Multi-stage efficient aquaculture tail water treatment device

Abstract

The utility model provides a multistage efficient culture tail water treatment device, which relates to the technical field of tail water treatment equipment, and comprises a culture tail water pool, a microfilter, an SND reactor, a biological fluidized bed, an ecological floating bed and a solid-liquid separator, the submersible sewage pump pumps tail water in the breeding tail water pool into the microfilter through a pipeline, the tail water filtered by the microfilter is pumped into the SND reactor through a pipeline by the water pump, the effluent of the SND reactor automatically flows into the biological fluidized bed through a pipeline, and the effluent of the biological fluidized bed automatically flows into the ecological floating bed through a pipeline. The device disclosed by the utility model realizes denitrification, dephosphorization, heavy metal removal, organic pollutant removal and suspended matter removal of the culture tail water through the procedures of filtration, nitrification, denitrification, plant absorption, solid-liquid separation and the like, has the characteristics of good effluent quality, low energy consumption, simplicity in operation, reduction of water eutrophication and the like, and can realize up-to-standard discharge of the culture tail water.

Description

Technical Field

[0001] The utility model relates to the technical field of tail water treatment equipment, in particular to a multi-stage high-efficiency aquaculture tail water treatment device. Background Art

[0002] In recent years, the aquaculture industry has developed steadily and rapidly, and factory-based recirculating aquaculture has gradually become the main breeding model. In order to protect the environment, various regions have successively issued the "Aquaculture Tailwater Discharge Standards", which put forward clear requirements on suspended solids, pH value, COD, total nitrogen and total phosphorus content in the tailwater.

[0003] At present, factory-scale recirculating aquaculture produces a large amount of harmful substances. The existing tailwater treatment process basically uses biochemical methods to remove some organic matter, ammonia nitrogen, and nitrite, which cannot meet the requirements of the "Aquaculture Tailwater Discharge Standard". Therefore, it is imperative to design a multi-stage and efficient tailwater treatment equipment. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a multi-stage high-efficiency aquaculture tail water treatment device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a multi-stage high-efficiency aquaculture tailwater treatment device, including an aquaculture tailwater pool, a microfilter, an SND reactor, a biological fluidized bed, an ecological floating bed and a solid-liquid separator. A submersible sewage pump is arranged inside the aquaculture tailwater pool, and the submersible sewage pump pumps the tailwater inside the aquaculture tailwater pool into the microfilter through a pipeline. The tailwater filtered by the microfilter is pumped into the SND reactor through a pipeline by a water pump. The effluent of the SND reactor flows into the biological fluidized bed through a pipeline by gravity, and the effluent of the biological fluidized bed flows into the ecological floating bed through a pipeline by gravity, and the effluent of the ecological floating bed flows into the solid-liquid separator through a pipeline by gravity, and the effluent of the solid-liquid separator is discharged through a pipeline in compliance with the standards.

[0006] The effects achieved by the above components are: by arranging the microfilter, SND reactor, biological fluidized bed, ecological floating bed and solid-liquid separator, the tail water in the aquaculture tailwater pool can enter the microfilter for filtration under the action of the submersible sewage pump, and then the filtered tail water is transported by the water pump to the SND reactor, biological fluidized bed and ecological floating bed for nitrification, denitrification and plant absorption, and then the tail water flows into the solid-liquid separator by gravity for solid-liquid separation. Through the processes of filtration, nitrification, denitrification, plant absorption, solid-liquid separation and the like, the aquaculture tailwater is denitrified, dephosphorized, heavy metals are removed, and organic pollutants and suspended solids are removed. It has the characteristics of good effluent quality, low energy consumption, simple operation, and reduction of eutrophication of water bodies, and can achieve standard discharge of aquaculture tailwater.

[0007] Preferably, the submersible sewage pump is made of stainless steel, and the water pump is made of stainless steel.

[0008] The effects achieved by the above components are: by adopting stainless steel submersible sewage pumps and water pumps, the strength of the submersible sewage pumps and water pumps is improved, while the rust easily generated by the submersible sewage pumps in long-term contact with water is reduced.

[0009] Preferably, the main body of the microfilter is made of PP material, and the filter mesh inside the microfilter is a nylon mesh.

[0010] The effects achieved by the above components are: by using PP material to make the microfiltration machine, its chemical resistance, heat resistance, electrical insulation and wear resistance can be improved, and its use efficiency and life can be improved.

[0011] Preferably, the pipes and pipe fittings are made of polyvinyl chloride material.

[0012] The effects achieved by the above components are: by using polyvinyl chloride materials to make pipes and pipe fittings, their weather resistance and corrosion resistance can be improved, and good electrical insulation, excellent heat resistance, hardness adjustability and flame suppression can be added to them, thereby increasing the service life of the pipes and pipe fittings.

[0013] Preferably, a degradable slow-release carbon source is added inside the SND reactor, and a high-efficiency biological filter material is added inside the SND reactor.

