A water body treatment system

Abstract

The application discloses a water body treatment system and belongs to the technical field of sewage treatment. The system comprises a water body area, wherein aquatic plants and submerged plants are planted, and aquatic animals are bred; a marginal emergent plant belt is arranged on one side edge of the water body area close to a farmland breeding area; an integrated device is arranged, wherein an input end is communicated with a domestic sewage discharge port of a living area, and an output end is communicated with the water body area; the integrated device is used for purifying domestic sewage of the living area and discharging the domestic sewage into the water body area; and a biological filter wall is arranged on one side edge of the water body area close to the living area. The sewage of the living area is discharged into the water body area after being purified by the integrated device for secondary treatment, and the mild treatment is realized by using plants and a water ecological environment, so that the water body treatment effect is improved. In addition, rainwater of the living area can enter the water body area through the biological filter wall, and the rainwater is mixed with the sewage treated once to realize comprehensive treatment, so that the treatment effect of the sewage and the rainwater of the living area is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a water treatment system. Background Technology

[0002] The reaction mechanism of a biofilter wall is as follows: Highly efficient biodegrading microorganisms are combined with suitable filling materials and then filled into a reaction device resembling a "wall." When polluted water flows into the reaction wall from one end, the filling medium removes some organic and inorganic pollutants through physical adsorption, chemical transformation, and biodegradation. The polluted water then flows out from the other side of the PRB wall. These reaction walls typically use degradable filling materials, which primarily serve to provide a growth carrier for microorganisms, as well as a carbon source and electron donor.

[0003] In the treatment of black and odorous water bodies in rural areas, the treatment effect of using biological filter walls alone is not obvious. Summary of the Invention

[0004] The purpose of this invention is to provide a water treatment system to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows: a water treatment system, located between a residential area and a farmland / aquaculture area, the system comprising: a water area planted with floating and submerged plants and aquatic animals raised thereon, wherein an emergent plant strip is provided on the edge of the water area near the farmland / aquaculture area; an integrated device, with its input end connected to the domestic sewage discharge outlet of the residential area and its output end connected to the water area, the integrated device being used to purify the domestic sewage of the residential area and discharge it into the water area; and a biological filter wall, which is installed on the edge of the water area near the residential area.

[0006] This technical solution has at least the following beneficial effects: sewage from the residential area is purified and treated by an integrated device before being discharged into the water body for secondary treatment. It utilizes plants and the aquatic ecological environment to achieve gentle treatment and improve the water body treatment effect. In addition, rainwater from the residential area can enter the water body through a biological filter wall and be mixed with the sewage treated at the primary stage for comprehensive treatment, which can greatly improve the treatment effect of sewage and rainwater in the residential area.

[0007] As a further improvement to the above technical solution, the integrated equipment includes a reactor, an aeration unit, and a sedimentation tank. The reactor includes an anaerobic hydrolysis tank and a contact oxidation tank connected together. The aeration unit is located at the bottom of the contact oxidation tank. Domestic sewage from the living area is connected to the anaerobic hydrolysis tank. The contact oxidation tank is connected to the sedimentation tank. The sedimentation tank is connected to the water body area.

[0008] As a further improvement to the above technical solution, the integrated equipment is also equipped with a pretreatment unit, which includes a grid well, a lift pump and an equalization tank. The domestic sewage from the living area is connected to the grid well for filtration treatment, then flows to the equalization tank for water quality and quantity adjustment, and finally is pumped to the anaerobic hydrolysis tank by the lift pump.

[0009] As a further improvement to the above technical solution, a water distribution pipe is provided at the outlet of the sedimentation tank, and the water distribution pipe is evenly laid inside the biological filter wall.

[0010] As a further improvement to the above technical solution, the biological filter wall includes a first wall and a second wall, a second treatment chamber is provided between the first wall and the second wall, the second treatment chamber is filled with a second filler, a plant layer is planted on top of the second filler, the first wall is provided with a first outlet, the second wall is provided with a second outlet that is higher than the first outlet, the first wall is located on the side closer to the living area, and the second wall is located on the side closer to the water area.

