Rural domestic sewage treatment and resource utilization system

Abstract

The utility model discloses a rural domestic sewage treatment and resource utilization system, it includes phosphorus removal pool, and the top of phosphorus removal pool lateral wall is equipped with the feed pipe, and the lateral wall of phosphorus removal pool other side is equipped with nitrogen removal pool, and the lateral wall of nitrogen removal pool is equipped with denitrogenation subassembly, and denitrogenation subassembly includes air pump, and air pump output is equipped with the gas pipe, and the other end of gas pipe is equipped with the bellows, and the one end of feed pipe is equipped with the phosphorus removal subassembly, and the lateral wall of phosphorus removal pool and nitrogen removal pool inner chamber is equipped with the water hole, and this kind of rural domestic sewage treatment and resource utilization system, through air pump from the aeration disc carries out aeration, enhances nitrification, and it is convenient to deposit, and denitrification bacteria in the anoxic condition will nitrate nitrogen convert into nitrogen more fully, and it is convenient to carry out denitrogenation, avoids the pollution caused by nitrogen-containing sewage drainage, and it is convenient to extract the sludge, secondly, through the baffle of staggered arrangement convenient sludge separation, and it is convenient to carry out the phosphorus removal, and the phosphorus-containing sludge effectively improves the sewage treatment effect of extraction.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically a rural domestic wastewater treatment and resource utilization system. Background Technology

[0002] Rural domestic sewage is a major factor causing rural environmental pollution. Rural areas are characterized by a much lower per capita water consumption and a much lower per capita discharge of domestic sewage compared to urban areas. However, due to regional constraints, urban sewage treatment models cannot yet be transplanted to rural areas.

[0003] The prior art patent document CN217479282U provides a sewage treatment device for the resource utilization of rural domestic sewage, including a fertilizer extraction tank and a comprehensive treatment tank. The comprehensive treatment tank is divided into an anoxic tank, an aerobic tank, a sludge return tank, a coarse sand filter tank, and an activated carbon filter tank arranged sequentially along the sewage flow direction. The sewage is treated sequentially through the anoxic tank, the aerobic tank, the coarse sand filter tank, and the activated carbon filter tank, which can effectively reduce the concentration of rural sewage discharge and the pollutant load on rivers. When there is a need for fertilizer, sludge can be taken out from the fertilizer extraction port for composting or made into dry pellet fertilizer, which can be used in conjunction with the treated sewage to irrigate crops, thereby realizing the resource utilization of rural domestic sewage.

[0004] Although the existing technology has many beneficial effects, the following problems still exist: during the use of the device, it is inconvenient to perform denitrification, and the discharge of nitrogen-containing wastewater can easily cause pollution. It is also inconvenient to remove the settled sludge by relying solely on the opening. Secondly, during the use of the device, it is inconvenient to perform dephosphorization, and the wastewater treatment effect is not good enough, which needs to be improved. In view of this, we propose a rural domestic wastewater treatment and resource utilization system. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] 1. Technical problems to be solved:

[0007] To address the aforementioned problems of inconvenience in denitrification, easy pollution caused by nitrogen-containing wastewater discharge, difficulty in removing precipitated sludge and dephosphorization using only an opening, and insufficient wastewater treatment effect, this utility model is proposed.

[0008] Therefore, the purpose of this utility model is to provide a rural domestic sewage treatment and resource utilization system that facilitates denitrification, avoids pollution caused by nitrogen-containing sewage discharge, facilitates the extraction of settled sludge, facilitates dephosphorization, and effectively improves sewage treatment efficiency.

