KR101384490B1 - Auto storm treatment - Google Patents

Abstract

Rainwater treatment apparatus according to an embodiment of the present invention includes a storage tank having a first reservoir for storing the rainwater introduced through the inlet and a second reservoir for filtering the rainwater stored in the first storage tank first; A filter tank communicating with the storage tank and having a rainwater stored in the second storage tank, and having a filter part configured to filter the rainwater secondly by passing the rainwater flowing upwards; And a discharge tank communicating with the filtration tank and having the rainwater stored in the filtration tank and having an outlet for allowing the rainwater flowed out to the outside.

Description

Automatic Storm Water Treatment Unit {AUTO STORM TREATMENT}

The present invention relates to a stormwater treatment device, and more particularly, to a stormwater treatment device for efficiently treating contaminants such as foreign matters flowing into a river or the like contained in rainwater.

Rainwater drops to a state that contains various pollutants in the atmosphere, and as it flows through the surface of the water, it penetrates into rivers with various pollutants.

Specifically, the ground surface not only has the dust floating in the air, heavy metals contained in these dusts, and the like deposited therein, but also particulates contained in the exhaust gas according to the driving of the vehicle, tire wear products according to the driving of the vehicle, Environmental pollutants such as asphalt abrasives are also stacked together. These environmental pollutants contain heavy metals such as cadmium, eutrophic salts such as nitrogen and phosphorus, etc., which may have harmful effects on the human body.

In this way, various pollutants accumulated on the surface of the earth are discharged to the river through the drainage channel during rainfall. Although the overall pollutant concentration of runoff discharged to rivers with rainfall is low, but the total amount greatly exceeds point pollutants, there is a problem of treating road drainage from impermeable areas such as roads and parking lots for stable water quality conservation. .

That is, in order to remove various contaminants contained in rainwater, which is one of the nonpoint pollution sources, and to improve water quality of rivers, an apparatus for treating rainwater is necessary.

Recently, various stormwater treatment devices have been proposed and utilized for pretreatment of non-point pollutants derived from such ground surface. For example, pollutants contained in rainwater are installed at regular intervals between sideways or sidewalks between roadways and sidewalks. Is being applied to remove it.

Hanpyeong, the conventional storage system of rainwater treatment device is a certain amount of rainwater and foreign substances containing various contaminants, that is, earth and solids, etc. are precipitated, unlike the general rainwater, very large amount in a short time such as guerrilla heavy rain If rainwater is introduced, it will be introduced into the reservoir at a high speed.

As a result, foreign substances containing contaminants remaining at the bottom of the reservoir, such as soil or solids, may float in the reservoir due to rain falling at a high speed and finally flow into the river without being completely filtered. Is higher.

Therefore, even if a large amount of rainwater flows in a short time, it is urgent to study a rainwater treatment device that effectively filters contaminants and the like and improves treatment efficiency and easy maintenance and management.

It is an object of the present invention to efficiently remove various soils, soils and solids, etc., even when a large amount of rainwater flows unexpectedly in a short time, such as guerrilla heavy rains, and to simultaneously process general wastes. To provide.

Rainwater treatment apparatus according to an embodiment of the present invention includes a storage tank having a first reservoir for storing the rainwater introduced through the inlet and a second reservoir for filtering the rainwater stored in the first storage tank first; A filter tank communicating with the storage tank and having a rainwater stored in the second storage tank, and having a filter part configured to filter the rainwater secondly by passing the rainwater flowing upwards; And a discharge tank communicating with the filtration tank and having the rainwater stored in the filtration tank and having an outlet for allowing the rainwater flowed out to the outside.

The first reservoir and the second reservoir of the rainwater treatment apparatus according to an embodiment of the present invention may be partitioned by a removal net that is combined with the partition walls and the partition walls in the reservoir to filter the rainwater stored in the first reservoir. have.

The removal net of the rainwater treatment system according to an embodiment of the present invention may be disposed above the partition wall in the reservoir.

Rainwater treatment apparatus according to an embodiment of the present invention is stored in the lower filter portion and the auxiliary filter unit for filtering the rainwater not filtered by the filter unit to flow into the discharge tank;

The auxiliary filter unit of the stormwater treatment device according to an embodiment of the present invention may communicate the lower side of the filter unit and the lower side of the discharge tank.

Rainwater treatment apparatus according to an embodiment of the present invention may further include a pumping unit disposed in the inner space of the discharge tank to pump the rainwater that is stored in the discharge tank not discharged to the outlet.

