A hydrophilic biological suspension filler for MBBR water treatment and its preparation method

Abstract

The present invention provides a hydrophilic biological suspension filler for MBBR water treatment and a preparation method thereof, which relates to the technical field of water treatment. It includes an outer ring and an inner ring located inside the outer ring, and the outer ring and the inner ring are coaxially arranged; a number of support rings are arranged in an annular array between the outer ring and the inner ring. Each support ring is vertically arranged and is tangent to and fixedly connected to both the outer ring and the inner ring at the same time; a spiral coil is penetrated through each support ring, and the spiral coil penetrates through all the support rings in a spiral shape. Through unique design and structural optimization, the present invention comprehensively improves hydrophilicity, biological attachment ability, mass transfer efficiency and structural stability, and at the same time provides a preparation method for this filler.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and particularly to a hydrophilic biological suspension filler in a moving bed biofilm reactor (MBBR) and a preparation method thereof. Background Art

[0002] In the current field of water treatment, especially when using the moving bed biofilm reactor (MBBR) technology, the performance of the filler is directly related to the water treatment efficiency and effect. Traditional fillers often have problems such as poor hydrophilicity, weak biological attachment ability, low mass transfer efficiency, and poor structural stability, which seriously restrict the further development and application of the MBBR technology.

[0003] Specifically, due to the limitations of the material or structural design, traditional fillers are often difficult to maintain good dispersion and fluidity in water, resulting in uneven distribution of the biofilm, which in turn affects the growth and metabolic activities of microorganisms. In addition, the mass transfer efficiency inside the filler is also a key factor affecting the water treatment effect. Due to the single structure, traditional fillers are often difficult to achieve efficient mass exchange and transfer. At the same time, the structural stability of the filler is also a major problem. Long-term water flow impact and microbial action are likely to cause the filler to break, shortening its service life.

[0004] Therefore, there is an urgent need for a new type of hydrophilic biological suspension filler to solve the above problems and improve the efficiency and stability of the MBBR water treatment technology. Summary of the Invention

[0005] The present invention aims to provide a hydrophilic biological suspension filler for MBBR water treatment, which comprehensively improves hydrophilicity, biological attachment ability, mass transfer efficiency, and structural stability through unique design and structural optimization, and at the same time provides a preparation method for the filler.

[0006] The above technical object of the present invention is achieved through the following technical solutions: A hydrophilic biological suspension filler for MBBR water treatment includes an outer ring and an inner ring located inside the outer ring, and the outer ring and the inner ring are coaxially arranged;

[0007] A number of support rings are arranged in a circular array between the outer ring and the inner ring, each support ring is vertically arranged, and it is tangent to and fixedly connected to both the outer ring and the inner ring at the same time;

[0008] A spiral coil is penetrated through each support ring, and the spiral coil penetrates through all the support rings in a spiral shape.

[0009] In some embodiments, a plurality of inner rings are coaxially arranged and spaced apart, and the inner rings are connected to each other by a plurality of connecting rods.

[0010] In some embodiments, the connecting rods are arranged in a circular array and fixed on the inner wall of the inner ring.

[0011] In some embodiments, the spiral coil is in active contact with the inner wall of the support ring, and the spiral coil is capable of self-rotation.

[0012] In some embodiments, the material of the spiral coil is specifically a glass fiber reinforced plastic composite material.

[0013] A method for preparing a suspended filler, which is used to prepare the above-mentioned hydrophilic biological suspended filler for MBBR water treatment, comprises the following steps:

[0014] a) Raw material preparation and pretreatment;

[0015] b) Mould design and manufacturing;

[0016] c) Injection molding or extrusion molding;

[0017] d) Assemble the formed outer ring, inner ring and support ring according to the preset annular array arrangement to ensure that the components are coaxial and fit each other. Then, insert the spiral ring into the support ring from the outside to the inside or from the inside to the outside to form a spiral penetration structure and firmly fix the components.

