Stormwater treatment device

Abstract

To provide a system, method, and device for removing contaminants from stormwater.SOLUTION: A stormwater treatment device 100 may include a chamber having a floor and walls 115, an inlet 105 formed in one of the walls to receive stormwater into the inlet side of the chamber, an outlet 110 formed in one of the walls to discharge stormwater from the outlet side of the chamber, an enhanced settling device 125 disposed within the outlet side of the chamber, a flow divider plate in a lower portion of the chamber, and an outlet control diverter disposed proximate to the outlet. The stormwater is received by the inlet in a first flow direction, flows from the inlet side to the lower portion of the chamber in a second flow direction, flows through the enhanced settling device to the upper portion of the chamber in a third flow direction, flows through the outlet control diverter 135 in a fourth flow direction, and is discharged by the outlet in a fifth flow direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001]

[0001] This disclosure generally relates to systems, methods, and devices for removing contaminants from rainwater.

Background Art

[0002]

[0002] When it rains, rainwater travels across various surfaces before reaching the sewer. Along its path, rainwater picks up and suspends both natural and artificial contaminants and carries the contaminants to the sewer. The sewer provides the first opportunity to remove some of these contaminants from the rainwater before the rainwater continues its journey to the water body.

Summary of the Invention

Problems to be Solved by the Invention

[0003]

[0003] Disclosed are systems, methods, and devices for removing contaminants from rainwater.

Means for Solving the Problems

[0004] According to one embodiment, the rainwater treatment device includes the following, namely, a chamber having a floor and walls, an inlet formed in the wall for receiving rainwater on the inlet side of the chamber, an outlet formed in the wall for discharging rainwater from the outlet side of the chamber, a vertical baffle that divides at least a part of the chamber into an inlet side and an outlet side, wherein the inlet side and the outlet side are in fluid communication, a vertical baffle, and an enhanced sedimentation separation device disposed within the outlet side of the chamber, wherein a portion below the bottom of the enhanced sedimentation separation device of the chamber defines the lower portion of the chamber, and a portion above the top of the enhanced sedimentation separation device of the chamber defines the upper portion of the chamber, an enhanced sedimentation separation device, a flow dividing plate within the lower portion of the chamber, and an outlet control diverter disposed adjacent to the outlet. Rainwater may be received by the inlet in a first flow direction, flow from the inlet side to the lower portion of the chamber in a second flow direction, flow through the enhanced sedimentation separation device to the upper portion of the chamber in a third flow direction, flow through the outlet control diverter in a fourth flow direction, and be discharged by the outlet in a fifth flow direction.

[0005] In one embodiment, the rainwater treatment device further includes one or more vanes disposed on the vertical baffle, and the plurality of vanes may extend towards the inlet side of the chamber.

[0006] In one embodiment, horizontal vanes are disposed on the vertical baffle and may extend towards the inlet side of the chamber. Additionally, a plurality of vertical vanes are provided, and the vertical vanes may extend from the ends of the horizontal vanes.

[0007] In one embodiment, the enhanced sedimentation separation device includes a plurality of tubes, and each tube may be disposed at an angle from the wall towards the vertical baffle. In one embodiment, the angles may be different for each tube, different for each of the plurality of tubes, etc.

[0008] In one embodiment, the enhanced sedimentation separation device includes a plurality of tubes, a first subset of the plurality of tubes is arranged at a first angle with respect to the horizontal, and a second subset of the plurality of tubes may be arranged at a second angle with respect to the horizontal.

[0009] In one embodiment, the top of the enhanced sedimentation separation device may be below the lower surface of the outlet control diverter.

[0010] In one embodiment, rainwater having a flow rate above a specific value flows over a vertical baffle and flows.

[0011] In one embodiment, the outlet control diverter includes a bottom face piece and two vertical side face pieces, and an opening for receiving rainwater may be defined by at least one of the bottom face piece, the vertical side face piece, and the wall.

[0012] In one embodiment, the change in the flow direction optimizes the time the rainwater spends in the chamber.

[0013] In one embodiment, the chamber may be cylindrical.