Rainwater treatment apparatus according to an embodiment of the present invention may further include a sensor unit disposed in the interior space of the discharge tank to sense the amount of rain stored in the discharge tank to determine whether the pumping unit is operated.

The rainwater treatment device according to an embodiment of the present invention may further include a spraying unit disposed on the upper side of the filter unit in the filter tank to spray foreign matter collected in the filter unit to the bottom of the filter tank to inject treated water. Can be.

The filter unit of the stormwater treating apparatus according to an embodiment of the present invention may include at least one medium layer which is provided by being filled in a cartridge form.

The filter unit of the storm treatment apparatus according to an embodiment of the present invention may include a support plate having at least one through-hole formed so that the rainwater stored in the filter tank evenly passes through the at least one medium layer.

According to the rainwater treatment device according to the present invention, even when a large amount of rainwater flows unexpectedly in a short time such as guerrilla heavy rain, it is possible to efficiently remove soil, solids, and the like, including various pollutants.

In addition, general waste such as leaves, cigarette butts, etc. can be treated at the same time.

Furthermore, it is possible to conveniently perform the replacement or maintenance of the medium layer provided for removing the contaminants to facilitate maintenance management.

1 is a schematic cutaway perspective view showing a stormwater treatment device according to an embodiment of the present invention.
2 is a schematic plan view showing a stormwater treatment device according to an embodiment of the present invention.
3 is a schematic cross-sectional view showing a stormwater treatment apparatus according to an embodiment of the present invention, a schematic cross-sectional view taken along the line AA of FIG.
4 is a schematic cross-sectional view taken along line BB of FIG. 1.
5 is a schematic cross-sectional view taken along line CC of FIG. 1.
6 is a schematic cross-sectional view taken along the line DD of FIG. 1.
7 is a schematic cross-sectional view taken along line EE of FIG. 1.
8 is a schematic cross-sectional view taken along line FF of FIG. 1.
9 is a schematic perspective view showing a part of a filter unit provided in the storm water treatment apparatus according to the embodiment of the present invention.
10 is a schematic exploded perspective view of Y in FIG. 9.
FIG. 11 is a schematic perspective view showing a part of a modified filter part provided in the storm water treatment apparatus according to the embodiment of the present invention. FIG.
12 is a schematic cutaway perspective view of a stormwater treatment device according to another embodiment of the present invention.
13 is a schematic cross-sectional view showing a stormwater treatment device according to another embodiment of the present invention.
14 is a schematic cross-sectional view taken along the line GG of FIG. 13.
15 is a schematic cross-sectional view taken along the line HH of FIG. 13.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

1 is a schematic cutaway perspective view showing a stormwater treatment apparatus according to an embodiment of the present invention, Figure 2 is a schematic plan view showing a stormwater treatment apparatus according to an embodiment of the present invention, Figure 3 is one of the present invention It is a schematic sectional drawing which shows the stormwater processing apparatus which concerns on an Example, and is schematic sectional drawing along the AA line of FIG.

4 is a schematic cross sectional view taken along the line BB of FIG. 1, FIG. 5 is a schematic cross sectional view taken along the line CC of FIG. 1, and FIG. 6 is a schematic cross sectional view taken along the line DD of FIG. 1.

7 is a schematic cross sectional view taken along the line EE of FIG. 1, and FIG. 8 is a schematic cross sectional view taken along the line FF of FIG. 1.

1 to 8, the storm treatment apparatus 400 according to an embodiment of the present invention is a storage tank 100 into which rainwater (W) is first introduced and stored, and a filtration tank for filtering the rainwater (W) ( 200) and the discharge tank 300 to allow the rain (W) to flow to the outside.

Here, the term "excellent (W)" is to be understood that it includes all the water flowing from the drainage portion of the road, including rain water flowing from the road or the like during the rainfall.

The reservoir 100 may include at least one inlet 115 through which rainwater (W) may be introduced from the outside, and the inlet 115 may be formed at an upper side of the sidewall of the reservoir 110 to form an exterior and the reservoir. (100) can be communicated.

Therefore, rainwater (W) may be introduced into the reservoir 110 through the inlet 115, specifically, may be introduced into the first reservoir 110 of the reservoir 100.

When rain (W) is introduced into the first reservoir 110 through the inlet 115, the rain (W) is gradually filled from the lower side of the first reservoir 110 to the upper side by gravity, As a result, when the rainwater W is filled up to the height at which the removing net 140 is formed, the rainwater W flows into the second reservoir 120.