[0011] As a further improvement to the above technical solution, the second filler includes three layers of second filler distributed from top to bottom. The particle sizes of the three layers of second filler are 3 cm, 1 cm and 3 cm from top to bottom, and the thickness ratio of the three layers of second filler is 1:14:1 from top to bottom.

[0012] As a further improvement to the above technical solution, a first processing chamber is provided on the side of the first wall near the living area. The first processing chamber is filled with a first filler, the height of the second filler is less than the height of the first filler, and the height of the first wall is greater than the height of the first filler.

[0013] As a further improvement to the above technical solution, the first filler includes three layers of first filler distributed from top to bottom. The particle sizes of the three layers of first filler are 5 cm, 4 cm and 3 cm from top to bottom, and the thickness ratio of the three layers of first filler is 5:3:2 from top to bottom.

[0014] As a further improvement to the above technical solution, the second packing is provided with the same number of arc-shaped filters as the second water outlet. Two ends of the arc-shaped filters extend to the first wall and the second wall respectively, and the other two ends of the arc-shaped filters bend upward and extend out of the second packing, so that the arc-shaped filters are distributed around the first water outlet and the arc-shaped filters separate the first water outlet and the second water outlet. A filter element is provided inside the arc-shaped filters.

[0015] As a further improvement to the above technical solution, the arc-shaped filter has openings at both ends extending from the second packing material, and the filter element can slide inside the arc-shaped filter. When the filter element is installed into the arc-shaped filter from one of the openings, it can be pushed out of the arc-shaped filter from the other opening. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the aquatic plant arrangement density table in an embodiment of the present invention; Figure 3 This is a schematic diagram showing the dimensions of the integrated device in an embodiment of the present invention; Figure 4 This is a schematic diagram showing the dimensions of the preprocessing unit in an embodiment of the present invention; Figure 5 This is a schematic diagram of the inlet and outlet water quality tables for the integrated equipment design in this embodiment of the invention; Figure 6 This is a schematic diagram of the structure of the biological filter wall in an embodiment of the present invention; Figure 7 This is a table illustrating the pollutant removal performance of the biological filter wall in an embodiment of the present invention. Figure 8 This is a schematic diagram of the arc-shaped filter in an embodiment of the present invention.

[0017] 100. Living area; 110. Farmland and aquaculture area; 200. Water area; 210. Emergent plant belt; 300. Integrated equipment; 310. Grid well; 320. Regulating tank; 400. Biological filter wall; 410. First wall; 411. First outlet; 420. Second wall; 421. Second outlet; 500. First treatment chamber; 510. First packing material; 600. Second treatment chamber; 610. Second packing material; 620. Plant layer; 700. Arc filter. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Reference Figure 1 A water treatment system includes a water zone 200, an integrated device 300, and a biological filter wall 400.

[0023] One side of the water body area 200 is the living area 100, and the other side is the farmland and aquaculture area 110. The integrated equipment 300 is installed at the edge of the water body area 200 to purify domestic sewage from the living area 100 and discharge it into the water body area 200. The biological filter wall 400 is set at the edge of the water body area 200 near the living area 100. The biological filter wall 400 can separate the water body area 200 and the living area 100.

[0024] The water body area 200 is planted with floating and submerged plants, and aquatic animals are also raised in the water body area 200. An emergent plant strip 210 is set on the edge of the water body area 200 near the farmland aquaculture area 110. It can be understood that the two ends of the emergent plant strip 210 are connected to the two ends of the biological filter wall 400, so that the emergent plant strip 210 and the biological filter wall 400 enclose the edge of the water body area 200.

[0025] For example, water area 200 can be designed as a pond structure. The pond is first partially desilted by pumping out organic sediment, and then an underwater forest system is constructed. Submerged plants mainly consist of dwarf Vallisneria natans and Ceratophyllum demersum, while floating-leaved plants include water lilies. Emergent plants in belt 210 primarily include irises, loosestrife, and Thalia dealbata. The width of the emergent plant belt is 1.0 meter. Aquatic animals mainly consist of native fish and benthic animals. By rationally combining aquatic plants with different growth habits, a stable, healthy, and self-purifying aquatic ecosystem is formed.

