Saline-alkali soil aquaculture tail water circulation treatment system and method

Abstract

The invention discloses a saline-alkali soil aquaculture tail water circulation treatment system and method, and belongs to the technical field of aquaculture sewage treatment. The system comprises a breeding field, a gutter channel and a tail water complex supervision center, wherein a water inlet channel and a water outlet channel are arranged between the breeding field and the gutter channel for communication; the salinity, nitrogen and phosphorus content and ecological indexes of tail water are collected in real time through the multi-parameter water quality monitoring buoy and the ecological monitoring marker post, water quality abnormity is accurately recognized based on a conductivity conversion model and over-standard rate analysis, regulation and control signals are generated to control equipment such as a fresh water dilution pump and an electric valve in a linkage mode, and the salinity and nitrogen and phosphorus concentration dynamically reach the standard. A closed ecological chain for plant absorption, biological purification and retention time optimization is constructed, the water flow path is automatically adjusted, the biological density is supplemented or the retention time is prolonged by quantifying the nitrogen and phosphorus absorption amount and the filter-feeding biological purification capacity of plants, efficient removal of pollutants is ensured, and tail water is recycled after being purified.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture wastewater treatment, and in particular to a saline-alkali land aquaculture tail water circulation treatment system and method. Background Art

[0002] As an important reserve arable land resource, the development and utilization of saline-alkali land is of great significance to alleviating the tension of land resources. However, characteristics such as high salinity, high pH value and ion imbalance have significantly restricted aquaculture, especially in the field of tail water treatment, which faces severe challenges. Traditional aquaculture tail water treatment technology is mainly designed based on freshwater environment. When applied in saline-alkali areas, saline-alkali land aquaculture tail water has the characteristics of high salinity, high alkalinity, and excessive nitrogen and phosphorus content.

[0003] Traditional tailwater treatment systems have problems such as poor adaptability to saline-alkali environments, lagging parameter monitoring, and inaccurate regulation. Existing technologies mostly focus on single physical or chemical treatments, lack real-time monitoring and regulation of saline-alkali tailwater, and it is difficult to achieve efficient recycling of tailwater. Therefore, building a soft flow system that integrates intelligent parameter analysis and dynamic regulation is crucial to improving the efficiency of saline-alkali aquaculture tailwater recycling treatment.

[0004] In conjunction with the above content, it should be noted that: the Chinese patent application number CN2023110252968 discloses a farmland drainage purification system, which uses a treatment channel with a primary sedimentation section, an ecological treatment section, and an ecological storage pool to ecologically treat and purify farmland drainage, reduce pollutants in farmland drainage, and reduce pollution in farmland drainage; However, in actual use and application in saline-alkali aquaculture areas, the one-way purification of tail water causes great waste of tail water, as well as additional chemical treatment costs for substances such as nitrogen and phosphorus rich in the tail water, and lacks accurate detection, analysis, regulation and reuse of tail water.

[0005] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a saline-alkali land aquaculture tail water circulation treatment system and method to solve the problems raised.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a saline-alkali land aquaculture tailwater circulation treatment system, comprising a breeding field, a water flow trough and a tailwater complex supervision center, wherein an inlet channel and an outlet channel are arranged between the breeding field and the water flow trough, a deep water area and a slow water area are arranged inside the water flow trough, a waterwheel-type aerator is arranged on the top of the deep water area, a filter dam is arranged between the slow water area and the deep water area, and a plurality of multi-parameter water quality monitoring buoys and a plurality of ecological monitoring poles are arranged inside the breeding field and the water flow trough; The tailwater complex supervision center is connected to a comprehensive parameter acquisition module, a water parameter analyzer, an ecological parameter analyzer and a control decision module; the comprehensive parameter acquisition module collects the total water parameters and planting cycle parameters in the breeding field and the water flow trough in real time according to the cycle, and sends them to the water parameter analyzer and the ecological parameter analyzer respectively; The water parameter analyzer is used to calibrate and group the data recorded in real time in the total water parameters according to the acquisition time period, analyze the salinity S, total nitrogen TN and total phosphorus TP to generate single-numbered salt adjustment signals and multi-level signals, and send them to the control decision module to adjust the mantissa processing process; The ecological parameter analyzer is used to analyze the nitrogen and phosphorus absorption of salt-tolerant plants, tailwater retention time and filter-feeding organism absorption data in the planting cycle parameters, and send the generated nitrogen and phosphorus control signals, delay signals and biological control signals to the control decision module, and regulate the tailwater according to the analysis results.

