Hydrophilic biological suspended filler for MBBR (moving bed biofilm reactor) water treatment and preparation method of hydrophilic biological suspended filler

Abstract

The invention provides a hydrophilic biological suspended filler for MBBR water treatment and a preparation method thereof, and relates to the technical field of water treatment.The hydrophilic biological suspended filler comprises an outer ring and an inner ring located in the outer ring, and the outer ring and the inner ring are coaxially arranged; a plurality of supporting rings are arranged between the outer ring and the inner ring in an annular array mode, and the supporting rings are vertically arranged, tangent to the outer ring and the inner ring at the same time and fixedly connected with the outer ring and the inner ring. A spiral ring is arranged in each supporting ring in a penetrating mode, and the spiral rings spirally penetrate through all the supporting rings. According to the invention, through unique design and structural optimization, the hydrophilicity, the biological adhesion ability, the mass transfer efficiency and the structural stability are comprehensively improved, and meanwhile, the invention provides a preparation method of the filler.

Description

Technical Field

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

[0002] In the current water treatment field, especially when using 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 MBBR technology.

[0003] Specifically, due to the limitations of material or structural design, traditional fillers often have difficulty maintaining good dispersion and fluidity in water, which makes it difficult for biofilms to be evenly distributed, thus affecting the growth and metabolic activities of microorganisms. In addition, the mass transfer efficiency within the filler is also a key factor affecting the water treatment effect. Due to the single structure of traditional fillers, it is often difficult to achieve efficient material 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 can easily cause the filler to break, shortening its service life.

[0004] Therefore, a new type of hydrophilic biological suspended filler is urgently needed to solve the above problems and improve the efficiency and stability of MBBR water treatment technology. Summary of the invention

[0005] The present invention aims to provide a hydrophilic biological suspended filler for MBBR water treatment, which can achieve comprehensive improvement in hydrophilicity, biological attachment ability, mass transfer efficiency and structural stability through unique design and structural optimization, and also provides a preparation method of the filler.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: A hydrophilic biological suspension filler for MBBR water treatment, comprising an outer ring and an inner ring located inside the outer ring, wherein the outer ring and the inner ring are coaxially arranged; A plurality of support rings are arranged in a circular array between the outer ring and the inner ring, each of the support rings is arranged vertically, and is tangent to and fixedly connected to the outer ring and the inner ring at the same time; A spiral ring is provided in each of the support rings, and the spiral ring runs through all the support rings in a spiral shape.

[0007] In some embodiments, the inner rings are provided with a plurality of coaxial and spaced apart arrangements, and the inner rings are interconnected by a plurality of connecting rods.

[0008] In some embodiments, the connecting rods are arranged in a circular array and fixed on the inner wall of the inner ring.

[0009] 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.

[0010] In some embodiments, the material of the spiral coil is specifically a glass fiber reinforced plastic composite material.

[0011] 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: a) Raw material preparation and pretreatment; b) Mould design and manufacturing; c) Injection molding or extrusion molding; 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. e) Surface modification; f) Quality inspection and packaging.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 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.

[0013] 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.

[0014] The fixed connection of the outer ring, the inner ring and the 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 prolong the service life of the packing. The existence of the spiral ring not only enhances the mass transfer, but also serves as the internal support structure of the packing, thereby improving the overall impact resistance of the packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the suspension filler of the present invention; Figure 2 This is a schematic diagram of the structure of the suspended filler of the present invention after the spiral coil is removed; Figure 3 It is a schematic diagram of the combination of the inner ring and the connecting rod of the suspension filler of the present invention; Figure 4 It is a detailed structural diagram of the spiral coil of the suspension filler of the present invention.

[0016] In the figure: 1. outer ring; 2. inner ring; 3. connecting rod; 4. supporting ring; 5. spiral ring. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position 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 therefore cannot be understood as a limitation on the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-4As shown, this embodiment provides a hydrophilic biological suspension filler for MBBR water treatment, comprising 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 circular 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 support ring 4 , and the spiral ring 5 spirally penetrates all the support rings 4 .

[0022] The coaxial arrangement of the outer ring 1 and the inner ring 2 and the annular array arrangement of the support ring 4 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 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 biofilm, and thus improves the biological attachment ability.

[0023] In addition, the combined design of the support ring 4 and the spiral ring 5 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. Moreover, the spiral ring 5 runs through all the support rings 4 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.

[0024] 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 prolong the service life of the packing. The existence of the spiral ring 5 not only plays a role in enhancing mass transfer, but also serves as an internal support structure of the packing, thereby improving the overall impact resistance of the packing.

