Compact energy-saving and water-saving recirculating aquaculture system

Abstract

The invention relates to a compact energy-saving and water-saving recirculating aquaculture system, and belongs to the technical field of water treatment. The compact energy-saving circulating water culture system comprises a culture unit, the culture unit comprises a plurality of culture ponds, a plurality of vertical flow precipitators, a filter press, an MBBR pond, a denitrification tank, a plurality of microfilters, a plurality of foam skimming devices, a water temperature adjusting pond, a biochemical pond and an ultraviolet pond, and a multi-branch circulating water loop is formed in the system by reasonably designing the system structure. Pollutants in culture water can be effectively removed, the cyclic utilization rate of the culture water is increased, and a healthy and suitable growth environment is provided for cultured organisms in the culture pond.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a compact energy-saving and water-saving circulating water aquaculture system. Background Art

[0002] At present, most aquatic animals are farmed in ponds, and it is difficult to control the water quality. If the remaining bait and aquatic animal excrement in the pond cannot be discharged in time, they are easy to rot and deteriorate, resulting in the deterioration of the aquaculture water environment, and the water quality needs to be updated. The existing method is to dig inlet ditches and drainage ditches to change the water. This water change method is costly and inefficient.

[0003] However, the current recirculating aquaculture system has an unreasonable structural design, occupies a large area, has a single water circulation pathway, and has low efficiency.

[0004] Therefore, it is very necessary to design a compact energy-saving circulating aquaculture system. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a compact energy-saving circulating aquaculture system with a more reasonable structural design and a laminate that is not prone to interlayer cracking and peeling.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A compact energy-saving and water-saving circulating water aquaculture system comprises an aquaculture unit, wherein the aquaculture unit comprises a plurality of aquaculture pools, a plurality of vertical flow precipitators, a filter press, an MBBR pool, a denitrification tank, a plurality of microfilters, a plurality of foam skimmers, a water temperature regulating pool, a biochemical pool, and an ultraviolet pool; the plurality of vertical flow precipitators are arranged in a one-to-one correspondence with the plurality of aquaculture pools, the bottom water outlets of the plurality of aquaculture pools are respectively connected to the water inlets of the plurality of vertical flow precipitators through pipelines, the water outlets of the vertical flow precipitators are connected to the water inlet of the filter press through pipelines, the water outlet of the filter press is connected to the water inlet of the MBBR pool through pipelines, the water outlet of the MBBR pool is connected to the water inlet of the denitrification tank through pipelines, and the water outlet of the MBBR pool is connected to the water inlet of the denitrification tank through pipelines. The water outlet of the denitrification tank is connected to the water inlet of the water temperature regulating pool through a pipeline, the water inlet of the water temperature regulating pool is connected to the water inlet of the biochemical pool through a pipeline and a water pump, the water outlet of the biochemical pool is connected to the water inlet of the ultraviolet pool through a pipeline, and the water outlet of the ultraviolet pool is connected to the water inlet of the breeding pool through a pipeline and a water channel; a plurality of microfilters are arranged in a one-to-one correspondence with a plurality of breeding pools, the overflow ports of the plurality of breeding pools are respectively connected to the water inlets of a plurality of microfilters through pipelines, the water outlet of the microfilter is connected to the foam skimmer through a pipeline, and the water outlet of the foam skimmer is connected to the water inlet of the biochemical pool through a pipeline and a water pump.

[0008] Preferably, the water outlet of the foam skimmer is also connected to the water inlet of the water temperature regulating tank through a pipeline and a water pump, and the residue outlet of the microfilter is connected to the water inlet of the filter press through a pipeline.

[0009] Preferably, the overflow port of the breeding pond is located above the bottom water outlet of the breeding pond; a dead fish collector is provided in the breeding pond, and a double drain treatment device is provided at the bottom water outlet of the breeding pond. The double drain treatment device can be a double-row fish toilet; a surface drainer is provided at the overflow port of the breeding pond.

[0010] Preferably, the water temperature regulating pool is equipped with a water source heat pump temperature control device.

[0011] Preferably, the breeding unit also includes an equipment pool, and the microfilter, foam skimmer, water temperature regulating pool and water pump are arranged in the equipment pool.

[0012] Preferably, in the culture pond unit, several culture ponds are arranged in sequence to form a culture pond group, the number of the culture pond units is not less than two, and the culture pond group of not less than two culture pond units is arranged in sequence, and an aisle is provided between any two adjacent culture pond units. The aisle, equipment pool, biochemical pool, ultraviolet pool, and denitrification tank are arranged in sequence around the culture pond group, and the water channel is located between the biochemical pool and the culture pond group.

