Cultivation tail water treatment device

Abstract

The utility model discloses a culture tail water treatment device which comprises a treatment pond provided with a water inlet pipeline and a water outlet pipeline, culture tail water enters from the water inlet pipeline and flows out from the water outlet pipeline after being treated, a plurality of activated carbon filler walls are fixedly arranged in the treatment pond at intervals, and overflow weirs with different heights are arranged on the activated carbon filler walls. The weir positions are alternately arranged left and right according to the water flow direction, the overflow weir close to the water inlet pipeline is higher than the overflow weir close to the water outlet pipeline, and the overflow weir close to the water outlet pipeline is higher than the water outlet pipeline; a plurality of suspended filler bags are arranged between the activated carbon filler walls, and suspended filler in the suspended filler bags is filler prepared from reed straw; a stirring wheel is arranged in the middle in the treatment tank; the aeration device is arranged at the bottom of the treatment pond, and various technical measures such as the activated carbon filler wall, the suspended filler bag, the stirring wheel and the aeration device are adopted and jointly and synergistically act, so that the decontamination treatment effect of the aquaculture tail water is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sewage treatment, specifically is suitable for aquaculture tail water treatment device. BACKGROUND

[0002] China's aquaculture output (mainly in large-scale farming) accounts for more than half of the world's total aquaculture output, making an important contribution to the world's supply of aquatic products. However, the feed participation and excrement in the process of aquaculture pollute the water and the pond bottom, and their unreasonable release has a great impact on the surrounding water environment. In addition, in the process of aquaculture, the tail water may cause the content of organic pollutants such as antibiotics in the aquaculture wastewater to be too high without complete treatment. These organic pollutants may enter the surrounding water environment with the discharge of aquaculture wastewater, causing potential harm to the ecosystem. They may affect the normal growth and reproduction of aquatic organisms, disrupt the balance of aquatic ecology, and even possibly pass through the food chain, ultimately having adverse effects on human health.

[0003] The existing tail water treatment device mostly uses physical suspension method, which can only remove large particle impurities in tail water, and the method and measure are single, and the decontamination effect is poor. SUMMARY

[0004] The utility model aims at providing a kind of aquaculture tail water treatment device, and multiple decontamination technical measures are taken for pollutants in aquaculture wastewater to improve decontamination effect.

[0005] An aquaculture tail water treatment device includes a treatment tank with an inlet pipe and an outlet pipe. The aquaculture tail water enters through the inlet pipe and flows out through the outlet pipe after treatment. A plurality of activated carbon filler walls are fixedly arranged in the treatment tank. The activated carbon filler walls are provided with overflow weirs with different heights. The weir positions are alternately arranged left and right according to the water flow direction. The height of the overflow weir near the inlet pipe is higher than that near the outlet pipe, and the height of the overflow weir near the outlet pipe is higher than the height of the outlet pipe.

[0006] A plurality of suspended filler bags are arranged between the activated carbon filler walls. The suspended filler in the suspended filler bag is prepared from reed straw.

[0007] A stirring wheel is arranged at the center of the treatment tank.

[0008] An aeration device is arranged at the bottom of the treatment tank.

[0009] The left and right alternately arranged overflow weirs have good water distribution uniformity. The activated carbon filler wall, suspended filler bag, stirring wheel and aeration device work together to improve the aquaculture tail water decontamination treatment effect.

[0010] Preferably, all the activated carbon filling walls are arranged obliquely, and the angle of inclination with the bottom surface of the treatment tank ranges from 60° to 75°, and the direction of inclination is the direction of water flow.

[0011] The obliquely arranged activated carbon filling wall increases the contact time of the aquaculture tail water with the activated carbon filling wall, and improves the pollutant filtration rate of the activated carbon filling wall.

[0012] Preferably, the activated carbon filling wall comprises a wire mesh, an activated carbon filling plate and a detachable fixing connector, the wire mesh is arranged on both sides of the activated carbon filling plate, the detachable fixing connector is arranged through the wire mesh and the activated carbon filling plate and is screwed and fixed.

[0013] The activated carbon filling plate is coated with corn fiber, and the inside is filled with activated carbon filling material, and the activated carbon filling material is prepared from reed stalks.

[0014] The activated carbon filling material prepared from reed stalks has low manufacturing cost, realizes resource utilization of agricultural waste and has good decontamination effect.

[0015] Preferably, rotating shafts are rotatably connected to the two side walls at the central position in the length direction of the treatment tank, and stirring wheels are fixedly connected to the rotating shafts, a plurality of curved blades are uniformly distributed in the circumferential direction of the stirring wheels, the blades are curved towards the direction of the water inlet pipe, and part of the blades is above the water level line in the treatment tank and part of the blades is below the water level line.

[0016] The rotating stirring wheels improve the uniformity of the sewage and also promote the dissolution of oxygen in the air into the sewage.

