CN111802309B - An embedded land-based circular pool circulating water aquaculture system - Google Patents

Abstract

An embedded land-based circular pool circulating water aquaculture system includes a breeding pond, a water inlet system, a tailwater discharge system, a sewage discharge treatment system, and an outer pond. The tailwater discharge system includes a tailwater discharge pipe and a drainage ditch. The tailwater discharge pipe entrance is in the breeding pond, and the drainage ditch is connected to the outer pond; the sewage discharge treatment system includes a sewage discharge pipe, a sewage collection well, a solid-liquid separation tank, a manure drying tank, and a tailwater treatment device. The tailwater treatment device is connected to the outer pond; and the outer pond is connected to the water inlet system. The oxygen content of the breeding pond water can be kept at a dissolved oxygen concentration suitable for fish growth. By discharging sewage and tailwater separately, the feces and residual bait in the breeding pond water body are collected through the hydraulic centrifugal action of the quiet micro-flow state, the sewage discharge can be reduced, the number of supporting sewage treatment system construction can be reduced, and the construction cost and operation cost of the sewage treatment system can be reduced. The treated sewage will be deeply purified together with the tailwater and then returned to the breeding pond for recycling, thereby improving the utilization rate of water resources.

Description

Embedded land-based circular pond circulating water culture system

Technical Field

The present invention relates to an aquaculture apparatus, in particular a land-based aquaculture pond system.

Background

With the rapid development of Chinese economy, the living standard of people is continuously improved, fish serving as high-quality protein food is increasingly popular with people, the demand is increased, and the fish culture is rapidly developed. Although the fish culture in the net cage can greatly improve the fish yield per unit water surface, fish excrement and residual baits are directly discharged into the water body of rivers and lakes, so that the water body is polluted, and the production is strictly limited. The construction of a circulating water culture pond is a great trend of aquaculture, fishes grow rapidly and healthily, good water quality environments are not kept, the yield of unit water surface is required to be improved, the culture density is required to be improved, the improvement of the culture density firstly ensures that the water body has sufficient oxygen content, and the metabolites of the fishes are continuously discharged into the water, so that the water quality is reduced, if the metabolites are not discharged in time, the normal growth of the fishes is influenced, and even the death of the fishes is caused. The existing culture pond is mainly provided with aeration pipes in the culture pond, aeration is performed by using a blower, the oxygen utilization rate is low, the oxygenation effect is poor, the water body of the culture pond is stirred, the phenomenon of violent rolling of boiled water culture is caused, and the sedimentation of fish manure residual baits is not facilitated. The existing circulating water culture pond is mainly used for discharging the waste residue baits in the culture pond by utilizing the gravity effect, the low-pollution tail water is discharged mainly in the modes of discharging the waste residue baits in the culture pond, such as discharging the waste residue baits at the bottom, discharging the waste residue baits at the surface, discharging the waste residue baits at the side and the like, the waste residue baits in the culture pond can not be rapidly discharged, the culture is influenced, and some systems are used for synchronously discharging and discharging the waste residue water, so that the water quality is ensured, the water inflow is often increased, 1 hour is needed for exchanging for 1 time, a huge sewage treatment system is needed to be matched, the construction cost and the operation cost are high, the water consumption is large, the water resource utilization rate is low, and the sewage treatment effect is poor.

Disclosure of Invention

The invention aims to provide an embedded land-based circular pond circulating water culture system, which is characterized in that the oxygen content of water quality of a culture pond is kept at the dissolved oxygen concentration suitable for fish growth by improving the dissolved oxygen concentration of water inlet, excrement residue baits in the water body of the culture pond are gathered by the hydraulic centrifugation of a quiet microfluid state in a mode of separately discharging sewage and tail water, the sewage discharge amount is reduced, the construction number of matched sewage treatment systems can be reduced, the construction cost and the operation cost of the sewage treatment systems are reduced, the sewage treatment is deepened, the treated sewage and the tail water are deeply purified and then returned to culture for recycling, and the water resource utilization rate is improved.

The embedded land-based circular pond circulating water culture system comprises a culture 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 culture pond, 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 pond, a septic tank and a tail water processor, the tail water processor is connected with the outer pond through a pipeline, the outer pond is connected with the water inlet system through a pipeline, and the water inlet system is connected with the culture pond through a water inlet pipeline.

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

Further, 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 at the middle and upper layers of the culture pond, and the water distribution pipe is provided with a water distribution port which is oriented tangentially and parallel to the wall of the pond.

