Stormwater treatment device and method

Abstract

A stormwater treatment device may include a chamber having a floor and walls, an inlet formed in the wall for receiving stormwater into an inlet side of the chamber, an outlet formed in the wall for discharging stormwater from an outlet side of the chamber, an enhanced settling device 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, where 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 an 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.

Description

[Technical field]

[0001]

[0001] This disclosure relates generally to systems, methods, and devices for removing contaminants from storm water. [Background technology]

[0002]

[0002] When it rains, stormwater travels over a variety of surfaces before reaching a sewer system. Along its path, it picks up and suspends contaminants, both natural and man-made, and carries the contaminants to the sewer system. The sewer system provides the first opportunity to remove some of these contaminants from the stormwater before it continues its path into a water body. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE DISCLOSURE

[0003] Systems, methods, and devices for removing contaminants from storm water are disclosed. [Means for solving the problem]

[0004] According to one embodiment, a storm water treatment device includes a chamber having a floor and walls, an inlet formed in the wall for receiving storm water into an inlet side of the chamber, an outlet formed in the wall for discharging storm water from an outlet side of the chamber, a vertical baffle dividing at least a portion of the chamber into an inlet side and an outlet side, the inlet side and the outlet side being in fluid communication with each other, a reinforced settling device disposed within the outlet side of the chamber, a portion of the chamber below a bottom of the reinforced settling device defines a lower portion of the chamber and a portion of the chamber above a top of the reinforced settling device defines an upper portion of the chamber, a flow divider plate within the lower portion of the chamber, and an outlet control divider disposed adjacent to the outlet, wherein the storm water 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 settling device to the upper portion of the chamber in a third flow direction, flow through the outlet control divider in a fourth flow direction, and discharged by the outlet in a fifth flow direction.

[0005] In one embodiment, the storm water treatment device may further include one or more vanes disposed on the vertical baffle, the vanes extending toward the inlet side of the chamber.

[0006] In one embodiment, a horizontal vane may be disposed on the vertical baffle and extend to the inlet side of the chamber, and a plurality of vertical vanes may be provided, the vertical vanes extending from the ends of the horizontal vanes.

[0007] In one embodiment, the enhanced sedimentation device may include a plurality of tubes, each of which may be disposed at an angle from the wall toward the vertical baffle, in one embodiment, the angle may be different for each tube, different for multiple tubes, etc.

[0008]

[0008] In one embodiment, the enhanced sedimentation separation device may include a plurality of tubes, wherein a first subset of the plurality of tubes is positioned at a first angle relative to the horizontal, and a second subset of the plurality of tubes is positioned at a second angle relative to the horizontal.

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

[0010] In one embodiment, storm water having a flow rate above a certain value flows over a vertical baffle.

[0011]

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

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

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

[0014]

[0014] According to another embodiment, a method for removing suspended contaminants from stormwater may include the steps of: (1) receiving stormwater containing suspended contaminants at an inlet of a stormwater treatment device, where the stormwater flows into the inlet side of the stormwater treatment device and the fluid velocity of the stormwater decreases; (2) receiving the stormwater into a lower portion of the stormwater treatment device; (3) receiving the stormwater from the lower portion into an enhanced settling device, where the stormwater is redirected down the enhanced settling device to flow into an upper portion of the chamber on the outlet side of the ascending chamber; (4) receiving the stormwater from the upper portion into an outlet control diverter, where the stormwater is redirected to be received by the outlet control diverter; and (5) discharging the stormwater at an outlet.

[0015]

[0015] In one embodiment, the enhanced sedimentation separation device may include a plurality of tubes, wherein a first subset of the plurality of tubes is positioned at a first angle relative to the horizontal, and a second subset of the plurality of tubes is positioned at a second angle relative to the horizontal.

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

[0017] In one embodiment, stormwater having a flow rate above a certain value flows over a vertical baffle into an upper portion of the stormwater treatment device.

[0018]

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

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

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

[0021]

[0021] According to another embodiment, a system for removing contaminants from storm water includes 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; an inlet in one wall for receiving contaminated storm water and an outlet in the wall for discharging treated storm water; and a vertical baffle within the chamber, the vertical baffle being perpendicular to a vertical plane that bisects the inlet and divides the chamber into an inlet side and an outlet side, the outlet side being connected to the baffle. and the outlet opening, the inlet side being between the baffle and the inlet opening, the two sides being in fluid communication; a stack of lamella tubes disposed within the outlet side, the long axis of each tube being at an angle to the horizontal approximately perpendicular to a vertical plane that bisects the inlet, the top of the stack of tubes being at least 6 inches (15.24 cm) below the outlet invert; one or more flow divider plates attached to the wall of the chamber on the outlet side below the stack of lamella tubes; and a flow divider located at the approach to the outlet.

