Sewage treatment ecological recycling system and method

Abstract

The invention provides an ecological recycling system and method for sewage treatment, and the system comprises a physicochemical treatment unit which is internally provided with a filtering grid; the physicochemical treatment unit is connected with a biochemical treatment unit, the biochemical treatment unit is connected with an ecological treatment unit, and the ecological treatment unit comprises a constructed wetland and an oxidation pond; the recycling unit is connected with the ecological treatment unit, and the recycling unit is used for recycling sewage treated by the physicochemical treatment unit, the biochemical treatment unit and the ecological treatment unit; a solar photovoltaic power supply module, wherein the solar photovoltaic power supply module is connected with the recycling unit; and the sludge resource utilization unit is connected with the physicochemical treatment unit and the biochemical treatment unit. The sewage is treated, the treated water is recycled, and the generated sludge is used as a forest fertilizer on the spot, so that resource utilization can be effectively carried out, and zero emission of the sewage and the sludge is realized.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to a sewage treatment ecological reuse system and method. Background Art

[0002] Water is an important material resource for the survival and development of human society. It is an indispensable and irreplaceable special resource. With the rapid development of social economy, the demand for water in human society is increasing. In addition, the unscientific use of water in human society and the waste of water resources and pollution of the water environment caused by the extensive production methods have caused a sharp decline in available water resources year by year. Therefore, it is urgent to solve the shortage of water resources, restore a good water environment, and alleviate the water resource crisis. In order to alleviate the contradiction of insufficient water resources, the resource recycling and utilization of sewage has become extremely important.

[0003] Wastewater reuse is one of the main components of wastewater resource utilization, with obvious economic, ecological and social benefits, and its indirect and long-term benefits are difficult to estimate. However, the various sewage treatment methods currently widely used simply eliminate various pollutants without effectively utilizing them as resources. Summary of the invention

[0004] The present invention provides a sewage treatment ecological reuse system and method to solve the technical problems of high energy consumption in sewage treatment and low resource utilization of treated sewage and sludge.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a sewage treatment ecological reuse system, comprising: a physicochemical treatment unit, wherein a filter grille is arranged in the physicochemical treatment unit; the physicochemical treatment unit is connected to a biochemical treatment unit, wherein the biochemical treatment unit is connected to an ecological treatment unit, wherein the ecological treatment unit comprises an artificial wetland and an oxidation pond; a reuse unit, wherein the reuse unit is connected to the ecological treatment unit, and wherein the reuse unit is used for reusing sewage treated by the physicochemical treatment unit, the biochemical treatment unit and the ecological treatment unit; a solar photovoltaic power supply module, wherein the solar photovoltaic power supply module is connected to the reuse unit; and a sludge resource utilization unit, wherein the sludge resource utilization unit is connected to the physicochemical treatment unit and the biochemical treatment unit.

[0007] In this technical solution, by treating sewage, reusing the treated water, and using the generated sludge as forest fertilizer on site, resources can be effectively utilized to achieve zero discharge of sewage sludge.

[0008] Preferably, the biochemical treatment unit is composed of a plurality of anoxic tanks, a plurality of aerobic tanks and a sedimentation tank; the plurality of anoxic tanks and the plurality of aerobic tanks are alternately connected in sequence, and the sedimentation tank is arranged between the biochemical treatment unit and the ecological treatment unit.

[0009] In this technical solution, the anoxic tank and the aerobic tank are connected alternately in sequence to carry out multi-stage ecological treatment to remove pollutants such as organic matter, ammonia nitrogen, etc. in the sewage, and after treatment, precipitation is carried out in the sedimentation tank.

[0010] Preferably, the aerobic tank includes a tank body, a connecting pipe and an aeration pump. A fixing frame is fixedly installed on the outer wall of the tank body, and the fixing frame is fixedly connected to the aeration pump. The output end of the aeration pump is fixedly connected to a delivery pipe, and the end of the delivery pipe away from the aeration pump is fixedly connected to the middle of the connecting pipe. The connecting pipe is arranged in the tank body, and sealing disks are fixedly installed at both ends of the connecting pipe. One side of the connecting pipe is fixedly connected to a plurality of equally spaced branch pipes, and a sealing head is fixedly installed at one end of the branch pipe away from the connecting pipe, and a plurality of aeration ports are evenly spaced at the top of the branch pipe.