[0008] Furthermore, the water parameter analyzer performs an intra-cycle analysis process on the received total water parameters as follows: The total water parameters include pH value, salinity S, total nitrogen TN and total phosphorus TP in the tail water. Data is collected every 15 minutes to construct a collection cycle. The time sequence of each collection cycle is marked as a group number F1, F2, F3, ..., Fn, where n is a natural number greater than zero; The salinity in a single group is formalized according to the linear regression model. The salinity is converted based on the conductivity method. The specific formula is: S=a×EC+b, where EC is the conductivity μS / CM, a and B are the experimental ratio analysis coefficients. The salinity is calculated by measuring the conductivity of the water body and substituting it into the formula to determine whether it exceeds the tolerance range of aquaculture. The pre-stored salt is retrieved from the tailwater complex supervision center. 百分比 Threshold, if salinity > salt 百分比 threshold, it is determined that the salinity needs to be regulated within the collection period. 百分比 Difference between thresholds 盐差量 Generates a targeted, single-numbered salt-modulated signal.

[0009] Furthermore, the process of analyzing the excessive nitrogen and phosphorus contents based on the total water parameters is as follows: Retrieve the total nitrogen TN and total phosphorus TP in a single group number, and calculate the nitrogen and phosphorus excess rate formula based on the mathematical multiplication and division ratio: , , retrieve the aquaculture tailwater discharge standard value from the tailwater complex supervision center and compare and analyze it with the TN exceedance rate and TP exceedance rate. If the TN exceedance rate is greater than the standard value and the TP exceedance rate is less than the standard value, a first-level signal is generated; if the TN exceedance rate is less than the standard value and the TP exceedance rate is greater than the standard value, a second-level signal is generated; if the TN exceedance rate is greater than the standard value and the TP exceedance rate is greater than the standard value, a third-level signal is generated and sent to the control decision module.

[0010] Furthermore, the ecological parameter analyzer performs intra-cycle analysis and processing on the received planting cycle parameters as follows: The growth indicators of salt-tolerant plants in the breeding field, such as plant height H, coverage rate C, and filter-feeding organism density M, were collected through ecological monitoring poles and stored in corresponding groups according to the collection time. The nitrogen and phosphorus absorption of salt-tolerant plants was calculated: , , where k 1 and k 2 It is expressed as the nitrogen and phosphorus absorption coefficient of salt-tolerant plants experimentally determined, k 1 The acceptable value is 0.05mg / cm 2 ·d / TN, k 2 The acceptable value is 0.01mg / cm 2 ·d / TP.

[0011] Furthermore, after obtaining the TN absorption and TP absorption, the tailwater residence time formula is retrieved from the tailwater complex supervision center: , where t represents the optimization of ecological purification efficiency. Optimizing ecological purification efficiency means adjusting the tailwater residence time or other water parameters to achieve the best removal effect of pollutants in the tailwater by the ecosystem. The ecosystem includes plants, microorganisms, and filter-feeding organisms. The pollutants in the tailwater include nitrogen and phosphorus. V represents the experimental measured value of the water volume in the collection area, and Q represents the tailwater detection flow value.

[0012] Furthermore, the TN collected during this time 实测 TP 实测 The nitrogen load value and phosphorus load value are obtained by multiplying with Q and t respectively, and the combined result of the nitrogen load value and the phosphorus load value is marked as the tailwater nitrogen and phosphorus load. The plant absorption amount stored in the routine test is retrieved from the tailwater complex supervision center for comparison and analysis with the tailwater nitrogen and phosphorus load. If the plant absorption amount is greater than the tailwater nitrogen and phosphorus load, the purification capacity meets the standard; if the plant absorption amount is less than the tailwater nitrogen and phosphorus load, it means that the plant purification is insufficient, and a nitrogen and phosphorus regulation signal is generated and sent to the regulation decision module; The preset tailwater retention time is retrieved from the tailwater complex supervision center for comparison with t. If t≥the preset tailwater retention time, the purification demand is met; if t≤the preset tailwater retention time, the purification demand is not met, a delay signal is generated, and the delay signal is sent to the control decision module.

