CN111802309A

CN111802309A - Embedded land-based circular pond recirculating aquaculture system

Info

Publication number: CN111802309A
Application number: CN202010805673.XA
Authority: CN
Inventors: 鲍斌; 罗国强; 王超; 淳斌; 张振华; 景艳侠; 匡小玉; 黄庆; 汤德; 陈映宇; 张现忠; 刘洁; 李登洪; 吴高鹏; 柴子贵; 黄治钢
Original assignee: CHENGDU TONGWEI AUTOMATION EQUIPMENT CO LTD
Current assignee: CHENGDU TONGWEI AUTOMATION EQUIPMENT CO LTD
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2020-10-23

Abstract

An embedded land-based circular pond recirculating aquaculture system comprises an aquaculture pond, a water inlet system, a tail water discharge system, a sewage discharge treatment system and an outer pond, wherein the tail water discharge system comprises a tail water discharge pipeline and a drainage ditch, an inlet of the tail water discharge pipeline is arranged in the aquaculture pond, and the drainage ditch is connected with the outer pond; the sewage discharge treatment system comprises a sewage discharge pipeline, a sewage collecting well, a solid-liquid separation tank, a septic tank and a tail water processor, wherein the tail water processor is connected with the outer pond; the outer pond is connected with a water inlet system. The water quality oxygen content of the culture pond can be kept at the dissolved oxygen concentration suitable for fish growth, excrement and residual bait in the water body of the culture pond is gathered through the hydraulic centrifugal action in a quiet micro-flow state in a sewage and tail water separated discharge mode, the sewage discharge amount is reduced, the construction quantity of matched sewage treatment systems can be reduced, the construction cost and the operation cost of the sewage treatment systems are reduced, the treated sewage and the tail water are subjected to deep purification and then return to the culture pond for cyclic utilization, and the water resource utilization rate is improved.

Description

Embedded land-based circular pond recirculating aquaculture system

Technical Field

The invention relates to aquaculture equipment, in particular to a land-based aquaculture pond system.

Background

With the rapid development of economy in China, the living standard of people is continuously improved, fishes are more and more popular as high-quality protein food, the demand is more and more large, and the fish culture is rapidly developed. Although the net cage fish culture can greatly improve the fish yield per unit water surface, the fish excrement and the residual bait are directly discharged into the water bodies of rivers and lakes to pollute the water bodies, and the production is strictly limited. The building of a recirculating aquaculture pond is a great trend of aquaculture, and in order to ensure that fishes grow fast and healthily without leaving good water quality environment, and to improve the yield of unit water surface, the aquaculture density needs to be improved. In the existing culture pond, aeration pipes are mainly arranged in the culture pond for aeration, and the aeration pipes are aerated by an air blower, so that the oxygen utilization rate is low, the aeration effect is poor, the water body of the culture pond is also stirred, the severe rolling phenomenon of boiled water culture is caused, and the sedimentation of fish dung and residual bait is not facilitated. Present recirculating aquaculture pond blowdown utilizes the action of gravity to carry out the end row mostly, excrement and urine residual food in the pond of breeding can not discharge effectively, the emission of low pollution tail water mainly adopts the end row, the table is arranged, modes such as side row, can not realize discharging fast the ammonia nitrogen in breeding the pond, nitrite nitrogen, the suspended solid, foam oil film etc. influence breed, and some systems are that tail water discharges and blowdown go on in step, for guaranteeing quality of water, often through increaseing the inflow, most need 1 hour exchange 1 time, need supporting huge sewage treatment system, construction cost and running cost are high, the water consumption is big, water resource utilization is low, the treatment effect of sewage is relatively poor.

Disclosure of Invention

The invention aims to provide an embedded land-based circular pond circulating water aquaculture system, which keeps the oxygen content of the water quality of an aquaculture pond at the dissolved oxygen concentration suitable for fish growth by improving the concentration of dissolved oxygen in inlet water, gathers excrement residual bait in the water body of the aquaculture pond through the quiet micro-flow hydraulic centrifugal action in a mode of separately discharging sewage and tail water, reduces the discharge amount of the sewage, reduces the construction quantity of matched sewage treatment systems, reduces the construction cost and the operation cost of the sewage treatment systems, deepens the sewage treatment, and returns the treated sewage and the tail water after deep purification for aquaculture circulation utilization, thereby improving the utilization rate of water resources.