[0013] Preferably, the biochemical pool includes a fixed bed pool and four fluidized bed pools connected in sequence; among the four fluidized bed pools connected in sequence, the water outlet of the upper fluidized bed pool is connected with the water inlet of the next fluidized bed pool through a water passage, and the water outlet of the fluidized bed pool at the tail end is connected with the input of the fixed bed pool through a water passage; two grid plates are horizontally arranged in the fluidized bed pool, the two grid plates are located between the water outlet of the fluidized bed pool and the water inlet of the fluidized bed pool, a filler is arranged between the two grid plates, and a plurality of biological ropes are vertically arranged in the fixed bed pool.

[0014] Further preferably, both ends of the biological rope are respectively connected to fixing rods, and the fixing rods are fixed in the fixed bed pool through cross bars.

[0015] Further preferably, the fixed bed pool and the four sequentially connected fluidized bed pools are respectively provided with an aeration head, and the aeration head is connected to a blower through a pipeline.

[0016] Further preferably, the biological rope is made of polypropylene fiber, and a plurality of biological ropes are distributed at equal intervals in the fixed bed pool.

[0017] Further preferably, the water inlet of the fluidized bed pool is located below the water outlet of the fluidized bed pool; and the water inlet of the fixed bed pool is located below the water outlet of the fixed bed pool.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The breeding unit of the system of the present invention includes several breeding ponds, several vertical flow sedimentation tanks, filter presses, MBBR pools, denitrification tanks, several microfiltration machines, several foam skimmers, water temperature regulating pools, biochemical pools, and ultraviolet pools. By rationally designing the system structure, a multi-branched circulating water loop is formed in the system, which can effectively remove pollutants in the breeding water, improve the recycling rate of the breeding water, and provide a healthy and suitable growth environment for the breeding organisms in the breeding pond. In addition, the system of the present invention places the biochemical pool and the ultraviolet pool under the aisles on both sides, and does not need to occupy additional space to build the biochemical pool, saving land. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the integrated installation of a compact energy-saving and water-saving circulating aquaculture system provided by the present invention;

[0021] Figure 2 A cross-sectional view of a biochemical pool provided by the present invention;

[0022] Figure 3 This is a schematic structural diagram of the compact energy-saving circulating aquaculture system provided by the present invention.

[0023] In the figure, 1-breeding pond, 2-vertical flow sedimentation tank, 3-filter press, 4-MBBR pool, 5-denitrification tank, 6-microfiltration machine, 7-foam skimmer, 8-water temperature regulating tank, 9-biochemical pool, 10-ultraviolet pool, 11-channel, 12-dead fish collector, 13-double sewage treatment device, 14-surface sewage discharger, 15-high-pressure oxygen water supply tank, 16-equipment pool, 17-aisle, 18-fixed bed pool, 19-flowing bed pool, 20-water channel, 21-grid plate, 22-filler, 23-biological rope, 24-fixed rod, 25-cross rod, 26-aeration head. DETAILED DESCRIPTION

[0024] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0025] See also Figures 1 to 3The present invention provides a compact energy-saving and water-saving circulating water aquaculture system including a breeding unit, wherein the breeding unit includes a plurality of breeding pools 1, a plurality of vertical flow sedimentators 2, a filter press 3, an MBBR pool 4, a denitrification tank 5, a plurality of microfilters 6, a plurality of foam skimmers 7, a water temperature regulating pool 8, a biochemical pool 9, and an ultraviolet pool 10; the plurality of vertical flow sedimentators 2 are arranged in a one-to-one correspondence with the plurality of breeding pools 1, the bottom water outlets of the plurality of breeding pools 1 are respectively connected to the water inlets of the plurality of vertical flow sedimentators 2 through pipelines, the water outlets of the vertical flow sedimentators 2 are connected to the water inlet of the filter press 3 through pipelines, the water outlets of the filter press 3 are connected to the water inlet of the MBBR pool 4 through pipelines, and the water outlets of the MBBR pool 4 are connected to the water inlet of the denitrification tank 5 through pipelines. The water outlet of the denitrification tank 5 is connected to the water inlet of the water temperature regulating tank 8 through a pipeline, the water inlet of the water temperature regulating tank 8 is connected to the water inlet of the biochemical tank 9 through a pipeline and a water pump, the water outlet of the biochemical tank 9 is connected to the water inlet of the ultraviolet tank 10 through a pipeline, and the water outlet of the ultraviolet tank 10 is connected to the water inlet of the breeding pool 1 through a pipeline and a water channel 11; a plurality of microfilters 6 are arranged in a one-to-one correspondence with a plurality of breeding pools 1, the overflow ports of a plurality of breeding pools 1 are respectively connected to the water inlets of a plurality of microfilters 6 through pipelines, the water outlet of the microfilter 6 is connected to the foam skimmer 7 through a pipeline and a water pump, the water outlet of the foam skimmer 7 is connected to the water inlet of the biochemical tank 9 through a pipeline, and the residue outlet of the microfilter 6 is connected to the water inlet of the filter press 3 through a pipeline.