[0011] In this technical solution, the sewage entering the aerobic tank is aerated by the arrangement of an aeration pump and pipe fittings.

[0012] Preferably, the top of the branch pipe is fixedly connected to a connection port, the bottom of the aeration port is fixedly connected to a bottom cover, the bottom cover is cooperatively connected to the connection port, a carrier ring is fixedly connected to the inner wall of the connection port, a sealing gasket is fixedly installed on the carrier ring, and the sealing gasket fits the bottom surface of the bottom cover.

[0013] In the technical solution, the bottom cover is inserted into the connection port, and after the connection is established, a sealing gasket is used to provide sealing for the connection surface.

[0014] Preferably, an annular cavity is formed between the sealing gasket and the top surface of the carrier ring, a plurality of evenly distributed first springs are arranged in the cavity, and a pressure ring is fixedly connected to the top of the first spring.

[0015] In the technical solution, the first spring and the pressure ring are provided to ensure that the sealing gasket fits tightly against the bottom surface of the bottom cover, thereby ensuring the sealing effect.

[0016] Preferably, a plug-in mechanism is provided on both sides of the connecting port, and the plug-in mechanism includes a positioning block, a pull rod and a second spring. The inner wall and outer wall of the connecting port are respectively provided with a guide groove and a guide hole, and the guide groove and the guide hole are communicated. The positioning block is cooperatively connected with the guide groove, and the positioning block is inserted into a slot provided on the outer side wall of the bottom cover. The positioning block is fixedly connected with a pull rod, and the pull rod passes through the guide hole, and the pull rod extends to the outside of the connecting port. A second spring is provided in the guide groove, and the positioning block is elastically connected to the guide groove wall through the second spring.

[0017] In the technical solution, the plug-in mechanism is used to connect the bottom cover with the connection port.

[0018] Preferably, both bottom edges of the bottom cover are provided with extrusion inclined surfaces, and the side of the positioning plug away from the pull rod is provided with a pressure inclined surface.

[0019] Preferably, a protective cover is provided on the top of the aeration port, a vertical rod is fixedly connected to the bottom of the protective cover, the vertical rod passes through the aeration port, a guide ring is sleeved on the bottom end of the vertical rod, fixing rods are fixedly connected on both sides of the guide ring, and the fixing rods are fixedly connected to the inner wall of the bottom cover; a chassis is fixedly installed on the bottom end of the vertical rod.

[0020] In the technical solution, the protective cover is used to protect the aeration port when it is not in operation.

[0021] Preferably, the inner wall of the guide ring is provided with a plurality of circular holes, balls are arranged in each of the plurality of circular holes, and the balls are fitted with the vertical rods.

[0022] In this technical solution, the friction resistance of the vertical rod moving up and down is reduced by the ball.

[0023] Furthermore, the present invention provides a method for ecological reuse of sewage treatment, the method comprising the following steps:

[0024] Step 1: The sewage enters the physical and chemical treatment unit and is physically filtered by the filter grid to remove large debris, hair, and grit in the sewage;

[0025] Step 2: The sewage treated in step 1 is sent to a biochemical treatment unit, where the sewage passes through multiple anoxic tanks and multiple aerobic tanks in sequence to remove organic matter and ammonia nitrogen in the sewage to purify the water quality, and finally precipitates in a sedimentation tank;

[0026] Step 3: The precipitated sewage enters the ecological treatment unit, where it passes through artificial wetlands and oxidation ponds to naturally purify pollutants in the sewage.

