A biological packing material and wastewater treatment equipment

Abstract

This invention relates to the field of wastewater treatment technology, providing a biological packing material and wastewater treatment equipment. The biological packing material includes a matrix; the matrix has multiple pores; the matrix can switch between a first state and a second state; when the matrix is ​​in the first state, the width of the pores is a first width; when the matrix is ​​in the second state, the width of the pores is a second width, the second width being greater than the first width, and a portion of the pores protrudes along the edge from the surface of the matrix. The biological packing material shown in this invention has a large surface area, effectively preventing clogging and easy erosion and detachment of aged biofilm, thus improving wastewater treatment efficiency, reducing the frequency of biological packing material replacement, and facilitating installation and replacement.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a biological packing material and wastewater treatment equipment. Background Technology

[0002] Biological packing media is an effective means of increasing sludge volume in wastewater treatment biochemical processes and is the main carrier for hydrolysis acidification processes and biofilm methods. Biological packing media also serve as a habitat for microorganisms, providing a stable space for their growth and reproduction, enriching microorganisms, reducing the sludge load on the treatment system, and increasing the contact probability between sludge and other materials, thereby improving the wastewater treatment effect.

[0003] Existing biological packing materials are mainly classified into combined packing materials, three-dimensional elastic packing materials, porous suspended ball packing materials, and activated biological packing materials. These materials typically increase internal structure to improve specific surface area, reducing the internal space of the packing material and designing it as a fixed multi-layered structure. However, this results in less internal impact from wastewater and a tendency to clog. Furthermore, due to the existing structure of these packing materials, aging biofilm attached to them is difficult to detach and drain. As the service life increases, the wastewater treatment efficiency of the packing material deteriorates, requiring regular replacement and hindering efforts to improve overall wastewater treatment efficiency. Summary of the Invention

[0004] This invention provides a biological packing material and a wastewater treatment device to solve or improve the problems of low biofilm formation and difficulty in detaching aged biofilms in existing biological packing materials.

[0005] This invention provides a biological filler, comprising: a matrix; the matrix having a plurality of pores; the matrix being switchable between a first state and a second state; when the matrix is ​​in the first state, the width of the pores is a first width; when the matrix is ​​in the second state, the width of the pores is a second width, the second width being greater than the first width, and a portion of the pores protruding along the edge from the surface of the matrix.

[0006] According to a biological filler provided by the present invention, the pores include expanded pores; when the matrix is ​​in a first state, the expanded pores are strip-shaped, and the width of the expanded pores is the first width; when the matrix is ​​in a second state, a portion of the expanded pores protrudes along the edge from the surface of the matrix, and the maximum width of the expanded pores is the second width.

[0007] According to a biological packing material provided by the present invention, the pores include structural reinforcement pores; the structural reinforcement pores are in communication with the expansion pores; the structural reinforcement pores are disposed at at least one end of the expansion pores along the length direction of the expansion pores.

[0008] According to a biological filler provided by the present invention, when the matrix is ​​in a first state, the expanded pores are straight, zigzag, or arc-shaped, and the first width is equal to or close to zero.

[0009] According to a biological packing material provided by the present invention, the plurality of pores are arranged sequentially along the length direction of the pores on the matrix; and / or, the plurality of pores are arranged sequentially along the width direction of the pores on the matrix.

[0010] According to the present invention, the matrix of a biological filler includes a planar matrix or a curved matrix.

[0011] According to the present invention, the substrate comprises a roll-shaped substrate, which is formed by winding a planar substrate layer by layer in a predetermined direction; or, the substrate comprises a cylindrical substrate, which is formed by connecting two sides of a planar substrate in a predetermined direction; wherein, the ratio of the axial length of the cylindrical substrate to the maximum outer diameter of the cylindrical substrate is 0.5 to 2, and the maximum outer diameter of the cylindrical substrate is less than or equal to 30 mm, or the ratio of the axial length of the cylindrical substrate to the maximum outer diameter of the cylindrical substrate is greater than 2.

[0012] According to the present invention, a biological filler material is provided, wherein the matrix includes a spherical matrix, the spherical matrix being made of a planar matrix; and a buoyancy element is provided within the spherical matrix.

