A magic biofilm filler module
The modular biofilm filler system addresses the inflexibility and maintenance challenges of conventional fillers by enabling flexible filler configurations and recyclable materials, enhancing sewage treatment efficiency and cost-effectiveness.
Patent Information
- Application Number
- CN202111392043.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-11-23
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2041-11-23
AI Technical Summary
Conventional biofilm fillers in sewage treatment are difficult to remove and maintain, lacking flexibility in loading and configuration, and are not cost-effective for treating rural sewage with high phosphorus and low carbon-nitrogen ratios.
A modular biofilm filler system composed of a filler column with unit tubes and end caps, allowing for flexible loading and configuration of different functional fillers, including iron-carbon microelectrolysis and porous materials, with a mesh structure for enhanced hydraulic flow and aeration, and recyclable plastic materials for cost-effectiveness.
Enhances sewage treatment efficiency by providing flexible filler configurations, reduces installation costs, and improves microbial growth and oxygenation, while being environmentally friendly and cost-effective.
Smart Images
Figure CN113880242B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a magic-type biofilm filler module. Background Art
[0002] Biofilm method is a general term for a type of water treatment process, which has the characteristics of efficient and stable reaction. Biofilm reactor is a composite reactor developed by filling different fillers inside. As the core, biofilm filler provides a more favorable living environment for microorganisms. In the vertical direction, microorganisms constitute a complex ecosystem composed of multiple trophic levels such as bacteria, fungi, algae, protozoa, and metazoa. In the horizontal direction, the direction from the flow of oxygenated sewage to the carrier constitutes a suspended aerobic, attached aerobic, attached facultative anoxic and attached anaerobic microbial system with various different activities, respiratory types, and nutritional types, thereby greatly improving the treatment capacity and stability of the reactor. The key to the biofilm method is the introduction of a carrier (filler) for microbial attachment and growth. However, in terms of the extended function of the filler, the filler should also have multiple characteristics such as phosphorus removal, carbon supplementation, and low cost. While ensuring the function, it can coordinately deal with the actual situation of high phosphorus and low carbon-nitrogen ratio in rural sewage in a simpler and more economical way, so as to better achieve the standard treatment of sewage. The filler loaded in the conventional sewage treatment container is difficult to remove and maintain, which is not convenient for later operation and maintenance. Summary of the invention
[0003] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art, and to provide a magic-style biofilm filler module, which is composed of a standardized unit-type biofilm filler to form a filler column that accommodates other small particle fillers. Different functional fillers are loaded in layers in the filler column according to process requirements, biochemical reaction characteristics, hydraulic characteristics, etc., which increases the flexibility of loading, the flexibility of position switching between modules, and the convenience of production and operation and maintenance. It is also possible to replace filler modules in different functional areas and load different fillers in layers in the same module, which is conducive to achieving multiple purposes such as easy installation, switching of modules in process sequence, and stratification of microbial morphology. The entire module is composed of different fillers, and the outer frame of the module is composed of the same structural fillers that are flexibly assembled according to the required size, which improves the convenience of production, the flexibility of filler loading, and the matching degree of the module loaded into reactors of different shapes and sizes.
[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0005] A magic-style biofilm filler module, characterized in that it includes a filler column and an end cap, the end cap is arranged at the upper and lower ends of the filler column, the filler column is composed of unit tubes, adjacent unit tubes are connected to each other to form a filler cavity, and the filler cavity is provided with fillers. The modules can be filled with functional fillers of different shapes separately or in layers, and a partition can be added to the fillers in layers, and the form of the partition is similar to that of the end cap. Functional fillers can be added according to the characteristics of rural domestic sewage, such as iron-carbon microelectrolysis dephosphorization fillers, crop waste with the function of slow-release carbon source, and porous fillers (PE, polyurethane, etc.) that enhance microbial growth. The filler column is spliced by unit tubes, which is convenient to produce and manufacture, low in cost, and has a variety of shapes and flexible sizes. The upper and lower end caps are arranged to facilitate the removal and placement of the fillers, and to facilitate later maintenance and operation. Through this scheme, an application space is provided for the combined use of fixed beds and mobile beds, and the cross-section interception of the reactor from water inlet to water outlet is formed by installing the modules in parallel. Suspended fillers can be loaded between two columns of modules without the need to add additional filler interception devices, saving installation costs and improving installation convenience.
[0006] Furthermore, the unit tube has a mesh wall structure. The hydraulic fluidity inside and outside the mesh wall module is good, and the mixed flow inside and outside enhances the contact, mass transfer and reaction effect of sewage organic matter, dissolved oxygen and biofilm. The overall specific surface area of the module is large, which enhances the bioload and thus has a higher volumetric load capacity. The unit tube is a hollow structure, and fillers can also be filled inside for water purification. At the same time, the strength of the unit tube can be improved and the overall strength of the filler column can be improved. The module height is equivalent to the high water level of the reactor, and the reactor is arranged in sequence. A grid-like support structure is installed at the bottom of the reactor, and an aerator is installed in the space below the grid-like support structure corresponding to the module position. Through bottom aeration, the bubbles float up and pass through the module filler path to extend and increase the gas-liquid contact time, which is beneficial to improve the dissolved oxygen efficiency.