[0027] Step 4: After the water treated in step 3 is disinfected, it enters the reuse unit as recycled water. The reuse unit, under the power support provided by the solar photovoltaic power supply module, extracts the recycled water into the water-using equipment for use;

[0028] Step 5: After the wastewater is treated by the physicochemical treatment unit and the biochemical treatment unit, sludge is generated, which is transported and dehydrated by the sludge resource utilization unit and used as forest fertilizer on site.

[0029] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0030] The positive and progressive effects of the present invention are:

[0031] The above-proposed sewage treatment ecological reuse system and method, through the setting of physicochemical treatment units, biochemical treatment units and ecological treatment units, degrades pollutants step by step, improves sewage treatment efficiency, and ensures the quality of treated water at the same time; it also combines solar photovoltaic technology to utilize photovoltaic energy to reduce energy consumption; the set reuse unit utilizes the treated water for landscaping, greening, irrigation, etc., to realize sewage resource utilization; the discharged residual sludge is used on-site as forest fertilizer through the sludge resource utilization unit, to realize sludge resource utilization; in summary, zero discharge of sewage sludge is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the sewage treatment ecological reuse system of the present invention.

[0033] Figure 2 It is a structural schematic diagram of the biochemical treatment unit of the present invention.

[0034] Figure 3 It is a schematic diagram of the structure of the aerobic pool of the present invention.

[0035] Figure 4 For the present invention Figure 3 Schematic diagram of the structure with the A part in the middle enlarged.

[0036] Figure 5 It is a schematic diagram of the structure of the interior of the aeration port and the installation of the aeration port of the present invention.

[0037] Figure 6 For the present invention Figure 5 Schematic diagram of the structure with the B part enlarged.

[0038] Figure 7 It is a schematic diagram of the structure of the aeration port of the present invention when the top end is open.

[0039] Figure 8 For the present invention Figure 7 Schematic diagram of the structure enlarged in the middle C part.

[0040] Description of Reference Numerals

[0041] 1. Physical and chemical treatment unit; 2. Biochemical treatment unit; 201. Anoxic tank; 202. Aerobic tank; 203. Sedimentation tank; 3. Ecological treatment unit; 4. Recycling unit; 5. Solar photovoltaic power supply module; 6. Sludge resource utilization unit; 7. Tank body; 8. Aeration pump; 9. Fixed frame; 10. Delivery pipe; 11. Connecting pipe; 12. Blocking plate; 13. Branch pipe; 1301. Connecting port; 1302. Blocking head; 14. Aeration port; 1401. Bottom cover; 1402. Extrusion slope; 15. Protective cover; 16. Vertical rod; 17. Carrying ring; 18. Fixed rod; 19. Guide ring; 20. Ball; 21. Chassis; 22. Sealing gasket; 23. First spring; 24. Positioning plug; 25. Pull rod; 26. Press ring; 27. Second spring; 28. Guide groove; 29. ​​Guide hole; 30. Slot. DETAILED DESCRIPTION

[0042] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0043] like Figure 1-8 As shown, a sewage treatment ecological reuse system includes: a physicochemical treatment unit 1, in which a filter grid is arranged; the physicochemical treatment unit 1 is connected to a biochemical treatment unit 2, and the biochemical treatment unit 2 is connected to an ecological treatment unit 3, and the ecological treatment unit 3 includes an artificial wetland and an oxidation pond; a reuse unit 4, which is connected to the ecological treatment unit 3 and is used for reusing sewage treated by the physicochemical treatment unit 1, the biochemical treatment unit 2 and the ecological treatment unit 3; a solar photovoltaic power supply module 5, which is connected to the reuse unit 4; and a sludge resource utilization unit 6, which is connected to the physicochemical treatment unit 1 and the biochemical treatment unit 2.

[0044] The biochemical treatment unit 2 is composed of a plurality of anoxic pools 201 , a plurality of aerobic pools 202 and a sedimentation pool 203 ; the plurality of anoxic pools 201 and the plurality of aerobic pools 202 are alternately connected in sequence, and the sedimentation pool 203 is arranged between the biochemical treatment unit 2 and the ecological treatment unit 3 .

