Pneumatic type in-situ circulating ecological filtering system and application thereof

Abstract

The invention provides a pneumatic in-situ circulating ecological filtering system and application thereof, the pneumatic in-situ circulating ecological filtering system comprises a water lifting pipe, a water storage square barrel and an algae attachment square disc, the upper end of the water lifting pipe is connected with a valve for discharging water, the lower end is connected with a pneumatic generator, and the water lifting pipe is fixedly connected with a water guide pipe through a fixer; the fixing device penetrates through the wall of the square water storage barrel, the water guide pipe is located in the square water storage barrel, the upper end of the water guide pipe is connected with a variable-diameter connector, and the diameter of the variable-diameter connector is gradually increased in the upper end opening direction. A microbial filter material is arranged in the water storage square barrel, a blocking filter screen is mounted above the filter material, a water guide opening is formed in one side of the barrel and located above the blocking filter screen, and the water guide opening is fixedly connected with the algae attachment square plate to guide water flow into the square plate; a micropore cross plate is laid on the surface of the square plate, a full-spectrum lamp is arranged above the square plate, and a drainage pipe is connected to one side. The device can improve dissolved oxygen in water and stabilize water quality, so that the aquaculture density, survival rate and yield are improved, and the whole device has the advantages of being high in filtering efficiency, good in aquaculture effect, low in energy consumption, low in operation cost and the like.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture, and in particular to a pneumatic in-situ circulating ecological filtering system and application thereof. Background Art

[0002] As the world's largest consumer of aquatic products, my country is facing the growing consumption and food safety needs of domestic consumers. Large-scale aquaculture has replaced fishing as a general trend. Compared with extensive flow-through aquaculture and high-energy consumption factory-scale recirculating aquaculture, ecological aquaculture has the advantages of less environmental pollution and high unit output. It also has the advantages of low cost and simple process flow. Its outstanding features such as efficient water treatment capacity, no secondary pollution to the aquaculture water environment, and recyclable or harmless discharge of aquaculture tail water have been widely recognized by the aquatic industry.

[0003] Although ecological aquaculture has the above common advantages, there are great differences between different methods. Some methods still have great shortcomings. For example, the traditional biofilm aquaculture method has complicated processes and high material consumption. The ecological pond aquaculture method has problems such as additional land resources, huge pressure for centralized wastewater treatment at the end of aquaculture, and inability to meet the demand for immediate circulating water. It is still unable to cope with high-density intensive aquaculture production. Patent 201110321423.X discloses a water purification aquaculture system using an aeration component, but its filtration method is still microbial filtration, which cannot fully absorb and remove soluble nutrients, and the water flow cannot be isolated from the in-situ aquaculture water during the filtration process, so the filtration efficiency is relatively low. This requires scientists to continuously research and develop new efficient, safe and economical ecological circulation filtration systems. Summary of the invention

[0004] In view of the high cost and other problems of the current mainstream traditional biofilm aquaculture method and ecological pond aquaculture method in ecological aquaculture, as well as the insufficient efficiency of aeration-driven circulating filtration and water purification, in order to solve the above problems existing in the prior art, the present invention provides a pneumatic in-situ circulating ecological filtration system and its application. The system has the characteristics of high filtration efficiency, low cost, low energy consumption and good aquaculture effect, and can improve the density, survival rate and yield of aquaculture.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A pneumatic in-situ circulating ecological filtration system comprises a water lifting pipe, a water storage barrel and an algae attachment square plate, wherein the upper end of the water lifting pipe is connected to a valve for discharging water, the lower end of the water lifting pipe is connected to a pneumatic generator, the water lifting pipe is fixedly connected to a water guide pipe through a fixture, the fixture passes through the barrel wall of the water storage barrel, the water guide pipe is located in the water storage barrel, and the upper end of the water guide pipe is located below the valve, the upper end of the water guide pipe is connected to a reducing interface, the diameter of the reducing interface gradually increases along the upper end opening direction, the lower end of the water guide pipe extends to the bottom of the water storage barrel, a microbial filter material is arranged in the water storage barrel, a blocking filter screen is installed above the microbial filter material, a water guide opening is arranged on one side of the water storage barrel above the blocking filter screen, and the water guide opening is fixedly connected to the algae attachment square plate to guide water flow into the algae attachment square plate, a microporous cross plate is laid on the surface of the algae attachment square plate, a full-spectrum lamp is arranged above the algae attachment square plate, and a drain pipe is connected to one side of the algae attachment square plate.

