Tail water purification system for pearl mussel culture

Abstract

The system comprises a plurality of microbiological treatment ponds in a primary treatment culture tail water stage and an aquatic plant purification pond in a secondary treatment culture tail water stage, wherein breeding tail water enters different microbiological treatment ponds through a plurality of tail water inlet pipes respectively; activated sludge for purifying water and an aeration mechanism are arranged at the bottom of the microbiological treatment tank; the aquatic plant purification pond is communicated with the plurality of microbiological treatment ponds through pipelines. In the microbiological treatment tank, an activated sludge layer is covered with an interlayer cover, the water quality purification efficiency of microorganisms is improved by reducing the space and improving the aeration efficiency, and meanwhile nitrogen and phosphorus substances treated by the microorganisms can be recycled through an adsorbent filled in the interlayer cover and serve as nitrogen and phosphorus fertilizers for resource utilization; in addition, the water quality after the stage of primary treatment of the culture tail water is further subjected to adsorption treatment by means of aquatic plants, and recycling of the purified water quality can be met.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture tail water purification, and in particular to a tail water purification system for aquaculture pearl oysters. Background Art

[0002] Sources and characteristics of tail water: Nutrient enrichment: Feed fed during the breeding process that is not fully ingested will settle to the bottom mud or dissolve in the water, resulting in an increase in the content of nutrients such as ammonia nitrogen, nitrite, nitrate, and phosphorus in the water. Drug residues: The use of antibiotics, disinfectants and other drugs to prevent and treat diseases may cause drug residues in the water. Biological metabolites: excrement of aquatic animals, carbon dioxide, ammonia, etc. produced by respiration, as well as biological metabolic byproducts such as dead and shed tissues. Organic matter accumulation: the accumulation of organic matter such as feed residues and animal and plant carcasses increases the organic load of the water body and causes water quality deterioration. Microbial contamination: Under high-density breeding conditions, the number of microorganisms such as bacteria and viruses in the water body increases, which may cause disease transmission.

[0003] However, the existing technology cannot effectively treat the tail water of cultured pearl oysters, reduce pollution to the environment, and achieve the recycling of resources. Summary of the invention

[0004] The purpose of the present invention is to provide a tail water purification system for cultured pearl oysters, so as to solve the problem of how to purify the tail water of cultured pearl oysters and utilize waste.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a tail water purification system for cultured pearl oysters, comprising a plurality of microbial treatment pools as a primary treatment stage for culture tail water, and an aquatic plant purification pool as a secondary treatment stage for culture tail water;

[0007] The aquaculture tail water enters different microbial treatment pools through a plurality of tail water inlet pipes; activated sludge and an aeration mechanism for water purification are arranged at the bottom of the microbial treatment pool;

[0008] The aquatic plant purification pool is connected to a plurality of the microorganism treatment pools through pipelines, and an adsorption layer for further purifying water quality and a substrate layer for cultivating aquatic plants are arranged in the aquatic plant purification pool.

[0009] Furthermore, the microbial treatment pool is a cylindrical structure, and its outer peripheral wall is provided with a tailwater inlet pipe and a primary drainage pipe;

[0010] A sandwich cover is arranged in the microbial treatment tank and covers the activated sludge layer; a lifting mechanism for adjusting the installation depth of the sandwich cover is also arranged above the microbial treatment tank.

[0011] Furthermore, the jacket of the sandwich cover is filled with an adsorption filler for adsorbing nitrogen and phosphorus substances, and adsorption holes for contacting water bodies are opened on the inner wall of the sandwich cover;

[0012] A support frame is also arranged in the sandwich cover, and aeration insertion cones for inserting activated sludge are evenly arranged on the support frame;

[0013] The aeration insert cone is a hollow cone structure, which is connected to the aeration mechanism outside the sandwich cover through an aeration pipe; an aeration slit is provided on the outer peripheral wall of the aeration insert cone; and a guide pipe for taking out the adsorption filler is provided on the outer peripheral wall of the sandwich cover.

[0014] Furthermore, the aeration mechanism includes an aeration pump located at the top of the microbial treatment tank, an external air pipe connected to the aeration pump, and an internal air pipe arranged on the support frame and used to connect the external air pipe with the aeration insertion cone;

[0015] The built-in air delivery pipe is coiled on the support frame.

