A biological enhanced sewage treatment device based on an iron-based magnetic biochar carrier

Abstract

The application discloses a kind of biological reinforcement sewage treatment device based on iron-based magnetic biochar carrier, to solve the difficulty of reuse of flocculating agent in the existing sewage treatment process.The application includes adjusting pool, anaerobic tank, aerobic tank, secondary sedimentation tank, dosing device and cyclone, the cyclone separates sludge and iron-based magnetic carbon carrier, cyclone is provided with magnetic field to improve the separation efficiency of iron-based magnetic carbon carrier;Wherein, adjusting pool, anaerobic tank, aerobic tank and secondary sedimentation tank are sequentially communicated, and the iron-based magnetic carbon carrier obtained by cyclone separation is delivered to the aerobic tank, and the iron-based magnetic carbon carrier simultaneously acts as flocculating agent and strain carrier.Adopting iron-based magnetic carbon carrier as flocculating agent and strain carrier simultaneously reduces the input of materials, and the recovery of iron-based magnetic carbon carrier is realized by cyclone combined with magnetism.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more specifically, to a bio-enhanced wastewater treatment device based on an iron-based magnetic biocarbon carrier. Background Technology

[0002] Wastewater treatment relies heavily on biological processes. By conditioning the wastewater and improving its biodegradability, various microbial populations are provided with oxygen-rich, facultative, and anaerobic environments to fix free nitrogen, phosphorus, and other elements into sludge through biological activities at different oxygen levels. Then, flocculants are used to accelerate the sedimentation of the solidified sludge, thereby separating the sludge from the water body. This process is typical of wastewater treatment.

[0003] To reduce water residence time and accelerate flocculation, relevant technologies incorporate magnetic flocculants. These flocculants adsorb and flocculate suspended matter, forming larger flocs. As coagulation time increases, these flocs gradually enlarge and settle to the bottom of the wastewater, thus removing suspended matter. The faster sedimentation of magnetic flocculants compared to conventional flocculants is due to their higher specific gravity and the ability to be separated more quickly from the clarified liquid using magnetic separation devices.

[0004] It also features a Moving-Bed Biofilm Reactor (MBBR). The MBBR process involves placing carrier units with a large specific surface area into the tank. These carrier units move freely with the water flow within the reactor, and aeration or mechanical stirring is employed. Colonies attach and grow on the carrier units. In mature carrier units, the surface colonies, from the inside out, consist of anaerobic bacteria, facultative anaerobic bacteria, and aerobic bacteria. As the colonies consume oxygen, the oxygen content reaching the inner layer decreases during molecular motion, thus achieving highly efficient wastewater treatment capacity within a single tank.

[0005] In existing wastewater treatment processes, flocculants and carrier units are separate, and flocculants are difficult to reuse. Summary of the Invention

[0006] This invention overcomes the shortcomings of existing wastewater treatment processes where flocculants are difficult to reuse, and provides a wastewater treatment device based on composite powder magnetic biological carbon support, which can accelerate wastewater treatment efficiency and realize the reuse of flocculants.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A bio-enhanced wastewater treatment device based on an iron-based magnetic biocarbon carrier, comprising:

[0009] An equalization tank is provided for filtering and adjusting the pH of wastewater.

[0010] An anaerobic tank provides an anaerobic environment and contains anaerobic bacterial sludge flocs.

[0011] An aerobic tank is provided with an aeration device at the bottom of the aerobic tank. The aeration device provides air and generates an upflow through the air to form a moving bed biofilm reactor.

[0012] Secondary sedimentation tank is used for mud-water separation;

[0013] The dosing device adds acid and alkali solutions to the equalization tank and carbon sources and iron-based magnetic carbon carriers to the anaerobic tank.

[0014] A hydrocyclone, which separates sludge and iron-based magnetic carbon carrier, is provided with a magnetic adjustment structure on the outside of the hydrocyclone. The magnetic adjustment structure generates a magnetic field to improve the separation efficiency of the iron-based magnetic carbon carrier.

