Floating aquaculture water body nutrient salt and organic new pollutant grading and cooperative purification equipment

Abstract

The application discloses a kind of floating type aquaculture water body nutrient salt and organic new pollutant grading collaborative purification equipment, including floating carrier, processing cabin, water inlet unit, power supply unit and controller, processing cabin includes the pretreatment cabin, biological treatment cabin, electrochemical treatment cabin and safety adjustment cabin sequentially arranged along water flow direction, two adjacent cabins are communicated by flow guide structure, flow guide structure guides water body unidirectionally, and isolation structure is also provided between two adjacent cabins to prevent water body from backflow or cross-cabin bypass;When the water quality safety sensor detection value of safety adjustment cabin meets the safety condition, the controller controls the switch valve and qualified water outlet of safety adjustment cabin to be conducted, when the detection value does not meet the safety condition, control switch valve and reflux channel are conducted;The controller adjusts the operating state of water inlet unit, backwashing component, aeration component, electric flocculation electrode pair and electrochemical oxidation electrode pair according to the clogging state of pretreatment cabin and the available electric energy of power supply unit.

Description

Technical Field

[0001] This invention relates to aquaculture water purification equipment, belonging to the field of in-situ water purification technology for aquaculture, and particularly to a floating aquaculture water nutrient salt and organic new pollutant graded synergistic purification equipment. Background Technology

[0002] Uneaten feed, excrement, and algal residues in open-air aquaculture water bodies may cause the accumulation of ammonia nitrogen, total nitrogen, and total phosphorus. Aquaculture inputs, surrounding agricultural runoff, and domestic sources may also introduce low-concentration new organic pollutants such as antibiotics, other veterinary drugs, hormones, pesticides, and personal care product ingredients. Nutrients and new organic pollutants differ in terms of pollution properties, removal mechanisms, and required reaction conditions, making it difficult for a single treatment unit to address them all.

[0003] To simultaneously reduce nutrients and new organic pollutants in aquaculture water, units such as filtration, biological denitrification, electrocoagulation for phosphorus removal, and electrochemical oxidation are typically connected in series or parallel and installed on a floating platform. However, aquaculture water is characterized by high suspended solids load, large fluctuations in pollution load, high requirements for direct return to the pond, and significant fluctuations in on-site power supply. In existing simple series or parallel connection methods, each unit is connected only by pipelines, and the direction and path of water flow are determined by the pipeline layout. Water can directly enter the electrochemical unit through the pipeline without undergoing biological de-loading. Filtered residues and electrochemically oxidized effluent are directly returned to the pond, and the influent volume and power supply status are independent of each other. This allows filtered solids to re-enter the aquaculture water, untreated water to be discharged via a bypass, residual oxidizing substances to be directly returned to the pond, and non-target organic matter and particles to consume electrical energy and electrodes. This problem is particularly prominent when the filtration unit is clogged, the electrochemical unit is shut down, or the pipeline is bypassed. Therefore, the long-term operational stability of the synergistic purification is poor.

[0004] Chinese patent application No. 202511250401.7, filed on September 3, 2025, discloses a treatment device and method for the synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants in aquaculture wastewater. The device includes a main unit comprising a treatment tank and an inlet pipe fixedly connected to one side of the treatment tank. Through the treatment tank in the main unit, in conjunction with a composite biofilm component, aerobic nitrification, anoxic denitrification, anaerobic phosphorus release, and aerobic excess phosphorus absorption processes can be completed within a single tank, effectively removing traditional pollutants such as carbon, nitrogen, and phosphorus. Simultaneously, an aeration catalytic unit, through an aeration head and a first manifold, combined with a catalytic oxidation packing layer and a polypropylene layer, constitutes a photocatalytic ozone oxidation system. While this patent can effectively remove new pollutants such as antibiotics and improve ozone utilization, it still has the following drawbacks:

[0005] The design directly discharges the water effluent from photocatalytic ozone oxidation, and the photocatalytic ozone oxidation stage is susceptible to suspended solids and biological adhesion, resulting in poor long-term operational stability of the synergistic purification process.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this patent application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to overcome the defects and problems of poor long-term operational stability of synergistic purification in the existing technology, and to provide a floating aquaculture water body tiered synergistic purification equipment with better long-term operational stability of synergistic purification.

[0008] To achieve the above objectives, the technical solution of the present invention is:

[0009] This invention provides a floating aquaculture water body nutrient salt and organic new pollutant graded and synergistic purification equipment, the equipment including a floating carrier, a treatment chamber, a water inlet unit, a power supply unit and a controller;

[0010] The floating support includes a buoyancy assembly for supporting the processing chamber;

[0011] The treatment chamber includes a pretreatment chamber, a biological treatment chamber, an electrochemical treatment chamber, and a safety regulation chamber arranged sequentially along the water flow direction; adjacent chambers are connected by a flow guiding structure, which is used to guide the water to flow in one direction; an isolation structure is also provided between adjacent chambers to prevent backflow or cross-chamber bypass.

[0012] The pretreatment chamber includes a coarse interceptor and a self-cleaning microporous filter arranged sequentially along the water flow direction; the self-cleaning microporous filter is provided with a backwashing assembly on the clean water side; the sewage discharge side of the backwashing assembly is connected to the backwash solid collection chamber, and the backwash solid collection chamber is isolated from the water flow path formed by the flow guiding structure.

[0013] The biological treatment chamber includes an aeration assembly and a biofilm carrier, with the biofilm carrier positioned above the aeration assembly; the electrochemical treatment chamber includes an electrocoagulation electrode pair and an electrochemical oxidation electrode pair arranged sequentially along the water flow direction.

[0014] The safety regulating chamber includes a water quality safety sensor, a qualified water outlet, a switching valve, and a reflux channel; the switching valve is connected to the qualified water outlet and the reflux channel respectively; the reflux channel is selectively connected to the inlet side of the pretreatment chamber or the inlet of the biological treatment chamber through a reflux control component; the reflux control component is used to provide reflux power and prevent backflow.

[0015] The water inlet unit includes an inlet end and an outlet end. The inlet end is located in the water intake area of ​​the aquaculture water body to be treated. The outlet end is connected to the pretreatment chamber.

[0016] The power supply unit is used to supply power to the equipment;

[0017] The controller is electrically connected to the water quality safety sensor and the switching valve respectively. When the detection value of the water quality safety sensor meets the safety conditions, the controller controls the switching valve to connect with the qualified water outlet; when the detection value of the water quality safety sensor does not meet the safety conditions, the controller controls the switching valve to connect with the return channel; the controller adjusts the operating status of the water inlet unit, backwash component, aeration component, electrocoagulation electrode pair, and electrochemical oxidation electrode pair according to the blockage status of the pretreatment chamber and the available power energy of the power supply unit.

[0018] The controller determines the clogging status of the pretreatment chamber based on the pressure difference or liquid level difference between the upstream and downstream of the self-cleaning microporous filter.

[0019] When the pressure difference or liquid level difference exceeds the clogging threshold, the controller reduces or stops the water inlet flow of the water inlet unit and starts the backwashing assembly to backwash the self-cleaning microporous filter.

[0020] After backwashing is completed, the controller rereads the pressure difference or liquid level difference. When the pressure difference or liquid level difference returns to below the reset threshold, the controller controls the water inlet unit to resume water intake; otherwise, the controller controls the equipment to remain shut down and outputs a maintenance prompt.

[0021] The controller performs at least the following three levels of load scheduling based on the available power energy of the power supply unit:

[0022] When the available electrical energy of the power supply unit is not higher than the first threshold, the controller controls the electrochemical oxidation electrode pair to stop operating and controls the water inlet unit, backwashing component and aeration component to operate intermittently.

[0023] When the available electrical energy of the power supply unit is higher than the first threshold and not higher than the second threshold, the controller controls the water inlet unit, backwashing component and aeration component to operate continuously, and selectively operates the electrocoagulation electrode pair.

[0024] When the available electrical energy of the power supply unit is higher than the second threshold, the controller controls the water inlet unit, aeration components, electrocoagulation electrode pair and electrochemical oxidation electrode pair to operate continuously according to the set treatment flow rate.

[0025] The second threshold is higher than the first threshold.

[0026] The equipment also includes a buffer chamber, which is disposed between the biological treatment chamber and the electrochemical treatment chamber.

[0027] When the electrochemical treatment chamber stops operating, the controller controls the water inlet unit to reduce the water inlet flow rate, and controls the water inlet unit to stop water intake when the liquid level in the buffer chamber reaches the upper limit.

[0028] The safety regulating chamber is equipped with a first detection position, a residual oxidant reduction component and a second detection position in sequence along the water flow direction.

[0029] The switching valve is located at the end of the safety regulating chamber, and the qualified water outlet and the return channel are respectively connected to the water outlet side of the switching valve;

[0030] The water quality safety sensor is installed at the first detection position and the second detection position.