An embedded land-based circular pond recirculating aquaculture system comprises an aquaculture pond, a water inlet system, a tail water discharge system, a sewage discharge treatment system and an outer pond, wherein the tail water discharge system comprises a tail water discharge pipeline and a drainage ditch, an inlet of the tail water discharge pipeline is arranged in the aquaculture pond, and the drainage ditch is connected with the outer pond; the sewage discharge treatment system comprises a sewage discharge pipeline, a sewage collecting well, a solid-liquid separation tank, a septic tank and a tail water treater, wherein the tail water treater is connected with the outer pond through a pipeline; the outer pond is provided with a pipeline connected with a water inlet system, and the water inlet system is provided with a water inlet pipeline connected with the culture pond.

Furthermore, the culture pond is cylindrical, the bottom of the culture pond is conical, and a mesh partition plate is arranged above the conical top of the conical bottom.

Furthermore, the water inlet system comprises a water inlet pipeline and a water distribution pipe, wherein the water inlet pipeline is provided with an aerator, the water distribution pipe is connected to the water inlet pipeline, the water distribution pipe is vertically arranged along the wall of the culture pond and is positioned on the middle layer and the upper layer of the culture pond, and the water distribution pipe is provided with a water distribution port with the orientation being tangential and parallel to the wall of the culture pond.

Furthermore, an ultraviolet sterilizer is arranged on the water inlet pipeline.

Further, tail water discharge system, tail water discharge pipeline arrange along the lateral wall in cylindrical pond, downwardly extending to and conical bottom combination department slant center extend to central axis department, upwards extend to and often establish water level height department and change the level and arrange, are equipped with valve and tee bend at the horizontal segment, and one of tee bend leads to the opening and upwards sets up, and two other leads to connect on the pipeline, the horizontal segment extends to breed the pond and extends downwards to the escape canal.

Furthermore, the water inlet of the tail water discharge pipeline is positioned at the position of 5-20 cm away from the mesh partition plate on the conical axis of the bottom.

Further, sewage discharge system, sewage discharge pipeline install the conical top department of breeding the conical bottom in pond, connect gradually sewage collecting well, solid-liquid separation pond, and the soil pick-up pump of solid-liquid separation pond bottom carries the solid matter to shine the manure pit through the pipeline, and the supernatant on solid-liquid separation pond upper portion gets into the tail water treater.

Furthermore, the sewage discharge pipeline is provided with a valve and is connected to a tee joint in the sewage collecting well, the two through holes of the tee joint are vertically arranged in the sewage collecting well, and a hanging ball is arranged in the tee joint and is connected to the vertical motor.

Furthermore, a sewage pump is arranged in the sewage collecting well, and a pipeline connecting the sewage collecting well and the solid-liquid separation tank is connected to the sewage pump.

Furthermore, the outer pond comprises a solid-liquid separation pond, a microorganism curing treatment pond, a centralized treatment pond for aquatic plants and algae and an oxidation pond, and tail water sequentially passes through the ponds.

The invention can keep the oxygen content of the water quality of the culture pond at the dissolved oxygen concentration suitable for fish growth, and can gather the excrement and residual bait in the water body of the culture pond through the hydraulic centrifugal action in a quiet micro-flow state in a way of separately discharging sewage and tail water, thereby reducing the sewage discharge amount, reducing the construction quantity of matched sewage treatment systems, reducing the construction cost and the operation cost of the sewage treatment systems, deepening the sewage treatment, returning the treated sewage and the tail water to the culture pond for cyclic utilization after deep purification, and improving the water resource utilization rate.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of a water intake system according to the present invention;

FIG. 3 is a schematic view of a tail water discharge system of the present invention;

FIG. 4 is a schematic view of a sewage discharge treatment system according to the present invention.