[0015] Preferably, the hydrocyclone includes a hydrocyclone cylinder, a feed pipe, and an overflow pipe. The hydrocyclone cylinder comprises an upper cylindrical section and a lower conical section. The bottom of the conical section has an underflow port, and the inner wall of the conical section near the underflow port is fitted with several protruding strips arranged along the height direction. The hydrocyclone rubs against the iron-based magnetic carbon carrier through the bottom protruding strips, thereby peeling off part of the aerobic bacterial film fixed on the iron-based magnetic carbon carrier, controlling the size of the iron-based magnetic carbon carrier, maintaining its flocculation function, and preserving the ratio of anaerobic, facultative, and aerobic bacteria.

[0016] Preferably, a portion of the sludge obtained from the hydrocyclone separation is pumped into the anaerobic tank. This structure replenishes the anaerobic tank with anaerobic bacteria, thereby improving wastewater treatment efficiency through the sludge process.

[0017] Preferably, the magnetic adjustment structure includes an excitation device disposed around the periphery of the cone. Compared to permanent magnets, the excitation device generates a stronger magnetic field and allows for switching and intensity adjustment.

[0018] Preferably, the number of excitation devices is several, and the excitation devices are arranged at equal intervals around the cone. A uniform magnetic field is generated by these devices.

[0019] Preferably, the cross-section of the convex strip has an insert portion and a protrusion portion for installation in the cone, the edge of the protrusion portion being an asymmetrical arc, with the curvature of the upstream portion being less than that of the downstream portion. The shape of the convex strip can reduce the total resistance to the swirling flow and reduce energy consumption.

[0020] Preferably, the excitation device is connected to the protruding strip, and the excitation device can magnetize the protruding strip. The device makes the protruding strip magnetic, and the protruding strip attracts the iron-based magnetic carbon carrier. Then, the attached iron-based magnetic carbon carrier rubs and collides with the iron-based magnetic carbon carrier moving in a spiral with the mixed flow, thus peeling off part of its bacterial layer.

[0021] Preferably, a propeller blade is provided outside the overflow pipe, and the propeller blade is fixedly connected to the wall of the overflow pipe. The rotation direction of the propeller blade is consistent with the rotation direction of the material in the separation device, and the helix angle of the propeller blade points to the top of the cyclone cylinder. This structure is used to reduce energy dissipation. Specifically, there is a short-circuit flow near the top of the cyclone cylinder that does not participate in the outer or inner cyclone flow. The short-circuit flow runs along the side wall, top cover, and overflow pipe of the cylindrical cylinder, and finally merges with the inner cyclone flow and is discharged from the overflow port of the overflow pipe. This application improves upon this by providing a propeller blade fixedly connected to the outer wall of the overflow pipe. When the mixed flow enters the cyclone cylinder, the cyclone direction is the same everywhere in the mixed flow, and the liquid in the propeller blade also rotates synchronously in a spiral flow. Under the influence of the shape of the propeller blade, the upward movement of the liquid in the propeller blade is opposite to the flow direction of the liquid in the short-circuit flow, thereby interrupting the short-circuit flow, reducing energy dissipation, and reducing the amount of unseparated material.

[0022] The equalization tank, anaerobic tank, and secondary sedimentation tank are connected in sequence. The iron-based magnetic carbon carrier obtained by hydrocyclone separation is delivered to the aerobic tank. The iron-based magnetic carbon carrier serves as both a flocculant and a microbial carrier.

[0023] The iron-based magnetic carbon carrier is a composite of iron and activated carbon. Iron is magnetic, and carbon is porous and positively charged, resulting in a good specific surface area and strong affinity for flocs, making it suitable as a nucleating agent for granular sludge.

