Microbial porous activated carbon carrier

Abstract

The utility model discloses a kind of microbial porous activated carbon carriers, including cubic carrier, the cubic carrier is formed by several evenly distributed independent carrier structures, the inside of several independent carrier structures is fixedly provided with elastic culture structure, the opening direction of elastic culture structure corresponds with the opening direction of independent carrier structure, a kind of microbial porous activated carbon carrier of the utility model, multi-scale gap in carrier and elasticity are cooperated, through the slot of independent cubic carrier, the splicing interface of hexagonal splicing plate, the micropore of activated carbon coating forms the tertiary porous structure of " macroscopic channel-mesoporous pore-microscopic adsorption site", material transmission efficiency and microbial adhesion area are considered, cooperate the dynamic buffer design of elastic culture structure, solve the problem that biofilm is easy to fall off under water flow impact in traditional rigid carrier, improve the stability of system operation.

Description

Technical Field

[0001] This utility model relates to the field of activated carbon technology, specifically to a microbial porous activated carbon carrier. Background Technology

[0002] Microbial porous activated carbon carriers are activated carbon materials with porous structures, mainly used to support microorganisms and provide a place for microorganisms to attach, grow and reproduce. They are widely used in environmental remediation, biochemical engineering and other fields and are of great significance.

[0003] A search revealed a Chinese patent document disclosing a plate-shaped activated carbon catalyst support (publication number: CN200998666Y), comprising a substrate, with a layer of powdered activated carbon coated on one or both sides of the substrate using a high-temperature adhesive layer, or the substrate and the powdered activated carbon layer are pressed together using powdered activated carbon containing 15%-40% phenolic resin or furan resin to form an integral plate-shaped support. A fixed frame is added to the outer periphery of the plate-shaped support. The specific surface area of ​​the activated carbon is 800-1200 m² / g, and the diameter of the powdered activated carbon is less than 200 mesh. This invention prepares powdered activated carbon into a plate-shaped structure for loading SCR catalysts. The plate-shaped SCR system is easy to arrange and has low system resistance. The plate catalyst can be arranged parallel to the flue gas flow direction or at a certain angle to the flue gas flow direction. The activated carbon support prepared in this way can be loaded with catalysts using impregnation or sol-gel methods, and can be applied to the catalytic reduction denitrification of nitrogen oxides in boiler flue gas. However, it still has many shortcomings:

[0004] This type of activated carbon catalyst support has differences in structure and mass transfer efficiency. It is only a plate structure with a substrate and a layer of powdered activated carbon. It lacks multi-scale pore design and cannot form a multi-level mass transfer channel from macro to micro. This results in low mass transfer efficiency, limited microbial attachment area, and difficulty in meeting the survival needs of diverse microorganisms. Furthermore, the activated carbon layer is pressed by high-temperature adhesive or resin, which can easily clog the micropores of activated carbon, reduce the effective utilization rate of its specific surface area, weaken adsorption performance, and the interface bonding is not strong, making the activated carbon coating easy to fall off.

[0005] The support of this type of activated carbon catalyst is a rigid structure. When impacted by water flow or vibrated by the system, the biofilm is easily detached due to shear force, resulting in poor structural stability. Furthermore, the biofilm is prone to clogging the pores after aging, requiring frequent manual maintenance, resulting in a short service life. It is difficult to provide a suitable living environment, cannot meet the activity requirements of microorganisms with different metabolic types, has poor functional scalability, and a limited range of applications. Utility Model Content

