Integrated purification device and purification method

Abstract

This invention discloses an integrated purification device and method, relating to the field of wastewater purification, to solve the problems of existing technologies requiring manual operation for aquaculture wastewater treatment, which wastes manpower and occupies a large area. The integrated purification device includes: a housing, a wastewater inlet pipe and a purified wastewater outlet pipe, a first controllable valve, and a wastewater purification device, an online water quality monitoring device, and a controller installed within the housing. The wastewater inlet pipe and the purified wastewater outlet pipe extend into the housing, and are sequentially connected. The first controllable valve is connected to the purified wastewater outlet pipe. The online water quality monitoring device is installed on the purified wastewater outlet pipe, and the controller is connected to both the online water quality monitoring device and the first controllable valve. The purification method is applied to this integrated purification device. The integrated purification device and method provided by this invention are used to treat aquaculture wastewater, achieving automated treatment of aquaculture wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater purification technology, and in particular to an integrated purification device and purification method. Background Technology

[0002] Currently, aquaculture is one of the fastest-growing industries in my country's agricultural structure. Aquaculture provides people with a large amount of high-quality protein, making it an important guarantee for national food security.

[0003] However, with the continuous development of aquaculture towards large-scale and industrialized operations, the density of livestock, the amount of feed fed, and the frequency of wastewater discharge have increased. This has led to an increase in the content of nutrients and organic matter in aquaculture wastewater in recent years, as well as higher levels of pollutants such as suspended solids, total nitrogen, and total phosphorus, and antibiotics such as enrofloxacin. Therefore, direct discharge of aquaculture wastewater without treatment will cause serious environmental problems. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated purification device and purification method, which can be flexibly moved to the required location, reducing the footprint and realizing automated treatment of aquaculture wastewater.

[0005] To achieve the above objectives, in a first aspect, the present invention provides the following technical solution:

[0006] An integrated purification device includes: a housing, a tailwater inlet pipe and a purified tailwater outlet pipe, a first controllable valve, a tailwater purification device, a water quality online monitoring device, and a controller installed in the housing. The tailwater inlet pipe and the purified tailwater outlet pipe extend into the housing. The tailwater inlet pipe, the tailwater purification device, and the purified tailwater outlet pipe are connected in sequence. The first controllable valve is connected to the purified tailwater outlet pipe. The water quality online monitoring device is installed on the purified tailwater outlet pipe. The controller is connected to the water quality online monitoring device and the first controllable valve respectively.

[0007] The controller is used to open the first controllable valve after the online water quality monitoring device detects that the purified effluent from the effluent purification device meets the standards, and to close the first controllable valve when the online water quality monitoring device detects that the purified effluent from the effluent purification device does not meet the standards.

[0008] Compared with existing technologies, the integrated purification equipment provided by this invention includes: a housing, a tailwater inlet pipe and a purified tailwater outlet pipe, a first controllable valve, and a tailwater purification device, an online water quality monitoring device, and a controller installed within the housing. The tailwater inlet pipe and the purified tailwater outlet pipe extend into the housing. Therefore, when using the integrated purification equipment of this invention, the equipment can be flexibly moved to the desired location to purify the tailwater. Furthermore, since the tailwater inlet pipe, the tailwater purification device, and the purified tailwater outlet pipe are sequentially connected, the tailwater inlet pipe can be used to transport the tailwater to the tailwater purification device for purification, and then the purified tailwater can be discharged through the purified tailwater outlet pipe, thus achieving tailwater purification within the housing.

[0009] Based on this, in this embodiment of the invention, the first controllable valve is connected to the purified effluent outlet pipe, and the online water quality monitoring device is installed on the purified effluent outlet pipe. The controller is connected to both the online water quality monitoring device and the first controllable valve. Therefore, the controller can open the first controllable valve when the online water quality monitoring device detects that the purified effluent from the effluent purification device meets the standards, and close the first controllable valve when the online water quality monitoring device detects that the purified effluent from the effluent purification device does not meet the standards. Thus, fully automatic control of the integrated purification equipment is achieved, eliminating the need for manual operation, greatly reducing manpower waste, and improving purification efficiency.