[0026] Aquatic plant arrangement density as follows Figure 2 As shown, adjustments can be made flexibly based on specific circumstances in practical applications. Taking into account water depth, survival rate, and construction costs, aquatic plant planting employs a combination of direct seeding, cutting, and planting methods. Emergent plants in shallow water areas along the pond edge are planted directly. Selected plants are chosen for their strong nitrogen and phosphorus removal capabilities and effective algae suppression to enhance the resilience of the aquatic ecosystem and maintain its biodiversity. Furthermore, the planting density of submerged plants near the 400mm biofilter wall can be appropriately increased.

[0027] The input end of the integrated equipment 300 is connected to the domestic sewage discharge outlet of the living area, and the output end of the integrated equipment 300 is connected to the water body area 200, so that the domestic sewage enters the water body area 200 for secondary purification after being purified by the integrated equipment 300.

[0028] Reference Figure 3-5 Specifically, the integrated equipment 300 includes a pretreatment unit, a reactor, an aeration unit, and a sedimentation tank. The reactor includes an anaerobic hydrolysis tank and a contact oxidation tank, which are connected. The aeration unit is located at the bottom of the contact oxidation tank. The pretreatment unit includes a grid well, a lift pump, and a regulating tank. The contact oxidation tank is connected to the sedimentation tank, which is connected to the water body area 200. The residential area 100 can be a rural area. Rural domestic sewage is collected through the village's pipe network and enters the anaerobic hydrolysis tank of the integrated equipment 300 through the grid well and regulating tank. The sewage first passes through the grid well to remove larger impurities, particles, and floating matter, and then enters the regulating tank to balance the water quality and quantity. The sewage in the regulating tank is then lifted by the lift pump into the anaerobic hydrolysis tank. Suspended combined packing material serves as a carrier for the biofilm in the anaerobic hydrolysis tank, while suspended elastic combined packing material is used in the contact oxidation tank.

[0029] After being treated sequentially in an anaerobic hydrolysis tank and a contact oxidation tank, the wastewater enters a sedimentation tank for further sedimentation. A distribution pipe is installed at the outlet of the sedimentation tank, and this distribution pipe is evenly laid within the biological filter wall 400. This allows the wastewater treated initially to be guided into the biological filter wall 400 for further treatment before flowing into the water body zone 200. In other embodiments, the distribution pipe can also be located within the water body zone 200.

[0030] Among them, the integrated equipment 300 can be set up as a buried type with a scale of 10m. 3 The unit, measuring 4500mm × 2300mm × 2300mm (length × width × height), is made of carbon steel and includes pre-installed piping, aeration membrane, and filler. The integrated unit has a hydraulic load of 0.97m at 300 km / h. 3 / (m 2 ·d), the volumetric loading rate is 29.4 gBOD5 / (m³). 3 (BOD5 is the five-day biochemical oxygen demand).

[0031] In some embodiments, the integrated device 300 may also be replaced with other existing integrated water purification devices.

[0032] Reference Figure 6-7 Furthermore, the biological filter wall 400 includes a first wall 410 and a second wall 420. The first wall 410 and the second wall 420 are arranged side by side along the parallel direction of the water area 200 and the living area 100. The first wall 410 is located on the side closer to the living area 100, and the second wall 420 is located on the side closer to the water area 200. A distance is provided between the first wall 410 and the second wall 420, forming a second treatment chamber 600. The second treatment chamber 600 is filled with a second filler 610, and a plant layer is planted on top of the second filler 610. The planted plants can be windmill grass, canna lilies, etc., with a plant height of 25.0 cm and a planting density of 20 plants / m2.

[0033] The first wall 410 has a first water outlet 411 near the bottom, and the second wall 420 has a second water outlet 421 near the top, so that the position of the second water outlet 421 is higher than the position of the first water outlet 411.

[0034] The second packing material 610 comprises three layers of second packing material, which are stacked sequentially from top to bottom. The particle sizes of the three layers of second packing material are 3 cm, 1 cm, and 3 cm from top to bottom, and the thickness ratio of the three layers of second packing material is 1:14:1 from top to bottom.

