CN205213874U - Highlands cold water fishes seed rearing system - Google Patents

Abstract

The utility model provides a system for cultivating cold-water fish fry in plateau areas, including a fish pond, a filter system, a sand filter tank, an ultraviolet sterilizing device, a fixed bed biological filter, a moving bed biological filter and a dissolved oxygen device; the fish pond An aeration and oxygenation device is installed inside, and the water outlet and water inlet of the fish pond are connected through an external pipeline. The connecting pipeline from the water outlet to the water inlet is sequentially equipped with a filtration system, a sand filter tank, an ultraviolet sterilizing device, a fixed bed biological filter, Moving bed biofilter and dissolved oxygen device. The system achieves sufficient dissolved oxygen concentration and maintains a stable water temperature for seed cultivation under natural conditions such as low saturated dissolved oxygen concentration in plateau areas and large temperature difference between day and night.

Description

Cultivation system of cold-water fish fry in plateau area

technical field

The utility model relates to the aquaculture industry, in particular to a system for cultivating cold-water fish fry in plateau areas.

Background technique

my country's plateau areas such as Tibet have abundant natural water resources, but there are plateau environmental characteristics such as fragile ecological environment, poor water self-purification ability, low primary productivity of breeding, and high altitude and low dissolved oxygen. Due to the limitation of geographical location and climatic conditions, the technology research and equipment popularization and application of industrial circulating water seedling cultivation in plateau areas of our country lag behind obviously. The main source of aquaculture seed in plateau areas is usually obtained by long-distance live fish transportation. Due to the influence of weather and long-distance transportation, the seed loss is serious and the freight is expensive, resulting in high seed price. Scarce seed sources and high seed prices have seriously restricted the rapid development of aquaculture in plateau areas. The local demand for healthy, high-quality, high-value-added and characteristic indigenous fish fry is becoming increasingly urgent.

Traditional open water seedling cultivation technology and equipment are highly dependent on natural water sources and climatic conditions, and cannot meet the breeding requirements of plateau areas under natural conditions such as thin air, strong light, low saturated dissolved oxygen concentration (low air pressure) and large temperature difference between day and night. . Therefore, the popularization and application of circulating water seed cultivation system technology in Tibet and other plateau areas is increasingly on the agenda. The application of ecological engineering technology in modern aquaculture to coordinate the overall development of fishery is an economical and efficient modern fishery production model. With the basic characteristics of resource conservation, environmental friendliness, safety and high efficiency, it is the goal of the transformation of fishery production mode. The development of a cold-water fish seed breeding system in plateau areas is of great significance to Tibet and other plateau areas where the aquaculture industry is underdeveloped.

201310724696.8, a utility model patent application titled "A Seawater Circulating Aquaculture System", including fish ponds, dissolved oxygen tanks, aeration and aeration machines, the first microbial purification tank, the second microbial purification tank, and rapid filtration device, fully automatic microfiltration machine, protein skimmer, temperature adjustment pool, ultraviolet sterilizer, water quality monitoring system and circulation pump, the water quality monitoring system includes single-chip microcomputer and sensor, this industrialized seawater fish farming system can greatly reduce the cost of seawater factory The input cost of chemical recirculating aquaculture and the energy consumption in the breeding process.

CN201220213124.4, a utility model patent titled "High-efficiency, energy-saving and environment-friendly recirculating aquaculture system", said recirculating aquaculture system includes: aquaculture pond; water inlet pipe and return pipe; oxygen supplement system; water treatment system; ultraviolet sterilizer; One side of the ultraviolet sterilizer is connected to the return pipe, and the other side of the ultraviolet sterilizer is connected to the water outlet of the water treatment system; the water treatment system is connected in sequence according to the direction of water flow: drum microfilter, sump, sedimentation tank, oxygenation filter The pool and two moving bed biofilm reaction tanks; the sedimentation tank, the aeration filter tank and the two moving bed biofilm reaction tanks are connected to each other through the overflow port on the upper part.

The above patents are aimed at adult fish farming in marine fish farming conditions, and are not suitable for cold-water fish fry cultivation in plateau areas, and cannot overcome natural conditions such as low saturated dissolved oxygen concentration (low air pressure) and large temperature difference between day and night in plateau areas features.

