Carbon scavenging and phosphorus removal apparatus and method
The magnetic biochar-based sewage treatment system addresses high costs and emissions by enhancing carbon capture and phosphorus removal, improving sludge settlement and biogas production efficiency.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- NANJING UNIV
- Filing Date
- 2024-12-17
- Publication Date
- 2026-06-03
Smart Images
Figure 2026091203000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of sewage treatment, specifically to a carbon capture and phosphorus removal device and method. It does.
Background Art
[0002] In the prior art, the activated sludge method is mainly adopted for sewage treatment, but the conventional activated sludge method has problems such as high energy consumption and high carbon emissions. The organic carbon in urban wastewater is rich in chemical energy, and efficiently capturing the organic carbon in the influent water is one of the important measures to achieve the low-carbon operation of wastewater plants. For the technology of capturing organic carbon in wastewater, there are mainly chemical enhanced primary treatment, high-load membrane separation technology, high-load activated sludge method, etc. Although the above technologies can achieve high organic carbon capture efficiency, they rely on a large amount of flocculant injection and high investment costs, resulting in high operating costs and being difficult to widely popularize and apply. The organic carbon in urban wastewater is rich in chemical energy, and efficiently capturing the organic carbon in the influent water is one of the important measures to achieve the low-carbon operation of wastewater plants. For the technology of capturing organic carbon in wastewater, there are mainly chemical enhanced primary treatment, high-load membrane separation technology, high-load activated sludge method, etc. Although the above technologies can achieve high organic carbon capture efficiency, they rely on a large amount of flocculant injection and high investment costs, resulting in high operating costs and being difficult to widely popularize and apply. The organic carbon in urban wastewater is rich in chemical energy, and efficiently capturing the organic carbon in the influent water is one of the important measures to achieve the low-carbon operation of wastewater plants. For the technology of capturing organic carbon in wastewater, there are mainly chemical enhanced primary treatment, high-load membrane separation technology, high-load activated sludge method, etc. Although the above technologies can achieve high organic carbon capture efficiency, they rely on a large amount of flocculant injection and high investment costs, resulting in high operating costs and being difficult to widely popularize and apply. The organic carbon in urban wastewater is rich in chemical energy, and efficiently capturing the organic carbon in the influent water is one of the important measures to achieve the low-carbon operation of wastewater plants. For the technology of capturing organic carbon in wastewater, there are mainly chemical enhanced primary treatment, high-load membrane separation technology, high-load activated sludge method, etc. Although the above technologies can achieve high organic carbon capture efficiency, they rely on a large amount of flocculant injection and high investment costs, resulting in high operating costs and being difficult to widely popularize and apply. The organic carbon in urban wastewater is rich in chemical energy, and efficiently capturing the organic carbon in the influent water is one of the important measures to achieve the low-carbon operation of wastewater plants. For the technology of capturing organic carbon in wastewater, there are mainly chemical enhanced primary treatment, high-load membrane separation technology, high-load activated sludge method, etc. Although the above technologies can achieve high organic carbon capture efficiency, they rely on a large amount of flocculant injection and high investment costs, resulting in high operating costs and being difficult to widely popularize and apply. The organic carbon in urban wastewater is rich in chemical energy, and efficiently capturing the organic carbon in the influent water is one of the important measures to achieve the low-carbon operation of wastewater plants. For the technology of capturing organic carbon in wastewater, there are mainly chemical enhanced primary treatment, high-load membrane separation technology, high-load activated sludge method, etc. Although the above technologies can achieve high organic carbon capture efficiency, they rely on a large amount of flocculant injection and high investment costs, resulting in high operating costs and being difficult to widely popularize and apply. The organic carbon in urban wastewater is rich in chemical energy, and efficiently capturing the organic carbon in the influent water is one of the important measures to achieve the low-carbon operation of wastewater plants. For the technology of capturing organic carbon in wastewater, there are mainly chemical enhanced primary treatment, high-load membrane separation technology, high-load activated sludge method, etc. Although the above technologies can achieve high organic carbon capture efficiency, they rely on a large amount of flocculant injection and high investment costs, resulting in high operating costs and being difficult to widely popularize and apply. Biochar is an ideal adsorbent for soluble organic matter. However, it is difficult to separate biochar from water. Also, introducing magnetic Fe3O4 into the biochar matrix to prepare magnetic biochar is an effective method to solve this problem. Fe3O4 can form a complex with phosphate and enhance the phosphorus removal effect. Therefore, exploring the technology for enhancing carbon capture of wastewater in the high-load activated sludge method based on magnetic biochar can provide support for the optimal control and popularization of the process. At present, there is still a need for further research on the combined use of magnetic biochar and high-load activated sludge in wastewater treatment. Biochar is an ideal adsorbent for soluble organic matter. However, it is difficult to separate biochar from water. Also, introducing magnetic Fe3O4 into the biochar matrix to prepare magnetic biochar is an effective method to solve this problem. Fe3O4 can form a complex with phosphate and enhance the phosphorus removal effect. Therefore, exploring the technology for enhancing carbon capture of wastewater in the high-load activated sludge method based on magnetic biochar can provide support for the optimal control and popularization of the process. At present, there is still a need for further research on the combined use of magnetic biochar and high-load activated sludge in wastewater treatment. Biochar is an ideal adsorbent for soluble organic matter. However, it is difficult to separate biochar from water. Also, introducing magnetic Fe3O4 into the biochar matrix to prepare magnetic biochar is an effective method to solve this problem. Fe3O4 can form a complex with phosphate and enhance the phosphorus removal effect. Therefore, exploring the technology for enhancing carbon capture of wastewater in the high-load activated sludge method based on magnetic biochar can provide support for the optimal control and popularization of the process. At present, there is still a need for further research on the combined use of magnetic biochar and high-load activated sludge in wastewater treatment. Biochar is an ideal adsorbent for soluble organic matter. However, it is difficult to separate biochar from water. Also, introducing magnetic Fe3O4 into the biochar matrix to prepare magnetic biochar is an effective method to solve this problem. Fe3O4 can form a complex with phosphate and enhance the phosphorus removal effect. Therefore, exploring the technology for enhancing carbon capture of wastewater in the high-load activated sludge method based on magnetic biochar can provide support for the optimal control and popularization of the process. At present, there is still a need for further research on the combined use of magnetic biochar and high-load activated sludge in wastewater treatment. Biochar is an ideal adsorbent for soluble organic matter. However, it is difficult to separate biochar from water. Also, introducing magnetic Fe3O4 into the biochar matrix to prepare magnetic biochar is an effective method to solve this problem. Fe3O4 can form a complex with phosphate and enhance the phosphorus removal effect. Therefore, exploring the technology for enhancing carbon capture of wastewater in the high-load activated sludge method based on magnetic biochar can provide support for the optimal control and popularization of the process. At present, there is still a need for further research on the combined use of magnetic biochar and high-load activated sludge in wastewater treatment. Biochar is an ideal adsorbent for soluble organic matter. However, it is difficult to separate biochar from water. Also, introducing magnetic Fe3O4 into the biochar matrix to prepare magnetic biochar is an effective method to solve this problem. Fe3O4 can form a complex with phosphate and enhance the phosphorus removal effect. Therefore, exploring the technology for enhancing carbon capture of wastewater in the high-load activated sludge method based on magnetic biochar can provide support for the optimal control and popularization of the process. At present, there is still a need for further research on the combined use of magnetic biochar and high-load activated sludge in wastewater treatment. Biochar is an ideal adsorbent for soluble organic matter. However, it is difficult to separate biochar from water. Also, introducing magnetic Fe3O4 into the biochar matrix to prepare magnetic biochar is an effective method to solve this problem. Fe3O4 can form a complex with phosphate and enhance the phosphorus removal effect. Therefore, exploring the technology for enhancing carbon capture of wastewater in the high-load activated sludge method based on magnetic biochar can provide support for the optimal control and popularization of the process. At present, there is still a need for further research on the combined use of magnetic biochar and high-load activated sludge in wastewater treatment.
