Mariculture tail water treatment system

Abstract

The utility model discloses a mariculture tail water treatment system which comprises a pretreatment pond capable of treating mariculture tail water through a physical method, and further comprises a microorganism purification pond and an ecological base purification pond, and the pretreatment pond, the microorganism purification pond and the ecological base purification pond are sequentially communicated, a microorganism expanding culture bin which is used for culturing and domesticating and can be used for partially putting microorganisms is arranged in the microorganism purification pond, and aquatic plants are planted in the ecological base purification pond. The device has the advantages of low cost and good treatment effect.

Description

Technical Field

[0001] The utility model relates to the technical field of tail water treatment, in particular to a seawater aquaculture tail water treatment system. Background Art

[0002] The treatment of marine aquaculture effluent has always been one of the biggest constraints on the green and high-quality development of the marine aquaculture industry, and it has an important impact on the prevention and control of marine pollution and the improvement of the economic benefits of marine aquaculture.

[0003] At present, the main technologies for treating tailwater from marine aquaculture include the following:

[0004] 1. Physical treatment method: It is the most in-depth research and widely used method for treating marine aquaculture tailwater. It is used to remove solid suspended particles, bacteria, viruses and other substances in aquaculture tailwater. It mainly includes filtration, sedimentation, foam separation and other methods. Physical methods are effective in removing suspended particles and a small amount of organic matter in tailwater, but have little effect on removing soluble nitrogen, phosphorus and inorganic salts.

[0005] 2. Chemical treatment methods: Remove harmful pollutants from aquaculture water through chemical reactions such as flocculation precipitation and oxidation-reduction, including electrochemical technology, ozone oxidation, flocculation sedimentation, chemical oxidation-reduction, potassium permanganate disinfection, chlorine oxidation disinfection, chemical neutralization, etc. Although some traditional chemical treatment methods purify aquaculture water, they are prone to secondary pollution and are not suitable for large-scale promotion and application.

[0006] 3. Biological treatment method: Purify water quality by assimilating, absorbing and metabolizing nutrients and organic matter in wastewater. Compared with the above physical and chemical methods, biological treatment methods have low investment costs and are not prone to secondary pollution. However, conventional microorganisms used to purify water quality, such as nitrifying bacteria and heterotrophic bacteria, have their own most suitable living environment. When the water quality environment is different from its suitable environment, the growth of microorganisms will be inhibited and the treatment effect will be affected. Therefore, before treating aquaculture water, it is necessary to use corresponding aquaculture water to cultivate and domesticate microbial strains so that these microorganisms can adapt to this condition before treating their pollutants.

[0007] 4. Plant treatment technology: Aquatic plants are used for photosynthesis to assimilate and absorb nitrogen, phosphorus nutrients and carbon dioxide in the tail water of aquaculture. While purifying the tail water, plants can be harvested and oxygen-rich aquaculture water can be obtained. However, when the concentration of nutrients in the tail water of seawater aquaculture is at a low level, the absorption rate of nutrients by aquatic plants decreases significantly.

[0008] At present, biological treatment technology is the main method for purifying marine aquaculture tail water at home and abroad. However, the salinity of marine aquaculture tail water is as high as 30-40‰, which is far beyond the suitable growth conditions of ordinary microorganisms and has a strong inhibitory effect on microorganisms. There are two conventional methods for treating such water: 1. Use marine aquaculture tail water to cultivate and domesticate ordinary bacteria before use. The domestication process generally includes the venting stage and the domestication stage. Among them, the venting stage is completely water-free, that is, only aeration without water, so that microorganisms can adapt to such water. The domestication stage is a long process. The amount of water is gradually increased. The proportion of water increase and the duration are determined according to the actual situation. The cycle is extremely long, and the number of surviving microorganisms is extremely small; 2. Add salt-tolerant bacteria to the marine aquaculture tail water, so that the salt-tolerant bacteria are directly cultivated and domesticated in the treatment pool. This method is more effective than the first one and can shorten the cultivation and domestication cycle to a certain extent, but it requires long-term purchase and addition, and the operating cost is high.

[0009] How to solve the above problems has become a technical problem that needs to be solved urgently. Utility Model Content

[0010] The utility model aims to provide a seawater aquaculture tail water treatment system with low cost and good treatment effect.