Utility model content

In order to solve the lack of technology and equipment of the cold-water fish seed cultivation system currently applicable to the plateau area, the utility model provides a cold-water fish seed cultivation system in the plateau area, and the saturated dissolved oxygen concentration in the plateau area is low ( Low air pressure) and large temperature difference between day and night to achieve sufficient dissolved oxygen concentration and maintain a stable water temperature for seed cultivation.

In order to realize the above-mentioned purpose of the invention, the utility model adopts the following technical scheme:

The cold-water fish seed cultivation system in the plateau area is characterized in that it includes a fish pond, a filter system, a sand filter tank, an ultraviolet sterilizing device, a fixed bed biofilter, a moving bed biofilter and a dissolved oxygen device; the fish pond is provided with Aeration and oxygenation device, the water outlet and water inlet of the fish pond are connected through external pipelines, and the connecting pipeline from the water outlet to the water inlet is successively equipped with a filtration system, a sand filter tank, an ultraviolet sterilizing device, a fixed bed biological filter, and a moving bed biological filter. filter and dissolved oxygen device.

The utility model connects the moving bed biological filter behind the fixed bed biological filter, because the fixed bed biological filter and the moving bed biological filter have different emphases on functional points. The fixed bed biological filter can further intercept and precipitate particulate matter while removing ammonia nitrogen and nitrite nitrogen by biological filtration. The function of the moving bed biological filter is the removal of ammonia nitrogen and nitrous nitrogen, as well as the automatic cleaning of the biological filter material, so as to improve the efficiency of biological purification.

The utility model uses a sand filter tank to further decontaminate after the microfilter removes the suspended particles, because the seedlings whose body length is smaller than the adult fish, the particles (fish excrement, residual bait, etc.) Finely crushed, in any case, it is impossible to completely remove the particulate matter after filtering through the microfilter. Compared with adult fish farming, seedlings usually have higher requirements on the clarity of the water body, so it is necessary to continue to set up after the microfilter The sand filter can further filter out particulate matter, and even set up a fixed-bed biological filter to further intercept and precipitate residual particulate matter.

The oxygen dissolving device described in the utility model is a trickle-type low-pressure pure oxygen dissolving device. In order to overcome the characteristics of natural conditions such as low saturated dissolved oxygen concentration (low air pressure) and large temperature difference between day and night in the plateau area, a trickle-type pure oxygen dissolved oxygen device is used. The high oxygen dissolution efficiency of the device improves the oxygen dissolution capacity of the system and maintains the dissolved oxygen demand of the breeding objects. See patent ZL200910195316.X for the specific structure of the trickle-type pure oxygen dissolving device. This device is a low-pressure pure oxygen dissolving device, suitable for use in plateau areas.

The utility model arranges an aeration and oxygenation device in the fish pond to delay the occurrence of dead fish caused by the rapid consumption of dissolved oxygen after the water circulation stops due to system failure.

The filter system described in the utility model is a water tank provided with a microfilter, and a heat exchange coil is installed in the water tank. While removing suspended particles in the water body, it can automatically adjust the water temperature to overcome the impact of the large temperature difference between day and night in plateau areas on fish fry. At the same time, the heat exchange coil used for temperature control is installed in the tank of the microfilter, which is beneficial to save space, and there is no need to set up a temperature adjustment pool separately.

Preferably, the microfilter is a rotary drum microfilter with a filter mesh of 200 mesh, which can effectively remove suspended particles in the water body.

Preferably, water is supplied to the water tank of the microfilter, so that the newly supplemented water passes through the subsequent water treatment process to assimilate the water quality and reduce the impact on the breeding objects caused by the difference in the quality of the newly supplemented water.

Both the fishpond and the filter system of the utility model are provided with sewage outlets, which regularly discharge sewage or replace 10%-15% of the water body. To make up for the water lost by blowdown, it is necessary to make up for the water lost by evaporation, etc.

The utility model only arranges the water pump before the sand filter tank. Considering the water level balance of each link of the system, the water pump is only configured once in the entire water circulation system, which also takes into account the requirement that the water entering the sand filter must be pressure water.

