A multi-channel in-situ treatment and on-line recycling system for fishery aquaculture wastewater

Abstract

The present invention discloses a multi-channel in-situ treatment and on-line circulation system for fishery culture wastewater, which includes a main body unit; the main body unit includes a first modular unit connected to the first fishery culture pond and located upstream, and a second modular unit connected to the second fishery culture pond and located downstream; a fish migration baffle plate that keeps a distance from both the water level line and the bottom is arranged between the first modular unit and the second modular unit, and the side wall of the water outlet end of the first modular unit, the fish migration baffle plate and the side wall of the water inlet end of the second modular unit form a fish migration area; a fixator is arranged above the fish migration baffle plate, the fixator is connected to an adjustable baffle plate, the adjustable baffle plate has three gears, in the first gear, the free end of the adjustable baffle plate is connected to the top end of the side wall of the water outlet end of the first modular unit, in the second gear, the free end of the adjustable baffle plate is connected to the top end of the fish migration baffle plate, and in the third gear, the free end of the adjustable baffle plate is connected to the top end of the side wall of the water inlet end of the second modular unit.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment and recycling, and particularly relates to a multi-channel in-situ treatment and on-line recycling system for fishery aquaculture wastewater. Background Art

[0002] The pollutants in aquaculture water bodies mainly include organic matters, ammonia nitrogen, nitrite, nitrate, and nutrient salts such as phosphorus. The main characteristics of the water body are large water volume, fewer types of pollutants, and small content changes. Most aquaculture wastewater belongs to slightly polluted water, and the pollution load is relatively low.

[0003] The main treatment methods for aquaculture wastewater include physical, chemical, biological, and ecological methods. As the main physical treatment methods, technologies such as mechanical filtration and aeration have low treatment efficiency; although chemical oxidation has the advantage of high treatment efficiency, it requires specific instruments and equipment, high costs, and is prone to secondary pollution. The biological method for treating aquaculture wastewater mainly uses algae, microorganisms, etc. to absorb and degrade organic matters, nitrogen (N), and phosphorus (P) in aquaculture wastewater. There have been many successful application cases with good treatment effects. Ecological methods such as ecological ponds, ecological ditches, and constructed wetlands are suitable for the characteristics of low pollutant concentration and large wastewater discharge in aquaculture wastewater, and are more suitable for the treatment and water-saving recycling of aquaculture wastewater. In particular, the constructed wetland technology can remove N, P, organic matters, suspended solids (SS), heavy metals, and pathogenic microorganisms in aquaculture wastewater through multiple ways such as matrix filtration, adsorption, precipitation, ion exchange, plant absorption, and microbial metabolism. However, problems such as large floor area, unstable treatment effect in winter, and easy clogging limit the development of the constructed wetland technology and need to be technically innovated to improve the above problems.

[0004] The patent specification with the publication number CN211987491U discloses a tail water treatment device for fishery aquaculture with a layered filtration structure, including a tank body. The top of the tank body is fixedly provided with a feed inlet. A cavity is opened inside the tank body. An annular waste storage bin is arranged at the upper end of the cavity. A first filter cylinder is rotatably installed in the middle of the waste storage bin. The first filter cylinder is driven to rotate by a driving device, and a second filter screen is arranged at the lower end of the first filter cylinder. A waste discharge pipe is fixedly arranged at the left bottom of the waste storage bin. Scrapers cooperating with the first filter cylinder are arranged on both the left and right sides of the waste storage bin. A third filter screen is arranged at the lower end of the waste storage bin. A liquid discharge pipe is fixedly arranged at the bottom of the tank body. This device can achieve the purpose of layered multi-stage treatment, refine the sewage treatment process, and improve the sewage treatment quality. However, this patented technical solution is difficult to achieve in-situ treatment of fishery aquaculture wastewater and cannot take into account problems such as the migration of fish and the movement between fish ponds.

[0005] Currently, the mainstream aquaculture wastewater treatment process combines multiple processes from the above-mentioned physical, chemical, biological, and ecological methods into a "three-pond and two-dam" model. Its main process is to construct three treatment units, namely a sedimentation pond, an aeration pond, and an ecological purification pond, as well as two filter dams. However, this model can no longer meet the water quality requirements of modern fishery aquaculture water bodies due to its occupation of aquaculture water area (the treatment area accounts for 8%-10% of the total aquaculture area), high energy consumption, and unstable water quality reaching the standard, etc.

