A treatment system and method for removing antibiotics from mariculture effluent

Abstract

The application discloses a treatment system and method for removing antibiotics in mariculture tail water, and the treatment system comprises a biofilm reactor, which comprises a reaction tank, an aeration system and an activation unit. A partition plate is arranged in the reaction tank, and the partition plate divides the reaction tank into a plurality of reaction zones. The activation unit is arranged in each reaction zone, and the aeration system outputs oxygen to each reaction zone. The activation unit comprises a cage frame, a cage net, a cage net stretching device and a vibration device. The cage net stretching device drives the cage net to move along the cage frame. The cage net can be wrapped outside the cage frame to form a vibration space capable of surrounding the filler in the cage frame. The vibration device is arranged in the cage frame, and is used for vibrating the filler in the vibration space. The mariculture tail water is subjected to hierarchical biological purification through the plurality of reaction zones. The filler is continuously vibrated and activated by the activation unit, so that the biological purification capacity of the filler is maintained, and the purification effect on the antibiotics is improved.

Description

Technical Field

[0001] This invention relates to the field of marine aquaculture wastewater treatment technology, and in particular to a treatment system and method for removing antibiotics from marine aquaculture wastewater. Background Technology

[0002] Marine aquaculture tailwater is wastewater generated during the marine aquaculture process, containing a large amount of nutrients and pollutants. Currently, conventional sedimentation, filtration, or simple biological treatment processes mainly target conventional pollutants such as organic matter, ammonia nitrogen, and suspended solids. Their ability to remove emerging pollutants like antibiotics—which are difficult to degrade, occur at low concentrations, and possess specific toxicity and potential risks—is very limited. Antibiotics can easily penetrate traditional treatment systems and be directly discharged into the environment, leading to ecological risks and food safety hazards.

[0003] In addition, in traditional biofilm or activated sludge purification methods, the biofilm on the packing material will become too thick, age, and clump together over time. This leads to low metabolic activity or even death of the inner microorganisms, resulting in a decrease in overall treatment efficiency and fluctuations in water quality.

[0004] Therefore, it is necessary to provide a marine aquaculture wastewater treatment system for antibiotic removal to solve the above-mentioned technical problems. Summary of the Invention

[0005] The present invention aims to at least solve one of the aforementioned technical problems existing in the prior art. To this end, this application proposes a treatment system for removing antibiotics from marine aquaculture wastewater, which can absorb antibiotics in marine aquaculture wastewater to meet discharge requirements, and can extend the working life of biofilm as much as possible and reduce water quality fluctuations.

[0006] This application also proposes a method based on the above-mentioned treatment system for removing antibiotics from marine aquaculture tailwater.

[0007] A treatment system for removing antibiotics from marine aquaculture tailwater according to a first aspect embodiment of this application includes: A biofilm reactor includes a reaction tank, an aeration system, and an activation unit. The reaction tank is used to hold packing material and is equipped with a partition plate that divides the reaction tank into several reaction zones. The activation unit is located in each of the reaction zones, and the aeration system outputs oxygen to each of the reaction zones. The activation unit includes a cage frame, a cage mesh, a cage mesh extension device, and a vibration device. The cage mesh extension device drives the cage mesh to move along the cage frame, and the cage mesh can cover the outside of the cage frame to form a vibration space within the cage frame that can surround the packing material. The vibration device is located inside the cage frame and is used to vibrate the packing material within the vibration space.

[0008] The treatment system for removing antibiotics from marine aquaculture tailwater according to the embodiments of this application has at least the following beneficial effects: by setting up several reaction zones to carry out graded biological purification of marine aquaculture tailwater, and by using an activation unit to continuously vibrate and activate the packing material, the biological purification capacity of the packing material is maintained, thereby improving the purification effect on antibiotics.

[0009] According to some embodiments of this application, the cage includes a central shaft, a base, a movable seat, and spring-loaded support rods. The base is installed at one end of the central shaft, the movable seat is slidably connected to the central shaft, and there are multiple spring-loaded support rods arranged in a circular array around the central shaft. The two ends of each spring-loaded support rod are respectively connected to the base and the movable seat. The proximity of the movable seat and the base can drive the spring-loaded support rods to arch outward, and the cage mesh covers the outside of each spring-loaded support rod.