[0024] The equalization tank physically filters the wastewater, removing larger impurities, and adjusts the pH value by adding acids and alkalis, thereby improving the biological activity of subsequent biological treatment.

[0025] The anaerobic tank removes nitrogen by ammonifying the difficult-to-treat organic matter, which is then converted into nitrate in the aerobic tank and finally denitrified to produce nitrogen.

[0026] The iron-based magnetic carbon carriers added to the anaerobic tank act as sclerotia to attract bacterial flocs, forming a film on their surface. They then flow into the aerobic tank with the water. The surface of the iron-based magnetic carbon carriers already has an inner layer of anaerobic bacteria, while the outer surface is anchored with aerobic bacteria. At this point, the surface of the iron-based magnetic carbon carriers simultaneously contains aerobic, facultative anaerobic, and anaerobic bacteria, making full use of the space. In the floating bed environment, various bacterial species can efficiently carry out biochemical processes, improving wastewater treatment efficiency. Furthermore, it eliminates the need for return pipes and allows nitrification products to be used as raw materials for denitrification nearby.

[0027] In addition to acting as a carrier, the sludge aggregates, through their own magnetism, cluster together to form larger flocs, which then move throughout the aerobic tank via a floating bed environment, preventing them from accumulating at the bottom. In this state, most of the sludge in the aerobic tank is replenished by the iron-based magnetic carbon carrier, and the boundary between the clear water and the sludge is relatively clear.

[0028] Upon entering the secondary sedimentation tank, the aeration environment is lost, and the heavier flocs settle rapidly, separating from the clear water. This structure reduces flocculation time, decreases water retention time, and improves wastewater treatment efficiency.

[0029] The sediment then enters a hydrocyclone for separation, separating the sludge from the iron-based magnetic carbon carrier. The iron-based magnetic carbon carrier is then reintroduced into the aerobic tank. Since its surface already has an anaerobic bacterial layer, it does not need to be reintroduced into the anaerobic tank. Part of the sludge is added to the anaerobic tank to replenish the anaerobic bacteria, while the other part is discharged for dewatering.

[0030] Through the above structure, the wastewater treatment device can reuse the iron-based magnetic carbon carrier, enabling it to function as both a microbial carrier and a flocculant, thus achieving the reuse of the flocculant. The reuse of the flocculant relies on its magnetism; the magnetic field enhances the separation from the sludge, allowing for differentiation via a hydrocyclone.

[0031] Preferably, the system also includes a magnetizing device to remagnetize the separated iron-based magnetic carbon carrier. This structure enhances the magnetism of the iron-based magnetic carbon carrier, increasing its magnetic properties in the aerobic tank, enabling it to attract and clump together to form larger flocs, and allowing it to fully interact with the magnetic field in the subsequent hydrocyclone, thus improving the degree of separation from the sludge.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] (1) Iron-based magnetic carbon carrier is used as both flocculant and microbial carrier, which reduces the input of materials and realizes the recovery of iron-based magnetic carbon carrier by combining a hydrocyclone with magnetism.

[0034] (2) Through aeration in the aerobic tank, the iron-based magnetic carbon carrier has the function of MBBR, and flocculation is carried out in the process of sludge production, which reduces the water retention time in the secondary sedimentation tank, improves the water treatment capacity, and reduces the volume requirement of the secondary sedimentation tank.

[0035] (3) This gives the hydrocyclone the ability to strip off iron-based magnetic carbon carriers, which can maintain the balance of anaerobic, facultative anaerobic and aerobic bacteria and improve the stability of wastewater treatment. Attached Figure Description

[0036] Figure 1This is a schematic diagram of the hydrocyclone of the present invention;

[0037] Figure 2 This is a schematic diagram of the overflow pipe of the present invention;

[0038] Figure 3 This is a schematic diagram of the raised strip of the present invention;

[0039] Figure 4 This is a schematic diagram of the arrangement of the protrusions and excitation device of the present invention;