[0035] Furthermore, a first treatment chamber 500 is provided on the side of the first wall 410 closest to the living area 100. The first treatment chamber 500 is filled with a first filler 510, wherein both the first filler 510 and the second filler 610 can be made of crushed stone and / or ceramsite. The height of the second filler 610 is less than the height of the first wall 410, which is lower than the height of the first filler 510. In addition, the height difference between the first filler 510 and the second filler 610 is 30cm to avoid an excessively large or small difference in the height of wastewater in the first filler 510 and the second filler 610. The height of the first filler 510 is level with the bank, and the height of the second filler 610 is the highest water level in the water body area over 200 years plus a 15cm margin.

[0036] Furthermore, the first packing 510 includes three first packing layers, which are stacked sequentially from top to bottom. The particle sizes of the three first packing layers are 5 cm, 4 cm and 3 cm from top to bottom, and the thickness ratio of the three first packing layers is 5:3:2 from top to bottom.

[0037] The biological filter wall 400 can be 180 meters long and 1.3 meters wide, the first treatment chamber 500 can be 30 centimeters wide, and the second treatment chamber can be 100 centimeters wide.

[0038] Understandably, wastewater generated by rainfall within the activity area flows from the shore into the first treatment chamber 500. Under gravity, the wastewater flows downwards through the first packing material 510, where most solid impurities are isolated and precipitated. The packing material and its attached microorganisms then undergo physical adsorption, chemical transformation, and biodegradation, removing some pollutants from the wastewater. The wastewater then flows into the second treatment chamber 600, where the synergistic effect of the plant layer, the second packing material 610, and its attached microorganisms further removes pollutants. The treated water in the second treatment chamber 600 is discharged into a natural water body, where the natural water body's self-purification capacity continues to purify the pollutants.

[0039] In this system, rainwater runoff flows into the first treatment chamber 500. Suspended solids (SS) in the wastewater are easily trapped by the filter media, causing blockages. This necessitates periodic mechanical vibration and hydraulic flushing of the filter media before reuse. While conventional biofilters require removing the plants and cleaning the filter media, the biofilter 400 in this embodiment has a dedicated SS trapping area—the first treatment chamber 500. Therefore, when blockages occur, only the first filter media 510 in the first treatment chamber 500 needs cleaning. Compared to conventional biofilters, this solves the problem of inconvenient filter media cleaning and saves on maintenance costs. The effluent from the first treatment chamber 500 is evenly distributed through a distribution pipe laid at the bottom of the second treatment chamber 600, forming a vertical flow from the bottom of the second treatment chamber 600 upwards.

[0040] In addition, the treated water from the integrated equipment 300 flows into the biological filter wall 400, where it is evenly distributed by a water distribution pipe laid inside the biological filter wall 400. The water distribution pipe is laid at the bottom of the second treatment chamber 600, ensuring that the hydraulic load of its distribution area is 0.5m. 3 / (m 2 ·d). The water distribution pipes laid inside the biological filter wall 400 are made of plastic and are laid along the central axis at the bottom of the second treatment chamber 600 of the biological filter wall 400. Experimental simulations of wastewater treatment show that when the hydraulic load of the biological filter wall is 0.5m... 3 / (m 2 At time d), the removal rates of CODCr, TP, TN and ammonia nitrogen were 68.11%, 65.66%, 74.73% and 66.47%, respectively.

[0041] Reference Figure 8 Optionally, an arc-shaped filter 700 is embedded within the second packing 610. The number of arc-shaped filters 700 is the same as the number of second outlets 421. The length of the arc-shaped filter 700 is the same as the width of the second treatment chamber 600, so that both ends of the arc-shaped filter 700 abut against the sidewalls of the first wall 410 and the second wall 420 respectively in the length direction. The arc-shaped filter 700 is bent upwards at both ends in the width direction and extends onto the second packing 610. The arc-shaped filter 700 can separate the first outlet 411 and the second outlet 421, thereby achieving the effect of filtration. A filter element is installed inside the arc-shaped filter 700. The filter element is a porous container filled with filter material. The filter material can be selected from filter cotton, biofilm, activated carbon, etc., depending on actual needs.

