated.

To penetrate and filter the rainwater (2), the filter layer (20) is laminated with a filter layer (21), which is known to be able to penetrate and have filtration performance, such as ceramics such as zeolite, germanium ganban stone and clay. . As the filter layer 21, ceramics according to 'Korean Water Purification Bioceramic and Manufacturing Method thereof' (registered Feb. 19, 2008) of Korean Patent Registration No. 807175 may be applied.

Preferably, below the filter layer 21, the filter layer 21 is prevented from falling into the lower reservoir 30 below, and the above-described example having the penetration of the rainwater 2 and the filtration performance is described above. A filter mat 22 such as a ceramic mat filled with a filter agent 22a such as ceramic may be laid.

In this way, as the infiltration filtration unit 20 is laminated to the lower layer of the ground planting unit 10, the pollutants are purified to some extent by the plant 11 and the planting soil 12 while passing through the ground planting unit 10. Contaminants such as organic matter, heavy metals, oil and the like are removed from the rainwater 2 and the rainwater 2 introduced from the rainwater inlet 40 described later.

The lower reservoir 30, which is located below the infiltration filtration unit 20, is, for example, a coarse-shaped concrete structure (for example, a conduit) having an open top, and an infiltration filtration unit 20 thereon. And the ground planting part 10, while distilling the rainwater (2) that passed through the infiltration filtration part 20, the flow rate is reduced to distribute the intensive load of the pumping station and other facilities during heavy rains. It works to make it possible.

Since the lower reservoir 30 is a jaw structure of the upper opening, it must be able to support the penetration filtration unit 20 stacked thereon. For this purpose, an open upper surface of the lower reservoir 30 is formed in a grill shape. Alternatively, by forming a plurality of columnar structures in the inner space of the lower reservoir 30 to support the filter mat 22 thereon, the upper filter layer 21 may not be sag. Preferably, the bottom of the lower reservoir 30 may be covered with a mat 32 such as the aforementioned permeable filterable ceramic mat having antimicrobial properties to prevent decay of the rainwater 2 temporarily stored.

A discharge port 31 is formed downstream of the lower reservoir 30, and the rainwater 2 stored in the lower reservoir 30 through the discharge hole 31 is discharged to the existing storm drain 4.

The rainwater inlet 40 is configured to guide the rainwater (2) to the above-ground planting portion 10 and to guide the rainwater (2) introduced into the infiltration filtration unit 20, etc., preferably inlet 41 and inflow It consists of the barrel 42.

The inlet 41 is installed over the boundary stone 13 partitioning the above-ground planting part 10, thereby leading the rainwater 2 of the ground surface 3 toward the above-ground planting part 10, and the inflow of the rainwater 2 is prevented. To be smoothly formed to fit the gradient of the ground surface (3), as illustrated in Figure 2, it can be formed in various shapes and arrangements, it is possible to install only one (A) and to install a plurality of (B) It is also possible.

Preferably, the inlet 41 is provided with, for example, a meshable opening and closing grill lid 41a to filter out a relatively large foreign material from entering the inlet 42, while cleaning or filtering the filtered foreign object 42. To be open for access.

The inlet 42 is installed directly under the inlet 41, and the rainwater 2 introduced through the inlet 41 is guided to the infiltration filtration unit 20 before being introduced into the ground planting unit 10. .

Preferably, the inlet 42 is filled with a filter agent 42a to remove contaminants contained in the initial rainwater 2. As the filter agent 42a, a material having a usual filtration function such as crushed stone or ceramic can be filled and applied. In addition, the filter medium (42a) of the inlet 42 is preferably manufactured in the form of a cartridge to be easily separated and replaced when the filtration function is significantly reduced.

Rainwater (2) that has passed through the rainwater inlet (40) passes through the infiltration filtration unit (20) to penetrate into some adjacent foundation soil (5) or discharge through the lower reservoir (30) to the existing stormwater drainage (4). do.

Rainwater (2) introduced through the inlet (41) of the rainwater inlet 40 is basically introduced into the infiltration filtration unit 20 through the inlet tube 42, the capacity of the inlet 42 is large inflow amount Rainfall exceeding 2 (2) is introduced into the reservoir space 15 of the above-ground planting part 10 and penetrated into some planting soil 12, rainwater (2) that did not penetrate the reservoir of the above-ground planting part 10 ( 15) is temporarily stored.

However, due to the heavy rain, the rainwater (2) will overflow when it reaches the full water level of the reservoir space (15), the rainwater overflow portion (50) before the rainwater (2) reaches the full water level of the reservoir space (15) Rainfall (2) acts to guide the lower reservoir (30).

To this end, the upper end of the rainwater overflow section 50 is piped to a position slightly lower than the upper end of the boundary stone 13 of the above-ground planting section 10, and preferably the upper end of the rainwater overflow section 50 allows the water to pass through the lid 51. ) To block foreign material from entering.

In this way, it is possible to cope with a change in rain, such as a heavy rain, according to the configuration of the rainwater overflow section 50.

In the stormwater treatment system according to the present invention, the size of the reservoir 15 and the planting soil 12, the infiltration filtration unit 20 and the bottom reservoir 30 of the above-ground planting section 10 is rainfall basin area and rainfall Depending on the conditions of the initial rainfall pollution, etc. can be appropriately selected, for example, for the same area, each height is 35cm in the reservoir space 15, 30cm in the planting soil 12, 30cm in the infiltration filtration unit 20cm The lower reservoir 30 may be 65 cm or the like, and the lower reservoir 30 may be designed to be wider and higher beyond the area of the ground planting part 10 when the expected amount of storage is large.

