A tail water purification system for culturing pearl mussels

Abstract

The present application comprises a plurality of microbial treatment tanks as a primary treatment aquaculture tail water stage, and a water plant purification tank as a secondary treatment aquaculture tail water stage; wherein the aquaculture tail water enters different microbial treatment tanks through a plurality of tail water inlet pipes; an active sludge and an aeration mechanism for water purification are arranged at the bottom of the microbial treatment tank; and the water plant purification tank is connected with the plurality of microbial treatment tanks through a pipeline. In the present application, the microbial treatment tank is provided with a cover of a sandwich cover on the active sludge layer, and the aeration efficiency is improved by narrowing the space, so as to improve the water purification efficiency of the microorganisms. Meanwhile, the nitrogen and phosphorus substances after the microbial treatment can be recycled through the adsorbent filled in the sandwich cover, and used as resourceful nitrogen and phosphorus fertilizers. In addition, the water quality after the primary treatment aquaculture tail water stage is further adsorbed and treated by the water plants, so that the recycling and reuse after the water quality purification can be met.

Description

Technical Field

[0001] This invention relates to the field of aquaculture wastewater purification technology, and in particular to a wastewater purification system for pearl mussel farming. Background Technology

[0002] Sources and characteristics of wastewater: Nutrient enrichment: Uneaten feed during aquaculture settles in the sediment or dissolves in the water, leading to increased levels of nutrients such as ammonia nitrogen, nitrite, nitrate, and phosphorus. Drug residues: The use of antibiotics and disinfectants to prevent and treat diseases can leave drug residues in the water. Biological metabolic products: Excrement from aquatic animals, carbon dioxide and ammonia produced by respiration, and dead and sloughed tissues are all biological metabolic byproducts. Organic matter accumulation: The accumulation of organic matter such as feed residue and animal / plant carcasses increases the organic load on the water, leading to water quality deterioration. Microbial contamination: Under high-density aquaculture conditions, the number of bacteria, viruses, and other microorganisms in the water increases, potentially causing disease transmission.

[0003] However, current technologies cannot effectively treat the wastewater from pearl mussel farming, reduce environmental pollution, or achieve resource recycling. Summary of the Invention

[0004] The purpose of this invention is to provide a wastewater purification system for pearl mussel farming, solving the problem of how to purify the wastewater from pearl mussel farming and utilize the waste.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This invention provides a wastewater purification system for pearl mussel farming, including multiple microbial treatment tanks as the primary treatment stage for farmed wastewater and aquatic plant purification tanks as the secondary treatment stage for farmed wastewater.

[0007] The aquaculture wastewater enters different microbial treatment tanks through multiple wastewater inlet pipes; activated sludge and aeration mechanisms for water purification are installed at the bottom of each microbial treatment tank.

[0008] The aquatic plant purification pool is connected to multiple microbial treatment pools through pipes. The aquatic plant purification pool is equipped with an adsorption layer for further purifying water quality and a substrate layer for cultivating aquatic plants.

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

[0010] The microbial treatment tank is equipped with a double-layer cover that covers the activated sludge layer; a lifting mechanism for adjusting the installation depth of the double-layer cover is also provided above the microbial treatment tank.

[0011] Furthermore, the jacket of the jacket is filled with an adsorbent that adsorbs nitrogen and phosphorus substances, and adsorption holes are provided on the inner wall of the jacket to facilitate contact with water.

[0012] A support frame is also provided inside the jacket, and aeration insertion cones for inserting activated sludge are evenly spaced on the support frame.

[0013] The aeration insertion cone is a hollow cone structure, which is connected to an aeration mechanism located outside the jacketed cover through an aeration pipe; an aeration slit is provided on the outer peripheral wall of the aeration insertion cone; and a guide pipe for removing the adsorbent filler is provided on the outer peripheral wall of the jacketed cover.

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

[0015] The built-in gas delivery pipe is coiled around the support frame.

[0016] Furthermore, the lifting mechanism includes an opening and closing transmission seat mounted on the top of the microbial treatment tank via a frame, a screw mounted on the opening and closing transmission seat, and a screw motor mounted on the opening and closing transmission seat for adjusting the lifting of the screw; wherein the top of the jacket is connected to the lower end of the screw.

[0017] Furthermore, multiple guide rods are vertically installed on the interlayer cover, and bushings adapted to the guide rods are provided on the frame.

[0018] Furthermore, an aeration box is provided in the aquatic plant purification pool, and a support layer is provided in the aquatic plant purification pool and directly above the aeration box. An adsorption layer and a substrate layer are provided on the support layer. Aquatic plants are planted in the substrate layer. Multiple porous adsorption mesh belts are provided at the bottom of the support layer. The aeration box has aeration holes facing the bottom of the porous adsorption mesh belts. The aeration box is connected to an air pump located above the aquatic plant purification pool through an air supply pipe.