[0007] Furthermore, the number of fillers is at least two, and different fillers are filled in layers. The layered arrangement of fillers can improve the sewage purification effect, and the fillers can be configured according to the water purification requirements, with flexible configuration and strong adaptability. Polyurethane and other fillers with porous adsorption properties are filled as the effluent filtration module. The module is placed horizontally above the support grid before the reactor outlet and fixed, which can effectively intercept the influence of the sludge disturbance at the bottom of the filter on the effluent SS. Regular backwashing is performed to ensure the long-term use of the filter module.
[0008] Furthermore, the top and bottom layers of the packing column are both provided with zero-valent iron shavings for dephosphorization. Some of the iron shavings are placed above the inside of the module, and the hydraulic shearing of bubble rupture enhances the peeling of the iron surface attachments, thereby enhancing the service life of the dephosphorization iron shavings. The iron shavings increase the specific surface area through proper extrusion, and the porous structure of the iron shavings can effectively prevent the escape of small particles of lightweight fillers loaded in the module.
[0009] Furthermore, the end cover and the packing layered partition are connected by unit tubes. The end cover is made of unit tubes, which is easy to manufacture and reduces the manufacturing cost. The upper end cover can adopt an open cover structure to facilitate the later replenishment of consumable packing.
[0010] Furthermore, the cross section of the packing column is polygonal or circular. The use of polygonal or circular packing columns can flexibly meet the filling requirements of the reactor container.
[0011] Furthermore, the cross section of the unit tube is polygonal or circular. After the unit tube is polygonal or circular and is spliced into a packing column, the surface area of the packing can be increased, thereby improving the sewage purification effect.
[0012] Furthermore, the unit tube is made of plastic. Recyclable plastic can be used as raw material for producing plastic fillers after being recycled and granulated, which improves the resource utilization of waste and meets the requirements of energy conservation and environmental protection.
[0013] Furthermore, the unit tube is extruded once. It is directly extruded by a complete set of equipment and is a mesh tube structure. The mesh wire extrusion port shape and mesh tube cross-section shape are flexible and can be round, square, hexagonal, etc. The plastic material can be PP or PE and its modified materials.
[0014] Furthermore, the unit tubes are fixed and formed by hot melting. The unit tubes are fixed and formed by hot melting, which is convenient to fix and has a good connection effect. The upper and lower covers are surrounded by the same length of shorter unit structure fillers into corresponding shapes, and are integrally formed by hot melting and embedded in the upper and lower end faces of the cylindrical cavity. The side of the module outer frame can be further welded or fixed. After different fillers are loaded into the module cavity, the upper and lower end faces can be further welded or fixed.
[0015] The present invention has the following beneficial effects due to the adoption of the above technical solution:
[0016] 1. The module can be filled with functional fillers of different sizes, with a wide range of filler selection and flexible filling;
[0017] 2. The modules in the reactor can be flexibly configured according to the process and treatment requirements, with strong position interchangeability and easy installation;
[0018] 3. The module frame is composed of the same structural splicing units, the frame size is flexible and the production is convenient;
[0019] 4. All modules are made of biological fillers, the splicing unit of the module frame has low cost, and it is also a biofilm carrier;
[0020] 5. The materials used in the module have high resource utilization rate after recycling, which is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The present invention will be further described below in conjunction with the accompanying drawings:
[0022] Figure 1 It is a schematic diagram of the structure of the hexagonal cross-section packing column in the present invention;
[0023] Figure 2 It is a schematic structural diagram of a square cross-section packing column in the present invention;
[0024] In the figure, 1-packing column; 2-end cover; 3-unit tube. DETAILED DESCRIPTION
[0025] like Figure 1 and Figure 2 As shown, a magic-type biofilm filler module of the present invention comprises a filler column 1 and an end cap 2, the end cap 2 is arranged at the upper and lower ends of the filler column 1, the filler column 1 is composed of unit tubes 3, adjacent unit tubes 3 are connected to each other to form a filler cavity, and a filler is arranged in the filler cavity. The modules can be filled with functional fillers of different shapes separately or in layers. Functional fillers can be added according to the characteristics of rural domestic sewage, such as: iron-carbon microelectrolysis dephosphorization fillers, crop waste with the function of slow-release carbon source, and porous fillers (PE, polyurethane, etc.) that enhance microbial growth. The filler column 1 is spliced by unit tubes 3, which is easy to manufacture, low in cost, and has a variety of shapes and flexible sizes. Through this scheme, an application space is provided for the combined use of fixed beds and mobile beds. The cross-section interception of the reactor from water inlet to water outlet is formed by installing the modules in parallel. Suspended fillers can be loaded between the two types of modules without the need to add additional filler interception devices, which saves installation costs and improves installation convenience.