The storm water treatment system 1 according to the present invention described above, as shown in Figure 4, can be installed as a unit block to be installed in the existing rainwater conduit 4 installed on the road 6, as necessary. The size and number of rainwater treatment system 1 applied to each unit can be appropriately selected according to stormwater conditions such as rainfall area and rainfall. Therefore, the stormwater treatment system of the present invention can be used in conjunction with the existing stormwater drainage system 4. Ability to manage nonpoint sources in the watershed as a whole.

Hereinafter, the flow of rainwater in the stormwater treatment system 1 according to the present invention will be described with reference to FIG.

First, when the rainwater 2 flows to the ground surface 3 due to rainfall, the rainwater 2 flows in through the inlet 41 of the rainwater inlet 40 installed in the boundary stone 13 of the ground planting portion 10. It flows into the cylinder 42, and in this process, a comparatively large foreign material is filtered in the inflow port 41, and the contaminant is primarily filtered by the filter agent 42a in the inflow cylinder 42.

Rainfall (2) of the inflow barrel (42) flows through or through the planting soil (12) in the periphery or directly into the permeation filter (20), in the process of the filter layer of the permeation filter (20) ( 21) and the contaminant is secondarily removed by the filter mat 22. At this time, some rainwater 2 of the inflow pipe 42 penetrates into the surrounding soil 5 and flows into the groundwater.

Rainwater (2) passing through the infiltration filtration unit 20 is introduced into the lower reservoir 30 of the lower portion, wherein a part of the rainwater (2) through the passage (14), the underlying soil (5) Penetrates into the groundwater.

The rainwater 2 of the lower reservoir 30 flows through the discharge port 31 to the rainwater conduit 4 to complete basic rainwater treatment of the stormwater treatment system 1 according to the present invention.

When the amount of rainwater (2) flowing through the rainwater inlet (40) exceeds the capacity of the rainwater inlet (40), the excess rainwater (2) is stored in the reservoir 15 of the above-ground planting section (10) Temporarily stored and stored water is penetrated through the planting soil 12 and discharged into the storm drain 4 through the infiltration filtration unit 20 and the lower storage unit 30, and the rainfall is large, so that the storage space 15 Rainwater 2 close to the full water level flows directly to the lower reservoir 30 through the rainwater overflow portion 50 and is discharged to the rainwater pipe 4. In addition, in this process, part of the rainwater 2 flows to the surrounding soil 5 through the open passage 14 between the boundary stone 13 and the lower reservoir 30 and is incorporated into the groundwater.

1 is a schematic diagram of an exemplary stormwater treatment system in accordance with the present invention;

2 is a schematic plan view of an exemplary stormwater treatment system in accordance with the present invention;

3 is a schematic view of an exemplary rainwater inlet applied to the stormwater treatment system according to the present invention;

Figure 4 is a conceptual diagram of an example of applying the storm water treatment system according to the present invention on the road.

<Explanation of symbols for the main parts of the drawings>

1: stormwater treatment system of the present invention 2: stormwater

3: surface 4: existing storm drain

5: soil 6: road

10: Ground Planting Division 11: Plant

12: Planting soil 13: Boundary stone

14: passage 15: reservoir

20: penetration filter 21: filter layer

22: filter mat 22a: filter agent

30: lower reservoir 31: outlet

40: rainwater inlet 41: inlet

41a: grill lid 42: inlet

42a: Filtrate 50: Rainwater overflow part

Claims (4)

A ground planting portion 10 having a storage space 15 partitioned lower than the ground surface 3 to enable the inflow and temporary storage of storm water 2 flowing through the ground surface 3 and to which various plants 11 are planted; An infiltration filtration unit 20 which is stacked below the planting soil 12 of the above-ground planting unit 10 and infiltrates the rainwater 2 to filter contaminants in the rainwater 2; The discharge port for stacking the rainwater (2) that is stacked under the infiltration filtration unit 20 and passed through the infiltration filtration unit 20 and discharges the stored rainwater (2) to the existing rainwater conduit (4) ( 31 is provided with a lower reservoir (30); A rainwater inlet 40 for introducing the rainwater 2 of the ground surface 3 into the above-ground planting part 10 and for introducing the rainwater 2 introduced into the permeation filter 20; And Rainfall overflow section 50 for inducing the rainfall (2) to the lower reservoir 30 before the rainwater (2) reaches the full water level of the reservoir space (15); It characterized in that it comprises an open rainwater treatment system. According to claim 1, The ground planting portion 10 is surrounded by the boundary stone 13 to form the reservoir space 15, the lower end of the boundary stone 13 of the lower reservoir 30 It extends to the infiltration filtration unit 20 in a state spaced apart from the upper portion, and between the boundary stone 13 and the lower reservoir 30, a part of the rainwater (2) is the amount of surrounding soil ( 5) An open storm treatment system, characterized in that it forms a passageway (14) for penetration into. The filter layer 21 of claim 1 or 2, wherein the permeation filtration unit 20 is capable of penetrating the rainwater 2 and filters the contaminants from the rainwater 2. And a filter mat 22 stacked between the filter layer 21 and the lower reservoir 30 to prevent the filter layer 21 from falling into the lower reservoir 30. Open rainwater treatment system. The rainwater inlet part 40 according to claim 1 or 2, wherein the rainwater inlet part 40 opens and closes and discharges the manure from the ground surface 3 to the ground planting part 10. And, the rainwater (2) introduced into the inlet (41) to the infiltration filtration unit 20, characterized in that it comprises an inlet 42 filled with a filter agent (42a), open rainwater treatment system.

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