CA2300285A1 - Storm water treatment device - Google Patents
Storm water treatment device Download PDFInfo
- Publication number
- CA2300285A1 CA2300285A1 CA002300285A CA2300285A CA2300285A1 CA 2300285 A1 CA2300285 A1 CA 2300285A1 CA 002300285 A CA002300285 A CA 002300285A CA 2300285 A CA2300285 A CA 2300285A CA 2300285 A1 CA2300285 A1 CA 2300285A1
- Authority
- CA
- Canada
- Prior art keywords
- water treatment
- storm water
- water
- chamber
- storm
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
- E03F5/16—Devices for separating oil, water or grease from sewage in drains leading to the main sewer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/045—Breaking emulsions with coalescers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0045—Plurality of essentially parallel plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0057—Settling tanks provided with contact surfaces, e.g. baffles, particles with counter-current flow direction of liquid and solid particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2221/00—Applications of separation devices
- B01D2221/12—Separation devices for treating rain or storm water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Removal Of Floating Material (AREA)
Abstract
An apparatus for separating the contaminants in a storm water stream in which an assembly of coalescing plates forces the storm water to flow downwardly during passage therethrough. The downward flow encourages particulate material having a specific gravity greater than one to sink and agglomerate and accumulate on the floor of a collection chamber. Oily contaminants in the storm water are encouraged to rise and agglomerate and rise to the water surface in a separate collection chamber.
Description
STORM WATER TREATMENT DEVICE
FIELD OF INVENTION
This invention relates to an improvement in a storm water treatment device which is designed to capture and isolate floatable debris carried in the storm water and additionally separate particulate materials (which are generally heavier than water) and free oils (which are generally lighter than water) from the storm water. This device incorporates a separation treatment unit within its housing which improves the separation performance of this device when compared to prior art separation devices.
This is accomplished by passing the storm water through a series of coalescing plates which are installed in the device to be at a specific angle io or slope and at a predetermined spacing from each other.
BACKGROUND OF THE INVENTION
With the advent of the petroleum age and the ever increasing popularity of the automobile, most ground water which becomes run off is water from parking lots, etc. contains substantial amounts of petroleum products. Likewise with the increase in urban development and higher population densities, storm water runoff from these areas will usually contain a quantity of particulate material (hereafter referred to as suspended solids), a quantity of floating debris and a quantity of non-emulsified liquids which are in most cases petroleum derivatives. Public awareness of the presence of contaminants increasingly drives regulating s bodies to pass laws which limit the amount of contaminants found in a sample of storm water. The public is aware that the contaminated storm water eventually flows into lakes and rivers and thus the resultant negative reaction to the presence of the contaminants in the storm water. Because of the demonstrated lack of suitable equipment to remove these io contaminants on a large scale from storm water, environmentalists have been searching for some means to provide some method of separating these contaminating materials from the storm water. In the past some kind of device is usually placed in storm water runoff path which attempt to remove suspended solids and non-emulsified oils from storm water by is gravitational separation as well as capture coarse floating debris such as leaves, paper cups, plastic bottles, etc. by screening etc. A large portion of those contaminants found in storm water runoff will attach themselves to the fine particulates (suspended solids). Traditionally the removal of fine particulates and free oils is carried out in large containments also 2o known as settling tanks or ponds where separation occurs due to gravity.
The separation efficiency of these settling devices depends on the depth of water in the pond or tank and the length of detention time the storm water is allowed to remain in those tanks/ponds.