[0013] Further, the density of filter-feeding organisms M is counted by underwater cameras, combined with the von Bertalanffy growth model of fish to predict the nitrogen and phosphorus absorption capacity, and the pre-stored predicted absorption range is retrieved from the tailwater complex supervision center. According to the product formula: filter-feeding organism absorption = M × single fish daily absorption, the predicted absorption range is compared with the filter-feeding organism absorption. If the filter-feeding organism absorption is within the predicted absorption range, it means that the tailwater biological purification in this area is qualified. If the filter-feeding organism absorption is less than the predicted absorption range, it means that the tailwater biological purification in this area is unqualified. The single fish daily absorption is the nitrogen and phosphorus content absorbed by each fish in the experimental data. The plant absorption amount is obtained and the absorption amount of the filter-feeding organisms that fail the purification is summed to obtain the total absorption amount. If the total absorption amount is ≥ the tail water nitrogen and phosphorus load, it means that the overall tail water purification meets the standard. If the total absorption amount is ≤ the tail water nitrogen and phosphorus load, it means that the overall tail water purification is abnormal, and a biological control signal is generated and sent to the control decision module.

[0014] A working method of a saline-alkali land aquaculture tail water circulation treatment system comprises the following steps: Water quality testing: Real-time data monitoring and collection of tailwater from aquaculture fields and water troughs through multi-parameter water quality monitoring buoys and ecological monitoring poles; Data processing: By analyzing the total water parameters and plant cycle parameters of the collected data, the salinity, nitrogen and phosphorus exceeding standard rate, plant purification efficiency and filter feeding biological absorption efficiency are calculated through formulas; Control and relief: According to the analysis results, the electric valve, fresh water dilution pump and waterwheel aerator are controlled in a linked manner to achieve dynamic control of tailwater salinity and nitrogen and phosphorus concentrations; Data display: The tailwater complex supervision center displays abnormal data areas through a graphical interface to assist manual intervention.

[0015] The beneficial effects of the present invention are: 1. The present invention realizes real-time dynamic monitoring of aquaculture tail water in saline-alkali land through multi-parameter water quality monitoring buoys and ecological monitoring benchmarks. Based on the conductivity method and nitrogen and phosphorus exceedance rate model, it can accurately identify salinity anomalies and nitrogen and phosphorus pollution levels. By grouping the collected data by time period, combining linear regression analysis and threshold comparison, targeted control signals are generated to realize intelligent linkage control of freshwater dilution pumps, electric valves and other equipment, ensuring that the tail water salinity and nitrogen and phosphorus concentrations quickly meet the standards, solving the problems of lagging parameter monitoring and inaccurate control in traditional systems.

[0016] 2. The present invention constructs a closed ecological cycle by integrating plant absorption, filter-feeding biological purification and tail water retention time optimization. The nitrogen and phosphorus absorption formula of salt-tolerant plants and the filter-feeding biological absorption prediction model work together to quantitatively evaluate the purification capacity of the ecosystem. When the plant absorption is insufficient or the tail water retention time is too short, the system automatically adjusts the water flow path, extends the retention time or supplements the biological density to achieve efficient removal of pollutants. In addition, the tail water is recycled after purification to reduce water resource waste and reduce the use of chemical agents, which is in line with the concept of green breeding.

[0017] 3. The present invention realizes the whole process control of breeding fields and water troughs, combines the generated signals to build display reminders, assists manual intervention, supports multi-dimensional data superposition analysis, and improves the reliability of data verification. Through dynamic control strategies, the system can adapt to seasonal changes and fluctuations in breeding loads to ensure long-term stable operation, providing a cost-effective and efficient tailwater treatment solution for saline-alkali land aquaculture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the method flow of the present invention; Figure 2 It is a schematic diagram of the system flow structure of the present invention; Figure 3 It is a schematic diagram of the structure of the breeding field and water flow trough of the present invention.

[0020] Figure numerals: 1. Breeding field; 2. Water flow trough; 3. Slow water area; 4. Filter dam; 5. Deep water area; 6. Waterwheel-type aerator. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1 - Figure 3As shown, this embodiment is a saline-alkali land aquaculture tailwater circulation treatment system and method, including a breeding field 1, a water flow trough 2 and a tailwater complex supervision center, an inlet channel and an outlet channel are arranged between the breeding field 1 and the water flow trough 2, a deep water area 5 and a slow water area 3 are arranged inside the water flow trough 2, a waterwheel-type aerator 6 is arranged on the top of the deep water area 5, a partition filter dam 4 is arranged between the slow water area 3 and the deep water area 5, and a slag discharge port is arranged on the side of the filter dam 4 away from the breeding field 1.