Summary of the Invention
[0003] The present invention provides a carbon capture and phosphorus removal device, A wastewater tank with a first agitator installed inside, The SBR reactor is in communication with the wastewater tank, and the SBR reactor is a hollow cylindrical warehouse It is a body, and a drain pipe is connected to the middle of the outer wall of the SBR reactor, the outer wall of the SBR reactor A sludge discharge pipe and an aeration pipe are connected to the lower part of the SBR reactor, and the SBR reactor interior is located at the top of the SBR reactor. A second stirrer is provided that extends to the bottom, and an electromagnet is provided at the bottom of the SBR reactor. The wastewater tank and the SBR reactor are connected via a wastewater pipe, and a wastewater pump is installed on the wastewater pipe. The SBR reactor that was set up, A denitrification reaction tank communicating with the aforementioned drain pipe, An anaerobic digester communicating with the sludge discharge pipe, wherein biogas is provided at the top of the anaerobic digester. An anaerobic digester is provided with a discharge pipe and a third agitator is provided at the bottom of the anaerobic digester, A dozer is provided on one side of the top of the SBR reactor, A sludge removal device communicating with the anaerobic digester, wherein the sludge removal device includes a warehouse body, and the warehouse body An ultrasonic generator is provided inside the body, and a first motor is provided at the top of the warehouse body, A rotating shaft is connected to the output shaft of a motor, and a plurality of hydraulic telescopic rods are mounted on the side wall of the rotating shaft. A guide plate is fixedly connected to the lower end of each of the hydraulic telescopic rods, and the guide The plate has a two-layer structure; the upper layer is made of austenitic stainless steel, and the lower layer is This is a martensitic stainless steel, where austenitic stainless steel material is magnetic. There is no magnetic attraction between the martensitic stainless steel and magnetic biochar, and the martensitic stainless steel does not exhibit magnetic attraction to magnetic biochar. It has an air suction effect, and a second motor is connected to the top end of each of the hydraulic telescopic rods, and the rotating shaft Multiple stirring rods are provided on the outer wall, and a reflux tank is provided on the side wall of the warehouse body, and the reflux A scraper is provided on the tank side, and the reflux tank is connected to the dozer via a reflux pipe. It is equipped with a sludge removal device. In one aspect of the present invention, an air pump is provided at the end of the aeration pipe, and the drainage is discharged onto the drain pipe. A pump is provided, and a sludge discharge pump is installed on the sludge discharge pipe. In this application, an air pump is used to control the aeration rate, and a drainage pump is used to control the drainage flow rate and velocity. By controlling and regulating sludge discharge via the sludge discharge pump, the entire system can be stabilized. It can be made to operate precisely. In one aspect of the present invention, the electromagnet has a disc-shaped structure, and the cross-sectional area of the electromagnet is SBR This represents 75-100% of the reactor's base area. In this application, the settling time of sludge and magnetic biochar can be easily controlled using an electromagnet. By adjusting the covering area of the electromagnet, the settling efficiency of sludge and magnetic biochar can be ensured. It is possible. In one aspect of the present invention, the denitrification reaction tank is provided with a plurality of floating packing material assemblies inside. It is a rectangular box-shaped structure, and the floating packing assembly is a mesh box and the mesh The interior of the digester box is made of polyethylene material, and the anaerobic digester is located inside It includes an empty cylindrical tank and an insulating layer that surrounds the outside of the tank. In this application, the cylindrical storage body facilitates the mixing, stirring, and reaction of wastewater inside the SBR reactor. Furthermore, the flotation packing assembly in the denitrification reaction tank enables deep denitrification of wastewater, and the insulating layer This allows for easier fermentation and reaction of sludge inside the anaerobic digester. In one aspect of the present invention, a plurality of grooves are provided on the side wall of the rotating shaft, and each of the hydraulic extension rods The guide plates are provided in a one-to-one ratio within each groove, and the guide plate has a fan-shaped structure. A fixed block is provided inside the cart, and the fixed block is fixedly connected to the bottom of the hydraulic telescopic rod, and the hydraulic telescopic rod is telescoped by the second motor so that the fixed block slides up and down in the groove, and synchronously drives the guide plate to move up and down. A slot is provided in the upper part of the side wall of the bin body, and the reflux tank is provided in the slot. A slider is provided at the bottom of the reflux tank, and the s lider is slidably connected to a sliding groove provided at the bottom of the slot. A hydraulic push rod is provided at a position below the slot on the side wall of the bin body. The output end of the hydraulic push rod is fixedly connected to the outside of the reflux tank, and the hydraulic push rod drives the reflux tank to slide in the slot. When the reflux tank slides from the inside to the outermost side of the slot, the reflux pipe correspondingly is located directly above the reflux tank. In this application, the anaerobic digested magnetic biochar can be quickly washed and de-sludged by the de-sludging device, and can be recovered in a timely manner. The magnetic biochar can be adsorbed by the fan-shaped guide plate, and at the same time the stirring effect can be enhanced. As another aspect of the present invention, both sides of the first motor are fixedly connected to the bin body through fixed rods. There are three second motors, and there are three corresponding hydraulic telescopic rods and the guide plates respectively. In this application, by adjusting the number of magnetic guide plates, the washing efficiency of magnetic biochar can be ensured while increasing the recovery speed. The present invention further provides a carbon capture and phosphorus removal method based on the above carbon capture and phosphorus removal device. This method includes the following steps: S1. Water injection and stirring: Inject sewage into the sewage tank, uniformly stir it with the first stirrer, and then transport the sewage to the SBR reactor through the sewage pipe and, S2. SBR treatment: The operation modes of the SBR reactor include a contact stage, a sedimentation stage, a drainage stage, and a stabilization stage including Contact stage: Put magnetic biochar into the SBR reactor by a dozer, and the input amount of the magnetic biochar is 100 - 500 mg / L. After input, turn on the second stirrer for stirring, and the rotation speed is 100 - 150 rpm, stir for 10 - 15 min Sedimentation stage: Turn off the second stirrer, energize the electromagnet to form an electromagnetic field, and under the action of the electromagnetic field, promote the sedimentation of magnetic biochar and sludge. The energization