Detachable anaerobic reactor and substrate-doped constructed wetland integrated device and use method thereof

Abstract

The invention belongs to the technical field of sewage treatment, and relates to a detachable anaerobic reactor and matrix-doped artificial wetland integrated device which comprises a detachable anaerobic reactor and a sandstone zeolite matrix-doped artificial wetland which are sequentially connected in series, wherein the interior of the detachable anaerobic reactor is divided into a plurality of cells which are sequentially connected in series through detachable baffle plates, and the cells comprise at least one anaerobic cell and a water collecting cell; the sandstone zeolite doped matrix artificial wetland is a horizontal subsurface flow wetland, and a water inlet tank, a treatment area and a water outlet tank are arranged in the sandstone zeolite doped matrix artificial wetland. The invention further discloses a using method of the device. The constructed wetland adopts gravel and zeolite doped matrix, and hydroponic vegetable planting is combined, so that the nitrogen and phosphorus removal efficiency is remarkably enhanced. The integrated device disclosed by the invention combines anaerobic pretreatment and ecological advanced treatment, and has the characteristics of high treatment efficiency, stable operation, strong impact load resistance, simplicity and convenience in management, suitability for distributed rural sewage treatment and the like.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and relates to constructed wetlands, and more particularly to an integrated device and method of using a detachable anaerobic reactor and a substrate-doped constructed wetland. Background Technology

[0002] In recent years, my country's rural economy has developed rapidly, the living standards of rural residents have continuously improved, and the population has continued to grow, resulting in a large amount of rural domestic sewage. Rural domestic sewage mainly includes kitchen wastewater, washing wastewater, toilet flushing wastewater, and wastewater from free-range livestock and poultry, characterized by high organic matter, nitrogen, and phosphorus content. If discharged untreated, it can easily lead to eutrophication or even black and odorous water bodies, affecting the rural living environment. In particular, due to the dispersed population and complex terrain in rural areas, centralized urban sewage treatment models are not suitable. The dispersed discharge points and large fluctuations in water volume further increase the difficulty of sewage treatment. Therefore, it is necessary to develop an efficient decentralized rural sewage treatment technology and treatment equipment.

[0003] Constructed wetlands are widely used in wastewater treatment. Their removal of pollutants primarily relies on adsorption by the packing material, microbial activity, and plant absorption, making them an effective ecological treatment technology for rural domestic sewage. However, the performance and economic viability of the constructed wetland packing material are often crucial factors to consider when putting this technology into operation.

[0004] Considering the treatment efficiency and economy of constructed wetland fillers, a reasonable configuration of the filler material is necessary. Treatment efficiency: Traditional sand and gravel matrix constructed wetlands have a significant effect on phosphorus adsorption, while traditional zeolite matrix constructed wetlands tend to enhance nitrogen removal efficiency. The synergistic effect of the two different substrates may achieve better nitrogen and phosphorus removal results. Economy: Sand and gravel are less expensive than zeolite. Therefore, considering both treatment efficiency and economy, a sand-gravel-zeolite mixed matrix is ​​selected. Considering the high pollutant concentration and large fluctuations in the flow of rural domestic sewage, an anaerobic reactor is added as a pretreatment device to improve the biodegradability of rural domestic sewage, degrade organic matter, and regulate the flow of rural domestic sewage to address fluctuations in flow.

[0005] In rural areas, wastewater discharge is dispersed, water volume fluctuates greatly, and operation and maintenance management capabilities are weak, making it difficult for traditional constructed wetlands to adapt to varying water quality and quantity. The flexible design of anaerobic reactors with detachable baffles allows for adjustment of the water flow channels, enabling rapid adjustment of the number of anaerobic chambers based on actual wastewater flow and quality. This effectively addresses the instability of rural wastewater discharge and avoids the problems of reduced treatment efficiency at low flow rates or overflow at high flow rates encountered with traditional stationary reactors.

[0006] Therefore, this invention discloses an integrated device and method for using a detachable anaerobic reactor and a doped matrix constructed wetland, and applies it to the treatment of rural domestic sewage. Summary of the Invention

[0007] In response to the problems of high pollutant concentration and large fluctuations in water volume in rural domestic sewage, and considering factors such as the performance and economic efficiency of constructed wetland fillers, this invention discloses an integrated device and method of using a detachable anaerobic reactor and a sand-gravel-zeolite doped matrix constructed wetland. The device utilizes technologies such as a detachable anaerobic reactor and a doped matrix constructed wetland to treat rural domestic sewage.