[0031] The water quality safety sensor is any one or any combination of total residual chlorine sensor, free residual chlorine sensor, oxidation-reduction potential sensor, pH sensor, and conductivity sensor;

[0032] The residual oxidant reduction component is any one or any combination of activated carbon, reducing filter media, catalytic decomposition materials, and aeration removal components.

[0033] The biological treatment chamber also includes a flow guide baffle, which divides the biological treatment chamber into an aeration zone and a low-oxygen zone.

[0034] The biofilm carrier is distributed in the aeration zone and the low-oxygen zone; the aeration component is located at the bottom of the aeration zone and operates intermittently.

[0035] The electrochemical treatment chamber also includes floc interception components and sludge discharge channels;

[0036] The floc interceptor is located between the electrocoagulation electrode pair and the electrochemical oxidation electrode pair, and the sludge discharge channel is connected to the backwash solid collection chamber or a separately set sludge discharge container.

[0037] The backwash solids collection chamber includes a one-way inlet, a removable solids collection basket, and a return filter port;

[0038] The one-way inlet only allows backwash fluid to enter; the return filter port is located downstream of the removable solids collection basket and is connected to the water inlet side of the pretreatment chamber.

[0039] The power supply unit includes a power management component, a photovoltaic power generation component, an energy storage component, and a shore power interface;

[0040] The photovoltaic power generation module, energy storage module, and shore power interface are electrically connected to the power management module, which supplies power to the water inlet unit, backwash module, aeration module, electrocoagulation electrode pair, electrochemical oxidation electrode pair, switching valve, reflux control module, and controller.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] 1. This invention relates to a floating aquaculture water nutrient and organic pollutant graded synergistic purification equipment, comprising a floating carrier, a treatment chamber, an inlet unit, a power supply unit, and a controller. The treatment chamber includes a pretreatment chamber, a biological treatment chamber, an electrochemical treatment chamber, and a safety regulating chamber arranged sequentially along the water flow direction. Adjacent chambers are connected by a flow guide structure to guide water unidirectionally. An isolation structure is also provided between adjacent chambers to prevent backflow or cross-chamber bypass. When the water quality safety sensor in the safety regulating chamber detects a safe condition, the controller controls the switching valve of the safety regulating chamber to connect with the qualified outlet. When the detection value does not meet the safety condition, the controller controls the switching valve to connect with the return channel. The controller adjusts the operating status of the inlet unit, backwash assembly, aeration assembly, electrocoagulation electrode pair, and electrochemical oxidation electrode pair according to the blockage status of the pretreatment chamber and the available power energy of the power supply unit. In application, the aquaculture water to be treated enters the pretreatment chamber through the inlet unit. The pretreatment chamber removes suspended solids from the aquaculture water to be treated, resulting in pretreated water. The pretreated water enters the biological treatment chamber via a flow guide structure. The biological treatment chamber removes ammonia nitrogen, total nitrogen, and biodegradable organic matter from the pretreated water, resulting in biologically treated water. This biologically treated water then enters the electrochemical treatment chamber via the same flow guide structure. The electrochemical treatment chamber removes phosphates from the biologically treated water through flocculation and oxidizes or structurally transforms new organic pollutants, resulting in purified water. This purified water then enters the safety regulating chamber via a flow guide structure. A water quality safety sensor in the safety regulating chamber monitors the purified water. When the measured value meets safety conditions, the controller connects the switching valve of the safety regulating chamber to the qualified outlet, and the purified water is discharged through the qualified outlet. When the measured value does not meet safety conditions, the controller connects the switching valve to the return channel, and the purified water returns to the pretreatment chamber or biological treatment chamber for further treatment until the measured value meets safety conditions again, at which point it is discharged through the qualified outlet. This achieves graded and synergistic purification of nutrients and new organic pollutants in aquaculture water. The advantages of this invention also include:

[0043] Firstly, the pretreatment chamber removes suspended solids from the aquaculture water to be treated, preventing the retained solids from re-entering the aquaculture water and thus reducing the risks of biofilm coverage, flow channel blockage, and electrode contamination, ensuring that each treatment unit remains in an effective working state during long-term operation.

[0044] Secondly, by forming a non-bypass sequential flow path through the flow guiding and isolation structures between adjacent compartments, the water must pass through in the order of pretreatment, biological treatment, electrochemical treatment, and safety regulation, thereby avoiding the bypass discharge of incompletely treated water, ensuring that each treatment process is fully executed, and that the treatment effect does not fluctuate due to short-circuiting.

[0045] Thirdly: The water quality safety sensor and switching valve in the safety regulating chamber are used to control the safety of the effluent. Only when the detection value meets the safety conditions is the effluent allowed to be discharged. Otherwise, it is returned for further treatment, thereby preventing residual oxidizing substances from returning directly to the pool and ensuring the safety of aquaculture organisms and the continuous safe operation of the equipment.

[0046] Fourthly: The controller adjusts the operating status of the water inlet unit, backwashing component, aeration component, electrocoagulation electrode pair, and electrochemical oxidation electrode pair according to the blockage status of the pretreatment chamber and the available power energy of the power supply unit. This prevents untreated water from being bypassed and discharged when the filter is blocked or the power supply is insufficient, so that the equipment can still maintain a safe operating state under fault or power supply fluctuation conditions.

[0047] Therefore, this invention can not only synergistically purify nutrients and new organic pollutants in aquaculture water, but also exhibits good long-term operational stability in synergistic purification.

[0048] 2. This invention provides a floating aquaculture water nutrient and organic pollutant graded synergistic purification device. The controller determines the clogging status of the pretreatment chamber based on the pressure or level difference between the upstream and downstream of the self-cleaning microporous filter. When the pressure or level difference exceeds the clogging threshold, the controller reduces or stops the inlet flow rate of the water inlet unit and activates the backwashing assembly to backwash the self-cleaning microporous filter. After backwashing, the controller rereads the pressure or level difference. When the pressure or level difference returns to below the reset threshold, the controller controls the water inlet unit to resume water intake; otherwise, the controller controls the device to... The system maintains a standby state while displaying maintenance prompts. During application, the self-cleaning microporous filter element automatically maintains its filtration flux during long-term operation, eliminating the need for frequent manual checks and cleaning. When the self-cleaning microporous filter element becomes clogged and cannot be recovered through backwashing, the equipment automatically stops water intake and displays a maintenance prompt, preventing continued operation in a filtration failure state. This reduces the frequency of manual inspections and cleaning, and prevents a decrease in treated water volume and impact on subsequent treatment units due to filter clogging. This ensures the pretreatment chamber maintains stable filtration capacity during long-term operation, facilitating long-term operation and maintenance. Therefore, this invention not only offers good long-term operational stability for synergistic purification but also facilitates long-term operation and maintenance.

[0049] 3. This invention provides a floating aquaculture water nutrient and organic pollutant graded synergistic purification equipment. When the available power energy of the power supply unit is not higher than a first threshold, the controller controls the electrochemical oxidation electrode pair to stop operating and controls the inlet unit, backwash component, and aeration component to operate intermittently. When the available power energy of the power supply unit is higher than the first threshold but not higher than a second threshold, the controller controls the inlet unit, backwash component, and aeration component to operate continuously and selectively operates the electrocoagulation electrode pair. When the available power energy of the power supply unit is higher than the second threshold, the controller controls the inlet unit, aeration component, electrocoagulation electrode pair, and electrochemical oxidation electrode pair to operate according to a set treatment flow. The system operates continuously, with the second threshold exceeding the first threshold. During application, when the available power supply to the power unit decreases, the controller automatically adjusts the operating status of each electrical component according to a three-level load scheduling system. Priority is given to maintaining basic loads such as safety monitoring, anti-clogging backwashing, and necessary aeration. Electrocoagulation operates selectively as a medium-priority load, while electrochemical oxidation, as a high-energy-consuming load, is prioritized for shutdown or load reduction, simultaneously reducing the influent flow rate. This ensures that high-energy-consuming units do not continue to consume power under inefficient conditions when power supply is insufficient, maintaining a match between treated water volume and available treatment capacity. This avoids ineffective energy consumption and excessive energy release, protects the biofilm carrier and electrodes, and reduces frequent start-ups and shutdowns. Therefore, this invention not only facilitates long-term operation and maintenance but also maintains the integrity of the water treatment chain under fluctuating power supply conditions.

[0050] 4. This invention provides a floating aquaculture water nutrient and organic pollutant graded synergistic purification equipment, further comprising a buffer tank located between the biological treatment tank and the electrochemical treatment tank. When the electrochemical treatment tank stops operating, the controller controls the water inlet unit to reduce the inlet flow rate, and stops the water inlet unit when the buffer tank level reaches its upper limit. In application, when the electrochemical treatment tank stops operating due to insufficient power supply, maintenance, or abnormal conditions, the controller controls the water inlet unit to reduce the inlet flow rate, and the water treated by the biological treatment tank is temporarily stored in the buffer tank. When the buffer tank level reaches its upper limit, the controller controls the water inlet unit to stop the water inlet, thereby preventing the water treated by the biological treatment tank from bypassing the shut-down electrochemical treatment tank and directly entering the safety regulating tank, thus avoiding the bypass discharge of untreated water. Therefore, this invention not only maintains the integrity of the water treatment chain under fluctuating power supply conditions, but also achieves fail-safe operation through buffer tank storage and level interlocking to stop water inlet.