[0045] In the above, the physical and chemical treatment unit 1 is specifically as follows: after the domestic sewage is collected, it passes through a screen, a regulating tank / sedimentation / sand settling, etc. to remove large debris, hair, gravel, etc. in the sewage, and to homogenize and adjust the water quantity and quality.

[0046] The biochemical treatment unit 2 is provided with a plurality of anoxic tanks 201 and a plurality of aerobic tanks 202. A certain proportion of fixed fillers are filled in the anoxic tanks 201 and the aerobic tanks 202. An anaerobic tank can also be added according to the water quality requirements of the recycled water and whether phosphorus removal is required; the anoxic tanks 201 and the aerobic tanks 202 are alternately connected in sequence to form a multi-stage biochemical treatment system, a plug flow reaction, and step-by-step degradation of pollutants. Different levels form dominant bacterial communities with different functions, giving full play to the synergistic effect between different types of bacterial communities, thereby greatly improving the sewage treatment efficiency. The biochemical unit is provided with a sludge return system and an aeration structure. It is used to remove organic matter, ammonia nitrogen and other pollutants in sewage to achieve the purpose of purifying water quality.

[0047] The ecological treatment unit 3 includes artificial wetlands, oxidation ponds, and land treatment systems. It uses the inherent natural purification effects of soil, ponds, plants, and sunlight on pollutants to form a virtuous cycle of natural purification ecosystems, and further removes pollutants on the basis of the biochemical unit. The effluent from the ecological unit enters the reuse unit 4 after passing through the disinfection facility.

[0048] The recycling unit 4 is provided with a water recycling pool. The treated water reaches the water recycling standard and enters the water recycling pool. The water is pumped and transported by a pump body and can be used for landscape, greening, irrigation, fish / shrimp farming, industrial cooling circulating water, etc., realizing the resource utilization of sewage. At the same time, the solar photovoltaic power supply module 5 is used for power supply to achieve energy saving and environmental protection.

[0049] The sludge resource utilization unit 6 is configured with a sludge storage tank and mobile sludge dewatering equipment. The sludge is stored in the sludge storage tank. The sludge in the sludge storage tank is dewatered on-site by the mobile sludge dewatering equipment. The dewatered sludge is then used as forest fertilizer on-site or is composted with straw, rice straw, etc. and used as forest fertilizer, thereby realizing on-site resource utilization.

[0050] A conveying structure is provided between the sludge storage tank and the sedimentation tank 203 and the physicochemical treatment unit 1 to convey the sludge into the sludge storage tank, and a screw conveyor may be used specifically.

[0051] like Figure 3 As shown, the aerobic tank 202 includes a tank body 7, a connecting pipe 11 and an aeration pump 8. A fixing frame 9 is fixedly installed on the outer wall of the tank body 7, and the fixing frame 9 is fixedly connected to the aeration pump 8. The output end of the aeration pump 8 is fixedly connected with a delivery pipe 10, and the end of the delivery pipe 10 away from the aeration pump 8 is fixedly connected to the middle of the connecting pipe 11. The connecting pipe 11 is arranged in the tank body 7, and both ends of the connecting pipe 11 are fixedly installed with a plugging disk 12. One side of the connecting pipe 11 is fixedly connected with a plurality of equally spaced branch pipes 13, and the end of the branch pipe 13 away from the connecting pipe 11 is fixedly installed with a plugging head 1302, and a plurality of aeration ports 14 are evenly spaced at the top of the branch pipe 13.

[0052] The aeration structure mentioned above is specifically an aeration pump 8; the operation is intermittent and automatically controlled by time to save energy consumption.

[0053] When the sewage in the aerobic pool 202 is aerated, the aeration airflow is introduced into the delivery pipe 10 through the aeration pump 8, enters the connecting pipe 11, is divided into multiple branch pipes 13, and then discharged through the aeration port 14 to achieve aeration.

