AC / DC precipitation device and method of use

Abstract

The rainwater treatment device may include a direct-current sedimentation device having a treatment channel defined by a pair of angled plates provided at a supplementary angle between the angled plates and disposed between a front baffle and a rear baffle. The front baffle has a treatment channel opening, and the rear baffle has a treatment channel outlet. Under normal flow rates, rainwater flows in a direct-current pattern into the inlet, then into the inlet chamber, through the treatment channel opening into the treatment channel, through the treatment channel outlet into the outlet chamber, and deposits are dropped from the suspension through an opening at the bottom of the pair of angled plates and out of the direct-current sedimentation device.

Description

Technical Field

[0001]

[0001] This disclosure generally relates to AC / DC sedimentation devices and methods of use.

Background Art

[0002]

[0002] When it rains, rainwater moves across various surfaces before reaching the sewer. Along its path, rainwater picks up and floats contaminants (both natural and artificial) 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

[0003]

[0003] An AC / DC sedimentation device and method of use are disclosed.

[0004]

[0004] According to an embodiment, a rainwater treatment device includes a housing having a floor and a wall, an inlet formed in a wall in the inlet chamber of the housing for receiving rainwater containing suspended sediment, the inlet chamber being defined by a first portion of the wall and a front baffle that extends vertically from the floor of the housing, an outlet formed in a wall that discharges rainwater from the outlet chamber of the housing, the outlet chamber being defined by a rear baffle, a second portion of the wall, and a short-circuit prevention plate, and a treatment chamber and a sedimentation storage area, the treatment chamber and the sedimentation storage area being defined by the front baffle, a third portion of the wall, the rear baffle, and the short-circuit prevention plate, and having a direct and alternating current sedimentation device disposed therein, the direct and alternating current sedimentation device having treatment channels defined by the front baffle, the rear baffle, and a first pair of angled plates disposed on a first side of the center line of the housing and a second pair of angled plates disposed on a second side of the center line, the first pair of angled plates and the second pair of angled plates being provided at complementary angles between the angled plates, the first pair of angled plates and the second pair of angled plates being disposed between the front baffle and the rear baffle, the front baffle having treatment channel openings, and the rear baffle having treatment channel outlets. Under normal flow rates, rainwater flows into the inlet, then into the inlet chamber, into the treatment channels through the treatment channel openings, and into the outlet chamber through the treatment channel outlets, and the rainwater flows in a direct and alternating current pattern, causing sediment to drop from the suspension through openings at the bottom of the pairs of angled plates and out of the direct and alternating current sedimentation device.

[0005]

[0005] In one embodiment, the rainwater treatment device may include a bypass channel having an inlet weir, an outlet weir, and a pair of bypass channel walls, the height of the upper portion of the inlet weir being the same as the height of the notch of the outlet weir between the bypass channel walls, but lower than the height of the upper portion of the outlet weir outside the bypass channel and lower than the height of the bypass channel walls, the bypass channel receiving flow that exceeds the inlet weir when the flow rate exceeds a limit, thereby bypassing the treatment chamber and the sedimentation storage area.

[0006]

[0006] In one embodiment, at high flow rates, rainwater overflows the inlet weir and enters the bypass channel, passes over the notch in the outlet weir, enters the outlet chamber, and exits the housing through the outlet or flows into the suspended solids retention zone between the bypass channel wall and the third portion of the wall.

[0007]

[0007] In one embodiment, the complementary angles may be between about 45 / 145 degrees and about 65 / 115 degrees.

[0008]

[0008] In one embodiment, the width of each plate may be shorter than the length of the plate.

[0009]

[0009] In one embodiment, the spacing between pairs of plates may be between 2.54 cm (1 inch) and 10.16 cm (4 inches).