[0010] As can be seen from the above, the integrated purification equipment of the present invention can be flexibly moved to the required location, reducing the footprint and realizing automated treatment of aquaculture wastewater.

[0011] Secondly, embodiments of the present invention also provide a purification method, comprising:

[0012] The controller opens the first controllable valve after the purified effluent from the effluent purification device meets the standards, and closes the first controllable valve when the purified effluent from the effluent purification device does not meet the standards.

[0013] When the sludge content in the wastewater purification device exceeds the standard, the controller controls the second controllable valve to open; when the sludge content in the wastewater purification device does not exceed the standard, the controller controls the second controllable valve to close.

[0014] When the pressure in the wastewater purification device exceeds the standard, the controller controls the second controllable valve to open; when the pressure in the wastewater purification device does not exceed the standard, the controller controls the second controllable valve to close.

[0015] Compared with the prior art, the beneficial effects of the purification method provided in the embodiments of the present invention are the same as those of the integrated purification device in the first aspect, and will not be repeated here. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute a limitation thereof.

[0017] Figure 1 A top view of the integrated purification device provided in an embodiment of the present invention is shown;

[0018] Figure 2 A cross-sectional view of the integrated purification device provided in an embodiment of the present invention is shown.

[0019] Figure label:

[0020] 100 - Casing, 200 - Tailwater Inlet Pipe, 300 - Purified Tailwater Outlet Pipe, 400 - First Controllable Valve, 500 - Tailwater Purification Device, 510 - Particulate Matter Purification Module, 511 - Filter Components, 5111 - Graphitized Carbon Ball Supported Nano-Zero-Valence Iron Packing Layer, 5112 - Composite Coal Gangue Filter Media Layer, 5113 - First Crushed Stone Layer, 512 - First Aeration Component, 520 - Nitrogen and Phosphorus Removal Module, 521 - Biological packing assembly, 5211- Second crushed stone layer, 5212- Denitrification and phosphorus removal packing layer, 522- Second aeration assembly, 600- Online water quality monitoring device, 700- Controller, 800- Backwash pipe, 900- Ultraviolet sterilizer, 1000- Sludge discharge pipe, 1001- Second controllable valve, 1100- Vent pipe, 1101- Third controllable valve, 1200- Aeration blower, 1300- Control box. Detailed Implementation

[0021] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Currently, aquaculture is one of the fastest-growing industries in my country's agricultural structure. Aquaculture provides a large amount of high-quality protein, playing a vital role in national food security. However, with the continuous development of aquaculture towards large-scale and industrialized operations, increased stocking density, feed input, and drainage frequency have led to increased nutrient and organic matter content in aquaculture wastewater, resulting in a daily increase in wastewater discharge. In recent years, the "168" aquaculture model, with its advantages of fewer fish diseases, smaller land area, lower investment, and higher yields, has been widely promoted as an ecological and efficient aquaculture model. However, the "168" model primarily uses largemouth bass, a highly polluting species, resulting in high concentrations of suspended solids, total nitrogen, total phosphorus, and enrofloxacin in the wastewater. Therefore, direct discharge of untreated aquaculture wastewater will cause serious environmental problems.

[0027] In order to further promote the application of the "168" aquaculture model, and based on the treatment needs and development requirements of the "168" aquaculture model, an integrated device with good filtration effect, high nitrogen and phosphorus removal rate, small footprint, and good removal effect on antibiotics such as enrofloxacin is particularly important for the purification of "168" aquaculture wastewater.

[0028] To address the aforementioned problems, embodiments of the present invention provide an integrated purification device and method. This integrated purification device can be flexibly moved to the desired location, reducing floor space requirements and achieving automated treatment of aquaculture wastewater. This solves the problems of existing technologies requiring manual operation for aquaculture wastewater treatment, which wastes manpower and requires a large area. It should be understood that this integrated purification device can purify not only aquaculture wastewater but also wastewater from other aquaculture methods. When purifying aquaculture wastewater, it can purify not only wastewater generated by the "168" aquaculture model but also wastewater generated by other aquaculture models; no limitation is made here.

