A hybrid constructed wetland treatment system for treating contaminated water bodies

Abstract

The application discloses a kind of composite flow constructed wetland treatment systems for treating contaminated water body, by adjusting pond, stabilization pond, enhanced treatment zone, advanced treatment zone and buffer zone constitute, the water inlet end of the adjusting pond is provided with grid structure;First tertiary drop structure is arranged between the effluent end of the adjusting pond and the water inlet end of stabilization pond;Submerged overflow mechanism is arranged between the effluent end of the stabilization pond and the water inlet end of enhanced treatment zone, and biological membrane reactor is arranged in the enhanced treatment zone;Multiple groups of vertical flow treatment units are arranged in the advanced treatment zone;Second tertiary drop structure is arranged between the drainage end of the advanced treatment zone and the water inlet end of buffer zone.The overall system of the application is composed of adjusting pond, stabilization pond, enhanced treatment zone, advanced treatment zone and buffer zone, wherein suspended solids are treated, followed by COD, ammonia nitrogen and total nitrogen, and then total phosphorus is further treated, so that rural domestic sewage and agricultural non-point source pollution are treated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wetland treatment system, in particular to a composite flow artificial wetland treatment system for treating polluted water body. BACKGROUND

[0002] The wetland treatment system is a ground artificially constructed and supervised and controlled, similar to the marsh, which achieves the purification of sewage through the synergistic effect of physical chemistry and biology in the natural ecological system.

[0003] And the rural domestic sewage and agricultural non-point source pollution is an important source of water pollution in rural areas, and at present, the treatment facilities for such polluted water sources in rural areas are insufficient, if the existing pit pond water surface cannot be utilized to form a multi-stage composite flow treatment system to effectively solve the problem of water pollutants, a large amount of waste of rural water sources will be caused, therefore, the composite flow artificial wetland treatment system for treating polluted water body is proposed. SUMMARY

[0004] The present application aims to provide a composite flow artificial wetland treatment system for treating polluted water body to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a composite flow artificial wetland treatment system for treating polluted water body, which is composed of a regulating pond, a stabilization pond, a strengthened treatment area, a deep treatment area and a buffer area, a grid structure for water inlet filtration is arranged at the water inlet end of the regulating pond;

[0006] A first three-stage drop structure in a ladder shape is arranged between the water outlet end of the regulating pond and the water inlet end of the stabilization pond;

[0007] A submerged overflow mechanism is arranged between the water outlet end of the stabilization pond and the water inlet end of the strengthened treatment area, a biofilm reactor is arranged in the strengthened treatment area, and the water outlet end of the submerged overflow mechanism and the water inlet end of the biofilm reactor are connected in penetration;

[0008] A plurality of vertical flow treatment units are arranged in the deep treatment area, and a first drop structure is arranged between the water outlet end of the biofilm reactor and the water inlet end of the plurality of vertical flow treatment units;

[0009] A second three-stage drop structure for the communication between the water outlet end of the deep treatment area and the water inlet end of the buffer area is arranged.

[0010] Preferably, a first shoal area is further arranged in the strengthened treatment area, the water inlet end of the first shoal area is connected in penetration with the water outlet end of the biofilm reactor, a plurality of habitat islands are arranged in the first shoal area, the water outlet end of the first shoal area is connected in penetration with the water inlet end of the vertical flow treatment unit, and the depth of the first shoal area is 20-60 cm.

[0011] Preferably, the grid structure comprises:

[0012] The grid frame is provided with a cleaning cavity in the middle part, a water inlet on the front surface, and a plurality of water passing openings on the inner wall of the back surface of the cleaning cavity along the horizontal transverse direction.

[0013] The plurality of cleaning mechanisms arranged along the horizontal transverse direction at the water inlet are used for the first blocking of the floating garbage in the water body.

[0014] Preferably, a plurality of flow guide holes are arranged on the inner wall of the back surface of the cleaning cavity between the adjacent sides of the plurality of water passing openings, and the flow guide holes are used for the second blocking of the floating garbage in the water body.