[0040] Figure 5 This is a schematic diagram of the device of the present invention;

[0041] In the picture:

[0042] 1. Swirl cylinder 2. Cylindrical cylinder 3. Conical cylinder 4. Feed pipe 5. Overflow pipe 6. Propeller blade 7. Adjusting wing 8. Excitation device 9. Underflow port 10. Raised bar 11. Protrusion 12. Embedded part 13. Outer swirling flow 14. Inner swirling flow 15. Short-circuit flow Detailed Implementation

[0043] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0044] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] In this disclosure, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements in this disclosure, and do not specifically refer to any component or element in this disclosure, nor should they be construed as limiting this disclosure.

[0047] In the present disclosure, terms such as "fixed connection", "connected", "joined" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For those skilled in relevant scientific research or technology in this field, the specific meanings of the above terms in the present disclosure can be determined according to specific circumstances, and it should not be construed as a limitation to the present disclosure.

[0048] Embodiment:

[0049] A biological enhanced sewage treatment device based on an iron-based magnetic biochar carrier, wherein the iron-based magnetic carbon carrier is a composite of activated carbon and iron, which has both magnetism and a high specific surface area of activated carbon, and is positively charged, so that it can be used as a flocculant to attract zoogloeal aggregates and can also be separated from sludge aggregates by using its magnetism, thereby achieving reuse.

[0050] Refer Figure 1 As shown, the sewage treatment device includes:

[0051] A regulating tank that filters and adjusts the pH of the sewage;

[0052] An anaerobic tank that provides an anaerobic environment and contains anaerobic sludge aggregates;

[0053] An aerobic tank with an aeration device at the bottom that provides air and generates an upflow through the air to form a moving bed biofilm reactor. The aerobic tank and the anaerobic tank form an AO structure and can perform nitrogen and phosphorus removal;

[0054] A secondary sedimentation tank, i.e., a secondary settling tank, for separating mud and water;

[0055] A dosing device that adds acid-base solution to the regulating tank and adds carbon source and iron-based magnetic carbon carrier to the anaerobic tank. The iron-based magnetic carbon carrier therein is brand new and not reused, and is replenished according to the reduction of the iron-based magnetic carbon carrier.

[0056] Refer Figure 2 As shown, a hydrocyclone that separates sludge and iron-based magnetic carbon carrier. There is a magnetic force adjusting structure outside the hydrocyclone, and the magnetic force adjusting structure generates a magnetic field to improve the separation efficiency of the iron-based magnetic carbon carrier; the hydrocyclone includes a cyclone cylinder 1, a feed pipe 4, and an overflow pipe 5. The feed pipe 4 is tangentially connected to the cyclone cylinder 1 along the cylindrical cylinder 2, and the cross-section of the feed pipe 4 is rectangular.

[0057] The hydrocyclone includes a hydrocyclone cylinder 1, a feed pipe 4, and an overflow pipe 5. The hydrocyclone cylinder 1 includes an upper cylindrical barrel 2 and a lower conical barrel 3. A bottom flow port 9 is provided at the bottom of the conical barrel 3. A plurality of convex strips 10 are embedded in the inner wall of the conical barrel 3 near the bottom flow port 9, and the convex strips 10 are arranged in the height direction. The swirling flow frictions the iron-based magnetic carbon carriers through the convex strips 10 at the bottom, thereby stripping part of the fixedly attached aerobic layer biofilm of the iron-based magnetic carbon carriers, controlling the size of the iron-based magnetic carbon carriers, maintaining their flocculation function while maintaining the ratio of anaerobic, facultative, and aerobic bacteria. The height direction mentioned refers to that the convex strips 10 are parallel to the central axis of the hydrocyclone cylinder.

[0058] Part of the sludge obtained by the separation of the hydrocyclone is sent into the anaerobic tank through a sludge pump. Anaerobic bacteria are supplemented to the anaerobic tank through the above structure, and the sewage treatment efficiency is improved by using the sludge method.