[0023] A plurality of groups of fresh water suction pumps are arranged on the same side of the waterwheel aerator 6 near the slag discharge port. The waterwheel aerator 6 is linked with the salinity monitoring. When S>5%, the aeration volume is increased to promote the photosynthesis of salt-tolerant plants and improve the nitrogen and phosphorus absorption efficiency. A plurality of multi-parameter water quality monitoring buoys and a plurality of ecological monitoring poles are arranged inside the breeding field 1 and the water flow channel 2, which are connected to the tailwater complex supervision center for communication. Electric valves such as DN200 electric regulating valves are installed inside the inlet and outlet channels, but are not limited thereto. A pH sensor, a salinity sensor, an online ammonia nitrogen sensor, a total nitrogen and total phosphorus sensor, etc. are arranged inside the multi-parameter water quality monitoring buoy, which are selected according to actual needs, but are not limited thereto. A water temperature sensor, a water depth float, an underwater camera, etc. are arranged inside the ecological monitoring pole, which are selected according to actual needs, but are not limited thereto. The tailwater complex supervision center is connected to the comprehensive parameter acquisition module, water parameter analyzer, ecological parameter analyzer and control decision module; the tailwater complex supervision center generates supervision instructions according to the operation of the tailwater circulation treatment system, and the supervision instructions are sent to the comprehensive parameter acquisition module. The comprehensive parameter acquisition module operates in coordination through several types of sensors, and collects the total water parameters and planting cycle parameters in the breeding field 1 and the water trough 2 in real time according to the cycle, and sends them to the water parameter analyzer and the ecological parameter analyzer respectively.

[0024] The water parameter analyzer is used to calibrate and group the real-time recorded data of the total water parameters according to the acquisition time period, analyze the salinity S, total nitrogen TN and total phosphorus TP to generate single-numbered salt adjustment signals and multi-level signals. The water parameter analyzer performs the following intra-cycle analysis on the received total water parameters: The total water parameters are based on the pH value, salinity S, total nitrogen TN and total phosphorus TP in the tail water of the multi-parameter water quality monitoring buoy. Data is collected every 15 minutes to construct a collection cycle, and each collection cycle is marked with a group number F1, F2, F3, ..., Fn, where n is a natural number greater than zero; The salinity in a single group is formulated according to the linear regression model, which converts salinity based on conductivity. The specific formula is: S=a×EC+b; Wherein, EC is the conductivity μS / CM, a and B are experimental ratio analysis coefficients, and different salinities, such as 3‰, 5‰, and 7‰, are prepared in the laboratory, and the conductivity EC is measured. The coefficients are obtained by linear regression analysis, a= 0.00147 and b=-0.133, but not limited to this; By measuring the conductivity of the water body and substituting it into the formula to calculate the salinity, it is determined whether it exceeds the tolerance range of aquaculture, and the pre-stored salt is taken from the tailwater complex supervision center. 百分比 Threshold: If salinity < salt 百分比 threshold, no salinity adjustment is required; If salinity > salt 百分比 threshold, it is determined that the salinity needs to be regulated within the collection period. 百分比 Difference between thresholds 盐差量 Generates a targeted single-number salt-adjusted signal that includes the difference 盐差量 , and send it to the control decision module. After receiving the single-numbered salt adjustment signal, the control decision module immediately generates a "number ** / salinity abnormality / alarm reminder" style text and displays it on the display screen of the tailwater complex supervision center, accompanied by a "drip, drip, drip" alarm prompt sound at an interval of 2 seconds to remind the supervisor to proceed. At the same time, the salinity abnormality plan stored in the tailwater complex supervision center is activated, the electric valves of the inlet and outlet channels are opened to keep the tailwater flowing, and the fresh water dilution pump is started to reduce the salinity.