[0051] 5. This invention provides a floating aquaculture water nutrient and organic pollutant graded synergistic purification device. The electrochemical treatment chamber further includes a floc interception component and a sludge discharge channel. The floc interception component is located between the electrocoagulation electrode pair and the electrochemical oxidation electrode pair. The sludge discharge channel is connected to a backwash solid collection chamber or a separately installed sludge discharge container. The backwash solid collection chamber includes a one-way inlet, a detachable solid collection basket, and a return filter port. The one-way inlet only allows backwash liquid to enter. The return filter port is located downstream of the detachable solid collection basket and is connected to the water inlet side of the pretreatment chamber. In application, the phosphorus-containing flocs and colloidal particles formed by the electrocoagulation electrode pair are intercepted by the floc interception component and discharged into the backwash solid collection chamber or the separately installed sludge discharge container through the sludge discharge channel. In the backwash solid collection chamber, solids are intercepted by the detachable solid collection basket. The backwash liquid returns to the water inlet side of the pretreatment chamber through the return filter port. The solids are periodically removed and do not re-enter the subsequent electrochemical oxidation zone. Therefore, this invention not only achieves failure safety by temporarily storing in a buffer chamber and stopping water intake through liquid level interlocking, but also improves maintenance convenience. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the overall structure of the synergistic purification equipment described in this invention.

[0053] Figure 2 This is a schematic diagram of the forced series flow path of each processing compartment in this invention.

[0054] Figure 3 This is a schematic diagram of the connection relationship of the collaborative purification equipment described in this invention.

[0055] Figure 4 This is a schematic diagram of the connection relationship of the pretreatment chamber described in this invention.

[0056] Figure 5 This is a schematic diagram showing the connection relationship between the biological treatment chamber and the electrochemical treatment chamber described in this invention.

[0057] Figure 6 This is a schematic diagram of the connection relationship of the safety adjustment compartment described in this invention.

[0058] Figure 7 This is a schematic diagram of load and hierarchical load control in this invention.

[0059] Figure 8 This is a schematic diagram of the layout of the aquaculture water body in this invention.

[0060] In the diagram: Floating support 100, buoyancy assembly 101, flow guiding structure 102, isolation structure 103, load-bearing frame 104, anchoring assembly 105, treatment chamber 120, power supply unit 200, photovoltaic power generation assembly 210, energy storage assembly 220, shore power interface 230, power management assembly 240, water inlet unit 300, water inlet end 301, water outlet end 302, water inlet pump 310, pretreatment chamber 400, coarse interception component 410, self-cleaning microporous filter component 420, backwash assembly 430, backwash solids collection chamber 440, detachable solids collection basket 441, biological... Treatment chamber 500, flow guide baffle 501, aeration zone 502, low oxygen zone 503, biofilm carrier 510, aeration component 520, electrochemical treatment chamber 600, electrocoagulation electrode pair 610, electrochemical oxidation electrode pair 620, floc interception component 630, sludge discharge channel 631, safety regulating chamber 700, first detection position 701, second detection position 702, water quality safety sensor 710, residual oxidant reduction component 720, switching valve 730, reflux channel 740, reflux control component 750, controller 800, qualified outlet 900, buffer chamber 910. Detailed Implementation

[0061] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0062] See Figures 1-8 A floating aquaculture water body nutrient salt and organic new pollutant graded and synergistic purification equipment, the equipment includes a floating carrier 100, a treatment chamber 120, a water inlet unit 300, a power supply unit 200 and a controller 800.

[0063] The floating support 100 includes a buoyancy assembly 101 for supporting the processing compartment 120;

[0064] The treatment chamber 120 includes a pretreatment chamber 400, a biological treatment chamber 500, an electrochemical treatment chamber 600, and a safety regulating chamber 700 arranged sequentially along the water flow direction; adjacent chambers are connected by a flow guiding structure 102, which is used to guide water to flow in one direction; an isolation structure 103 is also provided between adjacent chambers to prevent water from flowing back or bypassing across chambers;

[0065] The pretreatment chamber 400 includes a coarse interceptor 410 and a self-cleaning microporous filter 420 arranged sequentially along the water flow direction; the self-cleaning microporous filter 420 is provided with a backwashing assembly 430 on the clean water side; the sewage discharge side of the backwashing assembly 430 is connected to the backwash solid collection chamber 440, and the backwash solid collection chamber 440 is isolated from the water flow path formed by the flow guiding structure 102.

[0066] The biological treatment chamber 500 includes an aeration component 520 and a biofilm carrier 510, with the biofilm carrier 510 positioned above the aeration component 520; the electrochemical treatment chamber 600 includes an electrocoagulation electrode pair 610 and an electrochemical oxidation electrode pair 620 arranged sequentially along the water flow direction.

[0067] The safety regulating chamber 700 includes a water quality safety sensor 710, a qualified water outlet 900, a switching valve 730, and a return channel 740. The switching valve 730 is connected to both the qualified water outlet 900 and the return channel 740. The return channel 740 is selectively connected to the inlet side of the pretreatment chamber 400 or the inlet of the biological treatment chamber 500 via a return control component 750. The return control component 750 is used to provide return power and prevent backflow.

[0068] The water inlet unit 300 includes an inlet end 301 and an outlet end 302. The inlet end 301 is located in the water intake area of ​​the aquaculture water body to be treated. The outlet end 302 is connected to the pretreatment chamber 400.

[0069] The power supply unit 200 is used to supply power to the equipment;

[0070] The controller 800 is electrically connected to the water quality safety sensor 710 and the switching valve 730 respectively. When the detection value of the water quality safety sensor 710 meets the safety conditions, the controller 800 controls the switching valve 730 to connect with the qualified water outlet 900. When the detection value of the water quality safety sensor 710 does not meet the safety conditions, the controller 800 controls the switching valve 730 to connect with the return channel 740. The controller 800 adjusts the operating status of the water inlet unit 300, backwash assembly 430, aeration assembly 520, electrocoagulation electrode pair 610, and electrochemical oxidation electrode pair 620 according to the blockage status of the pretreatment chamber 400 and the available power of the power supply unit 200.

[0071] The controller 800 determines the clogging status of the pretreatment chamber 400 based on the pressure difference or liquid level difference between the upstream and downstream of the self-cleaning microporous filter element 420.

[0072] When the pressure difference or liquid level difference exceeds the clogging threshold, the controller 800 reduces or stops the water inlet flow of the water inlet unit 300 and starts the backwashing assembly 430 to backwash the self-cleaning microporous filter element 420.

[0073] After backwashing is completed, the controller 800 rereads the pressure difference or liquid level difference. When the pressure difference or liquid level difference returns to below the reset threshold, the controller 800 controls the water inlet unit 300 to resume water intake. Otherwise, the controller 800 controls the equipment to remain shut down and outputs a maintenance prompt.

[0074] The controller 800 performs at least the following three levels of load scheduling based on the available electrical energy of the power supply unit 200:

[0075] When the available electrical energy of the power supply unit 200 is not higher than the first threshold, the controller 800 controls the electrochemical oxidation electrode pair 620 to stop operating and controls the water inlet unit 300, backwash assembly 430 and aeration assembly 520 to operate intermittently.

[0076] When the available electrical energy of the power supply unit 200 is higher than the first threshold and not higher than the second threshold, the controller 800 controls the water inlet unit 300, the backwash component 430 and the aeration component 520 to operate continuously, and selectively operates the electrocoagulation electrode pair 610.

[0077] When the available electrical energy of the power supply unit 200 is higher than the second threshold, the controller 800 controls the water inlet unit 300, the aeration component 520, the electrocoagulation electrode pair 610 and the electrochemical oxidation electrode pair 620 to operate continuously according to the set treatment flow rate.

[0078] The second threshold is higher than the first threshold.

[0079] The equipment also includes a buffer chamber 910, which is disposed between the biological treatment chamber 500 and the electrochemical treatment chamber 600;

[0080] When the electrochemical treatment chamber 600 stops operating, the controller 800 controls the water inlet unit 300 to reduce the water inlet flow rate, and controls the water inlet unit 300 to stop water intake when the liquid level in the buffer chamber 910 reaches the upper limit.

[0081] The safety regulating chamber 700 is provided with a first detection position 701, a residual oxidant reduction component 720 and a second detection position 702 arranged sequentially along the water flow direction;

[0082] The switching valve 730 is located at the end of the safety regulating chamber 700, and the qualified water outlet 900 and the return channel 740 are respectively connected to the water outlet side of the switching valve 730.