Here, the first reservoir 110 and the second reservoir 120 may be partitioned by the partition wall 130 having a predetermined height in the reservoir 100, the upper end of the partition 130 and the reservoir The removal net 140 may be formed between the upper side walls of the 100.

That is, the first reservoir 110 and the second reservoir 120 may constitute different spaces by the partition 130 and the removal net 140.

On the other hand, the removal network 140, when the rainwater (W) filled in the first reservoir 110 flows into the second reservoir 120, the foreign material, etc. can be filtered first, a large amount of rainwater Even when (W) flows into the first reservoir 110 in a short time and floats in the first reservoir 110, foreign matters and the like may be effectively filtered out.

In other words, when rainwater (W) is introduced from the outside into the first reservoir 110 through the inlet 115, foreign matters contained in the rainwater (W) is precipitated at the bottom of the first reservoir 110 and later Although it may be removed when cleaning the first reservoir 110 in the case, when a large amount of rain (W) in a short time flows stably there is a possibility of floating without being settled on the bottom of the first reservoir 110. do.

That is, such a phenomenon may occur in the case of a large amount of rainwater (W) that flows in a short time, such as guerrilla heavy rain, due to the large flow rate, flow rate, and drop width. This is affected, which causes these materials to float and flow with rainwater (W). This makes the purification of rainwater W more difficult and lowers the purification efficiency. As a result, rainwater W leaves the rainwater treatment device 400 with less purification treatment and flows into the river or the like.

However, the rainwater treatment device 400 according to an embodiment of the present invention filters the foreign matter injured by the removal network 140 to prevent the inflow into the second reservoir 120 in advance. Maximize the functionality.

In addition, the rainwater (W) flowing into the first storage tank 110 may also include general waste, such as leaves, cigarette butts, etc., by the removal network 140 can be treated at the same time, such as the foreign matter as the first. have.

Meanwhile, when cleaning the first reservoir 110, the first reservoir 110 may be artificially cleaned by entering a person through a reservoir manhole 117 formed in an upper wall of the first reservoir 110. .

However, the reservoir manhole 117 is not limited to being formed on the upper wall of the first reservoir 110, it should be noted that it may be formed on the upper wall of the second reservoir 120.

In addition, a pumping hole 119 may be formed in upper walls of the first reservoir 110 and the second reservoir 120 to allow the pumping device to be inserted from the outside, and the pumping hole 119 may be inserted into the pumping hole 119. The rainwater W stored in the first reservoir 110 and the second reservoir 120 may be discharged to the outside without being introduced into the filtration tank 200 by the device.

Therefore, when rainwater W is not introduced into the storage tank 100, the rainwater W stored in the storage tank 100 may be pumped to the outside through the pumping hole 119. It can improve the service life.

Filtration tank 200 is in communication with the storage tank 100, specifically, the second storage tank 120 may be rainwater (W) stored in the second storage tank 120 may be introduced, the rainwater (W) is introduced upward It may be provided with a filter unit 210 for passing the rain in the direction to filter the rain (W) secondary.

Here, the portion in which the second reservoir 120 and the filtration tank 200 communicate with each other may be implemented by at least one first communication hole 125 formed at a lower side thereof, and in the first communication hole 125. Rainwater (W) flowing into the second reservoir 120 may be immediately introduced into the filter tank (200).

Storm water (W) flowing into the filtration tank 200 is gradually filled from the bottom of the filtration tank 200 toward the upper side, when the amount of rainwater (W) is filled to the height of the filter unit 210 is formed in the storm water W passes through the filter unit 210.

Meanwhile, the filter unit 210 may include at least one medium layer 212 and a support plate 218, which will be described later with reference to FIGS. 9 to 12.

The rainwater (W) passing through the filter unit 210 may be filtered by the filter unit 210, consequently, at least one second communication hole formed in the side wall of the filter tank (200) 205 may be introduced into the discharge tank (300).

Here, a filter tank manhole 207 may be formed on an upper wall of the filter tank 200, and the filter tank manhole 207 may clean the inside of the filter tank 200 by an artificial method by allowing a person to enter from the outside. You can do that.

Meanwhile, an injection unit 220 may be installed on an upper wall of the filtration tank 200, and the injection unit 220 may inject water (X) or the like into the filter unit 210 to the filter unit 210. Can be cleaned.