time is 10 - 30 min and is Drainage stage: Open the drain pump, transport the sewage in the SBR reactor to the denitrification reaction tank through the drain pipe, perform denitrification treatment on the sewage entering the denitrification reaction tank in the denitrification reaction tank, and when the sewage in the SBR reactor is drained to half of the water level, close the drain pump and is Stabilization stage: Open the air pump, aerate the sewage and sludge in the SBR reactor through the aeration pipe, continuously aerate for 4 0 - 50 min, control the solubility to 1.5 - 2 mg / L, and at the same time of aeration, turn on the second stir rer for stirring. The rotation speed of the second stirrer is 60 - 150 rpm. Then open the sludge discharge pump and discharge 1 / 4 - 1 / 3 of the sludge in the SBR reactor to the anaerobic digestion tank through the sludge discharge pipe and In the SBR reactor, the biochar in the magnetic biochar plays a role in removing organic carbon in the sewage. The specific mechanism is that during the wastewater treatment process, a biofilm is formed on the surface of the biochar, and a synergistic effect of the adsorption of activated carbon and the oxidation and decomposition of organic carbon by microorganisms occurs and the magnetic powder in the magnetic biochar plays a role in removing phosphorus. The specific mechanism is Fe 3O4 forms a complex with phosphate, thereby enhancing the phosphorus removal effect. In the denitrification reactor, it is also necessary to denitrify the wastewater from which organic carbon and phosphorus have been removed. The basic mechanism is that sludge is loaded onto a floating packing material assembly in a denitrification reactor and bio A film is formed, and as wastewater passes through the biofilm, microorganisms perform actions such as adsorption and decomposition. The purpose is to decompose nitrogen elements in wastewater into gaseous nitrogen through use, thereby achieving the objective of denitrification. S3, Circulation: Repeat S1 and S2 to treat the next batch of wastewater. S4. Sludge fermentation: Adjust the internal temperature of the anaerobic digester to 37±0.2℃ and stir with the third agitator. The speed is 100-120 rpm, and fermentation takes place for 20-25 days to obtain the remaining sludge, and biogas Biogas from inside the anaerobic digester is collected via a discharge pipe, and then the remaining sludge is removed by a desludge processing unit. Discharge into the container. In an anaerobic digester, the remaining sludge is reused to produce biogas through resource recovery. The specific mechanism involves the anaerobic digestion of sludge, which converts organic matter in the sludge into biogas. Anaerobic digestion involves conversion, including hydrolysis, oxidation, hydrogen production, acetic acid production, and methane production. It includes the following four stages: S5, Magnetic biochar recovery: The remaining sludge is passed through the main body of the desludge removal device, water is added to the main body of the device, water The amount added is 3 to 4 times the weight of the sludge, and the ultrasonic generator inside the warehouse is opened, generating ultrasonic waves. The ultrasonic output of the device is adjusted to 800-1200W to perform ultrasonic treatment, and the first motor is operated simultaneously. The opening and the rotation shaft is rotated by the first motor, guiding the magnetic biocarbon onto the plate. It is attached to the underside of the torch and controls one of the second motors every 5 minutes to control the corresponding hydraulic telescopic rod. The guide plate is moved upwards to the height of the reflux tank by extending and retracting the guide plate, and the axis of rotation is the guide plate As the guide plate rotates, the scraper removes magnetic biocarbon that has adhered to the underside of the guide plate. The material is scraped off and dropped into the reflux tank, and the magnetic biochar recovered in the reflux tank is then transferred through the reflux pipe. Transported to a bulldozer for reuse, The method for preparing the magnetic biochar is as follows: biomass raw material and stainless steel After mixing steel balls in a mass ratio of 1:100 and loading them into a stainless steel polishing tank for polishing, 2 The material is passed through a 00-mesh sieve to obtain biomass powder, and the diameter of the stainless steel spheres is 3 mm. The biomass powder and magnetic powder are mixed in a mass ratio of 1:2 to 4 and then milled in a planetary ball mill. Loaded into the ball mill, the planetary ball mill rotates at a speed of 300-400 rpm for 10 After operating for approximately 12 hours, remove and wash three times alternately with ultrapure water and ethanol, then heat at 60-70°C. After drying, magnetic biochar is obtained. The aforementioned biomass raw material is one of the following: coconut shells, wood chips, or rice husk biochar. The magnetic powder is Fe3O4 powder, and the diameter of the magnetic powder is less than 2 mm. [Effects of the Invention]
[0004] The present invention has the following beneficial effects. (1) The present invention involves introducing magnetic biochar into a high-load contact-stabilized SBR reactor, and magnetic biochar It not only functions as a carrier for microbial adhesion, but also forms complexes with phosphorus, and organic carbon in wastewater. This synchronously promotes phosphorus adsorption and, under constant stirring action, ensures a uniform distribution of the flow field in the reaction flow pattern. This can achieve the desired effect, increasing the contact efficiency between wastewater, sludge, and magnetic biochar, and improving dissolution. It further enhances the capture effect of organic matter, promotes the adsorption of organic carbon and phosphorus in wastewater, and provides stable and At the same time, the magnetic material in magnetic biochar ensures efficient carbon scavenging and phosphorus removal, while also providing microorganisms. It also exhibits a magnetic effect, adsorbing organic carbon and phosphorus in wastewater and subsequently aiding in anaerobic digestion of sludge. This can further improve the efficiency of energy resource recovery. (2) The apparatus of the present invention employs an external electromagnet, and when the SBR reactor operates to the sedimentation stage, By energizing the electromagnets, an electromagnetic field is created, promoting the rapid settling of magnetic biochar into biochar sludge. The adsorption action enables the rapid and synchronous settlement of sludge, improving sludge settlement efficiency, and consequently This achieves highly efficient cutoff of particulate and colloidal organic carbon, shortening the hydraulic holding time and reducing the reaction This can significantly improve the impact load resistance capacity of the equipment. (3) The present invention provides an anaerobic digestion treatment for a mixture of discharged magnetic biochar and sludge. This allows for a significant improvement in biogas yield and a reduction in the startup time of the anaerobic digester. Therefore, the methane content in biogas increases, improving the efficiency of wastewater energy conversion and resource utilization. Furthermore, magnetic biochar after anaerobic digestion can be easily washed and reused, and is equipped with a bi The charcoal sludge removal device has a simple structure, is easy to operate, and operates stably, ultimately removing organic matter from wastewater. It effectively improves carbon capture efficiency while also having a good removal effect on phosphorus, and stains It has a fast mudset rate, low energy and material consumption, and is stable, highly efficient, and low energy consumption. This can achieve carbon capture and phosphorus removal effects in wastewater. [Brief explanation of the drawing]