[0006] The purpose of this invention is to provide a microbial porous activated carbon carrier to solve the problems of the activated carbon catalyst carriers mentioned in the background art, which have differences in structure and mass transfer efficiency. They are only plate structures with a substrate and a powdered activated carbon layer, lacking multi-scale pore design and unable to form multi-level mass transfer channels from macro to micro, resulting in low mass transfer efficiency, limited microbial attachment area, and difficulty in meeting the survival needs of diverse microorganisms. Furthermore, the activated carbon layer is pressed by high-temperature adhesive or resin, which easily clogs the micropores of activated carbon, reduces the effective utilization rate of its specific surface area, weakens adsorption performance, and the interface bonding is not strong, making the activated carbon coating easy to fall off.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a microbial porous activated carbon carrier, comprising an integrated cubic carrier, wherein the integrated cubic carrier is composed of several uniformly distributed independent carrier structures, and each of the several independent carrier structures has an elastic culture structure fixedly arranged inside, wherein the opening direction of the elastic culture structure corresponds to the opening direction of the independent carrier structure.

[0008] Preferably, the independent carrier structure includes an independent cubic carrier. The outer surface of the independent cubic carrier has several evenly distributed corner rectangular slots, and the middle of the outer surface has a central rectangular slot. The rectangular slot design expands the geometric space of the carrier surface through its concave-convex structure, increasing the microbial attachment area and improving the microbial load per unit volume. Simultaneously, the channels formed by the corner and central rectangular slots promote the flow and diffusion of wastewater, nutrients, and metabolic products, preventing localized material accumulation, ensuring sufficient contact between microorganisms and substrate, improving pollutant degradation efficiency, and enhancing structural permeability, which facilitates gas transport and provides a sufficient living environment for aerobic microorganisms. It also promotes the discharge of anaerobic microbial metabolic products, maintaining the activity balance of the microbial community. The slots at different locations can create microenvironmental differences, adapting to the growth needs of different types of microorganisms and constructing a diverse microbial ecosystem.

[0009] Preferably, the independent cubic carrier is made of stainless steel, and the surface of the independent cubic carrier is coated with a powdered activated carbon coating. Stainless steel has the characteristics of corrosion resistance and impact resistance, and can maintain structural stability in complex environments such as sewage and exhaust gas, avoiding carrier damage that could lead to the loss of microorganisms and extending service life. The powdered activated carbon coating, with its porous structure and high specific surface area, can quickly adsorb pollutants such as organic matter and heavy metals in the water, forming a synergistic effect of "adsorption-microbial degradation" and improving treatment efficiency.

[0010] Preferably, the elastic culture structure includes a cubic support frame, with a fixing bead fixedly installed at each corner of the cubic support frame, and arc-shaped springs fixedly connected to the four corners at both ends of the cubic support frame. A transmission frame is fixedly connected to the other end of each of the arc-shaped springs. The elastic design of the arc-shaped springs can absorb energy under conditions such as water flow fluctuations and equipment vibrations, reducing the deformation of the carrier structure, preventing microorganisms from falling off due to mechanical stress, and maintaining the integrity of the biofilm. The elastic structure allows the carrier to accommodate microorganisms of different volumes, or allows microorganisms to grow and reproduce freely, resulting in biofilm thickening. The spring deformation provides a certain expansion space, preventing excessive compression of the biofilm that could lead to microbial death, thus expanding the survival range of the microorganisms. The combination of the cubic support frame and the transmission frame forms a three-dimensional mesh structure, ensuring mechanical stability while providing a three-dimensional growth space for microorganisms and increasing the biomass per unit volume.

[0011] Preferably, one end of each of the several transmission frames is rotatably connected to one side of a several fixed beads, and the other end of each of the several transmission frames is fixedly connected to a hexagonal splicing plate. Several evenly distributed rectangular splicing interfaces are formed between the several hexagonal splicing plates, and the positions of the rectangular splicing interfaces correspond to the positions of the corner rectangular slots. The correspondence between the rectangular splicing interfaces and the corner slots forms a through channel from the outside to the inside of the carrier, accelerating the transfer of nutrients and oxygen to the internal microorganisms, while promoting the discharge of metabolic products and avoiding the formation of "dead zones." The hexagonal splicing plates can achieve detachable connection of multiple independent carriers through the splicing interfaces, facilitating adjustments to the carrier combination according to processing needs, improving the flexibility of system design. Furthermore, the regular arrangement of the hexagonal splicing plates forms a uniform porous structure, which can guide microorganisms to form an orderly community distribution inside the carrier, enhancing synergistic metabolic capabilities.