[0026] In one embodiment, the overflow port of the culture pond 1 is located above the bottom water outlet of the culture pond 1; a dead fish collector 12 is provided in the culture pond 1, and a double drain treatment device 13 is provided at the bottom water outlet of the culture pond 1. The double drain treatment device can be a double-row fish toilet; a surface drain 14 is provided at the overflow port of the culture pond 1.

[0027] In one embodiment, each culture pond 1 is equipped with a high-pressure oxygen water supply tank 15 and a high-pressure oxygen water supply pump, and the high-pressure oxygen water supply tank 15, the high-pressure oxygen water supply pump and the culture pond 1 are connected to form a circulation loop through a pipeline. The high-pressure oxygen water supply tank 15 is connected to an aeration pump. When in use, the water of the culture pond 1 is input into the high-pressure oxygen water supply tank 15 through the high-pressure oxygen water supply pump, and the high-pressure oxygen is injected into the water body of the high-pressure oxygen water supply tank 15 through the aeration pump to increase the dissolved oxygen content in the water, and the water in the high-pressure oxygen water supply tank 15 is returned to the culture pond through the high-pressure oxygen water supply pump.

[0028] In one embodiment, the water temperature regulating pool 8 is equipped with a water source heat pump temperature control device, which regulates the water temperature in the water temperature regulating pool 8 .

[0029] In one embodiment, the UV pool 10 is equipped with a UV disinfection device.

[0030] In one embodiment, the breeding unit further comprises an equipment pool 16 , in which the microfilter 6 , the foam skimmer 7 , the water temperature regulating pool 8 and various water pumps are arranged.

[0031] In one embodiment, in the culture pond unit, a plurality of culture ponds 1 are arranged in sequence to form a culture pond group, the number of culture pond units is not less than two, and the culture pond group of not less than two culture pond units is arranged in sequence, and an aisle 17 is provided between any two adjacent culture pond units. The aisle 17, the equipment pool 16, the biochemical pool 9, the ultraviolet pool 10, and the denitrification tank 5 are arranged in sequence around the culture pond group, and the water channel 11 is located between the biochemical pool 9 and the culture pond group.

[0032] The present invention achieves the purpose of saving floor space by improving the system structure and then reasonably arranging it.

[0033] The water inlet of the water temperature regulating pool 8, the water inlet of the biochemical pool 9, the water inlet of the ultraviolet pool 10, the water inlet of the denitrification tank 5 and the water inlet of the MBBR pool 4 are at the same horizontal plane, and the water outlet of the water temperature regulating pool 8, the water outlet of the biochemical pool 9, the water outlet of the ultraviolet pool 10, the water outlet of the denitrification tank 5 and the water outlet of the MBBR pool 4 are at the same horizontal plane. The water inlet of each pool is located below the water outlet of each pool.

[0034] In one embodiment, the water pump is an axial flow pump or a mixed flow pump. Compared with a centrifugal pump and a submersible pump, the axial flow pump or the mixed flow pump requires less power, thereby achieving the purpose of energy saving.

[0035] In one embodiment, the biochemical pool 9 includes a fixed bed pool 18 and four fluidized bed pools 19 connected in sequence; among the four fluidized bed pools 19 connected in sequence, the water outlet of the upper fluidized bed pool 19 is connected to the water inlet of the next fluidized bed pool 19 through a water passage 20, and the water outlet of the fluidized bed pool 19 at the tail end is connected to the input port of the fixed bed pool 18 through a water passage 20; two grid plates 21 are horizontally arranged in the fluidized bed pool 19, the two grid plates 21 are located between the water outlet of the fluidized bed pool 19 and the water inlet of the fluidized bed pool 19, a filler 22 is arranged between the two grid plates 21, and a plurality of biological ropes 23 are vertically arranged in the fixed bed pool 18.