[0025] The hydrophilic biological suspension filler for MBBR water treatment provided by the present invention has a 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 the outer ring 1, the inner ring 2 and the support ring 4, the filler exhibits good dispersibility and fluidity in the water. At the same time, the design of the spiral ring 5 increases the surface roughness of the filler and the complexity of the internal channel, providing sufficient attachment points and growth space for microorganisms.

[0026] Under the action of water flow, the filler rotates and tumbles continuously, promoting full contact and mixing between water and filler. This dynamic state of motion is not only conducive to the transfer of nutrients and oxygen in the water, but also promotes the growth and metabolic activities of microorganisms. Microorganisms form a stable biofilm on the surface of the filler, removing pollutants in the water through adsorption, degradation and other effects.

[0027] In addition, the stable frame structure of the packing can resist long-term water flow impact and microbial erosion, ensuring the long-term stable operation of the packing. The spiral ring 5, as an internal support structure, not only enhances the overall strength of the packing, but also further improves the mass transfer efficiency and water treatment effect through its rotation and vortex action.

[0028] In summary, the hydrophilic biological suspended filler for MBBR water treatment provided by the present invention achieves comprehensive improvement in 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.

[0029] In some embodiments, Figure 2-3 As shown, the inner ring 2 is provided with a plurality of coaxial and spaced inner rings, and each inner ring 2 is connected to each other by a plurality of connecting rods 3. First, a plurality of coaxial and spaced inner rings 2 are connected to each other by a plurality of connecting rods 3, forming a more stable and complex internal support system. This design not only enhances the ability of the filler to resist water flow impact and microbial erosion, but also significantly improves the overall structural strength of the filler and prolongs its service life. As a bridge between the inner rings 2, the connecting rod 3 not only plays a connecting role, but also disperses the impact force of the water flow on the filler, so that the filler can still maintain the integrity of the structure under 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 biofilms. This design enables microorganisms to more fully utilize the surface of the filler for growth and metabolic activities, thereby improving the biological treatment efficiency. The interval setting between the inner rings 2 enables the water flow to pass through the filler more smoothly, promoting full contact and mixing between water and the filler. This dynamic water flow state is conducive to the transfer of nutrients and oxygen in 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 channels and pore structures inside the packing. These channels and pores are not only conducive to the turbulence and mixing of water flow, but also promote the diffusion and transfer of pollutants in the water, thereby improving the mass transfer efficiency. When the water flows through multiple inner rings 2 and connecting rods 3, more rotation and eddy effects will be generated. This dynamic water flow state is conducive to destroying the stable state of pollutants, making them more easily adsorbed and degraded by microorganisms.

[0030] In some embodiments, Figure 3As shown, each connecting rod 3 is arranged in a circular array and fixed on the inner wall of the inner ring 2. This design allows the water flow to be disturbed more evenly and orderly when passing through the filler. The arrangement of the circular array ensures that the water flow is subject to similar resistance in all directions, thereby producing a more uniform and strong 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 them more easily 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, and this design enhances the overall structural strength of the filler. The arrangement of the circular array enables the connecting rods 3 to support each other and share the force, thereby improving the ability of the filler to resist water flow impact and microbial erosion. In addition, this design also makes the filler more stable and reliable during transportation, installation and replacement, reduces the difficulty and cost of operation, and extends the service life of the filler.

[0031] In some embodiments, the spiral coil 5 is in active contact with the inner wall of the support ring 4, and the spiral coil 5 can rotate. This rotation not only increases the dynamic changes inside the filler, but also promotes further turbulence and mixing of the water flow. The self-rotating spiral coil 5 can continuously change the contact angle and speed between its surface and the water, thereby destroying the laminar flow state in the water flow and enhancing the turbulent 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, and significantly improves the mass transfer efficiency. And the self-rotation 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 self-rotating spiral coil 5, avoiding the phenomenon of local excessive thickness or excessive thinness of the biofilm caused by the static environment. At the same time, the self-rotation is also conducive to the interaction and cooperation between microorganisms, and promotes the formation and stable existence of biofilms. This dynamic growth environment is conducive to improving the activity and metabolic rate of microorganisms, thereby improving the biological treatment efficiency. In addition, the self-rotation of the spiral coil 5 has a self-cleaning effect. Under the combined action of water flow and microorganisms, the self-rotating spiral ring 5 can continuously remove dirt and impurities on its surface, avoiding clogging and contamination of the filler. This self-cleaning ability not only prolongs the service life of the filler, but also ensures the long-term stable operation effect of the filler. At the same time, the self-rotating spiral ring 5 can also prevent excessive aggregation and agglomeration of microorganisms on the surface of the filler, maintaining the permeability and mass transfer efficiency of the filler.

