Fishery breeding tail water treatment system

Abstract

The utility model provides a fishery breeding tail water treatment system, which is characterized in that a settling pond is connected with a fishery breeding pond and is used for settling residual feed and fish and shrimp feces, a filter material is arranged in the settling pond and is used for adsorbing suspended matter particles, a microwave generation chamber and an ultraviolet ozone generation chamber which can be communicated are arranged in an oxidation digestion pond, a microwave generator is arranged in the microwave generation chamber, and the ultraviolet ozone generation chamber is communicated with the oxidation digestion pond. An ultraviolet ozone generator is arranged in the ultraviolet ozone generation chamber and is used for decomposing ammonia nitrogen, nitrite and pathogenic bacteria, and a water quality sensor is arranged in the clean water tank and is used for monitoring the treated water quality. The treatment system disclosed by the utility model is small in civil engineering workload, and solves the problem that the required matched land area is large in the aquaculture tail water treatment process; the aquaculture tail water treatment system is simple in structure, high in functionality and low in treatment price of each unit of tail water, the problem that the investment cost of aquaculture tail water treatment is high is solved, the treatment effect can reach national and local related emission standards, the aquaculture health problem is solved, and the problem that the aquaculture tail water treatment process is unstable is solved.

Description

Technical Field

[0001] The utility model relates to the field of fishery breeding, in particular to a breeding tail water treatment system. Background Art

[0002] In recent years, the treatment of aquaculture tailwater is still in the exploratory stage. The most commonly used aquaculture tailwater treatment methods in China are mainly biological methods, supplemented by sedimentation tanks, filtration tanks (dams) and other means. The reason is that biological methods can effectively absorb, precipitate and degrade harmful substances in aquaculture tailwater such as ammonia nitrogen, nitrite, leftover bait, fish and shrimp feces. However, the traditional combined system will have the following problems:

[0003] 1. Traditional methods occupy a large area and have high one-time investment costs. This is mainly reflected in the fact that the three-pond and two-dam model generally requires a large amount of civil engineering, and various costs such as construction fees and engineering machinery fees remain high.

[0004] 2. When the traditional methods are actually used, it is difficult to meet the relevant tailwater discharge standards such as DB 31 / 1405-2023 "Shanghai Aquaculture Tailwater Discharge Standards" and DB32 / 4043-2021 "Jiangsu Province Pond Aquaculture Tailwater Discharge Standards", and the treatment effect of ammonia nitrogen and nitrite cannot meet the relevant restriction requirements. The main reason is that the traditional methods generally rely on microbial degradation in the natural environment, and there is no fast and effective means of regulation and control.

[0005] 3. It cannot effectively kill pathogenic bacteria in water, such as Vibrio, Aeromonas punctata, Aeromonas sobria, Aeromonas hydrophila, Pseudomonas fluorescens, Pseudomonas albicans, etc. The main reason is that in the whole treatment process, there is no separate effective disinfection and sterilization equipment or facilities. Even if it is equipped with sodium hypochlorite, potassium permanganate or over-current UV disinfection lamp, there is still a risk of secondary pollution to the environment.

[0006] 4. The biological treatment system requires the excavation of a separate biological filter tank or a large area of ​​farmland, which reduces the land utilization rate. This is mainly reflected in the three-pond and two-dam treatment technology, which generally requires that the area of ​​"three ponds and two dams" of each aquaculture farm should not be less than 8%-10% of the total breeding area. Although the proportions vary for different aquatic products, such as shrimps and crabs, it should be no less than 6%, and the tailwater treatment area of ​​high-pollution species with an annual yield of more than 3,000 catties per mu, such as snakehead, yellow catfish, largemouth sea bass, loach, etc., should not be less than 10% of the breeding water surface area; other medium-pollution species (such as the four major carps, Culter alba, high-density pond-cultured white shrimp, Macrobrachium rosenbergii, etc.) should be no less than 8%.