[0007] Furthermore, a porous aeration disk is arranged inside the pneumatic generator, and the porous aeration disk is connected to an external aeration pipe.

[0008] Furthermore, the fixer is an annular clamp that fixes the water lifting pipe and the water guiding pipe.

[0009] Furthermore, the cross-sectional width of the water storage square barrel is less than or equal to the width of the algae attachment square plate, the algae attachment square plate is tilted, the water inlet end is higher than the water outlet end, and the height of the water outlet end is slightly higher than the height of the aquaculture water, that is, the height of the water guide opening of the water storage square barrel is higher than the algae attachment square plate, guiding the water flow into the algae attachment square plate, and the highest point of the water storage square barrel is higher than the height of the aquaculture water.

[0010] Furthermore, the height of the blocking filter is lower than the water guide opening, the cross-section of the blocking filter is the same as the cross-section of the water storage barrel, and the pore size of the blocking filter is smaller than the diameter of the microbial filter material, thereby intercepting large pieces of solid waste and preventing the microbial filter material from floating up and overflowing.

[0011] Furthermore, the microbial filter material is a high-temperature sintered stone or a plastic sponge fluidized bed filler, and the filling height of the microbial filter material is the same as the water depth.

[0012] Furthermore, the drainage pipe is of a U-shaped structure, and a hole is opened in the wall of the horizontal pipe at the bottom of the drainage pipe to guide the circulating water to flow back.

[0013] The present invention also provides application of the pneumatic in-situ circulating ecological filtration system in aquaculture. Preferably, the pneumatic in-situ circulating ecological filtration system is applied to a breeding pond. More preferably, the breeding pond is an indoor breeding pond.

[0014] Furthermore, the aquaculture water in the aquaculture pond is prepared as follows: a probiotic bacterial powder is used to prepare a bacterial solution with a final concentration of 106-1011 cfu / mL, and a non-water bloom type is used to prepare a microalgae solution with a final concentration of 104-108 ind / mL. The aquaculture species is labeled with seedlings and placed in the aquaculture pond as the starting state of aquaculture, and 1-2 L of the above liquids are evenly applied for every 10 tons of aquaculture water volume.

[0015] Furthermore, the aquaculture pond is treated as follows: the algae attachments are scraped off once every 5-7 days, leaving about 1-5 mm thick algae attachments on the surface of the board, and 100-500 mL of the above liquid is added for every 10 tons of aquaculture water volume after scraping, so that the microbial probiotics and algae continue to occupy the main ecological niche during a breeding cycle, preventing the microecological succession in the aquaculture pond water from forming harmful algae and bacteria communities.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The present invention provides a pneumatic in-situ circulating ecological filtration system. In-situ circulating water makes aquaculture wastewater treatment instantaneous, greatly reducing the pressure of centralized wastewater treatment at the end of aquaculture, while saving land and space resources, and eliminating the need to build additional wastewater treatment sites and facilities.

[0018] 2. The present invention uses the method of aerating bubbles mixed with water flow to rise, and there is no need to install additional circulation equipment such as water pumps. The breeding farm only uses Roots blowers for aeration to drive the circulating water, which greatly reduces the cost of supporting equipment for the breeding pond and the operating energy consumption. At the same time, the bubble aggregation and rupture can be used to separate protein, thereby improving the water quality treatment efficiency.