[0018] e) Surface modification;

[0019] f) Quality inspection and packaging.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The coaxial arrangement of the outer ring and the inner ring and the annular array arrangement of the support rings of the present invention make the filler present a three-dimensional and porous structure as a whole, which greatly increases the contact area between the filler and water and improves the hydrophilicity of the filler. The design of the spiral ring further enhances the surface roughness of the filler, provides more attachment points for microorganisms, is conducive to the rapid formation and stable existence of biofilm, and thus improves the biological attachment ability.

[0022] The combined design of the support ring and the spiral ring of the present invention forms a plurality of tortuous channels inside the packing, which are conducive to the turbulence and mixing of the water flow, promote the transfer of nutrients and oxygen in the water, and improve the mass transfer efficiency. In addition, the spiral ring runs through all the support rings in a spiral shape. This design not only enhances the overall structural strength of the packing, but also enables the water flow to generate rotation and eddy current when passing through the packing, further enhancing the mass transfer effect.

[0023] The fixed connection of the outer ring, inner ring and support ring of the present invention forms a stable frame structure, which can resist the impact of water flow and the erosion of microorganisms, and extends the service life of the packing. The presence of the spiral coil not only plays a role in enhancing mass transfer, but also serves as an internal support structure of the packing, improving the overall impact resistance of the packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the suspended packing of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the suspended packing of the present invention after removing the spiral coil;

[0026] Figure 3 It is a combined schematic diagram of the inner ring and the connecting rod of the suspended packing of the present invention;

[0027] Figure 4 It is a detailed structure diagram of the spiral coil of the suspended packing of the present invention.

[0028] In the figure: 1. Outer ring; 2. Inner ring; 3. Connecting rod; 4. Support ring; 5. Spiral coil. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0032] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] As Figures 1-4 shown, this embodiment provides a hydrophilic biological suspension filler for MBBR water treatment, which includes an outer ring 1 and an inner ring 2 located inside the outer ring 1. The outer ring 1 and the inner ring 2 are coaxially arranged.

[0034] A number of support rings 4 are arranged in an annular array between the outer ring 1 and the inner ring 2. Each support ring 4 is vertically arranged and is tangent to and fixedly connected to both the outer ring 1 and the inner ring 2 at the same time.

[0035] A spiral coil 5 is penetrated through each support ring 4. The spiral coil 5 penetrates through all the support rings 4 in a spiral shape.

[0036] The coaxial arrangement of the outer ring 1 and the inner ring 2 of the present invention and the annular array arrangement of the support rings 4 make the overall filler present a three-dimensional and porous structure. This structure greatly increases the contact area between the filler and water and improves the hydrophilicity of the filler. The design of the spiral coil 5 further enhances the surface roughness of the filler, provides more attachment points for microorganisms, is conducive to the rapid formation and stable existence of the biofilm, and thus improves the biological attachment ability.

[0037] In addition, the combined design of the support ring 4 and the spiral coil 5 forms multiple tortuous channels inside the filler. These channels are conducive to the turbulence and mixing of water flow, promote the transfer of nutrients and oxygen in water, and improve the mass transfer efficiency. And the spiral coil 5 penetrates through all the support rings 4 in a spiral shape. This design not only enhances the overall structural strength of the filler, but also enables the water flow to generate rotation and vortex when passing through the filler, further enhancing the mass transfer effect.

[0038] The fixed connection of the outer ring 1, the inner ring 2 and the support ring 4 of the present invention forms a stable frame structure, which can resist the impact of water flow and the erosion of microorganisms, and extends the service life of the filler. The existence of the spiral coil 5 not only plays a role in enhancing mass transfer, but also serves as an internal support structure of the filler, improving the overall impact resistance of the filler.

[0039] The hydrophilic biological suspension filler for MBBR water treatment provided by the present invention has its working principle mainly based on its unique structure and design. When the filler is put into the MBBR reactor, due to the annular array arrangement of its outer ring 1, inner ring 2 and support ring 4, the filler shows good dispersibility and fluidity in water. At the same time, the design of the spiral coil 5 increases the surface roughness of the filler and the complexity of the internal channels, providing sufficient attachment points and growth space for microorganisms.

[0040] Under the action of water flow, the filler rotates and tumbles continuously, promoting the full contact and mixing between water and the filler. This dynamic motion state is not only beneficial to the transfer of nutrients and oxygen in water, but also promotes the growth and metabolic activities of microorganisms. Microorganisms form a stable biofilm on the surface of the filler and remove pollutants in water through adsorption, degradation and other effects.

