A tail water management and treatment method for a continuous culture pond

Abstract

The application discloses a tail water pipe control and treatment method for a continuous breeding pond, comprising: a plurality of breeding ponds, a tail water purification system and an intelligent control system, each breeding pond is connected with the tail water purification system pipe network through a pipeline, the tail water purification system at least has a water inlet, a water outlet and a backflow pipe; the intelligent control system comprises: a data operation module, a water quality monitoring module, a water release control module, an execution module and a tail water treatment module, the method can reasonably allocate the water discharge and water supplement of the pond according to the treatment capacity of the tail water and the pollution degree of the pond water, and can also backflow treat the tail water which does not meet the purification standard, so that the water product breeding tail water mode of zero pollution and zero emission is realized.

Description

Technical Field

[0001] This invention relates to the field of aquaculture wastewater treatment technology, specifically to a method for controlling and treating wastewater from contiguous aquaculture ponds. Background Technology

[0002] In recent years, my country's aquaculture industry has developed rapidly, gradually shifting from small-scale, individual farming to large-scale, intensive farming.

[0003] At present, the main methods used are aeration, sedimentation, and filtration to remove metabolic products and feed residues to treat visible pollutants in aquaculture water and purify the water. However, these methods cannot effectively purify aquaculture water to meet discharge standards, nor can they meet the needs of centralized treatment of tailwater from large-scale aquaculture ponds. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method for controlling and treating wastewater from contiguous aquaculture ponds. This method not only rationally allocates drainage and replenishment based on wastewater treatment status and pond water pollution levels, but also allows for the recirculation of substandard wastewater. This essentially achieves a zero-pollution, zero-emission aquaculture wastewater management model.

[0005] The technical solution adopted by this invention to solve the technical problem is as follows:

[0006] Several aquaculture ponds, a wastewater purification system, and an intelligent control system are provided. Each aquaculture pond is connected to the wastewater purification system network via pipelines. The wastewater purification system has at least an inlet, an outlet, and a return pipe.

[0007] The intelligent control system includes:

[0008] The data processing module is used to calculate the first operating parameters based on historical data;

[0009] The water quality monitoring module is used to monitor water quality parameters at the discharge outlets of aquaculture ponds and wastewater purification systems.

[0010] The water discharge control module is used to monitor in real time the water quality index parameters collected from the water quality monitoring module, as well as the flow data of the inlet and outlet. It compares the water quality index parameters of each pond with the treatment capacity data of the tailwater purification pond, calculates the current pollution level of each aquaculture pond, and combines the tailwater purification pond treatment capacity data to obtain the tailwater discharge sequence, discharge volume, and time data of each aquaculture pond.

[0011] The execution module is used to receive instructions from the water discharge control module, execute the discharge sequence, discharge volume and routine operation of each aquaculture pond, and send the effluent from each pond into the collection well of the effluent purification pond through the pipeline for purification treatment.

[0012] The wastewater treatment module compares the first operating parameter with the current water quality index parameter in real time to treat the wastewater. When the data deviation is less than or equal to the preset value, the system adjusts the second operating parameter. When the data deviation is greater than the preset value, the system adjusts the first operating parameter.

[0013] The effluent purification system comprises a collection well, a sedimentation tank, an aeration tank, and an ecological purification tank, connected in sequence. The effluent purification steps include: First, the effluent from the collection well is pumped into the sedimentation tank. Pollutants in the effluent undergo preliminary physical sedimentation and microbial decomposition in the sedimentation tank before flowing into the aeration tank via a primary filtration device. At this stage, the primary filtration device initially traps large particles. Second, after the pollutants in the aeration tank are decomposed and purified by aerobic microorganisms, the effluent then passes through a secondary filtration device into the ecological purification tank, where it traps secondary particles. Third, in the ecological purification tank, residual pollutants are further absorbed, decomposed, and purified by plants and microorganisms. Finally, the effluent is discharged through the drain outlet on the ecological purification tank when the water quality parameters meet preset values; otherwise, it is returned to the collection well via a return pipe for circulation.

[0014] Thanks to the aforementioned technical solutions, the intelligent control system can rationally allocate pond drainage and replenishment based on the treatment status of the wastewater and the degree of pollution in the pond water. This ensures targeted and orderly discharge and enables pre-controlled operation of the aquaculture wastewater treatment system, allowing for the return and reprocessing of substandard wastewater. This achieves a zero-pollution, zero-discharge aquaculture wastewater treatment model. By adjusting parameters accordingly, the impact of influent water quality and wastewater treatment effectiveness on the aquaculture wastewater treatment system is reduced, improving the real-time performance and reliability of the treatment.

[0015] To better achieve the purpose of the invention, the present invention also has the following superior technical solutions:

[0016] In some embodiments, in order to more accurately monitor the pollution level and liquid level of the pond, the water quality monitoring module of the present invention also includes monitoring the liquid level of the aquaculture pond tailwater purification system.

[0017] In some implementations, to gain a more comprehensive understanding of pond pollution, water quality parameters include pH, SS, COD, total nitrogen, ammonia nitrogen, and other parameters.