The water circulation rate of the fish fry cultivation system of the utility model is once per hour, and the circulation rate can be adjusted by adjusting the power frequency of the water pump or the diversion water volume of the water outlet of the water pump according to the needs of different fish fry cultivation and breeding.

The water circulation rate is calculated based on the technical needs of biological filtration, suspended particle removal, aeration, etc., and the water flow rate required for fish pond sewage discharge.

The pool depth of fish pond described in the utility model is 0.8-1.0 meter, and water depth is 0.7-0.9 meter.

Preferably, the fish pond is circular with a diameter of 1.5-2m. Such a ratio of depth to diameter is conducive to the formation of secondary water flow in the fish pond and the realization of good sewage discharge effect.

Preferably, the fish pond is welded from polypropylene plates. It is relatively light, anti-fall, convenient for long-distance transportation and on-site welding and assembly, low cost, and dirt is not easy to adhere to the inner wall of the fish pond.

The moving bed biological filter described in the utility model includes a tank body, an aeration cylinder, a water inlet ring, an air intake ring, an air inlet pipe, and a sewage collection chamber; the aeration device is arranged in the middle of the tank body, and the collection chamber The dirty cavity is arranged in the lower part of the tank body, the water inlet ring is an annular pipe arranged along the upper inner wall of the tank body, there is a circle of water outlet holes at the bottom of the water inlet ring, and the water inlet of the water inlet ring communicates with the water inlet of the tank body; The aeration cylinder is a cylinder with upper and lower openings, the air intake ring is an annular pipe arranged along the outer wall below the aeration cylinder, and there are aeration holes on the contact surface between the air intake ring and the aeration cylinder; The air ring is connected with the air inlet on the tank body through the air inlet pipe; the water outlet of the tank body is arranged above the water inlet.

The moving bed biological filter is filled with suspended biological filter material and water. The water to be treated enters the water inlet ring from the water inlet, and enters the filter through the water outlet hole at the bottom of the water inlet ring, driving the water in the external tank of the aerator from top to bottom. Downward movement; air passes through the intake pipe, enters the intake ring, enters the water body in the aerator through the aeration hole on the aerator, and the tiny air bubbles move upward along the inner wall of the aerator, driving the water and water in the aerator The suspended biological filter material moves synchronously from bottom to top. In this way, the suspended biological filter material in the filter flows out of the aeration tank from bottom to top along with the water body, and enters the aeration tank from top to bottom outside, forming an up and down circular movement in the tank. Through the movement and mutual collision and friction of granular filter materials in the water body, the aging biofilm will be shed, the efficiency of biological purification will be improved, and the removal of ammonia nitrogen and nitrous nitrogen will be realized. At the same time, the automatic cleaning of biological filter materials will be realized.

Because the water temperature required by cold-water fish is lower than that of conventional common farming objects, the treatment efficiency of the conventional biological filter (pool) equipped with the system is low, and the time required for the initial start-up of the biological filter to stable operation is greatly increased. The particle-type biological filter material of the biological filter of the utility model moves in the water body and collides with each other and rubs against each other, and the aging biofilm falls off, which improves the biological purification efficiency, and makes the biological filter material filled inside adhere to the biofilm and the biofilm matures. The time is shorter, the biofilm maturation time of the usual biofilter is about 45-60 days, and the biofilm maturation time under the condition of low temperature fresh water is about 25-30 days, which is a quick-start biofilter.

Preferably, the specific surface area of the biological filler filled in the moving bed biofilter is 500-600m ² /m ³ , which is a quick-start biofilter, and the specific surface area of the biological filler filled in the moving bed biofilter is relatively large, so that the biofilter with the same volume is larger than other biological filters. The filter processing load is higher.

Preferably, a water outlet baffle is provided below the water outlet, and a hole with a diameter of less than 5 mm is opened on the water outlet baffle. The water treated by the filter flows out from the water outlet through the densely distributed small holes on the water outlet baffle, which effectively prevents the filter material from escaping from the filter and entering the equipment equipped in the latter link, resulting in damage to related equipment.