SUMMARY OF THE INVENTION
s This invention provides a vault with one or more chambers, one or more inlets, one or more outlets and a permanent pool. Storm water will enter the vault via the one or more inlets and be passed through a screen to capture and retain large particles of floating debris, thence through a treatment device in which liquids lighter than water and suspended solids m are separated from storm water (and each other). The treated storm water (which now forms part of the pool) is allowed to exit the vault through the provided outlet or outlets. The treatment device comprises a series of plates separated from one another by the same distance, and each plate is mounted on a slant in the treatment device so as to slope downwardly at is the same angle. The plates are thus held in the treatment device in such way as to force the stonm water to flow downwardly as it passes therethrough. As the storm water is forced to flow downwardly each of the fine particles will continue to settle (by the force of gravity) in the area between the plates until its path encounters a plate. The particle is then 2o carried downwardly along the surface of the plate (by gravity and the flow of the storm water) and ultimately falls to the bottom of the vault where the particles accumulate. Concurrently, globules of free oil and/or liquids lighter than water will continue to rise until the lighter particles encounter the lower surface of a plate. The globules will slide upwardly along the lower surface of the plates until they reach the surface of the permanent s pool. Note that particle agglomeration of the lighter and heavier particles may occur during the separation process. Access ports are provided as needed in the vault for periodic inspection and to permit removal of floating debris, liquids lighter than water, and settled particulate material from the storm water pool.
io PERTINENT PRIOR ART
U.S. Patent 5 928 524 This patent describes a multichambered separation tank employing several stages of separation. In the first instance, all coarse debris is is removed by debris plates and the preconditioned water is passed through a coalescing unit in which the plates are very closely spaced. In chamber 32 the oil and grit are separated by coalescing unit 48. Both contaminants are deposited in chamber 32 and remain there through the operation of the separator 10.
U.S. Patent S 520 825 This patent describes an oil-water separation device which uses a sloping coalescing plate separator to separate the immiscible oil particles from the water carrying the oil particles. Water flows upwardly through the plates of the separation device. No mention is made of separation of s grit particles in the water undergoing treatment.
U.S. Patent 5 049 278 This patent shows a sloping coalescing plate separating device in which the water (containing sludge) to be treated flows upwardly through the plates of the separation device. In Figure 3 sludge particles fall io downwardly under the influence of gravity into hopper 13. No mention is made of any oil particles which may or may not be suspended in the water undergoing treatment.
U.S. Patent 4 883 603 This patent is directed to separating coarse grained and is agglomerated pigment particles from a liquid having the above named contaminants in addition to fine grained agglomerated particles. The patent utilizes a mufti plate coalescing device wherein the plates are mounted on a slope and the water path is directed upwardly through the slanting coalescer plates. The particles are separated so that the fine ao grained particles rise to the top of the vessel 1 and the coarse grained particles drop to the bottom of the same vessel.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGURE 1 is a sectional elevation view of the separation device of this invention.
s FIGURE 2 is a plan section view of the separation device of Figure 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Figures 1 and 2 show a double chambered tank 10 having a pair of io chambers 12 and 14 separated by a bulkhead 16. Tank 10 is provided with two manholes 18 and 20 for access to inlet chamber 12 and outlet chamber 14 to provide for inspection and pump out of the separated contaminants. Covers 22 and 24 prevent intrusion into chambers 12 and 14.
is Chamber 12 is provided with an inlet for pipe 26 which carries contaminated water into chamber 12 of the separation device 10.
A ladder 28 is mounted from the ceiling 30 to allow inspection personnel to gain access to chamber 12 during operation of the separator 10. A coarse screen 32 is mounted on ladder 28 to separate coarse 2o floating debris (plastic and paper cups, bottles, etc.) from passage to the separating device 34. The screen extends completely across the surface 36 of the water contained in chamber 12.
The separation device 34 consists of a containment vessel 38 mounted on brackets 39 in chamber 12 in which a plurality of coalescing s plates 40 are mounted within vessel 38 at a predetermined slope (about 45 ° ) with a predetermined separation (usually about 4"). The plates extend nearly the entire width of the chamber 12 and the separation device 34 is mounted with the lower portion 42 thereof being formed into a large duct 45 which passes through bulkhead 16 into chamber 14.
io Bulkhead 16 is provided with a pair of vents 44 which equalize the pressure in the chambers 12 and 14.