[0032] In some embodiments, the material of the spiral coil 5 is specifically a corrosion-resistant, high-strength and moderately elastic glass fiber reinforced plastic composite material, which is composited by glass fiber and corrosion-resistant resin through a specific process. The corrosion-resistant resin components in the glass fiber reinforced plastic composite material, such as epoxy resin, unsaturated polyester resin, etc., 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 that the spiral coil 5 and even the entire filler can operate stably for a long time under harsh water conditions, significantly extending the service life. As a reinforcing material, glass fiber gives the glass fiber reinforced plastic composite material extremely high tensile strength and bending strength. This high-strength characteristic enables the spiral coil 5 to withstand the mechanical stress generated by water flow impact, microbial attachment and collision between fillers, maintain the integrity of the structure and not deform, and ensure the stable suspension and efficient operation of the filler in the MBBR reactor. The resin matrix in the glass fiber reinforced plastic composite material has a certain toughness, so that the spiral coil 5 can undergo moderate elastic deformation when subjected to external force, and quickly return to its original state after the external force is removed. This characteristic not only enhances the adaptability of the filler to water flow changes, but also generates additional water flow disturbances during the deformation process, promoting full contact and mixing between water and filler, thereby improving mass transfer efficiency. As the material of the spiral ring 5, the fiberglass composite material can be applied to MBBR water treatment systems of different water quality conditions, different scales and types due to its excellent comprehensive performance. Whether in the fields of industrial wastewater treatment, urban sewage treatment or drinking water pretreatment, it can show good treatment effects and economy.

[0033] This embodiment also provides a method for preparing a suspended filler, which is used to prepare the above-mentioned hydrophilic biological suspended filler for MBBR water treatment, comprising the following steps: a) Raw material preparation and pretreatment: First, materials with high hydrophilicity and good biocompatibility are selected as the basic raw materials for preparing the outer ring 1, the inner ring 2, the support ring 4 and the spiral ring 5, such as polyethylene (PE), polypropylene (PP) or modified polyvinyl chloride (PVC). These raw materials are purified to remove impurities and ensure that they meet the relevant standards of the environmental protection and water treatment industries.

[0034] b) Mold design and manufacturing: According to the preset packing structure, design a precise mold, including the molding parts of the outer ring 1, inner ring 2, support ring 4 and spiral ring 5. The mold must 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 easy to disassemble and reassemble.

[0035] c) Injection molding or extrusion molding: Use an injection molding machine or extruder to inject or extrude the pre-treated raw materials into the designed mold, heat the raw materials to melt and fill the mold, and then cool and solidify to form the outer ring 1, inner ring 2, support ring 4 and spiral ring 5. This process requires strict control of temperature, pressure and time parameters to ensure that the finished product is accurate in size, complete in structure and stable in performance.

[0036] d) Assembly and fixation: Assemble the formed outer ring 1, inner ring 2 and support ring 4 according to the preset annular array arrangement to ensure that the components are coaxial and fit each other. Then, insert 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 fix the components firmly by hot melt welding, mechanical buckle or special glue to ensure the overall stability and durability of the packing.

[0037] e) Surface modification: To further improve the hydrophilicity and biological adhesion ability of the filler, the assembled filler can be subjected to surface modification, such as plasma treatment, chemical grafting or coating technology, to introduce hydrophilic groups or bioactive substances and optimize the surface properties of the filler.

[0038] f) Quality testing and packaging: The prepared suspension fillers are subjected to comprehensive quality testing, including dimensional accuracy, structural integrity, hydrophilicity testing, biological adhesion capacity assessment, and mechanical strength testing. After passing the test, the qualified fillers are cleaned to remove residues from the production process, and then packaged in a certain quantity and ready for shipment.

[0039] In the above steps, the dimensional accuracy of each component of the filler and the structural stability after assembly are ensured through mold design and precision manufacturing, so that the filler can function strictly in accordance with the design requirements. The use of injection molding or extrusion molding technology, combined with an automated production line, greatly improves production efficiency and reduces production costs, which is conducive to the large-scale production and application promotion of fillers. Surface modification further enhances the hydrophilicity and biological adhesion ability of the filler, provides a more ideal growth environment for microorganisms, accelerates the formation and stabilization of biofilms, and thus improves water treatment efficiency. Through strict assembly and fixing processes, as well as optional surface modification treatments, the mechanical strength and impact resistance of the filler are significantly enhanced, the service life of the filler is extended, and the replacement frequency and maintenance costs are reduced.

[0040] In summary, the method for preparing suspended filler of the present invention not only realizes efficient and precise production, but also provides a more efficient, stable and economical suspended filler solution for MBBR water treatment technology by optimizing the filler structure and performance.

[0041] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are 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) being arranged vertically and being tangential to and fixedly connected to both the outer ring (1) and the inner ring (2); A spiral ring (5) is provided through each of the support rings (4), and the spiral ring (5) spirally penetrates all of the support rings (4).

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 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.

5. 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.

6. 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 5, 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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