[0013] According to the present invention, a biological filler is provided, wherein the matrix comprises an elastic matrix, the elastic matrix comprising a polyurethane elastic matrix or a polyethylene octene coelastic matrix; and / or, the matrix is ​​provided with dopants and / or cavities, wherein the density of the dopants is less than the density of water.

[0014] The present invention also provides a wastewater treatment device, the wastewater treatment device comprising the biological packing material as described in any of the preceding claims.

[0015] This invention provides a biological packing material and wastewater treatment equipment. The biological packing material has a simple structure, is easy to process and transport. Based on the optimized design of the substrate, it can ensure that the substrate switches from a first state to a second state under the hydraulic impact of wastewater and other external forces, thereby increasing the internal and external surface areas of the biological packing material and significantly improving the biofilm formation rate. At the same time, because the pores on the substrate expand into a three-dimensional shape when the substrate is in the second state, it provides a three-dimensional space for microorganisms, resists the impact of wastewater, and improves the biofilm strength on the substrate surface. Furthermore, based on the surface forces generated during the state switch, the aging biofilm is easily washed away, and new microorganisms reattach, improving the wastewater treatment effect. In addition, because the width of the pores on the substrate increases when the substrate is in the second state, it can effectively prevent the biological packing material from clogging, reduce the replacement frequency of the biological packing material, and save manpower and resources. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is one of the structural schematic diagrams of the first type of biological packing material provided by the present invention in its first state;

[0018] Figure 2 This invention provides Figure 1 The diagram shows the structure of the biological packing material in its second state.

[0019] Figure 3 This is the second schematic diagram of the first type of biological packing material provided by the present invention in its first state;

[0020] Figure 4 This invention provides Figure 3 The diagram shows the structure of the biological packing material in its second state.

[0021] Figure 5 This invention provides Figure 3 A magnified view of a portion of point K1;

[0022] Figure 6 This invention provides Figure 4 A magnified view of a portion of point K2;

[0023] Figure 7 This is a schematic diagram of the second type of biological packing material provided by the present invention in the first state;

[0024] Figure label:

[0025] 11: Matrix; 12: Pores; 111: Expanded pores; 121: Structural reinforcement pores. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0027] The following is combined with Figures 1-7 This invention describes a biological packing material and a wastewater treatment device.

[0028] like Figures 1 to 4 As shown, this embodiment provides a biological filler, including: a matrix 11; a plurality of pores 12 are provided on the matrix 11; the matrix 11 can switch between a first state and a second state; when the matrix 11 is in the first state, the width of the pores 12 is a first width; when the matrix 11 is in the second state, the width of the pores 12 is a second width, the second width is greater than the first width, and a portion of the pores 12 protrudes along the edge from the surface of the matrix 11.

[0029] Specifically, the biological packing material shown in this embodiment has a simple structure, is easy to process and transport. Based on the optimized design of the substrate 11, it can ensure that the substrate 11 switches from the first state to the second state under the hydraulic impact of sewage and other external forces, thereby increasing the internal and external surface areas of the biological packing material and significantly improving the biofilm formation of microorganisms. At the same time, when the substrate 11 is in the second state, the pores 12 on the substrate 11 unfold into a three-dimensional shape, which facilitates the provision of three-dimensional attachment space for microorganisms and resists the impact of sewage, thereby improving the biofilm strength on the surface of the substrate 11. Furthermore, based on the surface force generated by the substrate 11 during the state switching, the aging biofilm is easily washed away and new microorganisms reattach, improving the sewage treatment effect. In addition, since the width of the pores 12 on the substrate 11 increases when the substrate 11 is in the second state, it can effectively avoid clogging of the biological packing material, reduce the replacement frequency of the biological packing material, and save manpower and material resources.

[0030] Therefore, the biological packing material shown in this embodiment has a large surface area, which can effectively prevent clogging and the aged biofilm is easily washed away and detached, thereby improving the treatment effect of sewage, reducing the replacement frequency of biological packing material, and facilitating installation and replacement.

[0031] In practical applications, the biological packing material shown in this embodiment is immersed in sewage. The parts of the substrate 11 other than the pores 12 provide a carrier for the growth of the biofilm, and each pore 12 on the substrate 11 provides space for the attachment of the biofilm.