[0012] Preferably, the hexagonal splicing plate is made of stainless steel, and its surface is coated with a powdered activated carbon coating. The powdered activated carbon has a diameter of less than 200 mesh and a specific surface area of ​​800-1200 m² / g. The powdered activated carbon with a particle size of less than 200 mesh has a finer particle size and a larger specific surface area, which can quickly adsorb small molecule pollutants, enhance adsorption performance and mass transfer efficiency, and shorten the reaction cycle of microbial degradation. At the same time, the activated carbon coating with a high specific surface area provides more microscopic attachment sites for microorganisms. In particular, the microporous structure can adsorb extracellular polymers secreted by microorganisms, enhance the binding force between the biofilm and the carrier. The stainless steel hexagonal splicing plate coated with powdered activated carbon not only ensures structural strength but also improves treatment performance through the adsorption-catalysis function of activated carbon, realizing the dual functions of "carrier support" and "pollution treatment".

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This activated carbon carrier combines multi-scale pores and elasticity within the carrier, forming a three-level porous structure of "macroscopic channels - mesoscopic pores - microscopic adsorption sites" through the hollow grooves of the independent cubic carrier, the splicing interface of the hexagonal splicing plate, and the micropores of the activated carbon coating. It takes into account both material transport efficiency and microbial attachment area. Combined with the dynamic buffer design of the elastic culture structure, it solves the problem of biofilm easy detachment under water flow impact of traditional rigid carriers and improves the stability of system operation.

[0015] This activated carbon carrier utilizes its porous properties to support the coexistence of microorganisms with different metabolic types through the microenvironmental differences formed by its multi-scale pore structure, thus constructing a functionally diverse microbial community. In synergy with the self-cleaning effect of the elastic structure and the mass transfer channel design, it promotes biofilm renewal and material exchange, maintains the high activity of microorganisms, and extends the effective service life of the carrier. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the microbial porous activated carbon carrier of this utility model;

[0017] Figure 2 This is a front view of the microbial porous activated carbon carrier of this utility model;

[0018] Figure 3 This is a schematic diagram of the independent carrier structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the elastic culture structure of this utility model.

[0020] In the diagram: 1. Integrated cubic carrier; 2. Independent cubic carrier; 3. Corner rectangular slots; 4. Central rectangular slots; 5. Cubic support frame; 6. Fixing beads; 7. Arc springs; 8. Transmission frame; 9. Hexagonal splicing plate; 10. Rectangular splicing interface. Detailed Implementation

[0021] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please see Figure 1-4 This utility model provides a microbial porous activated carbon carrier, which includes an integrated cubic carrier 1. The integrated cubic carrier 1 is composed of several uniformly distributed independent carrier structures. Each of the several independent carrier structures has an elastic culture structure fixedly arranged inside it. The opening direction of the elastic culture structure corresponds to the opening direction of the independent carrier structure.

[0023] Furthermore, the independent carrier structure includes an independent cubic carrier 2, with several evenly distributed corner rectangular slots 3 on the outer side of the outer surface of the independent cubic carrier 2, and a central rectangular slot 4 in the middle of the outer surface of the independent cubic carrier 2.

[0024] In use, the integrated cubic carrier 1 can flexibly adjust the filling amount according to the reactor size. The corner rectangular empty troughs 3 and the central rectangular empty trough 4 of the independent cubic carrier 2 form a through macroscopic channel. When sewage or gas flows through, pollutants, nutrients and oxygen can be quickly diffused into the interior of the carrier through the corner rectangular empty troughs 3 and the central rectangular empty trough 4. At the same time, microbial metabolites are discharged through the corner rectangular empty troughs 3 and the central rectangular empty trough 4. The concave and convex structure of the empty troughs increases the surface roughness of the independent cubic carrier 2, making it easier for microorganisms to attach and form a biofilm. Moreover, the corner rectangular empty troughs 3 and the central rectangular empty trough 4 at different positions can form an oxygen concentration gradient due to the difference in water flow velocity, which is suitable for the stratified growth requirements of aerobic and anaerobic bacteria.