[0054] like Figure 5-7 As shown, a protective cover 15 is provided at the top of the aeration port 14, and a vertical rod 16 is fixedly connected to the bottom of the protective cover 15. The vertical rod 16 passes through the aeration port 14, and a guide ring 19 is sleeved on the bottom end of the vertical rod 16. Fixed rods 18 are fixedly connected on both sides of the guide ring 19, and the fixed rods 18 are fixedly connected to the inner wall of the bottom cover 1401; a chassis 21 is fixedly installed at the bottom end of the vertical rod 16.

[0055] The inner wall of the guide ring 19 is provided with a plurality of circular holes, each of which is provided with a ball 20 , and the ball 20 is in contact with the vertical rod 16 .

[0056] In specific operation, the aeration pump 8 is intermittent. When air is introduced into the aeration port 14, the air pressure pushes the protective cover 15 upward to open the aeration port 14. Figure 7 As shown, when the aeration port 14 is not working, no airflow flows therein, and the protective cover 15 covers the top of the aeration port 14 by gravity to protect it from dirt entering.

[0057] The up and down movement of the protective cover 15 is guided by the vertical rod 16 and the guide ring 19. At the same time, a ball 20 is arranged on the guide ring 19 to reduce the friction resistance during the up and down movement.

[0058] like Figure 5-8 As shown, the top of the branch pipe 13 is fixedly connected to a connecting port 1301, the bottom of the aeration port 14 is fixedly connected to a bottom cover 1401, the bottom cover 1401 is cooperatively connected to the connecting port 1301, the inner wall of the connecting port 1301 is fixedly connected to a carrier ring 17, a sealing gasket 22 is fixedly installed on the carrier ring 17, and the sealing gasket 22 is in contact with the bottom surface of the bottom cover 1401.

[0059] An annular cavity is formed between the sealing gasket 22 and the top surface of the carrier ring 17 . A plurality of evenly distributed first springs 23 are arranged in the cavity, and a pressure ring 26 is fixedly connected to the top of the first spring 23 .

[0060] A plug-in mechanism is provided on both sides of the connection port 1301, and the plug-in mechanism includes a positioning block 24, a pull rod 25 and a second spring 27. The inner wall and outer wall of the connection port 1301 are respectively provided with a guide groove 28 and a guide hole 29, and the guide groove 28 and the guide hole 29 are communicated. The positioning block 24 is matched and connected with the guide groove 28, and the positioning block 24 is inserted into a slot 30 provided on the outer wall of the bottom cover 1401. The positioning block 24 is fixedly connected with the pull rod 25, and the pull rod 25 passes through the guide hole 29, and the pull rod 25 extends to the outside of the connection port 1301. A second spring 27 is provided in the guide groove 28, and the positioning block 24 is elastically connected to the wall of the guide groove 28 through the second spring 27.

[0061] The bottom edges of both sides of the bottom cover 1401 are provided with extrusion inclined surfaces 1402 , and the side of the positioning plug block 24 away from the pull rod 25 is provided with a pressure inclined surface.

[0062] The aeration port 14 is inserted into the connection port 1301 through the bottom cover 1401, and is positioned by a plug-in mechanism to maintain the installed state; when disassembling the aeration port 14, a staff member pulls the pull rods 25 of the two plug-in mechanisms with both hands to pull out the positioning plug 24 from the slot 30 to cancel the positioning, and another staff member lifts the aeration port 14 to pull out the bottom cover 1401 from the connection port 1301 to complete the disassembly.

[0063] When installing the aeration port 14, the bottom cover 1401 is inserted into the connection port 1301, and the compression slopes 1402 on both sides of the bottom cover 1401 are used to extrude the compression slopes of the positioning plug 24, so that the compression slopes enter the guide groove 28, and the second spring 27 is compressed at the same time. At the same time, the bottom surface of the bottom cover 1401 contacts the sealing gasket 22, and the sealing gasket 22 is pressed down to compress the first spring 23 until the first spring 23 is completely compressed, and the slot 30 is aligned with the positioning plug 24. The positioning plug 24 is inserted into the slot 30 by the elastic force of the second spring 27 to complete the installation. At the same time, the elastic force of the first spring 23 presses the sealing gasket 22 against the bottom surface of the bottom cover 1401 through the pressure ring 26 to form a seal.

