System for treating domestic wastewater by utilizing constructed wetland

Abstract

The invention discloses a system for treating domestic wastewater by utilizing a constructed wetland, which comprises an anaerobic tank, wherein the water outlet end of the anaerobic tank is communicated with the constructed wetland; toilet sewage flows into the septic tank through the water inlet end of the septic tank, and the water outlet end of the septic tank is communicated with the water inlet end of the anaerobic tank; sewage of a kitchen and a bathroom flows into the oil separation tank through a water inlet of the oil separation tank, a water outlet of the oil separation tank is communicated with a water inlet end of the anaerobic tank, a plurality of rapid oil removal components are arranged in the oil separation tank, and a residue filtering component is arranged at one end, close to the water inlet, of the oil separation tank. According to the domestic water treatment device, black water and grey water generated in domestic water can be mixed and treated together, and meanwhile, impurities, oil residues and the like generated in sewage precipitation can be quickly treated and cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of artificial wetland sewage treatment, and in particular to a system for treating domestic wastewater by utilizing artificial wetlands. Background Art

[0002] The indiscriminate discharge of sewage will cause the water in ditches and ponds to turn black and smelly, breed mosquitoes, affect the rural living environment and threaten the health of residents. It will also cause pollution of drinking water sources and eutrophication of lakes and reservoirs.

[0003] Constructed wetlands are artificially constructed and controlled land similar to swamps. Sewage and sludge are distributed in a controlled manner on the artificially constructed wetlands. In the process of sewage and sludge flowing in a certain direction, the sewage and sludge are treated by mainly utilizing the physical, chemical and biological synergistic effects of soil, matrix, plants and microorganisms. Rural sewage mainly includes black water (i.e. toilet feces) and gray water (i.e. bathing water, kitchen water, etc.). Due to the different characteristics of black water and gray water, the existing sewage treatment system using artificial wetlands cannot pre-treat black water and gray water, resulting in poor subsequent static water effect, unable to give full play to the role of artificial wetlands, and even causing damage to artificial wetlands. At the same time, solid impurities, grease and other impurities precipitated in domestic sewage cannot be easily recovered and cleaned, resulting in a decrease in system performance after long-term use. Summary of the invention

[0004] Purpose of the invention: The present invention provides a system for treating domestic wastewater using artificial wetlands, which can mix black water and gray water generated in domestic water and treat them together, and can also quickly clean up impurities, oil residues, etc. generated in sewage precipitation.

[0005] Technical solution: The present invention proposes a system for treating domestic wastewater using artificial wetlands, comprising an anaerobic tank, an artificial wetland connected to the water outlet of the anaerobic tank, a septic tank and a grease trap; the water outlet of the septic tank and the water inlet of the grease trap are connected to the water inlet of the anaerobic tank, the grease trap is further provided with a plurality of rapid oil removal components, a residue filter assembly is provided at one end of the grease trap close to the water inlet, the grease trap is divided into a first compartment, a second compartment, a third compartment and a clean water compartment in the horizontal direction by a plurality of partitions, the water inlet is connected to the first compartment chamber, a water outlet; the residue filtering assembly is located in the first compartment; the oil removal assembly comprises two groups of slide rails respectively arranged on the two opposite side walls of the grease trap, the two groups of slide rails are respectively slidably connected with bearing blocks, an oil containing box is detachably connected between the two groups of bearing blocks, and the height of the oil containing box between the two groups of bearing blocks is adjusted by a height adjusting member; the artificial wetland is provided with a planting layer, a transition layer and a gravel layer in sequence from top to bottom, the bottom of the gravel layer is inclined, the lower end of the gravel layer is connected with a water outlet pipe, and the planting layer is connected with the water outlet end of the anaerobic tank.

[0006] Preferably, the isolation basket is detachably connected to the first compartment, an opening is provided on the top of the isolation basket, the isolation basket is located below the water inlet, and the water inlet is provided corresponding to the opening of the isolation basket.