[0006] Therefore, it is necessary to carry out technological innovation in terms of how the sewage treatment system reduces the occupation of aquaculture water area (increasing the effective fishery aquaculture output), water quality reaching the standard, etc. Summary of the Invention

[0007] Aiming at the deficiencies of traditional technologies in this field, such as the "three-pond and two-dam" model, such as the need to improve the water quality treatment effect and the decrease in aquaculture volume caused by the occupation of aquaculture water area, etc., the present invention provides a multi-channel in-situ treatment and on-line circulation system for fishery aquaculture wastewater. With an anti-blocking constructed wetland as the technical main body, it can integrate sensors, intelligent control systems, etc., so that it can be automatically controlled through big data analysis and target requirements, improving the in-situ treatment efficiency of aquaculture wastewater and ensuring water circulation, synchronously realizing the coupling of different migration channels of fish and treatment requirements, and effectively reducing the investment costs such as operation and maintenance caused by wetland blockage.

[0008] A multi-channel in-situ treatment and on-line circulation system for fishery aquaculture wastewater includes a main unit arranged between two fishery aquaculture ponds;

[0009] The main unit includes a first modular unit connected to the first fishery aquaculture pond and located upstream, and a second modular unit connected to the second fishery aquaculture pond and located downstream;

[0010] Inside the main unit, between the first modular unit and the second modular unit, there is a fish migration baffle plate that maintains a certain distance from both the water level line and the bottom of the main unit. The side wall of the water outlet end of the first modular unit, the fish migration baffle plate, and the side wall of the water inlet end of the second modular unit form a fish migration area; above the fish migration baffle plate, there is a fixer, and an adjustable baffle is connected to the fixer. The adjustable baffle has three gears. In the first gear, the free end of the adjustable baffle is connected to the top end of the side wall of the water outlet end of the first modular unit. In the second gear, the free end of the adjustable baffle is connected to the top end of the fish migration baffle plate. In the third gear, the free end of the adjustable baffle is connected to the top end of the side wall of the water inlet end of the second modular unit;

[0011] Both the first modular unit and the second modular unit are provided with aeration devices, upper fixed perforated plates, lower support perforated plates, and a plurality of baffle plates; porous materials are arranged between the upper fixed perforated plates and the lower support perforated plates;

[0012] At the top of the water inlet end where the first modular unit is connected to the first fish farming pond, at the top of the water outlet end where the second modular unit is connected to the second fish farming pond, and at the top of each baffle plate, there are lifting baffle plates.

[0013] At the bottom of the odd-numbered baffle plates along the water flow direction in the first modular unit and the second modular unit, at the bottom of the side wall of the water outlet end of the first modular unit, and at the bottom of the side walls of the water inlet end and the water outlet end of the second modular unit, water passing grids are provided; the water passing grids at the bottom of the side walls of the water inlet end and the water outlet end of the second modular unit are both equipped with lifting baffle plates for allowing or blocking water passing through the corresponding water passing grids.

[0014] The main body unit can be presented in a rectangular above-ground or semi-underground form, with one or more groups connected in series, parallel, or in a mixed connection method.

[0015] The ratio of the length, width, and height of the main body unit can be 1 - 6:1 - 3:0.6 - 3, and the height does not exceed 3m. The material can be one or a combination of concrete, brick-concrete, stainless steel, carbon steel, and fiberglass. The construction method can be a mixture of one or more of civil engineering, prefabricated components, and modular integral molding.

[0016] The material of the water passing grid can be a combination of one or several of acrylic, fiberglass, and carbon steel plates, and is provided with round holes with a diameter of 10 - 30mm, and the hole opening rate is 40% - 70%.

[0017] Preferably, the area between the upper fixed perforated plate and the lower support perforated plate in each modular unit is not less than 1 / 3 of the total volume of the modular unit where it is located.

[0018] The materials of the upper fixed perforated plate and the lower support perforated plate can be a combination of one or several of carbon steel, fiberglass, and aluminum alloy.

[0019] Preferably, the top surface of the upper fixed perforated plate is more than 20cm lower than the bottom end of the first lifting baffle plate at the water inlet of the main body unit.

[0020] Preferably, the bottom surface of the lower support perforated plate is more than 10cm higher than the top end of the water passing grid.

[0021] Preferably, there are aquatic plants above the upper fixed perforated plate of the first modular unit.

[0022] The aquatic plants can be a combination of one or several of canna, calamus, iris, cyperus alternifolius, thalia dealbata, arundo donax var. versicolor, vetiveria zizanioides, lythrum salicaria, vallisneria natans, potamogeton crispus, potamogeton distinctus, hydrilla verticillata, and ceratophyllum demersum.

[0023] The planting density of the aquatic plants can be 9 - 15 plants / m for emergent plants 2 , and 30 - 120 clusters / m for submerged plants2 。

[0024] The porous material can be one or a combination of several of volcanic rock, zeolite, ceramsite, biochar, and bamboo fiber.

[0025] Preferably, a strengthening treatment material is provided above the lifting baffle at the top of the baffle in the second modular unit.

[0026] The strengthening treatment material can be one or a combination of several of polyurethane, lightweight ceramsite floating module, non-woven fabric, and graphene photocatalytic net.