[0014] According to another embodiment, a method for removing suspended contaminants from rainwater includes the following steps: (1) receiving rainwater containing suspended contaminants at the inlet of a rainwater treatment device, where the rainwater flows into the inlet side of the rainwater treatment device and the fluid velocity of the rainwater decreases; (2) receiving the rainwater in the lower part of the rainwater treatment device; (3) receiving the rainwater from the lower part into an enhanced sedimentation separation device, where the rainwater is redirected to flow into the upper part of the chamber on the outlet side of the chamber through the enhanced sedimentation separation device; (4) receiving the rainwater from the upper part at an outlet control diverter, where the rainwater is redirected to be received by the outlet control diverter; and (5) discharging the rainwater at the outlet.

[0015]

[0015] In one embodiment, the enhanced sedimentation separation device includes a plurality of tubes, and a first subset of the plurality of tubes may be arranged at a first angle with respect to the horizontal, and a second subset of the plurality of tubes may be arranged at a second angle with respect to the horizontal.

[0016]

[0016] In one embodiment, the top of the enhanced sedimentation separation device may be below the lower surface of the outlet control diverter.

[0017]

[0017] In one embodiment, rainwater having a flow rate above a specific value flows into the upper part of the rainwater treatment device over the vertical baffle.

[0018]

[0018] In one embodiment, the outlet control diverter includes a bottom face piece and two vertical side face pieces, and an opening for receiving rainwater may be defined by at least one of the bottom face piece and the vertical side face piece and the wall.

[0019]

[0019] In one embodiment, the change in the flow direction optimizes the time that the rainwater spends in the chamber.

[0020]

[0020] In one embodiment, the chamber may be cylindrical.

[0021]

[0021] According to another embodiment, a system for removing contaminants from rainwater includes the following, namely, a chamber having a horizontal floor and vertical walls attached to the floor, the chamber walls forming a cylinder, with an inlet and an outlet on opposite sides of the cylinder, the chamber, an inlet in one wall for receiving contaminated rainwater and an outlet in a wall for discharging treated rainwater, a vertical baffle within the chamber, the vertical baffle being perpendicular to the vertical plane bisecting the inlet and dividing the chamber into an inlet side and an outlet side, the outlet side being between the baffle and the outlet opening, the inlet side being between the baffle and the inlet opening, and the two sides being in fluid communication, the vertical baffle, and a stack of lamella tubes disposed within the outlet side, the major axis of each tube being angled with respect to the horizontal at approximately right angles to the vertical plane bisecting the inlet, and the top of the stack of tubes being at least 6 inches (15.24 cm) below the invert of the outlet, the stack of lamella tubes stack, and one or more splitter plates attached to the wall of the chamber on the outlet side below the stack of lamella tubes, and a diverter installed at the entrance to the outlet, may be included.

[0022]

[0022] In one embodiment, the walls of the chamber may form a rectangular prism structure.

[0023]

[0023] In one embodiment, the angle between the vertical plane bisecting the inlet and the vertical plane bisecting the outlet is between 45 and 315 degrees.

[0024]

[0024] In one embodiment, the top of the vertical baffle is at a level above the invert of the inlet pipe such that water passes over the top of the vertical baffle at flows above the design flow rate.

[0025]

[0025] In one embodiment, the bottom of the vertical baffle is at least 2 feet (60.96 cm) from the bottom of the chamber.

[0026]

[0026] In one embodiment, the vertical baffle may have one or more vanes extending at right angles from the baffle towards the inlet.

[0027]

[0027] In one embodiment, at least two vanes may extend 1 to 5 inches (2.54 to 12.7 cm) from the baffle.

[0028]

[0028] In one embodiment, at least two vanes are installed 3 to 6 inches (7.62 to 15.24 cm) from the point where the baffle intersects the wall of the trough on each side of the baffle, and the arrangement of such vanes is symmetric about a vertical plane bisecting the inlet.

[0029]

[0029] In one embodiment, the major axis of each tube is at an angle of 50 to 70 degrees from the horizontal, and the direction of this angle is between 45 and 135 degrees with respect to the vertical plane bisecting the inlet.

[0030]

[0030] In one embodiment, the bottom of the stack of lamella tubes is above the bottom of the vertical baffle.