[0015] Preferably, a plurality of rotating openings are arranged on the top of the water inlet, the inner walls on both sides of the plurality of rotating openings are provided with support rods, and the plurality of cleaning mechanisms are respectively connected to the water inlet through the plurality of support rods.

[0016] Preferably, the cleaning mechanism comprises:

[0017] The front surface of the blocking column is provided with a plurality of first blocking rods arranged along the vertical direction, and the two sides of the blocking column are provided with a plurality of second blocking rods arranged along the vertical direction.

[0018] The connecting ring is fixedly connected to the top of the blocking column, rotatably sleeved on the outer wall of the support rod, and provided with a poking pipe at the top end.

[0019] Preferably, the submerged overflow mechanism comprises a grid frame, a plurality of square cavities are arranged in the middle part of the grid frame, and a plurality of ceramsite are filled in the plurality of square cavities.

[0020] Preferably, the vertical flow treatment unit is provided as a plurality of hollow square structures with open top parts, the square structure comprises a first longitudinal wall, a first transverse bottom plate, a partition wall, a second transverse bottom plate and a second longitudinal wall, the bottom part of the first longitudinal wall is fixedly connected with one end of the first transverse bottom plate, the other end of the first transverse bottom plate is fixedly connected with one end of the second transverse bottom plate, the first transverse bottom plate and the second transverse bottom plate are connected to form a stepped shape, the partition wall is arranged above the connection part of the first transverse bottom plate and the second transverse bottom plate, a descending water flow opening is formed between the bottom end of the partition wall and the top end of the connection part of the first transverse bottom plate and the second transverse bottom plate, the other end of the second transverse bottom plate is fixedly connected with the bottom end of the second longitudinal wall, and the top part of the second longitudinal wall and the bottom part of the partition wall on the opposite side form an ascending water flow opening.

[0021] Preferably, a plurality of second shallow areas are arranged in the buffer area, the second shallow areas are arranged in a long strip structure along the horizontal longitudinal direction, and the plurality of second shallow areas are staggered.

[0022] Preferably, a natural purification area is arranged at the drainage end of the buffer area, the natural purification area comprises a plurality of third shallow areas, the third shallow areas are arranged in a long strip structure along the horizontal transverse direction, and the plurality of third shallow areas are arranged in an equal interval along the horizontal longitudinal direction, and the depths of the second shallow areas and the third shallow areas are 20-60 cm.

[0023] Technical effects and advantages of the present application:

[0024] The overall system of the present application is composed of a regulating pond, a stabilization pond, a strengthened treatment area, a deep treatment area and a buffer area, wherein the suspended solids and some COD, ammonia nitrogen and total nitrogen are treated through the regulating pond and the stabilization pond first, then the COD, ammonia nitrogen and total nitrogen are treated through the strengthened treatment area, and then the COD, ammonia nitrogen, total nitrogen and total phosphorus are further treated through the vertical flow treatment unit of the deep treatment area; finally, the impurities and suspended solids are further filtered out through the three-stage drop made by using the terrain advantage, so that the rural domestic sewage and agricultural non-point source pollution are treated, and thus the water resources are protected. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the system of the present application.

[0026] Figure 2 It is a schematic diagram of the internal structure connection of the system of the present application.

[0027] Figure 3 It is a schematic diagram of the overall structure of the grid structure of the present application.

[0028] Figure 4 It is a front view of the overall structure of the grid structure of the present application.

[0029] Figure 5 It is a top view of the overall structure of the grid structure of the present application.

[0030] Figure 6 It is a schematic diagram of the structure of the grid frame of the present application.

[0031] Figure 7 It is a schematic diagram of the structure of the cleaning mechanism of the present application.

[0032] Figure 8 It is a schematic diagram of the structure of the submerged overflow mechanism of the present application.

[0033] Figure 9 It is a sectional view of the structure of the vertical flow treatment unit of the present application.

