Method and system for synergistic purification of water bodies

Abstract

The application relates to the technical field of water body treatment for aquaculture, and discloses a water body cooperative purification method and system. Homologous target algae wrapped particles are subjected to integrity, disturbance and residence comparison, and a homologous instability re-release criterion is formed in combination with target algae cell activity; the particles are introduced into a receiving box through an independent receiving branch, a particle deposition area and a clear liquid sealing belt are formed, and a closed cycle is established between the upper part of the receiving box and a liquid phase buffer cavity and a plant root area; the instability state is determined according to the sequence of target algae cell appearance at multiple positions and the particle residence and sealing belt position; the closed cycle is paused before overall instability, the subsequent particles are switched to a second receiving box which is pre-charged and has completed pressure balance, and after the residual particles are settled, the first receiving box is sealed in the clear liquid sealing belt and is removed as a whole. The application can reduce the risk of active target algae re-release caused by the receiving, circulating and switching processes, and can maintain continuous water supply for filter-feeding of shellfish.

Description

Technical Field

[0001] This application relates to the field of aquaculture water treatment and ecological purification technology, and more specifically to a method and system for synergistic water purification. Background Technology

[0002] In aquaculture or ecological water bodies with high algal loads, filter-feeding shellfish can reduce the suspended algae content by filtering the water. After filter feeding, some algal cells, along with mucus, undigested matter, or excrement, form sedimentary particles. Compared to free algal cells, these particles are easier to separate from the operating water through sedimentation, thus allowing them to be combined with water purification units such as plant root zones and microbial treatments to form a multi-stage water treatment process.

[0003] However, the algae-containing particles expelled by shellfish do not maintain the same structural stability throughout the entire collection cycle. After entering the collection channel, being disturbed by the circulating backflow, undergoing a change in the collection box, or remaining there for an extended period, the encapsulation structure may gradually loosen, allowing the still-active target algal cells to re-enter the external liquid phase. If sediment is discharged only at fixed intervals, or if the need for cleaning is determined solely by the algal cell concentration at a single location, it is difficult to distinguish whether the changes in target algae originate from new input on the shellfish filter-feeding side, endogenous backflow from the particle deposition zone, or abnormal changes on the plant root zone's backflow side.

[0004] Meanwhile, when the particle receiving container needs to be replaced, directly connecting an empty container to the operating fluid path can easily lead to rapid liquid inflow, gas outflow, and pressure changes. If the sealing action occurs in the area through which the particles are still passing, it may also directly compress or disturb the particles. Simply keeping all circulating fluid paths running in order to maintain a continuous filter-feeding water supply for shellfish may also lead to the continued transmission of active fluid flow to the deposition area when the particles are close to instability. Therefore, it is necessary to establish a repeatable instability boundary for the target algae-encapsulated particles actually formed at the current shellfish farming location, and to establish a direct control relationship between this boundary and the particle receiving space, root zone circulation, source identification, and receiving box switching process. Summary of the Invention

[0005] The technical problem this application aims to solve is: addressing the inconsistencies in the stability of target algae-encapsulated particles formed at different times within the same shellfish farming location, and the potential for back-release of active target algae cells due to liquid flow during particle reception, plant root zone circulation, and receiving box switching. This application establishes an instability and back-release criterion corresponding to the current homologous particles. While retaining the upper liquid phase of the particles for plant root zone treatment, the application maintains the particle body on an independent receiving path, and completes subsequent particle switching, residual particle sedimentation, clear liquid area sealing, and overall removal of the first receiving box before the particles enter overall instability. The specific technical solution of this application is as follows: A method for synergistic water purification includes: Complete control, disturbance control and residence control were conducted on target algal encapsulated particles discharged from the same shellfish culture location at the same time. The disturbance and residence re-release conditions were determined in combination with the target algal cell activity to obtain the homologous instability re-release criteria. According to the homologous instability and release criterion, the target algae-encapsulated particles are introduced into the first receiving box through the first receiving branch separated from the shellfish filter feeding water supply path, forming a clear liquid sealing band covering the closed position above the particle deposition area, thus obtaining a layered receiving state. Based on the layered receiving state, a closed loop is established in the root zone between the liquid phase buffer chamber connected to the upper part of the first receiving box and the plant root zone, with the liquid taking and returning corresponding to the same liquid phase buffer chamber. The particle instability state is determined by combining the homologous instability back release criterion and the order of appearance of target algal cells. Based on the particle instability state, the closed loop of the root zone is paused before overall instability. The subsequent target algae-encapsulated particles are switched to the second receiving box with pre-filled liquid and pressure balance completed. After the remaining target algae-encapsulated particles in the first receiving branch settle, the first receiving box and its connecting channel are sealed by the clear liquid sealing strip, and the entire first receiving box is removed.

[0006] Specifically, the criteria for determining homologous instability include: Background water samples were collected from the shellfish farming locations, and the target algae-encapsulated particles discharged at the same time period were divided into a first control sample, a second control sample, and a third control sample. The first control sample was observed immediately under static conditions to obtain a complete reference state; the second control sample was subjected to lateral water flow disturbance, circulating return liquid disturbance, and receiving switching disturbance to obtain a disturbance return state; the third control sample was observed continuously under static conditions to obtain a residence return state. Based on the background water sample and the complete reference state, the background changes of the target algal cells are determined. Combining the perturbation back-release state, the residence back-release state, and the target algal cell activity, the perturbation back-release conditions and the residence back-release conditions are determined respectively, and the homologous instability back-release criterion is obtained.

[0007] Specifically, the hierarchical acceptance state is obtained based on the aforementioned homologous instability back-release criterion, including: Based on the disturbance release conditions and the falling trajectory of the target algae-encapsulated particles, the first receiving branch is separated from the shellfish filter feeding water supply path, forming a source-position receiving state. According to the source location receiving status, the target algae-encapsulated particles are introduced into the first receiving box, and the highest active position of the particle deposition area is determined according to the settling position of the target algae-encapsulated particles. The clear liquid sealing strip is formed according to the highest active position and the closed position of the first receiving box, and the upper part of the first receiving box is biased and connected to the liquid phase buffer chamber to obtain the layered receiving state.

[0008] Specifically, the clear liquid sealing strip is formed according to the highest active position and the closed position of the first receiving box, and the upper part of the first receiving box is offset and connected to the liquid phase buffer chamber, including: The highest active position of the particle deposition zone is determined based on the settling position of the target algae-encapsulated particles and the range of movement at the top after deposition. A clear liquid area is reserved above the highest active position to cover the closed position of the first receiving box and its connecting channel, forming the clear liquid sealing strip; Based on the position of the clear liquid sealing strip, the communication position between the first receiving box and the liquid phase buffer chamber is set above the clear liquid sealing strip, and the communication position is offset from the falling trajectory of the target algae-encapsulated particles.

[0009] Specifically, a root region closed loop is established based on the described layered bearing state, and the particle instability state is determined, including: Based on the layered receiving state, the mutually separated circulating liquid intake position and circulating liquid return position are determined in the liquid phase buffer chamber to obtain the liquid phase flow state; According to the liquid flow state, the liquid in the liquid buffer chamber is transported to the plant root zone, and the treated liquid is returned to the liquid buffer chamber through the circulation return position to obtain the closed loop of the root zone; The direction of the return liquid at the location of the circulating return liquid is adjusted according to the disturbance return conditions so that the return liquid avoids the particle deposition area, and the particle instability state is determined by combining the order of appearance of target algal cells at different locations.

[0010] Specifically, the unstable state of the particle is determined by combining the order in which target algal cells appear at different locations, including: The changes in target algal cells at the shellfish filter-feeding water supply path, above the particle deposition zone, at the circulating liquid intake position, and at the circulating liquid return position are obtained to obtain the first target algal state, the second target algal state, the third target algal state, and the fourth target algal state, respectively. The re-release source state is determined based on the order in which target algal cells appear in the first target algal state, the second target algal state, the third target algal state, and the fourth target algal state. When the first target algae state remains in the background state, and the target algae cells in the second target algae state appear before the third target algae state, the re-release source state is determined to be the endogenous re-release state. When the target algal cells in the first target algal state appear before the second target algal state, the re-release source state is determined to be an exogenous input state. When the target algal cells in the fourth target algal state appear before the third target algal state, and the second target algal state remains in the background state, the state of the backflow source is determined to be an abnormal state of root zone backflow. Based on the state of the re-release source, combined with the residence state of the target algae-encapsulated particles and the positional change of the clear liquid sealing strip, the unstable state of the particles is determined.

[0011] Specifically, based on the state of the re-release source, combined with the residence state of the target algae-encapsulated particles and the positional change of the clear liquid sealing strip, the unstable state of the particles is determined, including: Based on the residence status of the target algae-encapsulated particles that first enter the first receiving box and the residence and release conditions, the receiving and switching time point before the first release of the target algae cells is determined. The sealing protection status is determined based on the positional change between the highest active position of the particle deposition zone and the clear liquid sealing zone; When the receiving and switching point is reached, or when the sealing protection state indicates that the highest active position has reached the boundary of the clear liquid sealing strip, or when the release source state is the endogenous release state, the particle instability state is changed from the stable receiving state to the pre-removal state.

[0012] Specifically, pausing the closed loop in the root region and switching the subsequent target algae-encapsulated particles to the second receiving box includes: The closed loop in the root zone is paused based on the particle instability state, while the water supply path for the shellfish filter feeding remains connected, resulting in a liquid path isolation state. According to the liquid path isolation state, the clear liquid of the same origin as the liquid phase buffer chamber is pre-filled into the second receiving box, the gas in the second receiving box is discharged, and the second receiving box and the liquid phase buffer chamber are made to achieve pressure balance, so as to obtain an isobaric receiving state. Based on the isobaric receiving state, within the clear liquid interval between adjacent target algae-encapsulated particles, the subsequent target algae-encapsulated particles are switched to the second receiving box, thus obtaining the receiving switching state.

