Mandarin fish culture tail water deep purification and cyclic utilization method based on biomembrane-constructed wetland cooperation

Abstract

The invention relates to a biological membrane-constructed wetland cooperation-based mandarin fish culture tail water deep purification and cyclic utilization method, which comprises a culture pond, a sedimentation pond, a buffer pond and a purification pond, and the culture pond, the sedimentation pond, the buffer pond and the purification pond are connected together through an ecological ditch; the ecological ditch is of a zigzag water retaining structure, ground cover plants are planted on side slopes of the ditch, emergent aquatic plants such as reeds and cattails are planted in the ditch, and the purification pond comprises a cyclone flow state bio-membrane reactor, a thermoelectric synergistic constructed wetland unit and an ozone ultraviolet disinfection device. The mandarin fish culture tail water deep purification and cyclic utilization method based on biological membrane-artificial wetland cooperation has an efficient purification treatment effect, is small in occupied area, and is especially suitable for mandarin fish culture tail water treatment; and the ozone ultraviolet disinfection device in the purification tank can effectively prevent spreading of diseases such as saprolegniasis and vibriosis.

Description

Technical Field

[0001] The invention relates to a method for deep purification and recycling of mandarin fish aquaculture tail water based on biofilm-constructed wetland collaboration, belonging to the technical field of aquaculture tail water purification. Background Art

[0002] With the deepening implementation of water pollution prevention and control efforts, significant progress has been made in addressing pollution from industrial and domestic wastewater. In contrast, widespread and substantial farmland runoff pollution, due to traditional production practices, a lack of control technology, insufficient funding, and weak management, has become a significant constraint on the continued improvement of aquatic ecological environment quality. In addition to farmland production, aquaculture is also a crucial component of the agricultural and rural economy. The existing artificial wetlands occupy a large area, the treatment effect is unstable in winter, and the tail water after purification still contains some pathogenic bacteria, which can easily induce Saprolegniasis and Vibrio disease in mandarin fish. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a method for deep purification and recycling of mandarin fish aquaculture tail water based on biofilm-constructed wetland synergy.

[0004] The purpose of the present invention can be achieved by the following technical solutions: A method for deep purification and recycling of tailwater from mandarin fish farming based on the synergy of biofilm and artificial wetlands, comprising a breeding pond, a sedimentation pond, a buffer pond, and a purification pond, wherein the breeding pond, the sedimentation pond, the buffer pond, and the purification pond are connected together by an ecological ditch; the ecological ditch adopts a zigzag water retaining structure, and the side slopes of the ditch are planted with ground cover plants, and the ditch interior is planted with emergent plants such as reeds and cattails. The purification pool includes a cyclonic flow biofilm reactor, a thermoelectricity synergistic artificial wetland unit and an ozone ultraviolet disinfection device.

[0005] Furthermore, the cyclonic flow biofilm reactor comprises a spiral flow channel shell, the inner wall of which is provided with flow guide ribs, a self-rotating biological filler cage, a built-in suspended filler, a microporous jet aerator (130), and an aeration volume of 0.5-2.0m 3 / min, the suspended filler (121) is a polyethylene / activated carbon composite porous carrier with a specific surface area of ​​≥800m 2 / m 3 , porosity 90-95%.

[0006] Furthermore, the thermoelectric synergistic artificial wetland unit includes a composite artificial wetland layered temperature control matrix, a built-in carbon fiber heating wire conductive plant cultivation layer, planted with calamus / reed mixed vegetation, a pulse water inlet system, and is controlled by a solenoid valve; the matrix is ​​composed of graphene-modified ceramsite (50-70%) and pyrite particles (30-50%).

[0007] Furthermore, the ozone ultraviolet disinfection device includes an ozone generating unit, a mixing reaction chamber, and an ultraviolet radiation unit. The ozone generating unit adopts a high-voltage discharge ozone generator. The mixing reaction chamber is equipped with a spiral guide plate and a microporous diffuser. The aperture of the microporous diffuser is 10-50 μm, the inclination angle of the spiral guide plate is 30-45°, and the water flow residence time is 2-5 minutes (to achieve efficient mixing of ozone and tail water). The ultraviolet radiation unit includes at least 3 medium-pressure ultraviolet lamps, using medium-pressure ultraviolet lamps, and the ultraviolet lamps are covered with quartz sleeves.