[0041] In addition, the stable frame structure of the filler can resist long-term water flow impact and microbial erosion, ensuring the long-term stable operation of the filler. As an internal support structure, the spiral coil 5 not only enhances the overall strength of the filler, but also further improves the mass transfer efficiency and water treatment effect through its rotation and eddy current effects.

[0042] In summary, the hydrophilic biological suspension filler for MBBR water treatment provided by the present invention realizes the comprehensive improvement of hydrophilicity, biological attachment ability, mass transfer efficiency and structural stability through its unique design and structural optimization, providing strong support for the development and application of MBBR water treatment technology.

[0043] In some embodiments, such as Figures 2-3As shown, multiple inner rings 2 are provided coaxially and at intervals, and the inner rings 2 are interconnected by multiple connecting rods 3. First of all, the multiple inner rings 2 that are coaxially arranged and spaced apart are interconnected by multiple connecting rods 3 to form a more stable and complex internal support system. This design not only enhances the ability of the packing to resist water flow impact and microbial erosion, but also significantly improves the overall structural strength of the packing and extends its service life. As the bridge between the inner rings 2, the connecting rods 3 not only play a connecting role, but also disperse the impact force of the water flow on the packing, enabling the packing to maintain the integrity of its structure during long-term operation. Secondly, the setting of multiple inner rings 2 provides more attachment surfaces and growth spaces for microorganisms, which is conducive to the uniform distribution and stable existence of the biofilm. This design enables microorganisms to make more full use of the packing surface for growth and metabolic activities, thereby improving the biological treatment efficiency. The spaced arrangement between the inner rings 2 allows the water flow to pass through the packing more smoothly, promoting the full contact and mixing between the water and the packing. This dynamic water flow state is conducive to the transfer of nutrients and oxygen in the water, further improving the biological treatment efficiency. In addition, the combined design of multiple inner rings 2 and connecting rods 3 forms more and more complex channel and pore structures inside the packing. These channels and pores are not only conducive to the turbulence and mixing of the water flow, but also promote the diffusion and transfer of pollutants in the water, thereby improving the mass transfer efficiency. When the water flow passes through multiple inner rings 2 and connecting rods 3, more rotation and vortex effects will be generated. This dynamic water flow state is conducive to destroying the stable state of pollutants, making it easier to be adsorbed and degraded by microorganisms.

[0044] In some embodiments, as Figure 3 shown, the connecting rods 3 are arranged in a circular array and fixed on the inner wall of the inner ring 2. This design enables the water flow to be disturbed more evenly and orderly when passing through the packing. The circular array arrangement ensures that the water flow can receive similar resistance in all directions, thereby generating a more uniform and intense turbulence effect. This turbulence effect is not only conducive to the uniform distribution of nutrients and oxygen in the water, but also promotes the rapid diffusion and transfer of pollutants, significantly improving the mass transfer efficiency. At the same time, the turbulent water flow state is also conducive to destroying the stable state of pollutants, making it easier to be adsorbed and degraded by microorganisms. And the connecting rods 3 are arranged in a circular array and fixed on the inner wall of the inner ring 2. This design enhances the overall structural strength of the packing. The circular array arrangement enables the connecting rods 3 to support and share the force with each other, thereby improving the ability of the packing to resist water flow impact and microbial erosion. In addition, this design also makes the packing more stable and reliable during transportation, installation and replacement, reduces the operation difficulty and cost, and extends the service life of the packing.