[0064] The above design facilitates the disassembly, assembly and replacement of the aeration port 14 .

[0065] A method for ecological reuse of sewage treatment, comprising the following steps:

[0066] Step 1: The sewage enters the physical and chemical treatment unit 1 and is physically filtered by the filter grid to remove large debris, hair, and gravel in the sewage;

[0067] Step 2: The sewage treated in step 1 is sent to the biochemical treatment unit 2, and the sewage passes through multiple anoxic tanks 201 and multiple aerobic tanks 202 in sequence to remove organic matter and ammonia nitrogen in the sewage to purify the water quality, and finally precipitates in the sedimentation tank 203;

[0068] Step 3: The precipitated sewage enters the ecological treatment unit 3, and the pollutants in the sewage are naturally purified through the artificial wetland and oxidation pond in the ecological treatment unit 3;

[0069] Step 4: After the water treated in step 3 is disinfected, it enters the reuse unit 4 as reuse water. Under the power support provided by the solar photovoltaic power supply module 5, the reuse unit 4 extracts the reuse water into the water-using equipment for use;

[0070] Step 5: After the wastewater is treated by the physicochemical treatment unit 1 and the biochemical treatment unit 2, sludge is generated, which is transported and dehydrated by the sludge resource utilization unit 6 and used as forest fertilizer on site.

[0071] The present invention is not limited to the above-mentioned embodiments. Any changes in shape or structure are within the protection scope of the present invention. The protection scope of the present invention is defined by the attached claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications are within the protection scope of the present invention.

Claims

1. A sewage treatment ecological reuse system, characterized in that: include: A physicochemical treatment unit (1), wherein a filtering grid is arranged in the physicochemical treatment unit (1); the physicochemical treatment unit (1) is connected to a biochemical treatment unit (2), and the biochemical treatment unit (2) is connected to an ecological treatment unit (3), and the ecological treatment unit (3) comprises an artificial wetland and an oxidation pond; A recycling unit (4), the recycling unit (4) is connected to the ecological treatment unit (3), and the recycling unit (4) is used to reuse the sewage after being treated by the physicochemical treatment unit (1), the biochemical treatment unit (2) and the ecological treatment unit (3); A solar photovoltaic power supply module (5), wherein the solar photovoltaic power supply module (5) is connected to the recycling unit (4); A sludge resource utilization unit (6), wherein the sludge resource utilization unit (6) is connected to the physicochemical treatment unit (1) and the biochemical treatment unit (2).

2. A sewage treatment ecological reuse system as claimed in claim 1, characterized in that: The biochemical treatment unit (2) is composed of a plurality of anoxic pools (201), a plurality of aerobic pools (202) and a sedimentation pool (203); the plurality of anoxic pools (201) and the plurality of aerobic pools (202) are connected alternately in sequence, and the sedimentation pool (203) is arranged between the biochemical treatment unit (2) and the ecological treatment unit (3).

3. A sewage treatment ecological reuse system as claimed in claim 2, characterized in that: The aerobic pool (202) comprises a pool body (7), a connecting pipe (11) and an aeration pump (8); a fixing frame (9) is fixedly mounted on the outer wall of the pool body (7); the fixing frame (9) is fixedly connected to the aeration pump (8); a delivery pipe (10) is fixedly connected to the output end of the aeration pump (8); an end of the delivery pipe (10) away from the aeration pump (8) is fixedly connected to the middle of the connecting pipe (11); the connecting pipe (11) is arranged in the pool body (7); and sealing disks (12) are fixedly mounted on both ends of the connecting pipe (11); one side of the connecting pipe (11) is fixedly connected to a plurality of equally spaced branch pipes (13); and a sealing head (1302) is fixedly mounted on the end of the branch pipe (13) away from the connecting pipe (11); and a plurality of aeration ports (14) are evenly spaced at the top of the branch pipe (13).