[0013] Specifically, the first receiving box and its connecting channel are sealed off respectively, and the first receiving box is removed as a whole, including: According to the receiving and switching state, the remaining target algae-encapsulated particles in the first receiving branch are allowed to settle into the particle deposition area, resulting in a particle-free sealing state. Based on the particle-free sealing state, the connecting channel and the first receiving box are closed sequentially within the clear liquid sealing strip to obtain a sealed receiving state; The first receiving box, which is in the sealed receiving state, is removed as a whole, and the root area closed loop is restored after the second receiving box forms a layered receiving state; The homologous instability re-release criterion is modified based on the integrity of the target algae-encapsulated particles in the first receiving box after removal.

[0014] A water body collaborative purification system for implementing the aforementioned water body collaborative purification method includes a source identification component, a source location receiving component, a root zone circulation component, and a receiving and switching component. The homology identification component performs complete control, disturbance control, and residence control on target algae-encapsulated particles discharged from the same shellfish farming location at the same time period, and determines the homology instability re-release criterion in combination with the target algae cell activity; The source receiving component includes a first receiving branch separated from the shellfish filter feeding water supply path, a connecting channel, and a first receiving box. The first receiving box is connected to the first receiving branch through the connecting channel, and a clear liquid sealing strip is formed above the particle deposition area of ​​the first receiving box to cover the closed position. The root zone circulation component includes a liquid phase buffer chamber and a plant root zone that are connected to the upper part of the first receiving box. The liquid phase buffer chamber and the plant root zone form a closed loop in the root zone where liquid intake and return correspond to the same liquid phase buffer chamber. The receiving and switching component is connected to the same source identification component and the root region circulation component, and includes a second receiving box, a diversion component, a first sealing component and a second sealing component. The diversion component is connected to the upstream of the first receiving branch and the second receiving box. The first sealing component and the second sealing component correspond to the sealing positions of the connection channel and the first receiving box, respectively. The receiving and switching component determines the particle instability state based on the homologous instability back-release criterion and the order of appearance of target algal cells, suspends the closed loop in the root zone, and switches the subsequent target algal-encapsulated particles to the second receiving box with pre-filled liquid and pressure balance through the diversion component. After the remaining target algal-encapsulated particles in the first receiving branch settle, the connecting channel and the first receiving box are sealed by the first sealing member and the second sealing member, respectively.

[0015] The beneficial effects of this application are as follows: Using target algae-encapsulated particles formed at the same time and location in the same shellfish aquaculture area for complete control, disturbance control, and residence control, and incorporating target algal cell activity into the effective reabsorption assessment, ensures that the stable boundaries corresponding to lateral water flow, circulating return, receiving switching, and continuous residence all originate from the actual state of the current homologous particles. By separating the particle receiving path from the shellfish filter-feeding water supply path, a particle deposition zone and a clear liquid sealing zone covering the closed position are formed within the first receiving box, and the upper liquid phase and liquid phase buffer chamber are offset and connected, allowing root zone circulation to operate without directly impacting the particle deposition zone. The order of appearance of target algal cells in the shellfish filter-feeding water supply path, above the particle deposition zone, at the circulating liquid intake position, and at the circulating return position is further used to distinguish between endogenous reabsorption, exogenous input, and abnormal root zone return, reducing misjudgment of the source caused by single concentration changes. When any of the following conditions—retention time, sealing protection space, or source of target algae propagation—indicates that the first receiving box needs to be pre-removed, the root zone closed loop is paused first. The second receiving box is pre-filled with the same source of clear liquid and completes venting and pressure balancing. The receiving switch is completed within the clear liquid interval between adjacent target algae-encapsulated particles. After the residual particles in the first receiving branch have settled, the connecting channel and the first receiving box are sequentially sealed within the clear liquid sealing zone and removed as a whole. This can maintain the continuous water supply for shellfish filter feeding, reduce the direct disturbance of particles caused by the additional liquid flow and sealing action generated by the receiving box replacement, and use the actual integrity of the removed particles to make boundary corrections to the subsequent same-source instability back-release criteria. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall process of the water synergistic purification method in the embodiments of this application; Figure 2 This is a schematic diagram of the identification process for homologous target algae-encapsulated particles in the embodiments of this application; Figure 3 This is a schematic diagram of the layered receiving process of the shellfish filter feeding water supply path, the first receiving branch, the first receiving box, the clear liquid sealing strip, and the liquid phase buffer chamber in the embodiments of this application; Figure 4 This is a schematic diagram of the root zone closed loop and the process of identifying the source of target algae state at different locations in an embodiment of this application. Figure 5 This is a schematic diagram illustrating the switching, closing, and overall removal of the first and second receiving boxes in an embodiment of this application. Detailed Implementation

[0017] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0019] Hereinafter, the terms "first," "second," and other generic terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0020] Example 1 This embodiment provides a method for synergistic water purification. See also... Figure 1 The method forms a continuous processing main chain according to S101 to S104. The method uses target algae-encapsulated particles formed after shellfish filter feeding as the main receiving object. While maintaining the continuity of the shellfish filter feeding water supply path, the method constrains particle receiving, liquid phase circulation in the plant root zone, and the switching and removal process between the first receiving box and the second receiving box through the homologous instability back release criterion.

[0021] In this embodiment, target algae refers to algae identified based on the current algal composition in the aquaculture water and tracked and identified as the target of this purification. A consistent target algae identification caliber is used during the same operational phase to ensure comparability of changes in target algal cells obtained from different detection locations. Target algae-encapsulated particles refer to particles excreted by shellfish after filtering water containing target algal cells, which contain target algal cells internally or in an encapsulating structure and are capable of independent settling motion in still water.

[0022] In actual identification, confirmation is based on particle outline, continuous sedimentation state, and the detection results of target algae within the particle, distinguishing the target algae-encapsulated particle from free target algae cells and ordinary fine suspended matter. Releasing refers to the process by which target algae cells, originally confined by the internal structure of the target algae-encapsulated particle, leave the original particle and enter the liquid phase outside the particle. Effective releasing is a state where, based on confirmation that the detected object belongs to the target algae cell, the changes in the target algae cells in the liquid phase outside the particle continuously exceed the current background changes, and the corresponding target algae cells meet the activity determination criteria. If the particle only experiences positional fluctuations, slight edge changes, or a single abnormal detection, effective releasing is not determined solely based on these factors. Target algae cell identification can employ optical imaging, flow-through detection, or other detection methods capable of distinguishing target algae cells. Target algae cell activity is confirmed using detection results that distinguish it from the target algae identification.

[0023] As an optional implementation method, after confirming that the detected object belongs to the target algal cell, activity can be confirmed by live / dead staining, short-term resuscitation culture, or detection methods that reflect cell membrane integrity or resuscitation ability; chlorophyll fluorescence results can be used as auxiliary information, but a single fluorescence signal amplitude is not directly equivalent to the activity of the target algal cell. Therefore, the confirmation of effective re-release is based on three aspects: target algal identity, continuous variation beyond background, and active state. A shellfish filter-feeding water supply path is provided at the shellfish aquaculture location, and the water to be treated enters the shellfish area along this path. Target algal particles formed after shellfish filter feeding move downwards from the particle discharge area. A first receiving branch is set up corresponding to the particle discharge area. The first receiving branch is separated from the shellfish filter-feeding water supply path and connected to the first receiving box through a connecting channel. The upper part of the first receiving box is connected to the liquid phase buffer chamber, which is connected to the plant root zone through a circulating liquid intake path and a circulating liquid return path. A receiving switching position is provided upstream of the first receiving branch, where subsequent target algal particles can switch from the path corresponding to the first receiving box to the path corresponding to the second receiving box.

[0024] The method includes steps S101 to S104. S101 establishes the instability and release boundary of the target algae-encapsulated particles; S102 uses the boundary to establish a layered receiving state separating the water supply path and the particle receiving path; S103 establishes a closed loop in the root zone under the layered receiving state, and determines the particle instability state by combining the propagation sequence of the target algae cells at different locations; S104 suspends the closed loop in the root zone before the particles become completely unstable, and completes the access of the second receiving box, subsequent particle switching, residual particle sedimentation, and the closure and overall removal of the first receiving box.

[0025] S101. Complete control, disturbance control and residence control were conducted on the target algae-encapsulated particles discharged from the same shellfish culture location at the same time period. The disturbance and residence conditions were determined in combination with the target algae cell activity to obtain the homologous instability release criteria.

[0026] See Figure 2 Target algal particles obtained from the same shellfish culture location and time period were divided into intact control, disturbed control, and stationary control. Background water samples were used to form background variation. The results of the three types of controls, together with the target algal cell activity, were used to form the homologous instability back-release criterion. S101 includes S201 to S203.

[0027] S201. Collect background water samples from the shellfish farming location and divide the target algae-encapsulated particles discharged at the same time period into a first control sample, a second control sample, and a third control sample.

[0028] Background water samples were obtained from locations that characterize the current water supply background of the shellfish farming site and are not directly affected by the discharged target algae-encapsulated particles. During sampling, the shellfish filter-feeding water supply path was kept operational without any changes in operating conditions, and the target algae detection results in the background water samples were continuously obtained. These background water samples provide a basis for changes in external target algae during the current time period, allowing subsequent changes in target algae in the external liquid phase to be distinguished from the fluctuations in the current water body itself. Target algae-encapsulated particles discharged from the same shellfish farming location during the same time period were divided into a first control sample, a second control sample, and a third control sample.