[0045] In some embodiments, the spiral coil 5 is in movable contact with the inner wall of the support ring 4, and the spiral coil 5 can rotate on its own. This rotational movement not only increases the dynamic changes inside the packing, but also promotes further turbulence and mixing of the water flow. The rotating spiral coil 5 can continuously change the contact angle and speed between its surface and the water, thereby disrupting the laminar flow state in the water flow and enhancing the turbulence intensity of the water flow. This strong turbulent state is conducive to the rapid diffusion and transfer of nutrients, oxygen, and pollutants in the water, significantly improving the mass transfer efficiency. Moreover, the rotational movement of the spiral coil 5 provides a more dynamic and diverse growth environment for microorganisms. Microorganisms can be more evenly distributed on the surface of the rotating spiral coil 5, avoiding the phenomenon of local over-thickening or over-thinning of the biofilm caused by a static environment. At the same time, the rotational movement is also conducive to the interaction and cooperation between microorganisms, promoting the formation and stable existence of the biofilm. This dynamic growth environment is beneficial to improving the activity and metabolic rate of microorganisms, thereby improving the biological treatment efficiency. In addition, the rotational movement of the spiral coil 5 has a self-cleaning effect. Under the combined action of the water flow and microorganisms, the rotating spiral coil 5 can continuously remove dirt and impurities on its surface, avoiding the blockage and pollution of the packing. This self-cleaning ability not only extends the service life of the packing, but also ensures the long-term stable operation effect of the packing. At the same time, the rotating spiral coil 5 can also prevent the excessive aggregation and caking of microorganisms on the surface of the packing, maintaining the permeability and mass transfer efficiency of the packing.

[0046] In some embodiments, the material of the spiral coil 5 is specifically a fiberglass composite material that is corrosion-resistant, high-strength, and has moderate elasticity. This composite material is formed by compounding glass fibers and a corrosion-resistant resin through a specific process. The corrosion-resistant resin components in the fiberglass composite material, such as epoxy resin and unsaturated polyester resin, have extremely strong chemical stability and can effectively resist the long-term erosion of various corrosive substances in water (including but not limited to acids, alkalis, salts, organic solvents, and microbial metabolites), ensuring the long-term stable operation of the spiral coil 5 and even the entire packing under harsh water quality conditions and significantly extending the service life. As a reinforcing material, glass fibers endow the fiberglass composite material with extremely high tensile strength and flexural strength. This high-strength characteristic enables the spiral coil 5 to withstand mechanical stresses generated by water flow impact, microbial attachment, and collisions between packings, maintaining the structural integrity without deformation and ensuring the stable suspension and efficient operation of the packing in the MBBR reactor. The resin matrix in the fiberglass composite material has a certain toughness, enabling the spiral coil 5 to undergo moderate elastic deformation when subjected to external forces and quickly return to its original shape after the external forces are removed. This characteristic not only enhances the adaptability of the packing to water flow changes but also generates additional water flow disturbances during the deformation process, promoting the full contact and mixing between water and the packing, thereby improving the mass transfer efficiency. As the material of the spiral coil 5, the fiberglass composite material, due to its excellent comprehensive performance, enables this packing to be applicable to MBBR water treatment systems with different water quality conditions, scales, and types. Whether in the fields of industrial wastewater treatment, urban sewage treatment, or drinking water pretreatment, it can demonstrate good treatment effects and economic efficiency.

[0047] This embodiment also provides a preparation method for the suspended packing, which is used to prepare the hydrophilic biological suspended packing for MBBR water treatment as described above, and includes the following steps:

[0048] a) Raw material preparation and pretreatment: First, select materials with high hydrophilicity and good biocompatibility as the basic raw materials for preparing the outer ring 1, inner ring 2, support ring 4, and spiral coil 5, such as polyethylene (PE), polypropylene (PP), or modified polyvinyl chloride (PVC), etc. Purify these raw materials to remove impurities and ensure that they meet the relevant standards of the environmental protection and water treatment industries.

[0049] b) Mold design and manufacturing: Design a precise mold according to the preset packing structure, including the forming parts of the outer ring 1, inner ring 2, support ring 4, and spiral coil 5. The mold needs to ensure that each component can be accurately aligned and can be easily demolded from the mold. At the same time, considering the needs of subsequent assembly, the mold design should be convenient for disassembly and recombination.

[0050] c) Injection or extrusion molding: Using an injection molding machine or an extrusion machine, the pre-treated raw materials are respectively injected or extruded into a designed mold. By heating, the raw materials are melted and fill the mold, and then cooled and solidified to form the various components of the outer ring 1, inner ring 2, support ring 4 and spiral coil 5. This process requires strict control of temperature, pressure and time parameters to ensure accurate product dimensions, complete structure and stable performance.

