Circulating system for cultivating seaweed for eating of oysters and purifying water quality

Abstract

The utility model discloses a circulation system for cultivating algae for eating of oysters and purifying water, and relates to the technical field of aquaculture, a fish pond, a nitrification pond, an algae pond and an oyster pond are communicated to form a closed loop, so that circulating purification and utilization of salty and fresh water aquaculture sewage are realized, and the aquaculture sewage is fermented by the nitrification pond and then is discharged by the algae pond. According to the present invention, the water flows into the algae pool to provide nutrients for algae culture, the algae enters the oyster pool through the flowing water to serve as the nutrients for the oysters, the culture sewage is subjected to multi-stage purification through the multi-stage algae pool and the multi-stage oyster pool, and the purified water flows back to the fish pool to achieve cyclic utilization, such that the diversity of the culture can be achieved through the culture of the oysters and the algae, biological purification can be carried out on the salty and fresh water aquaculture sewage by means of cultured oysters and algae, and the biological treatment effect of the salty and fresh water aquaculture sewage is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aquaculture, and particularly relates to a circulating system for purifying water quality by cultivating seaweeds for oysters to eat. Background Art

[0002] During the aquaculture process of brackish water aquaculture, the excrement sewage generated needs to go through multiple processes for sewage treatment; among them, biological purification treatment is a way of aquaculture sewage treatment, and biological purification treatment uses the diversity of organisms to purify and recycle aquaculture sewage; however, at present, most of the sewage treatment by biological purification methods uses a single variety of organisms for purification, resulting in low purification efficiency. Based on this, this application proposes a circulating system for purifying water quality by cultivating seaweeds with brackish water aquaculture excrement for oysters to eat. Summary of the Utility Model

[0003] The purpose of the utility model is to propose a circulating system for purifying water quality by cultivating seaweeds for oysters to eat in view of the deficiencies in the above technologies, aiming to solve the existing problems.

[0004] The utility model provides a circulating system for purifying water quality by cultivating seaweeds for oysters to eat, which includes a fish pond, a nitrification pond, an algae pond and an oyster pond. The fish pond is connected to the nitrification pond through a sewage discharge pipe, the nitrification pond is connected to the algae pond through a water inlet pipe, and the oyster pond is connected to the fish pond through a return pipe; an overflow channel is arranged at one end of the algae pond, and an arc-shaped guide plate is arranged on the overflow channel. The algae in the algae pond flows into the oyster pond along with the water flow through the overflow channel; an oxygen supply mechanism for making the water flow in the algae pond flow is arranged at the bottom of the algae pond, and a plurality of hanging rod grooves for hanging oysters are evenly arranged at intervals on the oyster pond. Water pumps are respectively arranged on the sewage discharge pipe and the water inlet pipe.

[0005] Preferably, there are multiple algae ponds, and the multiple algae ponds are distributed in a stepped structure, and the multiple algae ponds overflow through the overflow channel. A recovery channel is arranged at the end of the oyster pond, a filter screen is arranged on the recovery channel, and a drain outlet is also arranged on the recovery channel. The drain outlet is connected to the fish pond through a return pipe.

[0006] Preferably, the oxygen supply mechanism is a plurality of oxygen supply pipes arranged at the bottom of the algae pond. The oxygen supply pipes are communicated with each other, and one of the oxygen supply pipes is connected to an external air pump; a plurality of aeration ports are evenly arranged on the oxygen supply pipes.

[0007] Preferably, the oxygen supply mechanism includes an upper impeller, a lower impeller, a base and an air delivery pipe. The upper impeller is coaxially connected to the lower impeller through a rotating pipe. The rotating pipe is rotatably arranged on the base, so that the lower impeller is located inside the base and the upper impeller is located outside the base; the air delivery pipe is connected to the base, and the air delivery pipe is connected to an external air source; a plurality of rows of air inlets are arranged on the rotating pipe inside the base, and a plurality of air outlets are arranged on the upper impeller.