[0005] [Figure 1] This is a schematic diagram showing the overall structure of the carbon capture and phosphorus removal device of the present invention. [Figure 2] This is a front view of the carbon capture and phosphorus removal apparatus of the present invention. [Figure 3] This is a schematic diagram of the structure of the biocarbon sludge removal apparatus in the carbon capture and phosphorus removal apparatus of the present invention. [Figure 4]This is a schematic diagram showing the internal structure of the biocarbon sludge removal apparatus in the carbon capture and phosphorus removal apparatus of the present invention. [Figure 5] This is a side view of the biocarbon sludge removal apparatus in the carbon capture and phosphorus removal apparatus of the present invention. [Figure 6] This is a front view of the biochar sludge removal apparatus in the carbon capture and phosphorus removal apparatus of the present invention, with the warehouse body omitted. [Figure 7] This is a front view of the biochar desludge apparatus in the carbon capture and phosphorus removal apparatus of the present invention, after the warehouse body has been omitted and the biochar reflux tank has been moved. [Figure 8] This is a schematic diagram showing the connection structure between the rotating shaft and the guide plate of the biocarbon sludge removal device in the carbon capture and phosphorus removal device of the present invention. [Figure 9] This is a schematic diagram showing the internal structure of the denitrification reactor in the carbon capture and phosphorus removal apparatus of the present invention.
[0006] [Explanation of symbols] 1. Sewage tank 11 1st stirrer 12. Sewer pipes 13. Sewage pump 2 SBR reactors 21 Drain pipe 22 Sludge discharge pipe 23 Aeration tube 24 Second stirrer 25 Electromagnet 26 Air pump 27 Drainage pump 28 Sludge discharge pump 3. Denitrification reactor 31. Floating Filler Assembly 4. Anaerobic digester 41 Biogas discharge pipe 42 3rd stirrer 43. Insulation layer 44 Tank body 5 Dozer 51 Reflux tube 6. Biocarbon sludge removal equipment 61 Biocarbon reflux tank 611 Slider 612 Scraper 62 Warehouse Main Body 621 slots 622 Sliding groove 63 First Motor 631 Fixed Rod 64 rotation axes 641 Groove 642 Agitation Rod 65 Second Motor 66 Hydraulic Telescopic Rod 67 Guide Plate 671 Fixed Block 68 Hydraulic pushrod 69 Ultrasonic generator [Modes for carrying out the invention]
[0007] Example 1: The carbon capture and phosphorus removal device is The system includes a wastewater tank 1 for storing wastewater, and as shown in Figure 2, a first agitator is located inside the wastewater tank 1. 11 was established, The SBR reactor 2 is connected to the wastewater tank 1, and as shown in Figures 1 and 2, the SBR reactor 2 is a hollow cylindrical warehouse body, and a drain pipe 21 is connected to the middle of the outer wall of the SBR reactor 2. The sludge discharge pipe 22 and aeration pipe 23 are connected to the lower part of the outer wall of the SBR reactor 2, and aeration An air pump 26 is provided at the end of pipe 23, and a drainage pump 27 is provided on drainage pipe 21. A sludge discharge pump 28 is installed on the sludge discharge pipe 22, and an SBR reaction is performed at the top of the SBR reactor 2. A second stirrer 24 is provided that extends to the bottom of the container 2, and four stirring shafts are located on the stirring shaft of the second stirrer 24. A stirring paddle is provided, and the ratio of the diameter of the stirring paddle to the radius of the SBR reactor 2 is 0.6:1. Yes, the distance from the stirring paddle at the very bottom to the bottom of SBR reactor 2 is It is 15% of the height, and an electromagnet 25 is provided at the bottom of the SBR reactor 2, and the electromagnet 25 is circular It has a disc-shaped structure, and the cross-sectional area of the electromagnet 25 is 90% of the bottom surface area of the SBR reactor 2, Tank 1 and SBR reactor 2 are connected via a wastewater pipe 12, and a wastewater pump 13 is located on the wastewater pipe 12. Established, Here, the air pump 26, drainage pump 27, sludge discharge pump 28, and sludge used in this implementation are All water pumps 13 are existing products; for example, the air pump 26 is RB-51DH- A 2 / 2.2kW wastewater aeration vacuum pump is used, and the drainage pump 27 and wastewater pump 13 are 15 The 0ZW180-14 self-priming wastewater suction pump is used, and the sludge discharge pump 28 is 80ZJ Q70-12-5.5 A sludge discharge pump may be used, and this is merely an example. In actual application, it can be adjusted and replaced as needed, and the embodiments of this application So, it's not particularly limited, Furthermore, the drain pipe 21, sludge discharge pipe 22, aeration pipe 23, and sludge described in the embodiments of this application Please note that all water pipes 12 have a normal piping structure, and here, the drain pipe 21 is S Used to transport wastewater from BR reactor 2 to denitrification reactor 3, the sludge discharge pipe 22 is SB The aeration pipe 23 is used to discharge the sludge in the R reactor 2 to the anaerobic digester 4, and SBR Used to supply compressed air by the air pump 26 into the reactor 2, and wastewater pipe 12 is used to introduce wastewater stored in wastewater tank 1 into SBR reactor 2. The denitrification reaction tank 3 is connected to the drain pipe 21, and as shown in Figures 1 and 9, the denitrification reaction tank 3 It is a rectangular box-shaped body with four floating filler assemblies 31 inside, and floating filler Material assembly 31 consists of a mesh box and polyethylene filled inside the mesh box. It consists of materials, with the polyethylene material being a commercially available product and having a density of 0.95 g / cm³. 3 And, The system is equipped with an anaerobic digester 4 that communicates with the sludge discharge pipe 22, and as shown in Figure 2, the anaerobic digester 4 It includes a hollow cylindrical tank body 44 and an insulating layer 43 that surrounds the outside of the tank body 44, and is anaerobic. A biogas discharge pipe 41 is provided at the top of the filtration tank 4, and a third agitator 4 is provided at the bottom of the anaerobic digester tank 4. 