[0010] According to another embodiment, a method for removing suspended sediment from rainwater is as follows: (1) receiving rainwater containing suspended sediment at an inlet in the wall of a rainwater treatment device having a housing with a floor and walls, the rainwater flowing into an inlet chamber defined by a first portion of the wall and a front baffle, the front baffle extending vertically from the floor of the housing; (2) receiving, in a treatment chamber, rainwater containing suspended sediment, the treatment chamber being defined by the front baffle, a second portion of the wall, a rear baffle, and a bypass prevention plate and having a direct and alternating current sedimentation device disposed therein; (3) receiving, by a direct and alternating current sedimentation device, rainwater containing suspended sediment, the direct and alternating current sedimentation device having treatment channels defined by the front baffle, the rear baffle, a first pair of angled plates disposed on a first side of the centerline of the housing, and a second pair of angled plates disposed on a second side of the centerline, the first pair of angled plates and the second pair of angled plates being provided at a supplementary angle between the angled plates, the first pair of angled plates and the second pair of angled plates being disposed between the front baffle and the rear baffle, the front baffle having a treatment channel opening, and the rear baffle having a treatment channel outlet; (4) flowing the rainwater in a direct and alternating current pattern by the direct and alternating current sedimentation device and, under normal flow rates, dropping the sediment from the suspension through an opening at the lower part of the pair of angled plates and out of the direct and alternating current sedimentation device; (5) receiving, in an outlet chamber defined by the rear baffle, a second portion of the wall, and a short-circuit prevention plate, rainwater with a portion of the sediment removed; and (6) discharging the rainwater with the sediment removed through an outlet in a third portion of the wall.

[0011]

[0011] In one embodiment, the method may include receiving rainwater with sediment into a bypass channel under high flow rates. The bypass channel comprises an inlet weir, an outlet weir, and a pair of bypass channel walls. The height of the upper part of the inlet weir is the same as the height of the upper part of the notch in the outlet weir, and is lower than the height of the upper part in the outlet weir and the upper part of the bypass channel walls. When the flow rate exceeds the limit, the bypass channel receives the flow over the inlet weir, thereby bypassing the treatment chamber and the sediment storage area. The rainwater with sediment flows over the inlet weir, into the bypass channel, over the notch in the outlet weir, into the outlet chamber, and out of the housing through the outlet. In one embodiment, under high flow rates, a portion of the rainwater flows over the inlet weir and into the suspended matter holding zone between the bypass channel wall and the third part of the wall.

[0012]

[0012] In one embodiment, the suspended matter may be held within the suspended matter holding zone.

[0013]

[0013] In one embodiment, under very high flow rates, the suspended matter may overflow from the outlet weir and the bypass channel wall and enter the outlet chamber.

[0014]

[0014] In one embodiment, the complementary angle may be between about 45 / 145 degrees and about 65 / 115 degrees.

[0015]

[0015] In one embodiment, the width of each plate may be shorter than the length of the plate.

[0016]

[0016] In one embodiment, the distance between the pair of plates may be between 2.54 cm (1 inch) and 10.16 cm (4 inches).

[0017]

[0017] In one embodiment, the water treatment device may receive water such as rainwater containing suspended sediment into the inlet chamber. The inlet chamber may include one or more flow diverters that direct all flow up to a specified treatment flow rate into the treatment zone of the treatment chamber. The water may then flow to the treatment zone of the treatment chamber, which may include a cross-flow device. The cross-flow device may include one or more pairs of parallel plates that are at complementary angles, for example, between about 45 / 135 degrees and about 65 / 115 degrees, with a certain spacing between the upper portions of the plates. The plates are suspended and held between two opposed and spaced-apart substantially vertical weirs. The water flows across the plates in a cross-flow pattern and the water may exit the treatment chamber and enter the outlet chamber.

[0018]

[0018] In one embodiment, the plates may have an axis of symmetry between the plates that is parallel to the length of the plates.

[0019]

[0019] In one embodiment, the length of the plates may be about 121.92 cm (4 feet) or more, the width of the plates may be shorter than the length of the plates, and the spacing between the plates may be between about 2.54 cm (1 inch) and 10.16 cm (4 inches).

[0020]

[0020] In one embodiment, water in excess of the design flow rate passes through the inlet chamber and over the top of the treatment chamber. The treatment chamber includes a weir system designed to retain suspended material in the flow that exceeds the treatment flow rate and is less than the excess bypass flow rate. The weir may form a central trough, for example, about 60.96 - 91.44 cm (2 - 3 feet), and a wall may be provided between the treatment chamber and the outlet chamber that extends to the width on the outlet side. The upper portion of the weir may be at least about 45.72 cm (18 inches) higher than the upper portion of the inclined plate, for example. Notches may be provided in the weir on the inlet and outlet sides of the trough, and the notches may be lower than the upper portion beside the trough and the wall on the outlet side. The water may enter the trough and be carried directly to the outlet chamber in a flow that is greater than the design treatment flow rate but less than the excess bypass flow rate.