[0017] Preferably, the aeration device comprises an oxygen aeration disc and an ozone aeration disc.

[0018] The oxygen aeration provides oxygen conditions for the growth and reproduction of microorganisms and the treatment of sewage, and the ozone aeration oxidizes and decomposes the organic matter produced or attached to the surface of the suspended filling package or the surface of the activated carbon filling wall in the reaction, thereby preventing the pores from being blocked.

[0019] The above technical solution can bring the following beneficial effects:

[0020] 1. The activated carbon filling wall, the suspended filling package, the stirring wheel and the aeration device are combined to improve the decontamination treatment effect of the aquaculture tail water.

[0021] 2. The left and right alternating overflow weirs and the stirring wheel driven by flowing water make the water distribution uniform, the sewage can be more uniformly distributed in the treatment area, and the situation of local over-treatment or under-treatment is avoided. The short flow phenomenon is effectively reduced, and the contact reaction time of the sewage and the filling material is prolonged.

[0022] 3. The activated carbon filler is made from reed straw, which enables carbon sequestration and resource utilization of agricultural waste, reducing reliance on traditional resources such as coal. Furthermore, treated wastewater can be reused, enabling in-situ recycling of aquaculture tailwater and conserving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall schematic diagram of the aquaculture tail water treatment device;

[0024] Figure 2 This is a schematic diagram of the internal structure of the aquaculture tailwater treatment device;

[0025] Figure 3 Schematic diagram of the activated carbon adsorption wall structure;

[0026] Figure 4 This is a schematic diagram of the aeration plate layout;

[0027] Figure 5 Schematic diagram of the aeration device pipeline.

[0028] In the figure: 100. Treatment tank; 101. Water inlet pipe; 102. Water outlet pipe; 200. Activated carbon filler wall; 201. Wire mesh; 202. Activated carbon filler plate; 203. Overflow weir; 204. Activated carbon filler; 210. Suspended filler bag; 320. Agitator wheel; 321. Rotating shaft; 301. Oxygen aeration plate; 302. Ozone aeration plate; 303. Oxygen gas main valve; 304. Gas distribution pipe valve; 305. Ozone gas main valve; 306. Gas distribution pipe; 307. Diversion pipe. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "installation", "connection", "arrangement" should be understood broadly, for example, it can be fixedly connected, arranged, or it can be detachably connected, arranged, or integrally connected, arranged. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0032] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "several" is two or more than two, unless there is definite specific limitation. Embodiment 1:

[0033] Please refer to Figures 1-5 The utility model provides a technical scheme: a breeding tail water treatment device.

[0034] Please refer to Figure 1 The breeding tail water treatment device comprises a breeding tail water treatment pool 100, an inlet water pipeline 101 and an outlet water pipeline 102 are arranged on the side wall of the breeding tail water treatment pool 100, the inlet water pipeline 101 is arranged at a position higher than the outlet water pipeline 102 with respect to the pool bottom, breeding tail water enters the treatment pool 100 through the inlet water pipeline 101, and the water treated is discharged through the outlet water pipeline 102.

[0035] Please refer to Figure 2 The dotted line in the figure represents the water level line, a plurality of activated carbon filler walls 200 are fixedly arranged in the treatment pool 100 at intervals, the activated carbon filler walls 200 are all provided with overflow weirs 203 with different heights, and the weir positions are alternately arranged left and right according to the water flow direction. The overflow weir 203 of the activated carbon filler wall 200 close to the inlet water pipeline 101 is the highest, the overflow weir 203 of the activated carbon filler wall 200 close to the outlet water pipeline 102 is the lowest, but the height is higher than the height of the outlet water pipeline 102, and the height of the overflow weir 203 of the remaining activated carbon filler walls 200 is between the two.

[0036] All the activated carbon filler walls 200 are arranged to be inclined, and the inclination angle with the bottom surface of the treatment pool 100 ranges between 60° and 75°, and the inclination direction is the water flow direction, and in the embodiment, the inclination angle is 75°.

[0037] The activated carbon filler wall 200 arranged to be inclined increases the contact time of breeding tail water and the activated carbon filler wall 200, and improves the pollutant filtration rate of the activated carbon filler wall 200.

[0038] Please refer to Figure 3The active carbon filler wall 200 comprises a wire mesh 201, an active carbon filler plate 202 and detachable fixing connectors.

[0039] The wire mesh 201 is arranged on both sides of the active carbon filler plate 202, and the detachable fixing connectors are arranged through the wire mesh 201 and the active carbon filler plate 202. In the embodiment, the detachable fixing connectors comprise threaded rods, nuts and gaskets (not shown in the figure). The threaded rods pass through the wire mesh 201 and the active carbon filler plate 202. Two gaskets are respectively sleeved on the threaded rods exposed outside, and two nuts are respectively threadedly connected with the threaded rods exposed outside and are tightened and fixed.