[0009] 2. Technical Solution:

[0010] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0011] A rural domestic sewage treatment and resource utilization system includes a phosphorus removal tank with a feed pipe at the top of its side wall. A denitrification tank is located on the other side wall of the phosphorus removal tank, and a denitrification assembly is installed on the side wall of the denitrification tank. The denitrification assembly includes an air pump with an air supply pipe at its output end and a corrugated pipe at its other end. An aeration disc is located at the top of the corrugated pipe, and limiting blocks are located on both sides of the outer circumference of the aeration disc. Limiting rails are located on both side walls of the inner cavity of the denitrification tank. A cylinder located at the top of one of the limiting blocks is positioned at the top of the denitrification tank. A suction pump is located on the other side of the top of the denitrification tank, with a sludge discharge pipe at its output end. The phosphorus removal assembly is located at one end of the feed pipe. Water passage holes are provided on the side walls of both the phosphorus removal tank and the denitrification tank. The air pump and suction pump are electrically connected to an external power source, and the cylinder is connected to an external air pump pipeline. The aeration disc facilitates water flow agitation, ensuring more thorough and complete denitrification.

[0012] As a preferred embodiment of the rural domestic sewage treatment and resource utilization system of this utility model, the phosphorus removal component includes a guide pipe, multiple baffles are provided on the inner wall of the phosphorus removal tank, a sludge storage hopper is provided at the bottom of the inner cavity of the phosphorus removal tank, multiple support blocks are provided on the top of the sludge storage hopper, a microporous plate is provided on the top of the support blocks, and baffles are provided at both ends of the top of the microporous plate. The inclined sides of the microporous plate facilitate the sludge to settle to the bottom by gravity, resulting in high sludge discharge efficiency.

[0013] As a preferred embodiment of the rural domestic sewage treatment and resource utilization system of this utility model, the size and position of the limiting block are matched with the size and position of the limiting rail, and the bottom of the air pump is provided with a support plate located at the bottom of the side wall of the denitrification tank.

[0014] As a preferred embodiment of the rural domestic sewage treatment and resource utilization system of this utility model, the sludge discharge pipe is configured as a three-way structure, and the two inlet ends of the sludge discharge pipe are respectively located in the lower part of the inner cavity of the phosphorus removal tank and the nitrogen removal tank.

[0015] As a preferred embodiment of the rural domestic sewage treatment and resource utilization system of this utility model, the plurality of baffles are divided into two groups that are inclined in opposite directions, and the adjacent baffles are staggered.

[0016] In a preferred embodiment of this utility model's rural domestic sewage treatment and resource utilization system, the length of the microporous plate is less than the length of the sludge storage hopper, and the top height of the baffle is lower than the top of the phosphorus removal tank's inner cavity. The baffle's height being lower than the top of the phosphorus removal tank's inner cavity avoids obstructing sewage flow.

[0017] As a preferred embodiment of the rural domestic sewage treatment and resource utilization system of this utility model, the denitrification tank is provided with a drain pipe on its side wall, a shut-off valve is provided on the inner circumference of the drain pipe, and a water storage tank is provided at the other end of the drain pipe.

[0018] 3. Beneficial effects:

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This rural domestic sewage treatment and resource utilization system uses an air pump to aerate from the aeration discs, enhancing the nitrification reaction. During sedimentation, denitrifying bacteria can more fully convert nitrate nitrogen into nitrogen gas under anaerobic conditions, facilitating denitrification and avoiding pollution caused by nitrogen-containing sewage discharge. It also facilitates the extraction of settled sludge, and the water quality can be purified by plants in the ecological wetland before irrigating vegetable gardens and orchards, thus facilitating the resource utilization of sewage after treatment.

[0021] This rural domestic sewage treatment and resource utilization system uses staggered baffles to facilitate mud-water separation, make phosphorus removal easier, and extract phosphorus-containing sludge to effectively improve sewage treatment efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0023] Figure 1 This is a schematic diagram of the overall structure of a rural domestic sewage treatment and resource utilization system according to the present invention;

[0024] Figure 2 This is a schematic cross-sectional view of the denitrification tank structure of a rural domestic sewage treatment and resource utilization system according to this utility model;

[0025] Figure 3 This is a schematic diagram of the denitrification component structure of a rural domestic sewage treatment and resource utilization system according to this utility model;

[0026] Figure 4This is a schematic diagram of the dephosphorization component structure of a rural domestic sewage treatment and resource utilization system according to this utility model;

[0027] Figure 5 This is a schematic cross-sectional view of the sludge storage hopper structure of a rural domestic sewage treatment and resource utilization system according to this utility model.