Further preferably, the included angle between the water outlet baffle and the inner wall of the tank is 120°. Avoid the accumulation of filter material at the angle, and at the same time make the water flow more smoothly, which is conducive to the up and down circulation of the water body and filter material inside the filter.

Preferably, the diameter of the outlet hole of the water inlet ring is less than 5mm. It can effectively prevent the water in the filter from being sucked back due to the failure of external supporting equipment, and prevent the filter material from entering the equipment equipped in the previous link of the filter and causing damage to related equipment.

Preferably, the pore size of the aeration hole is 1-2 mm, which can effectively drive the water body and the filter material to circulate up and down inside the filter.

Preferably, the angle between the side wall of the dirt collecting chamber and the inner wall of the tank is 120°. The suspended particles in the filter can quickly enter the sewage collection chamber, and the sewage can be quickly discharged through manual sewage or regular automatic sewage discharge to reduce the load on the filter. At the same time, the water flow is smoother, which is conducive to the up and down circulation of the water body and the filter material inside the filter.

Preferably, a sewage baffle with an opening diameter of less than 5mm is arranged in the sewage collection chamber. It can effectively prevent the filter material from escaping the filter.

Preferably, the tank body is 2.3-2.6m high and 1.2-1.6m in diameter, the aeration cylinder is 0.8-1.4m high and 0.4-0.5m in diameter, and the aeration cylinder is located in the center of the tank body. Such a size relationship is conducive to the formation of a good water flow state inside the filter, so that the filter material can circulate up and down with the water body; it is beneficial to the self-cleaning of the filter material and the concentration and discharge of suspended particles; it is conducive to the full contact between the filter material and the water body, thereby Improve the treatment efficiency of moving bed biofilter.

Preferably, the volume ratio of the intake air volume of the moving bed biological filter to the water treatment volume is 1:1, which provides enough oxygen for the biological filter material treatment, and at the same time promotes the smooth flow of the water body in the filter to ensure the residence time of the water in the filter For 40-20 minutes to get fully purified.

The beneficial effects of the utility model are:

1. It has been proved by many tests that the seedling survival rate of the fish seed cultivation system of the present utility model is more than 90% when it is used for the seedling cultivation of rainbow trout and Yadong salmon, and successfully raised rainbow trout and Yadong salmon from The larvae and juveniles that open their mouths to eat are cultivated to an average size of 25g/tail. The test confirmed that the feeding and growth of seedlings is normal; the water quality is good, the main water quality indicators are dissolved oxygen ≥ 7mg/L, pH value maintained at 6.5-7.5, and non-ionic ammonia ≤ 0.015mg/L. No disease occurs during seed cultivation, and the system works well.

2. After the microfilter removes the suspended particles, the system uses a sand filter tank for further decontamination. The reason is that the particles (fish feces, residual bait, etc.) It is relatively fine, and it is impossible to completely remove the particulate matter after filtering through the microfilter under any circumstances. Compared with adult fish farming, seedlings usually have higher requirements for the clarity of the water body, so it is necessary to continue after the microfilter. Set up a sand filter tank to further filter out particulate matter, and even set up a fixed-bed biological filter to further intercept and precipitate residual particulate matter. It can effectively remove suspended particles with a particle size greater than 50 μm, and the single removal rate is over 80%, which is far better than the effect of one-time decontamination. The particle size of suspended particles usually removed by one-time decontamination is greater than 100 μm, and the single removal rate is lower Low.

3. The filtration system of the present invention is a water tank provided with a microfilter, and a heat exchange coil is installed in the water tank. While removing suspended particles in the water body, it can automatically adjust the water temperature to overcome the impact of the large temperature difference between day and night in plateau areas on fish fry. At the same time, the heat exchange coil used for temperature control is installed in the tank of the microfilter, which is beneficial to save space, and there is no need to set up a temperature adjustment pool separately.

4. The utility model arranges an aeration device in the moving bed biological filter, so that the suspended biological filter material in the filter flows out of the aeration tank from the bottom to the top along with the water body, and enters the aeration tank from the top to the bottom on the outside. An up and down cycle movement is formed in the tank. The granular biological filter material in the filter moves and collides with each other in the water body, shedding the aging biofilm, improving the efficiency of biological purification, realizing the removal of ammonia nitrogen and nitrous nitrogen, and realizing the automatic cleaning of the biological filter material.

