A method for purifying water for factory-scale circulating aquaculture

Abstract

The present invention provides a method for purifying water for factory-scale circulating aquaculture, which relates to the field of factory-scale aquaculture. In order to solve the problem of poor water purification effect in current factory-scale aquaculture, a purification unit capable of changing the placement position is configured, wherein various types of purifiers are arranged in layers within the purification unit, and the positions of the various purifiers can be adjusted. The number of purification units arranged and the distribution state of the purifiers within the purification unit are adjusted according to relevant indicators of pollutants in the aquaculture barrel, thereby adjusting the overall purification effect, thereby achieving the effect of quickly adjusting the concentration of pollutants in the aquaculture barrel, responding to the tail water treatment of green and healthy aquaculture, and reducing the risk of disease.

Description

Technical Field

[0001] The present invention relates to the field of factory aquaculture, and in particular to a method for purifying water for factory circulating aquaculture. Background Art

[0002] Multi-layer cage aquaculture is used in large water bodies and large water surfaces, and the stratification is natural stratification using natural biological resources, with less human intervention. Factory aquaculture using breeding barrels increases the breeding density and the amount of feeding. However, high density and high feeding may lead to insufficient dissolved oxygen in the water, deterioration of water quality, and other problems, resulting in lack of oxygen in the breeding barrels. Therefore, a large amount of water exchange is required to ensure water quality.

[0003] Wastewater discharged from factory aquaculture contains large amounts of pollutants such as leftover bait and feces, causing water and soil pollution at the discharge site. Current factory aquaculture plants use marine organisms with different nutritional niches to construct a regional nutritional ecological aquaculture system focused on fish farming, achieving nutrient recycling and self-purification of seawater aquaculture. However, as aquaculture progresses, water quality changes differently in different aquaculture areas. Adjustments within a single aquaculture plant can only be made by adjusting feed amounts and oxygenation levels, and rapid adjustments cannot be made based on water quality changes. For factory aquaculture with a large number of aquaculture tanks, pollutant concentrations within a single aquaculture tank change more rapidly than within a larger aquaculture plant. Furthermore, the non-fish organisms used cannot rapidly proliferate or decrease. Monitoring and adjusting water quality within each aquaculture tank individually, using only feed amounts and oxygenation levels, is inefficient and cannot meet the purification needs of aquaculture plants with rapidly changing pollutant concentrations. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for purifying water for industrial circulating aquaculture in order to solve the problems existing in the prior art.

[0005] The first object of the present invention is to provide a method for purifying water for industrial circulating aquaculture, which adopts the following scheme:

[0006] Place purification monomers into the breeding barrels in the breeding area and monitor the water quality parameters in the breeding barrels;

[0007] According to the obtained water quality index parameters, adjust the purification monomers put in so that the water quality index parameters in the breeding tank tend to the set normal range;

[0008] The adjustment of the deployed purification units includes adjusting the number of purification units and regulating the distribution state of the purification substances in the purification units.

[0009] Furthermore, the purification unit is a mesh container, and multiple types of purification objects are arranged in layers in the purification unit, and the purification objects include mollusks, physical adsorbents and aquatic plants.

[0010] Furthermore, according to the aquaculture species to be placed in the aquaculture barrel, the purifiers in the purification unit are configured so that the mollusks, physical adsorbents and aquatic plants are distributed in sequence from bottom to top.

[0011] Furthermore, before the purification units are put into the breeding barrel, the water quality index parameters in the breeding barrel are measured, and the distribution mode, distribution density and distribution position of the purification units in the breeding barrel are configured.

[0012] Furthermore, the purification units are distributed in the aquaculture tank in a manner of being suspended on the water surface or submerged underwater; the distribution density is adjusted by changing the number of purification units at the same depth position and / or the number of purification units in the same vertical direction; and according to the concentration distribution of pollutants in the water body, the distribution position of the purification units is made close to the position of high concentration pollutants.

[0013] Furthermore, a water quality monitoring element is provided on the purification unit, and water quality index parameters in the breeding tank are obtained through the water quality monitoring element.

[0014] Furthermore, the water quality index parameters include: temperature, pH value, ammonia nitrogen, dissolved oxygen, nitrite and COD.