[0010] According to some embodiments of this application, the activation unit further includes a telescopic drive device that drives the movable seat to move along the central axis.

[0011] According to some embodiments of this application, the cage extension device includes a threaded sleeve, a pull rope, and a first motor. The side of the central shaft is provided with threads. The threaded sleeve is sleeved on the central shaft and threadedly connected to it. The two ends of the pull rope are respectively connected to the threaded sleeve and the cage. The rotating shaft of the first motor is fixedly connected to the central shaft.

[0012] According to some embodiments of this application, the vibration device includes a crankshaft and a second motor, the second motor driving the crankshaft to rotate in the vibration space.

[0013] According to some embodiments of this application, the vibration device further includes a rotating shaft sleeve and a side shaft. The rotating shaft sleeve is rotatably connected to the central shaft. The second motor drives the rotating shaft sleeve to rotate. A gear disk is installed on the rotating shaft sleeve. The end of the side shaft is provided with a gear that can mesh with the gear disk. The side shaft is connected to the crankshaft.

[0014] According to some embodiments of this application, the reaction zone includes a first reaction zone, a second reaction zone, and a third reaction zone arranged sequentially along a first direction. The first reaction zone is used to hold magnetic filler, the second reaction zone is used to hold conductive filler, and the third reaction zone is used to hold hydrophilic filler.

[0015] According to some embodiments of this application, the aeration system includes a connecting pipe and an aeration pipe, one end of the connecting pipe is connected to the aeration pipe, the other end of the connecting pipe is connected to an air supply device, and the aeration pipe is disposed at the bottom of the reaction tank.

[0016] According to some embodiments of this application, the aeration system further includes a water collection tray and a drain pipe. The partition plate has a flow guiding channel inside, and the side of the partition plate has a plurality of flow holes communicating with the flow guiding channel. The water collection tray is located at the bottom of the reaction tank and has a plurality of water guiding holes. The two ends of the drain pipe are respectively connected to the flow guiding channel and the water guiding holes. A suction pump is installed on the drain pipe, and the suction pump drives water to flow into the flow guiding channel and discharge from the flow holes.

[0017] The method for removing antibiotics from marine aquaculture wastewater according to a second aspect embodiment of this application, which is based on the above-described treatment system for removing antibiotics from marine aquaculture wastewater, includes the following steps: The wastewater from the marine aquaculture pond enters the discharge pond for preliminary filtration treatment; The effluent discharged from the discharge pool enters the sedimentation tank for sedimentation to remove suspended solids; The effluent discharged from the sedimentation tank enters the reaction tank for biological reaction, and the aeration system continuously supplies oxygen to the reaction tank. The activation unit repeatedly activates the packing material in the reaction tank; The effluent discharged from the reaction tank enters the oxidation tank to decompose residual antibiotics and intermediate products. The effluent discharged from the oxidation tank enters the activated carbon adsorption tank for further retention of antibiotic molecules. The activation process of the filler by the activation unit includes: The cage extension device drives the cage to move along the cage frame, forming a vibration space within the cage frame that can surround the filling material. The vibration device is activated to vibrate the packing material in the vibration space, thereby peeling off the aged and hardened biofilm on the surface of the packing material. The cage extension device drives the cage to retract, releasing the packing material in the vibration space outward.

[0018] The method for removing antibiotics from marine aquaculture tailwater according to the embodiments of this application has at least the following beneficial effects: by filtering, settling, biologically activating and decomposing antibiotics in marine aquaculture tailwater, antibiotics are deeply treated, which can remove most of the pollutants and ensure the safety of the effluent.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The accompanying drawings are used to provide a further understanding of the technical solutions disclosed in this application and form part of the specification. They are used together with the embodiments disclosed in this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions disclosed in this application.

