KR100668479B1 - Non-point source contaminant treatment system - Google Patents

Abstract

A non-point contaminant source treatment system is provided to prevent the contamination of the public water area and the underground water. A concrete box(10) includes an inflow port(11) and a cover surface(13). The inflow port is opened and outflow water is transferred via an outside inclination surface(13). The first hole discharge pipe(20) collects the outflow water treated at a hollow member of the concrete box and transfers the outflow water to a public water area. The second hole discharge pipe(30) includes holes formed at the bottom of the concrete box so that the outflow water is infiltrated into the underground. A bypass pipe(40) is installed at the hollow portion of the concrete box.

Description

Non-point pollutant treatment system {NON-POINT SOURCE CONTAMINANT TREATMENT SYSTEM}

1 is a perspective view of a non-point pollutant treatment system according to the present invention.

FIG. 2 is a bottom perspective view of FIG. 1. FIG.

3 is an exploded perspective view of a nonpoint pollutant treatment system before the soil media is filled;

4 is a plan sectional view of a non-point pollutant treatment system before the soil media is filled;

5 is a side cross-sectional view of a non-point pollutant treatment system in which a soil filter layer is filled and plants are planted.

6 is a roadside installation state of the non-point pollutant treatment system according to the present invention.

Explanation of symbols on the main parts of the drawings

10 concrete box 11: inlet

12: cover surface of the concrete box 13: outer slope

20: first perforated drainage pipe 30: second perforated drainage pipe

40: bypass pipe 50: soil filter layer

60: soil cover 70: plants

80: shroud

The present invention relates to a non-point pollutant treatment system, and more particularly, to efficiently clean the non-point pollutant spilled during rainfall by using filtration through soil and a biological treatment method by plants and microorganisms at the same time. Through the pollutant source management method, which installs pollutant treatment system near pollutant sources such as impervious areas, away from the end treatment method, the entire basin can be managed equally to prevent public water and groundwater contamination caused by nonpoint pollutants. Non-point pollutant treatment system.

Generally, sources of water pollutants can be classified into point sources and nonpoint sources. Point sources are continuously generated at a certain point such as domestic sewage, factory wastewater, and industrial wastewater. Non-point pollutants are pollutants that are discharged along with surface runoff during rainfall, while urban dust and trash, fertilizers and pesticides applied to farmland, soil erosion, barn spills, and atmospheric sediments It means the back, and spills from a large area.

These nonpoint pollutants are difficult to artificially control because they have a large seasonal variation in emissions, are difficult to predict and quantify, and are affected by weather conditions, terrain, and geology.

In addition, the impact of nonpoint source on water quality is increasing day by day due to development projects. In the area around Paldangho, it is located near the metropolitan area. In this case, non-point source sources account for 44.5% of Paldang source pollutant load in terms of BOD (biological oxygen demand).

In pollutant management and reduction, many pollutants have been reduced due to the development of treatment methods and construction of new sewage and wastewater treatment plants.However, methods and equipment for non-point pollutants are still insufficient. It is a reality that it is difficult to further improve water quality only by treatment-oriented water quality policy.In addition, due to the increase of impermeability rate in the region, urban runoff characteristics change due to urbanization. Since it is a cause of water quality deterioration, active management of stormwater runoff is needed to improve the quality of rivers and lakes caused by nonpoint sources.

In general, the management method of the non-point source is divided into the physical method of installing and managing various treatment facilities and structures, and the method of applying non-physical techniques such as land use regulation. Infiltration type, which requires a lot of maintenance, and storage type such as artificial wetland, reservoir pond, etc., which require a relatively large area, and vegetation type such as vegetation filtration and vegetation channel, and sewage treatment type such as ultrafast flocculation and sedimentation facilities. In Korea, where the capacity of nonpoint source control is relatively high, but the cost is high and the required area for installation of treatment facilities is a major limiting factor in the selection of treatment facilities, there are difficulties in accommodating land with large facility installation area. In the latter case, the cost is low but the efficiency is low and the complaints are high.

In addition, once non-point pollutants enter the surface or groundwater, it is difficult to manage them.Non-point pollutant treatment increases the processing cost and becomes more difficult as it is farther away from the pollutant. It is preferable to apply, but the conventional non-point pollutant treatment has a problem in cost and efficiency in the manner of collecting and treating contaminants at the end of the drain pipe.