4. A sewage treatment ecological reuse system as claimed in claim 3, characterized in that: The top of the branch pipe (13) is fixedly connected to a connection port (1301), and the bottom of the aeration port (14) is fixedly connected to a bottom cover (1401). The bottom cover (1401) is cooperatively connected to the connection port (1301). A carrier ring (17) is fixedly connected to the inner wall of the connection port (1301). A sealing gasket (22) is fixedly installed on the carrier ring (17), and the sealing gasket (22) is in contact with the bottom surface of the bottom cover (1401).

5. A sewage treatment ecological reuse system as claimed in claim 4, characterized in that: An annular cavity is formed between the sealing gasket (22) and the top surface of the carrier ring (17), a plurality of evenly distributed first springs (23) are arranged in the cavity, and a pressure ring (26) is fixedly connected to the top of the first spring (23).

6. A sewage treatment ecological reuse system as claimed in claim 4, characterized in that: A plug-in mechanism is provided on both sides of the connection port (1301), and the plug-in mechanism includes a positioning block (24), a pull rod (25) and a second spring (27). The inner wall and outer wall of the connection port (1301) are respectively provided with a guide groove (28) and a guide hole (29), and the guide groove (28) and the guide hole (29) are communicated. The positioning block (24) is connected with the guide groove (28), and the positioning block (24) is inserted into a slot (30) provided on the outer wall of the bottom cover (1401). The positioning block (24) is fixedly connected with the pull rod (25), and the pull rod (25) passes through the guide hole (29), and the pull rod (25) extends to the outside of the connection port (1301). A second spring (27) is provided in the guide groove (28), and the positioning block (24) is elastically connected to the guide groove (28) wall through the second spring (27).

7. A sewage treatment ecological reuse system as claimed in claim 6, characterized in that: The bottom edges of both sides of the bottom cover (1401) are provided with extrusion inclined surfaces (1402), and the side of the positioning plug block (24) away from the pull rod (25) is provided with a pressure inclined surface.

8. A sewage treatment ecological reuse system as claimed in claim 4, characterized in that: A protective cover (15) is provided at the top of the aeration port (14), a vertical rod (16) is fixedly connected to the bottom of the protective cover (15), the vertical rod (16) passes through the aeration port (14), a guide ring (19) is sleeved on the bottom end of the vertical rod (16), both sides of the guide ring (19) are fixedly connected to fixing rods (18), and the fixing rods (18) are fixedly connected to the inner wall of the bottom cover (1401); a chassis (21) is fixedly installed at the bottom end of the vertical rod (16).

9. A sewage treatment ecological reuse system as claimed in claim 8, characterized in that: The inner wall of the guide ring (19) is provided with a plurality of circular holes, each of which is provided with a ball (20), and the ball (20) is fitted with the vertical rod (16).

10. A method for ecologically recycling sewage treatment derived from a sewage treatment ecologically recycling system as claimed in any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: The sewage enters the physical and chemical treatment unit (1) and is physically filtered by the filter grid to remove large debris, hair, and gravel in the sewage; Step 2, the sewage treated in step 1 is sent to the biochemical treatment unit (2), and the sewage passes through multiple anoxic tanks (201) and multiple aerobic tanks (202) in sequence to remove organic matter and ammonia nitrogen in the sewage to purify the water quality, and finally precipitates in the sedimentation tank (203); Step 3: the precipitated sewage enters the ecological treatment unit (3), and is naturally purified of pollutants in the sewage through artificial wetlands and oxidation ponds in the ecological treatment unit (3); Step 4: After the water treated in step 3 is disinfected, it enters the recycling unit (4) as recycled water. The recycling unit (4) draws the recycled water into the water-using equipment for use under the power support provided by the solar photovoltaic power supply module (5); Step 5: After the wastewater is treated by the physicochemical treatment unit (1) and the biochemical treatment unit (2), sludge is generated, which is transported and dehydrated by the sludge resource utilization unit (6) and used as forest fertilizer on site.

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