5. The moving bed biological filter of the utility model has an annular water inlet ring arranged along the upper inner wall of the tank body. Such an inlet water distribution structure is conducive to the uniform distribution of the water to be treated entering the filter inside the filter, and can also utilize the inlet The water further pushes the water body and the filter material in the filter to move up and down.

6. The seed breeding system of the present utility model is especially suitable for the cultivation of cold-water fish seedlings in plateau areas. Since the water temperature required by cold-water fish is lower than that of conventional common breeding objects, the conventional biological filter (pool) equipped with the system will Efficiency is low, and the time required for biofilter initial start-up to stable operation is greatly increased. The particle-type biological filter material of the mobile biological filter of the utility model moves in the water body and collides with each other, and the aging biofilm falls off, which improves the biological purification efficiency, and makes the biological filter material filled inside adhere to the biofilm and the biofilm matures. The time for biofilm maturation is shorter, the biofilm maturation time of the usual biofilter is about 45-60 days, and the biofilm maturation time under low temperature fresh water conditions is about 25-30 days. The specific surface area of the filler is larger, so that the biofilter with the same volume has a higher treatment load than other biofilters.

Description of drawings

Fig. 1 is the structure schematic diagram of the cold-water fish fry breeding system in plateau area of the present invention.

Fig. 2 is a sectional view of the moving bed biological filter of the present invention.

Fig. 3 is a top view of the mobile biological filter of the present invention.

The marks in the figure are: 1. Fish pond, 2. Microfilter, 3. Water pump, 4. Sand filter tank, 5. Ultraviolet sterilizing device, 6. Fixed bed biological filter, 7. Moving bed biological filter, 8. Dissolved oxygen device , 9, aeration and oxygenation device, 10, heat exchange coil, 11, sewage outlet, 12, water inlet, 13, water outlet, 14, air inlet, 15, sewage outlet, 16, tank body, 17, filter Material inlet, 18, water outlet baffle, 19, water inlet ring, 20, aerator, 21, intake ring, 22, air intake pipe, 23, support rod, 24, sewage baffle, 25, sewage collection chamber, 26 , sewage pipe, 27, support seat, 28, aeration hole.

detailed description

The substantive content of the present utility model will be further described in detail below in conjunction with specific embodiments.

Example 1

The cold-water fish fry breeding system in the plateau area includes a fish pond 1, a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed bed biofilter 6, a moving bed biofilter 7 and a dissolved oxygen device 8; the fish pond 1 An aeration and oxygenation device 9 is arranged inside, and the water outlet and the water inlet of the fish pond 1 are connected through an external pipeline, and the connecting pipeline from the water outlet to the water inlet is successively provided with a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed Bed biofilter 6, moving bed biofilter 7 and dissolved oxygen device 8.

Example 2

The cold-water fish fry breeding system in the plateau area includes a fish pond 1, a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed bed biofilter 6, a moving bed biofilter 7 and a dissolved oxygen device 8; the fish pond 1 An aeration and oxygenation device 9 is arranged inside, and the water outlet and the water inlet of the fish pond 1 are connected through an external pipeline, and the connecting pipeline from the water outlet to the water inlet is successively provided with a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed Bed biofilter 6, moving bed biofilter 7 and dissolved oxygen device 8.

The oxygen dissolving device 8 is a trickle-flow low-pressure pure oxygen dissolving device, and the specific structure is shown in patent ZL200910195316.X.

Example 3

The cold-water fish fry breeding system in the plateau area includes a fish pond 1, a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed bed biofilter 6, a moving bed biofilter 7 and a dissolved oxygen device 8; the fish pond 1 An aeration and oxygenation device 9 is arranged inside, and the water outlet and the water inlet of the fish pond 1 are connected through an external pipeline, and the connecting pipeline from the water outlet to the water inlet is successively provided with a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed Bed biofilter 6, moving bed biofilter 7 and dissolved oxygen device 8.

The oxygen dissolving device 8 is a trickle-flow low-pressure pure oxygen dissolving device, and the specific structure is shown in patent ZL200910195316.X.