[0029] In this embodiment, the same time period refers to a continuous collection period during which the main operating conditions of the shellfish filter-feeding water supply, the target algae input, and the shellfish farming location do not change. Before grouping, the three groups of samples followed the same particle collection path, without being subjected to compression, dehydration, or high-speed suction, to maintain a common source basis. When the particle size distribution is relatively concentrated, grouping can be based on particle quantity; when the particle size difference is large, grouping can be based on particle wet mass or the overall particle size under uniform imaging conditions. The purpose of grouping is to ensure that the three groups of samples have similar particle loads, without requiring that the particles in each group be completely identical in geometric size. This results in three control samples under the same source conditions.

[0030] S202. The first control sample is observed immediately under static conditions to obtain a complete reference state; the second control sample is subjected to lateral water flow disturbance, circulating return liquid disturbance and receiving switching disturbance to obtain a disturbance return state; the third control sample is observed continuously under static conditions to obtain a residence return state.

[0031] After obtaining the first control sample, it was placed in a liquid environment corresponding to the background water sample for immediate static observation, without applying lateral water flow, circulating backflow, or active liquid flow generated by switching. The particle outline, edge continuity, and changes in target algal cells in the liquid phase outside the particles were recorded, and the corresponding target algal cell activity detection results were obtained simultaneously. The particle morphology and changes in the target algae in the liquid phase outside the particles obtained during the immediate static observation phase were defined as the complete reference state. The second control sample was used to form a disturbed back-release state.

[0032] As an optional implementation, the second control sample can be further divided into subsamples from the same source, so that lateral water flow disturbance, circulation return disturbance, and receiving switching disturbance are applied to different subsamples respectively, avoiding the influence of the previous disturbance on the judgment of the subsequent disturbance after the previous disturbance has changed the particle state. The lateral water flow disturbance is applied from the side of the target algae surrounding the particle, and the disturbance intensity is gradually increased from a lower liquid flow state. The particle position, outline, and changes in the target algal cells in the liquid phase outside the particle are recorded under each disturbance state. The range of lateral water flow variation corresponds to the liquid flow state that may actually be formed in the first receiving branch, and is used to determine the allowable lateral liquid flow range when the particle moves along the receiving path.

[0033] The circulation return perturbation was established based on the actual arrangement of the circulation return liquid positions in the subsequent root zone closed loop. By changing the return liquid flow rate or direction, different degrees of perturbation were generated in the particle region, from low to high, and the activity at the top of the particles and the changes in the target algal cells in the liquid phase outside the particles were recorded. This control provides a basis for setting the direction and state of the subsequent circulation return liquid.

[0034] The switching disturbance was simulated by establishing a liquid path based on the potential liquid level or pressure difference during the switching between the first and second receiving boxes. Flow path switching was implemented under different liquid phase conditions, and the particle position, structural loosening, and changes in the target algal cells in the liquid phase outside the particles were recorded before and after the switching. The disturbance states were correlated with the corresponding particle and liquid phase changes and saved to obtain the disturbance return state. The third control sample was placed in a static environment corresponding to the liquid conditions of the first receiving box and remained there continuously. After the target algae-encapsulated particles completed their main sedimentation, the residence state was recorded, and the changes in the target algal cells in the liquid phase outside the particles and their corresponding activity state were obtained according to a fixed sampling rhythm to obtain the residence return state.

[0035] S203. Determine the background changes of the target algal cells based on the background water sample and the complete reference state. Combine the perturbation back-release state, the residence back-release state and the target algal cell activity to determine the perturbation back-release conditions and the residence back-release conditions respectively, and obtain the homologous instability back-release criterion.

[0036] To ensure a repeatable formation process for disturbance back-release conditions, each disturbance level is set progressively according to the flow state corresponding to the actual operating liquid path. When using independent subsamples from the same source for graded control, each subsample is subjected to a corresponding disturbance level under the same initial liquid conditions. When using the same sample to progressively increase the disturbance, the next disturbance level is only introduced if the previous disturbance level has not resulted in effective back-release. Each disturbance level is maintained until the corresponding liquid flow has reached the particle observation area and the target algae detection results cover the complete stable detection window before confirming whether effective back-release has occurred at that level. If, in two adjacent disturbance levels, the previous level has not resulted in effective back-release while the subsequent level has, the previously verified stable state is used as the operational allowable boundary for this type of disturbance, and the subsequent level is used as the instability reference outside the boundary.

[0037] Background variation is determined based on the natural changes in target algae in the background water sample and the stable changes in target algae observed immediately upon settling in the first control sample. Background variation is used to exclude the influence of natural fluctuations on the water supply side, minor natural particle shedding, and detection fluctuations on the re-release judgment. A single abnormal result does not directly change the range of background variation. For perturbation re-release states, when the changes in target algal cells in the liquid phase outside the particles consistently exceed the background variation under a certain perturbation state, and the target algal cells within meet the activity determination criteria, this perturbation state is determined as a valid perturbation re-release state.

[0038] As an optional implementation, the persistence of the target algae detection results can be confirmed when they remain outside the background variation range for multiple consecutive sampling cycles. Following the hierarchical order of lateral water flow disturbance, circulating return liquid disturbance, and receiving switching disturbance, the transition region between the disturbance state where particles remain stable and the disturbance state where effective backflow begins to form is determined. The stable state range before this transition region is taken as the corresponding disturbance backflow condition. The disturbance backflow condition corresponding to lateral water flow enters the particle introduction process in S102; the disturbance backflow condition corresponding to circulating return liquid enters the root zone closed loop in S103; and the disturbance backflow condition corresponding to receiving switching enters the second receiving box pressure balancing and diversion process in S104.

[0039] For the retention and release state, when the changes in the target algal cells in the liquid phase outside the particle begin to consistently exceed the background changes after the particle has been retained for a long time, and the corresponding target algal cells meet the activity determination conditions, the effective retention and release start stage is determined. When there are multiple third control samples, the sample that enters the stable and effective release state earlier is used as the basis for the retention control of the current homologous particle, and the retention and release conditions are obtained. The background changes, effective release confirmation conditions, lateral water flow disturbance release conditions, circulation return liquid disturbance release conditions, receiving and switching disturbance release conditions, and retention and release conditions are correlated into the current homologous unstable release criterion. This criterion is formed by the homologous target algae encapsulating the particle at the current time of the current shellfish farming location, and does not call fixed rules lacking calibration sources. The criterion enters S102 to S104, respectively constraining particle receiving, root zone closed circulation, and receiving and switching.

[0040] S102. According to the homologous instability release criterion, the target algae-encapsulated particles are introduced into the first receiving box through the first receiving branch separated from the shellfish filter feeding water supply path, forming a clear liquid sealing band covering the closed position above the particle deposition area, thus obtaining a layered receiving state.

[0041] See Figure 3The shellfish filter-feeding water supply path and the first receiving branch are spatially and functionally separated. The target algae-encapsulated particles enter the first receiving branch along their natural falling trajectory and then enter the first receiving box through the connecting channel. Inside the first receiving box, a particle deposition zone, a highest activity position, and a clear liquid sealing zone covering the closed position are formed. Its upper part is connected to the liquid phase buffer chamber through a position deviating from the particle falling trajectory. S102 includes S301 to S303, wherein S303 further includes S401 to S403.

[0042] S301. Based on the disturbance release conditions and the falling trajectory of the target algae-encapsulated particles, the first receiving branch is separated from the shellfish filter feeding water supply path to form a source-position receiving state.

[0043] Under the condition that the shellfish filter-feeding water supply is maintained, the natural falling trajectory of the target algae-encapsulated particles after being discharged from the shellfish farming location is detected.

[0044] As an optional implementation, a fixed imaging device is installed to the side of the particle discharge area to determine the main fall area based on the positions of multiple target algae-encased particles. The inlet of the first receiving branch is located corresponding to the main fall area and is separated from the shellfish filter-feeding water supply path. This separation means that the first receiving branch does not constitute a necessary liquid path for the filter-feeding water to enter the area where the shellfish are located; the shellfish filter-feeding water supply continues along the original water supply path, while the target algae-encased particles discharged after shellfish filter-feeding enter an independent particle receiving path.

[0045] As an optional implementation, a gentle slope or tapering particle guiding structure is provided between the particle falling area and the inlet of the first receiving branch, allowing the target algae-encapsulated particles to enter the first receiving branch through their own sedimentation and low-velocity liquid flow. The liquid flow state during the particle introduction process remains within the stable range of lateral water flow disturbance obtained in S203, thereby forming a source-site receiving state.

[0046] S302. Based on the source location receiving status, the target algae-encapsulated particles are introduced into the first receiving box, and the highest active position of the particle deposition zone is determined based on the settling position of the target algae-encapsulated particles.

[0047] The target algae-encapsulated particles, in their source-site receiving state, enter the first receiving box along the first receiving branch and connecting channel, and settle to the bottom of the first receiving box by their own gravity. The continuously entering target algae-encapsulated particles form a particle deposition zone at the bottom of the first receiving box. The particle body remains in the particle deposition zone, while the upper liquid phase is connected to the liquid phase buffer chamber. The upper liquid phase of the first receiving box enters the plant root zone for treatment in S103 via the liquid phase buffer chamber, while the target algae-encapsulated particles remain in the particle deposition zone and do not directly enter the root zone closed loop, thus separating the particle receiving path from the root zone liquid phase treatment path.

[0048] S303. The clear liquid sealing strip is formed according to the highest active position and the closed position of the first receiving box, and the upper part of the first receiving box is biased and connected to the liquid phase buffer cavity to obtain the layered receiving state; the clear liquid sealing strip is formed and biased connection with the liquid phase buffer cavity is established.

[0049] S401. Determine the highest active position of the particle deposition zone based on the settling position of the target algae-encapsulated particles and the range of movement at the top after deposition.