[0029] Figure 1 A top view of the integrated purification device provided in an embodiment of the present invention is shown. Figure 2 A cross-sectional view of the integrated purification device provided in an embodiment of the present invention is shown. Figure 1 and Figure 2 As shown, an integrated purification device according to an embodiment of the present invention includes: a housing 100, a tailwater inlet pipe 200 and a purified tailwater outlet pipe 300, a first controllable valve 400, and a tailwater purification device 500, a water quality online monitoring device 600 and a controller 700 disposed in the housing 100. The tailwater inlet pipe 200 and the purified tailwater outlet pipe 300 extend into the housing 100. The tailwater inlet pipe 200, the tailwater purification device 500 and the purified tailwater outlet pipe 300 are connected in sequence. The first controllable valve 400 is connected to the purified tailwater outlet pipe 300. The water quality online monitoring device 600 is disposed on the purified tailwater outlet pipe 300. The controller 700 is connected to the water quality online monitoring device 600 and the first controllable valve 400 respectively. The controller 700 is used to open the first controllable valve 400 after the online water quality monitoring device 600 detects that the purified effluent from the effluent purification device 500 meets the standards, and to close the first controllable valve 400 when the online water quality monitoring device 600 detects that the purified effluent from the effluent purification device 500 does not meet the standards. It should be understood that the effluent inlet pipe 200 is connected to the drainage pipe of the aquaculture pond.

[0030] In practice, the aquaculture wastewater from the pond drainage pipe can be transported to the wastewater purification device 500 in the tank 100 via the wastewater inlet pipe 200. The wastewater purification device 500 treats suspended solids and nitrogen and phosphorus impurities in the wastewater to obtain purified wastewater. At the same time, the online water quality monitoring device 600 monitors whether the purified wastewater from the wastewater purification device 500 meets the standards. If the online water quality monitoring device 600 detects that the purified wastewater from the wastewater purification device 500 meets the standards, it controls the first controllable valve 400 to open. If the online water quality monitoring device 600 detects that the purified wastewater from the wastewater purification device 500 does not meet the standards, it controls the first controllable valve 400 to close.

[0031] For example, the online water quality monitoring device 600 can send pollutant content data to the controller 700. If the controller 700 receives data showing that the content of each pollutant in the purified effluent from the effluent purification device 500 is lower than the minimum allowable pollutant content standard, it can control the first controllable valve 400 to open, allowing the purified effluent to be discharged through the purified effluent outlet pipe 300. If the controller 700 receives data showing that the content of each pollutant in the purified effluent from the effluent purification device 500 is higher than the minimum allowable pollutant content standard, it can control the first controllable valve 400 to close, preventing substandard effluent from being discharged through the purified effluent outlet pipe 300. Therefore, fully automatic control of the integrated purification equipment is achieved, eliminating the need for manual operation, greatly reducing manpower waste, and improving purification efficiency.

[0032] Therefore, the integrated purification equipment provided by this invention can be flexibly moved to the required location to purify the effluent. Simultaneously, since the effluent inlet pipe, the effluent purification device, and the purified effluent outlet pipe are connected sequentially, the effluent can be transported to the effluent purification device via the effluent inlet pipe for purification, and then the purified effluent can be discharged through the purified effluent outlet pipe, thus achieving effluent purification within the tank.

[0033] In one of the alternative methods, such as Figure 2 As shown, the tailwater purification device 500 of this embodiment of the invention includes a particulate matter purification module 510 and a nitrogen and phosphorus removal module 520. The tailwater inlet pipe 200, the particulate matter purification module 510, the nitrogen and phosphorus removal module 520 and the purified tailwater outlet pipe 300 are connected in sequence.