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

[0020] This invention includes multiple microbial treatment tanks for the primary treatment stage of aquaculture wastewater and an aquatic plant purification tank for the secondary treatment stage. The microbial treatment tanks are covered by a double-layered cover over an activated sludge layer. By reducing the space, aeration efficiency is improved, thereby enhancing the water purification efficiency of the microorganisms. Simultaneously, the nitrogen and phosphorus substances treated by the microorganisms can be recovered through the adsorbent filled within the double-layered cover, serving as nitrogen and phosphorus fertilizers for resource utilization. Furthermore, this application utilizes aquatic plants to further adsorb and treat the water quality after the primary treatment stage of aquaculture wastewater, enabling the recycling and reuse of purified water. Attached Figure Description

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

[0022] Figure 1 This is a schematic diagram of the main structure of the tailwater purification system for pearl mussel farming according to the present invention;

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

[0024] Figure 3 A schematic diagram of an aquatic plant purification treatment structure;

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

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

[0027] Figure 6 for Figure 2 Enlarged structural diagram at point A in the middle;

[0028] Figure 7 for Figure 2 Enlarged structural diagram at point B.

[0029] Explanation of reference numerals in the attached drawings: 100, Microbial treatment tank; 101, Tailwater inlet pipe; 102, Primary drainage pipe; 103, Baffle plate; 200, Transfer pump; 300, Aquatic plant purification tank; 301, Substrate layer; 302, Adsorption layer; 303, Support layer; 304, Porous adsorption mesh belt; 305, Aeration box; 306, Air supply pipe; 307, Air pump; 400, Opening and closing transmission seat; 401, Screw; 402, Screw motor; 500, Jacket 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 supply pipe; 702, Internal air supply pipe. Detailed Implementation

[0030] like Figure 1 As shown, this embodiment discloses a wastewater purification system for pearl mussel farming, including multiple microbial treatment tanks 100 for primary wastewater treatment and aquatic plant purification tank 300 for secondary wastewater treatment. The wastewater enters different microbial treatment tanks 100 through multiple wastewater inlet pipes 101. Activated sludge 600 and an aeration mechanism for water purification are installed at the bottom of each microbial treatment tank 100. The aquatic plant purification tank 300 is connected to the multiple microbial treatment tanks 100 via pipes, and includes an adsorption layer 302 for further water purification and a substrate layer 301 for cultivating aquatic plants.

[0031] In this embodiment, multiple microbial treatment tanks 100 are connected to an aquatic plant purification tank 300 via a delivery pump 200 and a delivery pipe. Specifically, the delivery pump 200 is regulated to open and close via a controller. In actual use, the multiple microbial treatment tanks 100 serve as backups for each other. For example, the inlet of one microbial treatment tank 100 is closed to complete the first-stage water purification, and then the water is sent to the aquatic plant purification tank 300 for the second-stage water purification using the delivery pump 200 and the delivery pipe. At the same time, after the second microbial treatment tank 100 completes its water intake, its inlet and outlet are closed for biological harmless treatment. Then, the third microbial treatment tank 100 begins to receive water until it reaches its load capacity. At this point, the first microbial treatment tank 100 has finished discharging water and needs to be opened for water storage.

[0032] like Figure 2 As shown, the microbial treatment tank has a cylindrical structure, with an exhaust water inlet pipe 101 and a primary drainage pipe 102 installed on its outer peripheral wall; a double-layer cover 500 is installed inside the microbial treatment tank 100, covering the activated sludge 600 layer; a lifting mechanism for adjusting the installation depth of the double-layer cover 500 is also installed above the microbial treatment tank 100.

[0033] When in use, to improve biological anaerobic digestion or when fermentation is required, the jacket cover 500 can be placed over the activated sludge 600 layer.

[0034] like Figure 2 and Figure 6 As shown, the jacket of the jacketed cover 500 is filled with an adsorbent filler 501 that adsorbs nitrogen and phosphorus substances, and an adsorption hole 5011 is provided on the inner wall of the jacketed cover 500 to facilitate contact with water. In this embodiment, a guide tube 505 for removing the adsorbent filler 501 is installed on the outer peripheral wall of the jacketed cover 500.

[0035] The activated sludge 600 converts nitrogen and phosphorus in the effluent, making it easier for them to be adsorbed into the adsorption packing material, specifically a nitrogen and phosphorus adsorbent. The adsorbent containing adsorbed nitrogen and phosphorus can also be removed through the feed pipe 505 for use as fertilizer in agricultural production.

[0036] like Figure 2 As shown, a support frame 503 is also installed inside the jacket cover 500, and aeration insertion cones 506 for inserting activated sludge are evenly spaced on the support frame 503. Specifically, the aeration insertion cones 506 are hollow cone structures, which are connected to an aeration mechanism located outside the jacket cover 500 through aeration pipes. Aeration slots are provided on the outer peripheral wall of the aeration insertion cones 506 to facilitate sufficient aeration, improve the activity of aerobic bacteria, and thus accelerate water purification efficiency.