[0027] The aeration device can include a submersible blower and an aeration pipe or an aeration disk.

[0028] The submersible blower can be fixed at the bottom of the corresponding modular unit, and the power range can be 0.75 - 20 kW, and the flow rate can be 0.5 - 15 m 3 / min, and it can be powered by one or a combination of two of alternating current or solar energy.

[0029] The aeration pipe or the aeration disk can be arranged on or below the lower support perforated plate.

[0030] Optionally, the two ends of the aeration pipe are plugged, and the middle part is evenly opened with holes at an angle of 45° upward every 20 - 50 mm.

[0031] Optionally, the number of aeration disks set is 9 pieces / m 2 。

[0032] Preferably, a first sedimentation tank and a second sedimentation tank are respectively provided at the bottoms of the first modular unit and the second modular unit. Sedimentation nets are provided on both the first sedimentation tank and the second sedimentation tank. The first sedimentation tank and the second sedimentation tank are connected by a connecting pipe, and a sediment lifting pipe valve is arranged at the outlet end of the second sedimentation tank.

[0033] The first sedimentation tank and the second sedimentation tank can be structures with a certain chamber volume and internal load-bearing supports installed at the bottom of the corresponding modular unit, and their materials can be one or a combination of several of brickwork, stainless steel, and carbon steel.

[0034] The sedimentation net can be a panel embedded on the surfaces of the first sedimentation tank and the second sedimentation tank and having a certain hole opening density. The hole opening diameter range of the panel can be 2 - 8 mm, and the material can be one or a combination of several of iron wire, stainless steel, and PVC.

[0035] The diameter of the connecting pipe is preferably not less than 20 mm, and the material can be one or a combination of several of PVC, stainless steel, and aluminum alloy.

[0036] The sediment lift pipe valve can be fixed upward to the main unit or above the water surface of the fishery aquaculture pond through the connection of elbows and pipe networks, facilitating the regular suction and cleaning of sediments.

[0037] Preferably, the multi-channel in-situ treatment and on-line circulation system for fishery aquaculture wastewater also has a self-learning control system.

[0038] The self-learning control system can include water quality and quantity sensors and a data analysis and control system.

[0039] The water quality and quantity sensors can be respectively arranged at the inlet and outlet of the main unit, and can perceive the water quality and quantity of the inlet and outlet in real time, providing data for the data analysis and control system to facilitate the automatic real-time regulation of the operating conditions.

[0040] The water quality and quantity sensors can be configured with one or a combination of several of the flow rate, temperature, pH, conductivity, ORP, SS, DO, COD, ammonia nitrogen, and dissolved phosphorus sensors according to the water quality target requirements and the judgment of the treatment object.

[0041] The data analysis and control system can analyze based on the water quality and quantity data real-time monitored by the water quality and quantity sensors, and realize the automatic regulation of the operating conditions oriented by the target through the real-time monitored data of the inlet water, the preset inlet and outlet removal rate ranges based on the water quality target, the results of big data analysis, or model self-learning.

[0042] The fishery aquaculture pond of the present invention is connected in series before and after the main unit to achieve continuous water inlet and smooth migration channels for fish and the like. The fishery aquaculture pond can be artificially set with different functional areas according to the aquaculture type and the water quality requirements for the aquaculture water body, such as Type I fishery aquaculture ponds with lower water quality requirements and Type II fishery aquaculture ponds with higher water quality requirements.

[0043] The present invention constructs a new multi-channel in-situ treatment and on-line circulation system for fishery aquaculture wastewater, which can efficiently utilize the aquaculture area to obtain more fishery yields, and automatically control according to the aquaculture demand and water quality target to realize the treatment and circulation of aquaculture wastewater, saving the cost and land occupation of tail water treatment. In addition to being applicable to the field of fishery aquaculture wastewater treatment and circulation, the present invention can also be widely used in the fields of slightly polluted surface water treatment, river and lake ecological restoration, etc.

[0044] The main unit of the present invention can be selected from one or a combination of an ecological pond, an ecological ditch, a grassed swale, a surface flow wetland, and a slow-flow river. The present invention can be widely applied to the treatment and circulation of fishery aquaculture wastewater, slightly polluted surface water treatment, advanced treatment of sewage treatment plant tail water, river and lake ecological restoration, domestic sewage treatment, etc.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1) It reduces the land area required for sewage treatment in the existing mode, saves space, and enables in-situ treatment and recycling.

[0047] 2) It synchronously reduces new pollutants such as antibiotics, which can reduce problems such as fish diseases and environmental sanitation.

[0048] 3) It can monitor water quality, water volume concentration in real time according to breeding goals and zoning requirements of the breeding area, and automatically select operating conditions, strengthening the treatment of breeding wastewater while saving energy consumption.