[0021]

[0021] In one embodiment, the captured sediment may be stored on the floor of the chamber. A baffle may be provided between the inlet chamber and the processing chamber, and the baffle may extend from the lower part of the inclined plate to the floor of the vault, thereby preventing the stored sediment from moving from the inlet chamber to the processing chamber. A second baffle may extend between the sediment chamber and the outlet chamber to the floor of the vault or the rear wall of the chamber, thereby preventing the stored sediment from moving from the processing chamber to the outlet chamber.

[0022]

[0022] According to another embodiment, the separator assembly may include an inclined cell separator having a plurality of rectangular plates positioned between opposing and spaced-apart substantially vertical weirs, the plates having opposing elongated upper and lower edges and front and rear surfaces between the upper and lower edges, the plates having an inclined orientation with respect to a vertical axis, the plates being arranged in pairs at complementary angles, the plates having a symmetry axis between the plates parallel to the length of the plates, the inclined orientation forming angled cells between a plurality of adjacent plates, the weirs comprising an inlet weir and an outlet weir that are substantially parallel to each other, the inlet and outlet weirs having opposing upper and lower edges and front and rear surfaces between the upper and lower edges; The inclined cell separator is located within a chamber formed by opposing end walls, opposing side walls, an upper portion, and a lower portion, the opposing end walls comprising an inlet wall having an inlet opening therein and an outlet wall having an outlet opening therein, the inlet and outlet weirs extending between the opposing side walls of the chamber; an inlet chamber between the inlet wall and the inlet weir; an outlet chamber between the outlet weir and the outlet wall; and a sediment collection area along the lower portion of the chamber under the inclined cell separator and between the inlet chamber and the outlet chamber.

[0023]

[0023] In one embodiment, the inclined plates may be arranged in pairs at complementary angles between about 45 / 135 degrees and between about 65 / 115 degrees with a space between the upper portions of the plates of at least about 10.16 cm (4 inches).

[0024]

[0024] In one embodiment, the length of the plate in the flow direction may be about 121.92 cm (4 feet) or more, the width of the plate may be shorter than the length of the plate, and the spacing between the plates may be between about 2.54 cm (1 inch) and 10.16 cm (4 inches).

[0025]

[0025] In one embodiment, the lower edge of the first weir may extend to the bottom of the chamber, a portion of the upper edge of the weir may be at the same level as the upper part of the cell separator, and a portion of the first weir may form a tab that extends a certain distance beyond the upper part of the cell separator.

[0026]

[0026] In one embodiment, the upper part of the cell separator may be substantially at the same level as the invert of the inlet opening and the outlet opening.

[0027]

[0027] In one embodiment, the two substantially parallel plates may extend from beside the tab in the first weir to the notch in the second weir. The upper edges of these walls may extend to the upper part of the second weir, and these walls define an overflow path from the tab in the first weir to the notch in the second weir.

[0028]

[0028] For a more complete understanding of the objects and advantages of the present disclosure, reference is now made to the following description taken in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0029]

Figure 1

[0029] FIG. 1 is a first isometric view of a water treatment device including a direct and alternating current precipitation device according to an embodiment.

Figure 2

[0030] FIG. 2 is a second isometric view of a water treatment device including a direct and alternating current precipitation device according to an embodiment.

Figure 3

[0031] FIG. 3 is a side view of the water treatment device of FIGS. 1 and 2.

Figure 4

[0032] Side views of the water treatment devices of FIGS. 1 and 2.

Figure 5

[0033] Isometric view of a direct and alternating current sedimentation device according to an embodiment.

Figure 6

[0034] A diagram showing a method of treating water using a water treatment device including a direct and alternating current sedimentation device according to an embodiment.

Figure 7

[0035] A diagram showing a method for bypassing a direct and alternating current sedimentation device, disclosed according to one embodiment.

DETAILED DESCRIPTION OF THE INVENTION

[0030]

[0036] Embodiments are directed to direct and alternating current sedimentation devices and methods of use. Embodiments may use a short distance for sediment to fall as the direct and alternating current pattern of rainwater removes sediment and the sediment exits the suspension. For example, the sediment only needs to fall onto the surface of the plate.