[0007] Preferably, the top of the grease trap is also provided with a main cover plate and a sub-cover plate detachably connected thereto; the sub-cover plate is correspondingly arranged on the top of the clean water chamber, and the main cover plate is correspondingly arranged on the tops of the first compartment, the second compartment and the third compartment.

[0008] Preferably, the height adjustment member includes a slide groove vertically opened on the supporting block and two groups of second sliders respectively fixedly connected to the two opposite outer walls of the oil box; the second slider is slidably connected in the two groups of the supporting blocks through the passage, and the bottoms of the two groups of the slide grooves are respectively fixedly connected with springs, and the tops of the two groups of the springs are respectively arranged corresponding to the bottoms of the two groups of the second sliders.

[0009] Preferably, the partition comprises an upper partition and a lower partition, the upper partition is fixedly connected between two opposite side walls of the grease trap; the lower partition is fixedly connected to two opposite side walls of the grease trap, and the bottom of the lower partition is fixedly connected to the bottom of the grease trap.

[0010] Preferably, the top of the upper partition is at the same height as the top of the grease trap, a gap is provided between the bottom of the lower partition and the bottom of the grease trap, the bottom of the lower partition is fixedly connected to the bottom of the grease trap, and a gap is provided between the top of the lower partition and the top of the grease trap.

[0011] Preferably, a clean water chamber is separated between the third compartment and the water outlet by an upper baffle, and a gap is provided between the bottom of the upper baffle and the bottom of the grease trap.

[0012] Preferably, a plurality of water inlet pipes are provided, which are evenly distributed in the planting layer, are connected to the water outlet of the anaerobic tank, and are vertically connected to water inlet branches, which are located in the planting layer.

[0013] Preferably, a handle is fixedly connected inside the oil box, and the top of the handle is higher than the top of the oil box; and inclined surfaces are respectively provided on both sides of the bearing block.

[0014] Preferably, a handle is fixedly connected to the isolation basket, and the handle is arranged close to the top of the grease trap.

[0015] Beneficial effects: The present invention has the following advantages and technical effects: the main function of the septic tank is to perform anaerobically treatment on the black water produced in the toilet, and to allow the treated clean water to enter the anaerobic tank; the main function of the grease trap is to separate water and oil from the gray water produced in the kitchen, bathroom, etc., and to allow the water without oil to enter the anaerobic tank; the main function of the anaerobic tank is to mix the black water treated by the septic tank and the gray water treated by the grease trap, and decompose organic matter into carbon dioxide and water under anaerobic conditions, and allow nitrogen- and ammonia-containing water humus to enter the artificial wetland; the main function of the artificial wetland is to use soil, plants, etc. to adsorb, filter, decompose, etc. sewage and its humus; the main function of the rapid oil removal component is to allow the floating oil in the grease trap to be quickly removed manually; the main function of the residue filter component is to filter out large particles of impurities, residues, etc. in the gray water flowing into the grease trap. On the whole, the present invention pre-treats black water and gray water through septic tanks and grease traps respectively, and then discharges them into anaerobic tanks for mixing and microbial decomposition, and finally discharges them into artificial wetlands for filtering, adsorbing, and decomposing the sewage. Only one set of system is needed to uniformly treat various types of sewage. At the same time, impurities such as oil and residues in the gray water can be collected and cleaned quickly and conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a connection diagram of the wastewater treatment device system of the present invention;

[0017] Figure 2 is a cross-sectional view of the grease trap of the present invention;

[0018] Figure 3 is a schematic diagram of a rapid oil removal assembly of the present invention;

[0019] Figure 4 is a schematic diagram of a height adjustment member of the present invention;

[0020] Figure 5 is a cross-sectional view of an artificial wetland of the present invention;

[0021] Figure 6 for Figure 5 A partial enlarged view in FIG.