[0049] 4) It has a flexible and diverse setting method, can be used alone or as a backend advanced treatment process, or can be arranged evenly in multiple groups to synchronously achieve the treatment and recycling of breeding wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic structural diagram of a multi-channel in-situ treatment and on-line recycling system for fishery breeding wastewater in an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0052] As Figure 1 shown, the multi-channel in-situ treatment and on-line recycling system for fishery breeding wastewater in this embodiment includes a Type I fishery breeding pond 12, a Type II fishery breeding pond 13, and a main unit 1 provided between these two fishery breeding ponds.

[0053] The main unit 1 includes a first modular unit 2 connected to the Type I fishery breeding pond and located upstream, and a second modular unit 3 connected to the Type II fishery breeding pond 13 and located downstream.

[0054] A fish migration baffle plate 39 is provided between the first modular unit 2 and the second modular unit 3 in the main unit 1, which maintains a certain distance from both the water level line and the bottom of the main unit 1. The side wall of the water outlet end of the first modular unit 2, the fish migration baffle plate 39, and the side wall of the water inlet end of the second modular unit 3 form a fish migration area; a fixer 8 is provided above the fish migration baffle plate 39, and an adjustable baffle 9 is connected to the fixer 8. The adjustable baffle 9 has three gears. In the first gear, the free end of the adjustable baffle 9 is connected to the top end of the side wall of the water outlet end of the first modular unit 2. In the second gear, the free end of the adjustable baffle 9 is connected to the top end of the fish migration baffle plate 39. In the third gear, the free end of the adjustable baffle 9 is connected to the top end of the side wall of the water inlet end of the second modular unit 3. The fixer 8 can be installed above the main unit 1, and different internal water flow channels and fish migration channels in the main unit 1 can be realized by the different positions where the adjustable baffle 9 connected thereto stays.

[0055] Both the first modular unit 2 and the second modular unit 3 are provided with an aeration device, an upper fixed perforated plate 16, a lower support perforated plate 17, and a plurality of baffle plates 18, 19, 20, 21; a porous material 22 is provided between the upper fixed perforated plate 16 and the lower support perforated plate 17.

[0056] Lifting baffles 7, 11, 27, 28, 36, 37 are provided at the top of the water inlet end where the first modular unit 2 is connected to the I-shaped fishery aquaculture pond 12, at the top of the water outlet end where the second modular unit 3 is connected to the II-shaped fishery aquaculture pond, and at the top of each baffle plate 18, 19, 20, 21.

[0057] Water passing grids 29, 33, 30, 32, 35 are provided at the bottoms of the odd-numbered baffle plates 18, 20 along the water flow direction in the first modular unit 2 and the second modular unit 3, at the bottom of the side wall of the water outlet end of the first modular unit 2, and at the bottoms of the side walls of the water inlet end and the water outlet end of the second modular unit 3; the water passing grids 32, 35 at the bottoms of the side walls of the water inlet end and the water outlet end of the second modular unit 3 are both provided with lifting baffles 31, 34 for allowing or blocking the water passing through the corresponding water passing grids 32, 35. The lifting baffles 31, 34 and the water passing grids 32, 35 can be selectively fitted together to control whether water passes through this position.

[0058] Specifically:

[0059] The main body unit 1 can be presented in a rectangular above-ground or semi-underground form in one or more sets in series, parallel, or a mixed connection mode.

[0060] The ratio of the length, width, and height of the main body unit 1 can be 1-6:1-3:0.6-3, and the height generally does not exceed 3m. The material can be one or a combination of concrete, brick-concrete, stainless steel, carbon steel, and fiberglass. The construction method can be one or a mixture of civil engineering, prefabricated components, and modular integral molding.

[0061] The materials of the water passing grids 29, 33, 30, 32, 35 can be one or a combination of acrylic, fiberglass, and carbon steel plates, and are provided with round holes with a diameter of 10-30mm, and the hole opening rate is 40%-70%.

[0062] The area sandwiched between the upper fixed perforated plate 16 and the lower support perforated plate 17 in the first modular unit 2 and the second modular unit 3 is not less than 1 / 3 of the total volume of the modular unit where it is located.

[0063] The materials of the upper fixed perforated plate 16 and the lower support perforated plate 27 can be one or a combination of carbon steel, fiberglass, and aluminum alloy.

[0064] The top surface of the upper fixed perforated plate 16 is at least 20 cm lower than the bottom end of the first lifting baffle 7 at the water inlet of the main body unit 1.

[0065] The bottom surface of the lower support perforated plate 17 is at least 10 cm higher than the tops of the water passing meshes 29, 33, 30, 32, 35.

[0066] There are aquatic plants 23 above the upper fixed perforated plate 16 of the first modular unit 2.