[0031]

[0037] FIGS. 1-5 show diagrams of a water treatment device including a direct and alternating current sedimentation device according to an embodiment. The treatment device 100 may include a housing 105. The housing 105 may include, for example, an inlet 110 that may receive rainwater having suspended sediment and an outlet 115 that may output the rainwater. The water received at the inlet 110 may flow into the inlet chamber 170, may flow into the treatment chamber and sediment storage area 120, may flow into the outlet chamber 175, and may exit the treatment device 100 via the outlet 115.

[0032]

[0038] The treatment chamber and sediment storage area 120 may be defined by a front baffle 130, a rear baffle 125, and a short circuit prevention plate 165.

[0033]

[0039] The housing 105 may include a direct and alternating current sedimentation device including a plurality of pairs of angled plates 135 disposed between a front baffle 130 and a rear baffle 125. In one embodiment, two pairs of angled plates 135 may be provided, one pair on each side of the centerline of the housing 105. The pairs of angled plates 135 may be provided at complementary angles between the angled plates, for example, 45 / 135 degrees and 65 / 115 degrees, and a space may be provided between the upper portions of the pairs of angled plates 135. The pairs of angled plates 135 may be suspended and held between an inlet weir 140 and an outlet weir 145. A bypass channel wall 155 may be provided, and the bypass channel wall 155, together with the inlet weir 140 and the outlet weir 145, provides an area for holding floating matter (e.g., sediment or other materials floating on top of the water). The outlet weir 145 may include a notch 150 that may allow some water to flow into the outlet chamber 175.

[0034]

[0040] The upper portion of the inlet weir 140 and the upper portion of the notch 150 may have the same height and may allow for a normal flow bypass. The upper portion of the outlet weir 145 may be at a higher height to allow for a bypass in high flow situations. Some of the floating matter may go to the side and some may leak out.

[0035]

[0041] At higher flows, the floating matter may flow into the outlet chamber 175 with the water over the notch 150 and out of the processing device 100 through the outlet 115.

[0036]

[0042] Water with sediment enters a pair of treatment channel openings 190 within the front baffle 130, and the pair of treatment channel openings 190, together with a pair of angled plates 135 and a treatment channel outlet 160 within the rear baffle, create a treatment channel. The water within the treatment channel may flow between each pair of angled plates 135 with an alternating current pattern, and the alternating current pattern causes suspended sediment to settle through the sediment outlet 180 to the bottom of the treatment chamber and the sediment storage area 120. Water from which some sediment has been settled out of suspension may flow through the treatment channel outlet 160 into the outlet chamber 175.

[0037]

[0043] The housing 105 may further include a flow diverter 185 provided by the front baffle 130. In one embodiment, the flow diverter may be attached or otherwise fixed to the front baffle 130. The flow diverter 185 may move the flowing water from the inlet 110 alongside the front baffle 130 and into the treatment channel openings 190. The flow diverter 185 may assist in floating debris capture in that floating debris may be sent alongside and retained by the bypass channel walls.

[0038]

[0044] Referring to FIG. 6, a method for removing suspended sediment from rainwater is disclosed according to one embodiment.

[0039]

[0045] In step 605, rainwater carrying suspended sediment flows into the inlet chamber within the inlet side of the rainwater treatment device, where expansion is allowed such that the fluid velocity decreases.

[0040]

[0046] In step 610, under normal flow rates (e.g., within design limits), the water within the inlet chamber may flow into one or more treatment channel openings and into a treatment channel defined by a front baffle, a pair of parallel plates, and a treatment channel outlet within the rear baffle.

[0041]

[0047] In step 615, water flows through the treatment channel in an alternating current pattern, and suspended sediment settles from the suspension and enters the lower part of the treatment chamber and the sediment storage area. The sediment may descend from the treatment channel through the side openings between pairs of angled plates.

[0042]

[0048] In step 620, the treated water may flow out of the treatment channel and into the outlet chamber through the treatment channel opening in the rear baffle.

[0043]

[0049] In step 725, the treated water may flow out of the outlet chamber and the housing through an outlet such as a pipe.

[0044]

[0050] Referring to FIG. 7, a method for bypassing a direct current sedimentation device is disclosed according to an embodiment. For example, at high flow rates, the bypass channel and the suspended matter holding zone may be active, and the suspended matter may be held within the bypass suspended matter holding zone. At very high flow rates, however, the entire outlet weir may be overridden and all suspended matter may be washed away from the suspended matter holding zone.