That is, the filter unit 210 may collect foreign matters in the process of filtering the rainwater (W), and the function may be degraded by the foreign matters, but the water may be injected from the injection unit 220. The foreign substances collected in the filter unit 210 may be filtered to settle to the bottom of the filtration tank 200.

As such, foreign matters deposited on the bottom of the filtration tank 200 may be cleaned through the filtration tank manhole 207, thereby improving performance and lifespan of the filter unit 210.

The discharge tank 300 may be introduced into the rainwater (W) passing through the filter portion 210 of the filtration tank 200 through at least one second communication hole 205, the second communication hole 205 is It may be formed on the upper side of the side wall of the discharge tank (300).

Therefore, the rainwater W introduced through the second communication hole 205 is filled from the bottom of the discharge tank 300 to the upper side by gravity, and eventually, to the height of the discharge port 305. When discharged to the outside through the outlet 305.

On the other hand, at least one sub-filter unit 230 may be formed on the lower side walls of the filtration tank 200 and the discharge tank 300, the sub-filter unit 230 is stored in the filtration tank 200 (W) may be introduced into the discharge tank 300 through the auxiliary filter unit 230.

In other words, when the rainwater W stored in the filtration tank 200 is not filled to the height of the second communication hole 205, it cannot be introduced into the discharge tank 300 through the second communication hole 205. This is to allow the filter to flow into the discharge tank 300 at the same time through the auxiliary filter unit 230.

Here, the auxiliary filter unit 230 may be a filter having a filtration function equivalent to the filter unit 210.

In addition, a pumping part 310 may be installed in the inner space of the discharge tank 300 to pump the rainwater W that is not discharged to the discharge port 305 to the outside.

The pumping unit 310 may include a kind of motor, and the operation of the motor may be determined by at least one sensor unit 320 and the control unit 330 disposed in the inner space of the discharge tank 300. have.

In other words, the sensor unit 330 may sense the amount of storm water (W) filled in the discharge tank 300, the pumping unit 310 by comparing the amount of the storm water (W) with a predetermined value. To determine whether to drive the motor.

That is, when the amount of rainwater (W) filled in the discharge tank 300 is not filled to the height of the discharge port 305, the sensor unit 320 senses the amount of rainwater (W) pumping unit 310 Is transmitted to the control unit 330, and the control unit 330 applies the signal for driving the motor.

Therefore, the motor is driven, the rainwater (W) filled in the discharge tank 300 may be leaked to the outside by the driving force of the motor.

Here, the rainwater (W) may be discharged to the outside through the outlet pipe 315 installed in the discharge tank 300.

However, as shown in FIGS. 1 to 6, the outlet pipe 315 may be connected to each other with an injection unit 220 for injecting water (X) into the filtration tank 200, and thus the outlet pipe 315. Rainwater (W) stored in the discharge tank 300 introduced through the) may be injected into the filtration tank 200 through the injection unit 220.

Therefore, the filter unit 210 provided in the filtration tank 200 may be naturally cleaned by circulation of the rainwater W stored in the discharge tank 300 and the filtration tank 200.

However, the outlet pipe 315 may be formed separately from the injection unit 220, so that the rainwater (W) stored in the discharge tank 300 by the pumping unit 310, that is, the driving force of the motor It is obvious that it can be leaked to the outside.

On the other hand, the upper side wall of the discharge tank 300 may be formed in the discharge tank manhole 307, the discharge tank manhole 307 allows the person to enter from the outside of the discharge tank 300 in an artificial manner You can make the inside clean.

FIG. 9 is a schematic perspective view showing a part of a filter part provided in the storm water treatment apparatus according to an embodiment of the present invention, and FIG. 10 is a schematic exploded perspective view of Y in FIG. 9.

The filter unit 210 may be disposed in an inner space of the filtration tank 200 to secondaryly filter rainwater W introduced from the second reservoir 120 into the filtration tank 200, and at least one medium layer. 212 and support plate 218.

The media layers 212 may be provided to remove contaminants contained in the rainwater (W) by filtration or adsorption, and may be composed of a plurality of layers.

Here, the plurality of media layers 212 may be provided in a form filled in the cartridge, respectively, thereby facilitating the installation, removal, exchange, maintenance and the like of the media layer 212.

Specifically, the medium layer 212 consists of a plurality, preferably four layers, each of which may be filled in each of the circular cartridges 214.

