CN111802309A - An embedded land-based circular pond recirculating aquaculture system - Google Patents

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

An embedded land-based circular pond recirculating aquaculture system

technical field

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

Background technique

With the rapid development of my country's economy and the continuous improvement of people's living standards, fish has become more and more popular as a high-quality protein food, and the demand is increasing, and fish farming has developed rapidly. Although fish culture in cages can greatly increase the output of fish per unit water surface, fish excrement and residual bait are directly discharged into the water bodies of rivers and lakes, causing pollution to the water bodies, and production has been strictly restricted. The construction of circulating water aquaculture ponds is a major trend in aquaculture. To make fish grow fast and healthy, it is inseparable from a good water quality environment. To increase the output per unit water surface, it is necessary to increase the breeding density, and the increase of the breeding density, first of all To ensure that there is sufficient oxygen content in the water body, the metabolites of fish are continuously discharged into the water, which will reduce the water quality. If it is not discharged in time, it will affect the normal growth of fish and even lead to the death of fish. In the current aquaculture ponds, the aeration pipes are mainly arranged in the breeding ponds, and the aeration is carried out with a blower. The oxygen utilization rate is low, the oxygenation effect is poor, and the water body of the aquaculture pond is stirred, causing the violent tumbling phenomenon of boiling water aquaculture, which is not conducive to fish manure. The bait settles. Most of the current circulating water aquaculture ponds use gravity for bottom discharge, which cannot effectively discharge the feces and bait in the aquaculture pond. The discharge of low-pollution tail water mainly adopts bottom discharge, surface discharge, side discharge, etc., which cannot be quickly discharged. Ammonia nitrogen, nitrite nitrogen, suspended solids, foam oil film, etc. in aquaculture ponds affect aquaculture. In some systems, tail water discharge and sewage discharge are carried out simultaneously. In order to ensure water quality, it is often necessary to increase the amount of water inflow. , need to support a huge sewage treatment system, high construction cost and operation cost, large water consumption, low utilization rate of water resources, poor sewage treatment effect.

SUMMARY OF THE INVENTION

The invention aims to provide an embedded land-based circular pond circulating water aquaculture system. By increasing the dissolved oxygen concentration of the influent water, the oxygen content of the water quality of the breeding pond is maintained at the dissolved oxygen concentration suitable for the growth of fish, and the sewage and tail water are discharged separately. Through the quiet microfluidic hydraulic centrifugal action, the fecal residues in the water body of the aquaculture pond can be collected, reducing the amount of sewage discharge, which can reduce the number of supporting sewage treatment systems, reduce the construction cost and operating cost of the sewage treatment system, and deepen the sewage treatment. , the treated sewage will be deeply purified with the tail water and returned to aquaculture for recycling to improve the utilization rate of water resources.

An embedded land-based circular pond circulating water aquaculture system includes a culture pond, a water inlet system, a tail water discharge system, a sewage discharge treatment system, and an outer pond. The tail water discharge system includes a tail water discharge pipe, a drainage ditch, and a tail water discharge pipe. The 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 pipeline, a sewage collection well, a solid-liquid separation tank, a manure drying tank, and a tail water processor, and the tail water processor is connected to the outer pond by a pipeline; The pond has pipes connected to the water inlet system, and the water inlet system has water inlet pipes connected to the breeding pond.

Further, the cultivating pond is cylindrical, the bottom is conical, and the top of the conical bottom is provided with a mesh baffle.

Further, the water inlet system includes a water inlet pipe and a water distribution pipe, the water inlet pipe is provided with an aerator, the water distribution pipe is connected to the water inlet pipe, and the water distribution pipe is vertically arranged along the wall of the culturing pond and is located at the end of the culturing pond. In the middle and upper layers, the water distribution pipes are provided with water distribution ports oriented tangentially parallel to the pool wall.

Further, an ultraviolet sterilizer is provided on the water inlet pipe.

Further, in the tail water discharge system, the tail water discharge pipe is arranged along the side wall of the cylindrical tank, extending downward to the junction with the conical bottom, extending obliquely from the center to the center axis, and extending upward to the height of the standing water level. Horizontal arrangement, a valve and a tee are arranged in the horizontal section, one of the tee openings is set upward, and the other two are connected to the pipeline, and the horizontal section extends out of the breeding pond and then extends down to the drainage ditch.