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

Further, the tail water discharge system is characterized in that the tail water discharge pipeline is arranged along the side wall of the cylindrical pond, the tail water discharge pipeline extends downwards to the joint of the tail water discharge pipeline and the conical bottom, the inclined center of the tail water discharge pipeline extends to the central axis, the tail water discharge pipeline extends upwards to the position of the constant water level and is horizontally arranged, a valve and a tee joint are arranged on the horizontal section, one through opening of the tee joint is upwards arranged, the other two through openings of the tee joint are connected to the tail water discharge pipeline, and the horizontal section extends out of the culture pond and then extends downwards to the drainage ditch.

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

Further, the sewage discharge treatment system is characterized in that a sewage discharge pipeline is arranged at the cone top of the conical bottom of the culture pond and sequentially connected with a sewage collecting well and a solid-liquid separation pond, and a sewage suction pump at the bottom of the solid-liquid separation pond conveys solid matters to a septic tank through a pipeline, and supernatant liquid at the upper part of the solid-liquid separation pond enters a tail water processor.

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

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

Further, the outer pond comprises a solid-liquid separation pond, a microorganism solidification treatment pond, an aquatic plant and algae centralized treatment pond 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, gathers the fecal residual baits in the water body of the culture pond by the way of separately discharging sewage and tail water and by the hydraulic centrifugation of quiet microfluidics, reduces the sewage discharge amount, can reduce the construction number of matched sewage treatment systems, lowers the construction cost and the operation cost of the sewage treatment systems, deepens the sewage treatment, and returns the treated sewage to the culture pond for recycling after being deeply purified with the tail water, thereby improving the water resource utilization rate.

Drawings

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

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

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

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

In the figure, the device comprises a 1-culture pond, a 2-water inlet system, a 3-mesh baffle, a 4-tail water discharge system, a 5-sewage discharge treatment system, a 6-external pond, a 7-pipeline, a 21-ultraviolet sterilizer, a 22-aerator, a 23-water distribution pipe, a 24-water distribution port, a 25-water inlet pipeline, a 26-water inlet channel, a 41-tee joint, a 42-drainage channel, a 43-valve, a 44-tail water discharge pipeline, a 51-sewage collecting well, a 52-solid-liquid separation pond, a 53-tail water processor, a 54-septic tank, a 55-sewage discharge pipeline, a 56-valve, a 57-tee joint, a 58-sewage pump, a 59-sewage suction pump, a 61-solid-liquid separation pond, a 62-microorganism solidification treatment pond, a 63-aquatic plant concentrated treatment pond and a 64-oxidation pond.

Detailed Description

The sewage of the culture pond provided by the invention is a water body which contains a large amount of fish feces residual baits and is seriously polluted and is different from tail water of the culture pond. The tail water refers to a water body with more soluble pollutants such as ammonia nitrogen, nitrite nitrogen and the like and more surface foam oil films, 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 will be further described in detail with reference to the accompanying drawings.

As shown in figures 1-4, the embedded land-based circular pond circulating water culture 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, the tail water discharge pipeline 44 is arranged in the culture pond 1, 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 pond 52, a septic tank 54 and a tail water treatment device 53, the tail water treatment device 53 is connected with the outer pond 6 through pipelines, the outer pond 6 is connected with the water inlet system 2 through a pipeline 7, and the water inlet system 2 is connected with the culture pond 1 through a water inlet pipeline 25.

Further, the culture pond 1 is cylindrical, the bottom is conical, and a mesh baffle plate 3 is arranged above the conical top of the conical bottom. The bottom cone bottom of the culture pond 1 and the mesh partition plate 3 form a static dirt collecting area, the settled fish manure residual baits are collected inside, and meanwhile, the influence of the stirring of fish and water flow on the settlement is prevented.

Further, the water inlet system 2 comprises a water inlet pipeline 25 and a water distribution pipe 23, wherein the water inlet pipeline 25 is provided with an aerator 22, the water distribution pipe 23 is connected to the water inlet pipeline 25, the water distribution pipe 23 is vertically arranged along the wall of the culture pond and positioned at the middle and upper layers of the culture pond 1, and the water distribution pipe 23 is provided with a water distribution port 24 which is oriented tangentially and parallel to the wall of the pond. The aerator 22 improves the water inflow dissolved oxygen amount, so that the dissolved oxygen amount in the culture pond 1 is kept at a concentration suitable for fish growth, the conventional way of arranging an aeration pipe and a fan in the culture pond for air oxygenation is replaced, the adverse effect of fan noise on fish growth is avoided, a quiet culture environment is created, the sedimentation of fish manure residual baits and the rapid growth of fish are facilitated, the tangential water distribution port 24 is used for uniformly distributing water and simultaneously producing micro-flowing water, and the fish manure residual baits in the pond are driven to spirally rotate and concentrate towards the bottom.