[0011] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0012] The utility model provides a seawater aquaculture tailwater treatment system, comprising a pretreatment pool capable of treating seawater aquaculture tailwater by physical methods, and also comprising a microbial purification pool and an ecological-based purification pool, wherein the pretreatment pool, the microbial purification pool and the ecological-based purification pool are sequentially connected, wherein the microbial purification pool is provided with a microbial expansion and cultivation warehouse for cultivating and domesticating microorganisms and capable of partially placing microorganisms, and aquatic plants are planted in the ecological-based purification pool.

[0013] Furthermore, the microbial expansion and cultivation chamber includes an acclimation zone and a release zone, wherein the acclimation zone and the release zone are connected by a transfer device and a water inlet is provided on the acclimation zone, and the release zone is connected to the microbial purification pool through a water outlet, and the water outlet is used to continuously output microorganisms to the microbial purification pool.

[0014] Furthermore, it also includes a photovoltaic oxygenation pool, which is connected to the ecological-based purification pool and is provided with a photovoltaic oxygenation aerator.

[0015] Furthermore, the pretreatment tank and the microbial purification tank, the ecological-based purification tank and the photovoltaic oxygenation tank are connected through a guide wall, and the microbial purification tank and the ecological-based purification tank are connected through a ditch or a pipeline.

[0016] Furthermore, the microbial purification pool is also provided with a microbial base bed for microorganism fixation and a micro-nano aerator for providing oxygen to the microorganisms. The microbial purification pool and the microbial expansion tank are both connected to the output end of the micro-nano aerator, and the ecological base purification pool is also provided with an ecological base.

[0017] Due to the adoption of the above structure, the utility model has the following beneficial effects:

[0018] The utility model is provided with a pretreatment pool, a microbial purification pool and an ecological-based purification pool, so that the marine aquaculture tail water can be treated by combining the three methods of physical method, microbial degradation and aquatic plant absorption, and the treatment effect is good. In the stage of cultivating and domesticating the microbial strains, only a part of the domesticated microorganisms are put in for the marine aquaculture tail water treatment, and the other part of the microorganisms are retained for continued cultivation and domestication, so that the cultivation and domestication of the microorganisms and the use of the microorganisms for the treatment of the tail water can be carried out at the same time. While cultivating and domesticating the microorganisms, the microorganisms required for the treatment of the marine aquaculture tail water can be continuously provided, and the cost is effectively reduced while the treatment efficiency is improved.

[0019] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Please refer to Figure 1The utility model provides a seawater aquaculture tailwater treatment system, including a pretreatment tank capable of treating seawater aquaculture tailwater by physical methods. In the utility model, the physical method is a sedimentation method, and other physical methods such as filtration and foam separation can also be used to preliminarily treat the seawater aquaculture tailwater; it also includes a microbial purification tank and an ecological-based purification tank, and the pretreatment tank, the microbial purification tank, and the ecological-based purification tank are connected in sequence, wherein the microbial purification tank is provided with a microbial expansion and cultivation warehouse for cultivating and domesticating and partially placing microorganisms, and aquatic plants are planted in the ecological-based purification tank. The microbial expansion and cultivation warehouse is used to cultivate and domesticate a large number of salt-tolerant microorganisms, and the cultivation and domestication cycle is short, so as to continuously provide the microbial purification tank with microorganisms with strong salt tolerance and high activity to ensure the treatment effect. The microbial expansion and cultivation warehouse can also be used to cultivate and domesticate common microbial strains, which can save costs.

[0024] In the utility model, the microorganism expansion culture chamber includes an acclimation area and a release area, wherein the acclimation area and the release area are connected by a transfer device and a water inlet is provided on the acclimation area, and the water inlet is used to inject water into the acclimation area; the transfer device is a valve, a water pump or other openable and closable device, which can make the microorganisms in the acclimation area flow to the release area in one direction, so that part of the acclimated microorganisms can remain in the acclimation area, and the other part enters the release area for storage; the release area is connected to the microorganism purification pool through a water outlet, and the water outlet is used to continuously output microorganisms to the microorganism purification pool, so that the microorganisms can continuously treat the seawater aquaculture tail water. The microorganism expansion and cultivation warehouse adopts a three-stage culture and domestication of microorganisms. For example, in the first stage, the seawater aquaculture tail water enters the domestication area through the water inlet to 1 / 6 of the volume of the domestication area, the second stage enters water to 1 / 3 of the volume of the domestication area, and the third stage enters water to the entire volume of the domestication area. The interval time of each water inlet is 8-24 hours, so that the microorganisms gradually adapt to the seawater aquaculture tail water and grow and reproduce in large quantities. After that, the domesticated microorganisms are partially transferred to the release area through the transfer device, and 1 / 15 to 1 / 25 of the microorganisms are retained in the domestication area for the next round of culture and domestication, so that the microorganisms can be continuously output to the microbial purification pool without the need to re-add microbial strains.