[0083] The water quality safety sensor 710 is installed at the first detection position 701 and the second detection position 702.

[0084] The water quality safety sensor 710 is any one or any combination of total residual chlorine sensor, free residual chlorine sensor, oxidation-reduction potential sensor, pH sensor, and conductivity sensor;

[0085] The residual oxidant reduction component 720 is any one or any combination of activated carbon, reducing filter media, catalytic decomposition materials, and aeration removal components.

[0086] The biological treatment chamber 500 also includes a flow guide baffle 501, which divides the biological treatment chamber 500 into an aeration zone 502 and a low-oxygen zone 503.

[0087] The biofilm carrier 510 is distributed in the aeration zone 502 and the low oxygen zone 503; the aeration component 520 is located at the bottom of the aeration zone 502 and operates intermittently.

[0088] The electrochemical treatment chamber 600 also includes a floc interception component 630 and a sludge discharge channel 631;

[0089] The floc interceptor 630 is disposed between the electrocoagulation electrode pair 610 and the electrochemical oxidation electrode pair 620, and the sludge discharge channel 631 is connected to the backwash solid collection chamber 440 or an independently disposed sludge discharge container.

[0090] The backwash solid collection chamber 440 includes a one-way inlet, a detachable solid collection basket 441, and a return filter port;

[0091] The one-way inlet only allows backwash fluid to enter; the return filter port is located downstream of the removable solid collection basket 441 and is connected to the water inlet side of the pretreatment chamber 400.

[0092] The power supply unit 200 includes a power management component 240, a photovoltaic power generation component 210, an energy storage component 220, and a shore power interface 230;

[0093] The photovoltaic power generation module 210, energy storage module 220, and shore power interface 230 are electrically connected to the power management module 240, which supplies power to the water inlet unit 300, backwash module 430, aeration module 520, electrocoagulation electrode pair 610, electrochemical oxidation electrode pair 620, switching valve 730, reflux control module 750, and controller 800.

[0094] The following are supplementary descriptions of the present invention:

[0095] The novel organic pollutants described in this invention refer to trace organic pollutants that are of concern in aquaculture water or aquaculture wastewater and can be removed or structurally transformed by the configured electrochemical system; specifically, the novel organic pollutants are any one or any combination of antibiotics, other veterinary drugs, hormones, pesticides, algal toxins, personal care product ingredients, and endocrine disruptors; the specific scope of application is determined by the electrode materials, operating parameters, and verification data.

[0096] The buoyancy component 101 of the present invention can be any one or any combination of a closed buoy box, a buoy cylinder, or a foam-filled float; the buoyancy component 101 is arranged around the treatment chamber 120; the buoyancy component 101 is used to bear the main buoyancy of the treatment chamber 120, and the treatment chamber 120 undertakes the water treatment function, thereby reducing the impact of liquid level changes in the treatment chamber 120 on the floating stability.

[0097] Preferably, the pretreatment chamber 400, biological treatment chamber 500, electrochemical treatment chamber 600 and safety regulating chamber 700 are each equipped with an openable top cover and an inspection and drainage port; so as to facilitate the inspection, cleaning and maintenance of the interior of each treatment chamber, and to drain the water in the chamber through the inspection and drainage port when necessary.

[0098] Preferably, an insulating isolation element is provided between the electrochemical treatment chamber 600 and the floating support 100 in this invention; to prevent the current from the electrochemical treatment chamber 600 during operation from being conducted to the floating support 100, thereby reducing the risk of electric shock and electrical failure.

[0099] Preferably, the power supply unit 200 of the present invention is equipped with leakage protection, overcharge protection, over-discharge protection, short circuit protection and lightning protection components; so as to ensure the safe operation of the power supply unit 200 during the connection of photovoltaic power generation module 210, energy storage module 220 and shore power interface 230, and avoid equipment damage and safety accidents caused by leakage, battery overcharge and over-discharge, short circuit or lightning strike.

[0100] Example 1:

[0101] See Figures 1-8 A floating aquaculture water body nutrient salt and organic new pollutant graded and synergistic purification equipment, the equipment includes a floating carrier 100, a treatment chamber 120, a water inlet unit 300, a power supply unit 200 and a controller 800.

[0102] The floating support 100 includes a buoyancy assembly 101 for supporting the processing compartment 120;

[0103] The treatment chamber 120 includes a pretreatment chamber 400, a biological treatment chamber 500, an electrochemical treatment chamber 600, and a safety regulating chamber 700 arranged sequentially along the water flow direction; adjacent chambers are connected by a flow guiding structure 102, which guides water to flow unidirectionally; an isolation structure 103 is also provided between adjacent chambers to prevent backflow or cross-chamber bypass; the pretreatment chamber 400 includes a coarse interceptor 410 and a self-cleaning microporous filter 420 arranged sequentially along the water flow direction; the clean water side of the self-cleaning microporous filter 420 is provided with a backwash assembly 430; the sewage discharge side of the backwash assembly 430 is connected to a backwash solid collection chamber 440, which is isolated from the water flow path formed by the flow guiding structure 102; The biological treatment chamber 500 includes an aeration assembly 520 and a biofilm carrier 510, with the biofilm carrier 510 positioned above the aeration assembly 520. The electrochemical treatment chamber 600 includes an electrocoagulation electrode pair 610 and an electrochemical oxidation electrode pair 620 arranged sequentially along the water flow direction. The safety regulation chamber 700 includes a water quality safety sensor 710, a qualified outlet 900, a switching valve 730, and a return channel 740. The switching valve 730 is connected to both the qualified outlet 900 and the return channel 740. The return channel 740 is selectively connected to the inlet side of the pretreatment chamber 400 or the inlet of the biological treatment chamber 500 via a return control assembly 750. The return control assembly 750 provides return power and prevents backflow.

[0104] The water inlet unit 300 includes an inlet end 301 and an outlet end 302. The inlet end 301 is located in the water intake area of ​​the aquaculture water body to be treated. The outlet end 302 is connected to the pretreatment chamber 400.

[0105] The power supply unit 200 is used to supply power to the equipment;

[0106] The controller 800 is electrically connected to the water quality safety sensor 710 and the switching valve 730 respectively. When the detection value of the water quality safety sensor 710 meets the safety conditions, the controller 800 controls the switching valve 730 to connect with the qualified water outlet 900. When the detection value of the water quality safety sensor 710 does not meet the safety conditions, the controller 800 controls the switching valve 730 to connect with the return channel 740. The controller 800 adjusts the operating status of the water inlet unit 300, backwash assembly 430, aeration assembly 520, electrocoagulation electrode pair 610, and electrochemical oxidation electrode pair 620 according to the blockage status of the pretreatment chamber 400 and the available power of the power supply unit 200.

[0107] In application, the floating carrier 100 floats on the water surface of the aquaculture pond, aquaculture tailwater ditch or tailwater collection area through the buoyancy component 101, and the treatment chamber 120 is supported by the buoyancy component 101 and kept stable.

[0108] The water inlet unit 300 draws water from the water intake area of ​​the aquaculture water to be treated at its inlet end 301. The aquaculture water to be treated enters the pretreatment chamber 400 through the outlet end 302. In the pretreatment chamber 400, the coarse interceptor 410 first intercepts aquatic plants, uneaten feed clumps, and larger algae clumps in the aquaculture water to be treated. The water flow continues to pass through the self-cleaning microporous filter 420, which traps smaller algae clumps, fecal particles, and other suspended solids on the wastewater side of the filter screen. The filtered water is used as the pretreated water. During operation, when the controller 800 determines that the pretreatment chamber 400 is blocked, it controls the water inlet unit 300 to reduce or stop the water intake and starts the backwash assembly 430 to backwash the self-cleaning microporous filter 420. The solid-containing liquid generated by backwashing enters the backwash solid collection chamber 440 through the sewage side. The solids are collected. After backwashing, the controller 800 controls the water inlet unit 300 to resume or stop the water intake according to the blockage status.

[0109] The pretreated water enters the biological treatment chamber 500 via the guide structure 102. In the biological treatment chamber 500, the aeration component 520, located below the biofilm carrier 510, aerates the water surrounding the biofilm carrier 510, providing dissolved oxygen. Under dissolved oxygen conditions, nitrifying bacteria on the biofilm carrier 510 convert ammonia nitrogen in the pretreated water into nitrate nitrogen. Denitrifying bacteria under low oxygen conditions reduce nitrate nitrogen to nitrogen gas. Simultaneously, aerobic heterotrophic bacteria on the biofilm carrier 510 reduce biodegradable organic matter in the water, resulting in biologically treated water.

