[go: nahoru, domu]

KR20100122373A - Storm water treatment apparatus - Google Patents

Storm water treatment apparatus Download PDF

Info

Publication number
KR20100122373A
KR20100122373A KR1020090041377A KR20090041377A KR20100122373A KR 20100122373 A KR20100122373 A KR 20100122373A KR 1020090041377 A KR1020090041377 A KR 1020090041377A KR 20090041377 A KR20090041377 A KR 20090041377A KR 20100122373 A KR20100122373 A KR 20100122373A
Authority
KR
South Korea
Prior art keywords
rainwater
treatment tank
screen
inlet
filter
Prior art date
Application number
KR1020090041377A
Other languages
Korean (ko)
Inventor
이장수
Original Assignee
(주)워터 아이엠에스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)워터 아이엠에스 filed Critical (주)워터 아이엠에스
Priority to KR1020090041377A priority Critical patent/KR20100122373A/en
Publication of KR20100122373A publication Critical patent/KR20100122373A/en

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D35/00Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/101Dedicated additional structures, interposed or parallel to the sewer system
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/105Accessories, e.g. flow regulators or cleaning devices
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/14Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
    • E03F5/16Devices for separating oil, water or grease from sewage in drains leading to the main sewer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2221/00Applications of separation devices
    • B01D2221/12Separation devices for treating rain or storm water

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sewage (AREA)

Abstract

The present invention provides an initial excellent treatment apparatus capable of preventing clogging of a treatment apparatus by separating and treating contaminants, sedimentary substances, oils, greases and suspended solids in the initial excellent effluent containing high concentration of pollutants in roads and industrial complexes. To provide.

The main configuration of the present invention is to receive the rainwater from the end of the rain pipe, the first treatment tank for collecting the solid contained in the initial excellent water by rotation action and gravity, and the rainwater treated from the first treatment tank is treated with contaminants by filter And an intermediate connecting pipe for providing the rainwater treated in the first treatment tank to the second treatment tank, wherein the first treatment tank is an enclosure having an upper opening and having a first inlet and a first outlet on the side wall, respectively. The first body, the circular vortex forming part which is located inside the first body and forms the vortex in the rainwater introduced into the inside, extends perpendicularly to one side of the vortex forming part, and discharges water while filtering the impurities contained in the rainwater. Cylindrical screen consisting of a through-hole and an inlet groove formed on one side of the vortex forming unit, and the inlet of the first body and the inlet of the cylindrical screen are connected to the inlet groove of the cylindrical screen. And a first connecting pipe flowing into the screen, wherein the second treatment tank is a housing having an upper opening, a second body having a second inlet and a second outlet coupled to a side wall, and positioned inside the second body. It characterized in that it comprises a filter-type screen to remove the foreign matter passing through the rainwater flowing into the second inlet.

Description

Initial excellent treatment device {STORM WATER TREATMENT APPARATUS}

The present invention provides an initial excellent treatment apparatus capable of preventing clogging of a treatment apparatus by separating and treating contaminants, sedimentary substances, oils, greases and suspended solids in the initial excellent effluent containing high concentration of pollutants in roads and industrial complexes. To provide.

In particular, the present invention is the initial contaminants and sediment contained in the initial excellent effluent flows into the interior of the cylindrical screen, and the remaining contaminants are treated with a filter screen to initially treat the solids and contaminants at the same time To provide a stormwater treatment device.

In general, the sewage discharge method can be largely divided into a confluence type, a classification type and a partial classification type, and a combined discharge method is mainly used in Korea.

The combined discharge method refers to a method in which rainwater flows into sewage pipes during rain and discharges along with the sewage.In rain, rainwater discharges to sewage treatment plants through rainwater segregators installed in sewage pipes, When a large amount is inflowed, a certain amount of sewage and rainwater are discharged to the sewage treatment plant, and the rest is discharged to the stream, lake or ocean directly by overflowing the rainwater soil.