[0021] Figure 1 This is a schematic diagram of the structure of the biofilm reactor in the treatment system for removing antibiotics from marine aquaculture tailwater according to the first aspect of this application; Figure 2 This is a schematic diagram of the aeration system of the biofilm reactor in the treatment system for removing antibiotics from marine aquaculture tailwater according to the first aspect of this application. Figure 3 This is a schematic diagram of the structure of the partition plate in the treatment system for removing antibiotics from marine aquaculture tailwater according to the first aspect of this application; Figure 4 This is a schematic diagram of the layout of multiple activation units in the treatment system for removing antibiotics from marine aquaculture tailwater according to the first aspect of this application. Figure 5 This is a schematic diagram of the structure of the activation unit expanding outward in the treatment system for removing antibiotics from marine aquaculture tailwater according to the first aspect of this application; Figure 6 This is a schematic diagram of the structure of the activation unit during contraction in the treatment system for removing antibiotics from marine aquaculture tailwater according to the first aspect of this application; Figure 7 This is a schematic diagram of the telescopic drive device in the treatment system for removing antibiotics from marine aquaculture tailwater according to the first aspect of this application. Figure 8 This is a schematic diagram of the structure of the vibration device in the treatment system for removing antibiotics from marine aquaculture tailwater according to the first aspect of this application; Figure 9 This is a schematic diagram showing the connection of various reaction devices in the treatment system for removing antibiotics from marine aquaculture tailwater according to the first aspect of this application.

[0022] Figure reference numerals: 100-Biofilm reactor, 110-Reaction tank, 111-Baffle plate, 1111-Flow guide channel, 1112-Flow hole, 1113-Flow guide hood, 120-Aeration system, 121-Connecting pipe, 122-Aeration pipe, 123-Water collection tray, 124-Drainage pipe, 125-Suction pump, 130-Activation unit, 131-Cage frame, 1311-Central shaft, 1312-Base, 1313-Modible seat, 1314-Spring support rod, 132-Cage net, 133-Cage net extension device, 133 1-Threaded sleeve, 1332-Pull rope, 134-Vibration device, 1341-Crankshaft, 1342-Rotating shaft sleeve, 1343-Side shaft, 135-Telescopic drive device, 141-First reaction zone, 142-Second reaction zone, 143-Third reaction zone, 150-Overflow structure, 151-Filter cartridge, 152-Overflow chamber, 153-Drainage chamber, 154-Baffle plate, 155-Drainage pipe, 200-Discharge pool, 210-Grate unit, 300-Sedimentation tank, 400-Oxidation tank, 500-Activated carbon adsorption tank. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

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

[0025] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0027] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] Marine aquaculture tailwater is wastewater generated during the marine aquaculture process, containing a large amount of nutrients and pollutants. Currently, conventional sedimentation, filtration, or simple biological treatment processes mainly target conventional pollutants such as organic matter, ammonia nitrogen, and suspended solids. Their ability to remove emerging pollutants like antibiotics—which are difficult to degrade, occur at low concentrations, and possess specific toxicity and potential risks—is very limited. Antibiotics can easily penetrate traditional treatment systems and be directly discharged into the environment, leading to ecological risks and food safety hazards.

[0029] In addition, in traditional biofilm or activated sludge purification methods, the biofilm on the packing material will become too thick, age, and clump together over time. This leads to low metabolic activity or even death of the inner microorganisms, resulting in a decrease in overall treatment efficiency and fluctuations in water quality.

[0030] Therefore, it is necessary to provide a marine aquaculture wastewater treatment system for antibiotic removal to solve the above-mentioned technical problems.

[0031] In response, this application proposes a treatment system for removing antibiotics from marine aquaculture wastewater. The system uses several reaction zones to perform graded biological purification of the wastewater and utilizes an activation unit to continuously vibrate and activate the packing material, thereby maintaining the packing material's biological purification capacity and improving the purification effect on antibiotics.

[0032] In addition, this application also proposes a method for treating marine aquaculture wastewater for antibiotic removal, which is based on the above-mentioned marine aquaculture wastewater treatment system for antibiotic removal. Through filtration, sedimentation, biological activation and antibiotic decomposition of marine aquaculture wastewater, antibiotics are deeply treated, which can remove most of the pollutants and ensure the safety of the effluent.

[0033] Reference Figure 1 The treatment system for removing antibiotics from marine aquaculture tailwater in the first aspect of this application includes a biofilm reactor 100, which reduces the antibiotic content in the tailwater by reacting microorganisms with antibiotics in the marine aquaculture tailwater, so that the tailwater meets the final discharge standards.