[0051] d) Assembly and fixation: The formed outer ring 1, inner ring 2 and support ring 4 are assembled according to the preset circular array arrangement to ensure that the components are coaxial and fit each other. Subsequently, the spiral coil 5 is inserted into the support ring 4 from the outside to the inside or from the inside to the outside to form a spiral through structure, and the components are firmly fixed by means such as hot melt welding, mechanical buckles or special glue to ensure the overall stability and durability of the packing.

[0052] e) Surface modification treatment: To further improve the hydrophilicity and bioattachment ability of the packing, the assembled packing can be subjected to surface modification treatment, such as plasma treatment, chemical grafting or coating technology, etc., to introduce hydrophilic groups or bioactive substances and optimize the surface properties of the packing.

[0053] f) Quality inspection and packaging: Comprehensive quality inspection of the prepared suspended packing is carried out, including dimensional accuracy, structural integrity, hydrophilicity test, bioattachment ability evaluation and mechanical strength test, etc. After passing the inspection, the qualified packing is cleaned to remove the residues in the production process, and then packed in a certain quantity and prepared for leaving the factory.

[0054] In the above steps, through mold design and precision manufacturing, the dimensional accuracy of each component of the packing and the structural stability after assembly are ensured, so that the packing can play its role strictly according to the design requirements. The use of injection or extrusion molding technology, combined with an automated production line, greatly improves production efficiency, reduces production costs, and is conducive to the large-scale production and application promotion of the packing. The surface modification treatment further improves the hydrophilicity and bioattachment ability of the packing, provides a more ideal growth environment for microorganisms, accelerates the formation and stability of the biofilm, and thus improves the water treatment efficiency. Through strict assembly and fixation processes, as well as optional surface modification treatments, the mechanical strength and impact resistance of the packing are significantly enhanced, the service life of the packing is extended, and the replacement frequency and maintenance costs are reduced.

[0055] In summary, the preparation method of the suspended packing of the present invention not only realizes efficient and precise production, but also provides a more efficient, stable and economical suspended packing solution for the MBBR water treatment technology by optimizing the packing structure and performance.

[0056] This specific embodiment is only an interpretation of the present invention and does not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A hydrophilic biological suspension filler for MBBR water treatment, characterized by: It comprises an outer ring (1) and an inner ring (2) located inside the outer ring (1), wherein the outer ring (1) and the inner ring (2) are coaxially arranged; A plurality of support rings (4) are arranged in a ring array between the outer ring (1) and the inner ring (2), each support ring (4) is arranged vertically, and is tangential to and fixedly connected to the outer ring (1) and the inner ring (2) at the same time; A spiral ring (5) is provided in each of the support rings (4), and the spiral ring (5) spirally penetrates all of the support rings (4); The spiral ring (5) is in active contact with the inner wall of the support ring (4), and the spiral ring (5) is capable of self-rotation.

2. The hydrophilic biological suspension filler for MBBR water treatment according to claim 1, characterized in that: The inner rings (2) are provided with a plurality of coaxial and spaced-apart inner rings, and the inner rings (2) are connected to each other via a plurality of connecting rods (3).

3. The hydrophilic biological suspension filler for MBBR water treatment according to claim 2, characterized in that: The connecting rods (3) are arranged in a ring array and fixed on the inner wall of the inner ring (2).

4. The hydrophilic biological suspension filler for MBBR water treatment according to claim 1, characterized in that: The material of the spiral ring (5) is specifically a glass fiber reinforced plastic composite material.

5. A method for preparing a suspended filler, the method being used for preparing the hydrophilic biological suspended filler for MBBR water treatment according to any one of claims 1 to 4, characterized in that: The following steps are involved: a) Raw material preparation and pretreatment; b) Mould design and manufacturing; c) Injection molding or extrusion molding; d) assembling the formed outer ring (1), inner ring (2) and support ring (4) according to a preset annular array arrangement to ensure that the components are coaxial and mutually in line with each other, and then inserting the spiral ring (5) into the support ring (4) from the outside to the inside or from the inside to the outside to form a spiral penetration structure, and firmly fixing the components; e) Surface modification; f) Quality inspection and packaging.

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