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

[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] In one embodiment, the top of the vertical baffle is at a level above the invert of the inlet pipe so that at flow rates above the design flow rate, water will flow over the top of the vertical baffle.

[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] In one embodiment, the vertical baffle may have one or more vanes extending perpendicularly from the baffle towards the inlet.

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

[0028] In one embodiment, at least two vanes are located 3 to 6 inches (7.62 to 15.24 cm) from the point where the baffle meets the vessel wall on each side of the baffle, and such vane placement is symmetrical about a vertical plane that bisects the inlet.

[0029] In one embodiment, the long axis of each tube is at an angle of 50 to 70 degrees from the horizontal, the direction of the angle being between 45 and 135 degrees relative to a vertical plane that bisects the inlet.

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

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

[0032] In one embodiment, the sagitta of each flow divider plate may be between 3 and 14 inches (7.62 and 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 protruding from one side of the outlet opening parallel to a vertical plane bisecting the outlet, and the second vertical side piece being substantially perpendicular to the first vertical side piece and parallel to a tangent to the chamber wall at the midpoint of the outlet, the bottom piece and the two vertical side pieces forming an opening through which water can reach the outlet opening.

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

[0035] In one embodiment, the outlet flow 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 flow 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, such that water flowing through the tube must reverse direction at least twice to enter the diverter opening.

[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] For a more complete understanding of the present disclosure, its objects and advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which: [Brief description of the drawings]

[0039] [Figure 1]1 illustrates an isometric view of a storm water treatment device according to an embodiment. [Figure 2A] 1 illustrates an exemplary vane implementation according to an embodiment. [Figure 2B] 1 illustrates an exemplary vane implementation according to an embodiment. [Diagram 3] 2 illustrates a side elevation view of the storm water treatment device of FIG. 1 according to an embodiment. [Figure 4] 2 illustrates a front elevation view of the storm water treatment device of FIG. 1 according to an embodiment. [Diagram 5] 1 illustrates a plan view of first, second, and third flow dividers according to an embodiment. [Figure 6] 2 illustrates a top view of the storm water treatment device of FIG. 1 according to an embodiment. [Figure 7] 1 illustrates a cross-sectional view of a lamella tube according to one embodiment. [Figure 8] 1 illustrates a side view of a lamella tube according to one embodiment. [Figure 9] 1 depicts an isometric view of a storm water treatment device according to another embodiment. [Figure 10] 10 illustrates a side view of the inside of an inner chamber of a storm water treatment device according to the embodiment of FIG. 9. [Figure 11] 1 depicts a method for removing contaminants from storm water, according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040]

[0050] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0004] Embodiments are directed to a system for removing contaminants from storm water. Referring to Figures 1-8, diagrams of a storm water treatment device according to an embodiment are provided.

[0041]

[0051] The stormwater treatment device 100 may define a chamber including an inlet 105, an outlet 110, a wall 115, a vertical baffle 120, one or more diverters 130, and an outlet control diverter 135. In one embodiment, stormwater carrying pollutants may enter the inlet 105 and flow to a lower portion 150 of the stormwater treatment device 100. In one embodiment, depending on the inflow velocity of the stormwater, the stormwater may hit the vertical baffle 120, slow down, and flow 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 in the enhanced sedimentation device 125 and having openings that allow cleaning and inspection. A shorter distance may improve performance but may make cleaning and inspection more difficult. Additionally, a shorter distance may increase scouring.

[0043]

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

[0044]

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

[0045]

[0055] In one embodiment, the bottom of the vertical baffle 120 is positioned to optimize the flow of water within the lower portion 150 of the storm water treatment device 100 and may be positioned depending on the size of the storm water 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 storm water treatment device 100. Other mounting locations may be used as needed and / or desired.

[0046]

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

[0047]

[0057] In embodiments, the enhanced sedimentation device 125 may comprise multiple sheets, each formed with angled ridges. In one embodiment, the sheets may be oriented such that the ridges of adjacent sheets are parallel to each other, forming a tube that is angled relative to the vertical. In another embodiment, the sheets may be oriented such that the ridges of adjacent sheets are perpendicular to each other, creating a series of serpentine paths.

[0048]

[0058] In one embodiment, the bottom of the enhanced sedimentation 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 storm water treatment device 100 to divert the flow of raw storm water so that suspended contaminants have more time to fall out of suspension. In one embodiment, the diverters 130, 131, and / or 132 may also prevent the incoming raw storm water from resuspending contaminants.