[0034] Specifically, the biofilm reactor 100 includes a reaction tank 110, an aeration system 120, and an activation unit 130. The reaction tank 110 is used to hold the packing material, providing space for the microorganisms in the packing material to react with antibiotics. A partition plate 111 is provided inside the reaction tank 110, which divides the reaction tank 110 into several reaction zones. The activation unit 130 is set in each reaction zone, thereby allowing the effluent to undergo a step-by-step reaction through each reaction zone.

[0035] Furthermore, the reaction zone includes the region along the first direction (refer to...). Figure 1 The reaction zone comprises a first reaction zone 141, a second reaction zone 142, and a third reaction zone 143 arranged sequentially in the x-direction. The first reaction zone 141 holds magnetic filler material with large pore size, high strength, and embedded magnetic cores, capable of adsorbing colloids and organic particles. Rapid adsorption on the filler surface mitigates the immediate impact of salinity and antibiotics on subsequent organisms. The second reaction zone 142 holds conductive filler material, which acts as an electrode, generating strong oxidizing substances under a micro-electric field to attack antibiotic molecules, enhancing the co-metabolic ability of microorganisms against recalcitrant antibiotics; moreover, electrochemical action can directly destroy the structure of antibiotic molecules. The third reaction zone 143 holds hydrophilic filler material with extremely high specific surface area and a hydrophilic coating, trapping detached microbial membrane fragments to form a dense biofilm, achieving deep treatment.

[0036] Furthermore, to prevent the packing material from leaving the reaction tank 110 with the effluent, an overflow structure 150 is provided downstream of the reaction tank 110. This structure includes a filter cartridge 151, an overflow chamber 152, a drainage chamber 153, a baffle 154, and a drain pipe 155. A baffle is provided between the overflow chamber 152 and each reaction zone, and the filter cartridge 151 is mounted on this baffle. The filter cartridge 151 has a mesh structure to filter the packing material in the effluent, allowing only the effluent to pass through the filter cartridge 151 and enter the overflow chamber 152. The baffle 154 is located between the overflow chamber 152 and the drainage chamber 153. As the water level in the overflow chamber 152 rises, the effluent can overflow over the top of the baffle 154 into the drainage chamber 153, where settled solid impurities are trapped. The drain pipe 155 is installed in the drainage chamber 153 to discharge the effluent from the drainage chamber 153.

[0037] The aeration system 120 supplies oxygen to each reaction zone, providing the necessary oxygen for the microorganisms. (Refer to...) Figure 2In this embodiment, the aeration system 120 includes a connecting pipe 121 and an aeration pipe 122. One end of the connecting pipe 121 is connected to the aeration pipe 122, and the other end of the connecting pipe 121 is connected to an air supply device. The aeration pipe 122 is located at the bottom of the reaction tank 110. Thus, when the air supply device is started, oxygen is input through the connecting pipe 121 to the aeration pipe 122, and the aeration pipe 122 then inputs the oxygen to the bottom of the reaction tank 110. Bubbles move upwards from the bottom of the reaction tank 110, allowing the microorganisms in the reaction tank 110 to fully contact the bubbles to obtain oxygen. Furthermore, the upward-moving bubbles also agitate the effluent, loosening the biofilm that has hardened on the surface of the packing material to expose the internal microorganisms.

[0038] Optionally, the aeration system 120 may also include a water collection tray 123 and a drain pipe 124. (See reference...) Figure 3 The partition plate 111 has a flow channel 1111 inside, and multiple flow holes 1112 connecting the flow channel 1111 are opened on the side of the partition plate 111. The water collection tray 123 is set at the bottom of the reaction tank 110, and the water collection tray 123 has multiple water guide holes. The two ends of the drain pipe 124 are connected to the flow channel 1111 and the water guide holes respectively. A suction pump 125 is installed on the drain pipe 124. The suction pump 125 drives the water to flow into the flow channel 1111 and out through the flow holes 1112. Thus, when the suction pump 125 is started, it can generate suction so that the tailwater at the bottom of the reaction tank 110 flows through the water collection tray 123, the drain pipe 124, and the flow channel 1111 in sequence and flows out again through the flow holes 1112 to the middle or upper part of the reaction tank 110, so that there is a circulating water flow in the reaction tank 110. By increasing the flow rate of the water, the effluent is made to fully contact the packing material to complete the purification of the antibiotics.