Ladder 46 provides means for inspection personnel to check the operation of the separation device 10 and determine if pumping the separated sediment 48 in chamber 14 is necessary.
is Chamber 14 is provided with a control box 50 just below outlet 52 wherein outlet pipe 54 is mounted.
The operation of the device is as follows: Separation device 10 is filled with clean water to level 36 before any storm water is allowed to enter via pipe 26.
Zo When contaminated run off water enters the inlet chamber 12 via pipe 26, all coarse debris is captured by screen 32 and kept upstream of the coalescing separation device 34. Water bearing oil, sludge and grit moves across chamber 12 to coalescer 34 where the storm water enters the unit 34 at opening 35 and flows downwardly between coalescing plates 40 until the water reaches lower portion 42 of the separation device 34 where s it passes through bulkhead 16 and into chamber 12.
By this time, fine particles or particles such as oil will have agglomerated and risen to surface 36 of the water in chamber 12.
Meanwhile, particles of a coarser nature especially those having a specific gravity greater than 1 will drop to the lower portion 42 of separation io device 34 and be carried through bulkhead 16 by the storm water flow and into chamber 14 where the sediment forms layer 48 on the floor of chamber 14.
The treated water now flows across chamber 14 and into box 50 and exits via pipe 54. The outlet to pipe 54 establishes the water surface level is 36 of the device 10.
The advantages of the separation device of this invention will be immediately apparent to those skilled in the art.
Unlike prior art separators where the water flows upwardly through the coalescing plates of the separation device, the water in applicant's ao device flows downwardly through the coalescing plates 40. In storm water run off situations where the bulls of the contamination in the water is grit and sludge, the downward flow of the water undergoing treatment acts as a catalyst in the separation of this type of contaminant.
Oil contaminant is separated in device 34 and rises to level 36 of chamber 12 where it is held for removal when the floating layer of oil s becomes su~cient to warrant pumping.
Meanwhile, the sediment 48 builds up in the chamber 14 where it is held until the level is sufficient to warrant removal.
Applicant believes that it is possible to provide for the separation of the lighter and heavier particles in a single chambered vault. However, io applicant feels that excellent separation of the contaminants of the storm water may be obtained using the dual chambered device described previously. Operating and maintenance personnel will find the dual chambered vault more convenient for pumping the separated storm water contaminants from the dual chambers.
is While alternative structures will become readily apparent to those skilled in the art which will provide for separation of the storm water contaminants, applicant prefers to limit the ambit of this invention to the scope of the following claims.
FIELD OF INVENTION
This invention relates to an improvement in a storm water treatment device which is designed to capture and isolate floatable debris carried in the storm water and additionally separate particulate materials (which are generally heavier than water) and free oils (which are generally lighter than water) from the storm water. This device incorporates a separation treatment unit within its housing which improves the separation performance of this device when compared to prior art separation devices.
This is accomplished by passing the storm water through a series of coalescing plates which are installed in the device to be at a specific angle io or slope and at a predetermined spacing from each other.
BACKGROUND OF THE INVENTION
With the advent of the petroleum age and the ever increasing popularity of the automobile, most ground water which becomes run off is water from parking lots, etc. contains substantial amounts of petroleum products. Likewise with the increase in urban development and higher population densities, storm water runoff from these areas will usually contain a quantity of particulate material (hereafter referred to as suspended solids), a quantity of floating debris and a quantity of non-emulsified liquids which are in most cases petroleum derivatives. Public awareness of the presence of contaminants increasingly drives regulating s bodies to pass laws which limit the amount of contaminants found in a sample of storm water. The public is aware that the contaminated storm water eventually flows into lakes and rivers and thus the resultant negative reaction to the presence of the contaminants in the storm water. Because of the demonstrated lack of suitable equipment to remove these io contaminants on a large scale from storm water, environmentalists have been searching for some means to provide some method of separating these contaminating materials from the storm water. In the past some kind of device is usually placed in storm water runoff path which attempt to remove suspended solids and non-emulsified oils from storm water by is gravitational separation as well as capture coarse floating debris such as leaves, paper cups, plastic bottles, etc. by screening etc. A large portion of those contaminants found in storm water runoff will attach themselves to the fine particulates (suspended solids). Traditionally the removal of fine particulates and free oils is carried out in large containments also 2o known as settling tanks or ponds where separation occurs due to gravity.
