Ecological discharge system for biological purification of mariculture sewage

Abstract

The utility model discloses an ecological discharge system for biological purification of mariculture sewage, which relates to the technical field of aquaculture seawater tail water treatment and comprises multiple stages of purification ponds distributed in a stepped structure, the purification pond positioned at the upper end is connected with a sewage inlet pipe, the purification pond positioned at the lower end is connected with a water discharge pipe, the sewage inlet pipe is communicated with a dilution pipe, and the dilution pipe is communicated with a water discharge pipe. A floating bed for purifying biological planting is arranged in the purifying pond; and an overflow channel is arranged on one side of the purification tank. Flowing purification is carried out on aquaculture seawater tail water by arranging a multi-stage purification pond of a stepped structure, the aquaculture seawater tail water is desalted through a dilution pipe, and then biological purification is carried out on the aquaculture seawater tail water and halophyte planted on a floating bed in the purification pond, so that the discharged salt content in the aquaculture seawater tail water is reduced; by arranging the multi-stage purification pond and arranging the floating bed in the purification pond to plant halophyte, the aquaculture seawater tail water is subjected to multi-stage purification, the desalination efficiency of the aquaculture seawater tail water is effectively improved, and the discharged salt content of the aquaculture seawater tail water is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of aquaculture seawater tail water treatment, in particular to an ecological discharge system for biological purification of aquaculture sewage in seawater. Background Art

[0002] China's aquaculture industry in seawater ranks first in the world. While the rapid development of the industry has prospered the social economy, it has also brought environmental pollution problems such as water pollutant emissions that cannot be ignored. Aquaculture tail water in seawater has characteristics such as high salinity, complex pollutant components, and poor biodegradability, making it difficult to treat and having high technical requirements. Among them, the biological treatment technology for aquaculture tail water in seawater is considered to be the most potential and environmentally friendly treatment technology that can effectively contribute to carbon emission reduction. However, due to the high salinity of aquaculture tail water in seawater, it is difficult for plants for biological treatment to grow under high salinity, making it vulnerable to influence in biochemical purification treatment. Therefore, this application proposes an ecological discharge system for biological purification of aquaculture sewage in seawater. Summary of the Utility Model

[0003] The purpose of the utility model is to propose an ecological discharge system for biological purification of aquaculture sewage in seawater aiming at the deficiencies in the above technologies, aiming to solve the existing problems.

[0004] The utility model provides an ecological discharge system for biological purification of aquaculture sewage in seawater, including a multi-stage purification pool. The multi-stage purification pool is distributed in a stepped structure. The purification pool at the upper end is connected with a sewage inlet pipe, and the purification pool at the lower end is connected with a drain pipe. A dilution pipe is communicated with the sewage inlet pipe. A floating bed for purifying biological planting is arranged in the purification pool. An overflow channel is arranged on one side of the purification pool. The aquaculture sewage in seawater flows from top to bottom through the overflow channel to each purification pool for multi-stage purification.

[0005] Preferably, a separation net is arranged on the overflow channel; the overflow channel on the purification pool at the lowermost end is of a triangular structure, and the drain pipe is connected thereto. A plurality of planting pots are evenly arranged on the floating bed.

[0006] Preferably, it further includes a circulation pipe. One end of the circulation pipe is communicated with the drain pipe, and the other end of the circulation pipe is communicated with the dilution pipe. A three-way valve is arranged at the connection of the circulation pipe and the dilution pipe.

[0007] Compared with the prior art, it has the following beneficial effects:

[0008] The aquaculture seawater tail water is purified by flowing through a multi-stage purification pond with a stepped structure. After being desalinated through a dilution pipe, the aquaculture seawater tail water undergoes biological purification in the purification pond in combination with the planting of halophytes on the floating bed, so as to reduce the salt content in the discharged aquaculture seawater tail water. In this application, by setting up multi-stage purification ponds and floating beds for planting halophytes in the purification ponds, the aquaculture seawater tail water is purified in multiple stages, effectively improving the desalination efficiency of the aquaculture seawater tail water and reducing its discharged salt content. Brief Description of the Drawings

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, 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 utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0010] Figure 1 It is a schematic diagram of an ecological discharge system for biological purification of aquaculture sewage of the present utility model;

[0011] Figure 2 It is a partial enlarged schematic diagram of part A of the present utility model;

[0012] Figure 3 It is a partial enlarged schematic diagram of part B of the present utility model;

[0013] Figure 4 It is a schematic diagram of another embodiment of the ecological discharge system of the present utility model;

[0014] Figure 5 It is a partial enlarged schematic diagram of part C of the present utility model;

[0015] Figure 6 It is a side view of another embodiment of the ecological discharge system of the present utility model.

[0016] In the figure, 1 - purification pond; 2 - sewage inlet pipe; 3 - drain pipe; 4 - dilution pipe; 5 - floating bed; 6 - overflow channel; 7 - partition net; 8 - planting pot; 9 - circulation pipe; 10 - three-way valve. Detailed Embodiment

[0017] For a better understanding of the structure of the present utility model and the functional features and advantages that can be achieved, the following will describe the preferred embodiments of the present utility model in detail in conjunction with the drawings as follows:

[0018] Embodiment:

[0019] As Figures 1 to 3As shown in the figure, the present utility model provides an ecological discharge system for biological purification of seawater aquaculture sewage, which includes a multi-stage purification tank 1. The multi-stage purification tank 1 is distributed in a stepped structure. The purification tank 1 at the upper end is connected with a sewage inlet pipe 2, and the purification tank 1 at the lower end is connected with a drain pipe 3. A dilution pipe 4 is communicated with the sewage inlet pipe 2, and the dilution pipe 4 is used to neutralize and desalinate the salt content by mixing tap water with seawater aquaculture tail water. A floating bed 5 for purifying biological planting is arranged in the purification tank 1, so as to facilitate the planting of halophytes to absorb and purify the salt content in the aquaculture seawater tail water, so as to reduce the salt content in the seawater tail water. An overflow channel 6 is arranged on one side of the purification tank 1. The purification tank 1 enables the seawater aquaculture sewage to flow from top to bottom to each purification tank 1 through the overflow channel 6 for multi-stage purification, so as to enable the seawater tail water to flow from top to bottom to contact with the halophytes in the multiple purification tanks 1 for biological purification.