[0022] Among them, 1. septic tank; 2. grease trap; 3. anaerobic tank; 4. artificial wetland; 5. water inlet; 6. water outlet; 7. isolation basket; 8. handle; 9. slide rail; 10. oil box; 11. upper partition; 12. lower partition; 13. first compartment; 14. second compartment; 15. third compartment; 16. upper baffle; 17. clean water chamber; 18. auxiliary cover; 19. main cover; 20. bearing block; 21. inclined plane; 22. first slider; 23. handle; 24. slide; 25. second slider; 26. spring; 27. planting layer; 28. transition layer; 29. ​​gravel layer; 30. water inlet pipe; 31. water outlet pipe; 32. water inlet branch pipe; 33. water outlet. DETAILED DESCRIPTION

[0023] Reference Figure 1-Figure 6 The present invention provides a system for treating domestic wastewater using artificial wetlands, comprising:

[0024] An anaerobic tank 3, the outlet of which is connected to an artificial wetland 4;

[0025] Septic tank 1, toilet sewage flows into septic tank 1 through the water inlet of septic tank 1, and the water outlet of septic tank 1 is connected with the water inlet of anaerobic tank 3;

[0026] The grease trap 2, kitchen and bathroom sewage flows into the grease trap 2 through the water inlet 5 of the grease trap 2, a plurality of rapid oil removal components are arranged in the grease trap 2, and a residue filtering component is arranged at one end of the grease trap 2 close to the water inlet 5.

[0027] The main function of the septic tank 1 is to perform anaerobically treatment on the black water produced in the toilet, and to allow the treated clean water to enter the anaerobic tank 3; the main function of the grease trap 2 is to separate water and oil from the gray water produced in the kitchen, bathroom, etc., and to allow the water without oil to enter the anaerobic tank 3; the main function of the anaerobic tank 3 is to mix the black water treated by the septic tank 1 and the gray water treated by the grease trap 2, and decompose the organic matter into carbon dioxide and water under anaerobic conditions, and allow the nitrogen- and ammonia-containing water humus to enter the artificial wetland 4; the main function of the artificial wetland 4 is to use soil, plants, etc. to adsorb, filter, and decompose sewage and its humus; the main function of the rapid oil removal component is to allow the floating oil in the grease trap 2 to be quickly removed manually; the main function of the residue filter component is to filter out large particles of impurities, residues, etc. in the gray water flowing into the grease trap 2. On the whole, the present invention pre-treats black water and gray water through septic tanks and grease traps respectively, and then discharges them into anaerobic tanks for mixing and microbial decomposition, and finally discharges them into artificial wetlands for filtering, adsorbing, and decomposing the sewage. Only one set of system is needed to uniformly treat various types of sewage. At the same time, impurities such as oil and residues in the gray water can be collected and cleaned quickly and conveniently.

[0028] The grease trap 2 is divided into a first compartment 13, a second compartment 14, and a third compartment 15 in the horizontal direction by a number of partitions. The water inlet 5 is arranged in the first compartment 13, and the water outlet 6 is arranged near the third compartment 15. The first compartment 13 and the second compartment 14 are connected to each other as well as the second compartment 14 and the third compartment 15 by partitions. Rapid oil removal components are respectively arranged in the first compartment 13, the second compartment 14, and the third compartment 15, and a residue filtering component is arranged in the first compartment 13.

[0029] like Figure 2 As shown, by providing the first compartment 13, the second compartment 14 and the third compartment 15, the grey water can be separated into oil and water step by step.

[0030] The quick oil removal assembly in the second compartment 14 includes two groups of slide rails 9 respectively arranged on the two opposite side walls of the grease trap 2. The slide rails 9 are arranged close to the top of the grease trap 2. The two groups of slide rails 9 are respectively slidably connected with support blocks 20. An oil box 10 is detachably connected between the two groups of support blocks 20. The height of the oil box 10 between the two groups of support blocks 20 is adjusted by a height adjustment member. When it is necessary to remove the grease floating on the surface, the oil box 10 can be adjusted to below the grease layer.

[0031] Further optimized solution, the height adjustment member includes a slide groove 24 vertically opened on the bearing block 20 and two groups of second sliders 25 respectively fixedly connected to the two opposite outer walls of the oil box 10, the tops of the two groups of slide grooves 24 are provided with openings, the second sliders 25 are slidably connected in the two groups of bearing blocks 20 through the openings, the bottoms of the two groups of slide grooves 24 are respectively fixedly connected with springs 26, and the tops of the two groups of springs 26 are respectively arranged corresponding to the bottoms of the two groups of second sliders 25. The side of the bearing block 20 away from the slide groove 24 is fixedly connected with the first slider 22, and the first slider 22 is slidably connected in the slide rail 9. A handle 23 is fixedly connected in the oil box 10, and the top of the handle 23 is higher than the top of the oil box 10.