[0008] Technical solution

[0009] An integrated device combining a detachable anaerobic reactor and a doped matrix constructed wetland comprises a detachable anaerobic reactor and a doped matrix constructed wetland connected in series. The detachable anaerobic reactor is internally divided into multiple sequentially connected compartments by detachable baffles, including at least one anaerobic compartment and one water collection compartment. The anaerobic compartment is equipped with elastic three-dimensional packing material. The water collection compartment contains a filter media layer composed of filter plates and lightweight granular filter media filled therebetween. The detachable anaerobic reactor has an inlet valve and an outlet valve connected to the sand-gravel-zeolite doped matrix constructed wetland. The doped matrix constructed wetland is a horizontal subsurface flow wetland, internally comprising an inlet tank, a treatment zone, and an outlet tank. The treatment zone is filled with a sand-gravel and zeolite doped matrix. Hydroponic vegetables are grown on the surface of the matrix in the treatment zone. The outlet system of the sand-gravel-zeolite doped matrix constructed wetland includes an outlet perforated pipe located in the outlet zone, a rotating outlet pipe connected to the perforated pipe, and a drainage trough.

[0010] In a preferred embodiment of the present invention, the detachable anaerobic reactor is provided with three detachable baffles inside, dividing the reactor into four connected compartments, including three anaerobic compartments and one water collection compartment; one end of each baffle has a rectangular notch, allowing wastewater to flow through the compartments.

[0011] In a preferred embodiment of the present invention, the elastic three-dimensional packing material is a polyolefin or polyamide packing material for attaching anaerobic microorganisms; the filter plate of the filter media layer is two perforated plates arranged vertically, and the lightweight granular filter media is filled between the two plates.

[0012] In a preferred embodiment of the present invention, the water inlet trough of the sand and gravel zeolite-doped artificial wetland is provided with a triangular weir to ensure uniform water distribution; the front and rear ends of the treatment zone are respectively provided with an inlet zone and an outlet zone filled with pebbles.

[0013] In a preferred embodiment of the present invention, the sand and zeolite filler in the treatment zone are a composite matrix with a volume ratio of 1:1 to 3:1, preferably 2:1; the particle size of the sand is 1.4 to 6 mm, and the particle size of the zeolite is 8 to 32 mm; the initial porosity of the composite matrix is ​​30 to 40%.

[0014] In a preferred embodiment of the present invention, the perforated water outlet pipe is located at the bottom of the water outlet area, and two rows of water outlet holes of the same size and arranged in an alternating manner are opened at the bottom of the pipe; the rotating water outlet pipe is a pipe with an elbow and is connected to the perforated water outlet pipe through a detachable connector, for controlling the wetland water level and draining.

[0015] In a preferred embodiment of the present invention, the hydroponic vegetable is water spinach or water celery, which is planted by seedling transplanting at a planting density of 15-25 plants / square meter, preferably 20 plants / square meter.

[0016] The second objective of this invention is to disclose a method for using the aforementioned device.

[0017] A method for using an integrated device combining a detachable anaerobic reactor and a matrix-doped constructed wetland includes the following steps:

[0018] S1. Add anaerobic activated sludge to each anaerobic compartment of the detachable anaerobic reactor, and add simulated rural domestic sewage. The sludge concentration (MLSS) after mixing is controlled at 2000-3000 mg / L. Cover the reactor with the lid. Then, operate in an intermittent influent mode with a hydraulic retention time (HRT) of 1.0-2.0 days until a large amount of biofilm is observed on the elastic three-dimensional packing and the effluent quality is stable, indicating that the anaerobic microorganisms have successfully attached biofilm. Then switch to continuous influent mode.

[0019] S2. Rural domestic sewage enters the detachable anaerobic reactor. Inside the reactor, the sewage flows through the anaerobic chambers sequentially along the channels set by the baffles, making full contact with the elastic three-dimensional packing material attached to the chambers and the anaerobic sludge at the bottom. During this process, some organic pollutants (COD) in the sewage are degraded by anaerobic microorganisms. The pretreated sewage finally enters the water collection chamber, where suspended solids (SS) are intercepted by the light granular filter media layer, and then flows out through the effluent valve.