[0034] In the diagram: 1. Adjustment pond; 2. Stabilization pond; 3. Enhanced treatment zone; 4. Deep treatment zone; 5. Buffer zone; 6. Grille frame; 7. Barrier column; 8. First and third stage cascade structure; 9. Subsurface overflow mechanism; 10. Biofilm reactor; 11. First stage cascade structure; 12. Vertical flow treatment unit; 13. Second and third stage cascade structure; 14. Natural purification zone; 31. First shoal area; 32. Habitat island; 51. Second shoal area; 61. Cleaning chamber; 62. Inlet 63. Water inlet; 64. Water outlet; 65. Guide hole; 66. Rotating port; 77. Support rod; 78. First barrier rod; 79. Second barrier rod; 70. Connecting ring; 71. Actuating pipe; 92. Gravel frame; 93. Ceramsite; 144. First longitudinal wall; 15. First transverse bottom plate; 16. Isolation wall; 17. Second transverse bottom plate; 18. Second longitudinal wall; 19. Downflow outlet; 10. Upflow outlet; 11. Third shoal area. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This invention provides, for example Figure 1 and Figure 2 The composite flow constructed wetland treatment system for treating polluted water bodies shown consists of a regulating pond 1, a stabilizing pond 2, an enhanced treatment zone 3, a deep treatment zone 4, and a buffer zone 5. The inlet end of the regulating pond 1 is equipped with a grid structure for inlet water filtration.

[0037] It should be noted that the regulating pond 1 is the first water inlet structure in the entire system. Therefore, a bar screen structure is set in this scheme to perform the first step of blocking treatment of the sewage, that is, to block and filter floating garbage and impurities through the bar screen structure.

[0038] For details, please refer to Figures 3 to 7 As shown, the grid structure includes:

[0039] The bar screen 6 has a cleaning chamber 61 in the middle, a water inlet 62 on the front, and multiple water outlets 63 on the inner wall of the back of the cleaning chamber 61 in the horizontal direction.

[0040] Furthermore, multiple guide holes 64 are provided on the inner wall of the back of the cleaning chamber 61 and between the adjacent sides of multiple water inlets 63. The guide holes 64 are used for secondary blocking of floating garbage in the water.

[0041] It should be noted that by arranging the grid frame 6, the water inlet structure of the adjusting pond 1 is adjusted, so that the sewage to be treated enters the grid frame 6 through the water inlet 62, and then is divided into the adjusting pond 1 through the water passing port 63 and the flow guide hole 64. The top of the cleaning cavity 61 is an open structure, which is convenient for cleaning the inside.

[0042] The cleaning mechanism is arranged at the water inlet 62 in a horizontal transverse arrangement, and is used for the first blocking of the floating garbage in the water body. The floating garbage that passes through the cleaning mechanism enters the cleaning cavity 61, and is then blocked by the water passing port 63 and the flow guide hole 64. The floating garbage remaining in the cleaning cavity 61 can be removed and treated from the top of the cleaning cavity 61.

[0043] Further, a plurality of rotating ports 65 are arranged at the top of the water inlet 62, and the inner walls on both sides of the plurality of rotating ports 65 are provided with support rods 66. The plurality of cleaning mechanisms are respectively connected to the water inlet 62 through the plurality of support rods 66.

[0044] The cleaning mechanism comprises:

[0045] The blocking column 7 is provided with a plurality of first blocking rods 71 arranged in a vertical direction on the front surface of the blocking column 7, and a plurality of second blocking rods 72 arranged in a vertical direction on both sides of the blocking column 7.

[0046] The connecting ring 73 is fixedly connected to the top of the blocking column 7, and is rotatably sleeved on the outer wall of the support rod 66. The top end of the connecting ring 73 is provided with a poking pipe 74.

[0047] It should be noted that after the connecting ring 73 and the support rod 66 are rotatably inserted, the blocking column 7 can be rotated. The first blocking rod 71 and the second blocking rod 72 are both inclined upward and have a circular rod structure. By arranging the first blocking rod 71 and the second blocking rod 72 in an inclined manner, the plastic bags and branches in the water body can be blocked and hung. By rotating the blocking column 7, the first blocking rod 71 and the second blocking rod 72 can be used to lift the floating objects for cleaning. The structure of the poking pipe 74 can be used to connect a long rod when the blocking column 7 is rotated, so as to increase the lever arm and facilitate the rotation adjustment of the blocking column 7.

