Cultivation tail water treatment equipment for synergistically reducing carbon, nitrogen, phosphorus and new pollutants

Abstract

The utility model discloses culture tail water treatment equipment capable of synergistically reducing carbon, nitrogen and phosphorus and new pollutants, which belongs to the technical field of culture tail water treatment and comprises a biochemical pool body, a guide cylinder is mounted at the inner end of the biochemical pool body, and the guide cylinder is mounted in the biochemical pool body. An anaerobic cylinder is mounted on the inner wall of the guide cylinder, one side of the biochemical pool body is communicated with a sewage advanced oxidation pool body, an anaerobic zone is arranged in the anaerobic cylinder, and a mud-water mixed liquid medium between the anaerobic cylinder and the guide cylinder is naturally layered. According to the device, carbon, nitrogen, phosphorus and new pollutants in the breeding tail water can be synergistically reduced in the treatment work, the treatment effect is good, meanwhile, an inner circulating pump and a sludge reflux pump do not need to be used in the work, and the work cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture wastewater treatment, specifically to an aquaculture wastewater treatment device that synergistically reduces carbon, nitrogen, phosphorus, and new pollutants. Background Technology

[0002] In recent years, with the booming development of aquaculture and the continuous expansion of its scale, the discharge of aquaculture wastewater has also increased significantly. During the aquaculture process, the feeding of feed and the excrement of fish result in wastewater containing large amounts of pollutants such as carbon, nitrogen, and phosphorus, as well as new pollutants like antibiotics. Direct discharge of this wastewater without effective treatment will severely pollute the surrounding water environment, leading to eutrophication, excessive algal blooms, disruption of the aquatic ecological balance, and impacting the survival of aquatic organisms and the sustainable use of water resources. Currently, integrated wastewater treatment devices are mainly biological treatment devices. To achieve simultaneous nitrogen and phosphorus removal, the biological process generally adopts the AAO process or a modified version of the AAO process. Traditional A (anaerobic)-A (anoxic)-O (aerobic) processes involve the recirculation of nitrified liquor from the aerobic to the anoxic zone and the recirculation of sludge from the secondary sedimentation tank to the anaerobic zone. This requires the installation of internal circulation pumps and sludge recirculation pumps, which consume a large amount of electricity, resulting in high treatment costs and increasing the economic burden on aquaculture enterprises. At the same time, traditional wastewater treatment devices are difficult to effectively remove new pollutants. These substances are persistent, bioaccumulative, and potentially toxic in the environment, posing a threat to the ecological environment and human health. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides an aquaculture wastewater treatment device that synergistically reduces carbon, nitrogen, phosphorus, and new pollutants. It aims to reduce the energy consumption caused by nitrification liquid recirculation and sludge recirculation in traditional wastewater treatment processes, while also reducing pollutants that are difficult to remove effectively by traditional wastewater treatment devices.

[0004] This utility model is implemented as follows: A wastewater treatment device for synergistic reduction of carbon, nitrogen, phosphorus and new pollutants in aquaculture wastewater includes a biological tank, a guide tube installed at the inner end of the biological tank, an anaerobic tube installed on the inner wall of the guide tube, and a wastewater advanced oxidation tank connected to one side of the biological tank.

[0005] In the preferred embodiment of this utility model, the anaerobic tube contains an anaerobic zone. The sludge-water mixture between the anaerobic tube and the guide tube naturally stratifies, forming an anoxic zone, an anaerobic zone, a surface sludge return zone, and a sludge concentration zone from top to bottom. An aerobic zone is formed between the guide tube and the wall of the biological treatment tank. The aerobic zone is connected to the advanced wastewater oxidation tank via a flow outlet. A flow guide opening is provided on the upper exterior of the guide tube. Raw wastewater enters the anaerobic tube through a sludge suction device, achieving sludge return during this process. Under the action of anaerobic microorganisms within the anaerobic tube, large organic molecules in the raw water are converted into smaller organic molecules, facilitating organic matter decomposition and removal in subsequent units. Part of the sludge and wastewater discharged from the anaerobic tube... Water enters the anoxic zone and mixes with the nitrified liquid returning from the aerobic zone. Denitrification occurs in the anoxic zone, converting nitrates and nitrites into nitrogen gas, thus achieving denitrification and reducing nitrogen pollutants. In the aerobic zone, aeration equipment provides oxygen, and microorganisms decompose organic matter and carry out nitrification, converting ammonia nitrogen into nitrates and nitrites, while reducing phosphorus pollutants. Under the aeration effect in the aerobic zone, some of the mud-water mixture flows back to the anoxic zone through the guide port. After solid-liquid separation in the solid-liquid separation tank, the effluent from the aerobic zone enters the upper part of the advanced wastewater oxidation tank, which is the clear water zone. Ozone is added in the ozone dosing tank. The ozone reacts with the advanced catalytic oxidation packing in the packing tank to generate hydroxyl radicals, which oxidize and decompose new pollutants such as antibiotics, improving the effluent quality.