[0110] The biologically treated water enters the electrochemical treatment chamber 600 via the flow guide structure 102. In the electrochemical treatment chamber 600, the electrocoagulation electrode pair 610 uses an iron-based or aluminum-based soluble anode. After being energized, iron ions or aluminum ions are generated, which react with phosphates and colloidal particles in the biologically treated water to form insoluble flocs. The water that has formed flocs continues to flow into the electrochemical oxidation electrode pair 620. The electrochemical oxidation electrode pair 620, through a size-stable anode and a cathode arranged opposite to it, directly or indirectly oxidizes new organic pollutants such as antibiotics, veterinary drugs, hormones, and pesticides in the biologically treated water, causing the new organic pollutants to undergo oxidation or structural transformation, thus obtaining purified water.

[0111] The purified water enters the safety regulating chamber 700 through the guide structure 102. In the safety regulating chamber 700, the water quality safety sensor 710 detects the purified water. When the detected value of the purified water meets the safety conditions, the controller 800 controls the switching valve 730 to connect with the qualified outlet 900, and the purified water is discharged through the qualified outlet 900, either returned to the pool or discharged. When the detected value does not meet the safety conditions, the controller 800 controls the switching valve 730 to connect with the return channel 740, and the purified water is selectively returned to the inlet side of the pretreatment chamber 400 or the inlet of the biological treatment chamber 500 for further treatment under the return power and anti-backflow effect provided by the return control component 750 through the return channel 740.

[0112] Throughout the operation, the controller 800 adjusts the operating status of the inlet water unit 300, backwash assembly 430, aeration assembly 520, electrocoagulation electrode pair 610, and electrochemical oxidation electrode pair 620 based on the blockage status of the pretreatment chamber 400 and the available power energy of the power supply unit 200, so that the treated water volume always matches the available treatment capacity. When the available power energy of the power supply unit 200 decreases, the controller 800 prioritizes maintaining water quality safety monitoring and basic load operation, stops or reduces the load of the electrochemical oxidation electrode pair 620, and simultaneously reduces the inlet water flow rate to prevent untreated water from being bypassed and discharged.

[0113] Specifically, the flow guiding structure 102 is any one or any combination of an overflow port with a limited height, a flow guiding pipe, and a flow guiding groove; the isolation structure 103 is any one or any combination of a watertight baffle, a check valve, a liquid seal structure, and a height difference structure.

[0114] The coarse interceptor 410 is any one or a combination of a pull-out grid basket and a rotary drum grid.

[0115] The self-cleaning microporous filter element 420 is any one or a combination of cylindrical filter screen and belt filter screen;

[0116] The backwashing component 430 is any one or any combination of nozzles, scrapers, and reverse water flow channels disposed on the water purification side of the self-cleaning microporous filter 420.

[0117] The reflux control component 750 is any one or any combination of a reflux pump, a differential reflux structure, a check valve, and a selector valve.

[0118] See Figure 1 , Figure 3Multiple enclosed buoyancy components 101 are arranged around the treatment chamber 120 and connected by a support frame 104. The interior of the treatment chamber 120 is divided into a pretreatment chamber 400, a biological treatment chamber 500, an electrochemical treatment chamber 600, and a safety regulating chamber 700 by watertight partitions. Each watertight partition has an overflow port only at a specified position, and adjacent overflow ports are staggered vertically, so that the water flows through the corresponding treatment area along the guiding direction. The water inlet unit 300 includes a water inlet pump 310, which draws water from a pond bypass, tailwater channel, or tailwater collection area. The qualified water outlet 900 is located on one side at a predetermined distance from the water inlet end 301, or connected to a reuse pipeline or a discharge pipeline. Check valves are installed at the water inlet pipe of the water inlet end 301, the connection between adjacent chambers, and the qualified water outlet to reduce short-flow and backflow.

[0119] Example 2:

[0120] The basic content is the same as in Embodiment 1, except that: the controller 800 determines the clogging status of the pretreatment chamber 400 based on the pressure difference or liquid level difference between the upstream and downstream of the self-cleaning microporous filter element 420; when the pressure difference or liquid level difference exceeds the clogging threshold, the controller 800 reduces or stops the water inlet flow of the water inlet unit 300 and starts the backwashing assembly 430 to backwash the self-cleaning microporous filter element 420; after the backwashing is completed, the controller 800 rereads the pressure difference or liquid level difference; when the pressure difference or liquid level difference returns to below the reset threshold, the controller 800 controls the water inlet unit 300 to resume water intake; otherwise, the controller 800 controls the equipment to remain shut down and outputs a maintenance prompt.

[0121] The controller 800 performs at least the following three levels of load scheduling based on the available electrical energy of the power supply unit 200: When the available electrical energy of the power supply unit 200 is not higher than a first threshold, the controller 800 controls the electrochemical oxidation electrode pair 620 to stop operating and controls the water inlet unit 300, backwash assembly 430, and aeration assembly 520 to operate intermittently; When the available electrical energy of the power supply unit 200 is higher than the first threshold but not higher than a second threshold, the controller 800 controls the water inlet unit 300, backwash assembly 430, and aeration assembly 520 to operate continuously and selectively operates the electrocoagulation electrode pair 610; When the available electrical energy of the power supply unit 200 is higher than the second threshold, the controller 800 controls the water inlet unit 300, aeration assembly 520, electrocoagulation electrode pair 610, and electrochemical oxidation electrode pair 620 to operate continuously according to a set treatment flow rate; wherein, the second threshold is higher than the first threshold.

[0122] In application, pressure sensors or liquid level sensors are respectively installed upstream and downstream of the self-cleaning microporous filter element 420, or a differential pressure sensor is connected across both sides of the self-cleaning microporous filter element 420 to obtain the pressure difference or liquid level difference between the upstream and downstream of the self-cleaning microporous filter element 420; the controller 800 is electrically connected to the sensor (pressure sensor, liquid level sensor or differential pressure sensor) and the backwashing assembly 430 respectively.

[0123] During operation, the sensor provides real-time feedback to the controller 800 on the pressure difference or liquid level difference between the upstream and downstream of the self-cleaning microporous filter element 420. When the pressure difference or liquid level difference exceeds the clogging threshold, it indicates that a large amount of trapped solids has accumulated on the surface of the self-cleaning microporous filter element 420, increasing the filtration resistance. The controller 800 first controls the water inlet unit 300 to reduce or stop the water inlet flow to avoid continued operation under conditions of excessive filtration resistance. Subsequently, the backwashing component 430 is activated. The backwashing component 430 removes the solids adhering to the self-cleaning microporous filter element 420 through methods such as spraying, scraping, or reverse water flow on the clean water side. The trapped material on the surface of the filter is peeled off and discharged into the backwash solids collection chamber 440. After backwashing, the controller 800 reads the pressure difference or liquid level difference again: if the pressure difference or liquid level difference returns to below the reset threshold, it means that the filter flux has been restored, and the controller 800 controls the water inlet unit 300 to resume water intake; if the pressure difference or liquid level difference is still higher than the reset threshold, it means that the self-cleaning microporous filter 420 has a blockage that is difficult to be restored by conventional backwashing, the controller 800 controls the equipment to keep the water intake stopped and outputs a maintenance prompt, and the maintenance personnel disassemble, clean or replace the self-cleaning microporous filter 420.

[0124] Through closed-loop control of differential pressure or liquid level difference detection, blockage judgment, automatic backwashing and recovery judgment, the pretreatment chamber 400 can automatically maintain the filtration flux during long-term operation, avoiding the impact of blockage operation on subsequent treatment units, while reducing the frequency of manual inspection and disassembly, which facilitates the long-term operation and maintenance of the equipment.

[0125] Specifically, the clogging threshold is 2-3 times the initial pressure difference of the self-cleaning microporous filter element 420 in a clean state, or the difference in liquid level between the upstream and downstream reaches 30-50 mm. This setting is to initiate backwashing in a timely manner before the solids trapped on the surface of the self-cleaning microporous filter element 420 cause serious clogging and the filtration flux does not decrease significantly, thus avoiding further increase in filtration resistance leading to a decrease in treated water volume and impact on subsequent treatment units. The reset threshold is 1.2-1.5 times the initial pressure difference of the self-cleaning microporous filter element 420 in a clean state, or the difference in liquid level between the upstream and downstream is less than 10-15 mm. This setting is to confirm that backwashing has restored the flux of the filter element to a near-clean state, avoiding the resumption of water intake before sufficient backwashing, and ensuring that the reset threshold is significantly lower than the clogging threshold, forming a hysteresis between initiation and reset, preventing frequent switching between backwashing and resumption of water intake near the threshold. The specific values ​​of the clogging threshold and reset threshold should be determined through experiments based on the suspended solids concentration of the aquaculture water, the filter mesh size, the treatment flux, and the backwashing intensity.

[0126] In addition, the power supply unit 200 supplies power to each electrical component in the equipment through the power management component 240, and the controller 800 obtains the available power of the power supply unit 200 in real time; specifically, the available power of the power supply unit 200 can be obtained by the power management component 240 detecting the remaining capacity of the energy storage component 220 or the DC bus voltage.