[0048] A first three-stage waterfall structure 8 is arranged between the water outlet end of the adjusting pond 1 and the water inlet end of the stabilizing pond 2.

[0049] It should be noted that the effluent end of the regulating pond 1 is communicated with the influent end of the stabilization pond 2 through the first three-stage drop structure 8 in a stepped manner, so that the first three-stage drop structure 8 is used to make the regulating pond 1 and the stabilization pond 2 can treat suspended solids.

[0050] The effluent end of the stabilization pond 2 and the influent end of the enhanced treatment zone 3 are provided with a subsurface overflow mechanism 9, the biological membrane reactor 10 is arranged in the enhanced treatment zone 3, and the drainage end of the subsurface overflow mechanism 9 is connected with the influent end of the biological membrane reactor 10;

[0051] It should be noted that the effluent end of the stabilization pond 2 is communicated with the inlet of the biological membrane reactor 10 of the enhanced treatment zone 3 through the subsurface overflow mechanism 9, and the subsurface overflow mechanism 9 and the biological membrane reactor 10 make the enhanced treatment zone 3 can treat COD, ammonia nitrogen and total nitrogen, wherein the biological membrane reactor 10 is a kind of reactor combining membrane separation and biological treatment technology, and is widely used in water treatment, wastewater treatment and waste gas treatment and other fields, which is to use the biological membrane (activated sludge) formed by microorganism on the membrane surface to degrade and remove the pollutants in water, and the treated water and microorganism are separated by the separation function of the membrane, to achieve the purpose of water resource reuse or wastewater treatment.

[0052] Specifically, the first shallow area 31 is further arranged in the enhanced treatment zone 3, the influent end of the first shallow area 31 is connected with the drainage end of the biological membrane reactor 10, a plurality of habitat islands 32 are arranged in the first shallow area 31, the drainage end of the first shallow area 31 is connected with the influent end of the vertical flow treatment unit 12, and the depth of the first shallow area 31 is 20-60 cm.

[0053] It should be noted that the water flow through the wetland is prolonged by the first shallow area 31, and the water food chain is restored by the habitat island 32 to improve the self-purification function of the wetland.

[0054] Specifically, referring to FIG. 1, Figure 8 As shown in FIG. 1, the subsurface overflow mechanism 9 includes a grid frame 91, a plurality of square cavities are arranged in the middle of the grid frame 91, and a plurality of ceramsite 92 are filled in the plurality of square cavities respectively.

[0055] It should be noted that the grid frame 91 is divided into four square cavities for filling the ceramsite 92, the properties of the ceramsite 92 in each square cavity are different, when the water flow is small, the water flow is filtered by the ceramsite 92 and then flows through the subsurface overflow mechanism 9, when the water flow is large, the water flow overflows from the top of the subsurface overflow mechanism 9, and the setting depth of the subsurface overflow mechanism 9 is 2-3 meters.

[0056] A plurality of groups of vertical flow treatment units 12 are arranged in the advanced treatment zone 4, and the drainage end of the biological membrane reactor 10 is provided with a first drop structure 11 connected with the influent end of the plurality of groups of vertical flow treatment units 12;

[0057] It should be noted that the outlet of the biological membrane reactor 10 is communicated with the inlet of the vertical flow treatment unit 12 of the advanced treatment area 4 through the first cascade structure 11, and the COD, ammonia nitrogen, total nitrogen and total phosphorus are further treated by the vertical flow treatment unit 12.