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

Further, in the sewage discharge system, the sewage discharge pipeline is installed at the top of the cone at the conical bottom of the cultivating pond, connecting the sewage collecting well and the solid-liquid separation pond in turn, and the sewage suction pump at the bottom of the solid-liquid separation pond transports the solid through the pipeline. To the manure drying tank, the supernatant in the upper part of the solid-liquid separation tank enters the tail water processor.

Further, the sewage discharge pipeline is provided with a valve, which is connected to the tee in the sewage collection well, the two connecting links of the tee are vertically arranged in the sewage collection well, the tee is provided with a hanging ball, and the hanging ball is connected vertically. on the motor.

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

Further, the outer pond includes a solid-liquid separation pond, a microbial solidification treatment pond, a centralized treatment pond for aquatic plants and algae, and an oxidation pond, and the tail water passes through the above-mentioned ponds in sequence.

The invention can keep the oxygen content of the water quality of the breeding pond at the dissolved oxygen concentration suitable for the growth of fish, and collect the fecal residues in the water body of the breeding pond by the way of separate discharge of sewage and tail water, and the hydraulic centrifugal action of quiet microfluidic state. Reducing the amount of sewage discharge can reduce the number of supporting sewage treatment systems, reduce the construction and operating costs of sewage treatment systems, and deepen sewage treatment. utilization.

Description of drawings

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

Fig. 2 is the schematic diagram of the water inlet system of the present invention;

Fig. 3 is the schematic diagram of tail water discharge system of the present invention;

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

In the picture: 1-Cultivation pond, 2-Water inlet system, 3-Mesh separator, 4-Tail water discharge system, 5-Sewage discharge system, 6-Outer pond, 7-Pipeline, 21-Ultraviolet sterilizer, 22 -Aerator, 23- water distribution pipe, 24- water distribution port, 25- water inlet pipe, 26- water inlet ditch, 41- tee, 42- drain ditch, 43- valve, 44- tail water discharge pipe, 51- Sewage collection well, 52-solid-liquid separation tank, 53-tail water processor, 54-septic tank, 55-sewage discharge pipeline, 56-valve, 57-tee, 58-sewage pump, 59-suction pump, 61 -Solid-liquid separation pond, 62-Microbial solidification treatment pond, 63-Aquatic plants and algae centralized treatment pond, 64-Oxidation pond.

Detailed ways

The culturing pond sewage in the present invention refers to a water body that contains a large amount of fish feces residues and is seriously polluted, which is different from the tail water of the culturing pond. Tail water refers to the water body containing ammonia nitrogen, nitrite nitrogen and other soluble pollutants and surface foam oil film, and the pollution degree is relatively light.

In order to make the objectives, technical solutions and advantages of the invention more clear, the invention will be further described in detail below with reference to the accompanying drawings.

As shown in Figures 1-4, an embedded land-based circular pond circulating water aquaculture system includes aquaculture pond 1, water inlet system 2, tail water discharge system 4, sewage discharge treatment system 5, outer pond 6, tail water discharge system 4 includes a tail water discharge pipe 44 and a drainage ditch 42. The entrance of the tail water discharge pipe 44 is in the breeding pond 1, and the drainage ditch 42 is connected to the outer pond 6; Separation tank 52, manure drying tank 54, tail water processor 53, tail water processor 53 has pipes connected to outer pond 6; outer pond 6 has pipes 7 connected to water inlet system 2, and water inlet system 2 has water inlet pipes 25 connected to aquaculture Pool 1.

Further, the cultivation pond 1 is cylindrical, the bottom is conical, and the top of the conical bottom is provided with a mesh partition 3 . The bottom cone bottom of the breeding pond 1 and the mesh partition 3 form a static sewage collection area, which collects the settled fish manure and bait, and prevents the fish and water flow from stirring and affecting the deposition.

Further, the water inlet system 2 includes a water inlet pipe 25 and a water distribution pipe 23. The water inlet pipe 25 is provided with an aerator 22, and the water distribution pipe 23 is connected to the water inlet pipe 25. The water distribution pipe 23 is provided with a water distribution port 24 oriented tangentially parallel to the pool wall. The aerator 22 increases the amount of dissolved oxygen in the influent water, so that the dissolved oxygen in the breeding pond 1 is maintained at a concentration suitable for fish growth, which replaces the current method of arranging aeration pipes and fans for air supply in the breeding pond, and avoids fan noise. It has an adverse effect on the growth of fish, creates a quiet breeding environment, is conducive to the settlement of fish manure residues and the rapid growth of fish, and the tangential water distribution port 24 creates a swirl state of micro-flow water while distributing water evenly, which drives the fish in the pool. The dung bait spirals and accumulates at the bottom.