[0050] An observation area is set up on the side of the first receiving box to observe the particle deposition state, and a vertical position reference is established with the first receiving box as a fixed structure. After the target algae-encapsulated particles enter the first receiving box, particle images are continuously acquired; particles that continue to move downwards are regarded as falling particles, and particles that enter the lower part of the first receiving box and form a stable or basically stable concentrated area with the already deposited particles are regarded as part of the particle deposition zone.

[0051] During the initial stratified deposition process of the current deposition cycle, the activity range at the top of the particle deposition zone caused by the influx of new particles, particle rearrangement, and normal liquid flow is recorded. The highest position actually reached within this activity range is determined as the initial highest activity position. Before a continuous deposition layer is formed, the upper boundary of the highest particle among the target algae-encased particles that have completed major settling can be taken as the current highest activity position. After entering the continuous deposition phase, the highest activity position is updated according to the same positional benchmark.

[0052] S402. Above the highest active position, a clear liquid area is reserved to cover the closed position of the first receiving box and its connecting channel, forming the clear liquid sealing strip.

[0053] Based on the highest active position determined when establishing the layered receiving state in the current receiving cycle, a continuous clear liquid area is maintained above it, and the closed positions of the first receiving box and the connecting channel are both located within this clear liquid area. The side of the clear liquid sealing zone closest to the particle deposition zone forms the clear liquid sealing zone boundary for the current receiving cycle, and this boundary serves as a spatial reference for subsequent sealing protection status judgment.

[0054] The clear liquid sealing strip does not require the absence of any free target algal cells, micro-suspended matter, or dissolved matter in the liquid. However, it requires that the target algal encapsulated particles do not continuously occupy the closed operating area of ​​the first receiving box and connecting channel. After the first receiving box continuously receives the target algal encapsulated particles, its highest active position can gradually change upwards. However, the boundary of the clear liquid sealing strip in the current receiving cycle does not move upwards synchronously with the highest active position, so that S702 can determine the sealing protection status based on the actual positional change between the two.

[0055] S403. Based on the position of the clear liquid sealing strip, the communication position between the first receiving box and the liquid phase buffer chamber is set above the clear liquid sealing strip, and the communication position is offset from the falling trajectory of the target algae-encapsulated particles; an offset communication is established between the first receiving box and the liquid phase buffer chamber.

[0056] A liquid connection point is set above the clear liquid sealing strip between the first receiving box and the liquid phase buffer chamber. The liquid connection point is spatially offset from the main falling trajectory of the target algae-encapsulated particles after entering the first receiving box through the connecting channel, and its opening direction does not directly point to the particle deposition area.

[0057] As an optional implementation, when the target algae-encapsulated particles mainly sink downward from the upper middle area of ​​the first receiving box, the liquid connection position can be set on the upper side of the first receiving box so that it is staggered from the main falling area of ​​the particles in the horizontal direction; a slow flow area with a larger cross section can also be formed on the side of the liquid connection position close to the first receiving box so that the liquid entering the liquid phase buffer chamber first passes through the upper clear liquid space.

[0058] After processing in steps S301 to S403, the shellfish filter-feeding water supply path and the particle receiving path are separated. A particle deposition zone is formed at the bottom of the first receiving box, and a clear liquid sealing zone is formed above the particle deposition zone, covering the closed position. The clear liquid sealing zone is connected to the liquid phase buffer chamber at a position deviating from the main falling trajectory of the particles, resulting in a stratified receiving state. This state serves as the input for step S103 to determine the circulation liquid intake position, circulation liquid return position, and the closed circulation liquid path in the root zone.

[0059] S103. Based on the layered receiving state, establish a closed loop in the root zone between the liquid phase buffer chamber connected to the upper part of the first receiving box and the plant root zone, with the liquid taking and returning corresponding to the same liquid phase buffer chamber. Combine the homologous instability back release criterion and the order of appearance of target algal cells to determine the particle instability state.

[0060] See Figure 4 A closed loop is formed between the liquid-phase buffer chamber and the plant root zone, with the liquid intake and return corresponding to the same liquid-phase buffer chamber. The water supply path for shellfish filter feeding, the area above the particle deposition zone, the liquid intake position, and the liquid return position correspond to the first to fourth target algal states, respectively. The state of the return source is determined by comparing the appearance sequence of target algal cells at each location, and the particle instability state is determined by combining the particle residence state and the change in the position of the clear liquid sealing zone. S103 includes S501 to S503, wherein the process of determining the particle instability state includes S601 to S703.

[0061] S501. Based on the layered receiving state, determine the mutually separated circulating liquid intake position and circulating liquid return position in the liquid phase buffer chamber to obtain the liquid phase flow state.

[0062] Based on the stratified receiving state, separate circulating liquid intake and circulating liquid return positions are set up within the liquid phase buffer chamber. The circulating liquid intake position serves as the inlet for the liquid to leave the liquid phase buffer chamber and enter the plant root zone, while the circulating liquid return position serves as the outlet for the liquid treated in the plant root zone to return to the liquid phase buffer chamber.

[0063] A liquid buffer space is maintained between the liquid collection position and the liquid connection position of the first receiving box, and a spatial distance is maintained between the liquid return position and the liquid collection position. This allows the returned liquid to undergo a liquid phase propagation process within the buffer chamber after entering the liquid phase buffer chamber, rather than directly forming a short-circuit flow path from the return position to the collection position. This results in the liquid phase flow state used to establish a closed loop in the root region.

[0064] S502. According to the liquid phase flow state, the liquid in the liquid phase buffer chamber is transported to the plant root zone, and the treated liquid is returned to the liquid phase buffer chamber through the circulation return position to obtain the closed loop of the root zone; establish the closed loop of the root zone.

[0065] The liquid intake point is connected to the inlet side of the plant root zone via the liquid intake path, and the liquid outlet side of the plant root zone is connected to the liquid return point via the liquid return path. Liquid in the liquid phase buffer chamber enters the plant root zone from the liquid intake point, contacts the plant root system, and then returns to the same liquid phase buffer chamber. The liquid treated in the plant root zone does not directly enter the shellfish filter feeding water supply path, nor does it directly return to the particle deposition area of ​​the first receiving box.

[0066] Therefore, the liquid phase in the upper part of the first receiving box can enter the plant root zone for treatment through the liquid phase buffer chamber, while the target algae-encapsulated particles remain in the particle deposition zone and do not enter the plant root zone through the closed loop. The closed loop in the root zone describes the circulation relationship of the liquid phase between the liquid phase buffer chamber and the plant root zone, and does not mean that the plant root zone is completely isolated from the outside air.

[0067] S503. Adjust the return direction of the circulating return liquid position according to the disturbance return conditions so that the return liquid avoids the particle deposition area, and determine the particle instability state by combining the order of appearance of target algal cells at different positions.

[0068] The circulation return state is set according to the circulation return disturbance and release conditions formed by S203. The main return direction of the circulation return position avoids the direction of the particle deposition zone corresponding to the position where the first receiving box and the liquid phase buffer chamber are connected, so that the return liquid does not form a continuous concentrated liquid flow toward the particle deposition zone.

[0069] During operation, when the activity at the top of the particles approaches the stable boundary in the control group of homologous circulating return liquid disturbance, the flow rate of the return liquid is reduced or the direction of return liquid is adjusted to keep the actual return liquid state within the range where no effective return release occurs. Under the above circulation state, changes in target algal cells were obtained at the shellfish filter feeding water supply path, above the particle deposition area, at the circulation liquid intake position, and at the circulation return liquid position. The source of the target algal changes was determined according to their order of appearance. This, combined with the particle residence state and the position changes of the clear liquid sealing zone, constitutes the particle instability state.

[0070] S601. Obtain the changes in target algal cells at the water supply path of the shellfish filter feeder, above the particle deposition zone, at the liquid collection location and the liquid return location, and obtain the first target algal state, the second target algal state, the third target algal state and the fourth target algal state, respectively.

[0071] Changes in target algal cells were observed along the water supply path for shellfish filter feeding, forming the first target algal state; changes in target algal cells were observed above the particle deposition zone, forming the second target algal state; changes in target algal cells were observed at the liquid collection point, forming the third target algal state; and changes in target algal cells were observed at the liquid return point, forming the fourth target algal state.

[0072] The four states correspond to the external water supply side, the upper liquid phase of the particle deposition zone, the liquid intake side of the liquid phase buffer chamber, and the liquid return side of the plant root zone, respectively. A unified time reference is used for all four detection locations. When the detection devices have a fixed response delay, the fixed response difference between each detection device is obtained using the same target algae sample and then corrected. If a single abnormal detection result occurs at a certain location, it is not directly recorded as the appearance of target algal cells; if the detection result continuously exceeds the corresponding background change, the correction time corresponding to the start of the continuous change is taken as the appearance time of the target algal cells at that location.

[0073] S602. Determine the re-release source state according to the order in which the target algal cells appear in the first target algal state, the second target algal state, the third target algal state, and the fourth target algal state.

[0074] Before comparing the order of appearance of target algal cells at different locations, a liquid phase propagation reference corresponding to the current closed-loop state of the root zone is obtained. This liquid phase propagation reference reflects the normal propagation time range required for a target change to travel from one detection location along a predetermined liquid path to an adjacent downstream detection location. It is determined based on the effective liquid path volume between corresponding detection locations, the current circulation flow state, and the liquid phase transfer response obtained during system commissioning. When the operating flow rate or liquid path connection state changes, a new liquid phase propagation reference corresponding to the current operating condition is obtained. The comparison of the appearance times at different detection locations considers both the fixed response difference of the detection device and the propagation time of the corresponding liquid path. When the time difference between two locations is within a range where the current detection resolution and the liquid phase propagation reference cannot reliably distinguish the propagation direction, the source state is not updated accordingly, and subsequent detection results continue to be obtained.