In the figure: 1-culture pond, 2-water inlet system, 3-mesh partition plate, 4-tail water discharge system, 5-sewage discharge system, 6-outer pond, 7-pipeline, 21-ultraviolet sterilizer, 22-aerator, 23-water distributor, 24-water distributor, 25-water inlet pipeline, 26-water inlet channel, 41-tee joint, 42-drainage channel, 43-valve, 44-tail water discharge pipeline, 51-sewage collecting well, 52-solid-liquid separation pond, 53-tail water processor, 54-solarization pond, 55-sewage discharge pipeline, 56-valve, 57-tee joint, 58-sewage pump, 59-sewage suction pump, 61-solid-liquid separation pond, 62-microorganism solidification treatment pond, 63-aquatic plant and algae centralized treatment pond, 64-oxidation pond.

Detailed Description

The culture pond sewage is a water body which contains a large amount of fish excrement residual bait and is seriously polluted, and is different from the tail water of the culture pond. The tail water is a water body containing more soluble pollutants such as ammonia nitrogen, nitrite nitrogen and the like and a surface foam oil film, and the pollution degree is relatively light.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in fig. 1-4, an embedded land-based circular pond recirculating aquaculture system comprises an aquaculture pond 1, a water inlet system 2, a tail water discharge system 4, a sewage discharge treatment system 5 and an outer pond 6, wherein the tail water discharge system 4 comprises a tail water discharge pipeline 44 and a drainage ditch 42, an inlet of the tail water discharge pipeline 44 is arranged in the aquaculture pond 1, and the drainage ditch 42 is connected with the outer pond 6; the sewage discharge treatment system 5 comprises a sewage discharge pipeline 55, a sewage collecting well 51, a solid-liquid separation tank 52, a solarization tank 54 and a tail water treater 53, wherein the tail water treater 53 is connected with the outer pond 6 through a pipeline; the outer pond 6 is provided with a pipeline 7 connected with the water inlet system 2, and the water inlet system 2 is provided with a water inlet pipeline 25 connected with the culture pond 1.

Further, the culture pond 1 is cylindrical, the bottom of the culture pond is conical, and a mesh partition plate 3 is arranged above the conical top of the conical bottom. The bottom of the culture pond 1 is conical and forms a static dirt collecting area with the mesh partition plate 3, and the settled fish manure and residual bait are collected in the static dirt collecting area, and meanwhile, the fish and water flow are prevented from stirring to influence deposition.

Further, the water inlet system 2 comprises a water inlet pipe 25 and a water distribution pipe 23, wherein the water inlet pipe 25 is provided with an aerator 22, the water distribution pipe 23 is connected to the water inlet pipe 25, the water distribution pipe 23 is vertically arranged along the wall of the culture pond and is positioned on the middle and upper layers of the culture pond 1, and the water distribution pipe 23 is provided with a water distribution port 24 with the orientation tangential and parallel to the wall of the pond. The oxygen increasing machine 22 improves the dissolved oxygen amount of the inlet water, so that the dissolved oxygen amount in the culture pond 1 is kept at the concentration suitable for the growth of fishes, the mode that an aeration pipe and a fan are arranged in the existing culture pond to supply air for oxygen increasing is replaced, the adverse effect of fan noise on the growth of the fishes is avoided, a quiet culture environment is created, the sedimentation of the fish manure residual bait and the rapid growth of the fishes are facilitated, the tangential water distribution port 24 is used for manufacturing a microflow water swirling state while water is uniformly distributed, and the fish manure residual bait in the pond is driven to spirally rotate and is enriched to the bottom.

Further, an ultraviolet sterilizer 21 is arranged on the water inlet pipeline 25 to perform insect killing and sterilization on the inlet water. The outer pond 6 is conveyed to a water inlet ditch 26 through a pipeline 7, the water inlet ditch is provided with a filtering dam, particulate matters, algae and turbidity are intercepted, the transparency and the cleanliness of a water body are improved, and then a water inlet pump is used for pumping water into a water inlet pipeline.

Preferably, the filter dam is trapezoidal, and has a height of 1m, an upper width of 2m and a bottom width of 5 m. The filtering dam is composed of a plurality of layers of different materials, thick gravel, thick volcanic rock, thick active carbon, thick and thin sand and thick soil are arranged from bottom to top in sequence, and water purification plants are planted on the upper portion of the filtering dam.