[0036] Specifically, both ends of the biological rope 23 are respectively connected to fixing rods 24 , and the fixing rods 24 are fixed in the bed pool 18 through cross bars 25 .

[0037] Specifically, an aeration head 26 is respectively provided in the fixed bed pool 18 and the four fluidized bed pools 19 that are connected in sequence, and the aeration head 26 is connected to the blower through a pipeline.

[0038] Specifically, the filler 22 is K5 filler.

[0039] Specifically, the biological rope 23 is made of polypropylene fiber, the porosity of the biological rope 23 is 70-95%, and a plurality of biological ropes 23 are distributed at equal intervals in the fixed bed pool 18 .

[0040] Specifically, the filling rate of the filler 22 in the fluidized bed pool 19 is 30-80%.

[0041] Specifically, the water inlet of the fluidized bed pool 19 is located below the water outlet of the fluidized bed pool 19 ; the water inlet of the fixed bed pool 18 is located below the water outlet of the fixed bed pool 18 .

[0042] The process of realizing the recycling of aquaculture water by using the system of the present invention is as follows:

[0043] The polluted water discharged from the bottom outlet of the culture pond 1 enters the vertical flow sedimentation device 2 through a pipeline for treatment, and the residual bait, feces and other particles in the water are separated because the gravity is stronger than the supporting effect of the rising water flow; the water discharged from the overflow port of the culture pond 1 enters the microfiltration machine 6 through a pipeline for physical filtration, and the tiny particles with a particle size of 0.1 to 3 mm in the polluted water are intercepted by the filter screen;

[0044] The organic pollutants discharged from the vertical flow sedimentation tank 2 and the organic pollutants discharged from the microfilter 6 enter the filter press 3 through pipelines respectively, and are filtered by the filter press 3 to produce solid residues and high-concentration sewage; the high-concentration sewage produced enters the MBBR pool 4 through pipelines for treatment, and further degrades harmful indicators such as ammonia nitrogen and nitrite; the effluent of the MBBR pool 4 enters the denitrification tank 5 through pipelines for denitrification treatment;

[0045] The filtered water discharged from the denitrification tank 5 and the filtered water discharged from the microfilter 6 can be respectively input into the water temperature regulating tank 8 through pipelines for water temperature adjustment; the present invention can also directly input the filtered water discharged from the microfilter 6 into the foam skimmer 7 for treatment to remove small pollutants such as macromolecular organic matter, bacterial flocs, algae, etc., and simultaneously complete the removal of carbon dioxide;

[0046] The effluent from the water temperature regulating pool 8 enters the biochemical pool 9 for treatment. The biochemical pool 9 adopts a dual biological treatment process combining a fluidized bed and a fixed bed. The fluidized bed uses K5 filler, which is more friendly than traditional fillers and has a higher biofilm formation efficiency. The fixed bed uses a hydrophilic biochemical blanket, which can intercept inorganic suspended matter in the water while participating in the biochemical reaction. The linked blower continuously aerates the water in the biochemical pool 9, causing the biochemical filler in the fluidized bed pool to float up and down, and creates beneficial dissolved oxygen conditions for the biochemical reaction of the cultured bacteria, thereby achieving the degradation and transformation of soluble pollutants.

[0047] The effluent from the biochemical pool 9 enters the ultraviolet pool 10 for disinfection treatment, in which ultraviolet rays are used to kill bacteria, viruses and algae in the water, and the AOT photocatalytic sterilization and disinfection equipment is used to synergistically produce hydroxyl free radicals with strong oxidizing properties, so as to further disinfect the water body efficiently; the water body after disinfection can be used as aquaculture water and re-enter the aquaculture pool 1, thereby realizing the recycling of aquaculture water and achieving the purpose of energy and water saving.

[0048] The present invention can not only recycle the breeding water, but also supply oxygen-rich water to the breeding pond through devices such as a high-pressure oxygen water supply tank and a water supply pump, thereby ensuring a good living environment for aquatic animals in the breeding pond.

[0049] In the description of the present invention, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. All directional indicators (such as up and down) in the present invention are only used to explain the relative position relationship, movement, etc. between the various parts under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In the description of the present invention, it should also be noted that the terms "include", "have" and any variations thereof are intended to cover non-exclusive inclusions.

