A microecological base reaction bed

Abstract

The utility model discloses a kind of micro-ecological base reaction beds, it is related to aquaculture tail water treatment technical field, the micro-ecological base reaction bed includes biological reaction pool and at least one modular filter layer being arranged in the biological reaction pool;The modular filter layer includes organic carbon source type reaction bed module and / or inorganic adsorption type reaction bed module;The organic carbon source type reaction bed module includes first module frame and rice husk filter material filled in the first module frame, a plurality of first water-permeable holes are set on the first module frame;The inorganic adsorption type reaction bed module includes second module frame and porous ceramic filter material filled in the second module frame, a plurality of second water-permeable holes are set on the second module frame.The device not only has basic filtration function, but also can supplement carbon source intelligently, promote specific function microorganism growth, improve aquaculture tail water treatment efficiency, economy and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture wastewater purification technology, specifically to a micro-ecological base reaction bed. Background Technology

[0002] In the treatment of aquaculture wastewater, a low carbon-to-nitrogen ratio (C / N) is a key bottleneck restricting the improvement of denitrification efficiency. To solve this problem, traditional technical solutions usually adopt the method of adding external carbon sources (such as glucose or methanol). However, this method not only significantly increases the operating cost of the treatment system, but also increases the complexity of operation, and poses a risk of causing secondary pollution, making it difficult to meet the requirements of economical, environmentally friendly and efficient treatment.

[0003] The filter media layers used in existing biological filters, such as ceramsite and quartz sand layers, have relatively limited functions. Their main role is limited to physically removing impurities from the water and providing a biofilm carrier for microorganisms, and they cannot effectively regulate the carbon-nitrogen ratio of the water. Furthermore, these traditional filter media layers are prone to clogging during long-term use, requiring frequent backwashing to restore their filtration function. This not only increases maintenance workload but may also affect the continuous operation of the treatment system. In addition, the replacement of filter media is inconvenient, further reducing the operating efficiency and practicality of the treatment system. Utility Model Content

[0004] In view of this, the primary objective of this utility model is to overcome the aforementioned defects of the prior art and provide a micro-ecological base reaction bed, so as to at least solve the problems of high carbon source replenishment cost, easy secondary pollution, single function, easy clogging, and inconvenient maintenance and replacement of the filter media layer for aquaculture wastewater treatment in the prior art.

[0005] To address the aforementioned issues, the primary objective of this invention is to provide a micro-ecological-based reaction bed, comprising a bioreactor and at least one modular filter media layer disposed within the bioreactor. The modular filter media layer includes an organic carbon source reaction bed module and / or an inorganic adsorption reaction bed module; The organic carbon source type reaction bed module includes a first module frame and rice husk filter material filled in the first module frame. The first module frame is provided with a plurality of first water-permeable holes. The inorganic adsorption reaction bed module includes a second module frame and porous ceramic filter media filled in the second module frame. The second module frame has a plurality of second water-permeable holes.

[0006] Preferably, the first module frame is made of plastic or stainless steel, the diameter of the first water-permeable hole is 2-5mm, and the first water-permeable holes are evenly distributed on the first module frame.

[0007] Preferably, the particle size of the rice husk filter material is 1-3 mm.

[0008] Preferably, the material of the second module frame is plastic or stainless steel, the diameter of the second water-permeable hole is 1-3mm, and the second water-permeable hole is evenly distributed on the second module frame.

[0009] Preferably, the porous ceramsite filter media has a particle size of 3-8 mm and a porosity of 40%-60%.

[0010] Preferably, at least one organic carbon source reaction bed module and at least one inorganic adsorption reaction bed module are sequentially arranged along the water flow direction in the bioreactor.

[0011] Preferably, both the first module frame and the second module frame are provided with a hoisting structure at their top. The hoisting structure is a lifting ring or a lifting lug, and the lifting ring or lifting lug is either integrally formed with the first module frame or detachably connected to the second module frame.

[0012] Preferably, the first module frame is further provided with a plurality of first partition plates, which divide the internal space of the first module frame into a plurality of independent first filling cavities, each of which is filled with rice husk filter material.

[0013] Preferably, the second module frame is further provided with a plurality of second partition plates, which divide the internal space of the second module frame into a plurality of independent second filling cavities, each of which is filled with porous ceramic filter media.