Further, there is an ultraviolet sterilizer 21 on the water inlet pipe 25 to kill insects and sterilize the water inlet. The outer pond 6 is transported to the inlet ditch 26 through the pipeline 7, and the inlet ditch is provided with a filter dam to intercept particulate matter, algae and turbidity, improve the transparency and cleanliness of the water body, and then use the inlet pump to pump the water into the inlet pipeline.

Preferably, the filter dam is trapezoidal, with a height of 1m, an upper width of 2m, and a bottom width of 5m. The filter dam is composed of multiple layers of different materials, from bottom to top, thick gravel, thick volcanic rock, thick activated carbon, thick fine sand, thick soil, and water purification plants are planted on the upper part.

Further, in the tail water discharge system 4, the tail water discharge pipe 44 is arranged along the side wall of the cylindrical tank, extending downward to the junction with the conical bottom, extending obliquely from the center to the central axis, and extending upward to the height of the standing water level. Horizontal arrangement, a valve 43 and a three-way 41 are arranged in the horizontal section, one of the three-way 41 openings is set upward, and the other two are connected to the pipeline. The upward opening of the tee 41 is used as a surface discharge path drainage port, and at the same time, the opening communicates with the air, so as to prevent the occurrence of an accident of siphoning and draining the water in the aquaculture pond.

The valve 43 is in a connected state at ordinary times, and the middle water outlet is the water outlet of the tail water discharge pipe 44 in the pond to continuously discharge the water body in the middle and lower layers according to the principle of the flow device, and discharge the ammonia nitrogen, nitrite nitrogen, etc. in the middle and lower layers of the culture pond 1 to dissolve. Low-concentration tail water with high concentrations of sexual pollutants and suspended solids. When there is a lot of foam on the surface, close the valve 43 to block or reduce the flow of the discharge pipeline, so that the water level in the culture pond 1 rises until the surface drain is submerged, the upward opening of the tee 41, and the overflow effect of the surface drain is used. The water body with a lot of surface foam or oil film is discharged with a larger flow rate.

Preferably, the valve 43 is a vertical plate structure arranged on the tail water discharge pipeline, which is simple in structure and low in manufacturing cost and easy to operate. Of course, the valve 43 can also be a solenoid valve to facilitate automatic control.

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

Further, the sewage discharge system 5, the sewage discharge pipeline 55 is installed at the top of the cone at the conical bottom of the cultivating pond 1, and is connected to the sewage collection well 51 and the solid-liquid separation pool 52 in turn, and the sewage suction pump 59 at the bottom of the solid-liquid separation pool 52 will The solids are transported to the manure drying tank 54 through the pipeline, and can be used as organic fertilizer after drying.

Further, there is a valve 56 on the sewage discharge pipeline 55, and is connected to the tee 57 in the sewage collection well 51. The two-way through the tee 57 is vertically arranged in the sewage collection well 51, and a hanging ball is arranged in the tee. , The hanging ball is connected to the vertical motor, which can control the sewage discharge of the sewage discharge pipeline.

Further, a sewage pump 58 is arranged in the sewage collecting well 51 , and the 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 brushes is arranged in the tail water processor 53, and a fluidized microbial processor is arranged behind the filter bag, and the fluidized microbial processor is arranged with a bioplastic filler.

Further, the bottom of the tail water processor 53 is evenly arranged with micro-porous aeration pipes, and the micro-aeration aeration pipes are connected to the blower to carry out concentrated aerobic degradation of the water body.

Further, the outer pond 6 includes a solid-liquid separation pond 61, a microbial solidification treatment pond 62, a centralized treatment pond for aquatic plants and algae 63, and an oxidation pond 64.

Preferably, the solid-liquid separation pond 61 adopts a civil secondary sedimentation area; the microorganism solidification treatment pond 62 is provided with hanging brushes or cotton wool to attach and cultivate microorganisms; there are two centralized treatment ponds 63 for aquatic plants and algae, and the two ponds are arranged in series ; Oxidation pond 64 plays the role of deep purification and buffer, stocking with fish, mussels, submerged plants and emergent plants.