The separation efficiency of these settling devices depends on the depth of water in the pond or tank and the length of detention time the storm water is allowed to remain in those tanks/ponds.
SUMMARY OF THE INVENTION
s This invention provides a vault with one or more chambers, one or more inlets, one or more outlets and a permanent pool. Storm water will enter the vault via the one or more inlets and be passed through a screen to capture and retain large particles of floating debris, thence through a treatment device in which liquids lighter than water and suspended solids m are separated from storm water (and each other). The treated storm water (which now forms part of the pool) is allowed to exit the vault through the provided outlet or outlets. The treatment device comprises a series of plates separated from one another by the same distance, and each plate is mounted on a slant in the treatment device so as to slope downwardly at is the same angle. The plates are thus held in the treatment device in such way as to force the stonm water to flow downwardly as it passes therethrough. As the storm water is forced to flow downwardly each of the fine particles will continue to settle (by the force of gravity) in the area between the plates until its path encounters a plate. The particle is then 2o carried downwardly along the surface of the plate (by gravity and the flow of the storm water) and ultimately falls to the bottom of the vault where the particles accumulate. Concurrently, globules of free oil and/or liquids lighter than water will continue to rise until the lighter particles encounter the lower surface of a plate. The globules will slide upwardly along the lower surface of the plates until they reach the surface of the permanent s pool. Note that particle agglomeration of the lighter and heavier particles may occur during the separation process. Access ports are provided as needed in the vault for periodic inspection and to permit removal of floating debris, liquids lighter than water, and settled particulate material from the storm water pool.
io PERTINENT PRIOR ART
U.S. Patent 5 928 524 This patent describes a multichambered separation tank employing several stages of separation. In the first instance, all coarse debris is is removed by debris plates and the preconditioned water is passed through a coalescing unit in which the plates are very closely spaced. In chamber 32 the oil and grit are separated by coalescing unit 48. Both contaminants are deposited in chamber 32 and remain there through the operation of the separator 10.
U.S. Patent S 520 825 This patent describes an oil-water separation device which uses a sloping coalescing plate separator to separate the immiscible oil particles from the water carrying the oil particles. Water flows upwardly through the plates of the separation device. No mention is made of separation of s grit particles in the water undergoing treatment.
U.S. Patent 5 049 278 This patent shows a sloping coalescing plate separating device in which the water (containing sludge) to be treated flows upwardly through the plates of the separation device. In Figure 3 sludge particles fall io downwardly under the influence of gravity into hopper 13. No mention is made of any oil particles which may or may not be suspended in the water undergoing treatment.
U.S. Patent 4 883 603 This patent is directed to separating coarse grained and is agglomerated pigment particles from a liquid having the above named contaminants in addition to fine grained agglomerated particles. The patent utilizes a mufti plate coalescing device wherein the plates are mounted on a slope and the water path is directed upwardly through the slanting coalescer plates. The particles are separated so that the fine ao grained particles rise to the top of the vessel 1 and the coarse grained particles drop to the bottom of the same vessel.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGURE 1 is a sectional elevation view of the separation device of this invention.
s FIGURE 2 is a plan section view of the separation device of Figure 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Figures 1 and 2 show a double chambered tank 10 having a pair of io chambers 12 and 14 separated by a bulkhead 16. Tank 10 is provided with two manholes 18 and 20 for access to inlet chamber 12 and outlet chamber 14 to provide for inspection and pump out of the separated contaminants. Covers 22 and 24 prevent intrusion into chambers 12 and 14.
is Chamber 12 is provided with an inlet for pipe 26 which carries contaminated water into chamber 12 of the separation device 10.