The present invention has been made in order to solve the above problems, by using a filtration through the soil and biological treatment method by plants and microorganisms at the same time to efficiently discharge the non-point pollutant spilled during rainfall, the existing rain pipe end It is possible to prevent the pollution of public waters and groundwater due to nonpoint pollutants by managing the entire watershed evenly through the pollutant source management system that installs pollutant treatment system near pollutant sources such as impervious areas, etc. To provide a non-point pollutant treatment system.

Another object of the present invention is to provide a non-point pollutant treatment system that can be installed in a narrow space, a non-powered, unmanned system with a simple configuration, reduced manufacturing and installation costs, and efficient maintenance.

Still another object of the present invention is to provide a function to control the flow rate by temporarily storing a certain amount of effluent in the concrete box during the treatment of contaminants and then infiltrating it underground, while the natural friendly non-point pollutant treatment system due to planting. To provide.

In order to achieve the above object, the present invention provides a concrete box having an inlet of the upper side and the cover is open so that the plant is planted and the fender net can be installed so that the outflow water flows through the external inclined surface; ; A first perforated drainage pipe collecting the effluent treated in the hollow part of the concrete box and transferring it to the public water; Inlet when second outflow drainage pipe and outflow water buried in both sides of the bottom of the concrete box so that the outflow water not transported through the first outflow drain pipe are exposed to both sides of the bottom of the concrete box. Or a bypass pipe installed in the hollow part of the concrete box to prevent the outflow of the outflow water to the upper surface of the concrete box, and formed to protrude above the surface of the soil media layer to transfer the outflow water to the public water. A non-point pollutant treatment system is provided.

The non-point pollutant treatment system is filled in the concrete box and the soil filter media layer to prevent the loss of the soil filter media and the soil cover layer to prevent the loss of the soil filter media plant and planted in the soil filter media layer of the concrete box It may be further configured that the screen mesh is installed on the cover surface.

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention configured as described above are as follows.

1 is a perspective view of a non-point pollutant treatment system according to the present invention, FIG. 2 is a bottom perspective view of FIG. 1, FIG. 3 is a cutaway perspective view of a non-point pollutant treatment system before the soil media is filled, and FIG. 4 is a soil A cross-sectional plan view of a nonpoint pollutant treatment system before the filter media is filled.

1 to 4, the inlet 11 is formed in the upper side of the concrete box 10 of the non-point pollutant treatment system according to the present invention so that the effluent flows into the non-point pollutant treatment system, The inlet 11 may be formed on one side or a plurality of sides according to the surrounding environment in which the non-point pollutant treatment system is installed, the plant 70 is planted on the cover surface 12 of the concrete box and the wire mesh ( Openings are formed to allow 80 to be installed, and the outer shape of the concrete box 10 may be transformed into various shapes as well as a rectangular shape according to the installation environment.

In addition, in the hollow portion of the concrete box 10, the first air hole drainage pipe 20, which is a starting point for collecting the effluent through the pollutant treatment process, is discharged to the outside and finally transferred to the public water, and the rainfall The effluent is continuously introduced into the concrete box 10 above the processing capacity of the non-point pollutant treatment system so that the effluent flows back up to the inlet 11 to prevent water puddles around the non-point pollutant treatment system. The bypass pipe 40 is formed on the upper side of the first hole drain pipe 20, and the bypass pipe 40 is preferably provided with two or more for smooth drainage efficiency. The ends protrude above the surface of the soil media layer 50 and are connected in an 'L' shape.

The first hole drain pipe 20 and the bypass pipe 40 is preferably installed in communication with each other outside the concrete box 10, the number and type of holes in the cross-sectional shape of the first hole drain pipe 20 is It can be changed according to the installation environment of the invention, in the drawing, the outflow water was made in a rectangular shape so that it can effectively penetrate into the first hole drainage pipe 20, the first hole drainage pipe 20 in the concrete box 10 The number and shape of the installed and the number and shape of the bypass pipe 40 protruding above the soil media layer layer surface 50 is not limited to those shown in the drawings, considering the surrounding environment in which the present invention is installed and to increase the treatment efficiency. It can be variously modified.