[0015] Furthermore, each purification unit is provided with a plurality of water quality monitoring elements, which obtain water quality index parameter data and send it to the controller. The controller analyzes the water quality and pollution degree based on the water quality index parameter data and outputs the water quality distribution in the breeding tank.

[0016] Furthermore, the adjustment of the deployed purification units includes: allocating the purification units in normal breeding barrels whose water quality index parameters are within the set normal range to abnormal breeding barrels whose water quality index parameters exceed the standard, thereby increasing the number of purification units in the abnormal breeding barrels.

[0017] Furthermore, after allocation, some purification monomers remain in the normal breeding barrels to maintain the stable operation of water purification in the normal breeding barrels.

[0018] Compared with the prior art, the present invention has the following advantages and positive effects:

[0019] (1) In order to solve the problem of poor water purification effect in factory farming, a purification unit with the ability to change the placement position is configured. Various types of purification materials are arranged in layers in the purification unit, and the positions of various types of purification materials can be adjusted. The number of purification units and the distribution of purification materials in the purification units are adjusted according to the relevant indicators of pollutants in the breeding tank, thereby adjusting the overall purification effect to achieve the effect of quickly adjusting the concentration of pollutants in the breeding tank, responding to the tail water treatment of green and healthy aquaculture, and reducing the risk of disease.

[0020] (2) The aquaculture barrels used in the scenario have the problems of small scale, high density and rapid changes in organic matter concentration. If they cannot be adjusted in time, the water quality in the aquaculture barrels will deteriorate rapidly, causing stress on the aquaculture individuals and increasing the risk of aquatic diseases and death of aquaculture individuals. By configuring purification units and monitoring the water quality in different aquaculture barrels, the appropriate type of purification units and the number of units to be put in are selected according to the monitoring results to purify the circulating water in the aquaculture barrels.

[0021] (3) Place multiple purification units at different locations in the same aquaculture tank and obtain water quality parameters at different locations, obtain the water quality distribution of each area in the aquaculture tank, establish a pollution degree distribution map, and quickly grasp the water quality status in the aquaculture tank.

[0022] (4) The purification unit used in the present invention is not a simple reduction of the existing pond classification cage, but a complete three-layer vertical structure. The three layers of the structure are not only composed of plants, but also animals and physical filtration materials. Therefore, it is essentially a water purification structure used to adjust the factory aquaculture barrels. Different purification unit solutions are established for different aquaculture barrels with different physical and chemical indicators and different aquaculture species. In addition, it can be connected to water quality monitoring equipment and work in coordination. When the indicators change abnormally, the aquaculture purification unit is adjusted to adapt to the purification state required by the aquaculture barrel and improve the purification effect.

[0023] (5) Different from the existing high-density factory-based eel farming system, it adopts a complete factory-based circulating water treatment system, including solid-liquid separation, microfiltration, denitrification, biological filter bed, ultraviolet sterilization, etc., which is a more conventional factory-based farming system configuration. The replaced aquaculture wastewater is extracted and then centrally treated. The key design of the present invention is the in-situ purification of the aquaculture barrels rather than centralized purification. Not only is the facility simple and low-cost, but it also has good adjustable performance.

[0024] (6) On the one hand, the purification unit can be easily replaced and disassembled, and quickly assembled and used. The exterior is a mesh structure, and the entire unit can be quickly fished out or put into the breeding barrel to purify the water quality according to the needs of the breeding barrel. On the other hand, the units in the present invention can be flexibly adjusted. According to the actual breeding process, the number of purification units and the distribution state of the purified materials in the purification units can be adjusted, and the structure and level of the contents of the purification units can be changed. This is suitable for changing the distribution mode, distribution density, and distribution position as needed during factory breeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 This is a schematic diagram of placing purification units in the breeding barrels in Examples 1 and 2 of the present invention.

[0027] Figure 2 Schematic diagram of the purification of monomers in Examples 1 and 2 of the present invention.

[0028] In the figure, 1. Breeding tank, 2. Purification unit, 3. Temperature sensor, 4. Ammonia nitrogen value sensor, 5. Nitrite sensor, 6. COD sensor. DETAILED DESCRIPTION

[0029] Example 1

[0030] In a typical embodiment of the present invention, Figure 1-Figure 2 As shown, a method for purifying water for industrial circulating aquaculture is given.