[0025] The analysis process of excessive nitrogen and phosphorus content based on total water parameters is as follows: Retrieve the total nitrogen TN and total phosphorus TP in a single group number, and calculate the nitrogen and phosphorus excess rate formula based on the mathematical multiplication and division ratio: , ; The standard values ​​of aquaculture tailwater discharge were obtained from the tailwater complex supervision center for comparison and analysis with the TN and TP excess rates: If the TN exceeding rate is greater than the standard value, and the TP exceeding rate is less than the standard value, a first-level signal is generated; If the TN exceeding rate is less than the standard value, and the TP exceeding rate is greater than the standard value, a secondary signal is generated; If the TN exceedance rate > standard value, and the TP exceedance rate > standard value, a level 3 signal is generated; Sending the generated signal to the regulation decision module; After receiving the single-number salt adjustment signal and the first-level signal, the control decision module determines the difference between the single-number salt adjustment signal and the first-level signal. 盐差量 , open the electric valves of the water inlet and outlet channels to increase the contact time between the flowing water and the plants inside the breeding field 1, start the fresh water dilution pump, and add a certain amount of phosphorus during the fresh water dilution period to maintain the balance of nitrogen and phosphorus; After receiving the single-number salt adjustment signal and the secondary signal, the control decision module determines the difference between the single-number salt adjustment signal and the secondary signal. 盐差量 , open the electric valves of the water inlet and outlet channels to increase the contact time between the flowing water and the plants inside the breeding field 1, start the fresh water dilution pump, and add a certain amount of nitrogen during the fresh water dilution period to maintain the nitrogen and phosphorus balance; After receiving the single-number salt adjustment signal and the third-level signal, the control decision module 盐差量 , start the fresh water dilution pump, and the control decision module opens the electric valves of the inlet and outlet channels according to the three-level signal to increase the contact time between the flowing water and the plants in the breeding field 1, so as to promote the uniform mixing of nitrogen and phosphorus in the tail water and neutralize the total nitrogen and phosphorus proportion in the tail water; it should be noted that: the more the exceeding rate is greater than 1, the more serious the pollution is, which is used to guide the intensity of control. The standard value is based on the aquaculture tail water standard, such as: TN≤1.5mg / L, TP≤0.3mg / L. If the salinity S>5% or the nitrogen and phosphorus exceeding rate is greater than 1, start the fresh water dilution pump or increase the water flow rate in the ecological purification area.

[0026] Embodiment 2: This embodiment is a saline-alkali land aquaculture tailwater recycling treatment system, including an ecological parameter analyzer for analyzing the nitrogen and phosphorus absorption of salt-tolerant plants, tailwater retention time analysis, and filter-feeding organism absorption analysis of the data in the planting cycle parameters. The ecological parameter analyzer performs intra-cycle analysis and processing on the received planting cycle parameters as follows: The growth indicators of salt-tolerant plants in breeding field 1, such as plant height H, coverage rate C, and filter-feeding organism density M, were collected through ecological monitoring poles and stored in corresponding groups according to the collection time. The nitrogen and phosphorus absorption of salt-tolerant plants was calculated: , ; Among them, k 1 and k 2 It is expressed as the nitrogen and phosphorus absorption coefficient of salt-tolerant plants experimentally determined, k 1 The acceptable value is 0.05mg / cm 2 ·d / TN, k 2 The acceptable value is 0.01mg / cm 2 ·d / TP, but not limited to this.

[0027] After obtaining the TN absorption and TP absorption, the tailwater residence time formula is retrieved from the tailwater complex supervision center: ; Among them, t represents the optimization of ecological purification efficiency. Optimizing ecological purification efficiency means adjusting the tailwater residence time or other water parameters to achieve the best removal effect of pollutants in the tailwater by the ecosystem. The ecosystem includes plants, microorganisms, and filter-feeding organisms. The pollutants in the tailwater include nitrogen and phosphorus. V represents the experimental measured value of the water volume in the collection area, and Q represents the tailwater detection flow value.

[0028] The TN collected during this time 实测 TP 实测 Multiply by Q and t to get the nitrogen loading value and phosphorus loading value, specifically nitrogen loading value = TN 实测 ×Q×t, phosphorus loading value = TP 实测 ×Q×t; The combined results of nitrogen and phosphorus loading values ​​are marked as tailwater nitrogen and phosphorus loading, and the plant absorption amount stored in routine tests is retrieved from the tailwater complex supervision center for comparison and analysis with the tailwater nitrogen and phosphorus loading: If the plant absorption is greater than the tailwater nitrogen and phosphorus load, the purification capacity meets the standard; If the plant absorption is less than the tailwater nitrogen and phosphorus load, it means that the plant purification is insufficient, and a nitrogen and phosphorus regulation signal is generated and sent to the regulation decision module; Example: 1. Conditions: Assume that the tailwater TN load is 100 mg / h during a certain period; Plant coverage C = 50%; Plant height H = 20cm; k 1 =0.05mg / cm 2 ·d.

[0029] 2. Calculate the absorption: TN absorption = 0.5 × 20 × 0.05 = 0.5 mg / cm 2 ·d.