[0058] Specifically, referring to Figure 9 As shown in the figure, the vertical flow treatment unit 12 is provided as a plurality of hollow and top-open square structures, and the square structure includes a first longitudinal wall 121, a first transverse bottom plate 122, a partition wall 123, a second transverse bottom plate 124 and a second longitudinal wall 125, the bottom of the first longitudinal wall 121 is fixedly connected with one end of the first transverse bottom plate 122, the other end of the first transverse bottom plate 122 is fixedly connected with one end of the second transverse bottom plate 124, and the first transverse bottom plate 122 and the second transverse bottom plate 124 are connected to form a stepped shape, the partition wall 123 is arranged above the connection between the first transverse bottom plate 122 and the second transverse bottom plate 124, and the bottom end of the partition wall 123 and the top end of the connection between the first transverse bottom plate 122 and the second transverse bottom plate 124 form a descending water flow port 126, and the other end of the second transverse bottom plate 124 is fixedly connected with the bottom end of the second longitudinal wall 125, and the top of the second longitudinal wall 125 and the bottom of the partition wall 123 opposite side form an ascending water flow port 127.

[0059] It should be noted that the top end of the first longitudinal wall 121 is lower than the top end of the partition wall 123, at this time the top end of the first longitudinal wall 121 forms a water flow inlet, and the top end of the second longitudinal wall 125 is lower than the top end of the first longitudinal wall 121, so as to form the ascending water flow port 127, and the sewage is ensured not to be short-circuited by the vertical flow treatment unit 12, and the reaction process is prolonged, so that the sludge can be in a suspended state, and the sewage and the sludge are fully mixed and reacted, thereby improving the denitrification and phosphorus removal effect.

[0060] The second cascade structure 13 is arranged between the drainage end of the advanced treatment area 4 and the water inlet end of the buffer area 5.

[0061] It should be noted that the outlet of the vertical flow treatment unit 12 is communicated with the buffer area 5 through the second cascade structure 13, so as to fully utilize the terrain advantage to manufacture a three-stage cascade to filter out impurities and suspended solids.

[0062] Specifically, a plurality of second shoal areas 51 are arranged in the buffer area 5, the second shoal area 51 is arranged as a horizontal longitudinal strip-shaped structure, and the plurality of second shoal areas 51 are arranged staggered.

[0063] Further, the drainage end of the buffer zone 5 is provided with a natural purification zone 14, the natural purification zone 14 comprising a plurality of third shoal zones 141, the third shoal zones 141 being provided in a horizontal strip-shaped structure, and the plurality of third shoal zones 141 being arranged in an equal interval along a horizontal longitudinal direction, the second shoal zone 51 and the third shoal zone 141 having a depth of 20-60 cm.

[0064] It should be noted that the second shoal zone 51 and the third shoal zone 141 are arranged to prolong the hydraulic retention time of the water flow through the wetland.

[0065] Finally, it should be noted that the above description is only the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A hybrid constructed wetland treatment system for treating a contaminated water body, the system comprising: The pond comprises a regulating pond (1), a stabilization pond (2), an enhanced treatment zone (3), a deep treatment zone (4) and a buffer zone (5), a grid structure for water inlet filtration is arranged at the water inlet end of the regulating pond (1); The grid structure comprises: A grid frame (6) is arranged at the water inlet end of the regulating pond (1), a cleaning cavity (61) is arranged in the middle of the grid frame (6), a water inlet (62) is arranged on the front surface of the grid frame (6), and a plurality of water passing openings (63) are arranged on the inner wall of the back surface of the cleaning cavity (61) along the horizontal transverse direction; A plurality of cleaning mechanisms are arranged at the water inlet (62) along the horizontal transverse direction, and the plurality of cleaning mechanisms are used for the first blocking of the floating garbage in the water body; A plurality of flow guide holes (64) are arranged on the inner wall of the back surface of the cleaning cavity (61) and between the adjacent sides of the plurality of water passing openings (63), and the flow guide holes (64) are used for the second blocking of the floating garbage in the water body; A plurality of rotating openings (65) are arranged at the top of the water inlet (62), support rods (66) are arranged on the inner walls of the two sides of the plurality of rotating openings (65), and a plurality of cleaning mechanisms are respectively connected to the water inlet (62) through the plurality of support rods (66); The cleaning mechanism comprises: A blocking column (7) is arranged at the water inlet end of the regulating pond (1), a plurality of first blocking rods (71) are arranged on the front surface of the blocking column (7) along the vertical direction, and a plurality of second blocking rods (72) are arranged on the two sides of the blocking column (7) along the vertical direction; A connecting ring (73) is fixedly connected to the top of the blocking column (7), the connecting ring (73) is rotatably sleeved on the outer wall of the support rod (66), and a pushing pipe (74) is arranged at the top end of the connecting ring (73); A first three-stage water falling structure (8) is arranged between the water outlet end of the regulating pond (1) and the water inlet end of the stabilization pond (2); A submerged overflow mechanism (9) is arranged between the water outlet end of the stabilization pond (2) and the water inlet end of the enhanced treatment zone (3), a biofilm reactor (10) is arranged in the enhanced treatment zone (3), and the water outlet end of the submerged overflow mechanism (9) and the water inlet end of the biofilm reactor (10) are connected in penetration; A plurality of vertical flow treatment units (12) are arranged in the deep treatment zone (4), and a first water falling structure (11) is arranged between the water outlet end of the biofilm reactor (10) and the water inlet end of the plurality of vertical flow treatment units (12); A second three-stage water falling structure (13) is arranged between the water outlet end of the deep treatment zone (4) and the water inlet end of the buffer zone (5) for the communication between the two.