[0059] The magnetic force adjustment structure includes an excitation device 8 arranged outside the conical barrel 3. The excitation device 8 generates a stronger magnetic field intensity compared with a permanent magnet, and can be switched and the intensity can be adjusted.

[0060] The number of the excitation devices 8 is several, and the excitation devices 8 are arranged equidistantly around the conical barrel 3. A uniform magnetic field is generated through the device.

[0061] See Figure 4 As shown, the cross-section of the convex strip 10 has an embedding part 12 for installing in the conical barrel 3 and a protruding part 11. The edge of the protruding part 11 is an asymmetric arc, and the curvature of the upstream part is smaller than that of the downstream part. The shape of the convex strip 10 can reduce the total resistance received by the swirling flow and reduce energy consumption.

[0062] Since the magnetic carriers simultaneously act as both bacterial strains and flocculants, in addition to aggregating with other magnetic carriers, the magnetic carriers include sludge particles that are easily separated when flocculating from the outside to the inside, and the fixedly attached sludge growing on the surface of the magnetic carriers. The surface of the magnetic carriers has a porous structure to increase its surface area. The colony structure growing on the magnetic carriers fills the surface of the magnetic carriers. Aerobic colonies grow on the outermost layer, facultative anaerobic colonies live in the middle layer, and anaerobic colonies grow in the inner layer. As the magnetic carriers are recycled, their bacterial layers will continue to thicken, resulting in a decrease in the proportion of the outermost surface area, leading to a decrease in the proportion of aerobic bacterial strains, the disappearance of facultative anaerobic colonies that cannot obtain oxygen and apoptose in the middle layer, and the growth of anaerobic bacterial strains. This will cause an imbalance in aerobic, facultative anaerobic, and anaerobic bacterial strains and also affect the utility of aeration during sewage treatment.

[0063] The excitation device 8 is connected to the rib 10, and the excitation device 8 can magnetize the rib 10. By means of this device, the rib 10 is made magnetic, and the iron-based magnetic carbon carrier is adsorbed by the rib 10. Then, the iron-based magnetic carbon carrier attached is rubbed and collided with the iron-based magnetic carbon carrier moving in a spiral motion along with the mixed flow to peel off part of its bacterial layer.

[0064] As Figure 5 shown, in some embodiments, each excitation device 8 is alternately divided into N excitation groups, and the excitation groups are alternately powered on. By means of this structure, the adsorption and accumulation of magnetic carriers are avoided.

[0065] As Figure 3 shown, a propeller blade 6 is provided outside the overflow pipe 5. The propeller blade 6 is fixedly connected to the pipe wall of the overflow pipe 5. The rotation direction of the propeller blade 6 is the same as the rotation direction of the material in the separation device, and the helix angle of the propeller blade 6 points to the top of the cyclone cylinder 1. This structure is used to reduce energy dissipation. Specifically, there is a short-circuit flow 15 that does not participate in the outer swirl 13 and the inner swirl 14 at a position near the top of the cyclone cylinder 1. The short-circuit flow 15 flows along the side wall, the top cover of the cylindrical cylinder 2 and the overflow pipe 5, and finally converges with the inner swirl 14 and is discharged from the overflow port of the overflow pipe 5. This application improves this situation by providing a propeller blade 6 fixedly connected to the outer side wall of the overflow pipe 5. When the mixed flow enters the cyclone cylinder 1, the swirl directions of the mixed flow at各处 are the same, and the liquid in the propeller blade 6 also rotates synchronously to form a spiral flow. Under the influence of the shape of the propeller blade 6, the liquid in the propeller blade 6 moves upward, which is opposite to the flow direction of the liquid in the short-circuit flow 15, so as to be able to interrupt the short-circuit flow 15, reduce energy dissipation while reducing the quantity of unseparated materials.