[0127] When the available power of the power supply unit 200 is not higher than the first threshold, it means that the current power supply capacity can only maintain basic operation. The controller 800 controls the electrochemical oxidation electrode pair 620 to stop operating and controls the water inlet unit 300, backwash component 430 and aeration component 520 to operate intermittently, so that the equipment can still maintain water quality safety monitoring and biofilm activity under low energy consumption, and avoid the complete shutdown of the equipment.

[0128] When the available electrical energy of the power supply unit 200 is higher than the first threshold but not higher than the second threshold, the controller 800 controls the water inlet unit 300, backwash component 430 and aeration component 520 to resume continuous operation, and selectively operates the electrocoagulation electrode pair 610 according to the treatment requirements, giving priority to ensuring the basic functions of suspended solids interception, anti-clogging backwashing and biological treatment; the treatment requirements include whether the phosphate or colloidal load in the current water body is rising, whether it is in the phosphorus removal priority operation mode, and whether the current available electrical energy is sufficient to support the electrocoagulation operation without affecting the basic loads such as water inlet, backwashing and aeration;

[0129] When the available electrical energy of the power supply unit 200 is higher than the second threshold, the power supply capacity is sufficient, and the controller 800 controls the water inlet unit 300, aeration component 520, electrocoagulation electrode pair 610 and electrochemical oxidation electrode pair 620 to operate continuously according to the set treatment flow rate, and the equipment enters the full-load collaborative purification state; the set treatment flow rate is the rated treatment flow rate determined during the equipment design, or the target treatment flow rate preset by the user through the controller 800 according to the actual aquaculture water treatment needs.

[0130] Through three-level load scheduling, the water treatment capacity of the equipment is always matched with the available power energy of the power supply unit 200. Under the condition of power supply fluctuation, it can maintain the integrity of the treatment chain, prevent the high-energy-consuming electrochemical oxidation unit from continuing to operate when the power supply is insufficient, prevent the bypass discharge of untreated water, and reduce the over-discharge of energy storage and frequent start-stop.

[0131] Specifically, the first threshold is 15%-20% of the rated capacity of the energy storage component 220 because: the first threshold is used to ensure that the minimum power can still be reserved for the water quality safety sensor 710, controller 800, and intermittently operating water inlet unit 300, backwash component 430 and aeration component 520 under low power conditions, so as to avoid over-discharge of the energy storage component 220; the second threshold is 40%-50% of the rated capacity of the energy storage component 220 because: the second threshold is used to ensure that the electrochemical oxidation electrode pair 620 will not frequently start and stop or experience voltage instability due to insufficient power supply during continuous operation, so as to ensure stable operation of the equipment under full load.

[0132] Example 3:

[0133] The basic content is the same as in Embodiment 1, except that the equipment also includes a buffer chamber 910, which is located between the biological treatment chamber 500 and the electrochemical treatment chamber 600. When the electrochemical treatment chamber 600 stops operating, the controller 800 controls the water inlet unit 300 to reduce the water inlet flow rate, and controls the water inlet unit 300 to stop water intake when the liquid level in the buffer chamber 910 reaches the upper limit.

[0134] In operation, when the electrochemical treatment chamber 600 stops operating due to insufficient power supply, maintenance, or abnormal conditions, the controller 800 controls the water inlet unit 300 to reduce the water flow rate, thereby reducing the amount of water entering the biological treatment chamber 500. The water treated in the biological treatment chamber 500 enters the buffer chamber 910 for temporary storage via the guide structure 102. The buffer chamber 910 is equipped with a liquid level sensor, which is electrically connected to the controller 800 to monitor the liquid level in the buffer chamber 910 in real time. When the liquid level in the buffer chamber 910 reaches the upper limit, the controller 800 controls the water inlet unit... When water intake stops at 300, the biological treatment chamber 500 no longer supplies water to the buffer chamber 910, preventing water in the buffer chamber 910 from entering the deactivated electrochemical treatment chamber 600 via the guide structure 102 due to excessively high liquid levels, and further entering the safety regulating chamber 700. During the period when the electrochemical treatment chamber 600 is not in operation, the biologically treated water is retained in the buffer chamber 910 and will not bypass the deactivated electrochemical treatment chamber 600 to directly enter the safety regulating chamber 700, thereby preventing the bypass discharge of untreated water and ensuring the integrity of the treatment chain.

[0135] Example 4:

[0136] The basic content is the same as in Embodiment 1, except that: the safety regulating chamber 700 is provided with a first detection position 701, a residual oxidant reduction component 720 and a second detection position 702 arranged sequentially along the water flow direction; the switching valve 730 is located at the end of the safety regulating chamber 700, and the qualified water outlet 900 and the return channel 740 are respectively connected to the water outlet side of the switching valve 730; the water quality safety sensor 710 is installed at the first detection position 701 and the second detection position 702.

[0137] The water quality safety sensor 710 is any one or any combination of a total residual chlorine sensor, a free residual chlorine sensor, a redox potential sensor, a pH sensor, and a conductivity sensor; the residual oxidant reduction component 720 is any one or any combination of activated carbon, reducing filter media, catalytic decomposition materials, and aeration removal components.

[0138] In application, after the purified water enters the safety regulating chamber 700 through the flow guiding structure 102, it first reaches the first detection position 701. The water quality safety sensor 710 at the first detection position 701 detects parameters such as total residual chlorine, free residual chlorine, oxidation-reduction potential, pH, or conductivity in the purified water. When the detection value at the first detection position 701 shows that the residual oxidizing substances are still high, the purified water continues to flow through the residual oxidant reduction component 720, where activated carbon, reducing filter media, catalytic decomposition materials, or aeration removal components reduce the residual oxidizing substances. Subsequently, the water reaches the second detection position 702, where the water quality safety sensor 710 detects it again.

[0139] The controller 800 determines whether the safety conditions are met based on the detection value of the second detection position 702: when the detection value meets the safety conditions, the controller 800 controls the switching valve 730 to connect with the qualified water outlet 900, and the purified water is discharged through the qualified water outlet 900; when the detection value does not meet the safety conditions, the controller 800 controls the switching valve 730 to connect with the return channel 740, and the purified water is returned to the inlet side of the pretreatment chamber 400 or the inlet of the biological treatment chamber 500 for further treatment through the return channel 740.

[0140] The return flow destination is selected according to the following rules: If residual chlorine, redox potential, or other residual oxidizing substances exceed the limits, but turbidity, suspended solids, and ammonia nitrogen are basically normal, the water should be circulated in the safety regulating chamber 700 through the residual oxidant reduction component 720. If it still fails to meet the standards, it should be returned to the inlet of the biological treatment chamber 500, but it should be confirmed first that the residual oxidizing substances have been reduced to below the protection threshold that does not damage the biofilm. If the failure is caused by turbidity, suspended solids, abnormal filtration, or electrocoagulation floc penetration, it should be returned to the inlet side of the pretreatment chamber 400. If the failure is caused by ammonia nitrogen, biodegradable organic matter, or insufficient biological treatment, it should be returned to the inlet of the biological treatment chamber 500. If the cause cannot be identified, multiple indicators are abnormal at the same time, or the sensor is faulty, a conservative strategy should be adopted to return the water to the inlet side of the pretreatment chamber 400 or stop the water intake and not directly discharge the water.

[0141] For direct return to the pond, the safety conditions are determined through toxicology and field tests based on the aquaculture species, life stage, water temperature, pH, salinity and relevant standards. If the water quality safety sensor 710 fails, expires its calibration period or has missing detection values, the controller 800 controls the switching valve 730 to remain disconnected from the qualified outlet 900, prohibiting the direct discharge of purified water.

[0142] Example 5:

[0143] The basic content is the same as in Embodiment 1, except that: the biological treatment chamber 500 further includes a flow guide baffle 501, which divides the biological treatment chamber 500 into an aeration zone 502 and a low-oxygen zone 503; the biofilm carrier 510 is distributed in the aeration zone 502 and the low-oxygen zone 503; the aeration assembly 520 is located at the bottom of the aeration zone 502, and the aeration assembly 520 operates intermittently.

[0144] In application, the pretreated water (water treated by the pretreatment chamber 400) enters the biological treatment chamber 500 through the guide structure 102 and first enters the aeration zone 502. The aeration components 520 at the bottom of the aeration zone 502 aerate the water intermittently, providing dissolved oxygen to the water in the aeration zone 502 during the aeration phase. Nitrifying bacteria attached to the biofilm carrier 510 distributed in the aeration zone 502 convert ammonia nitrogen in the pretreated water into nitrate nitrogen under sufficient dissolved oxygen conditions. At the same time, aerobic heterotrophic bacteria reduce biodegradable organic matter in the water.

[0145] During the intermittent phase when aeration component 520 stops aeration, the dissolved oxygen in aeration zone 502 gradually decreases, and the water enters the low-oxygen zone 503 through the flow guide baffle 501. The dissolved oxygen in the low-oxygen zone 503 is relatively low, and the denitrifying bacteria attached to the biofilm carrier 510 distributed in the low-oxygen zone 503 reduce nitrate nitrogen to nitrogen gas under low-oxygen conditions, thus completing denitrification. The flow guide baffle 501 separates the aeration zone 502 and the low-oxygen zone 503, preventing the high dissolved oxygen in the aeration zone 502 from directly interfering with the denitrification process in the low-oxygen zone 503.

