Saline-alkali land blue crab culture water treatment system

Abstract

The utility model discloses a water treatment system for blue crab culture in saline-alkali soil. The water treatment system comprises a saline-alkali land underground water conveying pipeline, an aeration oxidation pond, a biological filter located on one side of the aeration oxidation pond, a water diversion assembly used for communicating the biological filter with the aeration oxidation pond, a precipitation reaction pond communicated with the biological filter through a water diversion pipeline, and a drainage pipe communicated with the blue crab culture pond. An aeration disc is fixedly mounted at the position, close to the bottom of the tank, in the aeration oxidation tank, and a plurality of air nozzles are uniformly arranged on the aeration disc. An air compressor is arranged outside the aeration oxidation pond and is communicated with the aeration disc through an air pipe, and the air pipe fixedly penetrates through the pond wall on the corresponding side of the aeration oxidation pond. According to the utility model, a three-section type water treatment system is established to reduce the iron content in the saline-alkali water, the whole treatment process is good in effect, precipitation generation and separation are integrated, and the inconvenience of step-by-step operation is eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to mud crab culture technical field, especially a kind of water treatment system for saline-alkali mud crab culture. BACKGROUND

[0002] In saline-alkali mud crab culture industry, since the content of iron ion in saline-alkali water is higher, and excessive iron element in culture water can block mud crab gill filament, affect trace element absorption, cause cell overoxidation, etc., cause respiratory disorder, metabolic disorder, oxidative stress and other adverse physiological reactions, therefore, it is necessary to process the water for culture, i.e., saline-alkali groundwater to reduce the content of iron ion to suitable culture standard.

[0003] When traditional active carbon adsorption method is used for water treatment, the adsorption characteristics of active carbon are used to remove iron ion, but it needs to be replaced regularly to ensure effect, and the capacity of physical adsorption is limited, and when lime precipitation method is used for treatment, insoluble precipitate is generated by chemical reaction of lime and iron ion, but since iron element in saline-alkali water generally exists in the form of divalent iron, it is not conducive to precipitation, so that the iron reduction treatment of saline-alkali water is not good. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a water treatment system for saline-alkali mud crab culture to reduce the content of iron in saline-alkali water, and to save the inconvenience of step-by-step operation.

[0005] A water treatment system for saline-alkali mud crab culture, comprising saline-alkali groundwater delivery pipeline;The water treatment system further comprises:

[0006] An aeration oxidation tank, whose water inlet is connected with the saline-alkali groundwater delivery pipeline;

[0007] A biological filter tank, which is located at one side of the aeration oxidation tank;

[0008] A water diversion assembly for connecting the biological filter tank and the aeration oxidation tank;

[0009] A sedimentation reaction tank connected with the biological filter tank through water diversion pipeline;And

[0010] A drain pipe fixedly connected at the outlet of the sedimentation reaction tank, which is connected with the mud crab culture pond.

[0011] As a further improvement of the above-mentioned scheme, the aeration oxidation tank is fixedly installed with aeration disc at the position close to the bottom of the tank, and the aeration disc is uniformly provided with a plurality of air nozzles.

[0012] As further improvement of the above scheme, the aeration oxidation tank is externally provided with an air compressor, which is connected with the air pipe and the aeration disc.

[0013] As further improvement of the above scheme, the aeration oxidation tank is externally provided with an air compressor, which is connected with the air pipe and the aeration disc.

[0014] As further improvement of the above scheme, the aeration oxidation tank is externally provided with an air compressor, which is connected with the air pipe and the aeration disc.

[0015] As further improvement of the above scheme, the aeration oxidation tank is externally provided with an air compressor, which is connected with the air pipe and the aeration disc.

[0016] As further improvement of the above scheme, the aeration oxidation tank is externally provided with an air compressor, which is connected with the air pipe and the aeration disc.

[0017] As further improvement of the above scheme, the aeration oxidation tank is externally provided with an air compressor, which is connected with the air pipe and the aeration disc.

[0018] As further improvement of the above scheme, the aeration oxidation tank is externally provided with an air compressor, which is connected with the air pipe and the aeration disc.

[0019] As further improvement of the above scheme, the aeration oxidation tank is externally provided with an air compressor, which is connected with the air pipe and the aeration disc.

[0020] As further improvement of the above scheme, the aeration oxidation tank is externally provided with an air compressor, which is connected with the air pipe and the aeration disc.

[0021] Compared with the prior art, the water treatment system has the beneficial effects that: a three-stage water treatment system is established, divalent iron ions in the breeding water are oxidized into trivalent iron ions, and then the trivalent iron ions are precipitated in the form of a precipitate, so that the effect of reducing the iron content in saline-alkali water is achieved, the whole treatment process is good in effect and integrates precipitation generation and separation, and the inconvenience of step-by-step operation is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The figure is a structural schematic diagram of a water treatment system for salt-alkali crab breeding provided by the utility model.