[0008] Compared with the prior art, the following beneficial effects are achieved:

[0009] By connecting the fish pond, nitrification pond, algae pond and oyster pond to form a closed loop, the circular purification and utilization of brackish water aquaculture sewage are realized. After the aquaculture sewage ferments in the nitrification pond, it flows into the algae pond to provide nutrients for seaweed cultivation. The seaweed enters the oyster pond through the flowing water as nutrients for the oysters. The multi-stage algae pond and oyster pond are relied on to carry out multi-stage purification of the aquaculture sewage, and the purified water is recycled back to the fish pond to achieve circular utilization. Not only can the diversity of aquaculture be realized by cultivating oysters and seaweed, but also the biological purification of brackish water aquaculture sewage can be carried out by relying on the cultivation of oysters and seaweed, effectively improving the biological treatment efficiency of brackish water aquaculture sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only the preferred embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 It is a schematic diagram of the three-dimensional main structure of the present invention;

[0012] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0013] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention;

[0014] Figure 4 It is the present invention Figure 3 A partial enlarged schematic diagram;

[0015] Figure 5 It is the present invention Figure 3 B partial enlarged schematic diagram;

[0016] Figure 6 It is a schematic diagram of the algae pond with a stepped structure distribution of the present invention;

[0017] Figure 7 It is a schematic diagram of the oxygen supply mechanism of the present invention.

[0018] In the figure: 1 - fish pond; 2 - nitrification pond; 3 - algae pond; 4 - oyster pond; 41 - suspension rod groove; 42 - recovery channel; 43 - filter screen; 5 - overflow channel; 6 - arc-shaped guide plate; 7 - oxygen supply mechanism; 71 - upper impeller; 72 - lower impeller; 73 - base; 74 - air delivery pipe; 75 - rotating pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To better understand the structure of the present utility model and the functional features and advantages it can achieve, the following will describe the preferred embodiments of the present utility model in detail in conjunction with the drawings as follows:

[0020] Embodiment:

[0021] As Figures 1 to 6 shown, the present utility model provides a circulating system for cultivating seaweed for oysters to eat and purifying water quality, which includes a fish pond 1, a nitrification pond 2, an algae pond 3 and an oyster pond 4. The fish pond 1 is connected to the nitrification pond 2 through a sewage discharge pipe, the nitrification pond 2 is connected to the algae pond 3 through a water inlet pipe, and the oyster pond 4 is connected to the fish pond 1 through a return pipe; an overflow channel 5 is provided at one end of the algae pond 3, and an arc-shaped guide plate 6 is provided on the overflow channel 5. The algae pond 3 allows the algae in it to flow into the oyster pond 4 with the water flow through the overflow channel 5, and relies on the action of the arc-shaped guide plate 6 to reduce the problem of seaweed accumulating on the overflow channel 5. The height of the algae pond 3 of the present application is such that sunlight can directly reach the bottom, so as to facilitate the photosynthesis of seaweed.

[0022] An oxygen supply mechanism 7 for making the water flow in the algae pond 3 is provided at the bottom of the algae pond 3 to supply oxygen to the algae pond 3 by setting the oxygen supply mechanism 7. The oxygen supply mechanism 7 can not only serve as the driving force of the water flow, enabling the water in the algae pond 3 to flow for photosynthesis, but also, when sunlight is insufficient, serve as a supplementary oxygen supply mechanism for the algae pond 3. A plurality of hanging rod grooves 41 for hanging oysters are evenly spaced on the oyster pond 4 to facilitate placing the hanging rods for cultivating oysters. Water pumps are respectively provided on the sewage discharge pipe and the water inlet pipe to pump the sewage in the nitrification pond 2 into the algae pond 3 through the water pumps. The flowing water in the algae pond 3 drives the seaweed to overflow into the oyster pond 4, and the purified water in the oyster pond 4 flows back to the fish pond 1 through the return pipe.