Further, tail water discharge system 4, tail water discharge pipeline 44 are arranged along the lateral wall of cylindrical pond, downwardly extend to and conical bottom junction slant center extend to central axis department, upwardly extend to and often establish water level height department and change the level and arrange, are equipped with valve 43 and tee bend 41 in the horizontal segment, and one of tee bend 41 leads to the opening and upwards sets up, and two other leads to connect on the pipeline, the horizontal segment extends to breed 1 backward downwardly extending to escape canal 42 in the pond. The upward opening of the tee joint 41 serves as a water outlet of a surface drainage path, and meanwhile, the opening is communicated with air, so that the accident that water in the culture pond is pumped out through siphon is prevented.

The valve 43 is in a communicated state at ordinary times, the water bodies of the middle and lower layers are continuously discharged by the middle water outlet and the tail water discharge pipeline 44 at the water outlet of the pond according to the principle of a circulator, and the low-concentration tail water with higher concentration of soluble pollutants such as ammonia nitrogen, nitrite nitrogen and the like and suspended matters in the middle and lower layers of the culture pond 1 is discharged. When more foam appears on the surface, the valve 43 is closed, the flow of the discharge pipeline is blocked or reduced, the water level in the culture pond 1 rises until the upward opening of the surface water outlet tee 41 is submerged, and the water with more foam or oil film on the surface layer is discharged at a larger flow by utilizing the overflow action of the surface water outlet.

Preferably, the valve 43 is a vertical insertion plate structure arranged on the tail water discharge pipeline, and has the advantages of simple structure, low manufacturing cost and easy operation. Of course, the valve 43 may also be a solenoid valve, which facilitates automatic control.

Further, the inlet of the tail water discharge pipeline 44 is arranged at the position of 5-20 cm away from the mesh partition plate on the conical axis at the bottom.

Further, in the sewage discharge system 5, a sewage discharge pipeline 55 is installed at the conical top of the conical bottom of the culture pond 1 and is sequentially connected with a sewage collection well 51 and a solid-liquid separation pond 52, solid matters are conveyed to a solarization tank 54 through a pipeline by a sewage suction pump 59 at the bottom of the solid-liquid separation pond 52 and can be used as organic fertilizers after being dried in the sun, and supernatant on the upper part of the solid-liquid separation pond 52 enters a tail water treater 53 and is discharged into the outer pond 6 after being treated by the tail water treater 53.

Furthermore, the sewage discharge pipeline 55 is provided with a valve 56 and is connected to a tee joint 57 in the sewage collecting well 51, the two through-holes of the tee joint 57 are vertically arranged in the sewage collecting well 51, a hanging ball is arranged in the tee joint and is connected to a vertical motor, and sewage discharge of the sewage discharge pipeline can be controlled.

Further, a sewage pump 58 is arranged in the sewage collecting well 51, and a pipeline connecting the sewage collecting well 51 and the solid-liquid separation tank 52 is connected to the sewage pump 58.

Further, a filter bag filled with a brush is arranged in the tail water processor 53, and a fluidized microorganism processor is arranged behind the filter bag.

Furthermore, micropore aeration pipes are uniformly arranged at the bottom of the tail water treatment device 53 and connected with an air blower to carry out concentrated aerobic degradation on the water body.

Further, the outer pond 6 comprises a solid-liquid separation pond 61, a microorganism solidification treatment pond 62, a concentrated treatment pond 63 for aquatic plants and algae, and an oxidation pond 64, and tail water passes through the ponds in sequence to complete the deep purification treatment of the tail water.

Preferably, the solid-liquid separation pond 61 adopts a civil second-stage sedimentation zone; the microorganism curing pond 62 is provided with a suspension brush or a cotton fly for attached culture of microorganisms; the number of the aquatic plant and algae centralized processing ponds 63 is two, and the two ponds are arranged in series; the oxidation pond 64 plays a role in deep purification and buffering, and fish, mussels, submerged plants and emergent aquatic plants are bred.