[0146] By intermittently operating the aeration component 520, the biological treatment chamber 500 alternates between aerobic and hypoxic states, allowing nitrification and denitrification to be completed sequentially within the same chamber, resulting in biologically treated water.

[0147] Specifically, the biofilm carrier 510 is a suspended or fixed frame carrier and is installed inside the biological treatment chamber 500.

[0148] The biological treatment chamber 500 is equipped with a dissolved oxygen sensor in the aeration zone 502, or the aeration zone 502 and the low oxygen zone 503 are each equipped with a dissolved oxygen sensor; the controller 800 is electrically connected to the dissolved oxygen sensor and intermittently drives the aeration assembly 520 according to the dissolved oxygen signal fed back by the dissolved oxygen sensor.

[0149] Example 6:

[0150] The basic content is the same as in Embodiment 1, except that: the electrochemical treatment chamber 600 further includes a floc interception component 630 and a sludge discharge channel 631; the floc interception component 630 is disposed between the electrocoagulation electrode pair 610 and the electrochemical oxidation electrode pair 620, and the sludge discharge channel 631 is connected to the backwash solid collection chamber 440 or an independently disposed sludge discharge container.

[0151] The backwash solids collection chamber 440 includes a one-way inlet, a removable solids collection basket 441, and a return filter port; the one-way inlet only allows backwash liquid to enter; the return filter port is located downstream of the removable solids collection basket 441 and is connected to the water inlet side of the pretreatment chamber 400.

[0152] In application, the biologically treated water (water treated by the biological treatment chamber 500) enters the electrochemical treatment chamber 600 through the guide structure 102. First, the electrocoagulation electrode pair 610 (any one or a combination of iron-based and aluminum-based soluble anodes) is energized to generate iron ions or aluminum ions, which form insoluble flocs with phosphates and colloidal particles in the biologically treated water. The water flow after floc formation continues to the floc interceptor 630, which intercepts the flocs in the water, preventing them from entering the downstream electrochemical oxidation electrode pair 620 with the water flow. The flocs intercepted by the floc interceptor 630 are concentrated at the bottom of the floc interceptor 630 or in its sludge collection area and discharged through the sludge discharge channel 631.

[0153] The sludge discharge channel 631 can be connected to the backwash solids collection chamber 440 or to a separately installed sludge discharge container. When the sludge discharge channel 631 is connected to the backwash solids collection chamber 440, the floc-containing liquid enters the backwash solids collection chamber 440 through a one-way inlet. The one-way inlet only allows the floc-containing liquid to enter and will not flow back. Inside the backwash solids collection chamber 440, the removable solids collection basket 441 traps the flocs and other solids. The solids remain in the removable solids collection basket 441, while the liquid returns to the inlet side of the pretreatment chamber 400 through the return filter port. Maintenance personnel regularly remove and clean the removable solids collection basket 441.

[0154] The clarified water after being filtered by the floc interceptor 630 continues to enter the electrochemical oxidation electrode pair 620. The electrochemical oxidation electrode pair 620 directly or indirectly oxidizes the new organic pollutants such as antibiotics, veterinary drugs, hormones, and pesticides in the clarified water, causing the new organic pollutants to undergo oxidation or structural transformation, thus purifying the water.

[0155] The flocs generated by electrocoagulation are promptly intercepted and discharged to prevent them from entering the electrochemical oxidation electrode and contaminating the electrode surface of 620, thus reducing oxidation efficiency. At the same time, solid-liquid separation is achieved through a detachable solid collection basket 441 and a return filter port. Solids are periodically removed, and liquids are returned to the pretreatment chamber 400 for further processing, improving maintenance convenience.

[0156] Specifically, the electrocoagulation electrode pair 610 is any one or a combination of iron-based and aluminum-based soluble anodes; the electrochemical oxidation electrode pair 620 can use size-stable anodes, boron-doped diamond electrodes, metal oxide coated electrodes, or other proven electrodes to directly or indirectly oxidize applicable new organic pollutants; the two types of electrodes can be arranged sequentially along the flow direction or connected to the power supply in the same chamber at different times; both the electrocoagulation electrode pair 610 and the electrochemical oxidation electrode pair 620 adopt a modular frame that can be pulled out from the top cover.

[0157] Example 7:

[0158] The basic content is the same as in Embodiment 1, except that: the coarse interceptor 410 adopts a grid basket that can be pulled out from the top; the self-cleaning microporous filter 420 adopts a rotating cylindrical filter screen, and liquid level sensors are arranged on both sides of the rotating cylindrical filter screen; the liquid level sensors are electrically connected to the controller 800.

[0159] The backwash solid collection chamber 440 is equipped with a detachable solid collection basket 441; a return filter port is provided below the detachable solid collection basket 441, and the return filter port is connected to the upstream of the coarse interceptor 410.

[0160] During application, when the liquid level difference on both sides of the rotating cylindrical filter exceeds the clogging threshold, the controller 800 reduces the flow rate of the inlet pump 310 and starts the rotation of the cylindrical filter and the nozzle on the clean water side to flush the trapped material into the backwash solids collection chamber 440. In the backwash solids collection chamber 440, the trapped solids remain in the removable solids collection basket 441, and the backwash water returns to the upstream of the coarse interceptor 410 through the return filter port. During maintenance, the solids collection basket 441 is removed from the top of the treatment chamber 120, and the trapped solids are not directly discharged back into the pond.

[0161] The pretreatment chamber 400 can automatically maintain the filtration flux and actually remove the trapped solids, avoiding the backwashing material from re-entering the aquaculture water and reducing the risk of subsequent biofilm coverage, channel blockage and electrode contamination.

[0162] Example 8:

[0163] The basic content is the same as in Embodiment 1, except that: the power supply unit 200 includes a power management component 240, a photovoltaic power generation component 210, an energy storage component 220, and a shore power interface 230; the photovoltaic power generation component 210, the energy storage component 220, and the shore power interface 230 are electrically connected to the power management component 240, and the power management component 240 is used to supply power to the water inlet unit 300, the backwash component 430, the aeration component 520, the electrocoagulation electrode pair 610, the electrochemical oxidation electrode pair 620, the switching valve 730, the reflux control component 750, and the controller 800.

[0164] In application, the photovoltaic power generation module 210 in the power supply unit 200 generates electricity when there is sufficient sunlight, converting solar energy into electrical energy; the energy storage module 220 stores excess electrical energy when the power generation of the photovoltaic power generation module 210 exceeds the electrical energy required for equipment operation, and supplies power to the equipment when the power generation of the photovoltaic power generation module 210 is insufficient or at night; the shore power interface 230 connects to external power when there is available shore power; the electrical energy generated by the photovoltaic power generation module 210, the energy storage module 220, and the shore power interface 230 are all fed into the power management module 240;

[0165] The power management component 240 centrally manages and distributes the incoming power, supplying power to the water inlet unit 300, backwash component 430, aeration component 520, electrocoagulation electrode pair 610, electrochemical oxidation electrode pair 620, switching valve 730, reflux control component 750, and controller 800 respectively via DC bus or distribution box; the controller 800 obtains the available power information fed back by the power management component 240 in real time, and adjusts the operating status of each electrical component according to the available power of the power supply unit 200;

[0166] When the photovoltaic power generation module 210 generates sufficient power and the energy storage module 220 has a high energy level, the power management module 240 supplies power to all electrical components normally, and the controller 800 controls the equipment to operate continuously according to the set processing flow rate. When the photovoltaic power generation module 210 generates less power or the energy storage module 220 has a lower energy level, the controller 800, according to a three-level load scheduling strategy, prioritizes the power supply to basic loads such as the water quality safety sensor 710, the controller 800, the backwash module 430, and the aeration module 520, while the electrochemical oxidation electrode pair 620 stops or reduces its load. Simultaneously, the influent flow rate is reduced to prevent untreated water from being bypassed and discharged due to insufficient power supply; the energy storage component 220 releases electrical energy when the photovoltaic power generation component 210 generates insufficient power to maintain the basic operation of the equipment; the shore power interface 230 provides stable supplementary power to the equipment when it is on shore or when an external power source is connected; through the cooperation of the photovoltaic power generation component 210, the energy storage component 220, the shore power interface 230 and the power management component 240, the equipment can maintain the integrity of the water treatment chain under conditions of fluctuating sunlight or nighttime, reducing excessive energy storage and frequent start-stop.

[0167] The power supply unit 200 also includes a wind power generation component, which generates electricity when the wind conditions meet the power generation requirements, serving as a supplementary power source; the electrical energy generated by the wind power generation component can also be fed into the power management component 240, which centrally manages and distributes the fed-in electrical energy.