[0075] The propagation direction of the target algal cell change is determined by comparing the appearance times of target algal cells from the first to the fourth target algal state, and combining the spatial relationship of the four detection locations in the actual liquid path, the fixed response difference of the detection device, and the current liquid phase propagation benchmark. If two or more locations cannot be distinguished in sequence under the current sampling resolution and liquid phase propagation benchmark, the previous valid re-release source state is maintained and detection continues. When conflicting combinations pointing to different sources appear in the same observation stage, the source state is not changed based on the result of a single conflict; the propagation process is continued until a clear source determination can be formed. Therefore, the order of appearance is based on a corrected time relationship that reflects the actual liquid path propagation direction, rather than directly determining the source based on an uncorrected single sampling time.

[0076] S603. When the first target algae state remains in the background state, and the target algae cells in the second target algae state appear before the third target algae state, the re-release source state is determined to be the endogenous re-release state.

[0077] When the first target algae state remains in the background state, the target algae cells in the second target algae state appear before the third target algae state, and the changes in the target algae in the second target algae state meet the conditions for effective back-release confirmation, it is determined that the changes in the target algae propagate from the particle deposition area to the circulating liquid sampling location, and the back-release source state is determined as the endogenous back-release state.

[0078] S604. When the target algal cells in the first target algal state appear before the second target algal state, the re-release source state is determined to be an exogenous input state.

[0079] When the target algal cells in the first target algal state appear before the second target algal state, the change in the target algae propagates from the shellfish filter-feeding water supply side to subsequent areas, and the state of re-release source is determined as the exogenous input state. The exogenous input state is used to eliminate the interference of new inputs from the water supply side on the judgment of the endogenous re-release of particles, and does not separately indicate that the target algae-encapsulated particles in the first receiving box have become unstable.

[0080] S605. When the target algal cells in the fourth target algal state appear before the third target algal state, and the second target algal state remains in the background state, the state of the backflow source is determined to be an abnormal state of root zone backflow.

[0081] When the target algal cells in the fourth target algal state appear before the third target algal state, and the second target algal state remains in the background state, the change in the target algae enters the liquid phase buffer chamber from the reflux side of the plant root zone, identifying the reflux source state as the abnormal reflux state of the root zone. This state indicates that the propagation source of the target algal change points to the reflux side of the root zone, without limiting the occurrence of a specific mechanical failure or biological state change in the plant root zone.

[0082] S606. Based on the state of the re-release source, combined with the residence state of the target algae-encapsulated particles and the positional change of the clear liquid sealing strip, determine the unstable state of the particles.

[0083] The system obtains the status of the backflow source, as well as the residence status of the target algae-encapsulated particles that entered the first receiving box earliest in the current receiving cycle, and the positional change of the highest activity position in the particle deposition area relative to the boundary of the clear liquid sealing zone. The external input status and the abnormal status of the root zone backflow are not used as triggering conditions for the pre-removal of the first receiving box; the internal backflow status serves as source information directly related to the stability of the target algae-encapsulated particles within the first receiving box.

[0084] S701. Based on the residence status of the target algae-encapsulated particles that first enter the first receiving box and the residence and release conditions, determine the receiving and switching time point before the first release of the target algae cells.

[0085] After the new settling cycle begins, the target algae-encapsulated particles that entered the first settling box earliest are identified based on their state. The entry order is determined by the time the particles enter the first settling box, and the residence state adopts the same timing caliber as the third control sample S202, that is, the state of the particle after completing the main settling is used as the basis for residence time.

[0086] The actual residence state of the particle is compared with the residence and release conditions obtained in S203, and the normal processing time required for the system to complete the root zone closed-loop pause, pre-filling of the second receiving box and pressure balancing, and receiving path switching is obtained. An operational margin sufficient to cover the above processing steps is reserved before the first effective residence and release of the particle encapsulated by the homologous target algae, and the receiving switching time is determined. This time point represents the time boundary for initiating the pre-removal treatment, not the moment when the second receiving box has already completed its actual switching.

[0087] S702. Determine the sealing protection status based on the positional change between the highest active position of the particle deposition zone and the clear liquid sealing zone.

[0088] The normal processing time is obtained according to the actual execution chain before the system is put into operation. When no target algae-encapsulated particles pass through the receiving and switching position, the following actions are executed sequentially: root zone closed-loop pause, second receiving box pre-filling and venting, pressure balancing, and complete switching of the diversion component. The duration from the issuance of the pre-removal processing command to the completion of the corresponding receiving path of the second receiving box is recorded, and the processing time sufficient to cover the normal fluctuations of each execution action is used as the operational margin for the receiving and switching point. During operation, if the second receiving box pre-filling, venting, pressure balancing, or diversion action is not completed within the confirmed normal processing state, the next switching action is not executed; the currently established liquid path isolation state is maintained, and the corresponding preceding state is continuously confirmed.

[0089] The highest active position in the particle deposition zone is continuously updated and compared with the clear liquid sealing zone boundary determined when the current receiving cycle forms a stratified receiving state. If the highest active position remains below the clear liquid sealing zone boundary, and normal space for particle top movement is still maintained between them, the sealing protection status indicates that the subsequent sealing operation area remains separated from the particle deposition zone. As particles continue to deposit, the highest active position moves towards the clear liquid sealing zone boundary. The clear liquid sealing zone boundary for the current receiving cycle remains as a predetermined spatial reference. When continuous monitoring confirms that the highest active position has reached this boundary, the sealing protection status indicates that the clear liquid space originally reserved for the sealing operation of the first receiving box and connecting channel has been intruded by the particle deposition zone.

[0090] S703. When the receiving and switching point is reached, or when the sealing protection state indicates that the highest active position has reached the boundary of the clear liquid sealing strip, or when the release source state is the endogenous release state, the particle instability state is changed from the stable receiving state to the pre-removal state.

[0091] Specifically, the highest active position is compared with the boundary of the clear liquid sealing zone using the same vertical position reference used when the initial highest active position was formed. When the boundary positioning of the particle image has a limited resolution range, a positioning resolution area corresponding to the boundary of the clear liquid sealing zone is used as the arrival determination area; the highest active position is confirmed to have reached the boundary of the clear liquid sealing zone only when it enters this determination area or crosses the boundary within the continuous detection window. The floating of isolated particles, imaging noise, or instantaneous position jumps in a single frame image do not trigger the sealing protection state transition independently.

[0092] Currently, if the receiving and switching point has not yet been reached, the highest active position has not yet reached the boundary of the clear liquid sealing zone, and the return source state has not yet been determined to be an endogenous return state, the particle instability state remains in a stable receiving state. When any of the following conditions are met: the receiving and switching point is reached, the highest active position reaches the boundary of the clear liquid sealing zone, or the return source state is determined to be an endogenous return state, the particle instability state is changed from a stable receiving state to a pre-removal state. The pre-removal state indicates that the first receiving box has met the conditions for initiating receiving and transfer, but the target algae-encapsulated particles are not necessarily predicated on overall breakage or overall instability. This state enters S104, triggering the root zone closed-loop suspension and the second receiving box access process.

[0093] S104. Based on the particle instability state, before overall instability, the root zone closed loop is paused, and the subsequent target algae-encapsulated particles are switched to the second receiving box with pre-filled liquid and pressure balance completed. After the remaining target algae-encapsulated particles in the first receiving branch settle, the first receiving box and its connecting channel are sealed by the clear liquid sealing strip, and the entire first receiving box is removed.

[0094] See Figure 5 Before receiving subsequent target algae-encapsulated particles, the second receiving box is pre-filled with a clear liquid of the same origin as the liquid-phase buffer chamber, and the gas inside the second receiving box is discharged to achieve pressure balance between the second receiving box and the liquid-phase buffer chamber. After the second receiving box achieves an isobaric receiving state, when a clear liquid interval that meets the requirements for the operation of the diversion component appears between adjacent target algae-encapsulated particles, the particle receiving path is changed, so that subsequent target algae-encapsulated particles are switched from the receiving path corresponding to the first receiving box to the second receiving box.

[0095] After the switching is completed, the remaining target algae-encapsulated particles that had entered the downstream of the first receiving branch and the connecting channel before the switching continue to move towards the first receiving box along the original receiving path and settle into the particle deposition area of ​​the first receiving box. When no more target algae-encapsulated particles pass through the closed positions of the connecting channel and the first receiving box, the connecting channel and the first receiving box are closed sequentially within the clear liquid sealing strip, so that the first receiving box is in a sealed receiving state, and the sealed first receiving box is then removed as a whole.

[0096] During the aforementioned switching process, the second receiving box continues to receive subsequent target algal-encapsulated particles, and establishes a particle deposition zone, the highest activity position, and a clear liquid sealing zone according to the aforementioned layered receiving state formation method. After the second receiving box forms a layered receiving state, it restores the closed loop of the root zone between the liquid phase buffer chamber and the plant root zone. S104 includes S801 to S904.

[0097] S801. Based on the particle instability state, suspend the closed loop in the root region and keep the shellfish filter feeding water supply path connected to obtain a liquid path isolation state.

[0098] When the unstable state of the particles is converted to the pre-removal state, the closed loop of the root zone between the liquid buffer chamber and the plant root zone is suspended, so that the liquid extraction position no longer forms a continuous active liquid extraction, and the liquid return position no longer forms a continuous active liquid return from the plant root zone.

[0099] As an optional implementation, the output of the circulation pump can be gradually reduced until it stops, allowing the circulating liquid flow to smoothly exit the current operating state. Suspending the closed-loop circulation in the root zone does not change the connectivity of the shellfish filter-feeding water supply path; the shellfish continue to operate under the original filter-feeding conditions. The first receiving box and the first receiving branch are also not immediately disconnected, allowing the target algae-encapsulated particles that have entered the downstream of the first receiving branch to still settle into the first receiving box. The state where the active circulation in the root zone has been suspended while the shellfish filter-feeding water supply path remains connected is defined as the liquid path isolation state.