As such, the outflow water flowing out of stormwater is called Combined Sewer Overflows (CSOs) (hereinafter referred to as 'Walkwater'). Since a large amount of these are contained, which can cause pollution such as rivers, lakes or the sea, their control is inevitably emerging.

According to the prior art related to the present invention Patent No. 10-0649180 "initial excellent (non-point source) and sewage pipe overflow water treatment device using the slope plate precipitation" (notice date: November 24, 2006), the upper and lower opening A baffle drum (2) connected in a tangential direction to the inflow pipe (3) communicating with a conduit on one side in a cylindrical tube shape, and a cylindrical screen (4) having a lattice structure and extending to a lower portion of the baffle drum (2); , An inclined plate portion 5 formed by stacking a plurality of inclined plates having an inclination angle so as to surround the outside of the screen 4 and allowing the precipitated solids to naturally flow downward, and a manhole cover on the upper portion having a cylindrical shape with an open upper portion. The outlet pipe 7 is connected to one side and has a size that can include the baffle drum 2, the screen 4 and the inclined plate portion 5 therein, the lower side of the inclined plate portion 5 Main body outer wall (6) And a sediment storage tank (8) formed to extend below the main body outer wall (6) and communicating with the screen (4) and having a sediment bucket (9) detachable therein. 1) is disclosed.

However, in the conventional early rainwater and sewage overflow water treatment system, the contaminants contained in the overflow water introduced into the baffle drum are attached to the wall surface of the screen so that the contaminants do not fall off naturally even when the water level in the treatment device is lowered. Accordingly, there is a problem that the through-holes of the screen are blocked so that the performance of the screen cannot be properly exhibited, and thus the cleaning should be periodically performed.

In addition, in order to remove the impurities accumulated in the sediment bucket, there was an inconvenience in that the manhole cover was opened to lift the bucket or sucked into the waste disposal vehicle to remove it.

An object of the present invention is to treat the contaminants, sediment, oil, grease and suspended solids in the initial excellent effluent containing high concentrations of pollutants in roads and industrial complexes, and to prevent the blockage of the treatment device. To provide a device.

Another object of the present invention is to treat the contaminants and sediment contained in the initial excellent effluent flow into the cylindrical screen, and the remaining contaminants can be treated with a filter screen to treat solids and contaminants at the same time. An early excellent treatment device is provided.

The initial excellent treatment apparatus according to the present invention receives the rainwater from the rainwater pipe end and receives the rainwater from the first treatment tank and the rainwater treated from the first treatment tank to collect the solids contained in the initial rainwater by the rotational action and included in the rainwater. A second treatment tank for treating the contaminated material with a filter and an intermediate connecting pipe for providing rainwater treated in the first treatment tank to the second treatment tank,

The first treatment tank is a housing having an upper opening, a first body having a first inlet and a first outlet formed on a side wall, and a circular vortex forming unit which forms a vortex in the rainwater introduced into the first body. A cylindrical screen including a through-hole extending vertically to one side of the vortex forming unit and discharging water while filtering the impurities contained in the rainwater, an inlet groove formed on one side of the vortex forming unit, and an inlet and a cylindrical screen of the first body. It is connected to the inlet groove and includes a first connecting pipe for introducing the rainwater in the end of the rain pipe to the inside of the cylindrical screen,

The second treatment tank is a housing having an upper opening, and a second body having a second inlet and a second outlet coupled to a sidewall, and a rainwater flowing into the second inlet through the second body, thereby removing foreign substances. It characterized in that it comprises a filter screen.

Preferably, the cylindrical screen is characterized in that the vortex forming portion and the through hole are formed alternately with each other and formed in a plurality of longitudinal cylindrical shape.

Preferably, the bottom surface of the first body is formed with a cylindrical first support, characterized in that the cylindrical screen is installed on the first support.