[0168] Example 9:

[0169] The basic content is the same as in Embodiment 1, except that: the floating support 100 includes multiple replaceable buoyancy modules and counterweight structures; the buoyancy modules are arranged around the processing cabin 120, and the counterweight structure is used to limit the roll and pitch of the processing cabin 120;

[0170] See Figure 8 The floating support 100 is fixed by an anchoring component 105, which includes a flexible anchor rope and a counterweight anchor block; the flexible anchor rope is reserved with a length that adapts to changes in the water level of the aquaculture water body.

[0171] The floating support 100 is provided with a shore guide, an elastic anti-collision component and a detachable maintenance tread on one side; the coarse interceptor 410, the detachable solid collection basket 441, the biofilm carrier 510, the electrocoagulation electrode pair 610 and the electrochemical oxidation electrode pair 620 can all be pulled out or lifted from the side of the maintenance tread; when it needs to be operated in the fixed tailrace channel, the treatment chamber 120 is installed on the shore frame, and the forced series flow path and safety gate relationship of the treatment chamber 120 remain unchanged.

[0172] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A floating aquaculture water body tiered and synergistic purification device for nutrients and new organic pollutants, characterized in that: The equipment includes a floating support (100), a processing chamber (120), a water inlet unit (300), a power supply unit (200), and a controller (800). The floating support (100) includes a buoyancy assembly (101) for supporting the processing compartment (120). The treatment chamber (120) includes a pretreatment chamber (400), a biological treatment chamber (500), an electrochemical treatment chamber (600), and a safety regulating chamber (700) arranged sequentially along the water flow direction; adjacent chambers are connected by a flow guiding structure (102) for guiding water to flow in one direction; an isolation structure (103) is also provided between adjacent chambers to prevent water from flowing back or bypassing between chambers. The pretreatment chamber (400) includes a coarse interceptor (410) and a self-cleaning microporous filter (420) arranged sequentially along the water flow direction; the self-cleaning microporous filter (420) is provided with a backwashing assembly (430) on the clean water side; the sewage discharge side of the backwashing assembly (430) is connected to the backwash solid collection chamber (440), and the backwash solid collection chamber (440) is isolated from the water flow path formed by the flow guiding structure (102); The biological treatment chamber (500) includes an aeration component (520) and a biofilm carrier (510), with the biofilm carrier (510) positioned above the aeration component (520); the electrochemical treatment chamber (600) includes an electrocoagulation electrode pair (610) and an electrochemical oxidation electrode pair (620) arranged sequentially along the water flow direction. The safety regulating chamber (700) includes a water quality safety sensor (710), a qualified water outlet (900), a switching valve (730), and a return channel (740); the switching valve (730) is connected to the qualified water outlet (900) and the return channel (740) respectively; the return channel (740) is selectively connected to the inlet side of the pretreatment chamber (400) or the inlet of the biological treatment chamber (500) through a return control component (750); the return control component (750) is used to provide return power and prevent backflow; The water inlet unit (300) includes an inlet end (301) and an outlet end (302). The inlet end (301) is located in the water intake area of ​​the aquaculture water body to be treated. The outlet end (302) is connected to the pretreatment chamber (400). The power supply unit (200) is used to supply power to the equipment; The controller (800) is electrically connected to the water quality safety sensor (710) and the switching valve (730) respectively. When the detection value of the water quality safety sensor (710) meets the safety conditions, the controller (800) controls the switching valve (730) to connect with the qualified water outlet (900). When the detection value of the water quality safety sensor (710) does not meet the safety conditions, the controller (800) controls the switching valve (730) to connect with the return channel (740). The controller (800) adjusts the operating status of the water inlet unit (300), backwash assembly (430), aeration assembly (520), electrocoagulation electrode pair (610), and electrochemical oxidation electrode pair (620) according to the blockage status of the pretreatment chamber (400) and the available power of the power supply unit (200).

2. The floating aquaculture water nutrient and organic pollutant graded synergistic purification equipment according to claim 1, characterized in that: The controller (800) determines the clogging status of the pretreatment chamber (400) based on the pressure difference or liquid level difference between the upstream and downstream of the self-cleaning microporous filter element (420). When the pressure difference or liquid level difference exceeds the clogging threshold, the controller (800) reduces or stops the water flow of the water inlet unit (300) and starts the backwash assembly (430) to backwash the self-cleaning microporous filter (420); After backwashing is completed, the controller (800) rereads the pressure difference or liquid level difference. When the pressure difference or liquid level difference returns to below the reset threshold, the controller (800) controls the water inlet unit (300) to resume water intake. Otherwise, the controller (800) controls the equipment to remain shut down and outputs a maintenance prompt.

3. The floating aquaculture water nutrient salt and organic new pollutant graded synergistic purification equipment according to claim 1, characterized in that: The controller (800) performs at least the following three levels of load scheduling based on the available electrical energy of the power supply unit (200): When the available electrical energy of the power supply unit (200) is not higher than the first threshold, the controller (800) controls the electrochemical oxidation electrode pair (620) to stop operating, and controls the water inlet unit (300), backwash assembly (430) and aeration assembly (520) to operate intermittently; When the available electrical energy of the power supply unit (200) is higher than the first threshold and not higher than the second threshold, the controller (800) controls the water inlet unit (300), backwash assembly (430) and aeration assembly (520) to operate continuously, and selectively operates the electrocoagulation electrode pair (610). When the available electrical energy of the power supply unit (200) is higher than the second threshold, the controller (800) controls the water inlet unit (300), aeration component (520), electrocoagulation electrode pair (610) and electrochemical oxidation electrode pair (620) to operate continuously according to the set treatment flow rate; The second threshold is higher than the first threshold.

4. The floating aquaculture water nutrient salt and organic pollutant graded synergistic purification equipment according to claim 1, characterized in that: The equipment also includes a buffer chamber (910) disposed between the biological treatment chamber (500) and the electrochemical treatment chamber (600); When the electrochemical treatment chamber (600) stops operating, the controller (800) controls the water inlet unit (300) to reduce the water inlet flow rate, and controls the water inlet unit (300) to stop water inlet when the liquid level in the buffer chamber (910) reaches the upper limit.

5. The floating aquaculture water nutrient and organic pollutant graded synergistic purification equipment according to claim 1, characterized in that: The safety regulating chamber (700) is equipped with a first detection position (701), a residual oxidant reduction component (720) and a second detection position (702) arranged sequentially along the water flow direction. The switching valve (730) is located at the end of the safety regulating chamber (700), and the qualified water outlet (900) and the return channel (740) are respectively connected to the water outlet side of the switching valve (730); The water quality safety sensor (710) is installed at the first detection position (701) and the second detection position (702).

6. The floating aquaculture water nutrient salt and organic new pollutant graded synergistic purification equipment according to claim 5, characterized in that: The water quality safety sensor (710) is any one or any combination of total residual chlorine sensor, free residual chlorine sensor, redox potential sensor, pH sensor, and conductivity sensor; The residual oxidant reduction component (720) is any one or any combination of activated carbon, reducing filter media, catalytic decomposition materials, and aeration removal components.

7. The floating aquaculture water nutrient salt and organic new pollutant graded synergistic purification equipment according to claim 1, characterized in that: The biological treatment chamber (500) also includes a flow guide baffle (501), which divides the biological treatment chamber (500) into an aeration zone (502) and a low-oxygen zone (503). The biofilm carrier (510) is distributed in the aeration zone (502) and the low oxygen zone (503); the aeration component (520) is located at the bottom of the aeration zone (502) and operates intermittently.

8. The floating aquaculture water nutrient salt and organic new pollutant graded synergistic purification equipment according to claim 1, characterized in that: The electrochemical treatment chamber (600) also includes a floc interception component (630) and a sludge discharge channel (631). The floc interceptor (630) is disposed between the electrocoagulation electrode pair (610) and the electrochemical oxidation electrode pair (620), and the sludge discharge channel (631) is connected to the backwash solid collection chamber (440) or an independently disposed sludge discharge container.

9. The floating aquaculture water nutrient salt and organic new pollutant graded synergistic purification equipment according to claim 1, characterized in that: The backwash solids collection chamber (440) includes a one-way inlet, a removable solids collection basket (441), and a return filter port; The one-way inlet allows only backwash fluid to enter; the return filter port is located downstream of the removable solid collection basket (441) and is connected to the water inlet side of the pretreatment chamber (400).

10. The floating aquaculture water nutrient and organic pollutant graded synergistic purification equipment according to claim 1, characterized in that: The power supply unit (200) includes a power management component (240), a photovoltaic power generation component (210), an energy storage component (220), and a shore power interface (230). The photovoltaic power generation module (210), energy storage module (220), and shore power interface (230) are electrically connected to the power management module (240), which is used to supply power to the water inlet unit (300), backwash module (430), aeration module (520), electrocoagulation electrode pair (610), electrochemical oxidation electrode pair (620), switching valve (730), reflux control module (750), and controller (800).

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