[0008] The present invention provides a method for deep purification and recycling of mandarin fish aquaculture tail water based on biofilm-constructed wetland synergy, which has a high purification effect and occupies a small area. It is particularly suitable for the treatment of mandarin fish aquaculture tail water. The ozone ultraviolet disinfection device in the purification pool can effectively prevent the spread of diseases such as saprolegniasis and vibriosis. DETAILED DESCRIPTION

[0009] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or relationships typically used when the product of the invention is in use. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0010] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0011] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0012] A method for deep purification and recycling of tailwater from mandarin fish farming based on the synergy of biofilm and artificial wetlands, comprising a breeding pond, a sedimentation pond, a buffer pond, and a purification pond, wherein the breeding pond, the sedimentation pond, the buffer pond, and the purification pond are connected together by an ecological ditch; the ecological ditch adopts a zigzag water retaining structure, and the side slopes of the ditch are planted with ground cover plants, and the ditch interior is planted with emergent plants such as reeds and cattails. The purification pool includes a cyclonic flow biofilm reactor, a thermoelectricity synergistic artificial wetland unit and an ozone ultraviolet disinfection device.

[0013] Furthermore, the cyclonic flow biofilm reactor comprises a spiral flow channel shell, the inner wall of which is provided with flow guide ribs, a self-rotating biological filler cage, a built-in suspended filler, a microporous jet aerator (130), and an aeration volume of 0.5-2.0m 3 / min, the suspended filler (121) is a polyethylene / activated carbon composite porous carrier with a specific surface area of ​​≥800m 2 / m 3 , porosity 90-95%.

[0014] Furthermore, the thermoelectric synergistic artificial wetland unit includes a composite artificial wetland layered temperature control matrix, a built-in carbon fiber heating wire conductive plant cultivation layer, planted with calamus / reed mixed vegetation, a pulse water inlet system, and is controlled by a solenoid valve; the matrix is ​​composed of graphene-modified ceramsite (50-70%) and pyrite particles (30-50%).

[0015] Furthermore, the ozone ultraviolet disinfection device includes an ozone generating unit, a mixing reaction chamber, and an ultraviolet radiation unit. The ozone generating unit adopts a high-voltage discharge ozone generator. The mixing reaction chamber is equipped with a spiral guide plate and a microporous diffuser. The aperture of the microporous diffuser is 10-50 μm, the inclination angle of the spiral guide plate is 30-45°, and the water flow residence time is 2-5 minutes (to achieve efficient mixing of ozone and tail water). The ultraviolet radiation unit includes at least 3 medium-pressure ultraviolet lamps, using medium-pressure ultraviolet lamps, and the ultraviolet lamps are covered with quartz sleeves.

[0016] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A method for deep purification and recycling of tail water from mandarin fish aquaculture based on biofilm-constructed wetland synergy, characterized in that: It includes a breeding pond, a sedimentation pond, a buffer pond and a purification pond, which are connected together by an ecological ditch; the ecological ditch adopts a zigzag water retaining structure, and the slopes of the ditch are planted with ground cover plants, and the ditch is planted with emergent plants such as reeds and cattails. The purification pool includes a cyclonic flow biofilm reactor, a thermoelectricity synergistic artificial wetland unit and an ozone ultraviolet disinfection device.

2. The method for deep purification and recycling of tail water from mandarin fish aquaculture based on biofilm-constructed wetland synergy according to claim 1, characterized in that: The cyclonic flow biofilm reactor comprises a spiral flow channel shell, an inner wall of which is provided with flow guide ribs, a self-rotating biological filler cage, a built-in suspended filler, a microporous jet aerator (130), and an aeration volume of 0.5-2.0m 3 / min, the suspended filler (121) is a polyethylene / activated carbon composite porous carrier with a specific surface area of ​​≥800m 2 / m 3 , porosity 90-95%.

3. The method for deep purification and recycling of tail water from mandarin fish aquaculture based on biofilm-constructed wetland synergy according to claim 1, characterized in that: The thermoelectric synergistic artificial wetland unit includes a layered temperature-controlled matrix, a built-in carbon fiber heating wire conductive plant cultivation layer, a calamus / reed mixed vegetation planted, a pulse water inlet system, and is controlled by a solenoid valve; the matrix is ​​composed of graphene-modified ceramsite (50-70%) and pyrite particles (30-50%).

4. The method for deep purification and recycling of tail water from mandarin fish aquaculture based on biofilm-constructed wetland synergy according to claim 1, characterized in that: The ozone ultraviolet disinfection device includes an ozone generating unit, a mixing reaction chamber, and an ultraviolet radiation unit. The ozone generating unit adopts a high-voltage discharge ozone generator. The mixing reaction chamber is equipped with a spiral guide plate and a microporous diffuser. The aperture of the microporous diffuser is 10-50 μm, the inclination angle of the spiral guide plate is 30-45°, and the water flow residence time is 2-5 minutes (to achieve efficient mixing of ozone and tail water). The ultraviolet radiation unit includes at least three medium-pressure ultraviolet lamps, which are covered with quartz sleeves.