[0014] The effect achieved by the above components is: by adding a degradable slow-release carbon source, electron acceptors and donors for redox reactions can be provided, thereby promoting the degradation and removal of pollutants and improving the degradation and removal efficiency of pollutants in tail water.

[0015] Preferably, a high-efficiency biological filter material is added to the interior of the biological fluidized bed, and the high-efficiency biological filter material may be ceramsite, coke, quartz sand, activated carbon, expanded aluminosilicate, and the like.

[0016] The effect achieved by the above components is: by adding biological filter media, when the water quality and water volume change, the effluent quality can still be maintained at a good level, and the COD removal rate can reach -%. The biological filter media has the functions of intercepting, adsorbing, precipitating and degrading suspended organic matter and odor in sewage.

[0017] Preferably, the water surface of the ecological floating bed is cultivated with higher aquatic plants or improved and domesticated terrestrial herbs and woody plants.

[0018] The effect achieved by the above components is: by setting up ecological floating beds and cultivating higher aquatic plants or improved and domesticated terrestrial herbs and woody plants, the pollutants in the tail water can be absorbed by plants, so as to achieve the effect of auxiliary purification of the tail water quality.

[0019] Preferably, an inclined plate or inclined tube filler is installed inside the solid-liquid separator, and a solid discharge pipe and a liquid discharge pipe are provided on one side of the solid-liquid separator.

[0020] The effect achieved by the above components is: by setting an inclined plate inside the solid-liquid separator, the pollutant solids filtered out of the tail water and the tail water that meets the standards can be separated, and then discharged through the solid discharge pipe and the liquid discharge pipe respectively.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are:

[0022] In the utility model, through the processes of filtration, nitrification, denitrification, plant absorption, solid-liquid separation and the like, the aquaculture tail water can be denitrified, dephosphorized, heavy metals removed, organic pollutants and suspended solids removed, and the utility model has the characteristics of good effluent quality, low energy consumption, simple operation, and reduction of eutrophication of water bodies, and can achieve the standard discharge of aquaculture tail water. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 For this utility model Figure 1 Another perspective of the picture;

[0025] Figure 3 For this utility model Figure 1 Top view of the .

[0026] Legend: 1. Aquaculture tailwater pool; 2. Submersible sewage pump; 3. Microfiltration machine; 4. Water pump; 5. SND reactor; 6. Biological fluidized bed; 7. Ecological floating bed; 8. Solid-liquid separator. DETAILED DESCRIPTION

[0027] Reference Figure 1-3As shown, this embodiment discloses a multi-stage high-efficiency aquaculture tailwater treatment device, including an aquaculture tailwater pool 1, a microfilter 3, an SND reactor 5, a biological fluidized bed 6, an ecological floating bed 7 and a solid-liquid separator 8. A submersible sewage pump 2 is arranged inside the aquaculture tailwater pool 1, and the submersible sewage pump 2 pumps the tailwater inside the aquaculture tailwater pool 1 into the microfilter 3 through a pipeline. The tailwater filtered by the microfilter 3 is pumped into the SND reactor 5 through a pipeline by a water pump 4. The effluent of the SND reactor 5 flows into the biological fluidized bed 6 through a pipeline by gravity, and the effluent of the biological fluidized bed 6 flows into the ecological floating bed 7 through a pipeline by gravity. The effluent of the ecological floating bed 7 flows into the solid-liquid separator 8 through a pipeline by gravity, and the effluent of the solid-liquid separator 8 is discharged through a pipeline in compliance with the standards. By arranging the microfilter 3 , SND reactor 5, biological fluidized bed 6, ecological floating bed 7 and solid-liquid separator 8, so that the tail water in the aquaculture tail water pool 1 can enter the microfiltration machine 3 for filtration under the action of the submersible sewage pump 2, and then the filtered tail water is transported to the SND reactor 5, the biological fluidized bed 6 and the ecological floating bed 7 by the water pump 4 for nitrification, denitrification and plant absorption, and then the tail water flows into the solid-liquid separator 8 for solid-liquid separation. Through the processes of filtration, nitrification, denitrification, plant absorption, solid-liquid separation, etc., the denitrification, dephosphorization, removal of heavy metals, removal of organic pollutants and suspended solids of the aquaculture tail water are achieved. It has the characteristics of good effluent water quality, low energy consumption, simple operation, reduction of eutrophication of water bodies, etc., and can achieve the standard discharge of aquaculture tail water.

[0028] Reference Figure 1 , Figure 2 and Figure 3 As shown, this embodiment discloses that the submersible sewage pump 2 is made of stainless steel, and the water pump 4 is made of stainless steel. By adopting the submersible sewage pump 2 and the water pump 4 of stainless steel, the strength of the submersible sewage pump 2 and the water pump 4 is improved, and at the same time, the submersible sewage pump 2 is easily rusted due to long-term contact with water. The main body of the microfilter 3 is made of PP material, and the filter mesh inside the microfilter 3 is a nylon mesh. By adopting PP material to make the microfilter 3, its chemical resistance, heat resistance, electrical insulation and wear resistance can be improved, thereby improving its use efficiency and lifespan.