[0050]

[0060] In one embodiment, the flow splitters 130, 131, and / or 132 may be plates. In one embodiment, the plates may be flat. In one embodiment, the second flow splitter (131) may be attached to the wall 115 at the angle of the lamella tube such that the centerline of the second flow splitter coincides with the centerline of the wall 115. The third flow splitter 132 may be attached to the wall 115 opposite the second flow splitter 131 such that the centerline of the third flow splitter coincides with the centerline of the wall 115. Two or more of the flow splitters may be manufactured as a single piece. The sagitta of each flow splitter may be between 3 inches (7.62 cm) and 30% of the distance to the opposite wall or baffle. For example, a 48 inch (121.92 cm) diameter tank would have an upper limit of 14 inches (35.56 cm).

[0051]

[0061] The outlet control diverter 135 will further throttle the flow of the storm water before it can exit the outlet 110. In one embodiment, the outlet control diverter may prevent the storm water from flowing directly from the lower section 150 to the upper section 155 and out the outlet 110 without changing flow direction. The outlet control diverter 135 will also cause suspended contaminants to fall out of suspension.

[0052]

[0062] The outlet control diverter 135 may be flat and attached to the wall 115 below the outlet 110 such that the plate of the outlet control diverter 135 has the same centerline as the outlet 110 and the outlet control diverter 135 forms an angle of 45 to 135 degrees from the horizontal.

[0053]

[0063] The outlet control diverter 135 may include a horizontal bottom piece and two vertical side pieces that are the same height as the invert of the outlet 110. The first vertical side piece may protrude from one side of the outlet 110 and be substantially parallel to a vertical plane that bisects the outlet 110. The second vertical side piece may be substantially perpendicular to the first vertical side piece and parallel to a tangent to the wall 115 taken at the centerline 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 protrude at least 4 inches (10.16 cm) from the horizontal side piece.

[0054]

[0064] The dimensions of the outlet control diverter 135 and its portions may vary based on the size of the storm water treatment device 100, but in one embodiment, the first vertical side piece may extend 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 will vary depending on the size of the storm water 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 approximating the size of the outlet 110.

[0055]

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

[0056]

[0066] 7 and 8, exemplary details regarding the enhanced sedimentation device 125 are provided according to embodiments. The enhanced sedimentation device 125 may include a plurality of lamella tubes. The lamella tubes may have any suitable shape, and in one embodiment, as shown in FIG. 7, the lamella tubes may have a hexagonal shape. Other tube shapes such as rectangular, parallelogram, circular, etc. may 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 device 125 may be positioned at an angle from the horizontal. In one embodiment, water flowing through the enhanced sedimentation device 125 must reverse direction at least twice to enter the opening of the outlet control diverter 135. For example, storm water reverses direction as it travels from the lower section 150 to the upper section 155 through the enhanced sedimentation device 125, and reverses direction again as it travels from the enhanced sedimentation device 125 to the outlet 110. The outlet diverter 135 would force yet another change of direction.

[0058]

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

[0059]

[0069] In one embodiment, the lamella tubes of the enhanced sedimentation device 125 may be disposed at different angles relative to the horizontal. For example, a first subset of the lamella tubes may be disposed at a first angle relative to the horizontal, a second subset of the lamella tubes may be disposed at a second angle relative to the horizontal, etc. The angle(s) may be selected as needed and / or desired.

[0060]

[0070] 2A, the vertical baffle 120 may include one or more vanes 140 extending down from the top of the vertical baffle 120 at the inlet side to help prevent vortex formation in the inlet flow. For example, the vanes 140 may extend 12-36 inches (30.48-91.44 cm) below the top of the vertical baffle 120 and 1-5 inches (2.54-12.7 cm) away from the baffle. The dimensions of the vanes 140 may vary depending on the size of the storm water treatment device 100. In one embodiment, at least one vane 140 may be positioned at least 3 inches (7.62 cm) from the point where the baffle 120 meets the wall of the storm water treatment device 100, and the other vane 140 may be positioned at least 3 inches (7.62 cm) from the point where the other side of the baffle 120 meets the wall of the storm water treatment device 100. Any arrangement of the vanes 140 may be symmetrical about a vertical plane that bisects the vertical baffle 120 and 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 stormwater treatment device 100 may be configured to redirect the flow of water within the stormwater treatment device 100 several times. The purpose of the redirection is to optimize the time the stormwater spends within the stormwater treatment device 100. This redirection uses the volume within the stormwater treatment device 100 as efficiently as possible, since gravity settling takes time and the dimensions of the stormwater treatment device 100 may limit the volume and flow rate.