[0006] In a preferred embodiment of this invention, the anaerobic cylinder is equipped with a sludge suction device. The sludge suction device includes an inlet, an outlet, and a sludge suction port located between the inlet and the outlet. Raw wastewater enters through the inlet of the sludge suction device and exits through the outlet. When the wastewater passes through the sludge suction device at high speed, it draws sludge from the sludge suction port into the sludge suction device, thus achieving sludge recirculation. The outlet of the sludge suction device is lower than the cylinder body of the anaerobic cylinder. The water outlet of the sludge suction device drives the water in the anaerobic cylinder to flow upward. Part of the sludge discharged from the outlet of the anaerobic cylinder settles by gravity or is captured by the guide tube and slides into the anoxic zone, while the other part enters the aerobic zone. The water outlet of the sludge suction device drives the water to flow, making the sludge distribution more uniform.

[0007] In the preferred embodiment of this utility model, an aeration device is provided at the inner end of the biochemical tank. Under the aeration effect of the bottom aeration device, the mud-water mixture in the aerobic zone causes the gas to rise, and part of the mixture passes through the guide hole on the guide tube and enters the anoxic zone to mix with the effluent from the anaerobic tank, thereby realizing the return of nitrification liquid.

[0008] In a preferred embodiment of this utility model, the advanced wastewater oxidation tank includes a solid-liquid separation tank, an ozone dosing tank, a packing tank, and an effluent tank. The solid-liquid separation tank and the biochemical tank are connected through an overflow outlet. The ozone dosing tank is connected to the solid-liquid separation tank, the packing tank is connected to the ozone dosing tank, and the effluent tank is connected to the packing tank. The ozone dosing tank is equipped with an ozone supply device to add ozone into the ozone dosing tank, and ozone oxidation can be catalyzed by ultraviolet irradiation.

[0009] In a preferred embodiment of this invention, an inclined tube packing layer is provided on the inner side of the solid-liquid separation tank.

[0010] In a preferred embodiment of this utility model, a baffle is installed on the inner wall of the packing tank, a catalytic oxidation solid packing is installed at the bottom of the baffle, a fluidized packing is provided at the upper end of the baffle, the baffle is provided with a water passage, the water passage is configured in a double-flange shape, and the water passage is provided with a flow hole. The catalytic oxidation solid packing and the fluidized packing come into contact with the water source to improve the quality of the effluent. The neck of the double-flange water passage and the flow hole are used to improve the contact efficiency between the catalytic oxidation solid packing and the water body, and at the same time collect the gas accumulated below the baffle to avoid short-circuiting.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a wastewater treatment device for the synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants in aquaculture wastewater. During use, the raw wastewater enters the anaerobic tank through a sludge suction device. Under the action of anaerobic microorganisms in the anaerobic tank, large-molecule organic matter is converted into small-molecule organic matter. Part of the sludge and wastewater discharged from the anaerobic tank enters the anoxic zone and mixes with the nitrified liquid returned from the aerobic zone. Denitrification occurs in the anoxic zone, converting nitrates and nitrites into nitrogen gas, thus achieving denitrification. In the aerobic zone, the aeration equipment provides oxygen, and microorganisms decompose organic matter and carry out nitrification, converting ammonia nitrogen into nitrates and nitrites. Part of the mud-water mixture is returned to the anoxic zone through the guide port and enters the solid-liquid separation tank through the overflow port. The wastewater undergoes solid-liquid separation through the inclined tube packing layer. Ozone comes into contact with the advanced catalytic oxidation packing in the packing tank to generate hydroxyl radicals, which oxidize and decompose new pollutants such as antibiotics in the water source, improving the quality of the effluent. This device can synergistically reduce carbon, nitrogen, phosphorus, and new pollutants in aquaculture wastewater during treatment, achieving good treatment results. At the same time, it eliminates the need for internal circulation pumps and sludge return pumps, reducing operating costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of an aquaculture wastewater treatment device for synergistic reduction of carbon, nitrogen, phosphorus and new pollutants provided by an embodiment of this utility model;

[0014] Figure 2 A schematic diagram of the internal structure provided for an embodiment of this utility model;

[0015] Figure 3 Another internal structure diagram provided for an embodiment of this utility model;

[0016] Figure 4 A schematic diagram of the structure of the partition, catalytic oxidation solid packing and fluidized packing provided for embodiments of this utility model.