[0067] The aquatic plants 23 can be one or a combination of several of canna, calamus, iris, cyperus alternifolius, thalia dealbata, arundo donax var. versicolor, vetiveria zizanioides, lythrum salicaria, vallisneria natans, potamogeton crispus, potamogeton distinctus, hydrilla verticillata, ceratophyllum demersum.

[0068] The planting density of the aquatic plants 23 can be 9 - 15 plants / m for emergent plants 2 , and 30 - 120 clusters / m for submerged plants 2 .

[0069] The porous material 22 can be one or a combination of several of volcanic rock, zeolite, ceramsite, biochar, bamboo fiber.

[0070] Above the lifting baffles 36, 37 at the tops of the baffle plates 20, 21 in the second modular unit 3, there is a strengthening treatment material 38.

[0071] The strengthening treatment material 38 can be one or a combination of several of polyurethane, lightweight ceramsite floating module, non-woven fabric, graphene photocatalytic net.

[0072] The aeration device can include a submersible blower 25 and an aeration component 26, and the aeration component 26 can be an aeration pipe or an aeration disc.

[0073] The submersible blower 25 can be fixed at the bottom of the corresponding modular unit, and the power range can be 0.75 - 20 kW, and the flow rate can be 0.5 - 15 m 3 / min, and it can be powered by one or both of AC power or solar power.

[0074] The aeration pipe or the aeration disc can be arranged above or below the lower support perforated plate 17.

[0075] Both ends of the aeration pipe can be plugged, and the middle part can be evenly opened with holes at an angle of 45° upward every 20 - 50 mm.

[0076] The number of aeration discs arranged can be 9 pieces / m 2 .

[0077] The first modular unit 2 and the second modular unit 3 are respectively provided with a first sedimentation tank 4 and a second sedimentation tank 6 at the inner bottom. Sedimentation nets 24 are provided on both the first sedimentation tank 4 and the second sedimentation tank 6. The first sedimentation tank 4 and the second sedimentation tank 6 are connected by a connecting pipe 5, and a sediment lift pipe valve 40 is arranged at the outlet end of the second sedimentation tank 6.

[0078] The first sedimentation tank 4 and the second sedimentation tank 6 can be structures with a certain chamber volume and internal load-bearing supports installed at the bottom of the corresponding modular units. Their materials can be one or a combination of brickwork, stainless steel, and carbon steel.

[0079] The sedimentation net 24 can be a panel embedded on the surfaces of the first sedimentation tank 4 and the second sedimentation tank 6 and having a certain opening density. The opening diameter range of the panel can be 2 - 8 mm, and the material can be one or a combination of iron wire, stainless steel, and PVC.

[0080] The diameter of the connecting pipe 5 is not less than 20 mm, and the material can be one or a combination of PVC, stainless steel, and aluminum alloy.

[0081] The sediment lift pipe valve 40 is fixed upward above the water surface of the main unit 1 or the type I fishery aquaculture pond 12 and the type II fishery aquaculture pond 13 through the connection of elbows and pipe networks, facilitating the regular suction and cleaning of sediments.

[0082] The multi-channel in-situ treatment and on-line circulation system for fishery aquaculture wastewater in this embodiment also has a self-learning control system.

[0083] The self-learning control system includes water quality and quantity sensors 14, 15 and a data analysis and control system 10.

[0084] The water quality and quantity sensors 14, 15 are respectively arranged at the inlet and outlet of the main unit 1. By real-time sensing of the water quality and quantity of the inlet and outlet water, data is provided for the data analysis and control system 10 to facilitate the automatic real-time regulation of the operating conditions.

[0085] The water quality and quantity sensors 14, 15 can be configured with one or a combination of flow, temperature, pH, conductivity, ORP, SS, DO, COD, ammonia nitrogen, and dissolved phosphorus sensors according to the requirements of water quality targets and the judgment of treatment objects.

[0086] The data analysis and control system 10 can analyze based on the water quality and quantity data real-time monitored by the water quality and quantity sensors, and realize the automatic regulation of the operating conditions guided by the target through the real-time monitored data of the inlet water, the preset inlet and outlet removal rate ranges based on water quality targets, the big data analysis results or model self-learning based on algorithms such as Bayesian linear regression and neural network regression.

[0087] In this embodiment, a certain logical method can be adopted through the cooperation among the lifting baffle, the baffle plate, the water passing grid and the adjustable baffle to achieve linkage, so as to form different liquid level differences and in-situ water quality treatment effects.

[0088] In the multi-channel in-situ treatment and on-line circulation system for fishery breeding wastewater of this embodiment, the type-I fishery breeding pond 12 and the main unit 1, and the type-II fishery breeding pond 13 are connected in series front and back to ensure continuous water inlet and unobstructed migration channels for fish and the like. The type-I fishery breeding pond 12 and the type-II fishery breeding pond 13 can be artificially set with different functional areas according to the breeding type and the water quality requirements of the breeding water body, such as the type-I fishery breeding pond 12 with lower water quality requirements and the type-II fishery breeding pond 13 with higher water quality requirements.