2 is provided, and the insulation layer 43 is a commercially available polystyrene board with a thickness of 4 cm. The SBR reactor 2 is equipped with a dozer 5 located on the top side, as shown in Figure 1, and the actual application The dozer 5 used in this example is a prior art drug delivery device, for example, manufactured by Shengmao Livestock Company. It may also be a fully automated intelligent biological dozer for solid powders. The sludge removal device 6 is connected to the anaerobic digester 4, and as shown in Figures 2 to 4, the sludge removal device 6 is a warehouse The main body 62 is included, and an electronically controlled warehouse door is provided between the warehouse body 62 and the anaerobic digester 4, and the warehouse body An ultrasonic generator 69 is provided inside 62, and a first motor 63 is provided at the top of the warehouse body 62. The first motor 63 is a geared motor, and both sides of the first motor 63 are fixed rods 63 The rotating shaft 64 is fixedly connected to the warehouse body 62 via 1, and is in contact with the output shaft of the first motor 63. Continuing, three hydraulic telescopic rods 66 are provided on the side wall of the rotating shaft 64, and each hydraulic telescopic rod A guide plate 67 is fixedly connected to the lower end of 66, and the guide plate 67 has a two-layer structure. Yes, the upper layer is made of austenitic stainless steel material, for example, 304 stainless steel manufactured by Koto Metal Co., Ltd. It may be steel plate, and the lower layer may be martensitic stainless steel, for example, 4 made by Koto Metal Co., Ltd. 10. Stainless steel sheet may also be used, and in a specific implementation example, the thickness of the upper layer is 5 mm. It may be so, and the thickness of the lower layer may be 2 mm, and the lower layer is martensitic stainless steel The steel can adsorb magnetic biochar doped in the sludge, and each hydraulic telescopic rod 66 A second motor 65 is connected to the top end of the second motor 65, which is a pushrod motor, and rotates Multiple stirring rods 642 are provided on the outer wall of the rotating shaft 64, and a reflux tank 61 is located on the side wall of the warehouse body 62. A scraper 612 is provided on the reflux tank 61 side, and the reflux tank 61 has a reflux pipe 51. It is connected to the dozer 5 via, Here, the ultrasonic generator 69 used in the embodiment of this application is a prior art product, for example, It may also be an ultrasonic vibration generator manufactured by Coer Ultrasonics Co., Ltd., and the first example used in the embodiment of this application Motor 63 is a geared motor manufactured by Hebei Tianqiao Machinery and Equipment Manufacturing Co., Ltd., and hydraulic telescopic rod 6 6. The second motor 65 is a complete piece of equipment, for example, a DT manufactured by Beijing Botian Shunda Machinery & Electrical Company. This is a DTZ type electric hydraulic push rod, Furthermore, the reflux pipe 51 described in the embodiment of this application is a normal piping structure, and within the reflux tank 61 The collected magnetic biochar is used to divert to dozer 5 and then transported to reflux pipe 51. Equipped with a solid particle transport pump manufactured by the equipment factory, As shown in Figures 4 to 8, multiple grooves 641 are provided on the side wall of the rotating shaft 64, and each hydraulic extension The rods 66 are arranged in a one-to-one correspondence within each groove 641, and the guide plate 67 has a fan-shaped structure. A fixing block 671 is provided inside the guide plate 67, and the hydraulic telescopic rod 6 The bottom of 6 is fixedly connected to the fixed block 671, and the hydraulic extension is controlled by the second motor 65. The rod 66 is extended and retracted to cause the fixing block 671 to slide up and down within the groove 641. It moves and drives the guide plate 67 to move up and down in sync with the side wall of the warehouse body 62 A slot 621 is provided at the top, and the reflux tank 61 is provided inside the slot 621, reflux tank 6 A slider 611 is provided at the bottom of 1, and the slider 611 is provided at the bottom of slot 621 The slot 621 in the side wall of the warehouse body 62 is slidably connected to the recessed sliding groove 622. A hydraulic push rod 68 is provided at a position below it, and the output of the hydraulic push rod 68 The end is fixedly connected to the outside of the reflux tank 61 and connected to the reflux tank 61 via a hydraulic push rod 68. The device is driven to slide within slot 621, and the reflux tank 61 moves from the inside of slot 621 outwards. When it slides to its outermost position towards the side, the reflux pipe 51 is correspondingly positioned directly above the reflux tank 61. . The hydraulic pushrod 68 used in the embodiments of this application is a prior art product, for example, Beijing Zhongdian. It may also be a high-thrust DC motor telescopic rod manufactured by Hongli Machinery & Electrical Company. Furthermore, the reflux tank 61 described in the embodiment of this application has a groove-like structure with an open upper end, To 621 is a rectangular opening in the side wall of the sludge removal storage 62, and its shape and size are the same as the reflux tank. It conforms to the structure of 61. Example 2: This example differs from Example 1 in the following respects, with two second motors 6 on the rotating shaft 64. 5 is provided, and in response to this, a guide plate 67, a slider 611 and a hydraulic telescopic rod are provided. The numbers in D66 are all 2. Example 3: This example differs from Example 1 in the following respects, with four second motors 6 on the rotating shaft 64. 5 is provided, and in response to this, a guide plate 67, a slider 611 and a hydraulic telescopic rod are provided. The number of characters in D66 is always four. Explanation: As the number of guide plate settings increases, the adsorption effect of magnetic biochar improves. The degree of difficulty in scraping with the scraper 612 also increases, so the guide plate The number 67 needs to be set rationally, and the setting parameters in Example 1 are optimal. Example 4: This example differs from Example 1 in the following respects, the cross-sectional area of the electromagnet 25 is the same as that of the SBR reactor. This is 85% of the base area of 2. Example 5: This example differs from Example 1 in the following respect: the denitrification reactor 3 has six flotation packing inside. A box in which the filling assembly 31 is placed, and polyethylene is filled inside the mesh box. The density of the ethylene material is 0.92 g / cm³. 3 That is the case. Example 6: The carbon scavenging and phosphorus removal method described in this example is the same as the carbon scavenging and phosphorus removal method described in Example 1. Based on the device, the following steps are included: S1. Water injection and agitation: After the wastewater is injected into the wastewater tank 1 and uniformly agitated by the first agitator 11, The wastewater is transported to the SBR reactor 2 via the wastewater pipe 12. S2, SBR treatment: The operating modes of SBR reactor 2 are contact stage, sedimentation stage, drainage stage and stabilization. Including the steps, Contact stage: Magnetic biochar is introduced into the SBR reactor 2 by the dozer 5, and the magnetic biochar is added The input volume is 200 mg / L. After adding the substance, the second stirrer 24 is opened and the mixture is stirred, and the rotation speed is The rotation speed is 100 rpm, and the mixture is stirred for 15 minutes. Settling stage: The second agitator 24 is energized by an external power supply to the electromagnet 25, and the electromagnet 25 is energized. This creates an electromagnetic field, and under the influence of the electromagnetic field, the settling of magnetic biochar and sludge is promoted, and the energizing time is It was 15 minutes. Drainage stage: The drainage pump 27 is opened, and the wastewater in the SBR reactor 2 is drained through the drain pipe 21 to undergo denitrification. The wastewater is transported to tank 3 and enters the denitrification reaction tank 3, where it is denitrified and then refurbished in the SBR reaction tank. When