[0018] In some implementations, depending on the specific circumstances of each aquaculture pond, such as the species, density, and disease status, the intelligent control system of this application also includes the ability for the aquaculture farmer corresponding to the aquaculture pond to submit a priority drainage request through the system. After receiving the request instruction, the system marks the aquaculture pond as a priority for drainage and determines the drainage volume based on the current treatment capacity of the wastewater purification system.

[0019] In some implementations, to be more energy-efficient and environmentally friendly, green power is supplied to aquaculture ponds and wastewater treatment devices to achieve green and low-carbon fish farms. Solar power devices are installed on the wastewater purification system. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the embodiments.

[0021] This invention provides a method for the management and treatment of wastewater from contiguous aquaculture ponds, comprising: several aquaculture ponds, a wastewater purification system, and an intelligent control system. Each aquaculture pond is connected to the wastewater purification system network via pipelines. The wastewater purification system has at least an inlet, an outlet, and a return pipe. The intelligent control system includes: a data processing module for calculating first operating parameters based on historical data; a water quality monitoring module for monitoring water quality parameters of the aquaculture ponds and the outlet of the wastewater purification system; and a water discharge control module for real-time monitoring of the water quality parameters collected by the water quality monitoring module, as well as the flow data of the inlet and outlet, comparing the water quality parameters of each pond, and calculating based on the inlet and outlet flow rates. The system outputs data on the treatment capacity of the wastewater purification pond, calculates the current pollution level of each aquaculture pond, and combines this data with the treatment capacity data to ultimately determine the wastewater discharge sequence, discharge volume, and routine data for each aquaculture pond. The execution module receives instructions from the water discharge control module and executes the wastewater discharge sequence, discharge volume, and routine operations for each aquaculture pond, directing the wastewater from each pond through pipes into the collection well of the wastewater purification pond for purification. The wastewater treatment module compares the first operating parameter with the current water quality index parameters in real time to treat the wastewater. When the data deviation is less than or equal to a preset value, the system adjusts the second operating parameter; when the data deviation is greater than a preset value, the system adjusts the first operating parameter.

[0022] The effluent purification system comprises, in sequence, a collection well, a sedimentation tank, an aeration tank, and an ecological purification tank. The effluent purification steps include: First, effluent from the collection well is pumped into the sedimentation tank. Pollutants in the effluent undergo preliminary physical sedimentation and microbial decomposition in the sedimentation tank before flowing into the aeration tank via a primary filtration device. At this stage, the primary filtration device initially traps large particles. Second, in the aeration tank, pollutants are decomposed and purified by aerobic microorganisms before passing through a secondary filtration device into the ecological purification tank, where secondary filtration traps minor particles. Third, in the ecological purification tank, residual pollutants are further absorbed, decomposed, and purified by plants and microorganisms. Finally, the effluent is discharged through the drain outlet on the ecological purification tank when the water quality parameters meet preset values; otherwise, it is returned to the collection well via a return pipe for circulation.

[0023] In some embodiments, in order to more accurately monitor the pollution level and liquid level of the pond, the water quality monitoring module of the present invention also includes monitoring the liquid level of the aquaculture pond tailwater purification system.

[0024] In some implementations, to gain a more comprehensive understanding of pond pollution, water quality parameters include pH, SS, COD, total nitrogen, ammonia nitrogen, and other parameters.

[0025] In some implementations, to be more energy-efficient and environmentally friendly, green power is supplied to aquaculture ponds and wastewater treatment devices to achieve green and low-carbon fish farms. Solar power devices are installed on the wastewater purification system.

[0026] In some embodiments, the preset value can be a fixed effective intermediate value, and the second operating parameter can include the influent flow rate, return flow rate and aeration rate in the first operating parameter to adjust the second operating parameter, thereby improving the stability of the effluent treatment effect.

[0027] In some embodiments, cattails, water onions, lotus, duckweed, water hyacinth, canna lilies, windmill grass, and foxtail grass are selected as purification plants in the ecological purification pond.

[0028] In some embodiments, water quality parameters include, for example: SS concentration 500–1500 mg / L, average 1000 mg; LCOD Mn Concentrations ranged from 75 to 126 mg / L, with an average of 100 mg / L; TP concentrations ranged from 0.60 to 1.50 mg / L, with an average of 1.20 mg / L; TN concentrations ranged from 5.2 to 13.5 mg / L, with an average of 10 mg / L; and the average pH was 7.

[0029] In some embodiments, the primary and secondary filtration devices may be screens or filter cotton, or filter materials such as quartz stone or ceramic granules.

[0030] In an embodiment of the present invention, the index parameters monitored by the tailwater treatment module can be used as part of the historical data of the data calculation module for data calculation, and can also be used to compare with the first operating parameters to adjust the first operating parameters.