[0007] 5. Affected by external factors, the treatment effect is unstable. The core of the traditional method is to use microorganisms in the environment to absorb various pollutants in the aquaculture tail water. The disadvantage is that when the external factors such as pH value, temperature, salinity, and oxygen content in the water change, the activity of the microorganisms will inevitably be affected in an unpredictable way, thus affecting the treatment effect of the aquaculture tail water.

[0008] 6. Due to large-scale breeding in recent years, water surface pollution has become serious, and the three ponds, two dams, ecological ditches and other treatment methods cannot effectively solve the problem of aquaculture effluent pollution, which has led to a decrease in breeding density. Summary of the invention

[0009] Purpose of the invention: The purpose of the utility model is to address the deficiencies of the prior art and provide a fishery aquaculture effluent treatment system, so that the problems of ammonia nitrogen, nitrite, pathogenic bacteria, etc. in the aquaculture effluent can be thoroughly solved. At the same time, the sludge generated during the treatment process can be used as fertilizer for green belts in the aquaculture area after drying.

[0010] Technical solution: The utility model is a fishery aquaculture tailwater treatment system, comprising the following connected in sequence:

[0011] A sedimentation tank connected to the fishery breeding pond for settling leftover bait and fish and shrimp feces;

[0012] A filter tank, wherein filter material is provided in the filter tank for absorbing suspended particles;

[0013] The oxidation disinfecting pool is provided with a microwave generating chamber and an ultraviolet ozone generating chamber which can be connected. The microwave generating chamber is provided with a microwave generator, and the ultraviolet ozone generating chamber is provided with an ultraviolet ozone generator for decomposing ammonia nitrogen, nitrite, pathogenic bacteria, and the like.

[0014] A clean water tank is provided with a water quality sensor for monitoring the quality of the treated water.

[0015] Furthermore, the breeding pond is connected to the sedimentation tank through pre-buried pipes and ditches to reduce the flow rate of water.

[0016] Furthermore, a sludge pump is provided at the bottom of the sedimentation tank.

[0017] Furthermore, the filter tank is a slow filter tank, and the filter material includes quartz sand in the upper layer and granular activated carbon in the lower layer.

[0018] Furthermore, the microwave generator includes a magnetron.

[0019] Furthermore, the ultraviolet ozone generator comprises an electrodeless lamp, wherein part of the electrodeless lamp is placed in the water and part of the electrodeless lamp is exposed above the water surface.

[0020] Furthermore, the microwave generating chamber and the ultraviolet ozone generating chamber are separated by a partition, the partition is provided with a through hole, and a mica sheet and a Teflon layer are attached to the through hole.

[0021] Furthermore, the ultraviolet ozone generating chamber is provided with a wind conveying device, an air supply pipeline leading to the oxidation and disinfection pool, and an aeration device. The wind conveying device passes ozone into the treated water through the air supply pipeline and the aeration device.

[0022] Furthermore, the wind transport equipment includes a high-pressure blower or an air compressor.

[0023] Furthermore, the clean water tank is provided with a pipeline connected back to the breeding pond.

[0024] Beneficial effects: The utility model introduces the water from the aquaculture pond into the sedimentation tank for sedimentation, and then enters the filtration tank to adsorb the suspended particles, and then catalytically oxidizes and removes ammonia nitrogen, nitrite, and pathogenic bacteria through the synergistic effect of the microwave, ultraviolet ozone and other principles in the microwave generating chamber and the ultraviolet ozone generating chamber in the oxidation and disinfection pool, and finally enters the clear water tank for water quality monitoring; the utility model treatment system has a small workload of civil engineering, which solves the problem of large supporting land area required in the process of aquaculture tail water treatment; it has strong functionality, and the treatment price of each unit of tail water is low, which reduces the problem of high investment cost of aquaculture tail water treatment, and the treatment effect can meet the national and local relevant emission standards, improves the problem of aquaculture health, and solves the problem of unstable aquaculture tail water treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a framework diagram of the fishery aquaculture tailwater treatment system of the utility model;

[0026] Figure 2 This is a front view of the oxidation and disinfection pool;

[0027] Figure 3 This is a side view of the oxidation and disinfection tank. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is described in detail below, but the protection scope of the utility model is not limited to the embodiments.