[0066] In some embodiments, a regulating wing 7 is provided at the edge of the propeller blade 6. The regulating wing 7 is made of a flexible material and翘向上 when not under external force. This structure is to further reduce energy consumption on the basis of the aforementioned propeller blade 6. The propeller blade 6 provided outside the aforementioned overflow pipe 5 makes the mixed flow move upward, opposite to the flow direction of the short-circuit flow 15, so as to cancel each other out in pairs and破坏 the formation of the cycle of the short-circuit flow 15. This requires the cooperation of the flow rate of the mixed flow, the shape of the cyclone cylinder 1, the feed viscosity of the mixed flow, the shape of the propeller blade 6, etc. to achieve just a symmetrical effect. If the pressure generated by the short-circuit flow 15 is greater than the lift force generated by the propeller blade 6, the short-circuit flow 15 will be weakened but still exist; otherwise, it will cause waste of the kinetic energy of the mixed flow. This requires the针对性 manufacture of the overflow pipe 5 with the propeller blade 6, and such a做法 will increase the cost. Therefore, this embodiment provides a flexible regulating wing 7 installed at the edge of the propeller blade 6.

[0067] In some embodiments, the regulating wing 7 is mounted on the end of the propeller blade 6 in a secondary molding manner. In this embodiment, the end of the propeller blade 6 is provided with a socket for connecting to the root of the regulating wing 7.

[0068] The equalization tank, anaerobic tank and secondary sedimentation tank are connected in sequence. The iron-based magnetic carbon carrier obtained by hydrocyclone separation is delivered to the aerobic tank. The iron-based magnetic carbon carrier serves as both a flocculant and a microbial carrier.

[0069] It also includes a magnetizing device that remagnetizes the separated iron-based magnetic carbon carrier. This structure enhances the magnetism of the iron-based magnetic carbon carrier, increasing its magnetism in the aerobic tank, enabling it to attract and clump together to form larger flocs, and allowing it to fully interact with the magnetic field in the subsequent hydrocyclone, thus improving the degree of separation from the sludge.

[0070] The iron-based magnetic carbon carrier possesses magnetic properties due to its iron content, and the carbon material is porous and positively charged, exhibiting good specific surface area and strong affinity for bacterial flocs, thus serving as a nucleating agent for granular sludge.

[0071] The equalization tank physically filters the wastewater, removing larger impurities, and adjusts the pH value by adding acids and alkalis, thereby improving the biological activity of subsequent biological treatment.

[0072] The anaerobic tank removes nitrogen by ammonifying the difficult-to-treat organic matter, which is then converted into nitrate in the aerobic tank and finally denitrified to produce nitrogen.

[0073] The iron-based magnetic carbon carriers added to the anaerobic tank act as sclerotia to attract bacterial flocs, forming a film on their surface. They then flow into the aerobic tank with the water. The surface of the iron-based magnetic carbon carriers already has an inner layer of anaerobic bacteria, while the outer surface is anchored with aerobic bacteria. At this point, the surface of the iron-based magnetic carbon carriers simultaneously contains aerobic, facultative anaerobic, and anaerobic bacteria, making full use of the space. In the floating bed environment, various bacterial species can efficiently carry out biochemical processes, improving wastewater treatment efficiency. Furthermore, it eliminates the need for return pipes and allows nitrification products to be used as raw materials for denitrification nearby.

[0074] In addition to acting as a carrier, the sludge aggregates, through their own magnetism, cluster together to form larger flocs, which then move throughout the aerobic tank via a floating bed environment, preventing them from accumulating at the bottom. In this state, most of the sludge in the aerobic tank is replenished by the iron-based magnetic carbon carrier, and the boundary between the clear water and the sludge is relatively clear.

[0075] Upon entering the secondary sedimentation tank, the aeration environment is lost, and the heavier flocs settle rapidly, separating from the clear water. This structure reduces flocculation time, decreases water retention time, and improves wastewater treatment efficiency.