[0034] In practice, the aquaculture wastewater in the aquaculture pond drainage pipe can be transported to the particulate matter purification module 510 in the box 100 through the wastewater inlet pipe 200. The particulate matter purification module 510 filters the suspended particulate matter in the wastewater. The wastewater from the particulate matter purification module 510 enters the denitrification and phosphorus removal module 520. The denitrification and phosphorus removal module 520 removes nitrogen and phosphorus-containing substances from the wastewater, thereby obtaining purified wastewater. In the end, multi-stage treatment of aquaculture wastewater is achieved, making the treated wastewater more environmentally friendly.

[0035] In one alternative embodiment, the particulate matter purification module 510 includes a filter assembly 511 and a first aeration assembly 512. The first aeration assembly 512 is located below the filter assembly 511. The tailwater inlet pipe 200 is connected to the inlet of the filter assembly 511, and the outlet of the filter assembly 511 is connected to the inlet of the nitrogen and phosphorus removal module 520. It should be understood that the inlet of the particulate matter purification module 510 is located above the side wall of the particulate matter purification module 510, and the outlet of the particulate matter purification module 510 is located below the side wall of the particulate matter purification module 510.

[0036] In practice, the first aeration component 512 can be used to increase the dissolved oxygen in the aquaculture wastewater. Then, the wastewater from the wastewater inlet pipe 200 is filtered using the filter component 511 to remove suspended particulate matter. At this time, the first aeration component 512 oxygenates the wastewater, allowing the wastewater entering from the wastewater inlet pipe 200 to first enter the filter component 511 to filter suspended particulate matter, thus accelerating the filtration speed.

[0037] For example, the filter assembly 511 of this embodiment of the invention includes, from top to bottom, a graphitized carbon ball-supported nano-zero-valent iron filler layer 5111, a composite coal gangue filter media layer 5112, and a first crushed stone layer 5113. It should be understood that the composite coal gangue filter media layer 5112 includes at least one of coal gangue, diatomaceous earth, and soybean residue. The graphitized carbon ball-supported nano-zero-valent iron filler layer 5111 is a composite material including iron and carbon elements, wherein the mass ratio of iron to carbon is 1:5. The filling volume ratio of the composite coal gangue filter media layer 5112 and the graphitized carbon ball-supported nano-zero-valent iron filler layer 5111 is 4:3. The particle size of the crushed stone in the first crushed stone layer 5113 is 50mm to 80mm, the particle size of the graphitized carbon ball-supported nano-zero-valent iron filler layer is 5mm, and the particle size of the composite coal gangue filter media is 20mm to 30mm. The first aeration component can be filled between the gravel in the second gravel layer 5211.

[0038] In practical implementation, since the inlet of the particulate matter purification module 510 is located above the side wall of the module, the aquaculture wastewater from the wastewater inlet pipe 200 can pass sequentially through three types of filter media: a graphitized carbon ball-supported nano-zero-valent iron packing layer 5111, a composite coal gangue filter media layer 5112, and a first crushed stone layer 5113. This absorbs and filters impurities in the aquaculture wastewater, removes suspended particles, increases water transparency, and purifies the water quality. It also has a good removal effect on antibiotics such as enrofloxacin. Simultaneously, under aeration and oxygen supply conditions, organic matter in the aquaculture wastewater can be oxidized and decomposed by microorganisms, which is beneficial for subsequent nitrification and denitrification reactions.

[0039] For example, the preparation method of the above-mentioned graphitized carbon sphere-supported nano-zero-valent iron filler includes the following steps:

[0040] Step 1: Ferrous acetate and 2-amino-1,4-dicarboxylic acid are placed in a ball mill reactor at a mass ratio of 3:1;

[0041] Step 2: Add zirconic anhydride to the ball mill reactor and grind to obtain the ball mill material;

[0042] Step 3: Pyrolyze and cool the ball-milled material to obtain graphitized carbon-supported nano-zero-valent iron material.

[0043] The above-mentioned composite coal gangue filter material is made by placing 15-18mm coal gangue into diatomaceous earth slurry, coating it evenly with slurry, then coating it with soybean residue gravel, and finally drying and sintering it.