[0039] Furthermore, a flow guide shroud 1113 is provided on the side of the partition plate 111 to protect the flow hole 1112. The outer surface of the flow guide shroud 1113 is streamlined to allow the surrounding water to flow smoothly.

[0040] The number of activation units 130 can be increased or decreased according to actual needs, referring to... Figure 4 Each activation unit 130 is fixed to the fixed frame in an array. (Refer to...) Figures 4 to 8The activation unit 130 includes a cage frame 131, a cage mesh 132, a cage mesh extension device 133, and a vibration device 134. The cage mesh extension device 133 drives the cage mesh 132 to move along the cage frame 131 to adjust the coverage area of ​​the cage mesh 132 on the cage frame 131. The cage mesh 132 can cover the outside of the cage frame 131 to form a vibration space within the cage frame 131 that can enclose the packing material. The vibration device 134 is disposed inside the cage frame 131 and is used to vibrate the packing material within the vibration space, thereby removing the aged and hardened biofilm on the surface of the packing material and exposing the internal packing material for continued biological reactions against antibiotics.

[0041] Specifically, refer to Figure 5 The cage frame 131 includes a central shaft 1311, a base 1312, a movable seat 1313, and spring-loaded support rods 1314. The base 1312 is mounted on one end of the central shaft 1311. The movable seat 1313 is slidably connected to the central shaft 1311. Multiple spring-loaded support rods 1314 are arranged in a circular array around the central shaft 1311. The two ends of each spring-loaded support rod 1314 are connected to the base 1312 and the movable seat 1313, respectively. The proximity of the movable seat 1313 and the base 1312 causes the spring-loaded support rods 1314 to arch outwards. A cage mesh 132 covers the outside of each spring-loaded support rod 1314.

[0042] Therefore, when the movable seat 1313 approaches the base 1312, reference Figure 5 The spring strut 1314 arches outward, expanding the cage frame 131 and increasing the vibration space inside, allowing more packing material to enter. When the movable seat 1313 moves away from the base 1312, the cage frame 131 contracts, reducing the vibration space inside, causing the packing material within the vibration space to move closer together, thus enhancing the vibration effect of the vibration device 134. By repeatedly controlling the movement of the movable seat 1313, the activation unit 130 can continuously absorb the packing material and vibrate it to break down the biofilm, thereby restoring the activity of the packing material.

[0043] Furthermore, referring to Figure 7 The activation unit 130 also includes a telescopic drive device 135, which drives the movable seat 1313 to move along the central axis 1311. Specifically, the telescopic drive device 135 can be a linear drive motor, a pneumatic telescopic rod, a hydraulic telescopic rod, a motor-screw mechanism, or a motor-rack and pinion mechanism to output translational force.

[0044] Furthermore, referring to Figure 8The cage extension device 133 includes a threaded sleeve 1331, a pull rope 1332, and a first motor. The side of the central shaft 1311 is threaded. The threaded sleeve 1331 is fitted onto and threadedly connected to the central shaft 1311. The two ends of the pull rope 1332 are connected to the threaded sleeve 1331 and the cage 132, respectively. The shaft of the first motor is fixedly connected to the central shaft 1311. Thus, when the first motor starts, the central shaft 1311 rotates to drive the threaded sleeve 1331 to move along the central shaft 1311. During the movement of the threaded sleeve 1331, it applies tension to the cage 132 through the pull rope 1332, causing it to move on the spring support rod 1314, thereby controlling the coverage area of ​​the cage 132 on the cage frame 131.

[0045] When vibration of the packing material is required, the movable seat 1313 first moves closer to the base 1312 to expand the spring support rod 1314. Then, the first motor starts to drive the cage mesh 132 to move along the spring support rod 1314, enclosing the packing material in the vibration space formed by the cage mesh 132. Subsequently, the movable seat 1313 moves away from the base 1312 to retract the spring support rod 1314, and the vibration device 134 is activated to vibrate. When it is necessary to release the vibrated packing material, the first motor starts to drive the cage mesh 132 to move along the spring support rod 1314, releasing the packing material in the vibration space. Repeating the above operation completes the collection-vibration-release process of the packing material.

[0046] The vibration device 134 includes a crankshaft 1341 and a second motor. The second motor drives the crankshaft 1341 to rotate in the vibration space. The tailwater is agitated by an eccentric block protruding outward on the crankshaft 1341.