[0032] like Figure 2 , Figure 3 and Figure 4 As shown, since the density of oil is smaller than that of water, the oil floats on the water surface in the first compartment 13, the second compartment 14 and the third compartment 15. The spring 26 can lift the second slider 25 to a certain height in the chute 24 by its own elasticity, thereby ensuring that the top opening of the oil box 10 is located above the grease layer. When the oil on the surface needs to be cleaned after a period of use, the operator can press down the oil box 10 through the handle 23, so that the oil box 10 moves downward along the chute 24 and compresses the spring 26. When the top of the oil box 10 drops below the surface of the grease layer, the oil will automatically flow into it through the top opening of the oil box 10. When the oil box 10 is full, the operator pulls up the handle 23 to make the second slider 25 slide out of the top opening of the chute 24, thereby lifting the oil box 10 out of the grease trap 2, which is convenient for pouring out the oil in the oil box 10. Only by aligning the second slide block 25 with the slide groove 24 can the oil container 10 be reinstalled between the two bearing blocks 20 and the cleaning can be continued.

[0033] The two sides of the bearing block 20 are respectively provided with inclined surfaces 21. Figure 2 and Figure 3 As shown, when the surface oil layer is too thin, to ensure that the oil is cleaned, the operator can grip the corresponding oil box 10, so that the oil box 10 drives the bearing block 20 to move along the slide rail 9, so that the oil box 10 can move to any position in the corresponding compartment, thereby fully cleaning the oil. The main function of the inclined surface 21 is to guide the oil to the direction of the oil box 10 during the movement of the bearing block 20.

[0034] The residue filtering assembly includes an isolation basket 7, which is detachably connected to the first compartment 13. An opening is provided on the top of the isolation basket 7. The isolation basket 7 is located below the water inlet 5, and the water inlet 5 is provided corresponding to the opening.

[0035] A handle 8 is fixedly connected to the isolation basket 7 , and the handle 8 is arranged close to the top of the grease trap 2 .

[0036] like Figure 2 As shown, a plurality of protrusions (not shown in the figure) are fixedly connected to the side wall of the grease trap 2, and the isolation basket 7 is supported in the first compartment 13 by the plurality of protrusions. The gray water flowing in from the water inlet 5 will first enter the isolation basket 7, and the solid impurities and residues in the gray water will be filtered by the isolation basket 7. When the isolation basket 7 needs to be cleaned, the operator can lift the isolation basket 7 out of the grease trap 2 by the handle 8, so as to pour out the residues.

[0037] The partition between the first partition chamber 13 and the second partition chamber 14 includes an upper partition 11 and a lower partition 12. The upper partition 11 is fixedly connected between the two opposite side walls of the grease trap 2. The top of the upper partition 11 is at the same height as the top of the grease trap 2. A gap is set between the bottom of the lower partition 12 and the bottom of the grease trap 2. The lower partition 12 is fixedly connected to the two opposite side walls of the grease trap 2. The bottom of the lower partition 12 is fixedly connected to the bottom of the grease trap 2. A gap is set between the top of the lower partition 12 and the top of the grease trap 2.

[0038] like Figure 2 As shown, since the oil floats on the water surface, by setting the upper baffle 11, water can flow from the bottom of the upper baffle 11 into the downward compartment, reducing the oil entering the next compartment, so that the oil flowing into the next compartment is gradually reduced, and the separation of oil and water is achieved. The main function of the lower baffle 12 is to increase the flow distance of water in the oil separator 2, so that the oil can fully float up.