Preferably, the first support portion is characterized in that formed in a position spaced at a certain height from the bottom of the first body.

Preferably, the cylindrical screen is characterized in that the trappings are further formed on the inner bottom.

Preferably, the inner upper portion of the cylindrical screen is characterized in that the oil removal portion is further formed.

Preferably, the filter-type screen is connected to the filter support formed in a cylindrical shape, the filter inserted into the filter support, the discharge groove and the discharge groove formed on one side of the filter support portion to the second outlet of the second body to the inside of the filter support. Characterized in that the second connection pipe for discharging the sewage to the second outlet of the second body.

Preferably, the bottom of the second body is formed with a cylindrical second support formed, characterized in that the filter screen is installed on the second support.

Preferably, the filter support is characterized in that formed with a plurality of support grooves to replace the filters.

The initial rainwater treatment apparatus having the contaminant manure cylindrical screen of the present invention can filter the contaminants contained in them while minimizing the influence on the initial rainwater, the overflow water or the sewage flow, and the water can be discharged to the outside. .

In addition, the present invention has the advantage that it is possible to prevent the water discharge portion of the screen to be blocked by placing the contaminants to be filtered to the cylindrical screen in the inner center of the screen.

In addition, since the cylindrical screen can be detachably installed, there is no need for a separate device for cleaning, and accordingly, there is an advantage in that the effort and cost for maintenance of the initial excellent treatment device and the like can be reduced.

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

Figure 2a is a cross-sectional view of the initial excellent treatment apparatus according to the present invention, Figure 2b is a plan view of the initial excellent treatment apparatus according to the present invention, Figure 3 is a cross-sectional view of the first treatment tank according to an embodiment of the present invention, Figure 4 5 is a perspective view of a cylindrical screen provided in a first treatment tank according to the present invention, FIG. 5 is a state diagram of FIG. 4, FIG. 6 is a cross-sectional view of a first treatment tank according to another embodiment of the present invention, and FIG. Is a cross-sectional view of a second treatment tank according to the present invention, and FIG. 8 is a cross-sectional view of a filter-type screen according to the present invention.

As shown in Figure 2a and 2b, the initial excellent treatment device is a first treatment tank 100 for receiving the rainwater from the rainwater pipe end and collecting the solid matter contained in the initial rainwater by the rotation action and gravity, and the first treatment tank Provided to the second treatment tank 200, the second treatment tank 200 and the first treatment tank 100 to treat the contaminants contained in the rainwater with a filter received from the treated rainwater (100). It is provided with an intermediate connecting pipe (300).

As shown in FIGS. 3 and 4, the first treatment tank 100 includes a first body 110 having an upper opening and a first inlet 111 and a first outlet 112 formed on a side wall thereof; Located in the interior of the first body 110 and the circular vortex forming unit 121 to form a vortex in the rainwater introduced into the inside, and extends perpendicular to one side of the vortex forming unit 121 and the contaminants contained in the rainwater Cylindrical screen 120 consisting of a through hole 122 for filtering and discharging water, an inlet groove 123 formed at one side of the vortex forming unit, and a first inlet 111 of the first body and an inlet groove of the cylindrical screen ( It is connected to 123 is made of a first connecting pipe 130 for introducing the rainwater in the end of the rain pipe to the inside of the cylindrical screen 120. At this time, it is preferable that the cylindrical first supporting portion 113 is formed on the bottom of the first body 110, and the cylindrical screen 120 is installed on the upper portion of the first supporting portion 113.

On the other hand, the cylindrical screen 120, the vortex forming portion 121 and the through-hole 122 are alternately formed to form a plurality of vertical cylindrical shape of the corrugation, each corrugation may be formed to be inclined so as to face in one direction. At this time, the cylindrical screen 120 may be installed on the top and bottom rim 124 to maintain a cylindrical shape. In addition, the size of the through hole 122 is made differently in consideration of the size of the contaminants to be blocked.