[0020] S3. Adjust the number of baffles in the detachable anaerobic reactor according to the actual average daily flow of the rural domestic sewage to be treated. When the daily flow is low, the baffles can be removed to reduce the number of baffles so that the corresponding number of anaerobic cells can be activated.

[0021] S4. The pretreated effluent from the anaerobic reactor is introduced into the inlet tank of the sand and zeolite-doped artificial wetland through pipelines. After being evenly distributed by the inlet triangular weir, the inlet water enters the inlet zone filled with pebbles. The wastewater flows evenly through the treatment zone filled with sand and zeolite-doped matrix in a horizontal subsurface flow state. In this area, the deep purification of wastewater is achieved by utilizing the adsorption of ammonia nitrogen and phosphorus by sand and zeolite, the nitrification / denitrification of the matrix surface and microorganisms, and the absorption of nutrients such as nitrogen and phosphorus by hydroponic vegetables.

[0022] S5. The effluent purified by the constructed wetland first passes through the pebble-filled effluent area, and then is evenly collected by the effluent perforated pipe located at the bottom of the area; the effluent is discharged to the drainage trough through the rotating effluent pipe, and the purified effluent can be reused; by rotating the bend angle of the effluent pipe, the water level inside the wetland can be adjusted to meet the growth needs of different aquatic plants or to perform venting operations during system maintenance.

[0023] In a preferred embodiment of the present invention, in step S2, for low flow conditions, such as below 60% of the design flow, the baffles can be removed, and only 1-2 anaerobic compartments can be kept in operation to prevent the wastewater from staying in the reactor for too long and depleting the substrate, causing the denitrifying and phosphorus-removing microorganisms to be in endogenous respiration, which ultimately leads to the death of the microorganisms and a decrease in treatment efficiency.

[0024] For high-flow-rate conditions, such as above 60% of the design flow rate, all baffles should be installed to ensure that all three anaerobic chambers are in operation to provide sufficient treatment capacity and hydraulic retention time and avoid short-circuiting.

[0025] This invention integrates a detachable anaerobic reactor with a matrix-doped constructed wetland for the treatment of rural domestic sewage.

[0026] This invention combines a detachable anaerobic reactor with elastic three-dimensional packing material and lightweight granular filter media. The baffles in the detachable anaerobic reactor allow wastewater to flow through each compartment, ensuring sufficient contact with the bottom sludge and improving pollutant removal efficiency. Furthermore, the detachable baffles can be replaced with baffles, and the problem of large fluctuations in rural domestic sewage volume can be addressed by increasing or decreasing the number of anaerobic compartments. The elastic three-dimensional packing material enables efficient biofilm formation on activated sludge in the reactor, accelerating the separation of sludge and air bubbles, reducing sludge loss, and increasing the specific surface area of ​​the packing material. This allows for sufficient contact between wastewater and the sludge on the packing material, increasing the total sludge volume and enhancing the sludge-water mass transfer effect. The lightweight granular filter media further effectively intercepts lost sludge and suspended solids in the wastewater, reducing suspended solids (SS) in the effluent.

[0027] The horizontal flow constructed wetland in this invention uses a sand-gravel-zeolite mixed matrix, which combines the advantages of sand and gravel for phosphorus removal and zeolite for nitrogen removal, thereby achieving the purpose of enhancing the denitrification and phosphorus removal of rural domestic sewage by constructed wetlands.

[0028] The wetland water inlet of this invention adopts a triangular overflow weir, which is conducive to uniform water distribution in the wetland, effectively improves the water flow pattern, and improves the treatment efficiency; the water outlet adopts a bottom perforated pipe with two rows of staggered drainage holes, which is conducive to uniform collection of water.

[0029] The wetland plants of this invention are hydroponic vegetables, using water celery and water spinach, which are widely distributed and highly adaptable in my country. They are planted alternately in different seasons according to the suitable growth temperature of wetland plants to ensure the ability of wetland plants to purify artificial wetlands. At the same time, water celery and water spinach also have agricultural value and are suitable for promotion and use in rural areas.