the wastewater in the drainer 2 has been drained to half its level, the drain pump 27 is closed. Stabilization stage: The air pump 26 is opened, and wastewater and sludge in the SBR reactor 2 are discharged through the aeration pipe 23. Aeration is performed, continuous aeration for 50 minutes, and the dissolved oxygen concentration is controlled to 1.6 mg / L, simultaneously with aeration. The second agitator 24 was opened and stirred, with a rotation speed of 80 rpm, and then The sludge discharge pump 28 is opened, and 1 / 3 of the sludge in the SBR reactor 2 is discharged through the sludge discharge pipe 22. Discharge into anaerobic digester 4, S3, Circulation: Repeat S1 and S2 to treat the next batch of wastewater. S4, Sludge fermentation: The internal temperature of the anaerobic digester 4 is adjusted to 37°C, and the stirring speed of the third agitator 42 is adjusted. The speed was adjusted to 110 rpm, and fermentation was carried out for 22 days to obtain the remaining sludge, and the biogas discharge pipe 41 was used. Biogas from inside the anaerobic digester 4 is collected via this process, and the remaining sludge is then discharged into the sludge removal device 6. broth, S5, Magnetic biochar recovery: The remaining sludge is passed through the storage body 62 of the sludge removal device 6, and water is added to the storage body 62. In addition, the amount of water added is 3.5 times the weight of the sludge, and the ultrasonic generator 69 inside the warehouse body 62 Open the device, adjust the ultrasonic output of the ultrasonic generator 69 to 1000W, and perform ultrasonic processing simultaneously. The first motor 63 is opened, and the first motor 63 rotates the rotating shaft 64, and the magnetic biochar is opened. The second motor 65 is driven to adhere to the lower surface of the guide plate 67, and every 5 minutes The corresponding hydraulic telescopic rod 66 is extended and retracted by controlling the two, and the guide plate 67 moves to the reflux tank 61 The rotating shaft 64 is driven to move upward to the height of the guide plate 67, causing the guide plate 67 to rotate. Therefore, the scraper 612 scrapes the magnetic biochar attached to the underside of the guide plate 67. It is dropped and allowed to fall into the reflux tank 61, and the magnetic biochar recovered in the reflux tank 61 is transferred to the reflux pipe 5 Transported to dozer 5 via 1 for reuse, The method for preparing magnetic biochar is as follows: Biomass raw material and stainless steel The spheres were mixed in a 1:100 mass ratio, loaded into a stainless steel polishing tank, and polished, then 200 The material is passed through a mesh sieve to obtain biomass powder, and the diameter of the stainless steel balls is less than 3 mm. Then, the biomass powder and magnetic powder are mixed in a mass ratio of 1:3 and loaded into a planetary ball mill. The planetary ball mill was run for 11 hours at a rotational speed of 350 rpm and then removed. Afterward, the mixture is washed three times alternately with ultrapure water and ethanol, and dried at 65°C to obtain magnetic biochar. The biomass raw material is coconut shell biochar. The magnetic powder is Fe3O4 powder, and its diameter is less than 2 mm. Example 7: This example differs from Example 6 in the following respects: Contact stage: Magnetic biochar input amount is 100 mg / L, and rotation speed is 120 rpm. Stir for 12 minutes, Settling stage: The energizing time is 10 min. Stabilization stage: The continuous aeration time is 40 min, and the dissolved oxygen concentration is controlled to 1.5 mg / L. The rotation speed of the second agitator 24 is 60 rpm, and it is connected to the SBR reactor 2 via the sludge discharge pipe 22. One-quarter of the sludge is discharged into the anaerobic digester 4. Example 8: This example differs from Example 6 in the following respects: Contact stage: The amount of magnetic biochar input is 400 mg / L, and the rotation speed is 130 rpm. Stir for 13 minutes, Settling stage: The energizing time is 20 mins. Stabilization stage: The continuous aeration time is 45 min, and the dissolved oxygen concentration is controlled to 1.8 mg / L. The rotational speed of the second agitator 24 is 120 rpm, and the SBR reactor is supplied via the sludge discharge pipe 22. One-quarter of the sludge in section 2 is discharged into the anaerobic digester 4. Example 9: This example differs from Example 6 in the following respects: Contact stage: The amount of magnetic biochar input is 500 mg / L, and the rotation speed is 150 rpm. Stir for 10 minutes, Settling stage: The energizing time is 30 min. Stabilization stage: The continuous aeration time is 50 min, and the dissolved oxygen concentration is controlled to 2 mg / L, and the second The rotation speed of the agitator 24 is 150 rpm, and it flows into the SBR reactor 2 via the sludge discharge pipe 22. One-third of the sludge is discharged into the anaerobic digester 4. Description: In Examples 6-9, the step parameters of the SBR treatment in S2 were evaluated, and the treatment If the amount of wastewater to be treated is small, select the combination of parameters in Example 6 and treat accordingly. If the amount of wastewater is large, select the combination of parameters in Example 8. Example 10: This example differs from Example 6 in the following respects: When preparing magnetic biochar, biomass powder and magnetic powder are mixed in a mass ratio of 1:2. Loaded into a star ball mill and ball milling is performed, with the planet ball mill rotating at a speed of 300 rpm. Operate for 10 hours, dry at 60°C, The biomass raw material is rice husk biochar. Example 11: This example differs from Example 6 in the following respects: When preparing magnetic biochar, biomass powder and magnetic powder are mixed in a mass ratio of 1:4. Loaded into a star ball mill, the ball mill is operated at a rotational speed of 400 rpm. Operate for 12 hours, dry at 70°C, The biomass raw material is wood chip biochar. Description: In Examples 6, 10, and 11, the parameters of the major influencing factors were bi This is the mass ratio of omas powder to magnetic powder; the higher the proportion of magnetic powder, the more effective the SBR treatment and the more times it is used. While the yielding effect is good, it may have an inhibitory effect on S3 sludge fermentation, and overall Considering these factors, the parameters of Example 1 are preferable. Example 12: This example differs from Example 6 in the following respects: S4. Sludge fermentation: The internal temperature of the anaerobic digester 4 is adjusted to 36.8°C, and the third agitator 42 is stirred. Adjust the mixing speed to 100 rpm and ferment for 20 days. Example 13: This example differs from Example 6 in the following respects: S4. Sludge fermentation: The internal temperature of the anaerobic digester 4 is adjusted to 37.2°C, and the third agitator 42 is stirred. Adjust the mixing speed to 120 rpm and ferment for 25 days. Example 14: This example differs from Example 6 in the following respects: S5, Magnetic biochar recovery: The amount of water added is 3 times the weight of the sludge, and ultrasonic generator 69 ultrasonic Adjust the output power to 800W. Example 15: This example differs from Example 6 in the following respects: S5, Magnetic biochar recovery: The amount of water added is four times the weight of the sludge, and ultrasonic generator 69 ultrasonic Adjust the output power to 1200W.