[0044] In one alternative embodiment, the nitrogen and phosphorus removal module 520 of the present invention includes a biological packing assembly 521 and a second aeration assembly 522. The second aeration assembly 522 is located below the biological packing assembly 521, and the outlet of the biological packing assembly 521 is connected to the purified effluent outlet pipe 300 through a first controllable valve 400.

[0045] In practice, the effluent from the particulate matter purification module 510 enters the gravel layer below the nitrogen and phosphorus removal module 520, where it undergoes nitrogen and phosphorus removal through the biological packing assembly 521, resulting in purified effluent. It should be understood that during the nitrogen and phosphorus removal process, the second aeration assembly 522 is in a closed state. This closed state allows the effluent in the nitrogen and phosphorus removal module 520 to be in an anaerobic state, thereby further improving the nitrogen and phosphorus removal efficiency.

[0046] In one possible implementation, the biological packing assembly 521 of this embodiment includes a second gravel layer 5211 and a nitrogen and phosphorus removal packing layer 5212 distributed sequentially from bottom to top. It should be understood that the second gravel layer 5211 may be consistent with the first gravel layer in the particulate matter purification module 510. A second aeration assembly 522 may fill the spaces between the gravel in the second gravel layer 5211.

[0047] In practical implementation, the surface of the aforementioned denitrification and phosphorus removal packing layer 5212 provides a rich microbial growth environment, which helps to adsorb and biodegrade organic pollutants in the water. The denitrification and phosphorus removal packing layer 5212 utilizes autotrophic denitrification packing to convert nitrate nitrogen in the water into nitrogen gas, releasing it into the atmosphere through denitrification, thereby reducing the nitrogen content in the water. It also utilizes phosphorus removal packing to adsorb phosphorus in the water, fixing it on the packing surface or within microorganisms through chemical reactions or biological processes, thus reducing the phosphorus content in the water. By utilizing the synergistic effect of the autotrophic denitrification and phosphorus removal packing, it can efficiently remove nutrients such as nitrogen and phosphorus while performing deep treatment, ensuring that the effluent meets the first-class standard of the receiving water area's aquaculture wastewater discharge limit in Henan Province's "Aquaculture Wastewater Pollutant Discharge Standard". Finally, the aquaculture wastewater from the particulate matter purification module 510 passes through the second gravel layer 5211 and the denitrification and phosphorus removal packing layer 5212, and then enters the purified wastewater outlet pipe 300 from the top, completing the wastewater purification process.

[0048] In one example, the integrated purification device of this embodiment of the invention further includes a backwash pipe 800 and an ultraviolet sterilizer 900. The backwash pipe 800 is connected to the particulate matter purification module 510 and the nitrogen and phosphorus removal module 520, respectively, and the ultraviolet sterilizer 900 is positioned above the nitrogen and phosphorus removal module 520. The backwash pipe 800 can remove excess microbial film and suspended solids from the packing layer, restoring the packing's processing capacity. The ultraviolet sterilizer 900, positioned above the nitrogen and phosphorus removal module 520, can achieve a sterilization effect on the aquaculture wastewater through the action of UVC ultraviolet light.

[0049] For example, the integrated purification device of this embodiment of the invention also includes a sludge discharge pipe 1000 extending into the housing 100 and a second controllable valve 1001 provided on the sludge discharge pipe 1000. The sludge discharge pipe 1000 is connected to the denitrification and phosphorus removal module 520, and the second controllable valve 1001 is signal connected to the controller 700.

[0050] In practical implementation, the controller 700 can open the second controllable valve 1001 when the sludge content in the effluent purification device 500 exceeds the standard, and close the second controllable valve 1001 when the sludge content in the effluent purification device 500 does not exceed the standard. Therefore, the main function of the sludge discharge pipe 1000 is to discharge sludge, sediment, and other wastes from the system during the sewage treatment process to ensure the normal operation of the equipment.

[0051] For example, the integrated purification device of this invention also includes a vent pipe 1100 extending into the housing and a third controllable valve 1101 provided on the vent pipe 1100. The vent pipe 1100 is connected to the particulate matter purification module 510, and the third controllable valve 1101 is signal connected to the controller 700.