[0019] 3. The timing layout of microbial and algae filtration is reasonable. The water flow with mixed bubbles initially has a high dissolved oxygen content. When it enters the water storage barrel and rises gradually, the dissolved oxygen is fully utilized in the process of microbial decomposition to produce organic matter. The discharged dissolved carbon dioxide continues to enter the algae attachment plate with the water flow. Carbon dioxide becomes the raw material for algae photosynthesis. The dissolved oxygen discharged after the algae absorbs and assimilates nitrogen and phosphorus nutrients continues to flow back with the water flow to increase the dissolved oxygen content of the water layer at the bottom of the pond, which can greatly improve the survival rate of aquaculture species and thus increase the aquaculture density.

[0020] Therefore, the present invention has the advantages of high filtering efficiency, low cost, low energy consumption and good breeding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side view of the pneumatic in-situ circulation ecological filtration system of the present invention;

[0022] Figure 2 It is a three-dimensional perspective view of the pneumatic in-situ circulation ecological filtration system of the present invention;

[0023] Figure 3 It is a perspective view of the specific structure of the pneumatic generator in the pneumatic in-situ circulation ecological filtration system of the present invention.

[0024] In the figure, there are water lifting pipe-1, pneumatic generator-2, water guide pipe-3, fixer-4, valve-5, water storage barrel-6, microbial filter material-7, barrier filter-8, algae attachment square plate-9, microporous cross plate-10, full spectrum lamp-11, and drainage pipe-12. DETAILED DESCRIPTION

[0025] In order to better understand the present invention, the present invention is further described below in conjunction with specific embodiments and accompanying drawings. It should be understood by those skilled in the art that the following embodiments are used to illustrate the present invention and should not be regarded as limiting the present invention in any way. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention. The scope of rights claimed for protection in the present invention is described by the claims.

[0026] It should be noted that when an element is referred to as "fixed" to another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right", "high", "low" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] like Figure 1-3 As shown, the aquaculture water treatment device in Example 1 is the following device:

[0029] A pneumatic in-situ circulating ecological filtration system comprises a water lifting pipe 1, a water storage barrel 6 and an algae attachment square plate 9, wherein the upper end of the water lifting pipe 1 is connected with a valve 5 for discharging water to control a water flow switch, the lower end of the water lifting pipe 1 is connected with a pneumatic generator 2, the water lifting pipe 1 is fixedly connected with a water guide pipe 3 through a fixture 4, the fixture 4 passes through the barrel wall of the water storage barrel 6, the water guide pipe 3 is located in the water storage barrel 6, and the upper end of the water guide pipe 3 is located below the valve 5, the upper end of the water guide pipe 3 is connected with a reducing interface, the diameter of the reducing interface gradually increases along the upper end opening direction, the lower end of the water guide pipe 3 extends to the bottom of the water storage barrel 6, and a gap of 1-2 cm is reserved with the bottom of the water storage barrel 6, so that water flows smoothly into the water storage barrel 6. A microbial filter material 7 is provided in the water storage square barrel 6, and a blocking filter screen 8 is installed above the microbial filter material 7. A water guide opening is provided on one side of the water storage square barrel 6 above the blocking filter screen 8, and the water guide opening is fixedly connected to the algae attachment square plate 9 to guide the water flow into the algae attachment square plate 9. A microporous cross plate 10 is laid on the surface of the algae attachment square plate 9. The heights of both ends of the algae attachment square plate 9 are higher than the height of the aquaculture water. A full-spectrum lamp 11 is provided above the algae attachment square plate 9 to promote the growth of algae. A drain pipe 12 is connected to one side of the algae attachment square plate 9.

[0030] A porous aeration plate is arranged inside the pneumatic generator 2, which is connected to the existing aeration pipe of the breeding pond. The diameter of the pneumatic generator 2 is larger than the diameter of the water lifting pipe 1, and the bubbles generated by the mixed water flow float upward with the diameter change and aggregation effect.