[0016] Furthermore, the lifting mechanism includes an opening and closing transmission seat arranged on the top of the microbial treatment tank through a frame, a screw arranged on the opening and closing transmission seat, and a screw motor arranged on the opening and closing transmission seat and used to adjust the lifting of the screw; wherein the top of the interlayer cover is connected to the transmission at the lower end of the screw.

[0017] Furthermore, a plurality of guide rods are vertically mounted on the interlayer cover, and shaft sleeves adapted to the guide rods are arranged on the frame.

[0018] Furthermore, an aeration box is arranged in the aquatic plant purification tank, a support layer is arranged in the aquatic plant purification tank and directly above the aeration box, an adsorption layer and a matrix layer are arranged on the support layer; aquatic plants are planted in the matrix layer; a plurality of porous adsorption mesh belts are arranged at the bottom of the support layer, aeration holes facing the bottom of the porous adsorption mesh belts are opened on the aeration box, and the aeration box is connected to an air pump located above the aquatic plant purification tank through an air pipe.

[0019] Compared with the prior art, the beneficial technical effects of the present invention are:

[0020] The present invention is designed with multiple microbial treatment pools as the primary treatment stage of aquaculture tail water and an aquatic plant purification pool as the secondary treatment stage of aquaculture tail water; wherein the microbial treatment pool is covered by a sandwich cover on the activated sludge layer, and the aeration efficiency is improved by reducing the space, so as to improve the water purification efficiency of the microorganisms. At the same time, the nitrogen and phosphorus substances after the microbial treatment can be recovered through the adsorbent filled in the sandwich cover as nitrogen and phosphorus fertilizers for resource utilization; in addition, the present application also uses aquatic plants to further adsorb and treat the water quality after the primary treatment stage of aquaculture tail water, which can meet the recycling and reuse of water quality after purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the main structure of the tail water purification system for cultivating pearl oysters of the present invention;

[0023] Figure 2 This is a schematic diagram of the microbial nitrification treatment structure;

[0024] Figure 3 This is a schematic diagram of the aquatic plant purification treatment structure;

[0025] Figure 4 for Figure 2 Schematic diagram of the middle and outer shell structure;

[0026] Figure 5 for Figure 4 Schematic diagram of the internal aeration structure;

[0027] Figure 6 for Figure 2 The enlarged structural diagram at A in the middle;

[0028] Figure 7 for Figure 2 Enlarged structural diagram at B in the middle.

[0029] Explanation of the reference numerals: 100, microbial treatment tank; 101, tail water inlet pipe; 102, primary drainage pipe; 103, partition; 200, delivery pump; 300, aquatic plant purification tank; 301, matrix layer; 302, adsorption layer; 303, support layer; 304, porous adsorption mesh belt; 305, aeration box; 306, air pipe; 307, air pump; 400, opening and closing transmission seat; 401, screw; 402, screw motor; 500, interlayer cover; 501, adsorption filler; 5011, adsorption hole; 502, guide rod; 503, support frame; 504, aeration insertion cone; 505, material guide pipe; 600, activated sludge; 700, aeration pump; 701, external air pipe; 702, internal air pipe. DETAILED DESCRIPTION

[0030] like Figure 1 As shown, this embodiment discloses a tailwater purification system for cultured pearl oysters, including multiple microbial treatment pools 100 as the primary treatment stage of culture tailwater, and an aquatic plant purification pool 300 as the secondary treatment stage of culture tailwater. The culture tailwater enters different microbial treatment pools 100 through multiple tailwater inlet pipes 101 respectively; activated sludge 600 and an aeration mechanism for water purification are installed at the bottom of the microbial treatment pool 100; the aquatic plant purification pool 300 is connected to multiple microbial treatment pools 100 through pipelines, and an adsorption layer 302 for further purifying water and a substrate layer 301 for cultivating aquatic plants are installed in the aquatic plant purification pool 300.