[0040] The active carbon filler plate 202 is coated with corn fiber and filled with active carbon filler 204. The active carbon filler 204 is prepared from reed straws.

[0041] The thickness of the corn fiber is controlled to be between 0.05-0.2 mm, the fiber diameter is controlled to be between 10-50 microns, and the pore diameter is controlled to be between 50-200 microns. The appropriate corn fiber specification is conducive to preventing the leakage of the active carbon filler while ensuring good air permeability, and the relatively thin thickness also saves costs to a certain extent.

[0042] The active carbon filler is a material of the prior art. The washed reed straws are cut into 20 cm small pieces and placed in a nitrogen-filled incinerator for carbonization at a temperature of 300-500℃. The process lasts for 24 hours. The prepared active carbon has a micropore diameter less than 2 nm, a mesopore diameter ranging from 2-50 nm and a macropore diameter greater than 50 nm. The micropores have a large specific surface area and are the basis of the adsorption of the active carbon filler. The mesopores further enhance the adsorption capacity of certain slightly larger molecules and provide a channel for the transmission of water in the active carbon, making the adsorption process smoother. The macropores are mainly responsible for the rapid transmission of substances, so that the water can more conveniently enter the mesopores and micropores in the active carbon.

[0043] Please refer to Figure 2 The treatment tank 100 is provided with a rotating shaft 321 rotatably connected to the side walls at the central position in the length direction of the treatment tank 100, and a stirring wheel 320 is fixedly connected to the rotating shaft 321. The stirring wheel 320 is uniformly provided with a plurality of curved blades in the circumferential direction. The blades are curved towards the water inlet pipe 101. The blade part of the stirring wheel 320 is above the water level line in the treatment tank 100, and part of the blade part is below the water level line.

[0044] The rotating stirring wheel 320 improves the uniformity of the sewage and promotes the dissolution of oxygen in the air into the sewage.

[0045] A plurality of suspended filler bags 210 are arranged in the sewage between the activated carbon filler walls (200) in the treatment tank 100, and the suspended filler is prepared by reed straw. The reed straw is washed with clean water, cut into 20 cm long stem segments, and dried to be used as suspended filler. The cut reed straw is placed in small bags made of corn fiber, and the amount of reed straw in each filler bag should not be too much. The filling rate of the suspended filler in the filler bag is about 60%-65%. The suspended filler is put into the treatment tank 100 in the form of a bag. The filler of the suspended filler bag 210 is attached with microorganisms for purifying sewage.

[0046] Please refer to Figure 4 and 5 , the aeration device is fixedly arranged at the bottom of the treatment tank 100, including an oxygen aeration disc 301, an ozone aeration disc 302, an oxygen gas supply total valve 303, a gas distribution pipe valve 304, an ozone gas supply total valve 305, a gas supply pipe 306, and a shunt pipe 307. Among them, the oxygen aeration disc 301 and the ozone aeration disc 302 are alternately installed at the bottom of the treatment tank 100, the gas inlet is connected with the gas supply pipeline, the gas supply pipeline penetrates into the bottom of the treatment tank 100, and the outer connecting gas supply pipe is connected with the gas storage device. The oxygen aeration utilizes the oxygen gas supply total valve 303 for total control, and the oxygen enters the shunt pipe 307 through the gas supply pipe 306. Each shunt pipe 307 can be individually controlled by the gas distribution pipe valve 304. The installation and setting of the ozone aeration are the same as those of the oxygen aeration, which will not be described in detail.

[0047] In use, the sewage enters the treatment tank 100 through the water inlet pipeline 101, first enters between the front side wall and the activated carbon filler wall 200 close to the water inlet pipeline 101 (for the sake of description, the activated carbon filler walls 200 arranged from the water inlet pipeline 101 to the water outlet pipeline 102 are called the first activated carbon filler wall, the second activated carbon filler wall, the third activated carbon filler wall, etc.). Part of the sewage penetrates into the area between the first activated carbon filler wall and the second activated carbon filler wall through the first activated carbon filler wall. When the sewage penetrates the first activated carbon filler wall, the organic pollutants and nutrients such as nitrogen and phosphorus in the sewage are removed by adsorption and filtration, completing the first filtration and decontamination process. Most of the sewage is concentrated in the area between the first activated carbon filler wall and the front side wall. As the water level rises, the sewage flows over the upper part of the overflow weir 203 on the first activated carbon filler wall and enters the area between the first activated carbon filler wall and the second activated carbon filler wall. The overflow weirs arranged left and right staggered control the flow rate and direction.