[0039] A clean water chamber 17 is separated from the third compartment 15 and the water outlet 6 by an upper baffle 16. The water outlet 6 is connected to the clean water chamber 17. The upper baffle 16 is fixedly connected between two opposite side walls of the grease trap 2. The top of the upper baffle 16 is at the same height as the top of the grease trap 2. A spacing is provided between the bottom of the upper baffle 16 and the bottom of the grease trap 2.

[0040] like Figure 2 As described above, by providing the clean water chamber 17 , the amount of oil flowing toward the water outlet 6 can be further reduced.

[0041] The top of the grease trap 2 is detachably connected with a main cover 19 and an auxiliary cover 18 . The auxiliary cover 18 is correspondingly arranged on the top of the clean water chamber 17 , and the main cover 19 is correspondingly arranged on the top of the first compartment 13 , the second compartment 14 and the third compartment 15 .

[0042] like Figure 2 As shown, during daily use, the operator can conveniently observe the water quality in the clean water chamber 17 by opening the auxiliary cover 18. When the oil needs to be cleaned, the main cover 19 can be opened to facilitate the operation of the oil box 10.

[0043] The artificial wetland 4 is provided with a planting layer 27, a transition layer 28 and a gravel layer 29 from top to bottom. The bottom of the gravel layer 29 is inclined. The lower end of the gravel layer 29 is connected to a water outlet pipe 31. A water inlet assembly is provided in the planting layer 27, and the water inlet assembly is connected to the water outlet end of the anaerobic tank 3.

[0044] like Figure 5 As shown, the planting layer 27 is mainly composed of a mixture of mature soil, peat soil, organic fertilizer, etc., and the planting layer can be planted with plants with developed root systems, such as canna, etc. After the water and water humus discharged from the anaerobic tank 3 enter the planting layer 27, they will be absorbed or decomposed by the plants with developed root systems, playing a "filtering" role. The transition layer 28 is mainly composed of fine gravel, which further filters the sewage. The gravel layer 29 is mainly composed of large-grained gravel. By setting the bottom of the gravel layer 29 at an angle, the finally treated water can automatically flow toward the direction of the outlet pipe 31, and the water can be discharged in time.

[0045] The water inlet assembly includes a plurality of water inlet pipes 30, which are evenly distributed in the planting layer 27. One ends of the plurality of water inlet pipes 30 are respectively connected to the water outlet ends of the anaerobic tank 3. The plurality of water inlet branch pipes 32 are vertically connected to the plurality of water inlet pipes 30. The plurality of water inlet branch pipes 32 are located in the planting layer 27, and the tops of the plurality of water inlet branch pipes 32 are arranged close to the top of the planting layer 27. The tops of the side walls of the water inlet branch pipes 32 are provided with a plurality of water outlets 33.

[0046] like Figure 5 and Figure 6 As shown, the water inlet pipes 30 are evenly distributed in the planting layer 27, and the sewage is evenly discharged on the surface of the artificial wetland 4 through a plurality of water inlet branches 32. By providing a plurality of water inlet branches 32, the flow rate of the water discharged from each water inlet branch 32 can be effectively reduced. At the same time, a plurality of water outlets 33 are provided on each water inlet branch 32 and arranged on the side wall, which can further reduce the water flow rate, avoid the scouring of the soil by the sewage flow after long-term use, and improve the working stability of the entire sewage treatment system.

Claims

1. A system for treating domestic wastewater using artificial wetlands, characterized in that: The invention comprises an anaerobic tank (3), an artificial wetland (4) connected to the water outlet of the anaerobic tank (3), a septic tank (1) and a grease trap (2); the water outlet of the septic tank (1) and the water inlet (5) of the grease trap (2) are connected to the water inlet of the anaerobic tank (3); the grease trap (2) is also provided with a plurality of rapid oil removal components; a residue filter assembly is provided at one end of the grease trap (2) close to the water inlet (5); the grease trap (2) is divided into a first compartment (13), a second compartment (14), a third compartment (15) and a clean water chamber (17) in the horizontal direction by a plurality of partitions; the water inlet (5) is connected to the first compartment (13) and the water outlet (6); the residue filter assembly is located at the first compartment (13) and the second compartment (14) and the third compartment (15) and the clean water chamber (17); The oil removal assembly comprises two groups of slide rails (9) respectively arranged on two opposite side walls of the oil separator (2), the two groups of slide rails (9) are respectively slidably connected with bearing blocks (20), an oil container (10) is detachably connected between the two groups of bearing blocks (20), and the height of the oil container (10) between the two groups of bearing blocks (20) is adjusted by a height adjustment member; the artificial wetland (4) is provided with a planting layer (27), a transition layer (28) and a gravel layer (29) in sequence from top to bottom, the bottom of the gravel layer (29) is inclined, the lower end of the gravel layer (29) is connected with a water outlet pipe (31), and the planting layer (27) is connected with the water outlet end of the anaerobic tank (3).