[0030] Beneficial effects

[0031] This invention combines a detachable anaerobic reactor with a matrix-doped constructed wetland treatment process, designing it as an integrated device. The detachable anaerobic reactor not only solves the problem of large fluctuations in rural domestic sewage volume but also reduces the pollution load on the constructed wetland influent, effectively preventing clogging. The sand-gravel-doped zeolite constructed wetland achieves effective nitrogen and phosphorus removal. Hydroponic vegetables can absorb pollutants from the sewage, playing a certain auxiliary role in the sewage purification process of the constructed wetland. Furthermore, hydroponic vegetables have agricultural value and are of significant potential for promotion in rural areas. Attached Figure Description

[0032] Figure 1 Plan view of the integrated detachable anaerobic reactor and matrix-coated constructed wetland device;

[0033] Figure 2 1-1 Cross-sectional view of the integrated device of detachable anaerobic reactor and doped matrix constructed wetland;

[0034] Figure 3 2-2 Cross-sectional view of the integrated device of detachable anaerobic reactor and doped matrix constructed wetland;

[0035] Figure 4 Three-view diagram of the detachable baffle structure in a detachable anaerobic reactor;

[0036] Figure 5 Three-view diagram of the removable filter plate structure in a removable anaerobic reactor;

[0037] Figure 6 Three-view drawing of an artificial wetland effluent system with sand and zeolite mixed matrix;

[0038] The components in the diagram are labeled as follows: 1. Anaerobic reactor; 2. Inlet valve; 3. Anaerobic chamber; 4. Water collection chamber; 5. Cover plate; 6. Baffle plate; 7. Filter plate; 8. Elastic three-dimensional packing; 9. Lightweight granular filter media; 10. Outlet valve; 11. Vent valve; 12. Sand-gravel-zeolite mixed matrix artificial wetland; 13. Inlet tank; 14. Inlet triangular weir; 15. Outlet baffle; 16. Inlet area; 17. Treatment area; 18. Outlet area; 19. Outlet perforated pipe; 20. Rotating outlet pipe; 21. Drainage trough; 22. Hydroponic vegetables; 23. Outlet hole; 24. Connector. Detailed Implementation

[0039] The present invention will be described in detail below with reference to embodiments, so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following embodiments.

[0040] Example 1

[0041] An integrated device for a detachable anaerobic reactor and a constructed wetland with a doped matrix includes an anaerobic reactor 1 and a sand-gravel-zeolite doped matrix constructed wetland 12. The anaerobic reactor 1 contains three detachable baffles 6, each with a 300 mm x 100 mm notch at one end, forming four interconnected compartments in the water flow direction: three anaerobic compartments 3 and one water collection (effluent) compartment 4. A cover plate 5 is installed on the top of the reactor, and elastic three-dimensional packing material 8 is placed in the anaerobic compartments. Simultaneously, a filter layer is installed in the water collection (effluent) compartment 4, consisting of two detachable filter plates 7 with perforations for uniform water collection. Lightweight plastic granular filter media 9 with a particle size of 3-5 mm is placed in the filter layer.

[0042] The constructed wetland 12, with a sand-gravel-zeolite mixed substrate, has overall dimensions of 3100 mm × 1000 mm × 700 mm. The effluent from the anaerobic reactor 1 first flows through the inlet channel 13, then overflows through the inlet triangular weir 14 to the inlet zone 16, and subsequently passes through the treatment zone 17 and the effluent zone 18. The main body of the wetland is filled sequentially along the water flow direction with 200 mm wide pebbles (16-32 mm in diameter) as the inlet zone 16; 2300 mm wide graded coarse sand (1.4-6 mm in diameter) mixed with 8-32 mm zeolite as the treatment zone 17 (using a sand-gravel to zeolite volume ratio of 2:1); and 200 mm wide pebbles (16-32 mm in diameter) as the effluent zone 18. Water celery 22 is planted on the substrate surface at a density of 20 plants / m². 2The seedlings are transplanted and the water celery seedlings are 10-15 cm tall. The perforated water outlet pipe 19 is located at the bottom of the water outlet area. There are two rows of staggered water outlet holes 23 at the bottom, which are used to collect water evenly. After passing through the water outlet baffle 15, it is connected to the rotating water outlet pipe 20. The rotating water outlet pipe 20 is a section of water outlet pipe with an elbow and a detachable connector 24, which is used to drain and control the wetland water level. Finally, the water is drained through the water outlet pipe of the drainage trough 21.