[0030] 3. Assignment result: If the area of ​​the ecological purification zone is 1000m², the total absorption capacity is 0.5×1000×10000×10 6 =5000 mg / d; If the daily TN load of the tail water is 6000 mg / d, the absorption is insufficient and it is necessary to increase the plant coverage or optimize the growth conditions.

[0031] After receiving the nitrogen and phosphorus control signal, the control decision module opens the electric valves of the inlet and outlet channels between the breeding field 1 and the water flow channel 2 according to the measured tail water data for generating the tail water nitrogen and phosphorus load data, the difference between the nitrogen and phosphorus content in the tail water data and the plant absorption, and the actual tail water ratio experience, so as to promote the tail water to flow inside the breeding field 1 and the water flow channel 2, and additionally starts the fresh water dilution pump to dilute the tail water.

[0032] The preset tailwater retention time is retrieved from the tailwater complex supervision center and compared with t: If t ≥ the preset tailwater retention time, the purification requirement is met; If t≤the preset tailwater retention time, the purification requirement is not met, a delay signal is generated, and the delay signal is sent to the control decision module; Example: 1. Conditions: The water volume of the ecological purification area is V=1000m³; Tailwater flow rate Q = 100 m³ / h.

[0033] 2. Judgment criteria: Qualification standard: If t≥12 hours, the purification requirements are met; Abnormal situation: If t<12 hours, the stay time needs to be extended.

[0034] 3. Calculate the residence time: =10 hours.

[0035] 4. Result comparison: If t≥12 hours is required, the flow rate needs to be reduced to Q≤83.3 m³ / h.

[0036] After receiving the delay signal, the control decision module immediately generates "area order number ** / delay processing / warning reminder" style text and displays it on the display screen of the tailwater complex supervision center to remind the supervisor and start the plan corresponding to the delay signal to control the opening and closing of the electric valves of the inlet and outlet channels between the breeding field 1 and the water trough 2, delay the tailwater flow rate, replant plants, increase aeration volume, increase dissolved oxygen, promote microbial activity, and release filter-feeding organisms. The specific delay time is set according to the difference between t and the preset tailwater retention time, but is not limited to this.

[0037] The density of filter-feeding organisms M is counted by underwater cameras, combined with the von Bertalanffy growth model of fish to predict the nitrogen and phosphorus absorption capacity, and the pre-stored predicted absorption range is retrieved from the tailwater complex supervision center, according to the product formula: filter-feeding organism absorption = M × daily absorption of a single fish; The predicted uptake range was compared with that of filter-feeding organisms: If the absorption of filter-feeding organisms is within the predicted absorption range, it means that the biological purification of tailwater in this area is qualified; If the absorption of filter-feeding organisms is less than the predicted absorption range, it means that the biological purification of the tailwater in this area fails. The daily absorption of a single fish is the nitrogen and phosphorus content absorbed by each fish in the experimental data; The total absorption is obtained by summing the plant absorption and the absorption of filter-feeding organisms that fail purification: If the total absorption amount ≥ tailwater nitrogen and phosphorus load, it means that the overall tailwater purification meets the standard; If the total absorption amount is ≤ the tailwater nitrogen and phosphorus load, it means that the overall tailwater purification is abnormal, and a biological control signal is generated and sent to the control decision module; After receiving the biological control signal, the control decision module immediately generates text in the format of "area order number ** / filtration suction unqualified / total suction abnormal / alarm reminder" and sends it to the display screen of the tailwater complex supervision center to remind the supervisor to handle it. At the same time, it starts the plan corresponding to the biological control signal, operates the electric valves of the inlet and outlet channels connected between the breeding field 1 and the water flow channel 2, and the fresh water dilution pump, adjusts the tailwater treatment according to the data, accelerates the tailwater flow rate, increases the stocking density, and optimizes the bait.

[0038] In combination with Example 1 and Example 2, the tailwater salinity, nitrogen and phosphorus content and ecological indicators are collected in real time through multi-parameter water quality monitoring buoys and ecological monitoring benchmarks, and water quality anomalies are accurately identified based on the conductivity conversion model and exceedance rate analysis, and control signals are generated to control freshwater dilution pumps, electric valves and other equipment in a linked manner to achieve dynamic compliance with salinity and nitrogen and phosphorus concentrations.