[0076] The sediment then enters a hydrocyclone for separation, separating the sludge from the iron-based magnetic carbon carrier. The iron-based magnetic carbon carrier is then reintroduced into the aerobic tank. Since its surface already has an anaerobic bacterial layer, it does not need to be reintroduced into the anaerobic tank. Part of the sludge is added to the anaerobic tank to replenish the anaerobic bacteria, while the other part is discharged for dewatering.

[0077] Through the above structure, the wastewater treatment device can reuse the iron-based magnetic carbon carrier, enabling it to function as both a microbial carrier and a flocculant, thus achieving the reuse of the flocculant. The reuse of the flocculant relies on its magnetism; the magnetic field enhances the separation from the sludge, allowing for differentiation via a hydrocyclone.

[0078] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A bio-enhanced wastewater treatment device based on an iron-based magnetic biocarbon carrier, characterized in that, include: An equalization tank is provided for filtering and adjusting the pH of wastewater. An anaerobic tank provides an anaerobic environment and contains anaerobic bacterial sludge flocs. An aerobic tank is provided with an aeration device at the bottom of the aerobic tank. The aeration device provides air and generates an upflow through the air to form a moving bed biofilm reactor. Secondary sedimentation tank is used for mud-water separation; The dosing device adds acid and alkali solutions to the equalization tank and carbon sources and iron-based magnetic carbon carriers to the anaerobic tank. A hydrocyclone is provided for separating sludge and iron-based magnetic carbon carriers. The hydrocyclone is equipped with a magnetic adjustment structure that generates a magnetic field to improve the separation efficiency of the iron-based magnetic carbon carriers. The hydrocyclone includes a hydrocyclone cylinder, a feed pipe, and an overflow pipe. The hydrocyclone cylinder comprises an upper cylindrical section and a lower conical section. The bottom of the conical section has an underflow port. Several protruding ribs are embedded in the inner wall of the conical section near the underflow port, arranged along the height direction. The cross-section of each rib has an embedding portion and a protruding portion for installation in the conical section. The edge of the protruding portion is an asymmetrical arc, with the curvature of the upstream portion being less than that of the downstream portion. The equalization tank, anaerobic tank, aerobic tank and secondary sedimentation tank are connected in sequence. The iron-based magnetic carbon carrier obtained by hydrocyclone separation is delivered to the aerobic tank. The iron-based magnetic carbon carrier serves as both a flocculant and a microbial carrier.

2. The bio-enhanced wastewater treatment device based on an iron-based magnetic biocarbon carrier according to claim 1, characterized in that, It also includes a magnetizing device that remagnetizes the separated iron-based magnetic carbon carrier.

3. The bio-enhanced wastewater treatment device based on an iron-based magnetic biocarbon carrier according to claim 1, characterized in that, Part of the sludge obtained from hydrocyclone separation is pumped into the anaerobic tank.

4. The bio-enhanced wastewater treatment device based on an iron-based magnetic biocarbon carrier according to claim 1, characterized in that, The magnetic adjustment structure includes an excitation device disposed around the periphery of the cone.

5. A bio-enhanced wastewater treatment device based on an iron-based magnetic biocarbon carrier according to claim 4, characterized in that, The number of excitation devices is several, and the excitation devices are arranged at equal intervals around the cone.

6. A bio-enhanced wastewater treatment device based on an iron-based magnetic biocarbon carrier according to claim 4 or 5, characterized in that, The excitation device is connected to the convex bar, and the excitation device can magnetize the convex bar.

7. A bio-enhanced wastewater treatment device based on an iron-based magnetic biocarbon carrier according to claim 1, characterized in that, An overflow pipe is provided with a propeller blade, which is fixedly connected to the wall of the overflow pipe. The direction of rotation of the propeller blade is consistent with the direction of rotation of the material in the separation device, and the helix angle of the propeller blade points to the top of the cyclone cylinder.

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