[0025] Furthermore, the independent cubic carrier 2 is made of stainless steel, and the surface of the independent cubic carrier 2 is coated with powdered activated carbon.

[0026] When in use, the stainless steel independent cubic carrier 2 has high strength and corrosion resistance, and can maintain structural stability in the treatment of strong acid, strong alkali or high temperature wastewater, avoiding carrier damage that could lead to the loss of microorganisms. The powdered activated carbon coating on the surface utilizes its high specific surface area to quickly adsorb pollutants such as organic matter and heavy metals in the water, forming an "adsorption enrichment layer" that facilitates microbial contact and degradation. At the same time, the hydroxyl and carboxyl functional groups on the surface of the activated carbon have an affinity with microbial cells, strengthening the binding force between the biofilm and the carrier and reducing the shedding caused by water flow impact.

[0027] Furthermore, the elastic cultivation structure includes a cubic support frame 5, each corner of which is fixedly provided with a fixing bead 6, and each of the four corners at both ends of the cubic support frame 5 is fixedly connected with an arc spring 7, and the other end of each of the arc springs 7 is fixedly connected with a transmission frame 8.

[0028] When in use, when water or airflow impacts the independent cubic carrier 2, the arc spring 7 absorbs the external force through elastic deformation, reducing the vibration amplitude of the integrated cubic carrier 1 and preventing the biofilm from falling off due to rigid impact. The three-dimensional frame formed by the cubic support frame 5 and the transmission frame 8 provides a three-dimensional growth space for microorganisms, and the dynamic micro-vibration of the arc spring 7 can promote the shedding of aging biofilm, making room for attachment sites for new microorganisms. For example, in continuous flow sewage treatment, water flow fluctuations will drive the arc spring 7 to reciprocate, causing the transmission frame 8 to swing slightly, generating shear force on the biofilm, achieving a self-cleaning effect and maintaining the activity of the microbial community.

[0029] Furthermore, one end of each of the several transmission frames 8 is rotatably connected to one side of each of the several fixed beads 6, and the other end of each of the several transmission frames 8 is fixedly connected to a hexagonal splicing plate 9. A number of evenly distributed rectangular splicing interfaces 10 are formed between the several hexagonal splicing plates 9, and the positions of the several rectangular splicing interfaces 10 correspond to the positions of the corner rectangular slots 3.

[0030] In use, the hexagonal splicing plate 9 is aligned with the central rectangular slot 4 of the independent cubic carrier 2 through the rectangular splicing interface 10, forming a through mass transfer path of "slot-slicing interface". When sewage flows through, it can enter the rectangular splicing interface 10 from the central rectangular slot 4, and then penetrate into the interior of the independent cubic carrier 2 through the pores between the hexagonal splicing plates 9, ensuring that deep microorganisms can also contact the substrate. In addition, the modular design of the hexagonal splicing plate 9 allows the carrier to be disassembled or reassembled according to the treatment requirements. For example, in industrial wastewater treatment, multiple integrated cubic carriers 1 can be connected in series, and the graded degradation of pollutants can be achieved through the connectivity of the rectangular splicing interface 10. When some integrated cubic carriers 1 are blocked, they can be disassembled and cleaned individually without affecting the operation of the overall system.

[0031] Furthermore, the hexagonal splicing plate 9 is made of stainless steel, and the surface of the hexagonal splicing plate 9 is coated with powdered activated carbon. The powdered activated carbon has a diameter of less than 200 mesh and a specific area of ​​800-1200㎡ / g.