In addition, the bottom surface of the concrete box 10 has a plurality of holes to expose the inner and outer both sides of the bottom surface of the concrete box 10 so that the effluent not transported through the first hole drain pipe 20 can penetrate into the basement The second hole drain pipe 30 is buried.

Meanwhile, the first and second oil hole drain pipes 20 and 30 and the bypass pipe 40 sufficiently withstand the heat generated during curing in the manufacturing process of the concrete box 10 and the pressure of the soil filled in the concrete box 10. It is preferable to select the material as possible.

5 is a cross-sectional side view of a non-point pollutant treatment system in which a soil filter layer is filled and plants are planted, as shown in FIG. 5, wherein the soil filter layer 50 is filled in the concrete box 10. It is preferable to select a mixture of topsoil, organic matter and sand, and to form pores sufficiently to grow microorganisms, and to install soil cover 60 on the surface of the soil media layer 50 to prevent loss of soil. do.

In addition, the plant 70 is planted in the soil filter bed layer 50, and the plant 70 to be planted uses a plant that can perform a purification function while adapting well to the environment of the region, and selects such a plant. The size of the system installation area of the present invention, the resistance to oil, insects, toxic substances, whether or not the mainland plants should be considered.

In addition, the opening of the cover surface 12 of the concrete box is provided with a mesh net 80 supported by the cover surface 12 of the concrete box, the mesh net 80 is a net structure for aeration of the plant roots Preferably, it is formed, and a constant storage space is formed between the soil cover (60) and the cover surface (12) of the concrete box, in which the rainfall runoff stays for a period of time and suspended solids and heavy metals such as garbage and contaminants Attached floating solids (SS) is to be settled, the suspended solids mesh 80 is installed so as to be opened and closed to be easily removed.

6 is a roadside installation state diagram of the non-point pollutant treatment system according to the present invention, as shown here, the concrete box 10 is buried underground, the inlet 11 and the plant 70 and the cover surface 12 to the outside Only the inlet 11 is exposed, and a predetermined inclined surface 13 is provided in the inlet 11 in the vicinity of the inlet 11 so that the outflow water may directly enter the concrete box 10 without bypassing another point.

In addition, the present invention is a non-point pollutant treatment system is installed on the side of the road in one embodiment, but a wide range of high concentrations such as organic matter, heavy metals, oil, etc. temporarily during rainfall, such as water collection facilities, residential areas or individual workplaces, small-scale complexes of highway bridges It can be installed in the impervious area where the non-point pollutant spills and needs to be cleaned up, and the size of the facility should be designed and installed flexibly according to the area and rainfall characteristics of the watershed.

Referring to the operation of the present non-point pollutant treatment system as follows.

Since the treatment system of the present invention is installed close to the source of pollutants such as an impermeable area and based on management at the source, rainfall runoff flows directly into the adjacent concrete box 10 without bypassing another place and resuspends the effluent pollutants. And overload in the treatment facility due to the bypass flow rate, and the non-point pollutants in the effluent introduced into the concrete box 10 are treated by the action of the soil media layer 50 and the plant 70 and treated. Effluent is discharged to public water through a number of pipes, looking at the action process in order;

First, suspended solids such as garbage and contaminants in the effluent are settled on the soil cover 60, non-point contaminants in the effluent are filtered through the soil filter bed 50, and volatile organic substances in the effluent are soil filter bed 50. In addition to being volatilized to the atmosphere as it passes through, some of the effluent penetrates into the soil particles themselves, thereby reducing the total amount of effluent discharged through the soil media layer 50, thereby reducing the amount of pollutants discharged into the public waters. .

Next, the plant 70 planted in the soil media layer 50 absorbs toxic substances such as metals from the roots and accumulates in the cells, and the stems and roots of the plant 70 are used as an attachment medium for the microorganisms. Maximizing the efficiency of decomposing and removing contaminants in the effluent, and by passing oxygen through the aeration tissue it is possible to increase the air gap in the soil media layer 50 to prevent clogging phenomenon.