[0100] S802. According to the liquid path isolation state, the clear liquid of the same origin as the liquid phase buffer chamber is pre-filled into the second receiving box, the gas in the second receiving box is discharged, and the second receiving box and the liquid phase buffer chamber are pressure balanced to obtain an isobaric receiving state.

[0101] In the liquid-isolated state, clear liquid is obtained from the current liquid-phase buffer chamber and pre-charged into the second receiving box. In this embodiment, the homologous clear liquid refers to liquid obtained from the currently operating liquid-phase buffer chamber that is not located in the deposition area of ​​the target algae-encapsulated particles, ensuring that the liquid source before the second receiving box is connected corresponds to the currently operating liquid phase. The second receiving box is equipped with a pre-charge liquid inlet and an exhaust port. During the pre-charge process, clear liquid gradually enters the second receiving box, and the original gas inside the box is discharged through the exhaust port as the liquid level rises.

[0102] As an optional implementation, the pre-filling liquid inlet is located at the bottom of the second receiving box or communicates with the inside of the box through a slow-flow structure, so that the pre-filling process does not form a concentrated liquid flow that directly impacts the receiving area. After the second receiving box reaches the required liquid level and completes the main venting, a pressure connection is established between the second receiving box and the liquid phase buffer chamber, and the pressure state between the two is obtained.

[0103] The allowable pressure balance range is determined based on the feedback condition of the receiving switch disturbance in S203. The pressure change range that has not yet caused effective feedback during the simulated switch is used as the control basis for the actual connection of the second receiving box. When the second receiving box completes the pre-filling of the same source clear liquid and the main venting, the liquid level is in the receiving allowable state, and the pressure difference between the second receiving box and the liquid phase buffer chamber enters the corresponding allowable range and remains stable, an isobaric receiving state is determined to be formed. The isobaric receiving state does not require that the two positions have exactly the same pressure value at any instant.

[0104] For open or connected water structures, the pressure states being compared include the combined effects of the liquid level head at the connection point and the local gas phase pressure on the transient connection. As long as the second receiving box does not generate rapid suction, reverse backflow, or concentrated spur flow that exceeds the conditions for the release of the receiving switching disturbance after connection, the pressure balance described in this embodiment is considered to have been achieved.

[0105] S803. According to the isobaric receiving state, within the clear liquid interval between adjacent target algae-encapsulated particles, the subsequent target algae-encapsulated particles are switched to the second receiving box to obtain the receiving switching state.

[0106] If the second receiving box has not completed its main venting, the liquid level has not entered the acceptable receiving state, or the pressure between it and the liquid phase buffer chamber is still outside the allowable range of the receiving switching disturbance release conditions, the diversion component switching will not be performed. Instead, pre-charging, venting, or pressure connection will continue in a manner that does not form a concentrated flow. If the second receiving box has already reached an isobaric receiving state but the pressure state falls outside the allowable range again before the diversion action is initiated, the current switching conditions will be canceled, and a new clearing interval will be detected only after the isobaric receiving state is reconfirmed.

[0107] After the second receiving box establishes an isobaric receiving state, the passage status of the target algae-encapsulated particles is continuously monitored upstream of the receiving switching position. When one target algae-encapsulated particle has passed the receiving switching position and the next target algae-encapsulated particle has not yet arrived, a liquid phase time period is formed between the two particles where the receiving switching position is not occupied by the target algae-encapsulated particle.

[0108] Before the equipment is put into operation, the time required from the issuance of the switching control to the establishment of the corresponding receiving path in the second receiving box can be obtained by actually executing the complete switching action of the diversion component. The time period of the particle-free liquid phase that can cover one complete switching action is defined as the clearing interval. When the clearing interval meets the time requirement for the diversion component to complete the switching, and the second receiving box still maintains the isobaric receiving state, the diversion component is driven, so that the subsequent target algae-encapsulated particles switch from the receiving path corresponding to the first receiving box to the receiving path corresponding to the second receiving box. Target algae-encapsulated particles that have already crossed the receiving switching position before the switching is completed continue to move towards the first receiving box along the first receiving branch and connecting channel. This forms the receiving switching state.

[0109] S901. According to the receiving and switching state, the remaining target algae-encapsulated particles in the first receiving branch are allowed to settle into the particle deposition area, resulting in a particle-free sealing state.

[0110] When the detected period of no-particle liquid phase is shorter than the time required for the diversion component to complete one full switch, the particle receiving path corresponding to the first receiving box remains unchanged, the diversion action is not initiated during this period, and the detection of the liquid phase period between the next adjacent target algae-encapsulated particles continues. Switching control is only issued when the isobaric receiving state is valid and the current clear liquid interval can completely cover the action of the diversion component.

[0111] After the receiving and switching state is formed, the first receiving branch, connecting channel, and first receiving box downstream of the receiving and switching position are kept connected, and the closed loop in the root zone is kept suspended. The residual target algae-encapsulated particles downstream of the first receiving branch continue to settle into the first receiving box and enter the particle deposition zone.

[0112] The system continuously monitors the vicinity of the closed positions of the connecting channel and the first receiving box to detect the presence of target algae-encapsulated particles. When no more target algae-encapsulated particles are detected at either of the closed positions, and any remaining target algae-encapsulated particles that have entered the first receiving box are below the boundary of the clear liquid sealing strip, a particle-free sealing state is determined. This state only indicates that no target algae-encapsulated particles have passed through or continuously occupied the two closed positions; it does not indicate that target algae-encapsulated particles are absent from the interior of the first receiving box.

[0113] S902. Based on the particle-free sealing state, the connecting channel and the first receiving box are closed sequentially within the clear liquid sealing strip to obtain a sealed receiving state.

[0114] After confirming a particle-free sealing state, the sealing is performed within the clear liquid sealing strip in the order of connecting channel first, followed by the first receiving box. The clear liquid sealing strip covers the final sealed section of the first receiving box and connecting channel, and also covers the main movement areas traversed by the first and second sealing components as they move from the open to the closed state, maintaining spatial separation between the movement of the sealing components and the particle deposition area. The first sealing component is driven to close the connecting channel, stopping liquid communication between the upstream of the first receiving branch and the first receiving box to be removed; after the connecting channel is sealed, the second sealing component is driven to close the first receiving box, keeping the particle deposition area, the target algae-encapsulated particles therein, and the corresponding liquid inside the box inside the first receiving box. When both the first and second sealing components remain closed, and the particles and retained liquid inside the first receiving box can move together with the box body, a sealed receiving state is determined.

[0115] S903. Remove the first receiving box, which is in the sealed receiving state, as a whole, and restore the root region closed loop after the second receiving box forms a layered receiving state.

[0116] After the first receiving box achieves a sealed receiving state, the detachable connection between the first receiving box and the system's fixed structure is released. While maintaining the first receiving box's own seal, the first receiving box, along with the target algae-encapsulated particles inside and the liquid retained within, is removed entirely from the water purification system. During this removal process, the target algae-encapsulated particles are not drawn from the operating liquid path, nor are the particles transferred from the first receiving box within the operating water. While the first receiving box is being removed, the second receiving box continues to receive subsequent target algae-encapsulated particles.

[0117] Following the same determined caliber as S301 to S403, a particle deposition zone is formed in the second receiving box. The highest activity position is determined, and a clear liquid sealing band is formed above it, covering the corresponding closed position of the second receiving box. The upper part of the second receiving box is connected to the liquid phase buffer chamber through a position offset from the main falling trajectory of the target algae-encapsulated particles. The root zone closed loop remains suspended until the second receiving box forms a new stratified receiving state. After confirming that the second receiving box has formed a stratified receiving state, the root zone closed loop between the liquid phase buffer chamber and the plant root zone is restored.

[0118] As an alternative implementation, recovery can begin from a lower circulation state, and the circulating return liquid can be kept within the stable range of circulating return liquid disturbance determined in S203, depending on the activity of the top of the particles in the second receiving box.

[0119] S904. Based on the integrity of the target algae-encapsulated particles in the first receiving box after removal, modify the homologous instability re-release criterion.

[0120] After the first receiving box is separated from the operating system, the integrity of the target algae-encapsulated particles inside the box is tested. The integrity of the target algae-encapsulated particles is compared with the complete reference state formed by S202, including the preservation of the particle's main outline, whether the encapsulation structure has undergone obvious separation, and whether there are active target algae cells in the liquid phase outside the particles that meet the conditions for effective re-release.

[0121] As an optional implementation, particle images are obtained through the observation area of ​​the first receiving box, and changes and activity of target algal cells in the liquid phase outside the particles are detected through an independent sampling interface. Sampling is performed after the first receiving box has left the operating system, without altering the aforementioned process of the first receiving box being removed entirely from the operating water body in a closed manner. Particles are defined as maintaining an intact state when they retain a continuous main outline, do not form obviously separated main fragments, and no effective back-release occurs in the liquid phase outside the particles. Particles are defined as having reduced integrity when they show obvious splitting or continuous disintegration, or when, although the external outline remains basically continuous, active target algal cells meeting the conditions for effective back-release confirmation have appeared in the liquid phase outside the particles. The particle integrity results are correlated with the homologous instability back-release criteria and operating records used in the current receiving cycle.

[0122] When particles are intact and no effective backflow occurs in the liquid phase outside the particles, the current criterion for backflow due to homologous instability is maintained, and the disturbance or residence conditions are not automatically relaxed based on a single good integrity result. When the integrity of removed particles decreases, the specific cause of instability is not directly identified and the criterion is not modified based on a single operation record. Instead, the proximity of the lateral water flow, circulating return liquid, reception switching, and residence status in the current reception cycle to their respective allowable boundaries is read. The corresponding type that is close to the allowable boundary is used as the verification object, and the corresponding homologous disturbance control or residence control is re-executed.