In addition, the cylindrical screen 120 has a handle 125 is further formed to be easily moved to the outside from the first body 110, the oil removal portion 126 and the inner bottom to filter the oil component on the inner upper portion of the vortex forming portion Located in and may further form a contaminant collecting unit 127. Accordingly, the rainwater introduced into the cylindrical screen 120 is formed in the vortex by the vortex forming unit 121, so that the oil component floats on the upper portion of the rainwater when the sewage is filled, so the oil-cold matter oil removal unit 126 Since it is filtered by the remaining remains without being discharged, and the contaminants accommodated therein is introduced into the central trap collecting portion 127 is collected.

On the other hand, as shown in Figure 5, the outlet of the first connecting pipe 130 is more preferably extended to the inside of the cylindrical screen 120 is installed close to the vortex forming portion 121. That is, the rainwater introduced into the cylindrical screen 120 by the first connecting pipe 130 installed close to the vortex forming unit 121 flows along the circular vortex forming unit 121 and naturally forms a vortex. . And, the contaminants included in the vortex are collected in the contaminant collecting unit 127 in the center of the cylindrical screen 120. Then, the sewage filled into the inside of the cylindrical screen is discharged to the outside of the screen through the through hole 122 and eventually discharged along the first outlet 112 of the body.

On the other hand, as shown in Figure 6, when the first support portion 113 of the first body 110 is formed as a circular locking jaw 114 in a position spaced at a certain height from the bottom of the first body cylindrical screen 120 may be supported. In addition, when the contaminant collecting part 127 of the cylindrical screen 120 is extended to the lower portion of the locking projection 114, a larger amount of contaminant may be collected.

By the first treatment tank 100, gross pollutants, sediment, oil & grease, and suspended solids (SS) contained in the initial excellent effluent containing high concentration of pollutants in roads and industrial complexes are screened. The solids settle to the internal bottom conglomerate collection due to the vortex action and gravity, or are located in the middle rainwater to discharge the rainwater that has been removed.

As shown in FIG. 7, the second treatment tank 200 according to the present invention has a second body 210 having an upper opening and a second inlet 211 and a second outlet 212 coupled to a side wall. Wow; Located inside the second body and made of a filter-type screen 220 to remove the foreign matter passing through the rainwater flowing into the second inlet 211.

As shown in FIG. 8, the filter screen 220 includes a filter support part 221 formed in a cylindrical shape, a filter 222 inserted into the filter support part 221, and a discharge groove 223 formed at one side of the filter support part. And a second connection pipe 230 connected from the discharge groove 223 to the second outlet 212 of the second body to discharge the sewage inside the filter support 221 to the second outlet 212 of the second body. It is preferably made of. At this time, it is preferable that the cylindrical second supporting portion 213 is formed on the bottom of the second body, and the filter screen 220 is installed on the second supporting portion 213.

The filter support part 221 is formed of a plurality of support grooves 224 so that the filters can be easily replaced, and a plurality of filters are used in a box shape in sizes corresponding to the support grooves. In addition, the upper portion of the filter screen may further include a second handle 213 to easily move from the second body 210 to the outside. In this case, a filter medium such as pearlite, zeolite, vermiculite, activated carbon, etc. is used in the filter, and the filter medium may be selected and used according to non-point source spillage characteristics.

Such a filter screen can efficiently remove particulate matter, organic matter, heavy metals and fats and oils contained in rainwater. In addition, when the filter-type screen is formed into a cylindrical shape, the rainwater flowing into the second treatment tank forms a vortex and flows, thereby reducing contaminants attached to the filter and increasing the filtration area.

On the other hand, in the second treatment tank according to another embodiment of the present invention, the filter type screen is formed to cross between the second inlet 211 and the second outlet 212 of the second body and is supplied to the second inlet 211. The rainwater may be treated to separate the second treatment tank into two parts by the second outlet 212.