[0043] The anaerobic reactor 1 is connected to the artificial wetland inlet trough 13 through the outlet valve 11 of the fourth chamber, and the water is evenly distributed by the triangular weir 14 of the inlet trough.

[0044] The specific operating procedure of the device is as follows:

[0045] First, anaerobic activated sludge was added to anaerobic reactor 1, along with simulated domestic sewage, to achieve a sludge concentration of approximately 2500 mg / L. After settling for 2 days, operation began. Initially, intermittent influent was used with a hRT of 1.0 day. Once the system stabilized and anaerobic microorganisms successfully attached to the biofilm, continuous influent was introduced. Artificial water distribution was used to simulate the quality of rural domestic sewage, including COD... Cr The pH of the influent is adjusted by glucose, ammonium chloride, urea, and potassium dihydrogen phosphate, with sodium bicarbonate added to adjust the pH. Simulated rural domestic sewage enters the anaerobic reactor 1 through inlet valve 2. The sewage flows through each compartment in the anaerobic reactor 1, making full contact with the sludge attached to the elastic three-dimensional packing material 8 and the bottom of each compartment. The organic matter is decomposed by the sludge. After passing through the filter layer 9, the sewage exits and then enters the sand and gravel zeolite mixed substrate artificial wetland 12 through the inlet triangular weir 14. The wetland hydroponic vegetables are water celery or water spinach. Water celery is cold-resistant and suitable for planting in winter and spring. Water spinach is heat-resistant and grows and reproduces quickly, making it suitable for planting in summer and autumn. Wastewater is evenly distributed in the inlet area of ​​the artificial wetland 12 (a mixture of sand and zeolite) by pebbles 16, and flows horizontally through the sand and zeolite treatment area 17. Through the physical, chemical and biological synergistic effects of the substrate, hydroponic vegetables and microorganisms, the wastewater is further purified. Finally, after passing through the effluent area by pebbles 18, the effluent is evenly collected by the effluent perforated pipe 19 and discharged by the rotating effluent pipe 20.

[0046] Tests showed that the average influent COD concentration was... Cr Under the operating conditions of 294.20 mg / L, NH3-N=15.35 mg / L, TN=19.86 mg / L, TP=3.03 mg / L, and HRT=1.0 d, the average effluent concentration of each parameter in the detachable anaerobic reactor is COD. Cr=131.77 mg / L, NH3-N=14.43 mg / L, TN=17.39 mg / L, TP=2.22 mg / L; the average effluent concentrations of various indicators in the sand-gravel-zeolite mixed matrix constructed wetland are COD = 131.77 mg / L, NH3-N = 14.43 mg / L, TN = 17.39 mg / L, TP = 2.22 mg / L; Cr =9.09mg / L, NH3-N=1.63mg / L, TN=3.17mg / L, TP=1.25mg / L.

[0047] The average removal rate of various indicators in the detachable anaerobic reactor is COD. Cr (55.15%), NH3-N (5.96%), TN (12.88%), TP (26.46%); the average removal rate of each index in the sand and gravel zeolite-doped constructed wetland was COD. Cr (92.78%), NH3-N (88.67%), TN (81.84%), TP (43.70%).

[0048] The average total removal rate of various indicators in the detachable anaerobic reactor-sand-zeolite-doped matrix constructed wetland system is COD. Cr (96.92%), NH3-N (89.35%), TN (84.15%), TP (58.80%).

[0049] Example 2

[0050] To further investigate the impact of hydraulic retention time (HRT) on the treatment effect of the integrated device on rural domestic sewage, an operation test with HRT=2.0 d was conducted. This embodiment is a continuation of the operation test based on Example 1, with rural domestic sewage prepared in a simulated manner according to Example 1.