[0123] If the review results confirm effective back-release or a decrease in integrity under the original boundary, a more conservative adjacent state is selected from the stable states that have already completed homologous control as the corresponding control boundary for the subsequent reception cycle. If the review results do not confirm the failure of the original boundary, the original homologous instability back-release criterion is maintained. When it is necessary to relax the disturbance range, extend the allowable dwell time, or expand the reception switching pressure range, the corresponding homologous control is also re-implemented, and the homologous instability back-release criterion is updated only based on the new control results. This completes the feedback loop from the current reception cycle to the next reception cycle.

[0124] As a complete operational path, a criterion for homologous instability and back-release is established before the start of the current receiving cycle, and based on this, the stratified receiving state of the first receiving box and the closed loop of the root zone are established. During the receiving process, the target algae status, the residence status of the earliest particles entering the first receiving box, and the highest activity position are continuously obtained at four detection locations. When any of the pre-removal conditions in the receiving switching point, the clear liquid sealing zone space conditions, or the endogenous back-release state are met, the closed loop of the root zone is paused while maintaining the continuity of the shellfish filter feeding water supply path. After the second receiving box completes the homologous clear liquid pre-filling, venting, and pressure balancing, the receiving switching is completed within the clear liquid interval that meets the action time requirements. The residual particles that have entered the downstream of the first receiving branch before the switching continue to settle. After the two closed positions form a particle-free sealing state, the connecting channel and the first receiving box are closed in sequence, and the particles are removed from the first receiving box as a whole. After the second receiving box forms a new stratified receiving state, the closed loop of the root zone is restored. The integrity results of the removed particles are then entered into the corresponding homologous control for verification, thus completing one receiving cycle and entering the next receiving cycle.

[0125] Example 2 In this embodiment, the water synergistic purification system is described below. Figures 3 to 5 This embodiment provides a water body synergistic purification system. Figure 3 This shows the spatial relationship between the source receiving component and the clear liquid sealing strip. Figure 4 This illustrates the relationship between liquid intake and return within the same cavity of the root zone circulation component and the identification of the target algae's state and origin. Figure 5 The process of switching the first and second receiving boxes, closing them, and removing them as a whole is shown.

[0126] Specifically, the system includes a homology identification component, a source location receiving component, a root region circulation component, and a receiving switching component. Each component operates in coordination around the homology instability back-release criterion, hierarchical receiving state, root region closed loop, and pre-instability switching relationship of Embodiment 1. To correlate the detection state and the executed actions, the system in this embodiment is equipped with a controller. The controller establishes signal or control connections with the homology identification component, the root region circulation component, and the receiving switching component, and receives operational information such as the homology instability back-release criterion, the target algae state, the particle residence state, and the highest activity position.

[0127] The homology identification component includes a background water sample collection interface, a particle sampling interface, a first sample container, a second sample container, a third sample container, a disturbance application structure, a target algae detection structure, and a target algae cell activity detection structure. The background water sample collection interface is connected to the liquid phase region that reflects the state of the background water at the current shellfish farming location; the particle sampling interface corresponds to the target algae-encapsulated particle discharge area, allowing the target algae-encapsulated particles discharged during the same operating period to enter the three sample containers.

[0128] The first sample receiving section forms an immediate static observation space. The second sample receiving section cooperates with the disturbance application structure, which can generate lateral water flow disturbance, circulation return disturbance, and receiving switching disturbance corresponding to the actual first receiving branch, circulation return liquid position, and receiving switching process. The third sample receiving section forms a continuous static observation space, using the state of the target algae-encapsulated particles after completing the main sedimentation as the basis for observation. The target algae detection structure and the target algae cell activity detection structure provide target algae identification results and activity status, respectively, which are correlated by the controller to form the current homologous instability release criterion. The source receiving component includes a first receiving branch, a connecting channel, and a first receiving box. The first receiving branch is set in the main falling area of ​​the target algae-encapsulated particles and is separated from the shellfish filter feeding water supply path; the first receiving branch is connected to the first receiving box via the connecting channel.

[0129] As an optional implementation, a particle guiding structure can be set between the particle falling area and the entrance of the first receiving branch, allowing the target algae-encapsulated particles to enter the first receiving branch primarily through self-settling. A particle deposition zone is formed at the bottom of the first receiving box, and a particle position detection structure can be set on the side of the first receiving box to obtain the highest active position at the top of the particle deposition zone. The first receiving box has a first receiving box closed position, and the connecting channel has a connecting channel closed position. Both closed positions are located above the highest active position when the current stratified receiving state is established and are covered by a clear liquid sealing strip. A liquid connection position is set at the top of the first receiving box, communicating with the liquid phase buffer chamber. This connection position is located above the clear liquid sealing strip and deviates from the main falling trajectory of the target algae-encapsulated particles.

[0130] The root zone circulation assembly includes a liquid phase buffer chamber, a plant root zone, a circulation intake path, and a circulation return path. The liquid phase buffer chamber is connected to the first receiving box via a liquid connection point on the upper part of the first receiving box. Separate circulation intake and return positions are set within the liquid phase buffer chamber. The circulation intake position is connected to the inlet side of the plant root zone, and the outlet side of the plant root zone is connected to the circulation return position, allowing liquid to be taken from the same liquid phase buffer chamber, processed in the plant root zone, and returned to the same liquid phase buffer chamber. The return direction of the circulation return position can be set relative to the particle deposition area of ​​the first receiving box, ensuring that the main return liquid avoids the particle deposition area. When active liquid circulation is required, a circulation pump can be installed in the circulation intake path; when the return state needs adjustment, an adjustment structure that can change the return direction or the degree of return flow can be installed. Its operating state is constrained by the circulation return disturbance release condition in the homogeneous instability release criterion.

[0131] The system sets up target algae detection points along the shellfish filter-feeding water supply path, above the particle deposition zone, at the circulation intake point, and at the circulation return point. Each detection point provides the controller with the corresponding first to fourth target algae states. The controller uses a unified time reference to compare the order of appearance of target algae cells at different locations to determine the endogenous re-release state, exogenous input state, or abnormal state of root zone re-return; simultaneously, it receives the highest particle activity position and the particle residence state in the current reception cycle to form a stable reception state or a pre-removal state.

[0132] In addition to using a unified time reference and correcting for fixed response differences at each target algae detection location, the controller also stores the liquid phase propagation reference corresponding to the current closed-loop state of the root zone. This liquid phase propagation reference is updated as the circulation flow state or liquid path connection changes, and is used together with the occurrence time of each detection location to determine the propagation direction of the target algae change. When the existing time resolution is insufficient to distinguish the propagation direction, the controller maintains the previous effective source state and does not output a new source judgment.

[0133] The receiving and switching assembly includes a second receiving box, a diversion assembly, a pre-filling liquid path, an venting structure, a pressure balancing structure, a first sealing element, and a second sealing element. The diversion assembly is located at the receiving and switching position upstream of the first receiving branch and is connected to the receiving paths corresponding to the first and second receiving boxes, respectively. The second receiving box is connected to the liquid phase buffer chamber via the pre-filling liquid path. The venting structure corresponds to the area on the upper part of the second receiving box where gas can be collected. The pressure balancing structure establishes pressure communication between the second receiving box and the liquid phase buffer chamber. The first sealing element corresponds to the closed position of the connecting channel, and the second sealing element corresponds to the closed position of the first receiving box. The controller obtains the pre-filling, venting, and pressure status of the second receiving box and confirms the isobaric receiving state based on the receiving and switching disturbance return conditions. A particle passing detection position is set upstream of the diversion assembly to determine the clear liquid interval between adjacent target algae-encapsulated particles that can cover the complete operation time of the diversion assembly.

[0134] After the particle instability state is converted to the pre-removal state, the controller pauses the closed loop in the root zone and keeps the shellfish filter feeding water supply path connected; if the isobaric receiving state is not formed or the current clear liquid interval is insufficient, the original receiving path is maintained; when the isobaric receiving state is effective and the clear liquid interval meets the switching requirements, the controller drives the diversion component to switch the subsequent target algae-encapsulated particles to the second receiving box.

[0135] After the diversion is completed, the remaining target algae-encapsulated particles downstream of the first receiving branch and in the connecting channel continue to settle into the particle deposition area of ​​the first receiving box. Once both sealing positions are in a particle-free sealing state, the first sealing element closes the connecting channel, and the second sealing element closes the first receiving box, creating a sealed receiving state. The first receiving box can be installed at the system's bearing position via a detachable connection. After the sealed receiving state is achieved, this connection is released, and the entire first receiving box is removed. The second receiving box continues to receive subsequent target algae-encapsulated particles, forming a new particle deposition area, a clear liquid sealing zone, and upper communication with the liquid phase buffer chamber, following the same spatial relationship as the first receiving box. After the second receiving box achieves a layered receiving state, the closed loop between the liquid phase buffer chamber and the plant root zone is restored, and the system enters the next receiving cycle.

[0136] From a fluid dynamics perspective, the shellfish filter-feeding water supply pathway provides continuous water for shellfish filter feeding, while the particle receiving pathway transports target algae-encapsulated particles to either the first or second receiving box. The root zone closed-loop circulation handles the circulation of the liquid phase above the particles between the liquid phase buffer chamber and the plant root zone. From a state-related perspective, the homologous instability back-release criterion formed by the homologous identification component enters the source site receiving, circulation back-liquid, and receiving switching processes; the target algae detection state, particle residence state, and highest activity position enter the particle instability state judgment; the pre-removal state enters the root zone circulation pause and the second receiving box switching; the integrity of the removed particles, within the existing homologous control range, is fed back to the next receiving cycle.