[0032] When in use, the finer pores of the powdered activated carbon coating (smaller than 200 mesh) result in higher adsorption efficiency for small molecule pollutants. When waste gas or wastewater passes through the surface of the hexagonal splicing plate 9, the activated carbon rapidly adsorbs pollutants. At the same time, the microporous structure with a specific surface area of ​​800-1200㎡ / g provides a large number of microscopic attachment sites for microorganisms. When treating industrial waste gas containing benzene compounds, the activated carbon first adsorbs benzene molecules, and the microorganisms attached to the coating surface decompose the benzene into carbon dioxide through metabolism, achieving a synergistic effect of "adsorption-degradation". The stainless steel hexagonal splicing plate 9 ensures that the coating is not easily peeled off during long-term operation, maintaining stable treatment performance.

[0033] In this embodiment, the integrated cubic carrier 1 is filled into a bioreactor. Microorganisms colonize the surface of the three-level porous structure of empty tanks, joints, and activated carbon micropores to form a biofilm. When sewage or waste gas passes through the integrated cubic carrier 1 and the independent cubic carrier 2, the macroscopic rectangular empty tanks 3 at the corners and 4 at the center guide the rapid distribution of fluid. The mesoscopic rectangular joints 10 promote the diffusion of substances, and the microscopic activated carbon channels adsorb and enrich pollutants. At the same time, the elastic structure buffers the impact of water flow and promotes biofilm renewal. In municipal sewage treatment, the integrated cubic carrier 1 can simultaneously degrade pollutants such as COD and ammonia nitrogen. Aerobic bacteria degrade organic matter on the surface of the rectangular empty tanks 3 at the corners and 4 at the center, while anaerobic bacteria obtain carbon sources for denitrification inside the integrated cubic carrier 1 through the rectangular joints 10. The activated carbon adsorbs recalcitrant organic matter, prolonging the reaction time, and ultimately achieving efficient purification.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A microbial porous activated carbon carrier, comprising an integrated cubic carrier (1), characterized in that: The integrated cubic carrier (1) is composed of several uniformly distributed independent carrier structures. Each of the several independent carrier structures has an elastic culture structure fixedly installed inside it. The opening direction of the elastic culture structure corresponds to the opening direction of the independent carrier structure. The elastic culture structure includes a cubic support frame (5), each corner of which is fixedly provided with a fixing bead (6), and each of the four corners at both ends of the cubic support frame (5) is fixedly connected with an arc spring (7), and the other end of each of the arc springs (7) is fixedly connected with a transmission frame (8).

2. The microbial porous activated carbon carrier according to claim 1, characterized in that: The independent carrier structure includes an independent cubic carrier (2), and a number of evenly distributed corner rectangular slots (3) are opened on the outer side of the outer surface of the independent cubic carrier (2), and a central rectangular slot (4) is opened in the middle of the outer surface of the independent cubic carrier (2).

3. The microbial porous activated carbon carrier according to claim 2, characterized in that: The independent cubic carrier (2) is made of stainless steel and the surface of the independent cubic carrier (2) is coated with powdered activated carbon.

4. The microbial porous activated carbon carrier according to claim 1, characterized in that: One end of each of the several transmission frames (8) is rotatably connected to one side of a number of fixed beads (6), and the other end of each of the several transmission frames (8) is fixedly connected to a hexagonal splicing plate (9). A number of evenly distributed rectangular splicing interfaces (10) are formed between the several hexagonal splicing plates (9), and the positions of the several rectangular splicing interfaces (10) correspond to the positions of the corner rectangular slots (3).

5. The microbial porous activated carbon carrier according to claim 4, characterized in that: The hexagonal splicing plate (9) is made of stainless steel and the surface of the hexagonal splicing plate (9) is covered with a powdered activated carbon coating. The powdered activated carbon has a diameter of less than 200 mesh and a specific area of ​​800-1200 m² / g.

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