A ladder 28 is mounted from the ceiling 30 to allow inspection personnel to gain access to chamber 12 during operation of the separator 10. A coarse screen 32 is mounted on ladder 28 to separate coarse 2o floating debris (plastic and paper cups, bottles, etc.) from passage to the separating device 34. The screen extends completely across the surface 36 of the water contained in chamber 12.
The separation device 34 consists of a containment vessel 38 mounted on brackets 39 in chamber 12 in which a plurality of coalescing s plates 40 are mounted within vessel 38 at a predetermined slope (about 45 ° ) with a predetermined separation (usually about 4"). The plates extend nearly the entire width of the chamber 12 and the separation device 34 is mounted with the lower portion 42 thereof being formed into a large duct 45 which passes through bulkhead 16 into chamber 14.
io Bulkhead 16 is provided with a pair of vents 44 which equalize the pressure in the chambers 12 and 14.
Ladder 46 provides means for inspection personnel to check the operation of the separation device 10 and determine if pumping the separated sediment 48 in chamber 14 is necessary.
is Chamber 14 is provided with a control box 50 just below outlet 52 wherein outlet pipe 54 is mounted.
The operation of the device is as follows: Separation device 10 is filled with clean water to level 36 before any storm water is allowed to enter via pipe 26.
Zo When contaminated run off water enters the inlet chamber 12 via pipe 26, all coarse debris is captured by screen 32 and kept upstream of the coalescing separation device 34. Water bearing oil, sludge and grit moves across chamber 12 to coalescer 34 where the storm water enters the unit 34 at opening 35 and flows downwardly between coalescing plates 40 until the water reaches lower portion 42 of the separation device 34 where s it passes through bulkhead 16 and into chamber 12.
By this time, fine particles or particles such as oil will have agglomerated and risen to surface 36 of the water in chamber 12.
Meanwhile, particles of a coarser nature especially those having a specific gravity greater than 1 will drop to the lower portion 42 of separation io device 34 and be carried through bulkhead 16 by the storm water flow and into chamber 14 where the sediment forms layer 48 on the floor of chamber 14.
The treated water now flows across chamber 14 and into box 50 and exits via pipe 54. The outlet to pipe 54 establishes the water surface level is 36 of the device 10.
The advantages of the separation device of this invention will be immediately apparent to those skilled in the art.
Unlike prior art separators where the water flows upwardly through the coalescing plates of the separation device, the water in applicant's ao device flows downwardly through the coalescing plates 40. In storm water run off situations where the bulls of the contamination in the water is grit and sludge, the downward flow of the water undergoing treatment acts as a catalyst in the separation of this type of contaminant.
Oil contaminant is separated in device 34 and rises to level 36 of chamber 12 where it is held for removal when the floating layer of oil s becomes su~cient to warrant pumping.
Meanwhile, the sediment 48 builds up in the chamber 14 where it is held until the level is sufficient to warrant removal.
Applicant believes that it is possible to provide for the separation of the lighter and heavier particles in a single chambered vault. However, io applicant feels that excellent separation of the contaminants of the storm water may be obtained using the dual chambered device described previously. Operating and maintenance personnel will find the dual chambered vault more convenient for pumping the separated storm water contaminants from the dual chambers.
is While alternative structures will become readily apparent to those skilled in the art which will provide for separation of the storm water contaminants, applicant prefers to limit the ambit of this invention to the scope of the following claims.
Claims (13)
1.A storm water treatment device for separating contaminants from storm water as it passes therethrough, said device comprising a tank having inlet means, outlet means, and water treatment means through which storm water must flow during passage through said tank, screen means installed in said tank between said inlet means and said water treatment means to separate and retain floating debris in said storm water before passage through said water treatment means, said water treatment means comprising a plurality of evenly spaced sloping plates mounted in said tank through which said storm water passes downwardly to provide an opportunity for separation of fine particles of grit and free oil from said storm water during passage through said water treatment means.