[0032] When wastewater flows through the biological packing material at a certain flow rate, the substrate 11 expands from a first state to a second state under hydraulic action. Microorganisms gradually attach to the surface of the substrate 11 and within the expanded pores 12, forming a biofilm. The biofilm contacts the wastewater, using organic pollutants as nutrients, thus purifying the wastewater while simultaneously multiplying itself. During the biofilm growth process, as the aged biofilm detaches, other suspended microorganisms in the wastewater gradually attach to the surface of the biological packing material, forming a new biofilm. This cycle continues, achieving highly efficient wastewater treatment.

[0033] In this embodiment, the biological packing material can be prepared into various structural forms according to actual needs. For example, the biological packing material can be prepared into sheet, column, or granule forms. However, when the biological packing material is immersed in sewage, it should be ensured that the expanded pores 12 are in contact with the water flow in a horizontal or vertical distribution state to achieve a better separation and treatment effect on the sewage flow.

[0034] For example, when the biological packing material is prepared in sheet form and immersed in an aeration tank, the air bubbles in the wastewater will be divided by the horizontally or vertically distributed pores 12 when passing through the substrate 11 of the biological packing material. This will cause the larger air bubbles to be divided into multiple smaller air bubbles, allowing for more complete exchange between water and air in the biofilm. This will help improve the oxygen transfer rate and utilization rate, and achieve efficient treatment of organic matter in the wastewater.

[0035] In some embodiments, such as Figure 1 and Figure 2 As shown, in order to facilitate the switching of the substrate 11 between the first state and the second state, the pore 12 shown in this embodiment includes an expansion hole 111; when the substrate 11 is in the first state, the expansion hole 111 is strip-shaped and the width of the expansion hole 111 is a first width; when the substrate 11 is in the second state, a portion of the expansion hole 111 protrudes along the edge from the surface of the substrate 11, and the maximum width of the expansion hole 111 is a second width.

[0036] like Figure 2As shown, since the area of ​​the portion of the substrate 11 other than the pores 12 remains unchanged, when the expanded hole 111 expands from the first width to the second width, a portion of the expanded hole 111 will deform under stress to adapt to the change in the gap width of the expanded hole 111. Obviously, the portion of the expanded hole 111 can only protrude towards the surface of the substrate 11, so that when the substrate 11 is in the second state, the expanded hole 111 has a three-dimensional shape. While increasing the surface area of ​​the biological packing, it provides a three-dimensional space for the attachment of microorganisms, making it easier for microorganisms to resist the impact of sewage, thereby improving the biofilm strength on the surface of the substrate 11.

[0037] In some embodiments, to increase the structural strength of the biological filler, the structure of the pore 12 is further optimized. Here, the pore 12 shown in this embodiment also includes a structural reinforcing hole 121; the structural reinforcing hole 121 is connected to the unfolded hole 111; the structural reinforcing hole 121 is disposed at at least one end of the unfolded hole 111 along the length direction of the unfolded hole 111.

[0038] like Figures 3 to 6 As shown, in this embodiment, a structural reinforcement hole 121 can be provided at each end of the unfolded hole 111 along its length direction. The structural reinforcement hole 121 can be a circular hole or an elliptical hole, etc.

[0039] Thus, compared to Figure 1 and Figure 2 The pores 12 in this embodiment are based on the setting of the structural reinforcement holes 121, which realizes the transformation of the acute angle connection structure with concentrated force at both ends of the expansion hole 111 into a rounded corner connection structure with uniform force, thereby strengthening the mechanical structure of the biological filler and making it more durable.

[0040] like Figure 5 As shown, in order to facilitate the control of the width of the pores 12 so as to provide surface tension for the shedding of the aged biofilm on the surface of the substrate 11 under the action of external force, this embodiment also specifically sets that when the substrate 11 is in the first state, the unfolded hole 111 is straight, and the first width is equal to zero or close to zero, for example, the first width is 0 to 5 mm.

[0041] Accordingly, such as Figure 6 As shown, based on the impact of water, when the substrate 11 switches from the first state to the second state, the expansion hole 111 expands along its width direction and is transformed into an irregular hexagonal hole due to the constraint of the structural reinforcement hole 121. The two ends of the hexagonal hole along its length direction are respectively connected to a structural reinforcement hole 121.