[0029] A fishery aquaculture tailwater treatment system, such as Figure 1 As shown, it includes a sedimentation tank 1, a filtration tank 2, an oxidation and disinfection tank 3 and a clean water tank 4 connected in sequence, wherein:

[0030] Sedimentation tank 1 is connected to the fishery breeding pond, which is connected to the sedimentation tank 1 through pre-buried pipes and ditches. In this process, the water flow rate is reduced so that the residual bait and fish and shrimp feces in the breeding tail water are settled at the bottom of the sedimentation tank 1. In addition, a sludge pump is provided at the bottom of the sedimentation tank 1. The sludge pump pumps out the sludge regularly, and the pumped sludge can be used as fertilizer for the green belt of the breeding area after being dried.

[0031] Filter tank 2, filter tank 2 is connected to sedimentation tank 1 through an overflow pipe. In this embodiment, filter tank 2 is a slow filter tank, and the filter material includes quartz sand in the upper layer and granular activated carbon in the lower layer. When other lighter substances in sedimentation tank 1 enter filter tank 2 with the water flow and pass through the upper filter material, larger suspended particles are intercepted, while finer suspended particles are intercepted by adsorption and contact coagulation through contact with filter material particles or attached suspended particles. Some loosely attached intercepted substances flow with water to the next layer of filter material under the action of water flow; illustratively, the particle size of quartz sand and granular activated carbon is 1 mm, and the thickness of the upper and lower filter materials is adjusted in time according to the scale of water treatment.

[0032] The oxidation and disinfection pool 3 is provided with a microwave generating chamber 301 and an ultraviolet ozone generating chamber 302 for decomposing ammonia nitrogen, nitrite and pathogenic bacteria.

[0033] like Figure 2 , 3 As shown, in this embodiment, a microwave generator is provided in the microwave generating chamber 301, and a UV ozone generating chamber 302 is provided with a UV ozone generator partially immersed in water and partially above the water surface, and an aeration device 306. Exemplarily, the microwave generator is a magnetron 303, and the UV ozone generator is an electrodeless lamp 304, which refers to a quartz glass tube containing an inert gas and a small amount of metallic mercury. Specifically, the microwave generating chamber 301 and the UV ozone generating chamber 302 are separated by a stainless steel metal plate 305, and a through hole is provided on the plate, and a mica sheet and several layers of Teflon are attached to the hole, which can allow microwaves to pass through while isolating water vapor. The electromagnetic waves (i.e. microwaves) generated by the magnetron 303 are irradiated to the electrodeless lamp 304 through the penetration hole. A large amount of inert gas and a small amount of mercury beads are filled in the electrodeless lamp 304 to form plasma. When the excited atoms of the plasma return to the ground state, ultraviolet light is radiated. The ultraviolet light then irradiates the oxygen in the air, causing the oxygen molecules to be broken down into hydroxyl free radicals with strong oxidizing properties to form ozone. The generated ozone is dissolved into water through the aeration equipment 306, and the air volume in the chamber where the electrodeless lamp 304 is located becomes smaller, becoming a negative pressure state. Fresh air continues to enter the ultraviolet ozone generation chamber 302 as a new raw material for preparing ozone.

[0034] At the same time, the electromagnetic waves generated by the microwave generator enter the ultraviolet ozone generating chamber 302, and the water body is sterilized by the combined action of the thermal effect and biological effect of the electromagnetic field. The thermal effect of microwaves on bacteria is to change the protein, so that the bacteria lose nutrition, reproduction and living conditions and die. The biological effect of microwaves on bacteria is that the microwave electric field changes the potential distribution of the cell membrane section, affects the electron and ion concentration around the cell membrane, and thus changes the permeability of the cell membrane. As a result, the bacteria are malnourished, cannot metabolize normally, and the cell structure and function are disordered, and the growth and development are inhibited and die. In addition, microwaves can make the nucleic acid RNA and deoxyribonucleic acid DNA of bacteria grow normally and stabilize genetic reproduction, so that a number of hydrogen bonds are relaxed, broken and reorganized, thereby inducing genetic mutations, or chromosome aberrations or even breaks.