[0063]

[0073] 9 and 10, isometric and cross-sectional views, respectively, of a stormwater treatment device according to another embodiment are provided. The stormwater 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, stormwater carrying pollutants may enter the inlet 905 and fall into the outer chamber 950 of the stormwater treatment device 900. The stormwater may then flow through the enhanced sedimentation device 925 into the inner chamber 955 of the stormwater treatment device 900 before exiting via the outlet 910.

[0064]

[0074] It should be appreciated that in an alternative embodiment, the enhanced sedimentation device 925 may be located within an outer chamber 950 of the stormwater treatment device, with the stormwater being provided to the inner chamber 965 of the stormwater treatment device 900 via the inlet 905. An outlet 910 is located in the outer chamber 950, such that once the stormwater has flowed through the enhanced sedimentation device 925, it exits the stormwater treatment device 900 via the outlet 910.

[0065]

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

[0066]

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

[0067]

[0077] In step 1105, storm water carrying pollutants flows into the inlet side of the storm water treatment device and spreads out, reducing the fluid velocity.

[0068]

[0078] In step 1110, the stormwater flows into a lower portion of the stormwater treatment device unless the flow exceeds a particular design flow rate. For example, if the flow is above a particular design flow rate, an amount of the stormwater proportional to the amount of flow above the particular design flow rate will flow over the baffle directly into the upper portion of the stormwater treatment device, while the remainder of the flow will flow into the lower portion of the stormwater treatment device.

[0069]

[0079] In step 1115, the storm water flows into the lower section and the contaminants are released from suspension due to gravitational settling. The settled contaminants accumulate within the lower section of the storm water treatment device.

[0070]

[0080] In step 1120, the stormwater changes direction and flows up an enhanced settling device, such as a lamella tube. These tubes provide a shorter settling distance, decreasing the time it takes for particles to settle. This allows smaller particles to settle more quickly. The particles that settle in the enhanced settling device eventually fall into the lower portion of the stormwater treatment device.

[0071]

[0081] In step 1125, the stormwater exits the enhanced sedimentation device and changes direction in an upper portion of the stormwater treatment device.

[0072]

[0082] At step 1130, the storm water reaches the outlet diverter and is allowed to flow out through the outlet. In one embodiment, the outlet diverter may be configured to redirect the storm water again before it exits through the outlet.

[0073]

[0083] It will be appreciated by those skilled in the art that the present invention is not limited to what has been particularly shown and described above. Rather, the scope of the present invention includes both combinations and subcombinations of the features described above, as well as variations and modifications thereof not found in the prior art. It is further to be appreciated that these embodiments are not mutually exclusive.

[0074]

[0084] As will be readily appreciated by those skilled in the art, the embodiments disclosed herein are susceptible of wide utility and application. Numerous embodiments and adaptations of the invention other than those described herein, as well as numerous variations, modifications, and equivalent arrangements, will become apparent or reasonably suggested from the invention and the foregoing description of the invention without departing from the spirit or scope of the invention.

[0075]

[0085] Thus, while the invention has been described in detail herein with reference to exemplary embodiments thereof, it should be understood that the disclosure is for illustrative purposes and is merely exemplary of the invention, and is made to provide an enabling disclosure of the invention. Accordingly, the foregoing disclosure is not intended to be interpreted or to limit the invention, nor is it intended to exclude any other such embodiments, adaptations, variations, modifications, or equivalent arrangements. [Aspect 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 stormwater treatment device, wherein 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 in a fourth flow direction, and is discharged by the outlet in a fifth flow direction. [Aspect 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. [Aspect 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. Aspect 4 A storm water treatment device according to aspect 3, comprising: A storm water treatment device further comprising a plurality of vertical vanes, said vertical vanes extending from ends of said horizontal vanes. Aspect 5 In the storm water treatment device according to aspect 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. Aspect 6 In the storm water treatment device according to aspect 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. Aspect 7 In the storm water treatment device according to aspect 1, A storm water treatment device, wherein a top of the enhanced settling device is below a lower surface of the outlet control diverter. Aspect 8 In the storm water treatment device according to aspect 1, A storm water treatment device, wherein storm water having a flow rate above a certain value flows over said vertical baffle. Aspect 9 In the storm water treatment device according to aspect 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. Aspect 10 In the storm water treatment device according to aspect 1, A storm water treatment device, wherein the change in flow direction optimizes the time the storm water spends in the chamber. Aspect 11 In the storm water treatment device according to aspect 1, A storm water treatment device, wherein the chamber is cylindrical. Aspect 12 In the storm water treatment device according to aspect 1, A storm water treatment device, wherein the chamber is rectangular. Aspect 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. Aspect 14 In the method according to embodiment 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. Aspect 15 In the method according to embodiment 13, 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. Aspect 16 In the method according to embodiment 13, A method, wherein a top of the enhanced sedimentation device is below a lower surface of the outlet control diverter. Aspect 17 In the method according to embodiment 13, A method in which stormwater having a flow rate above a certain value flows over the vertical baffle. Aspect 18 In the method according to embodiment 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. Aspect 19 In the method according to embodiment 13, The method, wherein the change in flow direction optimizes the time the storm water spends in the chamber. Aspect 20 In the method according to embodiment 13, The method wherein the chamber is cylindrical. Aspect 21 In the method according to embodiment 13, The method wherein the chamber is rectangular. [Explanation of symbols]