[0023] Figure 2 Figure 1 shows a water treatment schematic diagram of the present application, wherein arrow a indicates the flow direction of saline-alkali groundwater, and arrow b indicates the delivery direction of calcium hydroxide solution. Figure 1

[0024] Main element symbol explanation

[0025] 1, saline-alkali groundwater delivery pipeline; 2, aeration oxidation tank; 3, aeration disc; 4, air compressor; 5, mixing structure; 6, biological filter tank; 7, water delivery assembly; 8, sedimentation reaction tank; 9, drain pipe.

[0026] The above main element symbol explanation is further explained in detail in combination with the drawings and specific embodiments. Specific embodiments

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will be further described in combination with embodiments. The additional aspects and advantages of the present application will be partly given in the following description, and will become obvious from the following description or be understood through the practice of the present application. It should be understood that the following description is only used to explain the present application, and is not used to limit the present application.

[0028] The specific embodiments of the present application will be described in detail below.

[0029] Please refer to Figures 1-2 The present embodiment provides a saline-alkali groundwater treatment system for mud crab breeding, which comprises a saline-alkali groundwater delivery pipeline 1, an aeration oxidation tank 2, a biological filter tank 6 located at one side of the aeration oxidation tank 2, a water delivery assembly 7 for connecting the biological filter tank 6 and the aeration oxidation tank 2, a sedimentation reaction tank 8 connected with the water delivery assembly and the biological filter tank 6, and a drain pipe 9 connected with the mud crab breeding tank.

[0030] The water inlet of the aeration oxidation tank 2 is connected with the saline-alkali groundwater delivery pipeline 1, and an aeration disc 3 is fixedly installed at a position close to the bottom of the aeration oxidation tank 2. The aeration disc 3 is uniformly provided with a plurality of air nozzles. An air compressor 4 is arranged outside the aeration oxidation tank 2 and is connected with the aeration disc 3 through an air pipe, and the air pipe is fixedly penetrated through the corresponding side wall of the aeration oxidation tank 2.

[0031] A cover plate is arranged on the upper cover of the aeration oxidation tank 2, and a mixing structure 5 is arranged in the aeration oxidation tank 2. The mixing structure 5 is composed of a motor and a stainless steel stirring paddle, the motor is fixedly installed on the cover plate, the stainless steel stirring paddle is fixedly connected at the output end of the motor, and the stainless steel stirring paddle acts on the water in the aeration oxidation tank 2.

[0032] ​In this embodiment, the aquaculture water sent by the saline-alkali groundwater pipeline 1 first enters the aeration oxidation tank 2 for primary treatment. The specific treatment process is as follows: the air compressor 4 compresses air into the aeration disc 3, and the compressed air is uniformly sent into the aquaculture water through the air nozzle to increase the content of dissolved oxygen in the water body. At the same time, the mixed structure 5 stirs the aquaculture water body to make the water body and oxygen mix uniformly to improve the oxidation efficiency and promote the oxidation of ferrous iron to ferric iron in the water body.

[0033] The biological filter 6 is paved with manganese sand filter material, and the manganese sand filter material adsorbs salt-tolerant iron-oxidizing bacteria. The water inlet assembly 7 includes a conduit and a plurality of nozzles fixed on the conduit. The conduit is arranged below the saline-alkali groundwater pipeline 1, and the plurality of nozzles are horizontally arranged in the biological filter 6. In this embodiment, the water inlet assembly 7 sends the primary treated aquaculture water into the biological filter 6 in the form of downflow water distribution, so that the aquaculture water and the manganese sand filter material are uniformly and fully contacted.

[0034] In this embodiment, the aquaculture water treated by the aeration oxidation tank 2 is sent into the biological filter 6 by the water inlet assembly 7, and the dissolved oxygen in the water cooperates with the salt-tolerant iron-oxidizing bacteria to perform secondary oxidation treatment on the aquaculture water body, further oxidizing the ferrous iron in the water body to ferric iron.

[0035] The sedimentation reaction tank 8 is arranged at a position on the side of the biological filter 6 opposite to the aeration oxidation tank 2. Two baffles are vertically and fixedly installed in the sedimentation reaction tank 8, and the two baffles are horizontally arranged, dividing the sedimentation reaction tank 8 into two reaction zones and a filtration zone. In this embodiment, the purpose of arranging the baffles is to reduce the water flow rate to ensure sufficient reaction time.

[0036] The sedimentation reaction tank 8 is fixedly installed with a conical tank connected with the reaction zone at the bottom, and two external pipelines are horizontally arranged at the tank opening for sending calcium hydroxide solution. The two external pipelines respectively face the two reaction zones, and the filtration zone is filled with a filter layer. The filter layer is used to intercept larger particles of precipitates. In this embodiment, the filter layer uses quartz sand and activated carbon, and the activated carbon plays a role in adsorbing iron ions and organic matter in the water to improve water quality.