[0025] The utility model also includes a photovoltaic oxygenation pool, which is connected to the ecological base purification pool and is provided with a photovoltaic oxygenation aerator to provide sufficient dissolved oxygen for aquatic plants.

[0026] In the utility model, the pretreatment pool and the microbial purification pool, the ecological-based purification pool and the photovoltaic oxygenation pool are connected through a guide wall, and the microbial purification pool and the ecological-based purification pool are connected through a ditch or a pipeline.

[0027] In the utility model, the microbial purification pool is also provided with a microbial base bed for microorganisms to fixate and a micro-nano aerator for providing oxygen to the microorganisms. The microbial purification pool and the microbial expansion and cultivation chamber are both connected with the output end of the micro-nano aerator. The microbial base bed is a base bed for microorganisms in water to increase the growth and reproduction of a large number of microorganisms, and can intercept and store a large number of microorganisms in the microbial purification pool under the impact of large flow. The micro-nano aerator provides oxygen for the microorganisms, and the micro-nano bubbles have a large specific surface area, a long residence time, self-dissolution and pressurization, and a high mass transfer efficiency, which can stably increase the dissolved oxygen content in the water and promote the enhancement of the metabolic capacity of the microorganisms. In addition, the ecological base purification pool is also provided with an ecological base for the attachment and planting of aquatic plants.

[0028] When the utility model is in use, the seawater aquaculture tail water is first collected through the drainage facilities and then discharged into the pretreatment pool. After the initial buffering and sedimentation in the pretreatment pool, the seawater aquaculture tail water enters the microbial purification pool. The microbial expansion chamber puts a part of the domesticated microorganisms into the microbial purification pool. The microbial flora attaches to the microbial base bed to grow and reproduce, and at the same time degrades the organic matter and nitrogen and phosphorus pollutants in the aquaculture tail water. Subsequently, the seawater aquaculture tail water flows into the ecological base purification pool, and is further absorbed and purified by the aquatic plants planted on the ecological base, so that the seawater aquaculture tail water meets the discharge standard.

[0029] The above describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the above-mentioned specific implementation methods, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the utility model without departing from the scope of the technical solution of the utility model, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A marine aquaculture tail water treatment system, comprising a pretreatment tank capable of treating marine aquaculture tail water by physical methods; characterized in that: It also includes a microbial purification pool and an ecological-based purification pool. The pretreatment pool, the microbial purification pool, and the ecological-based purification pool are connected in sequence. The microbial purification pool is provided with a microbial expansion tank for cultivating and domesticating microorganisms and capable of partially placing microorganisms. Aquatic plants are planted in the ecological-based purification pool.

2. A marine aquaculture tailwater treatment system according to claim 1, characterized in that: The microorganism expansion and cultivation chamber includes an acclimation area and a release area, wherein the acclimation area and the release area are connected by a transfer device and a water inlet is provided on the acclimation area, and the release area is connected to the microorganism purification pool through a water outlet, and the water outlet is used to continuously output microorganisms to the microorganism purification pool.

3. A marine aquaculture tailwater treatment system according to claim 1, characterized in that: It also includes a photovoltaic oxygenation pool, which is connected to the ecological base purification pool and is provided with a photovoltaic oxygenation aerator.

4. A marine aquaculture tailwater treatment system according to claim 3, characterized in that: The pretreatment pool is connected to the microbial purification pool, the ecological purification pool is connected to the photovoltaic oxygenation pool through a guide wall, and the microbial purification pool is connected to the ecological purification pool through a ditch or a pipeline.

5. A marine aquaculture tailwater treatment system according to any one of claims 1 to 4, characterized in that: The microbial purification pool is also provided with a microbial base bed for microorganism fixation and a micro-nano aerator for providing oxygen to the microorganisms. The microbial purification pool and the microbial expansion and cultivation chamber are both connected to the output end of the micro-nano aerator, and the ecological base purification pool is also provided with an ecological base.

Images