[0008] Experimental Example 1: Regarding the apparatus and method of Example 6 of the present invention, the efficiency of organic carbon capture in wastewater and Investigate the removal rate of phosphates. 1. Subject of the experiment: The wastewater from a wastewater treatment plant in a certain city was used as the subject of the investigation, and the detection results showed that in this city wastewater... The total COD was 217 mg / L, the soluble COD was 77 mg / L, and the particulate COD was 217 mg / L. The concentration is 127 mg / L, and the phosphate concentration is 3.5 mg / L. 2. Test Method: Multiple sets of experiments (referred to as R1 to R3, respectively) were conducted according to the method of Example 6. The experiment was conducted as follows: R1 was a blank control group with no biochar added, while R2 was a group with coconut shell biochar. Only is added, and magnetic biochar is added to R3 (Example 6). The three experimental groups are synchronized. After 20 days of operation, the COD, organic carbon, and phosphate content in the wastewater is detected and removed. The rate of departure was calculated and is shown in Table 1 below: Table 1. Organic carbon scavenging efficiency and phosphate removal rate in wastewater in 3 sets of experiments. TIFF2026091203000002.tif42158 As can be seen from Table 1, the removal rate of phosphates in wastewater by adding magnetic biochar This significantly improves the adsorption of organic carbon and phosphorus in wastewater, resulting in stable and efficient carbon capture. • Ensure phosphorus removal effect. Experimental Example 2: Regarding the apparatus and method of Example 7 of the present invention, the efficiency of organic carbon capture in wastewater and Investigate the removal rate of phosphates. 1. Subject of the experiment: The wastewater from a wastewater treatment plant in a certain city was investigated, and the detection results showed that the total amount of wastewater in this city was The COD was 289 mg / L, the soluble COD was 105 mg / L, and the particulate COD was The concentration is 168 mg / L, and the phosphate concentration is 4.2 mg / L. 2. Test Method: Multiple sets of experiments (referred to as R1 to R3, respectively) were conducted according to the method of Example 7. The experiment was conducted as follows: R1 was a blank control group with no biochar added, while R2 was a group with coconut shell biochar. Only is added, and magnetic biochar is added to R3 (Example 7). The three experimental groups are synchronized. After 30 days of operation, the COD, organic carbon, and phosphate content in the wastewater is detected and removed. The rate of departure was calculated and is shown in Table 2 below: Table 2. Organic carbon scavenging efficiency and phosphate removal rate in wastewater in 3 sets of experiments. As can be seen from Table 2 of TIFF2026091203000003.tif36159, the same trend as in Experimental Example 1 is reflected in Experimental Example 2, and the present invention The setup and method effectively improve the efficiency of organic carbon capture in wastewater while simultaneously reducing phosphorus. It also has a good removal effect, a fast sludge settling rate, low energy and material consumption, and is stable. This enables highly efficient and low-energy-consuming wastewater carbon capture and phosphorus removal. It becomes clear that...
Claims
1. A wastewater tank (1) is provided with a first agitator (11) inside, An SBR reactor (2) is in communication with the wastewater tank (1), and the SBR reactor (2) is internal It is a hollow cylindrical warehouse body, and a drain pipe (21) is connected to the middle of the outer wall of the SBR reactor (2). The sludge discharge pipe (22) and aeration pipe (2) are located at the lower part of the outer wall of the SBR reactor (2). 3) is connected and extends from the top of the SBR reactor (2) to the bottom inside the SBR reactor (2) A second stirrer (24) is provided, and an electromagnet (25) is provided at the bottom of the SBR reactor (2). The wastewater tank (1) and the SBR reactor (2) are connected via a wastewater pipe (12). An SBR reactor (2) is provided with a wastewater pump (13) on the wastewater pipe (12), A denitrification reaction tank (3) is in communication with the aforementioned drain pipe (21), An anaerobic digester (4) that communicates with the sludge discharge pipe (22), and the anaerobic digester (4 A biogas discharge pipe (41) is provided at the top of the anaerobic digester (4), and a third An anaerobic digester (4) equipped with a stirrer (42), A dozer (5) is provided on one side of the top of the SBR reactor (2), A sludge removal device (6) is in communication with the anaerobic digester (4), and the sludge removal device (6) is made by Kuramoto The body (62) is included, and an ultrasonic generator (69) is provided inside the warehouse body (62), A first motor (63) is provided at the top of the warehouse body (62), and the output of the first motor (63) A rotating shaft (64) is connected to the axis, and a plurality of hydraulic telescopic rods are mounted on the side wall of the rotating shaft (64). (66) is provided, and a guide plate (67) is attached to the lower end of each hydraulic telescopic rod (66) The guide plate (67) is fixedly connected and has a two-layer structure, with the upper layer being made of austenitic material. It is a t-type stainless steel material, the lower layer is martensitic stainless steel, and each of the hydraulics The second motor (65) is connected to the top end of the telescopic rod (66), and the outer wall of the rotating shaft (64) Multiple stirring rods (642) are provided on top, and a reflux tank (61) is located on the side wall of the warehouse body (62). A scraper (612) is provided on the reflux tank (61) side, and the reflux tank (61) is a sludge removal device (6) connected to the dozer (5) via a recirculation pipe (51), A carbon capture and phosphorus removal device characterized by comprising the following features.
2. An air pump (26) is provided at the end of the aeration pipe (23), and discharged onto the drain pipe (21). A water pump (27) is provided, and a sludge discharge pump (28) is provided on the sludge discharge pipe (22). The carbon capture and phosphorus removal apparatus according to claim 1, characterized in that it can be used.
3. The electromagnet (25) has a disc-shaped structure, and the cross-sectional area of the electromagnet (25) is the SBR reactor The carbon capture according to claim 1, characterized in that the base area of (2) is 75 to 100%. • Phosphorus removal device.