[0052] In practical implementation, the controller 700 can open the second controllable valve 1001 when the pressure in the tailwater purification device 500 exceeds the standard, and close the second controllable valve 1001 when the pressure in the tailwater purification device 500 does not exceed the standard. The vent pipe 1100 mainly functions to reduce the pressure in the pipeline and container to prevent explosion accidents caused by excessive pressure.

[0053] In one possible implementation, the integrated purification device of this embodiment of the invention further includes an equipment control room located within the housing 100, wherein an aeration fan 1200 and a control box 1300 are distributed within the equipment control room. The aeration fan 1200 is connected to the first aeration assembly 512 and the second aeration assembly 522 respectively, and is used to provide power to the first aeration assembly 512 and the second aeration assembly 522. The aeration fan 1200, the first controllable valve 400, the second controllable valve 1001, the third controllable valve 1101, the online water quality monitoring device 600, and the ultraviolet sterilizer 900 are all electrically connected to the control box 1300, and the control box 1300 is electrically connected to an external power supply via a connection circuit.

[0054] For example, the aeration blower 1200 can also be connected to an external solar panel to convert solar radiation into electrical energy and store it. Under the action of an AC inverter, the direct current is converted into alternating current to power the aeration blower 1200.

[0055] In one possible implementation, embodiments of the present invention also provide a purification method applied to the integrated purification device of the present invention, comprising:

[0056] The controller opens the first controllable valve after the purified effluent from the effluent purification device meets the standards, and closes the first controllable valve when the purified effluent from the effluent purification device does not meet the standards.

[0057] When the sludge content in the wastewater purification device exceeds the standard, the controller controls the second controllable valve to open; when the sludge content in the wastewater purification device does not exceed the standard, the controller controls the second controllable valve to close.

[0058] When the pressure in the wastewater purification device exceeds the standard, the controller controls the second controllable valve to open; when the pressure in the wastewater purification device does not exceed the standard, the controller controls the second controllable valve to close.

[0059] As can be seen from the above, the integrated equipment for purifying "168" model aquaculture wastewater of the present invention comprises three units: the equipment control room, the aeration oxidation zone, and the nitrogen and phosphorus removal zone, which work synergistically to achieve the purpose of purifying "168" model aquaculture wastewater. After entering the aeration oxidation zone, the aquaculture wastewater undergoes preliminary purification under the action of physical filter media such as graphitized carbon ball-loaded nano-zero-valent iron material, composite coal gangue filter media, and crushed stone. Subsequently, it undergoes further treatment under the action of highly efficient nitrogen and phosphorus removal packing in the nitrogen and phosphorus removal zone. Finally, it is sterilized under the action of an ultraviolet sterilizer, thereby enabling the aquaculture wastewater to meet the first-class standard of the discharge limit for aquaculture wastewater in the receiving water area of ​​Henan Province's "Aquaculture Wastewater Pollutant Discharge Standard". Moreover, this integrated equipment simplifies the treatment process of "168" model aquaculture wastewater, has a compact structure, and significantly reduces the footprint, which is conducive to reducing infrastructure costs.

[0060] Based on this, the integrated purification equipment of the present invention integrates physical filtration and biological nitrogen and phosphorus removal processes into one set of equipment. Within the integrated equipment, wastewater is filtered by packing material, biologically removed nitrogen and phosphorus, removed antibiotics, and separated into mud and water. This simplifies the treatment process of aquaculture wastewater, has a compact structure, and occupies a significantly smaller area, which helps to reduce infrastructure costs.

[0061] In summary, the multi-stage ecological purification system of this invention allows the controller to open the first controllable valve when the online water quality monitoring device detects that the purified effluent from the effluent purification device meets the standards, and to close the first controllable valve when the online water quality monitoring device detects that the purified effluent from the effluent purification device does not meet the standards. Therefore, fully automatic control of the integrated purification equipment is achieved, eliminating the need for manual operation, greatly reducing manpower waste, and improving purification efficiency.