[0037] In this embodiment, the secondary treated aquaculture water is sent into the sedimentation reaction tank 8 for tertiary treatment, so that the iron ions in the water body are precipitated and separated. The specific treatment process is as follows: the aquaculture water reacts with the sent calcium hydroxide solution, the iron ions are converted into iron hydroxide precipitates, the aquaculture water flows slowly in the horizontal direction, and in the process of flowing, the precipitates settle at the bottom and gather in the conical tank for collection and utilization, and when the aquaculture water flows to the filtration zone, the residual precipitates are further removed by physical adsorption.

[0038] The drain pipe 9 is fixedly connected at the water outlet of the sedimentation reaction tank 8. The content of iron ions in the aquaculture water after three treatments is greatly reduced, and in actual treatment, the content of iron ions in the water at the drain pipe 9 can be determined by means of detection measures such as spectrophotometry, and after the content of iron ions is reduced to the appropriate aquaculture standard, the aquaculture water is discharged into the mud crab aquaculture pond, which is not described here.

[0039] In summary, the water treatment system of the embodiment has the following advantages: a three-stage water treatment system is established, divalent iron ions in the aquaculture water are oxidized into trivalent iron ions, and then the trivalent iron ions are precipitated in the form of precipitates, thereby achieving the effect of reducing the content of iron in saline-alkali water. The whole treatment process has good effect and integrates precipitation generation and separation, and the inconvenience of step-by-step operation is eliminated.

[0040] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A saline-alkali groundwater transportation pipeline (1) for mud crab culture in saline-alkali soil. characterized in that The water treatment system further comprises: an aeration oxidation tank (2) connected to the saline-alkali groundwater transportation pipeline (1) at its water inlet; a biological filter tank (6) located on one side of the aeration oxidation tank (2); a water diversion assembly (7) for connecting the biological filter tank (6) and the aeration oxidation tank (2); a sedimentation reaction tank (8) connected to the biological filter tank (6) through a water diversion pipeline; and a drain pipe (9) fixedly connected to the water outlet of the sedimentation reaction tank (8) and connected to the mud crab culture tank.

2. The system for treating water for mangrove crab culture in saline-alkaline soil according to claim 1, characterized in that, An aeration disc (3) is fixedly installed near the bottom of the aeration oxidation tank (2), and a plurality of air nozzles are uniformly arranged on the aeration disc (3).

3. The system for treating water for mangrove crab culture in saline-alkaline soil according to claim 2, characterized in that, An air compressor (4) is arranged outside the aeration oxidation tank (2) and connected to the aeration disc (3) through an air pipe fixedly penetrating through the corresponding side wall of the aeration oxidation tank (2).

4. The system for treating water for mangrove crab culture in saline-alkaline soil according to claim 1, characterized in that, A cover plate is arranged on the aeration oxidation tank (2), and a mixing structure (5) is arranged inside the aeration oxidation tank (2).

5. The system for treating water for mangrove crab culture in saline-alkaline soil according to claim 4, characterized in that, The mixing structure (5) is composed of a motor and a stainless steel stirring paddle, the motor is fixedly installed on the cover plate, the stainless steel stirring paddle is fixedly connected to the output end of the motor, and the stainless steel stirring paddle acts on the water in the aeration oxidation tank (2).

6. The system for treating water for mangrove crab culture in saline-alkaline soil according to claim 1, characterized in that, Manganese sand filter material is laid in the biological filter tank (6), and salt-tolerant iron-oxidizing bacteria are adsorbed on the manganese sand filter material.

7. The system for treating water for mangrove crab culture in saline-alkaline soil according to claim 1, characterized in that, The water diversion assembly (7) comprises a conduit and a plurality of nozzles fixedly installed on the conduit. The conduit is arranged below the saline-alkali groundwater transportation pipeline (1), and the plurality of nozzles are horizontally arranged in the biological filter tank (6).

8. The system for treating water for mangrove crab culture in saline-alkaline soil according to claim 1, characterized in that, The sedimentation reaction tank (8) is arranged on the side of the biological filter tank (6) away from the aeration oxidation tank (2), and two external pipelines are horizontally arranged at the tank opening of the sedimentation reaction tank (8) for feeding calcium hydroxide solution.

9. The system for treating water for mangrove crab culture in saline-alkaline soil according to claim 8, characterized in that, Two baffles are vertically and fixedly installed in the sedimentation reaction tank (8), the two baffles are horizontally arranged, and the two baffles divide the sedimentation reaction tank (8) into two reaction zones and a filtration zone. The two external pipelines respectively face the two reaction zones, and the filtration zone is filled with a filter layer.

10. The system for treating water for mangrove crab culture in saline-alkaline soil according to claim 9, characterized in that, A conical tank is fixedly installed at the bottom of the sedimentation reaction tank (8) and connected to the reaction zones.

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