In addition, the plant 70 promotes the decomposing action of the microorganisms to induce nitrification and denitrification, and through this process, harmful ammonium ions in the effluent are converted into nitrate ions, converted into nitrogen gas, and released into the atmosphere. In addition to the release of gas, such as water, carbon dioxide, and nitrogen, formed by assimilation, bacteria in microorganisms remove the toxicity of organic molecules and heavy metals, and accumulate and remove such substances in cells and cell membranes. Will purify.

As described above, the effluent treated by the action of the soil medium layer 50 and the plant 70 is collected into the first hole drainage pipe 20 through the hole of the first hole drainage pipe 20 to be transported to the public water, The treated effluent not penetrating into the first hole drainage pipe 20 is introduced into the existing soil under the concrete box 10 through the holes in the second hole drainage pipe 30 embedded in the bottom of the concrete box 10, and finally This can prevent groundwater contamination.

On the other hand, the outflow water flowed back from the soil in the concrete box 10 by flowing beyond the processing capacity of the non-point pollutant treatment system is projected bypass pipe on the storage space between the soil cover 60 and the concrete box cover surface 12 ( 40) is discharged to the public water through the bypass pipe (40) up to the end of the discharge, the discharge water discharged through the bypass pipe (40) occurs only if the rainfall lasts for a long time, the outflow of non-point pollutant Considering that the characteristics mainly show high pollution concentrations in the initial excellent effluent, the amount of non-point pollutants contained in the effluent discharged through the bypass pipe 40 is very small compared to the initial rainfall effluent so that the effluent is environmental Because of its low impact on the water, it can be released to public waters without any separate treatment.

Therefore, to summarize the system of the present invention by planting the plant 70 in the soil filter medium 50, the process of mixing pollutant removal through the microorganisms in the plant 70 and the soil with filtration action, the treated effluent pore Is introduced into the drain pipe 20 is discharged to the public water, where the treated water is not drained through the drain pipe (30) embedded in the bottom of the concrete box 10 through the process flowing into the existing soil purification Treatment and effluent flow regulation can be achieved simultaneously.

While specific preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and a person skilled in the art to which the present invention pertains has the technical gist of the present invention. Various changes can be made without departing.

As described above, the non-point pollutant treatment system of the present invention efficiently cleans the non-point pollutant spilled during rainfall by using filtration through soil and biological treatment by plants and microorganisms at the same time, Efficient management of the entire basin through the pollutant source management system that installs pollutant treatment system near pollutant sources such as impervious areas and prevents pollution of public water and groundwater due to nonpoint pollutants There is.

In addition, the present invention can be installed in a narrow space, the powerless and unmanned system with a simple configuration, the production and installation cost is reduced, the maintenance is efficient, and a certain amount of effluent during the treatment of pollutants is temporarily suspended It is also useful to provide a function to control the flow rate by storing in a box and penetrating underground, and providing a natural non-pollutant treatment system due to planting.

Claims (4)

It has an inlet 11 at the upper side which is open to allow the effluent to flow through the external inclined surface 13 and the cover surface 12 which is opened so that the plant 70 can be planted and the fender net 80 can be installed. A concrete box 10; Soil media layer 50 is filled in the concrete box 10 to be purified as the runoff passes; A first perforated drainage pipe 20 for collecting the effluent treated in the hollow part of the concrete box 10 and transferring it to the public water; A second perforated drainage pipe 30 which is embedded to expose the pores on both sides of the bottom surface of the concrete box 10 so that the outflow water that has not been transferred through the first perforated drainage pipe 20 can penetrate underground; In order to prevent the outflow of the outflow water to the inlet 11 or the concrete box cover surface 12 when the effluent flows in excess of the throughput of the non-point pollutant treatment structure, it is installed at the hollow part of the concrete box 10 and the end is Non-point pollutant treatment system, characterized in that consisting of a bypass pipe (40) formed to protrude above the surface of the soil filter media layer 50 to transfer the effluent to the public water. delete The method of claim 1, Non-point pollutant treatment system, characterized in that the soil cover (60) for preventing the loss of the soil medium layer (50) is further configured. The method according to claim 1 or 3, Non-point pollutant treatment system, characterized in that the plant 70 is planted in the soil filter media layer 50 and the cover mesh net 80 is installed on the cover surface 12 of the concrete box.

Images