Meanwhile, according to the present invention, each of the cartridges 214 may have fastening protrusions 214a and fastening grooves 214b formed at both ends of each of the cartridges 214 to facilitate coupling and disassembly of each other. When the fastening protrusion 214a formed at the lower end of the fastening groove 214b formed at the upper end of the lower cartridge 214 is rotated, it is fastened mutually.

When the cartridge 214 is replaced, when the cartridge 214 is rotated in the opposite direction to the fastening direction, the fastening can be rotated to separate the cartridges 214 and to refill the cartridge 214 with a desired medium.

On the other hand, the medium filled in each cartridge 214 may flow out during the purification process. To prevent this, a medium leakage preventing member 215 having a mesh of a predetermined size may be provided and fixed on the seating portion 214c at the top of each cartridge 214.

The medium leakage preventing member 215 is fixedly mounted to the seating portion 214c of each cartridge 214 to prevent the medium filled in the cartridge 214 from flowing out of the cartridge together with the rainwater W. FIG.

Here, the medium layer 212 may be composed of an eco concrete, a gravel layer, a sand layer and an anthracite from each lower layer, or may be composed of an eco concrete, sand, vermiculite, and anthracite.

In addition, it may be composed of eco-concrete, sand-filled fiber, vermiculite-filled fiber, anthracite-filled fiber.

Here, the anthracite is a filter for physical treatment used to improve water quality in purified water and wastewater, and the filter unit 210 according to the present invention by the anthracite improves the water quality and improves the treatment speed. The yield can be increased and its hardness is low, so the wear loss of the particles is small and the durability by water pressure is large, so that the filtration rate can be prevented from being used for a long time.

In addition, the anthracite has a low specific gravity, so the amount of backwashing is low, the time may be short, and the backwashing may be well performed.

In addition, the suspended solids, as well as the ability to remove the turbidity, colloidal material, and can also function as a microbial carrier.

On the other hand, a support plate 218 for supporting the medium layer 212 and distributing the incoming rainwater (W) more evenly to the medium layer 212 may be coupled to the lower side of the medium layer 212. have.

The support plate 218 has a plurality of through-holes 218a formed in a uniform shape, so that the rainwater W can move through the support plate 218 to the medium layer 212 and the medium layer. (212) Evenly distributed and supplied to the whole, such that even if a large amount of rainwater (W) flows during heavy rain, the rainwater (W) flows more smoothly, and is included in the rainwater (W). It helps to remove the contaminated substances more efficiently.

The through hole 218a has a structure in which the cartridge 214 of the medium layer 212 can be more easily sealed to the support plate 218.

That is, a coupling groove 218b for fastening with the cartridge 212 may be formed in the through hole 218a of the upper surface of the support plate 218 facing the medium layer 212, and the coupling between the cartridges 214 may be performed. Likewise, when the medium layer 212 is installed on the support plate 218, the coupling groove 218b of the through hole 218a passes through the fastening protrusion 214a formed in the cartridge 214 at the bottom of the medium layer 212. When inserted into and rotated, the cartridge 214 may be stably fastened to the support plate 218.

11 is a schematic cutaway perspective view showing a portion of a modified filter part provided in the stormwater treatment apparatus according to the embodiment of the present invention.

Referring to FIG. 11, the modified filter unit 210 ′ provided to the storm water treatment apparatus according to the exemplary embodiment of the present invention may be compared with the filter unit 210 described with reference to FIGS. 9 and 10. Note that the composition and effect are the same except for the number of media layers filled in).

The filter unit 201 ′ may include a plurality of medium layers 212 ′ and a support plate 218 ′.

Here, one of the plurality of medium layers 212 'may be provided in a form filled in a circular cartridge 214', and the other medium layers 212 'are laminated from one side of the support plate 218'. Can be charged.

That is, the medium layers 212 'which are not filled in the cartridge 214' may be sequentially stacked with a constant height in the inner space of the filtration tank 200.

Meanwhile, the medium layers 212 ′ may each be composed of an eco concrete, a gravel layer, a sand layer, and an anthracite from a lower layer, or may be composed of an eco concrete, sand, vermiculite, and anthracite.

In addition, it may be composed of eco-concrete, sand-filled fiber, vermiculite-filled fiber, anthracite-filled fiber.

Thus, the medium filled in the circular cartridge 214 'may be ecoconcrete.