[0039] The system innovatively constructs a closed ecological chain of "plant absorption + biological purification + residence time optimization". By quantifying the nitrogen and phosphorus absorption of plants and the purification capacity of filter-feeding organisms, it automatically adjusts the water flow path, supplements the biological density or extends the residence time to ensure efficient removal of pollutants. The tail water is recycled after purification, reducing water resource consumption and the use of chemical agents. The supervision center realizes full-process management and control through modular integration and graphical interface, supports multi-dimensional data overlay analysis, and adapts to seasonal changes and aquaculture load fluctuations, providing economical, efficient and eco-friendly tail water treatment solutions for saline-alkali land aquaculture.

[0040] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Related accessories include couplings, screws, gears, gaskets and other commonly used mechanical connection components in this field, but are not limited thereto. They are replaced and adapted according to actual use.

[0042] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A saline-alkali land aquaculture tailwater circulation treatment system, comprising a breeding field (1), a water flow trough (2) and a tailwater complex supervision center, characterized in that: An inlet channel and an outlet channel are provided between the aquaculture field (1) and the water trough (2), a deep water area (5) and a slow water area (3) are provided inside the water trough (2), a waterwheel-type aerator (6) is provided on the top of the deep water area (5), a filter dam (4) is provided between the slow water area (3) and the deep water area (5), and a plurality of multi-parameter water quality monitoring buoys and a plurality of ecological monitoring poles are provided inside the aquaculture field (1) and the water trough (2); The tailwater complex supervision center is communicatively connected to a comprehensive parameter acquisition module, a water parameter analyzer, an ecological parameter analyzer and a control decision module; the comprehensive parameter acquisition module collects the total water parameters and planting cycle parameters in the breeding field (1) and the water flow channel (2) in real time according to the cycle, and sends them to the water parameter analyzer and the ecological parameter analyzer respectively; The water parameter analyzer is used to calibrate and group the data recorded in real time in the total water parameters according to the acquisition time period, analyze the salinity S, total nitrogen TN and total phosphorus TP to generate single-numbered salt adjustment signals and multi-level signals, and send them to the control decision module to adjust the mantissa processing process; The ecological parameter analyzer is used to analyze the nitrogen and phosphorus absorption of salt-tolerant plants, tailwater retention time and filter-feeding organism absorption data in the planting cycle parameters, and send the generated nitrogen and phosphorus control signals, delay signals and biological control signals to the control decision module, and regulate the tailwater according to the analysis results.

2. A saline-alkali land aquaculture tail water circulation treatment system according to claim 1, characterized in that: The water parameter analyzer performs the following intra-cycle analysis on the received total water parameters: The total water parameters include pH value, salinity S, total nitrogen TN and total phosphorus TP in the tail water. Data is collected every 15 minutes to construct a collection cycle. The time sequence of each collection cycle is marked as a group number F1, F2, F3, ..., Fn, where n is a natural number greater than zero; The salinity in a single group is formalized according to the linear regression model. The salinity is converted based on the conductivity method. The specific formula is: S=a×EC+b, where EC is the conductivity μS / CM, a and B are the experimental ratio analysis coefficients. The salinity is calculated by measuring the conductivity of the water body and substituting it into the formula to determine whether it exceeds the tolerance range of aquaculture. The pre-stored salt is retrieved from the tailwater complex supervision center. 百分比 Threshold, if salinity > salt 百分比 threshold, it is determined that the salinity needs to be regulated within the collection period. 百分比 Difference between thresholds 盐差量 Generates a targeted, single-numbered salt-modulated signal.

3. A saline-alkali land aquaculture tail water circulation treatment system according to claim 2, characterized in that: The analysis process of excessive nitrogen and phosphorus content based on total water parameters is as follows: Retrieve the total nitrogen TN and total phosphorus TP in a single group number, and calculate the nitrogen and phosphorus excess rate formula based on the mathematical multiplication and division ratio: , , retrieve the aquaculture tailwater discharge standard value from the tailwater complex supervision center and compare and analyze it with the TN exceedance rate and TP exceedance rate. If the TN exceedance rate is greater than the standard value and the TP exceedance rate is less than the standard value, a first-level signal is generated; if the TN exceedance rate is less than the standard value and the TP exceedance rate is greater than the standard value, a second-level signal is generated; if the TN exceedance rate is greater than the standard value and the TP exceedance rate is greater than the standard value, a third-level signal is generated and sent to the control decision module.