[0037] In this embodiment, as 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 supply pipe 701 communicating with the aeration pump 700, and an internal air supply pipe 702 mounted on the support frame 503 and used to connect the external air supply pipe 701 with the aeration insertion cone 506; wherein the internal air supply pipe 702 is coiled and mounted on the support frame 503, thereby achieving sufficient air supply to the aeration insertion cone 506.

[0038] In this embodiment, as Figure 2 As shown, the lifting mechanism includes an opening and closing transmission seat 400 mounted on the top of the microbial treatment tank 100 via a frame, a screw 401 mounted on the opening and closing transmission seat 400, and a screw motor 402 mounted on the opening and closing transmission seat 400 for adjusting the lifting of the screw 401; wherein the lower end of the screw 401 is connected to the top of the interlayer cover 500; thereby, the screw motor 402 drives the interlayer cover 500 to lift.

[0039] In this embodiment, a plurality of guide rods 502 are vertically installed on the interlayer cover 500, and a bushing adapted to the guide rods 502 is installed on the frame, wherein the guide rods 502 are used to limit and guide the interlayer cover 500.

[0040] In this embodiment, an aeration box 305 is installed inside the aquatic plant purification pond 300. A support layer 303 is installed inside the aquatic plant purification pond 300 and directly above the aeration box 305. An adsorption layer 302 and a substrate layer 301 are installed on the support layer 303. Aquatic plants are planted in the substrate layer 301. Multiple porous adsorption mesh belts 304 are installed at the bottom of the support layer 303. The aeration box 305 has aeration holes facing the bottom of the porous adsorption mesh belts 304. The aeration box 305 is connected to an air pump 307 located above the aquatic plant purification pond 300 via an air supply pipe 306. The aquatic plants can be reeds, water onions, cattails, etc.

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

[0042] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A wastewater purification system for pearl mussel farming, characterized in that: It includes multiple microbial treatment ponds (100) for primary treatment of aquaculture wastewater and aquatic plant purification ponds (300) for secondary treatment of aquaculture wastewater. The aquaculture wastewater enters different microbial treatment tanks (100) through multiple wastewater inlet pipes (101); activated sludge (600) and an aeration mechanism for water purification are provided at the bottom of the microbial treatment tank (100). The aquatic plant purification tank (300) is connected to multiple microbial treatment tanks (100) through pipes. The aquatic plant purification tank (300) is provided with an adsorption layer (302) for further purifying water quality and a substrate layer (301) for cultivating aquatic plants. The microbial treatment tank (100) is provided with a double-layer cover (500) covering the activated sludge (600) layer; a lifting mechanism for adjusting the installation depth of the double-layer cover (500) is also provided above the microbial treatment tank (100). The jacket of the jacket cover (500) is filled with an adsorbent filler (501) that adsorbs nitrogen and phosphorus substances, and an adsorption hole (5011) is provided on the inner wall of the jacket cover (500) to facilitate contact with water. A support frame (503) is also provided inside the jacket 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 jacket cover (500) through an aeration pipe; an aeration slit is provided on the outer peripheral wall of the aeration insertion cone (506); a guide pipe (505) for taking out the adsorbent filler (501) is provided on the outer peripheral wall of the jacket cover (500).

2. The tailwater purification system for cultured pearl mussels according to claim 1, characterized in that: The microbial treatment tank has a cylindrical structure, and its outer peripheral wall is provided with a tailwater inlet pipe (101) and a primary drainage pipe (102).

3. The tailwater purification system for cultured pearl mussels according to claim 2, characterized in that: The aeration mechanism includes 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) set on the support frame (503) and used to connect the external air supply pipe (701) and the aeration insertion cone (506). The built-in gas delivery pipe (702) is coiled around the support frame (503).

4. The tailwater purification system for cultured pearl mussels according to claim 3, characterized in that: The lifting mechanism includes an opening and closing transmission seat (400) mounted on the top of the microbial treatment tank (100) via a frame, a screw (401) mounted on the opening and closing transmission seat (400), and a screw motor (402) mounted on the opening and closing transmission seat (400) for adjusting the lifting of the screw (401); wherein the lower end of the screw (401) is connected to the top of the jacket cover (500).

5. The tailwater purification system for cultured pearl mussels according to claim 4, characterized in that: Multiple guide rods (502) are vertically installed on the interlayer cover (500), and bushings adapted to the guide rods (502) are provided on the frame.

6. The wastewater purification system for cultured pearl mussels according to claim 1, characterized in that: An aeration box (305) is provided in the aquatic plant purification pool (300). A support layer (303) is provided in the aquatic plant purification pool (300) and directly above the aeration box (305). An adsorption layer (302) and a substrate layer (301) are provided on the support layer (303). Aquatic plants are planted in the substrate layer (301). Multiple porous adsorption mesh belts (304) are provided at the bottom of the support layer (303). Aeration holes are provided on the aeration box (305) facing the bottom of the porous adsorption mesh belts (304). The aeration box (305) is connected to an air pump (307) located above the aquatic plant purification pool (300) through an air supply pipe (306).

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