[0031]

[0031] In one embodiment, the diverter plate is flat, and at least one plate is attached to the wall below the outlet such that the plate has the same center line as the outlet and forms an angle between 45 and 135 degrees from the horizontal. The second diverter plate may be attached to the wall in the direction of the angle of the lamella tube such that the center line of the plate coincides with the center line of the wall. The third diverter plate may be attached to the wall on the side opposite the second diverter plate such that the center line of the plate coincides with the center line of the wall. The second and third diverter plates may have the same angle with respect to the horizontal within the range of 45 to 135 degrees as the first diverter plate or not. In one embodiment, more than one diverter plate may be manufactured as a single piece.

[0032]

[0032] In one embodiment, the sagitta of each diverter plate may be between 3 and 14 inches (7.62 to 35.56 cm).

[0033]

[0033] In one embodiment, the outlet diverter includes a horizontal bottom piece at the same elevation as the outlet invert and two vertical side pieces. The first vertical side piece projects parallel to a vertical plane that bisects the outlet from one side of the outlet opening. The second vertical side piece is substantially perpendicular to the first vertical side piece and parallel to the tangent to the chamber wall at the midpoint of the outlet. The bottom piece and the two vertical side pieces form an opening through which water can reach the outlet opening.

[0034]

[0034] In one embodiment, the second vertical side piece may be curved.

[0035]

[0035] In one embodiment, the outlet diverter may include a first vertical side piece that projects at least 6 inches (15.24 cm) from one side of the outlet opening and a second vertical side piece that is at least 8 inches (20.32 cm) in length. The outlet diverter may include two vertical side pieces that project at least 4 inches (10.16 cm) above the horizontal side piece.

[0036]

[0036] In one embodiment, the outlet diverter includes an opening through which water can reach the outlet opening on the opposite side of the outlet from the angle of the lamella tube. Thus, the water flowing through the tube must reverse direction at least twice to enter the opening of the diverter.

[0037]

[0037] In one embodiment, the outlet diverter includes an opening through which water can reach an outlet opening that is at least 6 inches (15.24 cm) wide.

[0038]

[0038] To more fully understand the present disclosure, its objects, and advantages, reference is now made to the following description taken in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0039]

Figure 1

Figure 2A

Figure 2B

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

DETAILED DESCRIPTION OF THE INVENTION

[0040]

[0050] The embodiments are directed to a system for removing contaminants from rainwater. Referring to FIGS. 1-8, various views of a rainwater treatment device according to an embodiment are provided.

[0041]

[0051] The rainwater treatment device 100 may define a chamber including an inlet 105, an outlet 110, a wall 115, vertical baffles 120, one or more diverters 130, and an outlet control diverter 135. In one embodiment, rainwater carrying contaminants may enter through the inlet 105 and flow into the lower portion 150 of the rainwater treatment device 100. In one embodiment, depending on the inflow rate of the rainwater, the rainwater hits the vertical baffle 120, reduces its speed, and flows downward.

[0042]

[0052] In one embodiment, the distance of the vertical baffle 120 from the inlet 105 may be a balance between having more elements within the enhanced sedimentation separation device 125 and having an opening that allows for cleaning and inspection. Shortening the distance may improve performance, but it may make cleaning and inspection more difficult. In addition, shortening the distance may increase scouring. There is also a possibility.

[0043]

[0053] In one embodiment, the vertical baffle 120 may be arranged and / or sized such that at a flow rate exceeding the design flow rate, the rainwater passes over the top of the vertical baffle 120, and the top of the vertical baffle 120 is at a height above the invert of the inlet 105.

[0044]

[0054] The vertical baffle 120 may divide the chamber defined by the rainwater treatment device 100 into an inlet side and an outlet side.

[0045]

[0055] In one embodiment, the bottom of the vertical baffle 120 is arranged to optimize the water flow within the lower portion 150 of the rainwater treatment device 100 and can be arranged according to the size of the rainwater treatment device 100. In one embodiment, the bottom of the vertical baffle 120 may be at least 2 feet (60.96 cm) from the bottom of the rainwater treatment device 100. Other installation positions may be used as necessary and / or desired.