4. The saline-alkali land aquaculture tail water circulation treatment system according to claim 1, characterized in that: The ecological parameter analyzer performs intra-cycle analysis and processing on the planting cycle parameters as follows: The growth indicators of salt-tolerant plants in the breeding field (1), such as plant height H, coverage rate C, and filter-feeding organism density M, were collected by ecological monitoring poles and stored in corresponding groups according to the collection time. The nitrogen and phosphorus absorption of salt-tolerant plants was calculated as follows: , Among them, k1 and k2 represent the nitrogen and phosphorus absorption coefficients of salt-tolerant plants experimentally determined. The value of k1 can be 0.05 mg / cm2·d / TN, and the value of k2 can be 0.01 mg / cm2·d / TP.

5. A saline-alkali land aquaculture tail water circulation treatment system according to claim 4, characterized in that: After obtaining the TN absorption and TP absorption, the tailwater residence time formula is retrieved from the tailwater complex supervision center: , where t represents the optimization of ecological purification efficiency. Optimizing ecological purification efficiency means adjusting the tailwater residence time or other water parameters to achieve the best removal effect of pollutants in the tailwater by the ecosystem. The ecosystem includes plants, microorganisms, and filter-feeding organisms. The pollutants in the tailwater include nitrogen and phosphorus. V represents the experimental measured value of the water volume in the collection area, and Q represents the tailwater detection flow value.

6. A saline-alkali land aquaculture tail water circulation treatment system according to claim 5, characterized in that: The TN collected during this time 实测 TP 实测 The nitrogen load value and phosphorus load value are obtained by multiplying with Q and t respectively, and the combined result of the nitrogen load value and the phosphorus load value is marked as the tailwater nitrogen and phosphorus load. The plant absorption amount stored in the routine test is retrieved from the tailwater complex supervision center for comparison and analysis with the tailwater nitrogen and phosphorus load. If the plant absorption amount is greater than the tailwater nitrogen and phosphorus load, the purification capacity meets the standard; if the plant absorption amount is less than the tailwater nitrogen and phosphorus load, it means that the plant purification is insufficient, and a nitrogen and phosphorus regulation signal is generated and sent to the regulation decision module; The preset tailwater retention time is retrieved from the tailwater complex supervision center for comparison with t. If t≥the preset tailwater retention time, the purification demand is met; if t≤the preset tailwater retention time, the purification demand is not met, a delay signal is generated, and the delay signal is sent to the control decision module.

7. A saline-alkali land aquaculture tail water circulation treatment system according to claim 6, characterized in that: The density of filter-feeding organisms M is counted by underwater cameras, combined with the von Bertalanffy growth model of fish to predict the nitrogen and phosphorus absorption capacity, and the pre-stored predicted absorption range is retrieved from the tailwater complex supervision center. According to the product formula: filter-feeding organism absorption = M × single fish daily absorption, the predicted absorption range is compared with the filter-feeding organism absorption. If the filter-feeding organism absorption is within the predicted absorption range, it means that the tailwater biological purification in this area is qualified. If the filter-feeding organism absorption is less than the predicted absorption range, it means that the tailwater biological purification in this area is unqualified. The single fish daily absorption is the nitrogen and phosphorus content absorbed by each fish in the experimental data; The plant absorption amount is obtained and the absorption amount of the filter-feeding organisms that fail the purification is summed to obtain the total absorption amount. If the total absorption amount is ≥ the tail water nitrogen and phosphorus load, it means that the overall tail water purification meets the standard. If the total absorption amount is ≤ the tail water nitrogen and phosphorus load, it means that the overall tail water purification is abnormal, and a biological control signal is generated and sent to the control decision module.

8. A working method of a saline-alkali land aquaculture tail water circulation treatment system, used in the saline-alkali land aquaculture tail water circulation treatment system according to any one of claims 1 to 7, characterized in that: The following steps are involved: Water quality testing: Real-time data monitoring and collection of tailwater from aquaculture fields (1) and water troughs (2) is performed using multi-parameter water quality monitoring buoys and ecological monitoring poles; Data processing: By analyzing the total water parameters and plant cycle parameters of the collected data, the salinity, nitrogen and phosphorus exceeding standard rate, plant purification efficiency and filter feeding biological absorption efficiency are calculated through formulas; Control and relief: According to the analysis results, the electric valve, fresh water dilution pump and waterwheel aerator are controlled in a linked manner to achieve dynamic control of tailwater salinity and nitrogen and phosphorus concentrations; Data display: The tailwater complex supervision center displays abnormal data areas through a graphical interface to assist manual intervention.

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