[0014] Preferably, it also includes an aeration module, which includes a blower and an aeration pipe laid at the bottom of the bioreactor. The aeration pipe is connected to multiple aeration ports. The blower is adapted to introduce air into the aeration pipe, and the air is sprayed out from the bottom of the bioreactor through the aeration ports.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects: 1. The micro-ecological reaction bed in this invention, through the setting of an organic carbon source reaction bed module and an inorganic adsorption reaction bed module, innovatively upgrades the traditional "passive filtration" function of the filter media layer to an "active regulation" micro-ecological reaction function. The organic carbon source reaction bed module can simultaneously achieve the triple functions of physical filtration, carbon source replenishment, and diatom growth promotion; the inorganic adsorption reaction bed module can simultaneously achieve the triple functions of physical filtration, phosphorus adsorption, and microbial biofilm formation, effectively enriching the functions of the filter media layer and improving the treatment effect on aquaculture wastewater.

[0016] 2. The organic carbon source-type reaction bed module uses rice husks as filter media. Rice husks, as agricultural waste, are widely available and inexpensive. They have a high carbon content and can slowly degrade in water, continuously releasing organic carbon. This provides a stable and economical endogenous carbon source for denitrifying bacteria in the treatment system, fundamentally solving the problem of low carbon-to-nitrogen ratio in aquaculture wastewater. This "waste-to-waste" approach significantly reduces operating costs, saving over 80% of the cost of purchased carbon sources. Furthermore, the degradation process of rice husks is ecologically safe and will not cause secondary pollution.

[0017] 3. The organic carbon released by the organic carbon source reaction bed module can directly provide nutrients for denitrifying bacteria, promote denitrification, and thus effectively improve nitrogen removal efficiency. On the other hand, the silicon element rich in rice husks can provide essential nutrients for the growth and reproduction of diatoms, which helps to build a symbiotic system of bacteria and algae with diatoms as the dominant species. Diatoms can absorb a large amount of nitrogen from the water. At the same time, the porous ceramic filter media in the inorganic adsorption reaction bed module has a specific adsorption effect on phosphate ions, which can effectively reduce the phosphorus content in the water. Through the above-mentioned synergistic effects, the nitrogen and phosphorus removal efficiency of the entire treatment system is significantly enhanced.

[0018] 4. Both the organic carbon source type and inorganic adsorption type reaction bed modules adopt a standardized modular frame design, and the top of the module frame can be equipped with a hoisting structure, making the replacement, cleaning, and maintenance of the filter media extremely convenient. When maintenance is required, there is no need to shut down the biological reactor for cleaning; the module can be removed for operation simply by hoisting, greatly reducing labor intensity, minimizing system downtime, and ensuring the continuity and stability of the treatment project. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the microecological base reaction bed in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the microecological base reaction bed in Embodiment 2 of this utility model; Figure 3 This is a schematic diagram of the microecological base reaction bed in Embodiment 3 of this utility model.

[0020] Explanation of reference numerals in the attached figures: 1-Biological reactor; 2-Organic carbon source type reaction bed module; 21-First module frame; 22-Rice husk filter media; 23-First water permeable hole; 24-First partition plate; 25-First filling cavity; 3-Inorganic adsorption type reaction bed module; 31-Second module frame; 32-Porous ceramsite filter media; 33-Second water permeable hole; 34-Second partition plate; 35-Second filling cavity; 4-Lifting lug; 5-Lifting ring; 6-Aeration module; 61-Blower; 62-Aeration pipe; 621-Aeration port. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The terms “upper,” “lower,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Example 1 like Figure 1 As shown, Example 1 provides a micro-ecological-based reaction bed, which includes a biological reaction tank 1 and two modular filter media layers disposed within the biological reaction tank 1, and arranged along the water flow direction ( Figure 1 (As indicated by the middle arrow) are, in order, organic carbon source type reaction bed module 2 and inorganic adsorption type reaction bed module 3.

[0024] The organic carbon source reaction bed module 2 includes a first module frame 21 and rice husk filter media 22 filled in the first module frame 21. The first module frame 21 is made of polypropylene plastic, which is corrosion resistant and lightweight. The first module frame 21 is provided with a number of first water permeable holes 23. The diameter of the first water permeable holes 23 is 3mm, and the first water permeable holes 23 are evenly distributed on the four sides and bottom of the first module frame 21 to ensure that water can pass through the module smoothly, while preventing leakage of rice husk filter media 22.

[0025] The micro-ecological base reaction bed also includes an aeration module 6, which includes a blower 61 and an aeration pipe 62 laid at the bottom of the biological reaction tank 1. The aeration pipe 62 is connected to multiple aeration ports 621. The blower 61 is adapted to introduce air into the aeration pipe 62, and the air is sprayed out from the bottom of the biological reaction tank 1 through the aeration ports 621.