[0045]

[0051] In step 705, water may enter the housing through an inlet and flow into the inlet chamber.

[0046]

[0052] In step 710, when the flow rate exceeds the design limit, water overruns the inlet weir and flows into the bypass channel and the two suspended matter holding zones. The bypass channel may be defined by the inlet weir, the bypass channel wall, and the outlet weir. The suspended matter holding zone is defined by the inlet weir, the outside of the bypass channel wall, the housing wall, and the outlet weir.

[0047]

[0053] In step 715, at high flow rates, water may flow through the bypass channel. Any suspended matter may be held within the suspended matter holding zone along with the water. Some water exits over the notch in the outlet weir and enters the outlet chamber.

[0048]

[0054] In step 720, water flows out of the bypass channel and into the outlet chamber by flowing over an outlet weir at the end of the bypass channel. At high flow rates, suspended matter in the bypass channel may flow over the notch with the water and enter the outlet chamber.

[0049]

[0055] In step 725, water may flow out of the outlet chamber and the housing through the outlet.

[0050]

[0056] It will be understood by those skilled in the art that the present invention is not limited by what has been particularly shown and described above. Rather, the scope of the present invention includes both combinations and sub - combinations of the features described above and variations and modifications thereof not found in the prior art. It should further be recognized that these embodiments are not mutually exclusive.

[0051]

[0057] It will be readily understood by those skilled in the art that the embodiments disclosed herein provide broad 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 from or be moderately suggested by the present invention and the foregoing description without departing from the essence or scope of the present invention.

[0052]

[0058] Accordingly, although the present invention has been described in detail herein in connection with its exemplary embodiments, it is understood that the present disclosure is merely illustrative and exemplary of the invention and is made for the purpose of providing a disclosure of the invention to the extent possible. Accordingly, the foregoing disclosure is not to be construed as limiting the invention or precluding any other such embodiments, adaptations, variations, modifications, or equivalent arrangements.

Claims

Claim 1 A rainwater treatment device, A housing having a floor and walls, An inlet formed in the wall for receiving rainwater containing suspended sediment in the inlet chamber of the housing, the inlet chamber being defined by a first portion of the wall and a front baffle, the front baffle extending vertically from the floor of the housing, and the inlet, An outlet formed in the wall for discharging rainwater from the outlet chamber of the housing, the outlet chamber being defined by a rear baffle, a second portion of the wall, and a short-circuit prevention plate, and the outlet, A treatment chamber and a sediment storage area, defined by the front baffle, a third portion of the wall, the rear baffle, and the short-circuit prevention plate, having a direct and alternating current sedimentation device disposed therein, the direct and alternating current sedimentation device having treatment channels defined by the front baffle, the rear baffle, and a first pair of angled plates disposed on a first side of the center line of the housing and a second pair of angled plates disposed on a second side of the center line, the first pair of angled plates and the second pair of angled plates being provided at a complementary angle between the angled plates, the first pair of angled plates and the second pair of angled plates being disposed between the front baffle and the rear baffle, the front baffle having a treatment channel opening, and the rear baffle having a treatment channel outlet, and a treatment chamber and a sediment storage area, Under normal flow rates, rainwater flows into the inlet, then into the inlet chamber, through the treatment channel opening into the treatment channels, through the treatment channel outlet into the outlet chamber, the rainwater flowing in a direct and alternating current pattern, and the sediment is dropped from the suspension through an opening at the bottom of the pair of angled plates and from the direct and alternating current sedimentation device. A rainwater treatment device. Claim 2 A bypass channel comprising a pair of an inlet weir, an outlet weir, and bypass channel walls, wherein a height of an upper portion of the inlet weir is the same as a height of the outlet weir between the bypass channel walls, but is lower than a height of an upper portion of the outlet weir outside the bypass channel and a height of the bypass channel walls, and the bypass channel further comprises a bypass channel that, when a flow rate exceeds a limit, receives a flow over the inlet weir, thereby bypassing the treatment chamber and the sediment storage area, the rainwater treatment device according to claim 1.

3. Under a high flow rate, rainwater flows over the inlet weir, enters the bypass channel, exceeds a notch in the outlet weir, enters the outlet chamber, and flows out of the housing through the outlet or into a suspended matter holding zone between the bypass channel wall and a third portion of the wall, the rainwater treatment device according to claim 2.