It is to be understood that the present invention is not limited to the above-described preferred embodiments, but can be practiced in various ways without departing from the spirit of the present invention in various ways. If you can easily understand. If the implementation by such improvement, change, substitution or addition falls within the scope of the appended claims below, the technical spirit is also regarded as belonging to the present invention.

1 is an exploded perspective view showing an example of a conventional foreign matter filtering device for receiving.

Figure 2a is a cross-sectional view of the initial excellent treatment apparatus according to the present invention.

Figure 2b is a plan view of the initial excellent treatment apparatus according to the present invention.

3 is a cross-sectional view of the first treatment tank according to an embodiment of the present invention.

4 is a perspective view of a cylindrical screen provided in the first treatment tank according to the present invention.

5 is a state diagram used in FIG.

6 is a sectional view of a first treatment tank according to another embodiment of the present invention.

7 is a sectional view of a second treatment tank according to the present invention.

8 is a cross-sectional view of a filter screen according to the invention.

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

100: first treatment tank 110: first body

120: cylindrical screen 130: first connector

200: second treatment tank 210: second body

220: filter type screen 230: second connector

300: intermediate connector

Claims (9)

A first treatment tank that receives rainwater from the end of the rainwater pipe and collects the solids contained in the initial rainwater by rotation and gravity; And an intermediate connecting pipe for providing rainwater treated in the second treatment tank and the first treatment tank to the second treatment tank. The first treatment tank includes a first body having an upper opening and having a first inlet and a first outlet on a side wall thereof; Located inside the first body and extending vertically to one side of the circular vortex forming portion and the vortex forming portion to form a vortex in the rainwater introduced into the through hole and vortex forming to discharge water while filtering the impurities contained in the rainwater Cylindrical screen consisting of the inlet groove formed on one side of the portion; And a first connecting pipe connected to an inlet of the first body and an inlet groove of the cylindrical screen to introduce a rainwater pipe into the inside of the cylindrical screen. The second treatment tank includes a second body in which an upper opening is opened and a second inlet and a second outlet are coupled to sidewalls; The initial excellent treatment device, characterized in that it comprises a filter-type screen located in the second body and the rainwater flowing into the second inlet passes to remove the foreign matter. According to claim 1, The cylindrical screen is excellent initial treatment device, characterized in that the vortex forming portion and the through-hole alternately formed with a plurality of vertically corrugated cylindrical. The initial excellent treatment apparatus according to claim 1, wherein a cylindrical first support part is formed on a bottom of the first body, and a cylindrical screen is installed on the first support part. The initial excellent treatment apparatus according to claim 1, wherein the first support part is formed at a position spaced apart from the bottom of the first body at a predetermined height. According to claim 1, The cylindrical screen is excellent initial treatment device, characterized in that the dust collecting portion is further formed on the inner bottom. According to claim 1, The initial excellent treatment apparatus, characterized in that the oil removal portion is further formed on the inner upper portion of the cylindrical screen. The filter screen of claim 1, wherein the filter-type screen is connected to a filter support formed in a cylindrical shape, a filter inserted into the filter support, and a discharge groove and a discharge groove formed at one side of the filter support to a second outlet of the second body. Initial excellent treatment device, characterized in that consisting of a second connecting pipe for discharging the sewage inside the support to the second outlet of the second body. The initial excellent treatment apparatus according to claim 1, wherein a cylindrical second support part is formed on a bottom of the second body, and a filter screen is installed on the second support part. The initial excellent treatment apparatus according to claim 7, wherein the filter support part is formed of a plurality of support grooves so as to replace the filters.
KR1020090041377A 2009-05-12 2009-05-12 Storm water treatment apparatus KR20100122373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090041377A KR20100122373A (en) 2009-05-12 2009-05-12 Storm water treatment apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090041377A KR20100122373A (en) 2009-05-12 2009-05-12 Storm water treatment apparatus

Publications (1)