[0089] Application Example 1

[0090] The multi-channel in-situ treatment and on-line circulation system for fishery breeding wastewater constructed based on the technical principle of the present invention and the above embodiments is used to treat fishery breeding wastewater. In this application example:

[0091] The main unit is in a rectangular semi-underground series connection mode; the ratio of the length, width and height of the main unit is 6:3:1.2, the material is concrete, and the construction method is a mixture of civil engineering and prefabricated components;

[0092] The fixator is installed above the main unit, and different internal water flow channels and fish migration channels in the main unit are realized by different positions where the adjustable baffle stays;

[0093] The fish migration baffle plate is fixed in the middle inside the main unit and keeps a certain distance from both the water level line and the bottom. Its function is to separate the modular units, and different water flow and fish migration channels are realized by different positions of the adjustable baffle.

[0094] In this case, the adjustable baffle stays at the top of the side wall at the water outlet end of the first modular unit to control the water level, and the main biochemical reaction is controlled in the first modular unit. The internal water flow of the main unit is made smooth through the water passing grid at the bottom of the side wall at the water outlet end of the first modular unit, and at the same time, the fish migration channel is blocked.

[0095] The modular unit has a variable size and is embedded within the main unit. The modular unit, lift baffle, baffle plate, and water-permeable grid can cooperate with the adjustable baffle to adopt a certain logical method (in this case, stopping the adjustable baffle at the top of the side wall at the water outlet end of the first modular unit) to achieve linkage and form an in-situ water quality enhancement effect. The lift baffle is divided into two styles, fixed to the upper and lower parts of the modular unit. The baffle plate is fixed to the side of the modular unit and is arranged successively along the water flow direction. The bottom is connected to the water-permeable grid to achieve a water-permeable and completely enclosed style. The water-permeable grid is made of acrylic and has round holes with a diameter of 10 mm and an opening ratio of 40%. The lift baffle at the bottom of the side wall at the water inlet end of the second modular unit and the water-permeable grid are not fitted to achieve the water-permeable state at this position (i.e., the second modular unit), giving play to the water quality enhancement effect of the second modular unit. The lift baffle at the bottom of the side wall at the water outlet end of the second modular unit and the water-permeable grid are fitted to close the water-permeable channel at this position, and the water flows out from the upper side to enhance the effect.

[0096] The upper fixed perforated plate and the lower support perforated plate are fixed to the inner side wall of the modular unit. The area formed by their inclusion is 1 / 2 of the total volume, and the material is carbon steel. The upper fixed perforated plate is 25 cm lower than the bottom height of the first lift baffle at the water inlet of the main unit. The lower support perforated plate is 15 cm higher than the top height of the water-permeable grid.

[0097] The aquatic plant system is Thalia dealbata; the planting density of the aquatic plant system is 9 plants / m 2 。

[0098] The porous material is ceramsite; the enhanced treatment material is a lightweight ceramsite floating module.

[0099] The aeration enhancement system includes a submersible blower and an aeration pipe. The submersible blower is fixed to the bottom of the modular unit, with a power range of 0.75 kw and a flow rate of 1.5 m 3 / min, powered by alternating current; the aeration pipe is arranged below the lower support perforated plate and realizes enhanced aeration under the condition that COD Cr is higher than 50 mg / L. The two ends of the aeration pipe are plugged, and the middle part is evenly drilled with holes at an angle of 45° upward every 30 mm.

[0100] The sedimentation tank is a structure installed at the bottom of the modular unit with a certain chamber volume and internal load-bearing support, and its material is carbon steel; the sedimentation net is a panel embedded on the surface of the sedimentation tank with a certain opening density, and the opening diameter range of the panel is 5 mm, and the material is iron wire; the function of the connecting pipe is to connect the sedimentation tanks before and after, and its pipe diameter is 25 mm, and the material is PVC; the sediment lift pipe valve is connected to the last group of sedimentation tanks and is fixed upward above the water surface of the type II fishery aquaculture pond through the connection of elbows and pipe networks, facilitating the regular suction and cleaning of sediments.

[0101] In this case, the water quality and quantity sensor includes a combination of flow rate, temperature, pH, conductivity, ORP, SS, DO, COD, and ammonia nitrogen; the data analysis and control system analyzes based on the water quality and quantity data real-time monitored by the water quality and quantity sensor, and realizes the automatic regulation oriented to the operation condition target through the real-time monitored data of the influent water, the range of influent and effluent removal rates preset based on the water quality target, and the self-learning of the big data analysis result based on neural network regression.