The filtration system is a water tank provided with a microfilter 2, and a heat exchange coil 10 is installed in the water tank.

Example 4

The cold-water fish fry breeding system in the plateau area includes a fish pond 1, a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed bed biofilter 6, a moving bed biofilter 7 and a dissolved oxygen device 8; the fish pond 1 An aeration and oxygenation device 9 is arranged inside, and the water outlet and the water inlet of the fish pond 1 are connected through an external pipeline, and the connecting pipeline from the water outlet to the water inlet is successively provided with a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed Bed biofilter 6, moving bed biofilter 7 and dissolved oxygen device 8.

The oxygen dissolving device 8 is a trickle-flow low-pressure pure oxygen dissolving device, and the specific structure is shown in patent ZL200910195316.X.

The filtration system is a water tank provided with a rotary drum microfilter 2, a heat exchange coil 10 is installed in the water tank, and the filter mesh of the rotary drum microfilter is 200 mesh.

Example 5

The cold-water fish fry breeding system in the plateau area includes a fish pond 1, a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed bed biofilter 6, a moving bed biofilter 7 and a dissolved oxygen device 8; the fish pond 1 An aeration and oxygenation device 9 is arranged inside, and the water outlet and the water inlet of the fish pond 1 are connected through an external pipeline, and the connecting pipeline from the water outlet to the water inlet is successively provided with a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed Bed biofilter 6, moving bed biofilter 7 and dissolved oxygen device 8.

The oxygen dissolving device 8 is a trickle-type low-pressure pure oxygen dissolving device.

The filtration system is a water tank provided with a rotary drum microfilter 2, a heat exchange coil 10 is installed in the water tank, and the filter mesh of the rotary drum microfilter is 200 mesh.

Add water to the water tank of the microfiltration machine, so that the newly replenished water passes through the subsequent water treatment process, assimilates the water quality, and reduces the impact on the breeding objects caused by the difference in the newly replenished water quality.

The pond depth of described fish pond 1 is 0.8 meter, and water depth is 0.7 meter.

Described fish pond 1 is circular, and diameter is 1.5m.

Example 6

The cold-water fish fry breeding system in the plateau area includes a fish pond 1, a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed bed biofilter 6, a moving bed biofilter 7 and a dissolved oxygen device 8; the fish pond 1 An aeration and oxygenation device 9 is arranged inside, and the water outlet and the water inlet of the fish pond 1 are connected through an external pipeline, and the connecting pipeline from the water outlet to the water inlet is successively provided with a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed Bed biofilter 6, moving bed biofilter 7 and dissolved oxygen device 8.

The oxygen dissolving device 8 is a trickle-type low-pressure pure oxygen dissolving device.

The filtration system is a water tank provided with a rotary drum microfilter 2, a heat exchange coil 10 is installed in the water tank, and the filter mesh of the rotary drum microfilter is 200 mesh.

Add water to the water tank of the microfiltration machine, so that the newly replenished water passes through the subsequent water treatment process, assimilates the water quality, and reduces the impact on the breeding objects caused by the difference in the newly replenished water quality.

Both the fish pond 1 and the filter system are provided with sewage outlets, and regularly discharge sewage or replace 10%-15% of the water body.

The pond depth of described fish pond 1 is 1.0 meters, and water depth is 0.9 meters.

Described fish pond 1 is circular, and diameter is 2m.

Example 7

The cold-water fish fry breeding system in the plateau area includes a fish pond 1, a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed bed biofilter 6, a moving bed biofilter 7 and a dissolved oxygen device 8; the fish pond 1 An aeration and oxygenation device 9 is arranged inside, and the water outlet and the water inlet of the fish pond 1 are connected through an external pipeline, and the connecting pipeline from the water outlet to the water inlet is successively provided with a filtration system, a sand filter tank 4, an ultraviolet sterilizing device 5, a fixed Bed biofilter 6, moving bed biofilter 7 and dissolved oxygen device 8.

The oxygen dissolving device 8 is a trickle-type low-pressure pure oxygen dissolving device.

The filtration system is a water tank provided with a rotary drum microfilter 2, a heat exchange coil 10 is installed in the water tank, and the filter mesh of the rotary drum microfilter is 200 mesh.