[0046]

[0056] Rainwater can continue to flow from the lower portion 150 of the rainwater treatment device 100 to the upper portion 155 of the rainwater treatment device. In one embodiment, an enhanced sedimentation separation device 125, such as a lamella tube, may be disposed between the lower portion 150 and the upper portion 155.

[0047]

[0057] In various embodiments, the enhanced sedimentation separation device 125 may comprise a plurality of sheets, each sheet being formed with angled ridges. In one embodiment, the sheets may be installed such that the ridges of adjacent sheets are parallel and form tubes arranged at an angle to the vertical. In another embodiment, the sheets may be installed such that the ridges of adjacent sheets are perpendicular and create a series of tortuous paths.

[0048]

[0058] In one embodiment, the bottom of the enhanced sedimentation separation device 125 may be above the bottom of the vertical baffle 120.

[0049]

[0059] One or more diverters 130, 131, and 132 may be provided in the lower portion 150 of the rainwater treatment device 100 to divert the flow of untreated rainwater so that the suspended contaminants have more time to drop out of the suspension. In one embodiment, the diverters 130, 131, and / or 132 will further prevent the incoming untreated rainwater from resuspending the contaminants.

[0050]

[0060] In one embodiment, the diverters 130, 131, and / or 132 may be plates. In one embodiment, the plate may be flat. In one embodiment, the second diverter (131) may be attached to the wall 115 in the angular direction of the lamella tube such that the center line of the second diverter coincides with the center line of the wall 115. The third diverter 132 may be attached to the wall 115 on the side opposite the second diverter 131 such that the center line of the third diverter coincides with the center line of the wall 115. Two or more of the diverters may be manufactured as a single piece. The sagitta of each diverter may be 30% of the distance to the opposite wall or baffle. For example, for a tank with a diameter of 48 inches (121.92 cm), the upper limit would be 14 inches (35.56 cm). Before the rainwater can exit through the outlet 110, the outlet control diverter 135 will further constrict the flow of the rainwater. In one embodiment, the outlet control diverter can prevent the rainwater from flowing directly from the lower portion 150 to the upper portion 155 and then out of the outlet 110 without changing the flow direction. The outlet control diverter 135 will further cause the suspended contaminants to drop out of the suspension liquid.

[0051]

[0061] The outlet control diverter 135 is flat and the plate of the outlet control diverter 135 has the same center line as the outlet 110 and is attached to the wall 115 below the outlet 110 such that the outlet control diverter 135 forms an angle of 45 to 135 degrees from the horizontal.

[0052]

[0062]

[0053]

[0063] ​​The outlet control diverter 135 may include a horizontal bottom piece and two vertical side pieces at the same height as the invert of the outlet 110. The first vertical side piece may project from one side of the outlet 110 and be substantially parallel to the vertical plane bisecting the outlet 110. The second vertical side piece may be substantially perpendicular to the first vertical side piece and parallel to the tangent of the wall 115 taken along the center line of the outlet. The bottom piece and the two vertical side pieces form an opening through which water can reach the outlet 110. In one embodiment, each vertical side piece may project at least 4 inches (10.16 cm) from the horizontal side piece.

[0054]

[0064] The dimensions of the outlet control diverter 135 and its various parts may vary based on the size of the rainwater treatment device 100, but in one embodiment, the first vertical side piece projects at least 6 inches (15.24 cm) from one side of the outlet 110, and the second vertical side piece may be at least 8 inches (20.32 cm) in length. The dimensions vary depending on the size of the rainwater treatment device 100, and generally, larger devices will have larger elements and smaller devices will have smaller elements. In one embodiment, the second vertical side piece may be curved. The size of the side piece may be selected to maximize the path length to the outlet 110 while still being close to the size of the outlet 110.

[0055]

[0065] In one embodiment, the maximum dimension perpendicular to the vertical plane bisecting the inlet 105 can be less than or equal to the maximum dimension parallel to the vertical plane bisecting the inlet 105. For example, the length between the inlet 105 and the outlet 110 may be greater than the width of the chamber. This may be useful, for example, when the shape of the chamber is rectangular. The angle between the vertical plane bisecting the inlet 105 and the vertical plane bisecting the outlet 110 may be between 45 and 315 degrees. Other angles may be used as necessary and / or desired.