[0051] Tests showed that the average influent COD concentration was... Cr Under the operating conditions of 298.56 mg / L, NH3-N=15.40 mg / L, TN=19.89 mg / L, TP=2.99 mg / L, and HRT=2.0 days, the average effluent concentration of each parameter in the detachable anaerobic reactor is COD. Cr =37.79 mg / L, NH3-N=14.15 mg / L, TN=16.89 mg / L, TP=2.60 mg / L; the average effluent concentrations of various indicators in the sand-gravel-zeolite mixed matrix constructed wetland are COD Cr =8.54 mg / L, NH3-N=1.93mg / L, TN=2.86mg / L, TP=1.52mg / L.

[0052] The average removal rate of various indicators in the detachable anaerobic reactor is COD Cr(87.32%), NH3-N (8.13%), TN (15.00%), TP (12.91%); the average removal rate of each index in the sand and gravel zeolite-doped constructed wetland was COD. Cr (76.39%), NH3-N (86.33%), TN (83.10%), TP (41.66%).

[0053] The average total removal rate of various indicators in the detachable anaerobic reactor-sand-zeolite-doped matrix constructed wetland system is COD. Cr (97.15%), NH3-N (87.46%), TN (85.55%), TP (49.16%)

[0054] Example 3

[0055] To further investigate the impact of hydraulic retention time (HRT) on the treatment effect of the integrated device on rural domestic sewage, an operation test with an HRT of 3.0 days was conducted. This example is a continuation of the operation test based on Example 2, with the rural domestic sewage prepared in a simulated manner according to Example 2.

[0056] Tests showed that the average influent COD concentration was... Cr Under the operating conditions of 296.14 mg / L, NH3-N=15.26 mg / L, TN=20.10 mg / L, TP=2.96 mg / L, and HRT=3.0 days, the average effluent concentration of each parameter in the detachable anaerobic reactor is COD. Cr =30.05 mg / L, NH3-N=14.07 mg / L, TN=17.87 mg / L, TP=2.47 mg / L; the average effluent concentration of each index in the sand-gravel-zeolite mixed matrix constructed wetland is COD Cr =8.82 mg / L, NH3-N=1.55 mg / L, TN=2.13 mg / L, TP=1.21mg / L.

[0057] The average removal rate of various indicators in the detachable anaerobic reactor is COD Cr (89.86%), NH3-N (7.81%), TN (11.06%), TP (16.48%); the average removal rate of each index in the sand and gravel zeolite-doped constructed wetland was COD. Cr (70.25%), NH3-N (88.96%), TN (88.07%), TP (51.15%). The average total removal rate of each index in the detachable anaerobic reactor-sand-zeolite-doped matrix constructed wetland system was COD. Cr (97.02%), NH3-N (89.81%), TN (89.42%), TP (59.26%).

[0058] The embodiments described above are merely specific implementations of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made using the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A detachable anaerobic reactor and doped matrix constructed wetland integrated device, comprising a detachable anaerobic reactor (1) and a sand-gravel-zeolite doped matrix constructed wetland (12) connected in series; characterized in that: The detachable anaerobic reactor (1) is internally divided into multiple sequentially connected compartments by detachable baffles (6), including at least one anaerobic compartment (3) and a water collection compartment (4); the anaerobic compartment (3) is equipped with elastic three-dimensional packing material (8); the water collection compartment (4) is equipped with a filter media layer consisting of a filter plate (7) and lightweight granular filter media (9) filled therebetween; the detachable anaerobic reactor (1) is equipped with an inlet valve (2) and an outlet valve (10) connected to the sand-gravel-zeolite doped matrix artificial wetland (12). The sand-gravel-zeolite doped matrix artificial wetland (12) is a horizontal subsurface flow wetland, which has an inlet trough (13), a treatment zone (17) and a drainage trough (21) arranged sequentially along the water flow direction. The treatment zone (17) is filled with a sand-gravel and zeolite doped matrix. Hydroponic vegetables (22) are planted on the surface of the matrix in the treatment zone (17). The water outlet system of the sand-gravel-zeolite doped matrix artificial wetland (12) includes a perforated water outlet pipe (19) set in the water outlet zone (18), a rotating water outlet pipe (20) connected to the perforated water outlet pipe (19), and a drainage trough (21).

2. The integrated device of detachable anaerobic reactor and doped matrix constructed wetland according to claim 1, characterized in that: The detachable anaerobic reactor (1) is equipped with three detachable baffles (6) inside, which divide the reactor into four connected compartments, including three anaerobic compartments (3) and one water collection compartment (4); one end of the baffle (6) has a rectangular notch, which allows the sewage to flow between the compartments.