Publication Number Publication Date
KR20100122373A true KR20100122373A (en) 2010-11-22

Family

ID=43407330

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090041377A KR20100122373A (en) 2009-05-12 2009-05-12 Storm water treatment apparatus

Country Status (1)

Country Link
KR (1) KR20100122373A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101253329B1 (en) * 2012-06-26 2013-04-10 씨앤씨주식회사 Structure for treating rainwater
KR101270468B1 (en) * 2011-06-20 2013-06-04 이경섭 Contaminant purification apparatus of non-point sourcesby the early-stage storm runoff
KR101275723B1 (en) * 2012-08-01 2013-06-17 (주)워터 아이엠에스 Vortex formation device and first flush stormwater treatment apparatus using it
KR101313042B1 (en) * 2013-04-22 2013-09-30 대구광역시 환경시설공단 Device for inflow of rainwater and separating of earth and sand
KR102506423B1 (en) * 2022-02-18 2023-03-06 주식회사 서안그린텍 Nonpoint Pollutants Treatment Facility with a cogwheel screen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101270468B1 (en) * 2011-06-20 2013-06-04 이경섭 Contaminant purification apparatus of non-point sourcesby the early-stage storm runoff
KR101253329B1 (en) * 2012-06-26 2013-04-10 씨앤씨주식회사 Structure for treating rainwater
KR101275723B1 (en) * 2012-08-01 2013-06-17 (주)워터 아이엠에스 Vortex formation device and first flush stormwater treatment apparatus using it
KR101313042B1 (en) * 2013-04-22 2013-09-30 대구광역시 환경시설공단 Device for inflow of rainwater and separating of earth and sand
KR102506423B1 (en) * 2022-02-18 2023-03-06 주식회사 서안그린텍 Nonpoint Pollutants Treatment Facility with a cogwheel screen

Similar Documents

Publication Publication Date Title
KR100894022B1 (en) Non-point source contaminant treatment apparatus
KR100987316B1 (en) Non-point source contaminant purification system of combining oil-water separation with upward movement filtration by using filter medium movable filter and non-point source contaminant purification thereby
KR101002809B1 (en) Treating device of early rainwater
KR100905693B1 (en) Treatment apparatus for first flush rainwater
KR100904177B1 (en) Device and method for purifying the first rainwater containing non-point source
KR101288471B1 (en) First flush stormwater treatment apparatus
KR100605267B1 (en) Rainwater controlling device
KR100959945B1 (en) Filtration disposal plant for sewage purification
KR101003477B1 (en) Apparatus for treating rainwater
KR20100020867A (en) Apparatus for removal of nonpoint source pollutant using slope filter
KR101746524B1 (en) Non-point pollution abatement device for the road and bridge
KR100814063B1 (en) Storm water treatment device
KR100913315B1 (en) The apparatus of reducing non-point pollution material in rainwater
WO2015161339A1 (en) A filtration device for filtering polluted drainage water
KR20100122373A (en) Storm water treatment apparatus
RU2548323C1 (en) Waste water treatment apparatus mounted in sewer manhole
KR100713591B1 (en) Purifier for manhole
KR101036018B1 (en) Filter for wastewater treatment and filter set using it
KR101846421B1 (en) Non-point pollution reducing system
KR102229515B1 (en) Non-powered non-point pollution reduction device using circular screen filtration device that can improve river water pollution
KR101177714B1 (en) Reducing apparatus for nonpoint source pollutants of early rainwater on the road
KR101195091B1 (en) Non-point Source Control Facility
KR102118557B1 (en) Filtering apparatus for rainwater treating
KR101291606B1 (en) Reducing apparatus for nonpoint source pollutants of early rainwater on the road containing whirlpool chamber
KR101203059B1 (en) First flush stormwater treatment apparatus

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E90F Notification of reason for final refusal
E902 Notification of reason for refusal
E90F Notification of reason for final refusal
E601 Decision to refuse application