[0056]

[0066] Referring to FIGS. 7 and 8, exemplary details regarding the enhanced sedimentation separation device 125 are provided in accordance with various embodiments. The enhanced sedimentation separation device 125 may include a plurality of lamella tubes. The lamella tubes may have any suitable shape. In one embodiment, as shown in FIG. 7, the lamella tubes can have a hexagonal shape. Other tube shapes such as rectangular, parallelogram, circular, etc. can be used as well. In one embodiment, the dimensions of each tube may be selected to minimize the height of each channel provided by the tube, i.e., to minimize the sedimentation separation distance.

[0057]

[0067] In one embodiment, the lamella tubes of the enhanced sedimentation separation device 125 may be arranged at an angle from horizontal. In one embodiment, the water flowing through the enhanced sedimentation separation device 125 must reverse direction at least twice in order to enter the opening of the outlet control diverter 135. For example, rainwater reverses direction when traveling through the enhanced sedimentation separation device 125 from the lower portion 150 to the upper portion 155 and reverses direction again when proceeding from the enhanced sedimentation separation device 125 to the outlet 110. The outlet diverter 135 will force yet another direction change.

[0058]

[0068] In one embodiment, the angle may be selected to optimize self-cleaning of the sedimentation tubes in the enhanced sedimentation separation device 125. For example, the angle may be between 45 and 75 degrees. Other angles may be used as necessary and / or desired.

[0059]

[0069] In one embodiment, the lamella tubes of the enhanced sedimentation separation device 125 may be arranged at different angles with respect to horizontal. For example, a first subset of the lamella tubes may be arranged at a first angle with respect to horizontal and a second subset of the lamella tubes may be arranged at a second angle with respect to horizontal, etc. The (single or multiple) angles may be selected as necessary and / or desired.

[0060]

[0070] In one embodiment, as shown in FIG. 2A, the vertical baffle 120 may include one or more vanes 140 that extend downward from the top of the vertical baffle 120 on the inlet side and that help prevent the formation of vortices in the flow on the inlet side. For example, the vanes 140 may extend downward 12 to 36 inches (30.48 to 91.44 cm) below the top of the vertical baffle 120 and 1 to 5 inches (2.54 to 12.7 cm) away from the baffle. The dimensions of the vanes 140 may vary depending on the size of the rainwater treatment device 100. In one embodiment, at least one vane 140 is disposed at least 3 inches (7.62 cm) from the point where the baffle 120 intersects the wall of the rainwater treatment device 100, and the other vane 140 may be disposed at least 3 inches (7.62 cm) from the point where the other side of the baffle 120 intersects the wall of the rainwater treatment device 100. Any arrangement of the vanes 140 may bisect the vertical baffle 120 and be symmetric about a vertical plane that is perpendicular to the vertical baffle 120.

[0061]

[0071] In another embodiment, as shown in FIG. 2B, the vanes 140 are provided in a horizontal orientation.

[0062]

[0072] The rainwater treatment device 100 may be configured to redirect the flow of water within the rainwater treatment device 100 several times. The purpose of the redirection is to optimize the time that the rainwater spends within the rainwater treatment device 100. Since gravitational sedimentation is time-consuming and the volume and flow rate may be limited by the dimensions of the rainwater treatment device 100, this redirection makes the most effective use of the volume within the rainwater treatment device 100.

[0063]

[0073] Referring to FIGS. 9 and 10, an isometric view and a cross-sectional view of a rainwater treatment device according to another embodiment are provided respectively. The rainwater treatment device 900 may define a chamber including an inlet 905, an outlet 910, a wall 915, an inner chamber wall 960, and a support 965. In one embodiment, rainwater carrying contaminants enters the inlet 905 and falls into the outer chamber 950 of the rainwater treatment device 900. The rainwater then flows through the enhanced sedimentation separation device 925 into the inner chamber 955 of the rainwater treatment device 900 and can then exit through the outlet 910.