2. A storm water treatment device as claimed in claim 1 wherein the separation between the plates is sufficient to permit coalescence of said particles to occur.
3. A storm water treatment device as claimed in claim 2 wherein said plates of said water treatment device extend in a horizontal direction substantially across said tank and are contained in a suitable housing.
4. A storm water treatment device comprising a tank having an inlet chamber and an outlet chamber, and bulkhead means separating said inlet and outlet chambers, said inlet chamber having an inlet for feeding storm water into said inlet chamber at a predetermined level, said outlet chamber having outlet means at a predetermined level in said outlet chamber for permitting water to flow out of said outlet chamber, water treatment means installed in said water treatment device comprising a plurality of spaced coalescing plates mounted in said device so as to cause said storm water to flow downwardly between said plates to accelerate separation of contaminants in said storm water.
5. A storm water treatment device as claimed in claim 4 wherein said water treatment means has a water treatment inlet in said inlet chamber and a water treatment outlet in said outlet chamber.
6. A storm water treatment device as claimed in claim 5 wherein said water treatment means provides a path for water to flow from said inlet chamber through a passageway in said bulkhead means to said outlet chamber.
7. A storm water treatment device as claimed in claim 6 having screen means installed in said inlet chamber for separation of any floating debris from said storm water prior to passage through said water treatment means.
8. A storm water treatment device as claimed in claim 4 wherein said plates in said water treatment means are spaced a predetermined distance apart.
9. A storm water treatment device as claimed in claim 4 wherein oily contaminants rise from said water treatment means in said water in said inlet chamber and heavier particulate contaminants sink from said water treatment means in said water in said outlet chamber.
10. A storm water treatment device as claimed in claim 8 wherein access means is provided for said inlet and outlet chambers to permit inspection and removal of contaminants therefrom.
11. A storm water treatment tank as claimed in claim 10 wherein oily contaminants in said storm water are separated in said treatment device and rise in said storm water in said first chamber and said particles separated in said treatment device having a specific gravity greater than 1 are carried by said storm water into said second chamber to sink in said feed water.
12. A storm water treatment tank for the separation of contaminants carried by said storm water,
13 comprising a first chamber in said tank for receiving untreated storm water;
floating debris removal means for removing and capturing coarse floating debris carried into said first chamber by said storm water, a coalescing plate water treatment device mounted in said first chamber having outlet means communicating with a second chamber for feeding treated storm water into said second chamber, said water treatment device causing said storm water to flow downwardly therethrough to accelerate the separation of particles contained in said storm water having a specific gravity greater than one.
floating debris removal means for removing and capturing coarse floating debris carried into said first chamber by said storm water, a coalescing plate water treatment device mounted in said first chamber having outlet means communicating with a second chamber for feeding treated storm water into said second chamber, said water treatment device causing said storm water to flow downwardly therethrough to accelerate the separation of particles contained in said storm water having a specific gravity greater than one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002300285A CA2300285A1 (en) | 2000-03-07 | 2000-03-07 | Storm water treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002300285A CA2300285A1 (en) | 2000-03-07 | 2000-03-07 | Storm water treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2300285A1 true CA2300285A1 (en) | 2001-09-07 |
Family
ID=4165467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002300285A Abandoned CA2300285A1 (en) | 2000-03-07 | 2000-03-07 | Storm water treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2300285A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113624A (en) * | 2015-09-16 | 2015-12-02 | 江苏河马井股份有限公司 | Oil separating and desilting device for rainwater |
-
2000
- 2000-03-07 CA CA002300285A patent/CA2300285A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113624A (en) * | 2015-09-16 | 2015-12-02 | 江苏河马井股份有限公司 | Oil separating and desilting device for rainwater |
| CN105113624B (en) * | 2015-09-16 | 2019-02-26 | 江苏河马井股份有限公司 | Rainwater oil separation desilting device |
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| Date | Code | Title | Description |
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| FZDE | Dead |