Further, an ultraviolet sterilizer 21 is arranged on the water inlet pipeline 25 to kill insects and sterilize the inlet water. The outer pond 6 is conveyed to a water inlet channel 26 through a pipeline 7, the water inlet channel is provided with a filtering dam, particulate matters, algae and turbidity are trapped, the transparency and cleanliness of the water body are improved, and then the water is pumped into the water inlet channel by a water inlet pump.

Preferably, the filtering dam is trapezoid, has the height of 1m, the upper width of 2m and the bottom width of 5m. The filtering dam is composed of multiple layers of different materials, and comprises thick gravels, thick volcanic rocks, thick activated carbon, thick fine sand and thick soil from bottom to top, and water purifying plants are planted on the upper part.

Further, in the tail water discharge system 4, a tail water discharge pipeline 44 is arranged along the side wall of the cylindrical pond, extends downwards to the joint with the conical bottom and extends obliquely to the center to the central axis, extends upwards to the position of the constant water level to be horizontally arranged, a valve 43 and a tee joint 41 are arranged at the horizontal section, one opening of the tee joint 41 is upwards arranged, the other two openings of the tee joint 41 are connected to the tail water discharge pipeline 44, and the horizontal section extends downwards to a drainage ditch 42 after extending out of the culture pond 1. The upward opening of the tee 41 is used as a drainage port of the surface drainage path, and the opening is communicated with air, so that the occurrence of accidents of siphon pumping of the water in the culture pond is prevented.

The valve 43 is in a communication state at ordinary times, the middle water outlet, namely the water outlet of the tail water discharge pipeline 44 in the pond continuously discharges the water body at the middle and lower layers according to the principle of a circulator, and discharges low-concentration tail water with higher concentration of ammonia nitrogen, nitrite nitrogen soluble pollutants and suspended matters in the lower layers in the culture pond 1. When more foam appears on the surface, the valve 43 is closed, the flow of the tail water discharge pipeline 44 is blocked or reduced, the water level in the culture pond 1 is increased until the surface water outlet, namely the upward opening of the tee 41, is submerged, and the overflow function of the surface water outlet is utilized to discharge the water with more foam or oil film on the surface with larger flow.

Preferably, the valve 43 is a vertical plugboard structure arranged on the tail water discharge pipeline, and has simple structure, low manufacturing cost and easy operation. Of course, the valve 43 may be a solenoid valve, so as to realize automatic control.

Further, the tail water discharge pipe 44 is water-inlet at a height of 5-20 cm from the mesh partition plate at the bottom cone axis.

Further, in the sewage discharge treatment system 5, a sewage discharge pipeline 55 is arranged at the cone top of the conical bottom of the culture pond 1, and is sequentially connected with a sewage collecting 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 septic tank 54 through a pipeline, the solid matters can be used as organic fertilizers after being dried in the sun, and supernatant liquid at the upper part of the solid-liquid separation pond 52 enters a tail water processor 53 and is discharged into an external pond 6 after being treated by the tail water processor 53.

Further, the sewage discharge pipeline 55 is provided with a valve 56 and is connected with a tee joint 57 in the sewage collecting well 51, two through ends of the tee joint 57 are vertically arranged in the sewage collecting well 51, a hanging ball is arranged in the tee joint, and the hanging ball is connected with a vertical motor to control sewage discharge of the sewage discharge pipeline.

Further, a sewage pump 58 is provided in the sewage collecting well 51, and a pipe 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 and is provided with a bio-plastic filler.

Further, microporous aeration pipes are uniformly arranged at the bottom of the tail water processor 53 and are connected with a blower to perform 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, an aquatic plant and algae centralized treatment pond 63 and an oxidation pond 64, and tail water sequentially passes through the ponds to finish the deep purification treatment of the tail water.

Preferably, the solid-liquid separation pond 61 adopts a civil engineering secondary sedimentation area, the microorganism solidification treatment pond 62 is provided with hanging brushes or tencel attached culture microorganisms, two aquatic plants and algae centralized treatment ponds 63 are arranged in series, the oxidation pond 64 plays a role in deep purification and buffering, and fish, freshwater mussel, submerged plants and emergent aquatic plants are bred.