[0020] See Figure 2 and Figure 3 , a partition net 7 is arranged on the overflow channel 6; the overflow channel 6 on the purification tank 1 at the lowermost end is in a triangular structure, and the drain pipe 3 is connected thereto, so that the purified seawater can be introduced into the drain pipe 3 through the triangular overflow channel 6 for discharge. The purified seawater can be re-drained into the aquaculture pond.

[0021] See Figure 2 and Figure 3 , a plurality of planting pots 8 are evenly arranged on the floating bed 5, so as to facilitate the planting of halophytes such as Suaeda glauca, Salicornia europaea, Tripolium vulgare, Sesuvium portulacastrum and Atriplex patens to desalt the seawater aquaculture sewage and reduce the high-salt discharge of the seawater aquaculture tail water.

[0022] Furthermore, microalgae can also be cultured in the purification tank 1. Microalgae cells can absorb nutrients such as nitrogen and phosphorus in the wastewater and convert the pollutants in the water body into cell structure and functional components.

[0023] As another embodiment of the present application, as Figures 4 to 6 shown, the present application further includes a circulation pipe 9. One end of the circulation pipe 9 is communicated with the drain pipe 3, and the other end of the circulation pipe 9 is communicated with the dilution pipe 4. A three-way valve 10 is arranged at the connection of the circulation pipe 9 and the dilution pipe 4. The three-way valve 10 is an electric three-way valve 10, and the electric three-way valve 10 is used to switch the circulation pipe 9 and the dilution pipe 4 to be separately communicated with the sewage inlet pipe 2. When it is necessary to dilute the purified seawater by circulating it with the seawater aquaculture tail water in the sewage inlet pipe 2, control the three-way valve 10 to make the circulation pipe 9 communicate with the sewage inlet pipe 2; when it is necessary to dilute the tap water with the seawater aquaculture tail water in the sewage inlet pipe 2, control the three-way valve 10 to make the dilution pipe 4 communicate with the sewage inlet pipe 2.

[0024] Furthermore, a salinity sensor for salinity monitoring is provided inside the drain pipe 3 of the present application. The salinity sensor detects the salinity of the purified seawater in the drain pipe 3. When the salinity is low, it can be used as water for diluting the tail water of the aquaculture seawater. At this time, the three-way valve 10 opens the connection between the circulation pipe 9 and the sewage inlet pipe 2; when the salinity is higher than the standard, the three-way valve 10 opens the connection between the dilution pipe 4 and the sewage inlet pipe 2 to achieve dilution of the tail water of the aquaculture seawater with tap water.

[0025] A sludge discharge pipe is provided at the bottom of the purification tank 1 of the present application. The sludge discharge pipe is connected to a sludge pump to discharge the sludge at the bottom of the purification tank 1 through the sludge pump.

[0026] The above are only the preferred embodiments of the present utility model and do not impose any formal restrictions on the present utility model. Any person skilled in the art can, without departing from the scope of the technical solution of the present utility model, make many possible changes and modifications to the technical solution of the present utility model by using the above technical content, or modify it into equivalent embodiments with equivalent changes. 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. An ecological discharge system for biological purification of marine aquaculture wastewater, characterized in that: The invention comprises a multi-stage purification pool (1), wherein the purification pools (1) are arranged in a stepped structure, wherein the purification pool (1) at the upper end is connected to a sewage inlet pipe (2), and the purification pool (1) at the lower end is connected to a drainage pipe (3), wherein the sewage inlet pipe (2) is connected to a dilution pipe (4), and wherein a floating bed (5) for purifying biological planting is arranged in the purification pool (1); and an overflow channel (6) is arranged on one side of the purification pool (1), and wherein the purification pool (1) allows the seawater aquaculture sewage to flow from top to bottom to each of the purification pools (1) through the overflow channel (6) for multi-stage purification.

2. The ecological discharge system for biological purification of marine aquaculture wastewater according to claim 1 is characterized in that: The overflow channel (6) is provided with a partition net (7); the overflow channel (6) located on the purification pool (1) at the bottom is a triangular structure, and the drainage pipe (3) is connected thereto.

3. The ecological discharge system for biological purification of marine aquaculture wastewater according to claim 2 is characterized in that: A plurality of planting pots (8) are evenly distributed on the floating bed (5).

4. The ecological discharge system for biological purification of marine aquaculture wastewater according to claim 2 is characterized in that: It also comprises a circulation pipe (9), one end of which is connected to the drainage pipe (3), and the other end of which is connected to the dilution pipe (4).

5. The ecological discharge system for biological purification of marine aquaculture wastewater according to claim 4 is characterized in that: A three-way valve (10) is provided at the connection between the circulation pipe (9) and the dilution pipe (4).

6. The ecological discharge system for biological purification of marine aquaculture wastewater according to claim 1 is characterized in that: A mud discharge pipe is provided at the bottom of the purification tank (1), and the mud discharge pipe is connected to a mud discharge pump.

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