[0031] This invention enables real-time monitoring of water quality and the activity of aquaculture species in ponds. It is equipped with a centralized pond aquaculture wastewater treatment device. Wastewater is collected via a centralized collection pipe and led to the inlet well of the treatment device. A booster pump then pumps the wastewater into a sedimentation tank, where pollutants such as suspended solids (SS), carbon dioxide (COD), total nitrogen (TNT), and ammonia nitrogen undergo physical sedimentation, plant adsorption, absorption, and anaerobic / facultative anaerobic microbial adsorption and decomposition. After passing through a primary filtration device to remove large particles, the wastewater enters an aeration tank, where COD, TNT, and ammonia nitrogen are further decomposed and purified by aerobic microorganisms. Next, after passing through a secondary filtration device to remove large particles, the wastewater enters an ecological purification tank, where residual SS, COD, TNT, and ammonia nitrogen are further absorbed, adsorbed, and decomposed by animals, plants, and microorganisms. Finally, the wastewater is discharged through a discharge outlet after meeting emission standards or reused.

[0032] The wastewater treatment system is equipped with new solar power supply, automatic reflux, external discharge shut-off valve, variable frequency oxygenation device, wastewater quality monitoring device, dissolved oxygen in the aeration tank, and intelligent green plant water replenishment device. A solar power supply is installed on the wastewater tank, providing green power to the aquaculture ponds and the wastewater treatment system. Submerged, emergent, and floating-leaved plants absorb CO2 while purifying the wastewater, achieving carbon emission reduction and creating a green, low-carbon fish farm. The central monitoring and management system collects data from monitoring probes in all aquaculture ponds and from the equipment and instruments in the wastewater treatment system. Equipped with a unique intelligent control system, the system uses a unique algorithm to push data via cloud computing, video, and an app to the mobile phones of every farmer, manager, and regulator. This enables scheduled drainage, intelligent water replenishment and exchange, remote visual monitoring of the health status of aquaculture species, and seamless integration of wastewater treatment and pond drainage, resulting in overall high efficiency, orderliness, and green development.

[0033] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A method for controlling and treating wastewater from contiguous aquaculture ponds, characterized in that, include: Several aquaculture ponds, a wastewater purification system, and an intelligent control system are provided. Each aquaculture pond is connected to the wastewater purification system network through a pipeline. The wastewater purification system has at least an inlet, an outlet, and a return pipe. The wastewater purification system includes a collection well, a sedimentation tank, an aeration tank, and an ecological purification tank connected in sequence. The intelligent control system includes: The data processing module is used to calculate the first operating parameters based on historical data; The water quality monitoring module is used to monitor water quality parameters at the discharge outlets of aquaculture ponds and wastewater purification systems. The water discharge control module is used to monitor in real time the water quality index parameters collected from the water quality monitoring module, as well as the flow data of the inlet and outlet. It compares the water quality index parameters of each pond with the treatment capacity calculation data of the tailwater purification pond, calculates the current pollution level of each aquaculture pond, and combines the tailwater purification system treatment capacity data to obtain the tailwater discharge sequence, discharge volume, and time data of each aquaculture pond. The execution module is used to receive instructions from the water discharge control module, execute the discharge sequence, discharge volume and routine operation of each aquaculture pond, and send the effluent from each pond into the collection well of the effluent purification system through pipelines for purification treatment. The tailwater treatment module compares the first operating parameter with the current water quality index parameter in real time to treat the tailwater. When the data deviation is less than or equal to the preset value, the system adjusts the second operating parameter. When the data deviation is greater than the preset value, the system adjusts the first operating parameter. The tailwater purification system discharges the purified tailwater through the drain outlet on the ecological purification pond. Otherwise, it returns to the collection well through the return pipe for circulation.

2. The method for controlling and treating wastewater from contiguous aquaculture ponds according to claim 1, characterized in that, The water quality monitoring module also includes monitoring the liquid level of the aquaculture pond tailwater purification system.

3. The method for controlling and treating wastewater from contiguous aquaculture ponds according to claim 1, characterized in that, The water quality parameters mentioned include pH, SS, COD, total nitrogen, and ammonia nitrogen.

4. The method for controlling and treating wastewater from contiguous aquaculture ponds according to claim 1, characterized in that, The intelligent control system also allows farmers of aquaculture ponds to submit priority drainage requests through the system. Upon receiving the request, the system marks the aquaculture pond as a priority for drainage and determines the drainage volume based on the current wastewater purification system's processing capacity.

5. The method for controlling and treating wastewater from contiguous aquaculture ponds according to claim 1, characterized in that, The wastewater purification system is equipped with a solar power supply device.

6. The method for controlling and treating wastewater from contiguous aquaculture ponds according to claim 1, characterized in that, The wastewater purification process includes: First, the wastewater from the collection well is pumped into a sedimentation tank using a lift pump. After initial physical settling and microbial decomposition in the sedimentation tank, the pollutants in the wastewater flow into an aeration tank via a primary filtration device. At this stage, the primary filtration device initially traps large particles. Second, in the aeration tank, the pollutants are decomposed and purified by aerobic microorganisms before entering an ecological purification tank via a secondary filtration device. Here, the secondary filtration device traps smaller particles. Third, in the ecological purification tank, the remaining pollutants are further absorbed, decomposed, and purified by plants and microorganisms. Finally, the wastewater is discharged through the drain outlet on the ecological purification tank when the water quality parameters meet preset values; otherwise, it is returned to the collection well via a return pipe for circulation.