[0102] The fishery aquaculture pond is connected in series with the main system before and after, realizing continuous water inflow and smooth migration channels for fish and the like; the water quality requirements for fish in the front fishery aquaculture pond are lower than those in the fishery aquaculture pond connected in series at the back of the main system.

[0103] Application Example 2

[0104] In this case, except that the adjustable baffle is controlled to stay at the fish migration baffle plate, multiple lifting baffle plates in the middle of the second modular unit are lower than the water level line, and the position of the lifting baffle plate at the top of the side wall of the second modular effluent end that controls the final effluent is adjusted downwards so that fish can swim through, all other parameters are the same as those in Application Example 1.

[0105] In this case, the water quality treatment effect of this multi-channel in-situ treatment and on-line circulation system for fishery aquaculture wastewater is slightly lower than that in Application Example 1, but the fish migration channel is opened. Under the synergistic diversion of the right side of the first modular unit and the fish migration baffle plate, fish can swim back and forth smoothly to spawn, saving land and increasing fishery production. At the same time, the synchronous treatment and circulation of aquaculture wastewater can also be realized.

[0106] Application Example 3

[0107] In this case, except that the adjustable baffle is controlled to stay at the fish migration baffle plate, multiple lifting baffle plates in the middle of the second modular unit are lower than the water level line, the position of the lifting baffle plate at the top of the side wall of the second modular effluent end that controls the final effluent is adjusted upwards so that fish cannot swim through, and the strengthening treatment material is set as a graphene photocatalytic net, all other parameters are the same as those in Application Example 1.

[0108] In this case, the water quality is guaranteed by the higher position setting of the strengthening material and the last lifting baffle plate in the second modular unit that controls the final effluent (the water level is higher, and the contact time between the material and the sewage increases), and the risks such as fish diseases are reduced; in addition, the fish are detained before the second modular unit, avoiding swimming into the subsequent fixed-type fishery aquaculture ponds with higher water quality requirements, thus preventing the mixing of fish species.

[0109] In addition, it should be understood that after reading the above description of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A multi-channel in-situ treatment system for fishery aquaculture wastewater, characterized in that, It includes a main unit located between two fishery culture ponds; The main unit includes a first modular unit connected to the first fishery culture pond and located upstream, and a second modular unit connected to the second fishery culture pond and located downstream; Inside the main unit, between the first modular unit and the second modular unit, there is a fish migration baffle plate that maintains a certain distance from both the water level line and the bottom of the main unit. The side wall of the water outlet end of the first modular unit, the fish migration baffle plate, and the side wall of the water inlet end of the second modular unit form a fish migration area; above the fish migration baffle plate, there is a fixator, and an adjustable baffle is connected to the fixator. The adjustable baffle has three gears. In the first gear, the free end of the adjustable baffle is connected to the top end of the side wall of the water outlet end of the first modular unit. In the second gear, the free end of the adjustable baffle is connected to the top end of the fish migration baffle plate. In the third gear, the free end of the adjustable baffle is connected to the top end of the side wall of the water inlet end of the second modular unit; Both the first modular unit and the second modular unit are provided with aeration devices, an upper fixed perforated plate, a lower support perforated plate, and a plurality of baffle plates; there is a porous material between the upper fixed perforated plate and the lower support perforated plate; At the top of the water inlet end where the first modular unit is connected to the first fishery culture pond, at the top of the water outlet end where the second modular unit is connected to the second fishery culture pond, and at the top of each baffle plate, there are liftable baffle plates; At the bottom of the odd-numbered baffle plates along the water flow direction in the first modular unit and the second modular unit, at the bottom of the side wall of the water outlet end of the first modular unit, at the bottom of the side wall of the water inlet end of the second modular unit, and at the bottom of the side wall of the water outlet end, water passing grids are provided; The water passing grid at the bottom of the side wall of the water inlet end of the second modular unit is provided with a liftable baffle plate for allowing or blocking the water passing through the corresponding water passing grid; The water passing grid at the bottom of the side wall of the water outlet end of the second modular unit is provided with a liftable baffle plate. The liftable baffle plate at the bottom of the side wall of the water outlet end of the second modular unit is selectively fitted with the water passing grid to close the water passing channel at this position.

2. The multi-channel in-situ treatment system for fishery aquaculture wastewater according to claim 1, characterized in that, The main unit is presented in a rectangular above-ground or semi-underground form in a series, parallel, or mixed connection mode of one or more groups; The ratio of the length, width, and height of the main unit is 1-6:1-3:0.6-3, and the height does not exceed 3m. The material is one or a combination of concrete, brick-concrete, stainless steel, carbon steel, and fiberglass. The construction method is one or a mixture of civil engineering, precast components, and modular integral molding.

3. The multi-channel in-situ treatment system for fishery aquaculture wastewater according to claim 1, characterized in that, The material of the water passing grid is one or a combination of acrylic, fiberglass, and carbon steel plates, and is provided with round holes with a diameter of 10-30mm, and the hole opening rate is 40%-70%.