4. The denitrification reactor (3) is a rectangular structure with a plurality of floating packing material assemblies (31) inside. It is a box-shaped body, and the floating packing material assembly (31) is a mesh box and the mesh The anaerobic digester (4) is made of polyethylene material filled inside the sieve box. The system includes a hollow cylindrical tank (44) and an insulating layer (43) that surrounds the outside of the tank (44). The carbon capture and phosphorus removal apparatus according to feature 1.
5. Multiple grooves (641) are provided on the side wall of the rotating shaft (64), and each of the hydraulic telescopic rods ( 66) are provided in pairs within each of the grooves (641), and the guide plate (67) is fan-shaped The structure is such that a fixing block (671) is provided inside the guide plate (67), and the The fixing block (671) is fixedly connected to the bottom of the hydraulic telescopic rod (66), The second motor (65) moves the hydraulic telescopic rod (66) in an extended and retracted manner, The fixed block (671) is slid up and down within the groove (641), and in synchronization with this, the front The guide plate (67) is driven to move up and down, and the side wall of the warehouse body (62) A slot (621) is provided at the top, and the reflux tank (61) is inside the slot (621) A slider (611) is provided at the bottom of the reflux tank (61), and the slider The dar (611) is slidable in the sliding groove (622) provided at the bottom of the slot (621). It is connected to the power supply and is located below the slot (621) in the side wall of the warehouse body (62) A hydraulic push rod (68) is provided at the position, and the output of the hydraulic push rod (68) The end is fixedly connected to the outside of the reflux tank (61), and the hydraulic push rod (68) The reflux tank (61) is driven to slide within the slot (621) via the above. The reflux tank (61) slides from the inside to the outside of the slot (621) all the way to the outermost part. The characteristic feature is that the reflux pipe (51) is located directly above the reflux tank (61). The carbon capture and phosphorus removal apparatus according to claim 1.
6. Both sides of the first motor (63) are fixed to the warehouse body (62) via fixing rods (631). The second motor (65) is fixedly connected, and there are three of the corresponding hydraulic telescopic rods ( 66) and the guide plate (67) are each three, characterized in that 5 The carbon capture and phosphorus removal device described above.
7. Carbon capture and phosphorus removal based on the carbon capture and phosphorus removal apparatus according to any one of claims 1 to 6 It is a method of leaving, S1. Water injection and agitation: Wastewater is injected into the wastewater tank (1) and uniformly agitated by the first agitator (11). The next step is to transport the wastewater to the SBR reactor (2) via the wastewater pipe (12), S2, SBR treatment: The operating modes of the SBR reactor (2) are contact stage, sedimentation stage, drainage stage and safety Including the stabilization stage, Contact stage: Magnetic biochar is introduced into the SBR reactor (2) by a dozer (5), and magnetic biochar is introduced. The amount of charcoal added is 100-500 mg / L, and after adding it, the second stirrer (24) is opened. Stirring is performed at a rotation speed of 100-150 rpm for 10-15 minutes. Settling stage: Close the second agitator (24), energize the electromagnet (25), and energize the electromagnet (25) This creates an electromagnetic field, and under the action of the electromagnetic field, the settling of magnetic biochar and sludge is promoted, and when electricity is applied... The interval is 10 to 30 minutes. Drainage stage: The drainage pump (27) is opened, and the wastewater in the SBR reactor (2) is drained through the drainage pipe (21). The wastewater that enters the denitrification reactor (3) is then transported to the denitrification reactor (3) After denitrification treatment, when the wastewater in the SBR reactor (2) is discharged to half its water level, the drainage pump Close (27), Stabilization stage: Open the air pump (26) and pass air through the aeration pipe (23) into the SBR reactor (2) The wastewater and sludge are aerated, and continuous aeration is performed for 40-50 minutes to achieve a dissolved oxygen concentration of 1.5-2 mg / L. The aeration is controlled to open the second agitator (24) and stir simultaneously, and the rotation of the second agitator (24) The speed is 60-150 rpm, and then the sludge discharge pump (28) is opened and the sludge discharge pipe ( 22) Discharge 1 / 4 to 1 / 3 of the sludge from the SBR reactor (2) to the anaerobic digester (4) Smooth steps, S3, Circulation: A step of repeating S1 and S2 to process the wastewater for the next batch, S4. Sludge fermentation: The internal temperature of the anaerobic digester (4) is adjusted to 37 ± 0.2°C, and the third agitator is used. The stirring speed of (42) is 100-120 rpm, and the remaining sludge is fermented for 20-25 days. The biogas inside the anaerobic digester (4) is collected via the biogas discharge pipe (41). Then, the remaining sludge is discharged into the sludge removal device (6), S5. Magnetic biochar recovery: The remaining sludge is passed through the warehouse body (62) of the desludge removal device (6), and the warehouse body Water is added to (62), and the amount of water added is 3 to 4 times the weight of the sludge, and inside the warehouse body (62) Open the ultrasonic generator (69) and set the ultrasonic output of the ultrasonic generator (69) to 800-1200W. Adjust to perform ultrasonic treatment, simultaneously open the first motor (63), and the first motor (63) Therefore, by rotating the rotating shaft (64), the magnetic biochar is guided onto the guide plate (67). It is attached to the lower surface and one of the second motors (65) is controlled every 5 minutes to extend the corresponding hydraulic pressure. The retractable rod (66) is extended and retracted to raise the guide plate (67) to the height of the recirculation tank (61). Move it to the rotating shaft (64) and rotate the guide plate (67), so the scraper (612) scrapes off the magnetic biochar adhering to the lower surface of the guide plate (67) and recirculates it. The magnetic biochar is dropped into the tank (61) and recovered in the reflux tank (61) into the reflux pipe (51). The step includes transporting to a dozer (5) via and reusing, The method for preparing the magnetic biochar is as follows: biomass raw material and stainless steel After mixing steel balls in a mass ratio of 1:100 and loading them into a stainless steel polishing tank for polishing, 2 The material is passed through a 00-mesh sieve to obtain biomass powder, and the diameter of the stainless steel balls is 3 mm. The biomass powder and magnetic powder are mixed in a mass ratio of 1:2 to 4 and then used in a planetary ball mill. Loaded into the ball mill, the planetary ball mill rotates at a speed of 300-400 rpm for 10 After operating for up to 12 hours, remove and wash three times alternately with ultrapure water and ethanol, then heat at 60-70°C. After drying, magnetic biochar is obtained. The aforementioned biomass raw material is one of the following: coconut shells, wood chips, or rice husk biochar. The magnetic powder is Fe ３ O ４ It is characterized by being a powder, with the diameter of the magnetic powder being less than 2 mm. A carbon capture and phosphorus removal method.