[0031] The fixer 4 is an annular clamp, which fixes the water lifting pipe 1 and the water guiding pipe 3 .

[0032] The cross-sectional width of the water storage square barrel 6 is less than or equal to the width of the algae attachment square plate 9. The algae attachment square plate 9 is tilted, the water inlet end is higher than the water outlet end, and the height of the water outlet end is slightly higher than the height of the aquaculture water, that is, the height of the water guide opening of the water storage square barrel 6 is higher than the algae attachment square plate 9, guiding the water flow into the algae attachment square plate 9, and the highest point of the water storage square barrel 6 is higher than the height of the aquaculture water.

[0033] The height of the blocking filter 8 is lower than the water guide opening, the cross section of the blocking filter 8 is the same as the cross section of the water storage barrel 6, and the filter aperture of the blocking filter 8 is smaller than the diameter of the microbial filter material 7, which intercepts large pieces of solid waste and prevents the microbial filter material 7 from floating up and overflowing.

[0034] The microbial filter material 7 is a high-temperature sintered stone or a plastic sponge fluidized bed filler, and the filling height of the microbial filter material 7 is the same as the aquaculture water depth.

[0035] The drainage pipe 12 is in a U-shaped structure, and a hole is opened in the wall of the horizontal pipe at the bottom of the drainage pipe 12 to guide the circulating water to flow back.

[0036] The bubbles released by the pneumatic generator 2 are polymerized to reduce their diameters, and the mixed gas and liquid float evenly and quickly along the water lifting pipe 1. After being discharged from the water lifting pipe 1, the water flows continuously from the upper end of the water guide pipe 3 to the bottom of the water storage barrel 6. The water level of the water storage barrel 6 continues to rise, and it is fully in contact with the microbial filter material 7 during the rising process. Using the principle of the interconnector, after the water level rises above the blocking filter 8, it flows into the algae attachment square plate 9 from the inclined opening on one side of the water storage barrel 6. Under the action of gravity, the water flows from the higher side of the algae attachment square plate 9 to the lower side, and continuously flushes the microporous cross plate 10, and flows into the drain pipe 12 at the openings on both bottom sides of the algae attachment square plate 9. At the water outlet hole of the middle horizontal pipe at the lower end of the drain pipe 12, it is evenly diverted to the bottom of the breeding pond, completing the system water circulation process.

[0037] Example 1

[0038] The pneumatic in-situ circulating ecological filtration system of the present invention can be applied to indoor and outdoor breeding ponds for aquaculture.

[0039] The pneumatic in-situ circulating ecological filtration system of the present invention is placed horizontally at the bottom of the breeding pond. The water storage barrel is filled with microbial filter material to facilitate the attachment and growth of microorganisms with Bacillus licheniformis as the dominant flora. The amount of microbial filter material is based on the fact that the filter material does not squeeze the blocking filter screen after the water storage barrel is filled with water. The external ventilation part of the pneumatic generator is connected to the aeration pipeline of the breeding pond. When the aeration of the breeding pond begins, the side wall of the pneumatic generator that has a water absorption function can be used to make an isolation frame with a fish collection gauze for the breeding pond to prevent small aquatic seedlings from being sucked in and dying and causing losses.

[0040] The full-spectrum lamps required by the pneumatic in-situ circulation ecological filtration system can replace the lighting of the aquaculture pond and be turned on all the time. If the ceiling of the aquaculture site is transparent, sunlight can be used during the day and the full-spectrum lamps can be turned on at night.

[0041] The final concentration of 10 8 cfu / mL bacterial solution, using Chlorella vulgaris to make a final concentration of 10 7 ind / mL algae liquid; a 65-ton breeding pond, with grass carp standard seedlings and seedlings in the pond as the initial state of breeding, 350 grass carp were put in, 30g / tail, and more than 6 L of the two liquids were added to the water storage barrel and algae attachment plate of the pneumatic in-situ circulating ecological filtration system, and the filtration system was connected to the aeration system in the original breeding pond.