2. The system for treating domestic wastewater using artificial wetlands according to claim 1, characterized in that: The isolation basket (7) is detachably connected to the first compartment (13); an opening is provided at the top of the isolation basket (7); the isolation basket (7) is located below the water inlet (5); and the water inlet (5) and the opening of the isolation basket (7) are provided correspondingly.

3. The system for treating domestic wastewater using artificial wetlands according to claim 1, characterized in that: The top of the grease trap (2) is also provided with a main cover plate (19) and an auxiliary cover plate (18) which are detachably connected; the auxiliary cover plate (18) is correspondingly arranged on the top of the clean water chamber (17), and the main cover plate (19) is correspondingly arranged on the tops of the first compartment (13), the second compartment (14) and the third compartment (15).

4. The system for treating domestic wastewater using artificial wetlands according to claim 3, characterized in that: The height adjustment member comprises a slide groove (24) vertically opened on the bearing block (20) and two groups of second sliders (25) respectively fixedly connected to two opposite outer walls of the oil container (10); the second sliders (25) are slidably connected in the two groups of the bearing blocks (20) through the openings, the bottoms of the two groups of the slide grooves (24) are respectively fixedly connected with springs (26), and the tops of the two groups of the springs (26) are respectively arranged corresponding to the bottoms of the two groups of the second sliders (25).

5. The system for treating domestic wastewater using artificial wetlands according to claim 1, characterized in that: The partition comprises an upper partition (11) and a lower partition (12), wherein the upper partition (11) is fixedly connected between two opposite side walls of the grease trap (2); the lower partition (12) is fixedly connected to two opposite side walls of the grease trap (2), and the bottom of the lower partition (12) is fixedly connected to the bottom of the grease trap (2).

6. The system for treating domestic wastewater using artificial wetlands according to claim 5, characterized in that: The top of the upper partition (11) is at the same height as the top of the grease trap (2), a gap is provided between the bottom of the lower partition (11) and the bottom of the grease trap (2), the bottom of the lower partition (12) is fixedly connected to the bottom of the grease trap (2), and a gap is provided between the top of the lower partition (12) and the top of the grease trap (2).

7. The system for treating domestic wastewater using artificial wetlands according to claim 1, characterized in that: A clean water chamber (17) is separated between the third compartment (15) and the water outlet (6) by an upper baffle (16), and a gap is provided between the bottom of the upper baffle (16) and the bottom of the grease trap (2).

8. The system for treating domestic wastewater using artificial wetlands according to claim 1, characterized in that: A plurality of water inlet pipes (30) are also provided. The plurality of water inlet pipes (30) are evenly distributed in the planting layer (27). The water inlet pipes (30) are connected to the water outlet end of the anaerobic tank (3). A water inlet branch pipe (32) is vertically connected to the water inlet pipe (30). The water inlet branch pipe (32) is located in the planting layer (27).

9. The system for treating domestic wastewater using artificial wetlands according to claim 8, characterized in that: A handle (23) is fixedly connected inside the oil container (10), and the top of the handle (23) is higher than the top of the oil container (10); and inclined surfaces (21) are respectively provided on both sides of the bearing block (20).

10. The system for treating domestic wastewater using artificial wetlands according to claim 2, characterized in that: A handle (8) is fixedly connected to the isolation basket (7), and the handle (8) is arranged close to the top of the grease trap (2).

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