[0042] Furthermore, both ends of the arc-shaped filter 700 in the width direction are provided with openings of the same width as the inner cavity after the second packing 610 extends out, and the openings are equipped with sealing doors. The filter element is fan-shaped and can slide within the inner cavity of the arc-shaped filter 700. When the filter element needs to be replaced, by opening the two openings and pushing the new filter element into one opening, the old filter element can be pushed out from the other opening, thus quickly replacing the filter element.

[0043] It is understood that the outer surface of the arc filter 700 is provided with multiple filter holes that communicate with the inner cavity. The filter holes can be set as grid type or square. The second packing 610 distributed on the outer periphery of the arc filter 700 is preferably made of round ceramic particles.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A water treatment system, characterized in that, The system is located between the living area and the farmland / livestock area, and the system includes: The water body area is planted with floating and submerged plants and aquatic animals are raised there. An emergent plant strip is set up on the edge of the water body area near the farmland aquaculture area. An integrated device with its input end connected to the domestic sewage discharge outlet of the living area and its output end connected to the water body area, the integrated device being used to purify the domestic sewage of the living area and discharge it into the water body area; A biological filter wall is installed along the edge of the water body area near the living area.

2. The water treatment system according to claim 1, characterized in that: The integrated equipment includes a reactor, an aeration unit, and a sedimentation tank. The reactor includes an anaerobic hydrolysis tank and a contact oxidation tank connected together. The aeration unit is located at the bottom of the contact oxidation tank. Domestic sewage from the living area is connected to the anaerobic hydrolysis tank. The contact oxidation tank is connected to the sedimentation tank. The sedimentation tank is connected to the water body area.

3. The water treatment system according to claim 2, characterized in that: The integrated equipment is also equipped with a pretreatment unit, which includes a grid well, a lift pump and an equalization tank. The domestic sewage from the living area is connected to the grid well for filtration treatment, then flows to the equalization tank for water quality and quantity adjustment, and finally is pumped to the anaerobic hydrolysis tank by the lift pump.

4. The water treatment system according to claim 2, characterized in that: The sedimentation tank outlet is equipped with a water distribution pipe, which is evenly laid inside the biological filter wall.

5. The water treatment system according to claim 1, characterized in that: The biofilter wall includes a first wall and a second wall, with a second treatment chamber between the first wall and the second wall. The second treatment chamber is filled with a second filler, and a plant layer is planted on top of the second filler. The first wall is provided with a first outlet, and the second wall is provided with a second outlet that is higher than the first outlet. The first wall is located on the side closer to the living area, and the second wall is located on the side closer to the water area.

6. The water treatment system according to claim 5, characterized in that: The second filler comprises three layers of second filler distributed from top to bottom. The particle sizes of the three layers of second filler are 3 cm, 1 cm and 3 cm from top to bottom, and the thickness ratio of the three layers of second filler is 1:14:1 from top to bottom.

7. The water treatment system according to claim 5, characterized in that: The first wall has a first processing chamber on the side closest to the living area. The first processing chamber is filled with a first filler. The height of the second filler is less than the height of the first filler, and the height of the first wall is greater than the height of the first filler.

8. The water treatment system according to claim 7, characterized in that: The first filler comprises three layers of first filler distributed from top to bottom. The particle sizes of the three first filler layers are 5 cm, 4 cm and 3 cm from top to bottom, respectively, and the thickness ratio of the three first filler layers from top to bottom is 5:3:

2.

9. The water treatment system according to claim 5, characterized in that: The second packing material contains an equal number of arc-shaped filters as the second outlet. Two ends of the arc-shaped filters extend to the first wall and the second wall, respectively. The other two ends of the arc-shaped filters bend upward and extend out of the second packing material, so that the arc-shaped filters are distributed around the first outlet and separate the first outlet and the second outlet. A filter element is provided inside the arc-shaped filters.

10. The water treatment system according to claim 9, characterized in that: Both ends of the arc-shaped filter extending from the second packing are provided with openings, and the filter element can slide inside the arc-shaped filter. When the filter element is installed into the arc-shaped filter from one of the openings, it can be pushed out of the arc-shaped filter from the other opening.

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