[0042] The algae attachments were scraped off every 7 days, leaving about 2mm of algae attachments on the surface of the board. After scraping, 1.3L of the above liquid was added respectively, so that the microbial probiotics and algae continued to occupy the main ecological niche during a breeding cycle, preventing the formation of harmful algae and bacteria communities in the water of the breeding pond from microecological succession. The water was not changed during the breeding process, and 200g of extruded feed was fed daily, divided into 5 times. The breeding continued for 5 months, 331 tails survived, the survival rate was 94.6%, and the average weight was 150g / tail. During the breeding period, the ammonia nitrogen and nitrite contents in the breeding water were monitored daily, both of which were less than 3×10 -4 mg / L.

[0043] Comparative Example 1

[0044] This comparative example 1 was carried out simultaneously with the above embodiment 1. In comparative example 1, no liquid was added, and no equipment was set up. In a 65-ton grass carp breeding pond after the fry was marked, 350 grass carp were put in, 30 g / tail, and uninterrupted aeration was maintained. During the breeding process, a water pump was used to replace 20% of the breeding water volume every day, and new water was re-injected. 200 g of puffed feed was fed every day, divided into 5 times. The breeding was continued for 5 months, 290 fish survived, the survival rate was 82.9%, and the average weight was 140 g / tail. During the breeding period, ammonia nitrogen and nitrite in the breeding water were monitored daily. In the late breeding period, before changing the water every next day, the ammonia nitrogen monitoring exceeded 0.5 mg / L, and the nitrite exceeded 0.2 mg / L.

[0045] Comparative Example 2

[0046] This comparative example 2 was carried out simultaneously with the above embodiment 1 and comparative example 1. In comparative example 2, in a 65-ton grass carp breeding pond after the fry was marked, 350 grass carp were put in after the fry was marked and released as the starting state, 30 g / tail, uninterrupted aeration was maintained, and the water was not changed during the breeding process. The same amount of microbial filter material as in the water storage barrel of embodiment 1 was put into the breeding pond, and the final concentration was 10 8 cfu / mL Bacillus licheniformis solution, final concentration is 10 7 ind / mL Chlorella liquid was added 6 L respectively, and 1.3 L of the above two liquids were added every 7 days. 200 g of extruded feed was fed daily, divided into 5 feedings. The culture was continued for 5 months, 308 fish survived, with a survival rate of 88.0%, and an average weight of 146 g / fish. Ammonia nitrogen and nitrite in the aquaculture water were monitored daily during the culture period. Water quality was monitored daily in the later stage of the culture period. The ammonia nitrogen monitoring value was 0.1-0.4 mg / L, and nitrite exceeded 0.1-0.2 mg / L.

[0047] According to the breeding conditions of Example 1, Comparative Example 1 and Comparative Example 2, the main differential breeding parameters are summarized and the results are shown in Table 1.

[0048] Table 1 Comparison of breeding parameters

[0049] project Example 1 Comparative Example 1 Comparative Example 2 Number of survivors 331 290 308 Survival rate 94.6% 82.9% 88.0% Water change No water change Daily average 20% No water change Ammonia nitrogen <![CDATA[<3×10 -4 mg / L]]> >0.5mg / L 0.1-0.4 mg / L Nitrite <![CDATA[<3×10 -4 mg / L]]> >0.2mg / L 0.1-0.2 mg / L

[0050] It can be seen from the breeding conditions of the above-mentioned Example 1, Comparative Example 1 and Comparative Example 2 that the breeding survival rate of Example 1 is relatively high. The pneumatic in-situ circulating ecological filtration system provided by the present invention can increase the dissolved oxygen in water and stabilize the water quality, thereby increasing the aquaculture density, survival rate and yield, and has the advantages of high filtration efficiency, low cost, low energy consumption and good breeding effect.