[0031] Current factory farming, such as multi-layered cage aquaculture and seawater workshop aquaculture, primarily involves large water bodies and surfaces. To treat aquaculture wastewater within these areas, natural biological resources are utilized for natural stratification, degrading ammonia nitrogen, leftover bait, and feces generated during the aquaculture process while simultaneously generating oxygen and food for biomass. However, these systems suffer from poor real-time regulation capabilities and are unsuitable for factory farming using aquaculture tanks. These tanks are smaller than cages and seawater workshops, have higher stocking densities, and fluctuate more rapidly within the tanks. Consequently, existing nutritional ecological aquaculture systems cannot meet the water purification requirements within the tanks.

[0032] Based on this, this embodiment provides a method for purifying water for factory-scale circulating aquaculture, which is equipped with a purification unit 2 that can change the placement position. Various types of purifiers are arranged in layers in the purification unit 2, and the positions of various types of purifiers can be adjusted. The number of purification units 2 and the distribution state of the purifiers in the purification unit 2 are adjusted according to the relevant indicators of the pollutants in the breeding barrel 1, thereby adjusting the overall purification effect to achieve the effect of quickly adjusting the concentration of pollutants in the breeding barrel 1, to cope with the tail water treatment of green and healthy aquaculture, and to reduce the risk of disease.

[0033] The above-mentioned method for purifying water for factory-scale circulating aquaculture will be described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1 The factory-scale recirculating aquaculture water purification method is based on purification units 2. Unlike existing multi-layer cage aquaculture, which is difficult to move, quickly adjust its position, and adjust the species of organisms and non-organisms within the cages, the aquaculture barrels 1 used in this embodiment suffer from small scale, high density, and rapidly changing pollutant concentrations. Failure to adjust these conditions in a timely manner can lead to rapid deterioration of water quality within the aquaculture barrels 1, disrupting the water circulation process inside and outside the aquaculture barrels 1 and inducing aquatic diseases. To address this, this embodiment deploys purification units 2. By monitoring the water quality within different aquaculture barrels 1, the appropriate type and quantity of purification units 2 are selected based on the monitoring results to purify the circulating water within the aquaculture barrels 1.

[0035] In a factory-scale circulating water aquaculture scenario using aquaculture barrels 1, multiple aquaculture barrels 1 are distributed in the same aquaculture area. In order to cope with the circulating water treatment during normal operation of the aquaculture barrels 1, multiple types of purifiers for purifying water are arranged in the purification unit 2, and the multiple types of purifiers are arranged in layers.

[0036] The normal working state of the purification unit 2 after being put into the breeding barrel 1 is taken as an example for introduction. The surface of the purification unit 2 is a mesh structure, such as Figure 2 As shown, it is divided into three layers in the vertical direction: upper, middle and lower. The lower layer is arranged with mollusks to absorb organic matter in the water in the breeding barrel 1; the middle layer is arranged with physical adsorbents to adsorb and collect suspended pollutants in the water; the upper layer is arranged with aquatic plants to absorb ammonia nitrogen and organic matter.

[0037] Specifically, the mollusks arranged in the lower layer can be snails or clams, the physical adsorbents used in the middle layer can be medical stone, activated carbon or volcanic stone, and the aquatic plants used in the upper layer can be water hyacinth, diatoms or green algae.

[0038] When obtaining monitoring parameters, the water quality monitoring element can be arranged on the purification unit 2 to obtain the water quality parameters at the location where the purification unit 2 is placed and its vicinity. Multiple purification units 2 can be placed at different locations in the same breeding barrel 1 and the water quality parameters at different locations can be obtained. The water quality distribution of each area in the breeding barrel 1 can be obtained, and a pollution degree distribution map can be established to quickly grasp the water quality status in the breeding barrel 1.

[0039] Different from the traditional form of directly distributing monitoring elements in the water body, the water quality monitoring elements installed on the purification unit 2 reduce the impact on the aquatic living environment, and can monitor the impact of the purification unit 2 on the water quality near the purification unit 2 after it is placed, obtain monitoring data and analyze it to facilitate subsequent adjustments to the purification unit 2.