[0042] Of course, in this embodiment, when the substrate 11 is in the first state, the unfolded hole 111 can be set in a broken line shape or an arc shape. For example, when the unfolded hole 111 is in a broken line shape, the unfolded hole 111 can be specifically composed of two straight line segments with a preset included angle, while when the unfolded hole 111 is in an arc shape, the unfolded hole 111 can be specifically set in an arc shape or a curve shape.

[0043] In some embodiments, in order to facilitate the switching of the substrate 11 between the first state and the second state, this embodiment provides that a plurality of pores 12 are arranged sequentially on the substrate 11 along the length direction of the pores 12; and / or, a plurality of pores 12 are arranged sequentially on the substrate 11 along the width direction of the pores 12.

[0044] like Figures 1 to 4 As shown, in further optimized design, this embodiment can set the substrate 11 in a planar or curved shape to correspondingly form a planar substrate or a curved substrate. In particular, this embodiment, while setting multiple pores 12 to be arranged sequentially along the length direction of the pores 12 on the substrate 11, also sets multiple pores 12 to be arranged sequentially along the width direction of the pores 12 on the substrate 11, so that the multiple pores 12 are arranged in an array on the substrate 11, and are suitable for controlling the pores 12 to switch between an open state and a closed state under the action of hydraulic or other external forces.

[0045] In some embodiments, such as Figure 7 As shown, in this embodiment, the substrate 11 includes a cylindrical substrate, which is formed by connecting two sides of a planar substrate along a predetermined direction. Here, the port of the cylindrical substrate can be designed to be circular, triangular, rectangular, or a regular polygon, etc. Preferably, the port of the cylindrical substrate shown in this embodiment is cylindrical.

[0046] In one embodiment, the ratio of the axial length of the cylindrical substrate to the maximum outer diameter of the cylindrical substrate can be set to 0.5 to 2. For example, the ratio of the axial length of the cylindrical substrate to the maximum outer diameter of the cylindrical substrate can be 0.5, 0.6, 1.0, 1.2, 1.5, 1.8 and 2.

[0047] Meanwhile, this embodiment also sets the maximum outer diameter of the cylindrical base to be less than or equal to 30 mm. For example, the maximum outer diameter of the cylindrical base can be 10 mm, 15 mm, 20 mm, 25 mm and 30 mm.

[0048] Since the axial length of the cylindrical substrate is close to the maximum outer diameter of the cylindrical substrate, and the maximum outer diameter of the cylindrical substrate is small, the biological packing material shown in this embodiment is similar to the granular packing material known in the art.

[0049] In practical applications, in this embodiment, the width direction of the pores 12 is distributed along the axial direction of the cylindrical substrate. When the biological filler is directly thrown into the sewage treated by the sewage treatment equipment, the cylindrical substrate can be deformed along its axial direction due to the hydraulic impact of the sewage or the collision between different biological fillers, so as to switch the cylindrical substrate between the first state and the second state.

[0050] In another embodiment, when the substrate 11 is a cylindrical substrate, the ratio of the axial length of the cylindrical substrate to its maximum outer diameter can be set to be greater than 2, so that the biological packing material is columnar and ensures that the biological packing material has a large axial length. Specifically, in this embodiment, the ratio of the axial length of the cylindrical substrate to its maximum outer diameter can be set to be greater than 10.

[0051] Alternatively, in this embodiment, the substrate 11 can be configured as a roll-shaped substrate, which is formed by winding the planar substrate shown in the above embodiment layer by layer in a preset direction. Here, in this embodiment, the diameter of the roll-shaped substrate can be set according to actual needs, but the specific size of the roll-shaped substrate is not limited.

[0052] In some embodiments, the substrate may be designed to be spherical; a buoyancy element is provided in the substrate, for example, the buoyancy element may be a float known in the art.

[0053] In this embodiment, based on the setting of the buoyancy component, the buoyancy force on the biological packing in the sewage is greater than or equal to its weight, so as to ensure that the biological packing can be suspended in the sewage or to ensure that the biological packing floats on the surface of the sewage.