[0023] Refer to Figure 6 , there are multiple algae ponds 3 in the present application, and the multiple algae ponds 3 are distributed in a stepped structure. The multiple algae ponds 3 overflow through the overflow channel 5, so as to purify the sewage discharged by brackish water aquaculture in multiple stages in the multiple algae ponds 3 in a stepped structure, provide sufficient microalgae for the oysters in the oyster pond 4 to grow, and rely on the oysters in the oyster pond 4 to further purify the water flowing in from the algae pond 3.

[0024] Refer to Figure 5 , a recovery channel 42 is provided at the end of the oyster pond 4 of the present application, and a filter screen 43 is provided on the recovery channel 42 to prevent microalgae from being discharged from the oyster pond 4 through the filter screen 43; a drain port is also provided on the recovery channel 42, and the drain port is connected to the fish pond 1 through a return pipe to facilitate the recycling of the purified water.

[0025] Further, it further includes a purification pond for collecting the purified water flowing out of the oyster pond 4. The purification pond is connected to the fish pond 1 through a return pipe to facilitate the return of the water at the upper end of the purification pond to the fish pond 1. The return in this application can adopt the pumping or step-flow method.

[0026] Further, there can be multiple oyster ponds 4 in this application. The multiple oyster ponds 4 adopt a stepped distribution structure, overflow to the next level through the overflow channel 5, and flow the purified water to the purification pond or the fish pond 1 through the return channel.

[0027] Further, a sludge discharge pump is provided in the nitrification pond 2 of this application, and the sludge in the nitrification pond 2 is discharged through the sludge discharge pipe.

[0028] As another embodiment of this application, as Figure 1 and Figure 2 shown, the oxygen supply mechanism 7 of this application is multiple oxygen supply pipes arranged at the bottom of the algae pond 3. The oxygen supply pipes are interconnected with each other, and one of the oxygen supply pipes is connected to an external air pump; a plurality of aeration ports are evenly arranged on the oxygen supply pipes to make the microalgae underwater flow to the upper part in the form of aeration and overflow to the oyster pond 4 through the overflow channel 5.

[0029] As another embodiment of this application, as Figure 7 shown, the oxygen supply mechanism 7 of this application includes an upper impeller 71, a lower impeller 72, a base 73 and an air delivery pipe 74. The upper impeller 71 is coaxially connected to the lower impeller 72 through a rotating pipe 75. The rotating pipe 75 is rotatably arranged on the base 73 so that the lower impeller 72 is located inside the base 73 and the upper impeller 71 is located outside the base 73; the air delivery pipe 74 is connected to the base 73, and the air delivery pipe 74 is connected to an external air source; multiple rows of air inlet ports are arranged on the rotating pipe 75 located inside the base 73, and a plurality of air outlet ports are arranged on the upper impeller 71. Specifically, the air delivery pipe 74 conveys gas to the inside of the base 73 at a certain gas delivery rate through an air pump to drive the lower impeller 72 to rotate so that the upper impeller 71 rotates synchronously, so as to push the water at the bottom of the algae pond 3 to the upper end, thereby forming a circulating flow. At the same time, the gas drives the lower impeller 72 to rotate to enter the cavity of the base 73 above the lower impeller 72 and enter the upper impeller 71 through multiple rows of air inlet ports, so that the gas is discharged from the air outlet ports of the one-way valve structure of the upper impeller 71.

[0030] Further, the upper impeller 71 can drive the water at the bottom of the algae pond 3 to slowly flow to the upper part through rotation to realize the slow circulating flow of the water in the algae pond 3; further, a control valve is provided in the external air source to facilitate controlling the gas flow rate and pressure in the air delivery pipe 74, thereby controlling the rotation speeds of the upper impeller 71 and the lower impeller 72. Further, the air outlet ports on the upper impeller 71 can be arranged at the end of the middle rotating pipe 75.