[0047] Furthermore, the number of crankshafts 1341 can be set to two or more to improve vibration efficiency. For two or more crankshafts 1341, in some embodiments, the number of second motors is the same as the number of crankshafts 1341, with each motor driving its corresponding crankshaft 1341. In other embodiments, the second motors achieve synchronous driving of two or more crankshafts 1341 through a transmission mechanism. In this embodiment, the vibration device 134 also includes a rotating shaft sleeve 1342 and a side shaft 1343. The rotating shaft sleeve 1342 is rotatably connected to the central shaft 1311. The second motor drives the rotating shaft sleeve 1342 to rotate. A gear disk is mounted on the rotating shaft sleeve 1342, and the end of the side shaft 1343 is provided with a gear capable of meshing with the gear disk. The side shaft 1343 is connected to the crankshaft 1341. Thus, the gear on the side shaft 1343 and the gear disk on the rotating shaft sleeve 1342 form a planetary gear mechanism. By rotating the rotating shaft sleeve 1342, each crankshaft 1341 can be driven to rotate synchronously.

[0048] Reference Figure 9This treatment system for removing antibiotics from marine aquaculture wastewater also includes a discharge tank 200, a sedimentation tank 300, an oxidation tank 400, and an activated carbon adsorption tank 500. The discharge tank 200 receives wastewater directly discharged from the marine aquaculture ponds, and uses a screen unit 210 to perform preliminary filtration, removing large particles, uneaten feed, and feces. The sedimentation tank 300 receives the treated wastewater from the discharge tank 200, performing preliminary sedimentation to remove suspended solids from the wastewater surface. The oxidation tank 400 receives wastewater discharged from the biofilm reactor 100, using advanced oxidation technology (such as ozone) to powerfully decompose antibiotic residues and intermediate products that are difficult for biological processes, ensuring safe effluent. The activated carbon adsorption tank 500 receives wastewater discharged from the oxidation tank 400, and can be equipped with a membrane separation device for further efficient retention of antibiotic molecules, or can use ultraviolet light, ozone, or low-dose chlorine disinfection to kill pathogens.

[0049] The method for removing antibiotics from marine aquaculture wastewater according to the second aspect of this application is based on the above-mentioned treatment system for removing antibiotics from marine aquaculture wastewater, and includes the following steps: S100. The effluent from the marine aquaculture pond enters the discharge pond 200 for preliminary filtration treatment; S200. The effluent discharged from the discharge tank 200 enters the sedimentation tank 300 for sedimentation to remove suspended solids; S300. The effluent discharged from the sedimentation tank 300 enters the reaction tank 110 for biological reaction, and the aeration system 120 continuously supplies oxygen to the reaction tank 110. S400. Activation unit 130 repeatedly activates the packing material in reaction tank 110; S500. The effluent discharged from reaction tank 110 enters oxidation tank 400 to decompose residual antibiotics and intermediate products; The effluent discharged from the S600 oxidation tank 400 enters the activated carbon adsorption tank 500 to further trap antibiotic molecules.

[0050] The activation process of the packing material by the activation unit 130 includes: S410. The cage extension device 133 drives the cage 132 to move along the cage frame 131, forming a vibration space within the cage frame 131 that can enclose the filling material. S420. Vibration device 134 is started to vibrate the packing material in the vibration space and peel off the aged and hardened biofilm on the surface of the packing material; S430. The cage extension device 133 drives the cage 132 to retract, releasing the packing material in the vibration space outward.

[0051] The activation process of the packing material in the activation unit 130 is repeated to uniformly activate the packing material in the reaction tank 110.

[0052] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A treatment system for removing antibiotics from marine aquaculture wastewater, characterized in that, include: A biofilm reactor includes a reaction tank, an aeration system, and an activation unit. The reaction tank is used to hold packing material and is equipped with a partition plate that divides the reaction tank into several reaction zones. The activation unit is located in each of the reaction zones, and the aeration system outputs oxygen to each of the reaction zones. The activation unit includes a cage frame, a cage mesh, a cage mesh extension device, and a vibration device. The cage mesh extension device drives the cage mesh to move along the cage frame, and the cage mesh can cover the outside of the cage frame to form a vibration space within the cage frame that can surround the packing material. The vibration device is located inside the cage frame and is used to vibrate the packing material within the vibration space.