4. The multi-channel in-situ treatment system for fishery aquaculture wastewater according to claim 1, characterized in that, The area sandwiched between the upper fixed perforated plate and the lower support perforated plate in each modular unit is not less than 1 / 3 of the total volume of the modular unit where it is located; The materials of the upper fixed perforated plate and the lower support perforated plate are one or a combination of carbon steel, fiberglass, and aluminum alloy; The top surface of the upper fixed perforated plate is 20 cm or more lower than the bottom end of the first liftable baffle plate at the water inlet of the main unit; The bottom surface of the lower support perforated plate is 10 cm or more higher than the top end of the water passing grid.

5. The multi-channel in-situ treatment system for fishery aquaculture wastewater according to claim 1, characterized in that, There are aquatic plants above the upper fixed perforated plate of the first modular unit; The aquatic plants are one or a combination of several of Canna indica, Acorus calamus, Iris tectorum, Cyperus alternifolius, Thalia dealbata, Arundo donax var. versicolor, Vetiveria zizanioides, Lythrum salicaria, Vallisneria natans, Potamogeton crispus, Potamogeton distinctus, Hydrilla verticillata, Ceratophyllum demersum; The planting density of aquatic plants is 9 - 15 emergent plants per square meter 2 , and 30 - 120 submerged plant clusters per square meter 2 .

6. The multi-channel in-situ treatment system for fishery aquaculture wastewater according to claim 1, characterized in that, The porous material is one or a combination of several of volcanic rock, zeolite, ceramsite, biochar, bamboo fiber; Above the lifting baffle at the top of the baffle plate in the second modular unit, there is a strengthening treatment material; The strengthening treatment material is one or a combination of several of polyurethane, lightweight ceramsite floating module, non-woven fabric, graphene photocatalytic net; 7. The multi-channel in-situ treatment system for fishery aquaculture wastewater according to claim 1, characterized in that, The aeration device includes a submersible blower and an aeration pipe or an aeration disc; The submersible blower is fixed at the bottom of the corresponding modular unit, with a power range of 0.75 - 20 kW and a flow rate of 0.5 - 15 m 3 / min, and is powered by one or a combination of two of AC power or solar power; The aeration pipe or the aeration disc is arranged on or below the lower support perforated plate; Both ends of the aeration pipe are plugged, and the middle part is evenly perforated at an angle of 45° upward every 20 - 50 mm; The number of aeration discs installed is 9 per square meter 2 .

8. The multi-channel in-situ treatment system for fishery aquaculture wastewater according to claim 1, characterized in that, At the bottom of the first modular unit and the second modular unit, there are respectively a first sedimentation tank and a second sedimentation tank. Sedimentation nets are provided on both the first sedimentation tank and the second sedimentation tank. The first sedimentation tank and the second sedimentation tank are connected by a connecting pipe, and a sediment lift pipe valve is arranged at the outlet end of the second sedimentation tank; The first sedimentation tank and the second sedimentation tank are structures with a certain chamber volume and internal load-bearing supports installed at the bottom of the corresponding modular units, and their materials are one or a combination of brick, stainless steel, and carbon steel; The sedimentation net is a panel embedded on the surfaces of the first sedimentation tank and the second sedimentation tank and having a certain opening density. The opening diameter range of the panel is 2 - 8 mm, and the material is one or a combination of iron wire, stainless steel, and PVC; The diameter of the connecting pipe is not less than 20 mm, and the material is one or a combination of PVC, stainless steel, and aluminum alloy; The sediment lift pipe valve is fixed upward above the main unit or the water surface of the fishery culture pond through the connection of elbows and pipe networks, facilitating the regular suction and cleaning of sediments.

9. The multi-channel in-situ treatment system for fishery aquaculture wastewater according to claim 1, wherein, The described multi-channel in-situ treatment system for fishery culture wastewater also has a self-learning control system; The self-learning control system includes water quality and water volume sensors and a data analysis and control system; The water quality and water volume sensors are respectively arranged at the inlet and outlet of the main unit. By real-time sensing of the water quality and water volume of the inlet and outlet, data is provided for the data analysis and control system to facilitate the automatic real-time regulation of the operating conditions; The water quality and water volume sensors need to be configured with one or a combination of flow, temperature, pH, conductivity, ORP, SS, DO, COD, ammonia nitrogen, and dissolved phosphorus sensors according to the judgment of water quality target requirements and treatment objects; The data analysis and control system analyzes based on the water quality and water volume data real-time monitored by the water quality and water volume sensors, and realizes the automatic regulation of the operating conditions target-oriented through the real-time monitored data of the inlet water, the preset inlet and outlet removal rate ranges based on water quality targets, the results of big data analysis, or model self-learning.

Images