[0040] The volume of the breeding barrel 1 is larger than the volume of the purification unit 2. Multiple purification units 2 can be arranged in the same breeding barrel 1 to meet the needs of multi-point monitoring and distributed purification of water bodies. At the same time, the purification unit 2 changes the distribution mode, distribution density, and distribution position as needed. When adjusting the distribution mode, the purification unit 2 can be configured to be suspended on the water surface or sunk underwater, and the purification material filled inside can be adjusted according to its distribution mode; when adjusting the distribution density, the number of positions at the same depth and the number in the same vertical direction can be configured, and the distribution density can be selected according to the pollutant concentration of the water body in the breeding barrel 1. When the pollutant concentration is high, the density of the purification unit 2 in the breeding barrel 1 is increased, and when the pollutant concentration is low, the density of the purification unit 2 in the breeding barrel 1 is reduced; when adjusting the distribution position, the position distribution of the purification unit 2 is adjusted according to the concentration distribution of pollutants in the water body, so that the purification unit 2 approaches the distribution of the high pollutant concentration position.

[0041] Optionally, during the aquaculture process, the water body may experience various conditions, and the purification unit 1 can be adjusted according to the actual conditions. For example, if the water body is highly turbid, the proportion of physically adsorbed substances can be increased; if there is good sunlight during the day, the proportion of aquatic plants can be increased; if the water body has a lot of organic debris and sufficient dissolved oxygen, the proportion of mollusks can also be increased.

[0042] It is applicable to factory farming and can change the distribution mode, distribution density and distribution location as needed, combined with multi-point monitoring and adjusted as needed.

[0043] When the pollutant indicators in some breeding barrels 1 exceed the standard, if they are not adjusted in time, the water quality in the breeding barrels 1 will deteriorate rapidly. In this embodiment, adjusting the purification units 2 put in includes adjusting the number of purification units 2 and adjusting the distribution state of the purification materials in the purification units 2, thereby increasing the number of purification units 2 in the abnormal breeding barrels 1 and increasing the number of purification materials distributed for the pollutants exceeding the standard, quickly improving the purification capacity in the abnormal breeding barrels 1, and quickly processing the pollutants in the breeding barrels 1, so that the monitored pollutant indicators are reduced to the normal range as soon as possible.

[0044] By preparing the purification monomer 2 in advance and quickly putting the required purification monomer 2 into the abnormal breeding barrel 1, the purification monomer 2 can be quickly adjusted, and the abnormal breeding barrel 1 can be purified by using the newly added purification monomer 2 in combination with the adjusted purification monomer 2. This can not only reduce the time for rebuilding a new purification monomer 2, but also ensure that the purification unit put into the abnormal breeding barrel 1 is in a normal operating state, reducing the waiting time for the purification monomer 2 to purify the abnormal breeding barrel 1, and improving the processing efficiency.

[0045] The main indicators for water quality monitoring on purification unit 2 are temperature, pH value, ammonia nitrogen, dissolved oxygen, nitrite, and COD. Corresponding sensors can be used to obtain these indicators, such as temperature sensor 3, ammonia nitrogen sensor 4, nitrite sensor 5, and COD sensor 6. The sensors are connected to a matching energy supply module, signal transceiver module, and control module, and are integrated into purification unit 2. The sensors and their supporting functional modules can all be configured using existing components.

[0046] Adjust the purification unit 2 and the breeding tank 1 according to the water quality monitoring data.

[0047] Take the pH value indicator as an example:

[0048]

[0049] Take the dissolved oxygen value as an example:

[0050]

[0051] Take the example of raising different types of aquatic products in aquaculture tank 1:

[0052]

[0053] Unlike fixed cage aquaculture, the factory-scale recirculating aquaculture water purification method overcomes the problems of cage aquaculture being difficult to move and adjust. The purification unit 2 is a small structure. The purification unit 2 is movable, adjustable, and transformable to meet the needs of water purification. In addition, all layers within the purification unit 2 and the biological composition of each layer are designed according to needs and can be easily changed to play different roles. Compared to the cultivation purpose of cage aquaculture, the purification unit 2 used in this embodiment is not used to purify the products within the purification unit 2, but to treat the tailwater of the green and healthy aquaculture in the aquaculture tank 1, thereby improving the efficiency of factory aquaculture and reducing the risk of disease.