[0051] Although the embodiments of the present invention are described above in conjunction with the embodiments, it should be noted that the described embodiments are only a part of the specific implementation of the present invention and are not intended to limit the scope of protection of the present invention. For those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the scope of protection of the present invention.

Claims

1. A pneumatic in-situ circulating ecological filtration system, characterized by: The invention comprises a water lifting pipe (1), a water storage barrel (6) and an algae attachment square plate (9), wherein the upper end of the water lifting pipe (1) is connected to a valve (5) for discharging water, the lower end of the water lifting pipe (1) is connected to a pneumatic generator (2), the water lifting pipe (1) is fixedly connected to a water guide pipe (3) via a fixing device (4), the fixing device (4) passes through the barrel wall of the water storage barrel (6), the water guide pipe (3) is located in the water storage barrel (6), and the upper end of the water guide pipe (3) is located below the valve (5), the upper end of the water guide pipe (3) is connected to a reducing interface, the diameter of the reducing interface gradually increases along the upper end opening direction, and the water guide pipe (3) The lower end extends to the bottom of the water storage square barrel (6), wherein a microbial filter material (7) is arranged in the water storage square barrel (6), and a blocking filter screen (8) is installed above the microbial filter material (7). A water guide opening is arranged on one side of the water storage square barrel (6) above the blocking filter screen (8), and the water guide opening is fixedly connected to the algae attachment square plate (9) to guide water flow into the algae attachment square plate (9). A microporous cross plate (10) is laid on the surface of the algae attachment square plate (9), and a full-spectrum lamp (11) is arranged above the algae attachment square plate (9). A drainage pipe (12) is connected to one side of the algae attachment square plate (9).

2. The pneumatic in-situ circulation ecological filtration system according to claim 1 is characterized in that: The pneumatic generator (2) is provided with a porous aeration disk inside, and the porous aeration disk is connected to an external aeration pipe.

3. The pneumatic in-situ circulation ecological filtration system according to claim 1 is characterized in that: The fixer (4) is an annular clamp, which fixes the water lifting pipe (1) and the water guide pipe (3).

4. The pneumatic in-situ circulation ecological filtration system according to claim 1 is characterized in that: The cross-sectional width of the water storage square barrel (6) is less than or equal to the width of the algae attachment square plate (9).

5. The pneumatic in-situ circulation ecological filtration system according to claim 1 is characterized in that: The algae attachment square plate (9) is arranged obliquely, with the water inlet end being higher than the water outlet end.

6. The pneumatic in-situ circulation ecological filtration system according to claim 1 is characterized in that: The microbial filter material (7) is a high-temperature sintered stone or a plastic sponge fluidized bed filler, and the filling height of the microbial filter material (7) is the same as the water depth.

7. The pneumatic in-situ circulation ecological filtration system according to claim 1 is characterized in that: The drainage pipe (12) has a U-shaped structure, and a hole is opened on the bottom transverse pipe wall of the drainage pipe (12) to guide the circulating water to flow back.

8. Application of the pneumatic in-situ circulating ecological filtration system as described in any one of claims 1 to 7 in aquaculture, wherein the pneumatic in-situ circulating ecological filtration system is applied to aquaculture ponds.

9. The use according to claim 8, characterized in that: The preparation of the aquaculture water in the aquaculture pond is as follows: the probiotic powder is used to prepare a final concentration of 10 6 -10 11 cfu / mL bacterial solution, using non-blooming microalgae to make a final concentration of 10 4 -10 8 ind / mL algae liquid, and 1-2 L of the above liquid was evenly applied for every 10 tons of aquaculture water volume.

10. The use according to claim 9, characterized in that: The aquaculture pond is treated as follows: the algae attachments are scraped off once every 5-7 days, leaving about 1-5 mm thick algae attachments on the surface of the microporous cross plate (10), and after scraping, 100-500 mL of the above liquid is added for every 10 tons of aquaculture water volume.

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