[0137] See Figures 3 to 5 The particle receiving space relationship of the source receiving component, the liquid taking and returning relationship of the same liquid phase buffer chamber of the root region circulation component, and the dual-box switching and sealing relationship of the receiving switching component correspond to Example 1, respectively. The arrows in the figure indicate the direction of corresponding material, liquid phase or state transfer.

[0138] The above description is merely a preferred embodiment of this application. The scope of protection of this application is not limited to the above embodiments. All technical solutions falling within the scope of this application's concept are within the scope of protection of this application. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this application should also be considered within the scope of protection of this application.

Claims

1. A method for synergistic water purification, characterized in that, include: Complete control, disturbance control and residence control were conducted on target algal encapsulated particles discharged from the same shellfish culture location at the same time. The disturbance and residence re-release conditions were determined in combination with the target algal cell activity to obtain the homologous instability re-release criteria. According to the homologous instability and release criterion, the target algae-encapsulated particles are introduced into the first receiving box through the first receiving branch separated from the shellfish filter feeding water supply path, forming a clear liquid sealing band covering the closed position above the particle deposition area, thus obtaining a layered receiving state. Based on the layered receiving state, a closed loop is established in the root zone between the liquid phase buffer chamber connected to the upper part of the first receiving box and the plant root zone, with the liquid taking and returning corresponding to the same liquid phase buffer chamber. The particle instability state is determined by combining the homologous instability back release criterion and the order of appearance of target algal cells. Based on the particle instability state, the closed loop of the root zone is paused before overall instability. The subsequent target algae-encapsulated particles are switched to the second receiving box with pre-filled liquid and pressure balance completed. After the remaining target algae-encapsulated particles in the first receiving branch settle, the first receiving box and its connecting channel are sealed by the clear liquid sealing strip, and the entire first receiving box is removed.

2. The water synergistic purification method according to claim 1, characterized in that, The criteria for obtaining homologous instability back-interpretation include: Background water samples were collected from the shellfish farming locations, and the target algae-encapsulated particles discharged at the same time period were divided into a first control sample, a second control sample, and a third control sample. The first control sample was observed immediately under static conditions to obtain a complete reference state; the second control sample was subjected to lateral water flow disturbance, circulating return liquid disturbance, and receiving switching disturbance to obtain a disturbance return state; the third control sample was observed continuously under static conditions to obtain a residence return state. Based on the background water sample and the complete reference state, the background changes of the target algal cells are determined. Combining the perturbation back-release state, the residence back-release state, and the target algal cell activity, the perturbation back-release conditions and the residence back-release conditions are determined respectively, and the homologous instability back-release criterion is obtained.

3. The water synergistic purification method according to claim 1, characterized in that, The process of obtaining the hierarchical acceptance state based on the homologous instability back-release criterion includes: Based on the disturbance release conditions and the falling trajectory of the target algae-encapsulated particles, the first receiving branch is separated from the shellfish filter feeding water supply path, forming a source-position receiving state. According to the source location receiving status, the target algae-encapsulated particles are introduced into the first receiving box, and the highest active position of the particle deposition area is determined according to the settling position of the target algae-encapsulated particles. The clear liquid sealing strip is formed according to the highest active position and the closed position of the first receiving box, and the upper part of the first receiving box is biased and connected to the liquid phase buffer chamber to obtain the layered receiving state.

4. The water synergistic purification method according to claim 3, characterized in that, The step of forming the clear liquid sealing strip according to the highest active position and the closed position of the first receiving box, and making the upper part of the first receiving box offset and connected to the liquid phase buffer chamber, includes: The highest active position of the particle deposition zone is determined based on the settling position of the target algae-encapsulated particles and the range of movement at the top after deposition. A clear liquid area is reserved above the highest active position to cover the closed position of the first receiving box and its connecting channel, forming the clear liquid sealing strip; Based on the position of the clear liquid sealing strip, the communication position between the first receiving box and the liquid phase buffer chamber is set above the clear liquid sealing strip, and the communication position is offset from the falling trajectory of the target algae-encapsulated particles.

5. The water synergistic purification method according to claim 1, characterized in that, The step of establishing a root region closed loop based on the layered acceptance state and determining the particle instability state includes: Based on the layered receiving state, the mutually separated circulating liquid intake position and circulating liquid return position are determined in the liquid phase buffer chamber to obtain the liquid phase flow state; According to the liquid flow state, the liquid in the liquid buffer chamber is transported to the plant root zone, and the treated liquid is returned to the liquid buffer chamber through the circulation return position to obtain the closed loop of the root zone; The direction of the return liquid at the location of the circulating return liquid is adjusted according to the disturbance return conditions so that the return liquid avoids the particle deposition area, and the particle instability state is determined by combining the order of appearance of target algal cells at different locations.

6. The water synergistic purification method according to claim 5, characterized in that, The determination of the particle instability state by combining the order of appearance of target algal cells at different locations includes: The changes in target algal cells at the shellfish filter-feeding water supply path, above the particle deposition zone, at the circulating liquid intake position, and at the circulating liquid return position are obtained to obtain the first target algal state, the second target algal state, the third target algal state, and the fourth target algal state, respectively. The re-release source state is determined based on the order in which target algal cells appear in the first target algal state, the second target algal state, the third target algal state, and the fourth target algal state. When the first target algae state remains in the background state, and the target algae cells in the second target algae state appear before the third target algae state, the re-release source state is determined to be the endogenous re-release state. When the target algal cells in the first target algal state appear before the second target algal state, the re-release source state is determined to be an exogenous input state. When the target algal cells in the fourth target algal state appear before the third target algal state, and the second target algal state remains in the background state, the state of the backflow source is determined to be an abnormal state of root zone backflow. Based on the state of the re-release source, combined with the residence state of the target algae-encapsulated particles and the positional change of the clear liquid sealing strip, the unstable state of the particles is determined.

7. The water synergistic purification method according to claim 6, characterized in that, The step of determining the particle instability state based on the reabsorption source state, combined with the residence state of the target algae-encapsulated particles and the positional change of the clear liquid sealing strip, includes: Based on the residence status of the target algae-encapsulated particles that first enter the first receiving box and the residence and release conditions, the receiving and switching time point before the first release of the target algae cells is determined. The sealing protection status is determined based on the positional change between the highest active position of the particle deposition zone and the clear liquid sealing zone; When the receiving and switching point is reached, or when the sealing protection state indicates that the highest active position has reached the boundary of the clear liquid sealing strip, or when the release source state is the endogenous release state, the particle instability state is changed from the stable receiving state to the pre-removal state.

8. The water synergistic purification method according to claim 1, characterized in that, The step of pausing the closed loop in the root region and switching the subsequent target algae-encapsulated particles to the second receiving box includes: The closed loop in the root zone is paused based on the particle instability state, while the water supply path for the shellfish filter feeding remains connected, resulting in a liquid path isolation state. According to the liquid path isolation state, the clear liquid of the same origin as the liquid phase buffer chamber is pre-filled into the second receiving box, the gas in the second receiving box is discharged, and the second receiving box and the liquid phase buffer chamber are made to achieve pressure balance, so as to obtain an isobaric receiving state. Based on the isobaric receiving state, within the clear liquid interval between adjacent target algae-encapsulated particles, the subsequent target algae-encapsulated particles are switched to the second receiving box, thus obtaining the receiving switching state.

9. A method for synergistic water purification according to claim 8, characterized in that, The steps of sealing off the first receiving box and its connecting channel respectively, and removing the first receiving box as a whole, include: According to the receiving and switching state, the remaining target algae-encapsulated particles in the first receiving branch are allowed to settle into the particle deposition area, resulting in a particle-free sealing state. Based on the particle-free sealing state, the connecting channel and the first receiving box are closed sequentially within the clear liquid sealing strip to obtain a sealed receiving state; The first receiving box, which is in the sealed receiving state, is removed as a whole, and the root area closed loop is restored after the second receiving box forms a layered receiving state; The homologous instability re-release criterion is modified based on the integrity of the target algae-encapsulated particles in the first receiving box after removal.

10. A water synergistic purification system for implementing the water synergistic purification method as described in any one of claims 1 to 9, characterized in that, This includes a same-source identification component, a source location acceptance component, a root region loop component, and an acceptance switching component; The homology identification component performs complete control, disturbance control, and residence control on target algae-encapsulated particles discharged from the same shellfish farming location at the same time period, and determines the homology instability re-release criterion in combination with the target algae cell activity; The source receiving component includes a first receiving branch separated from the shellfish filter feeding water supply path, a connecting channel, and a first receiving box. The first receiving box is connected to the first receiving branch through the connecting channel, and a clear liquid sealing strip is formed above the particle deposition area of ​​the first receiving box to cover the closed position. The root zone circulation component includes a liquid phase buffer chamber and a plant root zone that are connected to the upper part of the first receiving box. The liquid phase buffer chamber and the plant root zone form a closed loop in the root zone where liquid intake and return correspond to the same liquid phase buffer chamber. The receiving and switching component is connected to the same source identification component and the root region circulation component, and includes a second receiving box, a diversion component, a first sealing component and a second sealing component. The diversion component is connected to the upstream of the first receiving branch and the second receiving box. The first sealing component and the second sealing component correspond to the sealing positions of the connection channel and the first receiving box, respectively. The receiving and switching component determines the particle instability state based on the homologous instability back-release criterion and the order of appearance of target algal cells, suspends the closed loop in the root zone, and switches the subsequent target algal-encapsulated particles to the second receiving box with pre-filled liquid and pressure balance through the diversion component. After the remaining target algal-encapsulated particles in the first receiving branch settle, the connecting channel and the first receiving box are sealed by the first sealing member and the second sealing member, respectively.

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