[0029] Reference Figure 1 , Figure 2 and Figure 3 As shown, this embodiment discloses that the pipes and pipe fittings are made of polyvinyl chloride materials. By using polyvinyl chloride materials to make pipes and pipe fittings, their weather resistance and corrosion resistance can be improved, and good electrical insulation, excellent heat resistance, hardness adjustability and flame suppression can be added to them, thereby increasing the service life of the pipes and pipe fittings. A degradable slow-release carbon source is added to the interior of the SND reactor 5. A high-efficiency biological filter material is added to the interior of the SND reactor 5. By adding the degradable slow-release carbon source, electron acceptors and donors for redox reactions can be provided, thereby promoting the degradation and removal of pollutants and improving the degradation and removal efficiency of pollutants in the tail water.

[0030] Reference Figure 1 , Figure 2 and Figure 3 As shown, this embodiment discloses that the interior of the biological fluidized bed 6 is added with high-efficiency biological filter material, and the high-efficiency biological filter material can be ceramsite, coke, quartz sand, activated carbon, expanded aluminosilicate, etc. By adding the biological filter material, when the water quality and water quantity change, the effluent water quality can still be maintained in good condition, and the COD removal rate can reach 60-90%. The biological filter material has the functions of intercepting, adsorbing, precipitating and degrading suspended organic matter and odor in the sewage. The water surface of the ecological floating bed 7 is cultivated with higher aquatic plants or improved and domesticated terrestrial herbs and woody plants. By setting the ecological floating bed 7 and cultivating higher aquatic plants or improved and domesticated terrestrial herbs and woody plants, the pollutants in the tail water can be absorbed by plants, so as to achieve the effect of assisting in purifying the quality of the tail water.

[0031] Reference Figure 1 , Figure 2 and Figure 3 As shown, this embodiment discloses that an inclined plate or inclined tube filler is installed inside the solid-liquid separator 8, and a solid discharge pipe and a liquid discharge pipe are arranged on one side of the solid-liquid separator 8. By arranging an inclined plate inside the solid-liquid separator 8, the pollutant solids filtered out of the tail water and the tail water that meets the standards can be separated, and then discharged respectively through the solid discharge pipe and the liquid discharge pipe.

[0032] Working principle: First, the tail water in the aquaculture tail water pool 1 can enter the microfiltration machine 3 for filtration under the action of the submersible sewage pump 2, and then the filtered tail water is transported by the water pump 4 to the SND reactor 5, the biological fluidized bed 6 and the ecological floating bed 7 for nitrification, denitrification and plant absorption. Then the tail water flows into the solid-liquid separator 8 for solid-liquid separation, and after separation, it is discharged through the solid discharge pipe and the liquid discharge pipe respectively to complete the purification of the tail water.

[0033] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model. In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.

Claims

1. A multi-stage high-efficiency aquaculture tailwater treatment device, comprising an aquaculture tailwater pool (1), a microfilter (3), an SND reactor (5), a biological fluidized bed (6), an ecological floating bed (7) and a solid-liquid separator (8), characterized in that: A submersible sewage pump (2) is arranged inside the aquaculture tailwater pool (1). The submersible sewage pump (2) pumps the tailwater inside the aquaculture tailwater pool (1) into a microfilter (3) through a pipeline. The tailwater filtered by the microfilter (3) is pumped into an SND reactor (5) through a pipeline by a water pump (4). The effluent of the SND reactor (5) flows into a biological fluidized bed (6) through a pipeline. The effluent of the biological fluidized bed (6) flows into an ecological floating bed (7) through a pipeline. The effluent of the ecological floating bed (7) flows into a solid-liquid separator (8) through a pipeline. The effluent of the solid-liquid separator (8) is discharged in compliance with the standards through a pipeline.

2. A multi-stage high-efficiency aquaculture tailwater treatment device according to claim 1, characterized in that: The submersible sewage pump (2) is made of stainless steel, and the water pump (4) is made of stainless steel.

3. A multi-stage high-efficiency aquaculture tailwater treatment device according to claim 2, characterized in that: The main body of the microfilter (3) is made of PP material, and the filter mesh inside the microfilter (3) is a nylon mesh.

4. A multi-stage high-efficiency aquaculture tailwater treatment device according to claim 3, characterized in that: The pipes and pipe fittings are made of polyvinyl chloride material.

5. A multi-stage high-efficiency aquaculture tailwater treatment device according to claim 4, characterized in that: A degradable slow-release carbon source is added inside the SND reactor (5), and a high-efficiency biological filter material is added inside the SND reactor (5).

6. A multi-stage high-efficiency aquaculture tailwater treatment device according to claim 1, characterized in that: The water surface of the ecological floating bed (7) is cultivated with higher aquatic plants or improved and domesticated terrestrial herbs and woody plants.

7. A multi-stage high-efficiency aquaculture tailwater treatment device according to claim 1, characterized in that: An inclined plate or inclined tube filler is installed inside the solid-liquid separator (8), and a solid discharge pipe and a liquid discharge pipe are arranged on one side of the solid-liquid separator (8).

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