[0062] The above description is merely a specific embodiment of the present invention. Obviously, various modifications and combinations can be made without departing from the spirit and scope of the present invention. Accordingly, this specification and accompanying drawings are merely exemplary descriptions of the invention as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if these modifications and variations of the present invention fall within the scope of the claims and their equivalents, the intent of the present invention includes these modifications and variations. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. An integrated purification device, characterized in that, include: The system comprises a tank, a tailwater inlet pipe and a purified tailwater outlet pipe, a first controllable valve, a tailwater purification device, a water quality online monitoring device, and a controller installed inside the tank. The tailwater inlet pipe and the purified tailwater outlet pipe extend into the tank. The tailwater inlet pipe, the tailwater purification device, and the purified tailwater outlet pipe are connected in sequence. The first controllable valve is connected to the purified tailwater outlet pipe. The water quality online monitoring device is installed on the purified tailwater outlet pipe. The controller is connected to the water quality online monitoring device and the first controllable valve respectively. The controller is used to open the first controllable valve after the online water quality monitoring device detects that the purified effluent from the effluent purification device meets the standards, and to close the first controllable valve when the online water quality monitoring device detects that the purified effluent from the effluent purification device does not meet the standards. The wastewater purification device includes a particulate matter purification module and a nitrogen and phosphorus removal module. The particulate matter purification module includes a filter assembly and a first aeration assembly. The first aeration assembly is located below the filter assembly. The wastewater inlet pipe is connected to the inlet of the filter assembly, and the outlet of the filter assembly is connected to the inlet of the nitrogen and phosphorus removal module. The filter assembly includes, from top to bottom, a graphitized carbon ball-supported nano-zero-valent iron filler layer, a composite coal gangue filter media layer, and a first crushed stone layer. The composite coal gangue filter media layer includes coal gangue, diatomaceous earth, and soybean residue. The graphitized carbon ball-supported nano-zero-valent iron filler layer is a composite material containing iron and carbon elements, wherein the mass ratio of iron to carbon elements is 1:5, and the volume ratio of the composite coal gangue filter media layer to the graphitized carbon ball-supported nano-zero-valent iron filler layer is 4:

3. The tailwater inlet pipe, the particulate matter purification module, the nitrogen and phosphorus removal module, and the purified tailwater outlet pipe are connected in sequence. The nitrogen and phosphorus removal module includes a biological packing component and a second aeration component. The second aeration component is located below the biological packing component. The outlet of the biological packing component is connected to the purified tailwater outlet pipe through the first controllable valve. The biological packing component includes a second crushed stone layer and a nitrogen and phosphorus removal packing layer distributed from bottom to top.

2. The integrated purification equipment according to claim 1, characterized in that, The integrated purification equipment also includes a backwash pipe and an ultraviolet sterilizer. The backwash pipe is connected to the particulate matter purification module and the nitrogen and phosphorus removal module respectively, and the ultraviolet sterilizer is located above the nitrogen and phosphorus removal module.

3. The integrated purification equipment according to any one of claims 1 to 2, characterized in that, The integrated purification equipment also includes a sludge discharge pipe extending into the housing and a second controllable valve installed on the sludge discharge pipe. The sludge discharge pipe is connected to the nitrogen and phosphorus removal module, and the second controllable valve is signal-connected to the controller. The controller is used to open the second controllable valve when the sludge content in the tailwater purification device exceeds the standard, and to close the second controllable valve when the sludge content in the tailwater purification device does not exceed the standard.

4. The integrated purification equipment according to claim 3, characterized in that, The integrated purification equipment also includes a vent pipe extending into the housing and a third controllable valve installed on the vent pipe. The vent pipe is connected to the particulate matter purification module, and the third controllable valve is signal-connected to the controller.

5. A purification method, applied to the integrated purification equipment according to any one of claims 1 to 4, characterized in that, The method includes: The controller opens the first controllable valve after the purified effluent from the effluent purification device meets the standards, and closes the first controllable valve when the purified effluent from the effluent purification device does not meet the standards.

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