[0035] On the other hand, the ultraviolet light generated by the electrodeless lamp 304 refers to the high-energy UV light beam of a specific wavelength with high-efficiency sterilization ability, which can crack the molecular bonds of bacteria in malodorous water bodies, destroy the nucleic acid (DNA) of bacteria, and crack malodorous substances such as ammonia, trimethylamine, hydrogen sulfide, methyl sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide and styrene, sulfide H2S, VOC, benzene, toluene, and the molecular chain structure of xylene, so that the molecular chain of organic or inorganic high molecular malodorous compounds is rapidly degraded and transformed into low molecular compounds such as CO2, H2O, etc., to completely achieve the purpose of deodorization and killing bacteria. The high-energy UV ultraviolet light beam of a specific wavelength is used to quickly decompose the oxygen molecules in the air to produce free oxygen, that is, active oxygen. Because the positive and negative electrons carried by free oxygen are unbalanced, it needs to combine with oxygen molecules to produce sufficient ozone. Use high-energy C-wave ultraviolet light beams and ozone to carry out synergistic decomposition and oxidation reactions on polluted water bodies. As is known to all, ozone has a strong oxidizing effect on organic matter, and has an immediate removal effect on malodorous gases and other organic matter soluble in water. Specifically, the ozone generated in the cavity where the electrodeless lamp 304 is located is pumped into the treated water through a high-pressure fan, an air compressor or other wind conveying equipment, and its flow process is: ultraviolet ozone generating chamber 302, air intake and air intake pipeline of the wind conveying equipment, main unit of the wind conveying equipment, air outlet and air outlet pipeline of the wind conveying equipment, and aeration equipment 306. The aeration equipment 306 is used to increase the contact area between ozone and treated water and improve the dissolution rate of ozone. One third of the electrodeless lamp 304 is immersed in water, and the rest is above the water surface.

[0036] The oxidation and disinfecting pool 3 uses the micro-bubble technology of the aeration equipment 306 to increase the contact area between air and aquaculture tail water, which can not only increase the oxygen content in the water and improve the water environment, but also make ozone fully mixed with water, oxidize organic matter and ammonia nitrogen in the water, and kill pathogenic bacteria and microorganisms of fish, shrimps and crabs in the water. On the other hand, the surfactant or hydrophobic micro-suspended matter in the water is adsorbed on the bubbles and floats to the liquid surface. Organic matter in the water, such as protein, has an amphiphilic structure and is easily adsorbed on the bubbles, so it can be separated.

[0037] The clean water tank 4 is a facility for storing and accommodating the treated tail water. The clean water tank 4 is provided with a water quality sensor to monitor the treated water quality, and the clean water tank 4 is provided with a pipeline to connect to the aquaculture pond. The water quality sensor detects the effect of tail water treatment in real time, and adjusts the linkage equipment in the tail water treatment in time according to the monitoring results. The water quality monitoring data includes SS value, total nitrogen, Escherichia coli, Staphylococcus aureus, nitrite, etc., as well as Vibrio and other pathogens that affect aquaculture that farmers are concerned about.

[0038] In addition, various biological agents for improving water quality, oxygenation facilities and other agents and facilities for improving aquaculture conditions can be placed in this facility.