[0028] The following are the labels in the diagram: 1. Phosphorus removal tank; 2. Feed pipe; 3. Nitrogen removal tank; 4. Denitrification assembly; 5. Phosphorus removal assembly; 6. Water passage hole; 7. Drainage pipe; 8. Shut-off valve; 9. Water storage tank; 401. Air pump; 402. Air supply pipe; 403. Corrugated pipe; 404. Aeration disc; 405. Limiting block; 406. Limiting rail; 407. Cylinder; 408. Suction pump; 409. Sludge discharge pipe; 410. Support plate; 501. Guide pipe; 502. Baffle plate; 503. Sludge storage hopper; 504. Support block; 505. Microporous plate; 506. Baffle. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0031] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0034] This utility model provides an overall structural diagram of an embodiment of a rural domestic sewage treatment and resource utilization system, including:

[0035] Please see Figures 1-5 This embodiment of a rural domestic sewage treatment and resource utilization system includes a phosphorus removal tank 1. A feed pipe 2 is welded to the top of the side wall of the phosphorus removal tank 1 for inputting rural domestic sewage. A denitrification tank 3 is welded to the other side wall of the phosphorus removal tank 1. A denitrification assembly 4 is threadedly connected to the side wall of the denitrification tank 3. The denitrification assembly 4 includes an air pump 401. An air supply pipe 402 is connected to the flange at the output end of the air pump 401. A corrugated pipe 403 is threadedly connected to the other end of the air supply pipe 402. The corrugated pipe 403 is designed to accommodate the vertical movement of an aeration disc 404. An aeration disc 404 is threadedly connected to the top of the corrugated pipe 403. Pump 401 pumps gas to aeration disc 404 to aerate it, providing oxygen so that nitrifying bacteria can convert ammonia nitrogen into nitrate nitrogen. During subsequent sedimentation, denitrifying bacteria convert nitrate nitrogen into nitrogen gas under anaerobic conditions, releasing it into the atmosphere for denitrification. Limiting blocks 405 are threaded onto both sides of the outer circumference of aeration disc 404. Limiting rails 406 are welded to both sides of the inner wall of the denitrification tank 3. The limiting rails 406 restrict the movement of the limiting blocks 405. One of the limiting blocks 405 has an interference fit with a cylinder 407 located at the top of the denitrification tank 3. The cylinder 407 is used to drive the limiting blocks. The movement of the position block 405 drives the aeration disc 404 to move. When the aeration disc 404 aerates outward, sludge cannot enter the holes of the aeration disc 404 and become clogged. When the aeration disc 404 stops, it is easy to move the aeration disc 404 to the top where there is no sludge. A suction pump 408 is threadedly connected to the other side of the top of the denitrification tank 3. The output flange of the suction pump 408 is connected to the sludge discharge pipe 409. The suction pump 408 is used to extract and discharge the nitrogen and phosphorus removal settled sludge from the sludge discharge pipe 409. A dephosphorization component 5 is welded to one end of the feed pipe 2. Water passage holes 6 are opened on the inner side walls of both the phosphorus removal tank 1 and the denitrification tank 3. The water passage holes 6 facilitate the drainage of the phosphorus removal tank. Wastewater after phosphorus removal is introduced into denitrification tank 3. Air pump 401 and suction pump 408 are electrically connected to an external power source. Cylinder 407 is connected to an external air pump pipeline. The modular boxes are assembled to form an ecological wetland. The wetland is connected to the wastewater treatment outlet through pipelines. The number of modular boxes can be increased or decreased according to the water volume and quality. Emergent plants such as iris or calamus are planted on the upper part of the wetland, which can not only purify the water quality but also enhance the landscape effect. The water outlet pipes of the modular boxes are finally collected together for irrigating vegetable gardens and orchards. Check valves are installed on the water outlet pipes to prevent backflow of wastewater during the rainy season and facilitate the resource utilization of treated domestic wastewater.