[0026] The rice husk filter media 22 undergoes pretreatment, which is as follows: First, the rice husks are soaked in clean water and stirred to remove surface dirt, impurities, etc.; then, the washed rice husks are placed in a drying device and dried at 80-90℃ until the moisture content is below 15%; finally, the dried rice husks are placed in a pulverizer to be pulverized, and the particle size of the pulverized rice husk filter media is controlled to be about 2mm. This particle size is beneficial to ensure the air permeability and water permeability of the rice husk filter media, and also ensures that it has sufficient specific surface area to realize the carbon source release and filtration functions.

[0027] The inorganic adsorption reaction bed module 3 includes a second module frame 31 and porous ceramic filter media 32 filled in the second module frame 31. The material of the second module frame 31 is also polypropylene plastic. The second module frame 31 is provided with a number of second water permeable holes 33. The pore diameter of the second water permeable holes 33 is 2mm, and they are evenly distributed on the four sides and bottom of the second module frame 31 to ensure water flow while preventing the porous ceramic filter media 32 from falling off.

[0028] The porous ceramic filter media 32 has a particle size of 5mm and a porosity of 50%. This porosity allows the porous ceramic particles to have good adsorption performance, effectively adsorbing phosphate ions in the water, and also provides sufficient attachment space for microorganisms such as nitrifying bacteria and denitrifying bacteria, which is conducive to microbial biofilm formation and thus further enhances the degradation capacity of pollutants.

[0029] To facilitate the hoisting and maintenance of the modules, two lifting lugs 4 are welded to the top of both the first module frame 21 and the second module frame 31. The lifting lugs 4 are symmetrically arranged to ensure that the modules are subjected to uniform force during hoisting and to avoid tilting.

[0030] In this embodiment, the micro-ecological-based reaction bed is used so that the aquaculture wastewater enters from the inlet of the biological reaction tank 1 and first flows through the organic carbon source type reaction bed module 2. In this module, the rice husk filter media 22 removes suspended solids, colloids and other pollutants from the water through physical filtration; at the same time, the rice husk slowly degrades and releases organic carbon, providing a carbon source for denitrifying bacteria, promoting denitrification and achieving nitrogen removal; in addition, the silicon in the rice husk dissolves into the water, providing nutrients for diatom growth, and the diatoms further absorb nitrogen from the water.

[0031] After being treated by the organic carbon source reaction bed module 2, the effluent continues to flow through the inorganic adsorption reaction bed module 3. The porous ceramic filter media 32 further intercepts the tiny particulate matter in the water through physical filtration. At the same time, the porous ceramic adsorbs phosphate ions in the water to achieve phosphorus removal. Furthermore, the micropores on the surface and inside of the porous ceramic provide a place for microorganisms to attach. After the microorganisms attach to the biofilm, they further degrade the pollutants in the water. Finally, the treated effluent is discharged from the outlet of the biological reaction tank 1.

[0032] When the filter media needs to be replaced or cleaned, the organic carbon source reaction bed module 2 or the inorganic adsorption reaction bed module 3 is removed from the biological reaction tank 1 by hooking the lifting lug 4 with the hoisting equipment for filter media replacement or cleaning. After the operation is completed, the module is hoisted back into the biological reaction tank 1. The whole process does not require stopping the tank for cleaning, ensuring the continuity of treatment.

[0033] Example 2 like Figure 2 As shown, Example 2 provides a micro-ecological-based reaction bed, which differs from Example 1 in that: the biological reaction tank 1 is equipped with only one organic carbon source type reaction bed module 2, which is suitable for aquaculture wastewater scenarios with extremely low carbon-to-nitrogen ratios and where the main needs are to supplement carbon sources and remove suspended solids.

[0034] The first module frame 21 is made of 304 stainless steel, which has stronger strength and corrosion resistance and a longer service life; the first water-permeable hole 23 has a diameter of 5mm, which is suitable for situations where suspended particles in the water are large, and can reduce pore blockage.

[0035] In the pretreatment of rice husk filter media 22, the particle size of the crushed particles is 3mm, and a number of first partition plates 24 are provided in the first module frame 21. The first partition plates 24 divide the internal space of the first module frame 21 into 4 independent first filling cavities 25. Each first filling cavity is filled with rice husk filter media 22. This partition structure can prevent the rice husk filter media from accumulating under the action of water flow, ensure the uniformity of the filter media layer, and improve the filtration and carbon source release effect.

[0036] The lifting lug 4 at the top of the first module frame 21 is a detachable connection structure with the first module frame 21. The lifting lug 4 is connected to the first module frame 21 by bolts. When hoisting is not required, the lifting lug 4 can be removed to avoid occupying space or being damaged.