4. Under a very high flow rate, suspended matter overflows from the pair of the outlet weir and the bypass wall and enters the outlet chamber, the rainwater treatment device according to claim 3.

5. The complementary angle is between about 45 / 145 degrees and about 65 / 115 degrees, the rainwater treatment device according to claim 1.

6. Each width of the angled plates is shorter than a length of the angled plates, the rainwater treatment device according to claim 1.

7. A distance between the pair of the angled plates is between 2.54 cm (1 inch) and 10.16 cm (4 inches), the rainwater treatment device according to claim 1.

8. Further comprising a flow diverter positioned in the inlet chamber for guiding the rainwater into the treatment channel, the rainwater treatment device according to claim 1.

9. A method for removing suspended sediment from rainwater, Receiving rainwater containing suspended sediment at an inlet of a wall of a rainwater treatment device having a housing with a floor and walls, wherein the rainwater flows into an inlet chamber defined by a first portion of the wall and a front baffle, and the front baffle extends vertically from the floor of the housing, the receiving step; A treatment chamber having a direct current and alternating current sedimentation device defined by a front baffle, a second portion of the wall, a rear baffle, and a bypass prevention plate, and disposed within the treatment chamber, receiving the rainwater containing suspended sediment; The direct current and alternating current sedimentation device having a treatment channel defined by the front baffle, the rear baffle, a first pair of angled plates disposed on a first side of the center line of the housing, and a second pair of angled plates disposed on a second side of the center line, the first pair of angled plates and the second pair of angled plates being provided at a supplementary angle between the angled plates, the first pair of angled plates and the second pair of angled plates being disposed between the front baffle and the rear baffle, the front baffle having a treatment channel opening, the rear baffle having a treatment channel outlet, receiving, by the direct current and alternating current sedimentation device, the rainwater containing suspended sediment; Flowing, by the direct current and alternating current sedimentation device and under normal flow rate, the suspended sediment from the suspension through an opening at a lower portion of the pair of angled plates and dropping the suspended sediment from the direct current and alternating current sedimentation device to flow the rainwater in a direct current and alternating current pattern; Receiving, in an outlet chamber defined by the rear baffle, the second portion of the wall, and a short-circuit prevention plate, the rainwater with a part of the sediment removed; Releasing, through an outlet within a third portion of the wall, the rainwater with the suspended sediment removed. A method comprising the steps.

10. At high flow rates, receiving rainwater with sediment into the bypass channel, the bypass channel comprising a pair of an inlet weir, an outlet weir, and bypass channel walls, the height of the upper part of the inlet weir being the same as the height of the upper part of the notch in the outlet weir, the height of the upper part of the outlet weir and the upper part of the bypass channel walls being lower, the bypass channel receiving flow over the inlet weir when the flow rate exceeds a limit, thereby bypassing the treatment chamber and the sediment storage area, and the rainwater with sediment flowing over the inlet weir, into the bypass channel, over the notch in the outlet weir, into the outlet chamber, and out of the housing through the outlet, the method according to claim 9 further comprising the receiving step.

11. The method according to claim 10, wherein at high flow rates, a portion of the rainwater flows over the inlet weir and into the suspended matter holding zone between the bypass channel wall and the third portion of the wall.

12. The method according to claim 11, wherein the suspended matter is retained within the suspended matter holding zone.

13. The method according to claim 12, wherein at very high flow rates, the suspended matter overflows from the notch in the outlet weir and the pair of bypass walls and enters the outlet chamber.

14. The method according to claim 11, wherein the complementary angle is between about 45 / 145 degrees and about 65 / 115 degrees.

15. The method according to claim 11, wherein the width of each of the angled plates is shorter than the length of the plate.

16. The method according to claim 11, wherein the spacing between the pair of angled plates is between about 2.54 cm (1 inch) and 10.16 cm (4 inches).

17. The method according to claim 9, wherein the rainwater is directed into the treatment channel by a flow splitter.

18. The first pair of angled plates and the second pair of angled plates of the rainwater treatment device according to claim 1 branch at an angle between about 50 degrees and about 90 degrees.

19. The first pair of angled plates and the second pair of angled plates of the method according to claim 9 branch at an angle between about 50 degrees and about 90 degrees.

Images