Add water to the water tank of the microfiltration machine, so that the newly replenished water passes through the subsequent water treatment process, assimilates the water quality, and reduces the impact on the breeding objects caused by the difference in the newly replenished water quality.

Both the fish pond 1 and the filter system are provided with sewage outlets, and regularly discharge sewage or replace 10%-15% of the water body.

This system is only provided with a water pump before the sand filter tank 4 .

The pond depth of described fish pond 1 is 0.9 meter, and water depth is 0.8 meter.

Described fish pond 1 is circular, and diameter is 1.8m.

Example 8

This embodiment is on the basis of embodiment 1:

The moving bed biological filter device includes a tank body 16, an aerator 20, a water inlet ring 19, an air inlet ring 21, an air inlet pipe 22, and a sewage collection chamber 25; the aerator 20 is arranged on the tank body 16 In the middle part, the sewage collection chamber 25 is arranged at the bottom of the tank body 16, and the water inlet ring 19 is an annular pipe arranged along the inner wall above the tank body 16, and there is a circle of water outlet holes at the bottom of the water inlet ring 19. The water inlet of the water inlet ring 19 communicates with the water inlet 12 of the tank; the aerator 20 is a cylinder with upper and lower openings, and the inlet ring 21 is an annular pipe arranged along the outer wall below the aerator 20, and the air inlet There are aeration holes 28 on the contact surface between the ring 21 and the aerator 20; the air inlet ring 21 is connected to the air inlet 14 on the tank body 16 through the air inlet pipe 22; the water outlet 13 of the tank body 16 Set above the water inlet 12.

Example 9

This embodiment is on the basis of embodiment 1:

The moving bed biological filter device includes a tank body 16, an aerator 20, a water inlet ring 19, an air inlet ring 21, an air inlet pipe 22, and a sewage collection chamber 25; the aerator 20 is arranged on the tank body 16 In the middle part, the sewage collection chamber 25 is arranged at the bottom of the tank body 16, and the water inlet ring 19 is an annular pipe arranged along the inner wall above the tank body 16, and there is a circle of water outlet holes at the bottom of the water inlet ring 19. The water inlet of the water inlet ring 19 communicates with the water inlet 12 of the tank; the aerator 20 is a cylinder with upper and lower openings, and the inlet ring 21 is an annular pipe arranged along the outer wall below the aerator 20, and the air inlet There are aeration holes 28 on the contact surface between the ring 21 and the aerator 20; the air inlet ring 21 is connected to the air inlet 14 on the tank body 16 through the air inlet pipe 22; the water outlet 13 of the tank body 16 Set above the water inlet 12.

A water outlet baffle 18 is arranged below the water outlet 13, and a hole with a diameter of 3 mm is opened on the water outlet baffle 18.

The aperture of the water outlet hole of the water inlet ring 19 is 2mm.

Example 10

This embodiment is on the basis of embodiment 7:

The moving bed biological filter device includes a tank body 16, an aerator 20, a water inlet ring 19, an air inlet ring 21, an air inlet pipe 22, and a sewage collection chamber 25; the aerator 20 is arranged on the tank body 16 In the middle part, the sewage collection chamber 25 is arranged at the bottom of the tank body 16, and the water inlet ring 19 is an annular pipe arranged along the inner wall above the tank body 16, and there is a circle of water outlet holes at the bottom of the water inlet ring 19. The water inlet of the water inlet ring 19 communicates with the water inlet 12 of the tank; the aerator 20 is a cylinder with upper and lower openings, and the inlet ring 21 is an annular pipe arranged along the outer wall below the aerator 20, and the air inlet There are aeration holes 28 on the contact surface between the ring 21 and the aerator 20; the air inlet ring 21 is connected to the air inlet 14 on the tank body 16 through the air inlet pipe 22; the water outlet 13 of the tank body 16 Set above the water inlet 12.

The aperture of the water outlet hole of the water inlet ring 19 is 3mm.