[0036] It is worth noting that, in order to facilitate phosphorus removal and avoid pollution discharge, the phosphorus removal component 5 specifically includes a guide pipe 501. Multiple baffles 502 are welded to the inner wall of the phosphorus removal tank 1. The baffles 502 are used to collide with the particulate wastewater carrying suspended phosphorus flowing down from the guide pipe 501, causing it to lose kinetic energy and settle, thus achieving uniform water distribution and sludge-water separation for phosphorus removal. A sludge storage hopper 503 is welded to the bottom of the inner cavity of the phosphorus removal tank 1. The sludge storage hopper 503 is used to collect settled phosphorus-containing sludge. Multiple support blocks 504 are welded to the top of the sludge storage hopper 503. A microporous plate 505 is welded to the top of the support blocks 504. The microporous plate 505 is used to support the settled sludge. At the same time, the osmotic pressure causes the residual water in the sludge to flow downward through the micropores. Baffles 506 are welded to both ends of the top of the microporous plate 505. The baffles 506 are used to form channels to allow residual water to flow upward into the wastewater after sludge-water separation.

[0037] Next, to enhance stability, specifically, the size and position of the limiting block 405 are matched with the size and position of the limiting rail 406. The bottom of the air pump 401 is welded with a support plate 410 located at the bottom of the side wall of the denitrification tank 3. The limiting block 405, which matches the size and position of the limiting rail 406, facilitates the movement of the limiting block 405 and prevents the aeration disc 404 from tilting when it moves. The support plate 410 makes the air pump 401 more stable when it is working.

[0038] Meanwhile, in order to prevent excessive sludge accumulation from affecting subsequent sedimentation, the sludge discharge pipe 409 is specifically designed as a three-way structure. The two inlet ends of the sludge discharge pipe 409 are located in the lower part of the inner cavity of the phosphorus removal tank 1 and the nitrogen removal tank 3, respectively. By using the sludge discharge pipe 409 with the two inlet ends located in the lower part of the inner cavity of the phosphorus removal tank 1 and the nitrogen removal tank 3, it is easy to concentrate and extract the sludge and avoid excessive accumulation.

[0039] Furthermore, in order to increase the sewage settling area, specifically, multiple baffles 502 are divided into two groups that are inclined in opposite directions, and adjacent baffles 502 are staggered. The two groups of baffles 502 that are inclined in opposite directions facilitate the flow of sewage and avoid sludge blockage. The staggered arrangement of the baffles 502 also helps to extend the sewage flow path.

[0040] It is worth noting that, in order to facilitate the formation of a water flow space, specifically, the length of the microporous plate 505 is less than the length of the sludge hopper 503, and the top height of the baffle 506 is lower than the top of the inner cavity of the phosphorus removal tank 1. The microporous plate 505, which is shorter than the sludge hopper 503, facilitates the gap between the baffle 506 and the inner cavity side wall of the phosphorus removal tank 1, thus facilitating water flow.

[0041] Finally, to facilitate the discharge of wastewater, specifically, a drain pipe 7 is welded to the side wall of the denitrification tank 3, and a stop valve 8 is threaded onto the inner circumference of the drain pipe 7. A water storage tank 9 is provided at the other end of the drain pipe 7. The stop valve 8 allows for easy control of the wastewater discharged from the drain pipe 7 after denitrification and dephosphorization into the water storage tank 9. The valves and water inlets on the side wall of the water storage tank 9 facilitate the use of this water for agricultural irrigation by rural residents. A water storage pipe is connected to the back side wall of the water storage tank 9. When the ecological wetland is blocked and drainage is not smooth, the wastewater can be directly discharged into the vegetable garden or orchard without passing through the wetland.

[0042] In addition, the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. Furthermore, the scope of protection of this utility model does not involve improvements to the internal structure and methods.

[0043] The device or equipment models mentioned in this article may be as follows:

[0044] Circulation pump 403: IS65-50-140.