[0076] 100 Rainwater treatment device 105 Entrance 110 Exit 115 Wall 120 Vertical Baffle 125 Enhanced Sedimentation Device 130, 131, 132 flow divider 135 Outlet Control Diverter 140 Feather 150 lower part 155 Upper part 900 Rainwater treatment device 905 Entrance 910 Exit 915 Wall 925 Enhanced Sedimentation 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, providing a first plurality of water channels extending from the lower portion of the chamber to the upper portion of the chamber at a first angle relative to the horizontal and a second plurality of water channels extending from the lower portion of the chamber to the upper portion of the chamber at a second angle relative to the horizontal; a flow distributor in a lower portion of the chamber; 1. A storm water treatment device comprising: an outlet control diverter disposed proximate to the outlet, the outlet control diverter having a bottom piece and two vertical side pieces, an opening for receiving storm water into the outlet control diverter defined by the bottom piece, one of the vertical side pieces and the wall; 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. The storm water treatment device according to claim 1, A storm water treatment device, wherein each of the first plurality of waterways and the second plurality of waterways is provided by a pipe.

5. 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.

6. The storm water treatment device according to claim 1, A storm water treatment device, wherein the vertical baffle is configured such that storm water having a flow rate above a certain value flows from the inlet side over the vertical baffle to the outlet side.

7. The storm water treatment device according to claim 1, The vertical baffle between the inlet and the outlet is configured to force the flow to take a longer and narrower path between the inlet side and the outlet side, increasing the time the storm water spends in the chamber.

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

9. 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; a horizontal vane disposed on the vertical baffle and extending toward the inlet side of the chamber; a plurality of vertical vanes extending from the ends of the horizontal vanes; 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.

10. The storm water treatment device according to claim 9, a plurality of substantially vertical vanes disposed on the vertical baffle; The plurality of substantially vertical vanes extend toward the inlet side of the chamber.

11. The storm water treatment device according to claim 9, The enhanced sedimentation device comprises a plurality of tubes; A storm water treatment device, wherein each pipe provides a water passage from a lower portion of the chamber to the upper portion of the chamber.

12. The storm water treatment device according to claim 9, The enhanced sedimentation device comprises a plurality of tubes, a first subset of the plurality of tubes being disposed at a first angle relative to the horizontal, and a second subset of the plurality of tubes being disposed at a second angle relative to the horizontal.

13. The storm water treatment device according to claim 9, A storm water treatment device, wherein the difference in flow direction optimizes the time the storm water spends in the chamber.

14. 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 having a chamber with a floor and walls, 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 storm water from the lower portion into an enhanced sedimentation device, the storm water being redirected up the enhanced sedimentation device and into an upper portion of the chamber on an outlet side of the chamber, the enhanced sedimentation device providing a first plurality of water channels extending from the lower portion of the chamber to the upper portion of the chamber at a first angle relative to the horizontal and a second plurality of water channels extending from the lower portion of the chamber to the upper portion of the chamber at a second angle relative to the horizontal; receiving the storm water from the upper portion into an outlet control diverter, the outlet control diverter having a bottom piece and two vertical side pieces, an opening for receiving the storm water into the outlet control diverter defined by the bottom piece, one of the vertical side pieces and the wall, and redirecting the storm water to be received by the outlet control diverter; and discharging the rainwater at an outlet. The method, wherein stormwater having a flow rate above a certain value flows over the vertical baffle between the inlet side and the outlet side.

15. 15. The method of claim 14, The method, wherein each of the first plurality of water passages and the second plurality of water passages is provided by a tube.

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

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

18. 15. The method of claim 14, The method wherein the chamber is cylindrical.

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