[0054] Based on the scheme shown in the above embodiments, in order to ensure that the biological filler can deform under the action of external force, this embodiment sets the matrix as an elastic matrix, which includes a polyurethane elastic matrix or a polyethylene octene co-elastic matrix.

[0055] Meanwhile, this embodiment may also include dopants and / or cavities within the matrix, where the density of the dopants is less than that of water. Specifically, the dopants may be wood blocks.

[0056] Thus, this embodiment can minimize the weight and density of the substrate, allowing the biological filler to be suspended in the sewage or float on the surface of the sewage.

[0057] Preferably, this embodiment also provides a wastewater treatment device, which includes the biological packing material as described in any of the preceding claims.

[0058] Specifically, since the wastewater treatment equipment includes biological packing material, and the specific structure of the biological packing material is as described in the above embodiments, the wastewater treatment equipment shown in this embodiment includes all the technical solutions of the above embodiments. Therefore, it has at least all the beneficial effects brought about by all the technical solutions of the above embodiments, which will not be elaborated here.

[0059] It should be noted that in wastewater treatment, the biological packing material shown in this embodiment can be used as a biological carrier for hydrolysis acidification, contact oxidation, anaerobic or aerobic fluidized beds, expanded beds, and biofilters. When the biological packing material is directly added to a conventional activated sludge treatment system, the treatment capacity and efficiency of the original system can be greatly improved without changing all the operating conditions of the original system, and good denitrification and phosphorus removal effects can be obtained.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A biological packing material, characterized in that, include: Matrix; The substrate has multiple pores; The substrate can switch between a first state and a second state; When the substrate is in the first state, the width of the pores is a first width; When the substrate is in the second state, the width of the pore is a second width, which is greater than the first width, and a portion of the pore protrudes from the surface of the substrate along its edge; The pores include expansion holes and structural reinforcement holes, the structural reinforcement holes communicating with the expansion holes; the structural reinforcement holes are located at at least one end of the expansion holes along their length; the structural reinforcement holes include circular holes or elliptical holes; when the substrate is in a first state, the expansion holes are strip-shaped, and the width of the expansion holes is the first width; when the substrate is in a second state, a portion of the expansion holes protrudes along the edge from the surface of the substrate, and the maximum width of the expansion holes is the second width; The biological packing material is configured to be submerged in sewage. The matrix unfolds from a first state to a second state under hydraulic action. When the matrix is ​​in the second state, the pores on the matrix unfold into a three-dimensional shape.

2. The biological packing material according to claim 1, characterized in that, When the substrate is in the first state, the unfolded hole is straight, broken, or arc-shaped, and the first width is equal to or close to zero.

3. The biological packing material according to claim 1, characterized in that, The plurality of pores are arranged sequentially along the length of the pores on the substrate; And / or, the plurality of pores are arranged sequentially on the substrate along the width direction of the pores.

4. The biological packing material according to any one of claims 1 to 3, characterized in that, The substrate includes a planar substrate or a curved substrate.

5. The biological packing material according to any one of claims 1 to 3, characterized in that, The substrate includes a roll-shaped substrate, which is formed by winding a planar substrate layer by layer in a predetermined direction; Alternatively, the substrate may include a cylindrical substrate, which is formed by connecting two sides of a planar substrate along a predetermined direction; Wherein, the ratio of the axial length of the cylindrical base to the maximum outer diameter of the cylindrical base is 0.5 to 2, the maximum outer diameter of the cylindrical base is less than or equal to 30 mm, or the ratio of the axial length of the cylindrical base to the maximum outer diameter of the cylindrical base is greater than 2.

6. The biological packing material according to any one of claims 1 to 3, characterized in that, The substrate includes a spherical substrate, which is made of a planar substrate; the spherical substrate is provided with a buoyancy element.

7. The biological packing material according to any one of claims 1 to 3, characterized in that, The matrix includes an elastic matrix, which includes a polyurethane elastic matrix or a polyethylene octene co-elastic matrix; And / or, the matrix contains dopants and / or cavities, the density of which is less than that of water.

8. A wastewater treatment device, characterized in that, The wastewater treatment equipment includes the biological packing material as described in any one of claims 1 to 7.

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