[0017] In the diagram: 100 - Biological treatment tank body; 110 - Aerobic zone; 120 - Anoxic zone; 130 - Surface sludge return zone; 140 - Sludge thickening zone; 150 - Aeration equipment; 160 - Flow outlet; 200 - Guide tube; 201 - Guide through; 300 - Anaerobic tube; 310 - Anaerobic zone; 320 - Sludge suction device; 400 - Wastewater advanced oxidation tank body; 410 - Solid-liquid separation tank; 420 - Ozone addition tank; 421 - Ozone supply equipment; 430 - Packing tank; 431 - Baffle; 432 - Catalytic oxidation solid packing; 433 - Fluidized packing; 434 - Water passage; 435 - Flow hole; 440 - Effluent tank; 450 - Inclined tube packing layer. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] Please see Figures 1-4The present invention provides a technical solution: an aquaculture wastewater treatment device that simultaneously reduces carbon, nitrogen, phosphorus and new pollutants, including a biological tank 100, a guide tube 200 installed at the inner end of the biological tank 100, an anaerobic tube 300 installed on the inner wall of the guide tube 200, and a wastewater advanced oxidation tank 400 connected to one side of the biological tank 100.

[0020] In some specific implementation schemes, the anaerobic tank 300 contains an anaerobic zone 310. The anaerobic tank 300 and the guide tube 200 are naturally stratified, forming, from top to bottom, an anoxic zone 120, an anaerobic zone 310, a surface sludge return zone 130, and a sludge concentration zone 140. An aerobic zone 110 is formed between the guide tube 200 and the wall of the biological treatment tank 100. The aerobic zone 110 is connected to the advanced wastewater oxidation tank 400 via a flow outlet 160. A guide through-hole 201 is provided on the upper exterior of the guide tube 200. Raw wastewater enters the anaerobic zone 310 of the anaerobic tank 300 through the sludge suction device 320, where large organic molecules are converted into smaller organic molecules by anaerobic microorganisms. Part of the sludge and wastewater discharged from the anaerobic tank 300 enters the anoxic zone 120, where it interacts with the wastewater from the anaerobic tank 300. The nitrified liquid returned from the aerobic zone 110 is mixed and undergoes denitrification in the anoxic zone, converting nitrates and nitrites into nitrogen gas, thus achieving denitrification and reducing nitrogen pollutants. In the aerobic zone 110, the aeration equipment 150 provides oxygen, and microorganisms decompose organic matter and carry out nitrification, converting ammonia nitrogen into nitrates and nitrites, while reducing phosphorus pollutants. Part of the mud-water mixture is returned to the anoxic zone 120 through the guide port 201. After solid-liquid separation in the solid-liquid separation tank 410, the clear water enters the upper part of the advanced wastewater oxidation tank 400, which is the clear water zone. Ozone is added in the ozone addition tank 420. The ozone comes into contact with the advanced catalytic oxidation packing in the packing tank 430 to generate hydroxyl radicals, which oxidize and decompose new pollutants such as antibiotics, improving the quality of the effluent.

[0021] In some specific implementation schemes, the anaerobic tank 300 is equipped with a sludge suction device 320. The sludge suction device 320 includes an inlet, an outlet, and a sludge suction port located between the inlet and the outlet. The raw wastewater enters through the inlet of the sludge suction device 320 and exits through the outlet. When the wastewater passes through the sludge suction device 320 at high speed, it draws sludge from the sludge suction port into the sludge suction device, realizing sludge return. The outlet of the sludge suction device 320 is lower than the body of the anaerobic tank 300. The water effluent from the sludge suction device 320 drives the water in the anaerobic tank 300 to flow upward. Part of the sludge discharged from the outlet of the anaerobic tank 300 settles by gravity or is captured by the guide tube 200 and slides into the anoxic zone 120, while the other part enters the aerobic zone 110. The water effluent from the sludge suction device 320 drives the water to flow, making the sludge distribution more uniform.

[0022] In some specific implementation schemes, an aeration device 150 is installed at the inner end of the biological tank 100. Under the aeration of the mud-water mixture in the aerobic zone 110 by the bottom aeration device 150, the gas rises and some of the mixture passes through the guide port 201 on the guide tube 200 and enters the anoxic zone 120 to mix with the effluent from the anaerobic tank 300, thereby realizing the return of nitrification liquid.