[0054] The essence of pond-graded cage aquaculture involves setting up concentric cages within a pond, using a cage-within-cage model to achieve graded aquaculture of different species. The goal is to fully utilize the pond's space for aquaculture activities. Essentially, it is a multi-level fixed cage system. Each cage contains aquaculture items, many of which are arranged horizontally. During the aquaculture process, due to the characteristics of cage aquaculture, the aquaculture process can easily increase the deposition of organic matter in the pond water, causing pollution. The purification unit 2 in this embodiment is not simply a smaller version of the existing pond-graded cage system, but rather a complete three-layer vertical structure. Its three layers contain not only plants but also animals and physical filtration materials. Therefore, it is essentially a water purification structure used to adjust the physical and chemical parameters of different aquaculture tanks 1, and different purification unit solutions are established for different aquaculture tanks 1 with different physical and chemical parameters and aquaculture species. Furthermore, it can be connected to water quality monitoring equipment for collaborative operation. When abnormal changes in indicators occur, the aquaculture purification unit is adjusted to adapt to the required purification state of the aquaculture tank 1, improving the purification effect.

[0055] In addition, it is different from the existing high-density factory-based eel farming system in that it adopts a complete factory-based circulating water treatment system, including solid-liquid separation, microfiltration, denitrification, biological filter bed, ultraviolet sterilization, etc., which is a more conventional factory-based farming system configuration. The replaced aquaculture wastewater is extracted and then centrally treated. The key design in this embodiment is the in-situ purification of the aquaculture barrel 1, which not only has simple facilities and low costs, but also has good adjustable performance.

[0056] The purification unit 2 and the breeding tank 1 operate in coordination, and multiple organisms coexist and produce in coordination, working together to purify the circulating water breeding environment.

[0057] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for purifying water for industrial circulating aquaculture, characterized in that: include: Place purification monomers into the breeding barrels in the breeding area and monitor the water quality parameters in the breeding barrels; According to the obtained water quality index parameters, adjust the purification monomers put in so that the water quality index parameters in the breeding tank tend to the set normal range; Wherein, adjusting the deployed purification units includes adjusting the number of purification units and adjusting the distribution state of the purification materials in the purification units; The purification unit is a mesh container, and multiple types of purification materials are arranged in layers in the purification unit, including mollusks, physical adsorbents and aquatic plants; According to the aquaculture species to be placed in the aquaculture barrel, the purification materials in the purification unit are configured so that the mollusks, physical adsorbents and aquatic plants are distributed from bottom to top; Before adding the purification monomers into the breeding tank, measure the water quality index parameters in the breeding tank and configure the distribution mode, distribution density and distribution position of the purification monomers in the breeding tank; The purification units are distributed in the aquaculture tank in a manner of being suspended on the water surface or submerged in the water; the distribution density is adjusted by changing the number of purification units at the same depth and / or the number of purification units in the same vertical direction; and the distribution position of the purification units is made closer to the position of high-concentration pollutants according to the concentration distribution of pollutants in the water body; The purification unit is provided with a water quality monitoring element, through which the water quality index parameters in the breeding barrel are obtained.

2. The method for purifying water for industrial circulating aquaculture according to claim 1, wherein: The water quality index parameters include: temperature, pH value, ammonia nitrogen, dissolved oxygen, nitrite and COD.

3. The method for purifying water for industrial circulating aquaculture according to claim 2, wherein: Each purification unit is equipped with multiple water quality monitoring elements, which obtain water quality index parameter data and send it to the controller. The controller analyzes the water quality and pollution level based on the water quality index parameter data and outputs the water quality distribution in the breeding tank.

4. The method for purifying water for industrial circulating aquaculture according to claim 1, wherein: The adjustment of the released purification monomers includes: allocating the purification monomers in the normal breeding barrels whose water quality index parameters are within the set normal range to the abnormal breeding barrels whose water quality index parameters exceed the standard, thereby increasing the number of purification monomers in the abnormal breeding barrels.

5. The method for purifying water for industrial circulating aquaculture according to claim 4, characterized in that: After mixing, some purification monomers remain in the normal breeding barrels to maintain the stable operation of water purification in the normal breeding barrels.

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