Preferably, in the oxidation pond 64, 80-200 silver carp, 10-100 silver carp, 2 spinach mussels (scallops can be placed in seawater) can be stocked per mu, 10-20 submerged plants can be planted per square meter, 5- 15 emergent plants.

Of course, the present invention can also have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformation should belong to the protection scope of the appended claims of the present invention.

Claims (10)

1. an embedded land-based circular pond circulating water culture system, characterized in that: comprising a culture pond (1), a water inlet system (2), a tail water discharge system (4), a sewage discharge treatment system (5), an outer pond (6), the tail water discharge system (4) comprises a tail water discharge pipe (44) and a drainage ditch (42), the entrance of the tail water discharge pipe (44) is in the breeding pond (1), and the drainage ditch (42) is connected to the outer pond (6); The sewage discharge treatment system (5) includes a sewage discharge pipeline (55), a sewage collection well (51), a solid-liquid separation tank (52), a manure drying tank (54), a tail water processor (53), and a tail water processor (53). The water processor (53) has a pipeline connected to the outer pond (6); the outer pond (6) has a pipeline (7) connected to the water inlet system (2), and the water inlet system (2) has a water inlet pipeline (25) connected to the culture pond ( 1). 2. The embedded land-based circular pond circulating aquaculture system according to claim 1, characterized in that: the culturing pond (1) is cylindrical, the bottom is conical, and the top of the conical bottom is provided with mesh holes Separator (3). 3. The embedded land-based circular pond circulating aquaculture system according to claim 1, wherein the water inlet system (2) comprises a water inlet pipe (25), a water distribution pipe (23), and a water inlet pipe (25). 25) is provided with an aerator (22), the water distribution pipe (23) is connected to the water inlet pipe (25), and the water distribution pipe (23) is arranged vertically along the culturing pond wall and is located in the middle and upper layers of the culturing pond (1). The water distribution pipe (23) is provided with a water distribution port (24) whose orientation is tangentially parallel to the pool wall. 4. The embedded land-based circular pond circulating aquaculture system according to claim 2, wherein an ultraviolet sterilizer (21) is provided on the water inlet pipe (25). 5. The embedded land-based circular pond recirculating aquaculture system according to claim 1, characterized in that: in the tail water discharge system (4), the tail water discharge pipe (44) is arranged along the side wall of the cylindrical pond, toward the It extends downward to the junction with the conical bottom, extends obliquely from the center to the central axis, extends upward to the height of the standing water level, and is arranged horizontally. The horizontal section is provided with a valve (43) and a tee (41), and the tee (41) One of the through openings is arranged upward, the other two are connected to the pipeline, and the horizontal section extends out of the culture pond (1) and then extends downward to the drainage ditch (42). 6 . The embedded land-based circular pond recirculating aquaculture system according to claim 5 , wherein the water inlet of the tail water discharge pipe ( 44 ) is at a height of 5-20 cm from the bottom tapered axis to the mesh baffle. 7 . 7. The embedded land-based circular pond circulating aquaculture system according to claim 1, characterized in that: the sewage discharge system (5), the sewage discharge pipe (55) is installed on the cone at the conical bottom of the culturing pond (1). At the top, the sewage collecting well (51) and the solid-liquid separation tank (52) are connected in sequence, and the sewage suction pump (59) at the bottom of the solid-liquid separation tank (52) transports the solids to the manure drying tank (54) through the pipeline, and The supernatant in the upper part of the liquid separation tank (52) enters the tail water processor (53). 8. The embedded land-based circular pond circulating aquaculture system according to claim 7, characterized in that: the sewage discharge pipeline (55) is provided with a valve (56), and is connected to the tee in the sewage collection well (51) On (57), the two through links of the tee (57) are vertically arranged in the sewage collection well (51), and the tee is provided with a lob, which is connected to the vertical motor. 9. The embedded land-based circular pond circulating aquaculture system according to claim 7, characterized in that: a sewage pump (58) is arranged in the sewage collection well (51) to connect the sewage collection well (51) with the solid-liquid The pipes of the separation tank (52) are connected to the sewage pump (58). 10. The embedded land-based circular pond circulating aquaculture system according to claim 1, wherein the outer pond (6) comprises a solid-liquid separation pond (61), a microbial solidification treatment pond (62), aquatic plants and The algae centralized treatment pond (63) and the oxidation pond (64), and the tail water passes through the above-mentioned ponds in turn.

Images