[0064]

[0074] It should be noted that in an alternative embodiment, the enhanced sedimentation separation device 925 is provided within the outer chamber 950 of the rainwater treatment device, and rainwater may be provided to the inner chamber 965 of the rainwater treatment device 900 through the inlet 905. The outlet 910 is provided in the outer chamber 950, so that when the rainwater flows through the enhanced sedimentation separation device 925, the rainwater exits the rainwater treatment device 900 through the outlet 910.

[0065]

[0075] The enhanced sedimentation separation device 925 may be similar to the enhanced sedimentation separation device 125 described above.

[0066]

[0076] Referring to FIG. 11, a method for removing contaminants from rainwater is disclosed according to one embodiment.

[0067]

[0077] In step 1105, rainwater carrying contaminants flows into the inlet side of the rainwater treatment device and spreads, thereby reducing the fluid velocity.

[0068]

[0078] In step 1110, rainwater flows into the lower part of the rainwater treatment device as long as the flow does not exceed a specific design flow rate. For example, if the flow is above the specific design flow rate, an amount of rainwater proportional to the amount of flow above the specific design flow rate will directly flow over the baffle and into the upper part of the rainwater treatment device, while the remaining flow will flow into the lower part of the rainwater treatment device.

[0069]

[0079] In step 1115, rainwater flows into the lower part, and pollutants will be released from the suspension due to gravitational sedimentation. The sedimented pollutants will accumulate in the lower part of the rainwater treatment device.

[0070]

[0080] In step 1120, the rainwater changes direction and flows upward through an enhanced sedimentation separation device such as a lamella tube. These tubes provide a shorter sedimentation distance, shortening the time required for sedimentation. This facilitates the sedimentation of smaller particles. The particles sedimented in the enhanced sedimentation separation device will ultimately fall into the lower part of the rainwater treatment device.

[0071]

[0081] In step 1125, the rainwater exits the enhanced sedimentation separation device and changes direction in the upper part of the rainwater treatment device.

[0072]

[0082] In step 1130, the rainwater reaches the outlet diverter and can flow out through the outlet. In one embodiment, the structure of the outlet diverter may be such that it causes the rainwater to change direction again before flowing out through the outlet.

[0073]

[0083] Those skilled in the art will understand that the present invention is not limited to what has been specifically shown and described above. Rather, the scope of the present invention includes both combinations and partial combinations of the features described above, as well as its variations and modifications that are not in the prior art. Furthermore, it should be recognized that these embodiments are not mutually exclusive.

[0074]

[0084] As will be readily understood by those skilled in the art, the embodiments disclosed herein are capable of a wide range of utility and application. Many embodiments and adaptations of the present invention, as well as many variations, modifications, and equivalent arrangements, other than those described herein, will become apparent or reasonably suggested from the present invention and the foregoing description thereof without departing from the spirit or scope of the present invention.

[0075]

[0085] Accordingly, while the present invention has been described in detail herein in connection with its exemplary embodiments, it is to be understood that this disclosure is for the purpose of illustration only and is merely exemplary of the present invention, and is made to provide a disclosure of the invention to the extent enabled. Accordingly, the foregoing disclosure is not intended to be construed as or to limit the present invention, nor is it intended to exclude any other such embodiments, adaptations, variations, modifications, or equivalent arrangements.

Description of Reference Numerals

[0076] 100 Rainwater treatment device 105 Inlet 110 Outlet 115 Wall 120 Vertical baffle 125 Enhanced sedimentation separation device 130, 131, 132 Flow dividers 135 Outlet control flow divider 140 Blade 150 Lower part 155 Upper part 900 Rainwater treatment device 905 Inlet 910 Outlet 915 Wall 925 Enhanced sedimentation separation device 950 Outer chamber 955 Inner chamber 960 Inner chamber wall 965 Support

Claims

1. A storm water treatment device comprising: a chamber having a floor and walls; an inlet formed in the wall for receiving rainwater into the inlet side of the chamber; an outlet formed in the wall for draining storm water from an outlet side of the chamber; a vertical baffle dividing at least a portion of the chamber into the inlet side and the outlet side, the inlet side and the outlet side being in fluid communication; an enhanced sedimentation device disposed within the outlet side of the chamber, a portion of the chamber below a bottom of the enhanced sedimentation device defining a lower portion of the chamber and a portion of the chamber above a top of the enhanced sedimentation device defining an upper portion of the chamber; a flow distributor in a lower portion of the chamber; an outlet control diverter disposed proximate to the outlet, 1. A storm water treatment device, wherein storm water is received by the inlet in a first flow direction, flows from the inlet side to the lower portion of the chamber in a second flow direction, flows through the enhanced settling device to the upper portion of the chamber in a third flow direction, flows through the outlet control diverter in a fourth flow direction, and is discharged by the outlet in a fifth flow direction.