[0031] In this embodiment, multiple microbial treatment pools 100 are connected to the aquatic plant purification pool 300 through a delivery pump 200 and a delivery pipe; specifically, the delivery pump 200 is adjusted to open and close by a controller; when in use, multiple microbial treatment pools 100 are standby for each other. For example, the water inlet end of one of the microbial treatment pools 100 is closed to complete the first-level water purification, and then the water is delivered to the aquatic plant purification pool 300 by the delivery pump 200 and the delivery pipe for secondary water purification; at the same time, after the second microbial treatment pool 100 completes the water intake, the water inlet and outlet ends are closed for biological harmless treatment, and then the third microbial treatment pool 100 starts to take in water until the load capacity is reached. At this time, the first microbial treatment pool 100 has just finished draining water and needs to be opened for water storage.

[0032] like Figure 2 As shown, the microbial treatment tank is a cylindrical structure, and a tailwater inlet pipe 101 and a primary drainage pipe 102 are installed on its outer wall; wherein a sandwich cover 500 covering the activated sludge 600 layer is installed in the microbial treatment tank 100; and a lifting mechanism for adjusting the installation depth of the sandwich cover 500 is also installed above the microbial treatment tank 100.

[0033] When in use, in order to enhance biological anaerobicity or fermentation, the sandwich cover 500 is provided on top of the activated sludge 600 layer.

[0034] like Figure 2 and Figure 6 As shown, the jacket of the sandwich cover 500 is filled with an adsorbent filler 501 for adsorbing nitrogen and phosphorus substances, and an adsorption hole 5011 for contacting water is opened on the inner wall of the sandwich cover 500. In this embodiment, a guide pipe 505 for taking out the adsorbent filler 501 is installed on the outer peripheral wall of the sandwich cover 500.

[0035] The activated sludge 600 converts the nitrogen and phosphorus in the tail water so that the nitrogen and phosphorus can be adsorbed in the adsorbent filler, which is a nitrogen and phosphorus adsorbent. The adsorbent containing nitrogen and phosphorus can also be taken out through the guide pipe 505 as fertilizer for agricultural production.

[0036] like Figure 2 As shown, a support frame 503 is also installed in the sandwich cover 500, and aeration insertion cones 506 for inserting activated sludge are evenly installed on the support frame 503; specifically, the aeration insertion cone 506 is a hollow cone structure, which is connected to the aeration mechanism located outside the sandwich cover 500 through an aeration pipe; an aeration slit is opened on the outer peripheral wall of the aeration insertion cone 506; thereby facilitating sufficient aeration, improving the activity of aerobic bacteria, and thereby accelerating the water purification efficiency.

[0037] In this embodiment, Figure 2 As shown, the aeration mechanism includes an aeration pump 700 located at the top of the microbial treatment tank 100, an external air pipe 701 connected to the aeration pump 700, and an internal air pipe 702 installed on the support frame 503 and used to connect the external air pipe 701 and the aeration insertion cone 506; wherein the internal air pipe 702 is coiled and installed on the support frame 503, so as to fully supply air to the aeration insertion cone 506.

[0038] In this embodiment, Figure 2 As shown, the lifting mechanism includes an opening and closing transmission seat 400 installed on the top of the microbial treatment tank 100 through a frame, a screw 401 installed on the opening and closing transmission seat 400, and a screw motor 402 installed on the opening and closing transmission seat 400 and used to adjust the lifting of the screw 401; wherein the top of the interlayer cover 500 is transmission-connected at the lower end of the screw 401; thereby, the interlayer cover 500 is driven to lift and lower by the screw motor 402.

[0039] In this embodiment, a plurality of guide rods 502 are vertically mounted on the sandwich cover 500 , and shaft sleeves adapted to the guide rods 502 are mounted on the frame, wherein the guide rods 502 are used to limit and guide the sandwich cover 500 .

[0040] In this embodiment, an aeration box 305 is installed in the aquatic plant purification pool 300, a support layer 303 is installed in the aquatic plant purification pool 300 and directly above the aeration box 305, an adsorption layer 302 and a matrix layer 301 are installed on the support layer 303; aquatic plants are planted in the matrix layer 301; a plurality of porous adsorption mesh belts 304 are installed at the bottom of the support layer 303, aeration holes are opened on the aeration box 305 facing the bottom of the porous adsorption mesh belt 304, and the aeration box 305 is connected to an air pump 307 located above the aquatic plant purification pool 300 through an air pipe 306. The aquatic plants can be reeds, water plantains, cattails, etc.