[0048] The areas between the first activated carbon filler wall and the second activated carbon filler wall and the areas between the subsequent activated carbon filler walls are evenly distributed with a plurality of suspended filler bags 210, which, in addition to the adsorption and filtration of organic pollutants and nutrients such as nitrogen and phosphorus in sewage by the activated carbon filler wall as described above, mainly remove the organic pollutants and nutrients such as nitrogen and phosphorus in sewage through the cooperation of the suspended filler bags 210 and the microorganisms attached thereto. At the same time, when the sewage flows through these areas, the oxygen gas supply main valve 303 and the ozone gas supply main valve 305 are opened, and aeration is performed by the aeration disc in the treatment tank 100, and the aeration amount is controlled and adjusted by the gas distribution pipe valve 304 according to the actual situation. Among them, the oxygen aeration provides oxygen conditions for the growth and reproduction of microorganisms and sewage treatment, and the ozone aeration is mainly used for oxidizing and decomposing the organic matter produced or attached on the surface of the suspended filler bag 210 or the surface of the activated carbon filler wall 200 in the reaction to prevent pore blockage. The water flow passes through the activated carbon filler wall 200 with the left and right alternately arranged overflow weirs 203, which prolongs the contact time of the water flow and the filler and ensures the efficiency of the sewage treatment reaction. The overflow process in the area between the first activated carbon filler wall and the second activated carbon filler wall is the same as above, and will not be described in detail.

[0049] The sewage treatment process in the areas between the subsequent activated carbon filler walls is the same as the sewage treatment process in the area between the first activated carbon filler wall and the second activated carbon filler wall.

[0050] When the sewage flows through the central position of the length direction of the treatment tank 100, the water flow drives the stirring wheel 320 to rotate, without consuming energy. The rotating stirring wheel 320 improves the uniformity of the sewage and promotes the dissolution of oxygen in the air into the sewage.

[0051] After the sewage is filtered and treated for the last time by the activated carbon filler wall 200 close to the water outlet pipeline 102, it is discharged from the water outlet pipeline 102.

[0052] The aquaculture tail water is treated by the treatment device of the present application, and the suspended filler bag 210 with attached microorganisms is mainly used for sewage treatment. In addition, the activated carbon filler wall 200 is used for activated carbon adsorption treatment to further remove the odor and color of the water body, and the stirring wheel 320 and the aeration device are used for stirring and aeration, which improves the efficiency of the aquaculture tail water sewage treatment.

Claims

1. A device for treating aquaculture tail water, comprising a treatment pool (100) provided with an inlet pipe (101) and an outlet pipe (102), wherein the aquaculture tail water enters through the inlet pipe (101) and flows out through the outlet pipe (102) after treatment, and is characterized in that: A plurality of activated carbon filling walls (200) are fixedly arranged in the treatment pool (100), and overflow weirs (203) of different heights are arranged on each activated carbon filling wall (200). The weir positions are alternately arranged left and right according to the direction of water flow, and the overflow weir (203) close to the water inlet pipe (101) is higher than the overflow weir (203) close to the water outlet pipe (102), and the overflow weir (203) close to the water outlet pipe (102) is higher than the water outlet pipe (102); A plurality of suspended filler bags (210) are arranged between the activated carbon filler walls (200), wherein the suspended filler in the suspended filler bags (210) is a filler prepared by selecting reed straw; A stirring wheel (320) is provided at a central position in the treatment tank (100); An aeration device is provided at the bottom of the treatment tank (100).

2. The aquaculture tail water treatment device according to claim 1, characterized in that: All activated carbon filler walls (200) are tilted, with the tilt angle ranging from 60° to 75° with respect to the bottom surface of the treatment tank (100), and the tilt direction is the direction of water flow.

3. The aquaculture tail water treatment device according to claim 2, characterized in that: An activated carbon filler wall (200) comprises a wire mesh (201), an activated carbon filler plate (202) and a detachable fixed connection piece; The wire mesh (201) is arranged on both sides of the activated carbon filling plate (202), and the detachable fixed connection piece is passed through the wire mesh (201) and the activated carbon filling plate (202) and is tightened and fixed; The activated carbon filler plate (202) is coated with corn fiber and filled with an activated carbon filler (204) therein. The activated carbon filler (204) is a filler prepared from reed straw.

4. The aquaculture tail water treatment device according to claim 1, characterized in that: A rotating shaft (321) is rotatably connected to both side walls at a central position in the longitudinal direction of the treatment tank (100), and a stirring wheel (320) is fixedly connected to the rotating shaft (321). The stirring wheel (320) has a plurality of curved blades evenly distributed in the circumference, and the blades are curved toward the water inlet pipe (101). Part of the blades is above the water level line in the treatment tank (100), and part is below the water level line.

5. The aquaculture tail water treatment device according to claim 1, characterized in that: The aeration device comprises an oxygen aeration disk (301) and an ozone aeration disk (302).

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