12 is a schematic cutaway perspective view showing a stormwater treatment device according to another embodiment of the present invention, Figure 13 is a schematic cross-sectional view showing a stormwater treatment device according to another embodiment of the present invention, Figure 14 is FIG. Is a schematic cross sectional view taken along the line GG of FIG. 15, and FIG. 15 is a schematic cross sectional view taken along the line HH of FIG.

12 to 15, the stormwater treatment apparatus 400 ′ according to another exemplary embodiment of the present invention may include FIGS. 1 to 3 except for the first communication hole 125 ′ and the second communication hole 205 ′. Since the configuration and effects are the same as those of the stormwater treatment apparatus 400 according to the embodiment described with reference to FIG. 8, descriptions other than the first communication hole 125 ′ and the second communication hole 205 ′ will be described. It will be omitted.

In addition, although the filter unit 210 'illustrated in FIGS. 12 and 13 shows the filter unit 210' illustrated in FIG. 11, the filter unit 210 'illustrated in FIG. 11 is not limited thereto, and the filter unit 210 illustrated in FIGS. Note that it is applicable.

Filtration tank 200 ′ communicates with the reservoir 100 ′, specifically, the second reservoir 120 ′ and flows into the second reservoir 120 ′ from the first reservoir 110 ′ and stored therein. May be introduced, and may be provided with a filter unit 210 'for filtering the rainwater (W) in the secondary by passing the rainwater (W) in the downward direction.

Here, the portion where the second reservoir 120 'and the filtration tank 200' communicate with each other may be implemented by at least one first communication hole 125 'formed at an upper side thereof, and the second reservoir 120 Rainwater (W) flowing into ') is filled to the bottom and then filled to the height of the first communication hole (125') is introduced into the filtration tank 200 'through the first communication hole (125').

On the other hand, the rainwater (W) that has passed through the filter unit 210 'can be contaminated by the filter unit 210' and the like, after all, at least formed on the lower side of the side wall of the filter tank 200 ' It may be introduced into the discharge tank 300 'through one second communication hole (205').

Therefore, the rainwater W passing through the filter portion 210 'may immediately pass through the second communication hole 205' and flow into the discharge tank 300 ', and the rainwater rainwater W may be introduced into gravity. By the bottom of the discharge tank (300 ') is filled from the bottom toward the top, and eventually, when filled up to the height of the discharge port (305') is discharged to the outside through the discharge port (305 ').

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that such modifications or variations are within the scope of the appended claims.

100, 100 ': reservoir 110, 110': first reservoir
120, 120 ': second reservoir 130: bulkhead
140: removal network 200, 200 ': filtration tank
210, 210 ': filter part 300, 300': discharge tank

Claims (10)

A reservoir having a first reservoir for storing rainwater introduced through an inlet and a second reservoir for filtering and storing the rainwater stored in the first reservoir primarily;
A filter tank communicating with the reservoir and having a rainwater stored in the second reservoir, and having a filter part spaced apart from a bottom surface so as to pass the rainwater upward and to filter the rainwater secondly;
A discharge tank communicating with the filtration tank and having a rainwater stored in the filtration tank and having an outlet for allowing the rainwater to flow out; And
When the rainwater introduced from the second reservoir into the filtration tank is not filled to the position of the filter part and thus cannot be filtered by the filter part, the filter part communicates between the filter part and the bottom surface and the discharge tank. And an auxiliary filter unit for filtering the rainwater that cannot be filtered to flow into the discharge tank.
The method of claim 1,
And the first and second reservoirs are partitioned by a removal network coupled to the partition walls and the partition walls in the reservoir to filter the rainwater stored in the first reservoir.
3. The method of claim 2,
The removal net is disposed on the upper side of the partition wall in the reservoir.
delete delete The method of claim 1,
And a pumping unit disposed in the inner space of the discharge tank to pump rainwater that is not discharged to the outlet while remaining in the discharge tank.
The method according to claim 6,
And a sensor unit disposed in an inner space of the discharge tank and configured to sense an amount of rain stored in the discharge tank to determine whether the pumping unit is operated.
The method of claim 1,
And a spraying unit disposed above the filter unit in the filtration tank and spraying the treated water so as to deposit the foreign matter collected in the filter unit to the bottom of the filtration tank.
The method of claim 1,
And the filter unit comprises at least one medium layer filled and provided in a cartridge form.
10. The method of claim 9,
And the filter unit comprises a support plate on which at least one through hole is formed so that the rainwater stored in the filtration tank passes the at least one medium layer evenly.

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