[0039] The tailwater treatment process of the above-mentioned fishery aquaculture tailwater treatment system comprises the following steps:

[0040] S1, the breeding pond is discharged to the sedimentation tank 1 through the pre-buried pipes and ditches. By reducing the flow rate of water, the residual bait and fish and shrimp feces in the breeding tail water are settled at the bottom of the pond. The sludge at the bottom of the sedimentation tank 1 is pumped out regularly by the sludge pump and can be used as fertilizer for the green belt of the breeding area after drying;

[0041] S2, other lighter substances flow with the water, through the overflow pipe into the filter tank 2, the filter tank 2 generally uses a slow filter, the filter material uses quartz sand and granular activated carbon, when the wastewater enters the filter layer, the larger suspended particles are intercepted, while the finer suspended particles are intercepted by adsorption and contact coagulation through contact with the filter particles or the attached suspended particles. Some loosely attached intercepted substances flow with the water to the next layer of filter material under the action of the water flow;

[0042] S3. The disinfection pool catalyzes and decomposes ammonia nitrogen, nitrite, pathogenic bacteria, etc. in the aquaculture tail water through the synergistic effect of microwaves, ultraviolet light and ozone. After the cracking, under the strong oxidative effect of ozone and hydroxyl and free radicals produced by photocatalysts, the ammonia nitrogen and nitrite in the aquaculture tail water are catalytically oxidized to generate colorless and odorless CO2, H2O and other harmless substances. The pathogenic bacteria in the aquaculture tail water are basically killed, and the residual ozone in the water continues to purify the water body;

[0043] S4. The catalytic, oxidized and decomposed water passes through pipes and ditches and enters the clean water pool 4. Various sensors are installed in the pool to monitor the water quality in real time. If the water quality meets the internal circulation standard of aquaculture, the water will be discharged into the clean water pipeline and returned to the aquaculture pool for use.

[0044] As above, although the utility model has been shown and described with reference to a specific preferred embodiment, it should not be interpreted as limiting the utility model itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the utility model defined in the attached claims.

Claims

1. A fishery tailwater treatment system, characterized in that: Including sequential connections: A sedimentation tank connected to the fishery breeding pond for settling leftover bait and fish and shrimp feces; A filter tank, wherein filter material is provided in the filter tank for absorbing suspended particles; The oxidation disinfecting pool is provided with a microwave generating chamber and an ultraviolet ozone generating chamber which can be connected. The microwave generating chamber is provided with a microwave generator, and the ultraviolet ozone generating chamber is provided with an ultraviolet ozone generator for decomposing ammonia nitrogen, nitrite, pathogenic bacteria, and the like. A clean water tank is provided with a water quality sensor for monitoring the quality of the treated water.

2. The fishery tailwater treatment system according to claim 1, characterized in that: The breeding pond is connected to the sedimentation tank through pre-buried pipes and ditches.

3. The fishery aquaculture tailwater treatment system according to claim 1, characterized in that: A sludge pump is provided at the bottom of the sedimentation tank.

4. The fishery aquaculture tailwater treatment system according to claim 1, characterized in that: The filter tank is a slow filter tank, and the filter material includes quartz sand in the upper layer and granular activated carbon in the lower layer.

5. The fishery tailwater treatment system according to claim 1, characterized in that: The microwave generator includes a magnetron.

6. The fishery aquaculture tailwater treatment system according to claim 1, characterized in that: The ultraviolet ozone generator comprises an electrodeless lamp, wherein a part of the electrodeless lamp is placed in the water and a part of the electrodeless lamp is exposed above the water surface.

7. The fishery aquaculture tailwater treatment system according to claim 1, characterized in that: The microwave generating chamber and the ultraviolet ozone generating chamber are separated by a partition plate, the partition plate is provided with a penetration hole, and a mica sheet and a Teflon layer are attached in the penetration hole.

8. The fishery tailwater treatment system according to claim 1, characterized in that: The ultraviolet ozone generating chamber is provided with a wind conveying device, an air supply pipeline leading to the oxidation and disinfection pool, and an aeration device. The wind conveying device passes ozone into the treated water through the air supply pipeline and the aeration device.

9. The fishery aquaculture tailwater treatment system according to claim 8, characterized in that: The wind transport equipment includes a high-pressure blower or an air compressor.

10. The fishery aquaculture tailwater treatment system according to claim 1, characterized in that: The clean water tank is provided with a pipeline connected back to the breeding pond.

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