Preferably, in the oxidation pond 64, 80-200 spotted silver carps, 10-100 silver carps, 2 hyriopsis cumingii (scallops can be placed in sea water) can be bred per mu, and 10-20 submerged plants and 5-15 emergent aquatic plants can be planted per square meter.

Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (7)

1. An embedded land-based circular pond circulating water aquaculture system, characterized in that it comprises a culture pond (1), a water inlet system (2), a tailwater discharge system (4), a sewage discharge treatment system (5), and an outer pond (6), wherein the tailwater discharge system (4) comprises a tailwater discharge pipe (44) and a drainage ditch (42), wherein the inlet of the tailwater discharge pipe (44) is in the culture pond (1), and the drainage ditch (42) is connected to the outer pond (6); the sewage discharge treatment system (5) comprises a sewage discharge pipe (55), a sewage collection well (51), a solid-liquid separation tank (52), a manure drying tank (54), and a tailwater treatment device (53), wherein the tailwater treatment device (53) has a pipe connected to the outer pond (6); the outer pond (6) has a pipe (7) connected to the water inlet system (2), and the water inlet system (2) has a water inlet pipe (25) connected to the culture pond (1); 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 located at the middle and upper layers of the culture pond (1), and the water distribution pipe (23) is provided with a water distribution port (24) oriented tangentially and parallel to the pond wall; The sewage discharge treatment system (5) comprises a sewage discharge pipe (55) installed at the top of the conical bottom of the culture pond (1), and connected in sequence to a sewage collection well (51) and a solid-liquid separation tank (52). A sewage suction pump (59) at the bottom of the solid-liquid separation tank (52) transports solids to a manure drying tank (54) through a pipe, and supernatant at the top of the solid-liquid separation tank (52) enters a tail water treatment device (53). Microporous aeration pipes are evenly arranged at the bottom of the tail water treatment device (53), and the micro-aeration pipes are connected to a blower. The tailwater discharge system (4) is arranged along the side wall of the cylindrical pool, extending downward to the junction with the conical bottom, extending obliquely toward the center to the center axis, extending upward to the permanent water level height, and then being arranged horizontally. A valve (43) and a tee (41) are provided in the horizontal section, one of the tee openings (41) is arranged upward, and the other two openings are connected to the tailwater discharge pipe (44). The horizontal section extends out of the culture pool (1) and then extends downward to the drainage ditch (42); The valve (43) is normally in a connected state, and the middle drainage outlet, i.e., the drainage outlet of the tailwater drainage pipe (44) in the pool continuously discharges the water in the middle and lower layers according to the flow-through principle, and discharges the low-concentration tailwater with high concentrations of ammonia nitrogen, nitrite nitrogen dissolved pollutants, and suspended solids in the middle and lower layers of the aquaculture pond (1); when a lot of foam appears on the surface, the valve (43) is closed to block or reduce the flow of the tailwater drainage pipe (44), so that the water level in the aquaculture pond (1) rises until it submerges the surface drainage outlet, i.e., the upward opening of the tee (41), and the water with a lot of foam or oil film on the surface is discharged at a larger flow rate by utilizing the overflow effect of the surface drainage outlet. 2. The embedded land-based circular pond circulating aquaculture system according to claim 1, characterized in that: the aquaculture pond (1) is cylindrical, with a conical bottom, and a mesh partition (3) is arranged above the top of the conical bottom. 3. The embedded land-based circular pond circulating aquaculture system according to claim 2, characterized in that: an ultraviolet sterilizer (21) is provided on the water inlet pipe (25). 4. The embedded land-based circular pond circulating aquaculture system according to claim 2, characterized in that the water inlet of the tailwater discharge pipe (44) is at a height of 5-20 cm from the mesh partition plate to the conical axis at the bottom of the aquaculture pond (1). 5. The embedded land-based circular pond circulating aquaculture system according to claim 1 is characterized in that: a valve (56) is provided on the sewage discharge pipe (55), and is connected to a tee (57) in the sewage collecting well (51), two through-ports of the tee (57) are vertically arranged in the sewage collecting well (51), a hanging ball is arranged in the tee, and the hanging ball is connected to a vertical motor. 6. The embedded land-based circular pond circulating aquaculture system according to claim 5, characterized in that a sewage pump (58) is provided 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). 7. The embedded land-based circular pond circulating aquaculture system according to claim 1 is characterized in that: the outer pond (6) includes a solid-liquid separation pond (61), a microbial solidification treatment pond (62), an aquatic plant and algae centralized treatment pond (63), and an oxidation pond (64), and the tail water passes through the above ponds in sequence.