[0037] Example 3 like Figure 3As shown, Example 3 provides a micro-ecological-based reaction bed, which differs from Example 1 in that: two organic carbon source type reaction bed modules 2 and one inorganic adsorption type reaction bed module 3 are arranged sequentially along the water flow direction in the biological reaction tank 1. It is suitable for aquaculture wastewater scenarios with extremely low carbon-nitrogen ratio and high phosphorus content. By increasing the number of organic carbon source type reaction bed modules, the carbon source replenishment and suspended solids removal effect are further improved.

[0038] The second module frame 31 is made of 304 stainless steel, and the second water permeable hole 33 has a pore diameter of 1mm, which is suitable for situations where there are many small particles in the water and can improve the filtration accuracy.

[0039] The porous ceramsite filter media 32 has a particle size of 3mm and a porosity of 60%, resulting in a larger specific surface area, better adsorption performance, and better microbial biofilm formation. Furthermore, the second module frame 31 is provided with several second partition plates 34, which divide the internal space of the second module frame 31 into three independent second filling cavities 35. Each second filling cavity 35 is filled with porous ceramsite filter media 32, which can prevent the porous ceramsite filter media from accumulating and ensure the uniformity and permeability of the filter media layer.

[0040] The lifting structure set at the top of the second module frame 31 is the lifting ring 5. The lifting ring 5 and the second module frame 31 are integrally formed, which has higher strength and more stable lifting process.

[0041] It should be noted that the above embodiments are only preferred embodiments of this utility model. In practical applications, the number of modules, materials, filter media parameters, water permeability parameters, etc. can be adjusted according to specific needs. As long as they conform to the technical solutions defined in the claims of this utility model, they all fall within the protection scope of this utility model.

[0042] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A microecological-based reaction bed, characterized in that, It includes a bioreactor (1) and at least one modular filter media layer disposed within the bioreactor (1); The modular filter media layer includes an organic carbon source type reaction bed module (2) and / or an inorganic adsorption type reaction bed module (3). The organic carbon source type reaction bed module (2) includes a first module frame (21) and rice husk filter material (22) filled in the first module frame (21). The first module frame (21) has a plurality of first water-permeable holes (23). The inorganic adsorption type reaction bed module (3) includes a second module frame (31) and a porous ceramic filter material (32) filled in the second module frame (31). The second module frame (31) has a plurality of second water-permeable holes (33).

2. The microecological-based reaction bed according to claim 1, characterized in that, The first module frame (21) is made of plastic or stainless steel, the diameter of the first water-permeable hole (23) is 2-5mm, and the first water-permeable hole (23) is evenly arranged on the first module frame (21).

3. The microecological-based reaction bed according to claim 1, characterized in that, The particle size of the rice husk filter material (22) is 1-3 mm.

4. The microecological-based reaction bed according to claim 1, characterized in that, The material of the second module frame (31) is plastic or stainless steel, the diameter of the second water-permeable hole (33) is 1-3mm, and the second water-permeable hole (33) is evenly arranged on the second module frame (31).

5. The microecological-based reaction bed according to claim 4, characterized in that, The porous ceramic filter media (32) has a particle size of 3-8 mm and a porosity of 40%-60%.

6. The microecological-based reaction bed according to claim 4, characterized in that, The bioreactor (1) is provided with at least one organic carbon source type reaction bed module (2) and at least one inorganic adsorption type reaction bed module (3) arranged sequentially along the water flow direction.

7. The microecological-based reaction bed according to claim 1, characterized in that, The top of the first module frame (21) and the second module frame (31) are provided with a hoisting structure, which is a hoisting ring (5) or a hoisting lug (4), and the hoisting ring (5) or the hoisting lug (4) is an integrally formed structure or a detachable connection structure with the first module frame (21) and the second module frame (31).

8. The microecological-based reaction bed according to claim 1, characterized in that, The first module frame (21) is also provided with a number of first partition plates (24). The first partition plates (24) divide the internal space of the first module frame (21) into a number of independent first filling cavities (25). Each first filling cavity (25) is filled with rice husk filter material (22).

9. The microecological-based reaction bed according to claim 8, characterized in that, The second module frame (31) is also provided with several second partition plates (34), which divide the internal space of the second module frame (31) into several independent second filling cavities (35), and each second filling cavity (35) is filled with porous ceramic filter material (32).

10. The microecological-based reaction bed according to claim 1, characterized in that, It also includes an aeration module (6), which includes a blower (61) and an aeration pipe (62) laid at the bottom of the bioreactor (1). The aeration pipe (62) is connected to a plurality of aeration ports (621). The blower (61) is adapted to introduce air into the aeration pipe (62), and the air is sprayed out from the bottom of the bioreactor (1) through the aeration ports (621).

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