3. The integrated device for a detachable anaerobic reactor and a constructed wetland with a doped matrix according to claim 1 or 2, characterized in that, The elastic three-dimensional packing material (8) is a polyolefin or polyamide packing material used for attaching anaerobic microorganisms; the filter plate (7) consists of two perforated plates arranged vertically; and the lightweight granular filter material (9) is filled between the two plates.

4. The detachable anaerobic reactor and doped matrix constructed wetland integrated device according to claim 1, characterized in that, The water inlet channel (13) of the sand and zeolite-doped matrix artificial wetland (12) is provided with a water inlet triangular weir (14); the treatment zone (17) is provided with a water inlet zone (16) and a water outlet zone (18) filled with pebbles at both ends along the water flow direction.

5. The integrated device of detachable anaerobic reactor and doped matrix constructed wetland according to claim 1, characterized in that: The filler in the treatment zone (17) is a composite matrix of sand and zeolite mixed in a volume ratio of 1:1 to 3:1; the particle size of the sand is 1.4 to 6 mm, and the particle size of the zeolite is 8 to 32 mm; the initial porosity of the composite matrix is ​​controlled at 30 to 40%.

6. The integrated device of detachable anaerobic reactor and doped matrix constructed wetland according to claim 5, characterized in that: The volume ratio of sand and zeolite is 2:

1.

7. The integrated device of detachable anaerobic reactor and doped matrix constructed wetland according to claim 1, characterized in that: The perforated water outlet pipe (19) is located at the bottom of the water outlet area (18), and two rows of water outlet holes (23) of the same size and arranged in an alternating manner are opened at the bottom of the pipe; the rotating water outlet pipe (20) is connected to the perforated water outlet pipe (19) through a detachable connector (24), and the rotating water outlet pipe (20) is a pipe with an elbow, used for system venting and controlling wetland water level.

8. The integrated device for a detachable anaerobic reactor and a constructed wetland with a doped matrix according to claim 1, characterized in that: The hydroponic vegetable (22) is water spinach or water celery, with a planting density of 15-25 plants / square meter, preferably 20 plants / square meter.

9. A method of using an integrated device for a detachable anaerobic reactor and a constructed wetland with a doped matrix as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Start the detachable anaerobic reactor (1): Add anaerobic activated sludge to each anaerobic compartment (3) and seal the reactor cover (5); then operate in an intermittent water inlet mode until a biofilm is attached to the elastic three-dimensional packing material (8) and the effluent water quality is stable, then switch to continuous water inlet mode. S2. Wastewater enters the detachable anaerobic reactor (1) through the inlet valve (2), and flows through each anaerobic chamber (3) in sequence. It comes into contact with the elastic three-dimensional packing material (8) and anaerobic sludge to degrade organic matter. Then it enters the water collection chamber (4) and after the filter layer intercepts suspended solids, it flows out through the outlet valve (10). S3. Adjust the number of activated anaerobic chambers (3) by increasing or decreasing the number of baffles based on the actual average daily flow rate of the wastewater to be treated. S4. The pretreated effluent enters the inlet trough (13) of the artificial wetland (12) with sand and zeolite doped matrix. After being evenly distributed by the inlet triangular weir (14), the horizontal subsurface flows through the treatment zone (17) filled with sand and zeolite doped matrix. The water is deeply purified through the physical and chemical adsorption of the matrix, the nitrification / denitrification of microorganisms and the absorption of hydroponic vegetables (22). S5. The purified water is collected by the perforated pipe (19) in the water outlet area (18) and discharged to the water outlet trough (21) through the rotating water outlet pipe (20). The water level inside the wetland is controlled by adjusting the bend angle of the rotating water outlet pipe (20).

10. The method of use according to claim 9, characterized in that: In step S3, when the sewage flow rate is lower than 60% of the design flow rate, the baffle plate (6) is removed, and 1-2 anaerobic cells (3) are kept in operation; when the sewage flow rate is higher than 60% of the design flow rate, all baffle plates (6) are installed to ensure that all anaerobic cells (3) are put into operation.

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