[0031] Working principle of this system: The fecal sewage generated in fish pond 1 flows into nitrification pond 2 through the sewage discharge pipe for fermentation, and then is pumped to the uppermost algae pond 3 through the water inlet pipe, and overflows level by level into oyster pond 4 through the stepped algae pond 3. While the sewage is biologically purified in the multi-level algae pond 3, nutrients are provided for the seaweed, enabling the seaweed to grow rapidly, and enter oyster pond 4 through the flowing water as the nourishment for the oysters. At the same time, oyster pond 4 can rely on the oysters as another biochemical purification process to further purify the brackish water aquaculture sewage. Finally, the purified water after multiple purification processes flows back to fish pond 1 through the return channel to achieve the function of step-by-step purification and recycling.

[0032] The above is only the preferred embodiment of the present utility model, and does not impose any form of limitation on the present utility model. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present utility model. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present utility model without departing from the content of the technical solution of the present utility model all fall within the protection scope of this technical solution.

Claims

1. A circulation system for cultivating seaweed for oysters to eat and purifying water, characterized in that: The invention comprises a fish pond (1), a nitrification pond (2), an algae pond (3) and an oyster pond (4), wherein the fish pond (1) is connected to the nitrification pond (2) via a sewage pipe, the nitrification pond (2) is connected to the algae pond (3) via a water inlet pipe, and the oyster pond (4) is connected to the fish pond (1) via a return pipe; an overflow channel (5) is arranged at one end of the algae pond (3), an arc-shaped guide plate (6) is arranged on the overflow channel (5), and the algae in the algae pond (3) flows into the oyster pond (4) along with the water flow through the overflow channel (5); an oxygen supply mechanism (7) for making the water flow in the algae pond (3) flow is arranged at the bottom of the algae pond (3), and a plurality of suspension rod grooves (41) for hanging oysters are evenly spaced and arranged on the oyster pond (4).

2. The circulation system for cultivating seaweed for oyster consumption and purifying water according to claim 1, characterized in that: There are a plurality of algae ponds (3), and the plurality of algae ponds (3) are distributed in a stepped structure, and overflow occurs between the plurality of algae ponds (3) through the overflow channel (5).

3. The circulation system for cultivating seaweed for oyster consumption and purifying water according to claim 2, characterized in that: A recovery channel (42) is provided at the end of the oyster pond (4), a filter screen (43) is provided on the recovery channel (42), and a drainage port is also provided on the recovery channel (42), and the drainage port is connected to the fish pond (1) through the return pipe.

4. The circulation system for cultivating seaweed for oyster consumption and purifying water according to claim 1, characterized in that: The sewage pipe and the water inlet pipe are respectively provided with water pumps.

5. The circulation system for cultivating seaweed for oyster consumption and purifying water according to claim 1, characterized in that: The oxygen supply mechanism (7) is a plurality of oxygen supply pipes arranged at the bottom of the algae pond (3), the oxygen supply pipes are interconnected, and one of the oxygen supply pipes is connected to an external air pump; a plurality of aeration ports are evenly distributed on the oxygen supply pipes.

6. The circulation system for cultivating seaweed for oyster consumption and purifying water according to claim 1, characterized in that: The oxygen supply mechanism (7) comprises an upper impeller (71), a lower impeller (72), a base (73) and an air supply pipe (74); the upper impeller (71) is coaxially connected to the lower impeller (72) via a rotating pipe (75); the rotating pipe (75) is rotatably arranged on the base (73) so that the lower impeller (72) is located inside the base (73) and the upper impeller (71) is located outside the base (73); the air supply pipe (74) is connected to the base (73) and is connected to an external air source; the rotating pipe (75) is located inside the base (73) and is provided with a plurality of rows of air inlets, and the upper impeller (71) is provided with a plurality of air outlets.

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