[0023] In some specific implementation schemes, the advanced wastewater oxidation tank 400 includes a solid-liquid separation tank 410, an ozone dosing tank 420, a packing tank 430, and an effluent tank 440. The solid-liquid separation tank 410 and the biological treatment tank 100 are connected through an outlet 160. The ozone dosing tank 420 is connected to the solid-liquid separation tank 410, the packing tank 430 is connected to the ozone dosing tank 420, and the effluent tank 440 is connected to the packing tank 430. The ozone dosing tank 420 is equipped with an ozone supply device 421 to add ozone into the ozone dosing tank 420, and ozone oxidation can be catalyzed by ultraviolet irradiation.

[0024] In some specific implementation schemes, an inclined tube packing layer 550 is provided inside the solid-liquid separation tank 510 to perform solid-liquid separation of sewage.

[0025] In some specific implementations, a baffle 431 is installed on the inner wall of the packing tank 430. A catalytic oxidation solid packing 432 is installed at the bottom of the baffle 431, and a fluidized packing 433 is installed at the top of the baffle 431. The baffle 431 is provided with a water passage 434, which is designed as a double-flange shape. The water passage 434 is provided with a flow hole 435. The catalytic oxidation solid packing 432 and the fluidized packing 433 come into contact with the water source to improve the quality of the effluent. The neck of the double-flange water passage 434 and the flow hole 435 are used to improve the contact efficiency between the catalytic oxidation solid packing and the water body, and at the same time collect the gas accumulated below the baffle 431 to avoid short-circuiting.

[0026] Working principle: Raw wastewater enters the anaerobic zone 310 of the anaerobic tank 300 through the sludge suction device 320. Under the action of anaerobic microorganisms, organic matter is initially decomposed, and some is converted into biogas, etc. Part of the sludge and wastewater discharged from the anaerobic tank 300 enters the anoxic zone 120. The nitrification liquid returned from the anoxic zone 120 undergoes denitrification reaction here, converting nitrate and nitrite into nitrogen gas, thus achieving denitrification. In the aerobic zone 110, the aeration device 150 provides oxygen. Microorganisms decompose organic matter and carry out nitrification reaction, converting ammonia nitrogen into nitrate and nitrite. Part of the sludge-water mixture is returned to the anoxic zone 120 through the guide port 201, and part of the mixture enters the solid-liquid separation tank 410 through the overflow port 160. The wastewater is separated into solid and liquid by the inclined tube packing layer 450. Ozone comes into contact with the advanced catalytic oxidation packing in the packing tank 430 to generate hydroxyl radicals, which oxidize and decompose new pollutants such as antibiotics in the water source, improving the quality of the effluent.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wastewater treatment device for synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants in aquaculture wastewater, characterized in that, It includes a biological treatment tank body, a flow guide cylinder installed inside the biological treatment tank body, the flow guide cylinder being an anaerobic cylinder, and a wastewater advanced oxidation tank body connected to one side of the biological treatment tank body.

2. The aquaculture wastewater treatment equipment for synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants according to claim 1, characterized in that, The anaerobic cylinder contains an anaerobic zone. The mud-water mixture between the anaerobic cylinder and the guide cylinder naturally stratifies, forming an anoxic zone, an anaerobic zone, a surface sludge return zone, and a sludge concentration zone from top to bottom. An aerobic zone is formed between the guide cylinder and the wall of the biological treatment tank. The aerobic zone is connected to the advanced wastewater oxidation tank through a flow outlet. A flow guide through-hole is provided on the upper exterior of the guide cylinder.

3. The aquaculture wastewater treatment equipment for synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants according to claim 1, characterized in that, The anaerobic cylinder is equipped with a sludge suction device.

4. The aquaculture wastewater treatment equipment for synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants according to claim 1, characterized in that, An aeration device is installed at the inner end of the biochemical pool.

5. The aquaculture wastewater treatment equipment for synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants according to claim 2, characterized in that, The advanced wastewater oxidation tank includes a solid-liquid separation tank, an ozone dosing tank, a packing tank, and an effluent tank. The solid-liquid separation tank and the biochemical tank are connected through an outlet. The ozone dosing tank and the solid-liquid separation tank are connected. The packing tank and the ozone dosing tank are connected. The effluent tank and the packing tank are connected.

6. The aquaculture wastewater treatment equipment for synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants according to claim 5, characterized in that, The solid-liquid separation tank is provided with an inclined tube packing layer on its inner side.

7. The aquaculture wastewater treatment equipment for synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants according to claim 6, characterized in that, The inner wall of the packing tank is equipped with a baffle plate, the bottom of which is equipped with catalytic oxidation solid packing, and the top of which is equipped with fluidized packing.

8. The aquaculture wastewater treatment equipment for synergistic reduction of carbon, nitrogen, phosphorus, and new pollutants according to claim 7, characterized in that, The partition is provided with a water passage, which is configured as a double-flare-mouth shape and has overflow holes.

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