[0041] In this embodiment, the water that has undergone primary treatment of aquaculture tail water is pushed upward by the air pump 307 and the aeration box 305 to increase contact with the roots of aquatic plants, thereby further improving the adsorption effect of residual impurities.

[0042] The above embodiments are only descriptions of the preferred methods of the invention, and are not intended to limit the scope of the invention. Without departing from the design spirit of the invention, various modifications and improvements made to the technical solutions of the invention by ordinary technicians in this field should fall within the protection scope of the claims of the invention.

Claims

1. A tail water purification system for cultivating pearl oysters, characterized by: It includes a plurality of microbial treatment pools (100) as a primary stage of aquaculture tail water treatment, and an aquatic plant purification pool (300) as a secondary stage of aquaculture tail water treatment; The aquaculture tail water enters different microbial treatment pools (100) through a plurality of tail water inlet pipes (101); activated sludge (600) and an aeration mechanism for water purification are arranged at the bottom of the microbial treatment pool (100); The aquatic plant purification pool (300) is connected to a plurality of the microorganism treatment pools (100) via a pipeline, and an adsorption layer (302) for further purifying water quality and a substrate layer (301) for cultivating aquatic plants are arranged in the aquatic plant purification pool (300).

2. The tail water purification system for cultured pearl oysters according to claim 1, characterized in that: The microbial treatment pool is a cylindrical structure, and its outer peripheral wall is provided with a tail water inlet pipe (101) and a primary drainage pipe (102); A sandwich cover (500) is provided in the microbial treatment tank (100) and covers the activated sludge (600) layer; a lifting mechanism for adjusting the installation depth of the sandwich cover (500) is also provided above the microbial treatment tank (100).

3. The tail water purification system for cultured pearl oysters according to claim 2, characterized in that: The jacket of the sandwich cover (500) is filled with an adsorption filler (501) for adsorbing nitrogen and phosphorus substances, and adsorption holes (5011) are opened on the inner wall of the sandwich cover (500) for easy contact with water; A support frame (503) is also provided in the sandwich cover (500), and aeration insertion cones (506) for inserting activated sludge are evenly spaced on the support frame (503); The aeration insertion cone (506) is a hollow cone structure, which is connected to the aeration mechanism located outside the sandwich cover (500) through an aeration pipe; an aeration slit is provided on the outer peripheral wall of the aeration insertion cone (506); and a material guide pipe (505) for taking out the adsorption filler (501) is provided on the outer peripheral wall of the sandwich cover (500).

4. The tail water purification system for cultured pearl oysters according to claim 3, characterized in that: The aeration mechanism comprises an aeration pump (700) located at the top of the microbial treatment tank (100), an external air supply pipe (701) connected to the aeration pump (700), and an internal air supply pipe (702) arranged on the support frame (503) and used to connect the external air supply pipe (701) and the aeration insertion cone (506); The built-in air delivery pipe (702) is coiled and arranged on the support frame (503).

5. The tail water purification system for cultured pearl oysters according to claim 4, characterized in that: The lifting mechanism comprises an opening and closing transmission seat (400) arranged on the top of the microbial treatment tank (100) through a frame, a screw (401) arranged on the opening and closing transmission seat (400), and a screw motor (402) arranged on the opening and closing transmission seat (400) and used for adjusting the lifting and lowering of the screw (401); wherein the top of the interlayer cover (500) is transmission-connected at the lower end of the screw (401).

6. The tail water purification system for cultured pearl oysters according to claim 5, characterized in that: A plurality of guide rods (502) are vertically mounted on the interlayer cover (500), and shaft sleeves adapted to the guide rods (502) are arranged on the frame.

7. The tail water purification system for cultured pearl oysters according to claim 1, characterized in that: An aeration box (305) is arranged in the aquatic plant purification pool (300), a support layer (303) is arranged in the aquatic plant purification pool (300) and directly above the aeration box (305), an adsorption layer (302) and a matrix layer (301) are arranged on the support layer (303); aquatic plants are planted on the matrix layer (301); a plurality of porous adsorption mesh belts (304) are arranged at the bottom of the support layer (303), aeration holes facing the bottom of the porous adsorption mesh belts (304) are opened on the aeration box (305), and the aeration box (305) is connected to an air pump (307) located above the aquatic plant purification pool (300) through an air pipe (306).

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