Preferably, 80-200 spotted silver carps, 10-100 silver carps and 2 hyriopsis cumingii (scallops can be put in seawater) can be put in each mu of the oxidation pond 64, 10-20 submerged plants and 5-15 emergent plants are planted in each square meter.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an embedded circular pond recirculating aquaculture system of land-based which characterized in that: the system comprises a culture pond (1), a water inlet system (2), a tail water discharge system (4), a sewage discharge treatment system (5) and an outer pond (6), wherein the tail water discharge system (4) comprises a tail water discharge pipeline (44) and a drainage ditch (42), an inlet of the tail water discharge pipeline (44) is arranged in the culture pond (1), and the drainage ditch (42) is connected with the outer pond (6); the sewage discharge treatment system (5) comprises a sewage discharge pipeline (55), a sewage collecting well (51), a solid-liquid separation tank (52), a solarization tank (54) and a tail water treater (53), wherein the tail water treater (53) is connected with the outer pond (6) through a pipeline; the outer pond (6) is provided with a pipeline (7) connected with the water inlet system (2), and the water inlet system (2) is provided with a water inlet pipeline (25) connected with the culture pond (1).

2. The embedded land-based circular pond recirculating aquaculture system of claim 1, wherein: the culture pond (1) is cylindrical, the bottom of the culture pond is conical, and a mesh partition plate (3) is arranged above the conical top of the conical bottom.

3. The embedded land-based circular pond recirculating aquaculture system of claim 1, wherein: water inlet system (2) is equipped with oxygen-increasing machine (22) including inlet channel (25), water distributor (23) on inlet channel (25), and water distributor (23) are connected on inlet channel (25), and water distributor (23) are located the middle and upper strata of breeding pond (1) along breeding the vertical setting of pond wall, are equipped with on water distributor (23) and are that the orientation is the water distribution mouth (24) that the tangential is on a parallel with the pond wall.

4. The embedded land-based circular pond recirculating aquaculture system of claim 2, wherein: an ultraviolet sterilizer (21) is arranged on the water inlet pipeline (25).

5. The embedded land-based circular pond recirculating aquaculture system of claim 1, wherein: tail water discharge system (4), tail water discharge pipe way (44) are arranged along the lateral wall in cylindrical pond, downwardly extending to and conical bottom combination department slant center extend to central axis department, upwards extend to and normally establish water level height department and change the level and arrange, are equipped with valve (43) and tee bend (41) at the horizontal segment, and one of tee bend (41) leads to the opening and upwards sets up, and two-way connection is on the pipeline in addition, the horizontal segment extends to breed pond (1) and extends to escape canal (42) downwards.

6. The embedded land-based circular pond recirculating aquaculture system of claim 5, wherein: the water inlet of the tail water discharge pipeline (44) is positioned at the position of the conical axis at the bottom and 5-20 cm away from the mesh partition plate.

7. The embedded land-based circular pond recirculating aquaculture system of claim 1, wherein: the sewage discharge system (5) is characterized in that a sewage discharge pipeline (55) is arranged at the conical top of the conical bottom of the culture pond (1) and is sequentially connected with a sewage collection well (51) and a solid-liquid separation pond (52), a sewage suction pump (59) at the bottom of the solid-liquid separation pond (52) conveys solid matters to a solarization pond (54) through a pipeline, and supernatant on the upper part of the solid-liquid separation pond (52) enters a tail water processor (53).

8. The embedded land-based circular pond recirculating aquaculture system of claim 7, wherein: the sewage discharge pipeline (55) is provided with a valve (56) and is connected to a tee joint (57) in the sewage collection well (51), the two through-holes of the tee joint (57) are vertically arranged in the sewage collection well (51), and a hanging ball is arranged in the tee joint and is connected to the vertical motor.

9. The embedded land-based circular pond recirculating aquaculture system of claim 7, wherein: a sewage pump (58) is arranged in the sewage collecting well (51), and a pipeline connecting the sewage collecting well (51) and the solid-liquid separation tank (52) is connected to the sewage pump (58).

10. The embedded land-based circular pond recirculating aquaculture system of claim 1, wherein: the outer pond (6) comprises a solid-liquid separation pond (61), a microorganism curing treatment pond (62), a centralized treatment pond (63) for aquatic plants and algae and an oxidation pond (64), and tail water sequentially passes through the ponds.