2. The treatment system for removing antibiotics from marine aquaculture wastewater according to claim 1, characterized in that: The cage frame includes a central shaft, a base, a movable seat, and spring-loaded support rods. The base is installed at one end of the central shaft, and the movable seat is slidably connected to the central shaft. There are multiple spring-loaded support rods arranged in a circular array around the central shaft. The two ends of each spring-loaded support rod are connected to the base and the movable seat, respectively. The proximity of the movable seat and the base can drive the spring-loaded support rods to arch outward. The cage mesh covers the outside of each spring-loaded support rod.

3. The treatment system for removing antibiotics from marine aquaculture wastewater according to claim 2, characterized in that: The activation unit further includes a telescopic drive device that drives the movable seat to move along the central axis.

4. The treatment system for removing antibiotics from marine aquaculture tailwater according to claim 2, characterized in that: The cage extension device includes a threaded sleeve, a pull rope, and a first motor. The side of the central shaft is provided with threads. The threaded sleeve is fitted onto the central shaft and threadedly connected to it. The two ends of the pull rope are respectively connected to the threaded sleeve and the cage. The shaft of the first motor is fixedly connected to the central shaft.

5. The treatment system for removing antibiotics from marine aquaculture tailwater according to claim 2, characterized in that: The vibration device includes a crankshaft and a second motor, the second motor driving the crankshaft to rotate in the vibration space.

6. The treatment system for removing antibiotics from marine aquaculture tailwater according to claim 5, characterized in that: The vibration device further includes a rotating shaft sleeve and a side shaft. The rotating shaft sleeve is rotatably connected to the central shaft. The second motor drives the rotating shaft sleeve to rotate. A gear disk is installed on the rotating shaft sleeve. The end of the side shaft is provided with a gear that can mesh with the gear disk. The side shaft is connected to the crankshaft.

7. The treatment system for removing antibiotics from marine aquaculture tailwater according to claim 1, characterized in that: The reaction zone includes a first reaction zone, a second reaction zone, and a third reaction zone arranged sequentially along a first direction. The first reaction zone is used to hold magnetic filler, the second reaction zone is used to hold conductive filler, and the third reaction zone is used to hold hydrophilic filler.

8. The treatment system for removing antibiotics from marine aquaculture tailwater according to claim 1, characterized in that: The aeration system includes a connecting pipe and an aeration pipe. One end of the connecting pipe is connected to the aeration pipe, and the other end of the connecting pipe is connected to an air supply device. The aeration pipe is located at the bottom of the reaction tank.

9. The treatment system for removing antibiotics from marine aquaculture tailwater according to claim 8, characterized in that: The aeration system also includes a water collection tray and a drain pipe. The partition plate has a flow channel inside, and the side of the partition plate has multiple flow holes that connect to the flow channel. The water collection tray is located at the bottom of the reaction tank and has multiple water guide holes. The two ends of the drain pipe are connected to the flow channel and the water guide holes, respectively. A suction pump is installed on the drain pipe, and the suction pump drives water to flow into the flow channel and out of the flow holes.

10. A method for removing antibiotics from marine aquaculture wastewater, wherein the method is based on the treatment system for removing antibiotics from marine aquaculture wastewater as described in any one of claims 1 to 9, characterized in that, include: The wastewater from the marine aquaculture pond enters the discharge pond for preliminary filtration treatment; The effluent discharged from the discharge pool enters the sedimentation tank for sedimentation to remove suspended solids; The effluent discharged from the sedimentation tank enters the reaction tank for biological reaction, and the aeration system continuously supplies oxygen to the reaction tank. The activation unit repeatedly activates the packing material in the reaction tank; The effluent discharged from the reaction tank enters the oxidation tank to decompose residual antibiotics and intermediate products. The effluent discharged from the oxidation tank enters the activated carbon adsorption tank for further retention of antibiotic molecules. The activation process of the filler by the activation unit includes: The cage extension device drives the cage to move along the cage frame, forming a vibration space within the cage frame that can surround the filling material. The vibration device is activated to vibrate the packing material in the vibration space, thereby peeling off the aged and hardened biofilm on the surface of the packing material. The cage extension device drives the cage to retract, releasing the packing material in the vibration space outward.

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