[0051] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A compact energy-saving and water-saving circulating aquaculture system, characterized in that: The invention comprises a breeding unit, wherein the breeding unit comprises a plurality of breeding pools, a plurality of vertical flow precipitators, a filter press, an MBBR pool, a denitrification tank, a plurality of microfilters, a plurality of foam skimmers, a water temperature regulating pool, a biochemical pool, and an ultraviolet pool; the plurality of vertical flow precipitators are arranged in a one-to-one correspondence with the plurality of breeding pools, the bottom water outlets of the plurality of breeding pools are respectively connected to the water inlets of the plurality of vertical flow precipitators through pipelines, the water outlets of the vertical flow precipitators are connected to the water inlet of the filter press through pipelines, the water outlet of the filter press is connected to the water inlet of the MBBR pool through pipelines, the water outlet of the MBBR pool is connected to the water inlet of the denitrification tank through pipelines, and the The water outlet of the denitrification tank is connected to the water inlet of the water temperature regulating pool through a pipeline, the water inlet of the water temperature regulating pool is connected to the water inlet of the biochemical pool through a pipeline and a water pump, the water outlet of the biochemical pool is connected to the water inlet of the ultraviolet pool through a pipeline, and the water outlet of the ultraviolet pool is connected to the water inlet of the breeding pool through a pipeline and a water channel; a plurality of microfilters are arranged in a one-to-one correspondence with a plurality of breeding pools, the overflow ports of the plurality of breeding pools are respectively connected to the water inlets of a plurality of microfilters through pipelines, the water outlet of the microfilter is connected to a foam skimmer through a pipeline, and the water outlet of the foam skimmer is connected to the water inlet of the biochemical pool through a pipeline and a water pump.

2. The compact energy-saving circulating aquaculture system according to claim 1, characterized in that: The water outlet of the foam skimmer is also connected to the water inlet of the water temperature regulating tank through a pipeline and a water pump, and the residue outlet of the microfilter is connected to the water inlet of the filter press through a pipeline.

3. The compact energy-saving circulating aquaculture system according to claim 1, characterized in that: The overflow port of the breeding pond is located above the bottom water outlet of the breeding pond; a dead fish collector is arranged in the breeding pond, and a double drain processor is arranged at the bottom water outlet of the breeding pond.

4. The compact energy-saving circulating aquaculture system according to claim 1, characterized in that: The breeding unit also includes an equipment pool, in which the microfilter, foam skimmer, water temperature regulating pool and water pump are arranged.

5. The compact energy-saving circulating aquaculture system according to claim 1, characterized in that: In the breeding pond unit, several breeding ponds are arranged in sequence to form a breeding pond group. The number of the breeding pond units is not less than two, and the breeding pond group of not less than two breeding pond units is arranged in sequence. An aisle is provided between any two adjacent breeding pond units. The aisle, equipment pool, biochemical pool, ultraviolet pool, and denitrification tank are arranged in sequence around the breeding pond group, and the water channel is located between the biochemical pool and the breeding pond group.

6. The compact energy-saving circulating aquaculture system according to claim 1, characterized in that: The biochemical pool includes a fixed bed pool and four fluidized bed pools connected in sequence; among the four fluidized bed pools connected in sequence, the water outlet of the upper fluidized bed pool is connected with the water inlet of the next fluidized bed pool through a water passage, and the water outlet of the fluidized bed pool at the tail end is connected with the input of the fixed bed pool through a water passage; two grid plates are horizontally arranged in the fluidized bed pool, the two grid plates are located between the water outlet of the fluidized bed pool and the water inlet of the fluidized bed pool, a filler is arranged between the two grid plates, and a plurality of biological ropes are vertically arranged in the fixed bed pool.

7. The compact energy-saving circulating aquaculture system according to claim 6, characterized in that: Both ends of the biological rope are respectively connected with fixing rods, and the fixing rods are fixed in the fixed bed pool through cross bars.

8. The compact energy-saving circulating aquaculture system according to claim 6, characterized in that: The fixed bed pool and the four fluidized bed pools connected in sequence are respectively provided with an aeration head, and the aeration head is connected to the blower through a pipeline.

9. The compact energy-saving circulating aquaculture system according to claim 6, characterized in that: The biological rope is made of polypropylene fiber, and a plurality of biological ropes are distributed in the fixed bed pool at equal intervals.

10. The compact energy-saving circulating aquaculture system according to claim 6, characterized in that: The water inlet of the fluidized bed pool is located below the water outlet of the fluidized bed pool; the water inlet of the fixed bed pool is located below the water outlet of the fixed bed pool.

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