[0045] Combination Figures 1-5 The specific usage process of the rural domestic sewage treatment and resource utilization system of this embodiment is as follows:

[0046] 1: When this device is used for rural domestic sewage treatment and resource utilization system, sewage enters denitrification tank 3 through water inlet 6. Air pump 401 is started to drive air into aeration disc 404 through air pipe 402 for aeration. Cylinder 407 is started to move aeration disc 404 to the bottom of sewage, providing oxygen so that nitrifying bacteria can convert ammonia nitrogen into nitrate nitrogen. After aeration disc 404 is moved to the top, air pump 401 is turned off for sedimentation. Denitrifying bacteria convert nitrate nitrogen into nitrogen gas under anaerobic conditions and release it into the atmosphere for denitrification. Suction pump 408 is started to extract the settled sludge.

[0047] 2: Rural domestic sewage is fed into the feed pipe 2 and flows down along the guide pipe 501, impacting the baffle plate 502, separating mud and water, with sludge settling and phosphorus-containing sludge collected at the top of the microporous plate 505. The remaining sewage, under osmotic pressure, passes through the microporous plate 505 and flows upward along the channel formed by the baffle 506 into the sewage after mud-water separation.

[0048] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rural domestic sewage treatment and resource utilization system, characterized in that, The system includes a phosphorus removal tank (1), a feed pipe (2) at the top of the side wall of the phosphorus removal tank (1), a denitrification tank (3) on the other side wall of the phosphorus removal tank (1), a denitrification assembly (4) on the side wall of the denitrification tank (3), the denitrification assembly (4) including an air pump (401), an air supply pipe (402) at the output end of the air pump (401), a corrugated pipe (403) at the other end of the air supply pipe (402), an aeration disc (404) at the top of the corrugated pipe (403), and limiting blocks (405) on both sides of the outer circumference of the aeration disc (404). The denitrification tank (3) Both sides of the inner cavity are provided with limiting rails (406), and one of the limiting blocks (405) is provided with a cylinder (407) located at the top of the denitrification tank (3). The other side of the top of the denitrification tank (3) is provided with a suction pump (408). The output end of the suction pump (408) is provided with a sludge discharge pipe (409). One end of the feed pipe (2) is provided with a dephosphorization component (5). Both the dephosphorization tank (1) and the denitrification tank (3) are provided with water passage holes (6). The air pump (401) and the suction pump (408) are electrically connected to an external power source. The cylinder (407) is connected to an external air pump pipe.

2. The rural domestic sewage treatment and resource utilization system according to claim 1, characterized in that, The dephosphorization assembly (5) includes a guide pipe (501), the inner wall of the dephosphorization tank (1) is provided with multiple baffles (502), the bottom of the inner cavity of the dephosphorization tank (1) is provided with a sludge storage hopper (503), the top of the sludge storage hopper (503) is provided with multiple support blocks (504), the top of the support block (504) is provided with a microporous plate (505), and both ends of the top of the microporous plate (505) are provided with baffles (506).

3. The rural domestic sewage treatment and resource utilization system according to claim 2, characterized in that, The size and position of the limiting block (405) match the size and position of the limiting rail (406), and the bottom of the air pump (401) is provided with a support plate (410) located at the bottom of the side wall of the denitrification tank (3).

4. The rural domestic sewage treatment and resource utilization system according to claim 3, characterized in that, The sludge discharge pipe (409) is configured as a three-way structure, with the two inlet ends of the sludge discharge pipe (409) located in the lower part of the inner cavity of the phosphorus removal tank (1) and the nitrogen removal tank (3), respectively.

5. The rural domestic sewage treatment and resource utilization system according to claim 4, characterized in that, The multiple baffles (502) are divided into two groups that are inclined in opposite directions, and the adjacent baffles (502) are staggered.

6. The rural domestic sewage treatment and resource utilization system according to claim 5, characterized in that, The length of the microporous plate (505) is less than the length of the sludge hopper (503), and the top height of the baffle (506) is lower than the top of the inner cavity of the phosphorus removal tank (1).

7. The rural domestic sewage treatment and resource utilization system according to claim 6, characterized in that, The denitrification tank (3) has a drain pipe (7) on its side wall, and a shut-off valve (8) is provided on the inner circumference of the drain pipe (7). The other end of the drain pipe (7) is provided with a water storage tank (9).

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