2. 2. The storm water treatment device according to claim 1, The storm water treatment device further comprising a plurality of substantially vertical vanes disposed on the vertical baffle, the plurality of substantially vertical vanes extending toward the inlet side of the chamber.

3. 2. The storm water treatment device according to claim 1, A storm water treatment device further comprising a horizontal vane disposed on the vertical baffle, the horizontal vane extending into the inlet side of the chamber.

4. A storm water treatment device according to claim 3, A storm water treatment device further comprising a plurality of vertical vanes, said vertical vanes extending from ends of said horizontal vanes.

5. The storm water treatment device according to claim 1, A storm water treatment device, wherein the enhanced sedimentation device comprises a plurality of tubes, each tube being angled from the wall toward the vertical baffle.

6. The storm water treatment device according to claim 1, The enhanced sedimentation device comprises a plurality of tubes, a first subset of the plurality of tubes being oriented at a first angle relative to the horizontal, and a second subset of the plurality of tubes being oriented at a second angle relative to the horizontal.

7. The storm water treatment device according to claim 1, A storm water treatment device, wherein a top of the enhanced settling device is below a lower surface of the outlet control diverter.

8. The storm water treatment device according to claim 1, A storm water treatment device, wherein storm water having a flow rate above a certain value flows over said vertical baffle.

9. The storm water treatment device according to claim 1, A storm water treatment device, wherein the outlet control diverter includes a bottom piece and two vertical side pieces, and an opening for receiving storm water is defined by the bottom piece, one of the vertical side pieces and the wall.

10. The storm water treatment device according to claim 1, A storm water treatment device, wherein the change in flow direction optimizes the time the storm water spends in the chamber.

11. The storm water treatment device according to claim 1, A storm water treatment device, wherein the chamber is cylindrical.

12. The storm water treatment device according to claim 1, A storm water treatment device, wherein the chamber is rectangular.

13. 1. A method for removing suspended contaminants from storm water, comprising the steps of: receiving storm water containing suspended contaminants at an inlet of a storm water treatment device, the storm water flowing into the inlet side of the storm water treatment device causing a flow velocity of the storm water to decrease; receiving the storm water into a lower portion of the storm water treatment device; receiving the stormwater from the lower portion into an enhanced sedimentation device, the stormwater being redirected up the enhanced sedimentation device and into an upper portion of the chamber on the outlet side of the chamber; receiving the storm water from the upper portion at an outlet control diverter, the storm water being redirected so as to be received by the outlet control diverter; and discharging the storm water at an outlet.

14. 14. The method of claim 13, The method of claim 1, wherein the enhanced sedimentation device comprises a plurality of tubes, each tube being disposed at an angle from an outer wall of the storm water treatment device.

15. 14. The method of claim 13, The enhanced sedimentation device comprises a plurality of tubes, a first subset of the plurality of tubes being positioned at a first angle relative to the horizontal, and a second subset of the plurality of tubes being positioned at a second angle relative to the horizontal.

16. 14. The method of claim 13, A method, wherein a top of the enhanced sedimentation device is below a lower surface of the outlet control divider.

17. 14. The method of claim 13, A method in which stormwater having a flow rate above a certain value flows over the vertical baffle.

18. 14. The method of claim 13, The outlet control diverter comprises a bottom piece and two vertical side pieces, and an opening for receiving storm water is defined by the bottom piece, one of the vertical side pieces and an outer wall of the storm water treatment device.

19. 14. The method of claim 13, The method, wherein the change in flow direction optimizes the time the storm water spends in the chamber.

20. 14. The method of claim 13, The method wherein the chamber is cylindrical.

21. 14. The method of claim 13, The method wherein the chamber is rectangular.

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