2. The composite flow constructed wetland system for treating contaminated water body according to claim 1, wherein, A first shoal zone (31) is further arranged in the enhanced treatment zone (3), the water inlet end of the first shoal zone (31) is connected in penetration with the water outlet end of the biofilm reactor (10), a plurality of habitat islands (32) are arranged in the first shoal zone (31), the water outlet end of the first shoal zone (31) is connected in penetration with the water inlet end of the vertical flow treatment unit (12), and the depth of the first shoal zone (31) is 20-60 cm.

3. The composite flow constructed wetland system for treating contaminated water body according to claim 1, wherein, The potential overflow mechanism (9) comprises a grid frame (91), and a plurality of square cavities are arranged in the middle of the grid frame (91), and a plurality of ceramsite (92) are filled in the plurality of square cavities.

4. The composite flow constructed wetland system for treating contaminated water body according to claim 1, wherein, The vertical flow treatment unit (12) is arranged as a plurality of hollow square structures with open top, and the square structure comprises a first longitudinal wall (121), a first transverse bottom plate (122), a partition wall (123), a second transverse bottom plate (124) and a second longitudinal wall (125), the bottom of the first longitudinal wall (121) is fixedly connected with one end of the first transverse bottom plate (122), the other end of the first transverse bottom plate (122) is fixedly connected with one end of the second transverse bottom plate (124), the first transverse bottom plate (122) and the second transverse bottom plate (124) are connected to form a stepped shape, the partition wall (123) is arranged above the connection position of the first transverse bottom plate (122) and the second transverse bottom plate (124), a descending water flow port (126) is formed between the bottom end of the partition wall (123) and the top end of the connection position of the first transverse bottom plate (122) and the second transverse bottom plate (124), the other end of the second transverse bottom plate (124) is fixedly connected with the bottom end of the second longitudinal wall (125), and the top of the second longitudinal wall (125) is opposite to one side of the bottom of the partition wall (123) to form an ascending water flow port (127).

5. The composite flow constructed wetland system for treating contaminated water body as claimed in claim 1 wherein, A plurality of second shoal areas (51) are arranged in the buffer area (5), the second shoal area (51) is arranged as a long strip structure along the horizontal longitudinal direction, and a plurality of second shoal areas (51) are arranged staggered.

6. The composite flow constructed wetland system for treating a contaminated water body according to claim 5, wherein, A natural purification area (14) is arranged at the drainage end of the buffer area (5), the natural purification area (14) comprises a plurality of third shoal areas (141), the third shoal area (141) is arranged as a long strip structure along the horizontal transverse direction, a plurality of third shoal areas (141) are arranged at equal intervals along the horizontal longitudinal direction, and the depths of the second shoal area (51) and the third shoal area (141) are 20-60 cm.

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