Example 11

This embodiment is on the basis of embodiment 7:

The moving bed biological filter device includes a tank body 16, an aerator 20, a water inlet ring 19, an air inlet ring 21, an air inlet pipe 22, and a sewage collection chamber 25; the aerator 20 is arranged on the tank body 16 In the middle part, the sewage collection chamber 25 is arranged at the bottom of the tank body 16, and the water inlet ring 19 is an annular pipe arranged along the inner wall above the tank body 16, and there is a circle of water outlet holes at the bottom of the water inlet ring 19. The water inlet of the water inlet ring 19 communicates with the water inlet 12 of the tank; the aerator 20 is a cylinder with upper and lower openings, and the inlet ring 21 is an annular pipe arranged along the outer wall below the aerator 20, and the air inlet There are aeration holes 28 on the contact surface between the ring 21 and the aerator 20; the air inlet ring 21 is connected to the air inlet 14 on the tank body 16 through the air inlet pipe 22; the water outlet 13 of the tank body 16 Set above the water inlet 12.

A water outlet baffle 18 is arranged below the water outlet 13, and a hole with a diameter of 1 mm is opened on the water outlet baffle.

The aperture of the aeration hole 28 is 1mm.

Claims (10)

1. highlands cold water fishes seed rearing system, is characterized in that: comprise fishpond (1), filtration system, sandfiltration pot (4), ultraviolet sterilization apparatus (5), fixed bed biofilter (6), moving bed biological filter (7) and low pressure oxygen-dissolving apparatus (8); Aeration oxygen replenishing device (9) is provided with in described fishpond (1), the delivery port in fishpond (1) is communicated with by external pipe with water inlet, the connecting pipe from delivery port to water inlet is disposed with filtration system, sandfiltration pot (4), ultraviolet sterilization apparatus (5), fixed bed biofilter (6), moving bed biological filter (7) and low pressure oxygen-dissolving apparatus (8).

2. highlands according to claim 1 cold water fishes seed rearing system, is characterized in that: described low pressure oxygen-dissolving apparatus (8) is dribble-feed low pressure pure oxygen oxygen-dissolving apparatus.

3. highlands according to claim 1 cold water fishes seed rearing system, is characterized in that: described filtration system, for being provided with the tank of Microfilter (2), is provided with heat exchange coil (10) in tank.

4. highlands according to claim 3 cold water fishes seed rearing system, is characterized in that: described Microfilter (2) is rotary drum Microfilter, and filtering mesh is 200 orders.

5. highlands according to claim 1 cold water fishes seed rearing system, is characterized in that: fishpond (1) and filtration system are provided with sewage draining exit.

6. highlands according to claim 1 cold water fishes seed rearing system, is characterized in that: only arrange water pump (3) sandfiltration pot (4) is front.

7. highlands according to claim 1 cold water fishes seed rearing system, is characterized in that: the pond of described fishpond (1) is 0.8-1.0 rice deeply, and the depth of water is 0.7-0.9 rice.

8. highlands according to claim 1 cold water fishes seed rearing system, is characterized in that: described fishpond (1) is for circular, and diameter is 1.5-2m.

9. highlands according to claim 1 cold water fishes seed rearing system, is characterized in that: described moving bed biological filter comprises tank body (16), aeration cylinder (20), water inlet ring (19), air inlet ring (21), air inlet pipe (22), collects dirty chamber (25); Described aeration cylinder (20) is arranged on the middle part in tank body (16), the dirty chamber (25) of described collection is arranged on the bottom in tank body (16), described water inlet ring (19) is the looped pipeline arranged along tank body (16) upper inner wall, water hole is irised out in water inlet ring (19) bottom, and the water inlet of water inlet ring (19) communicates with the water inlet (12) of tank body; The cylindrical shell that described aeration cylinder (20) is upper and lower opening, air inlet ring (21) is the looped pipeline arranged along aeration cylinder (20) external wall beneath, and air inlet ring (21) and the contact surface of aeration cylinder (20) have solarization air cap (28); Described air inlet ring (21) is connected with the air inlet (14) on tank body (16) by air inlet pipe (22); The delivery port (13) of described tank body (16) is arranged on the top of water inlet (12).

10. highlands according to claim 9 cold water fishes seed rearing system, is characterized in that: the aperture of described solarization air cap (28) is 1-2mm.