[0026] The unit tube 3 is a mesh wall structure. The hydraulic fluidity inside and outside the mesh wall module is good, and the mixed flow inside and outside enhances the contact, mass transfer and reaction effect of sewage organic matter, dissolved oxygen and biofilm. The overall specific surface area of the module is large, which enhances the bioload and thus has a higher volumetric load capacity. The unit tube 3 is a hollow structure, and fillers can also be filled inside for water purification. At the same time, the strength of the unit tube 3 can be improved, and the overall strength of the filler column 1 can be improved. The module height is equivalent to the high water level of the reactor, and the reactor is arranged in sequence. A grid-like support structure is installed at the bottom of the reactor, and an aerator is installed in the space below the grid-like support structure corresponding to the module position. Through bottom aeration, the bubbles float up and pass through the module filler path to extend and increase the gas-liquid contact time, which is conducive to improving the dissolved oxygen efficiency.
[0027] There are at least two types of fillers, and different fillers are layered and filled. A partition similar to an end cap can be added as needed. The layered setting of fillers can improve the sewage purification effect, and the fillers can be configured according to the water purification requirements, with flexible configuration and strong adaptability. Filling polyurethane and other fillers with porous adsorption characteristics as the effluent filtration module. The module is placed horizontally above the support grid before the reactor effluent and fixed, which can effectively intercept the influence of the sludge disturbance at the bottom of the filter on the effluent SS. Regular backwashing is performed to ensure the long-term use of the filter module.
[0028] The top and bottom layers of the packing column 1 are both provided with zero-valent iron shavings for dephosphorization. Some of the iron shavings are placed above the inside of the module, and the hydraulic shearing of bubble rupture enhances the stripping of iron surface attachments, thereby enhancing the service life of the dephosphorization iron shavings. The iron shavings are appropriately extruded to enhance the specific surface area, and the porous structure of the iron shavings can effectively prevent the escape of small-particle lightweight fillers loaded in the module.
[0029] Furthermore, the end cap 2 is formed by connecting the unit tubes 3. The end cap 2 is formed by the unit tubes 3, which is easy to manufacture and reduces the manufacturing cost. The upper end cap 2 can adopt an open cover structure to facilitate the later replenishment of consumable fillers.
[0030] The packing column 1 is polygonal or circular. The use of a polygonal or circular packing column 1 can flexibly meet the filling requirements of the reactor container.
[0031] The unit tube 3 is polygonal or circular. After being spliced into a packing column 1, the surface area of the packing can be increased to improve the sewage purification effect.
[0032] The unit tube 3 is made of plastic. Recyclable plastic is used. After being recycled and granulated, the plastic can also be used as a raw material for producing plastic fillers. The waste is recycled to improve the resource utilization degree, which meets the requirements of energy conservation and environmental protection.
[0033] The unit tube 3 is extruded once. It is directly extruded by a complete set of equipment and is a mesh tube structure. The shape of the mesh wire extrusion port and the mesh tube section are flexible and can be round, square, hexagonal, etc. The plastic material can be PP or PE and its modified materials.
[0034] The unit tubes 3 are fixed and formed by hot melting. The unit tubes 3 are fixed and formed by hot melting, which is convenient to fix and has a good connection effect. The upper and lower covers are surrounded by the same length of shorter unit structure fillers to form corresponding shapes, and are integrally formed by hot melting and embedded in the upper and lower end faces of the cylindrical cavity. The side of the module outer frame can be further welded or fixed. After different fillers are loaded into the module cavity, the upper and lower end faces can be further welded or fixed.
[0035] The way the modules are loaded in the reactor, from the perspective of the plane layout, is to place several biofilm modules in a row along the vertical plane of the inlet and outlet water flow path, and place several columns in sequence along the flow path. The device can also be filled with the modules, or placed in rows at intervals. The space separated by the intervals can be added with suspended fillers as needed. A supporting grid structure is installed at the bottom of the reactor device to isolate the lower aeration installation space.
[0036] Steel pipes are installed in transverse layers on the side walls of the reactor device. On the one hand, the steel pipes clamp the biofilm module to constrain it in a fixed position and facilitate the removal and replacement of the module. On the other hand, the steel pipes support the container wall of the reactor device, effectively resisting the lateral pressure caused by the covering soil when both sides are buried underground, thereby enhancing the structural strength of the device.
[0037] The pore size and mesh number of the packing column 1 are determined according to the size of the packing added. The edge of the mesh frame fits the inner wall of the container to avoid possible short-circuiting. Soft accessories can also be installed on the edge of the packing frame to strengthen the short-circuiting between the packing frame and the container wall.
[0038] The present invention has the following beneficial effects due to the adoption of the above technical solution:
[0039] 1. The module can be filled with functional fillers of different sizes, with a wide range of filler selection and flexible filling;
[0040] 2. The modules in the reactor can be flexibly configured according to the process and treatment requirements, with strong position interchangeability and easy installation;
[0041] 3. The module frame is composed of the same structural splicing units, the frame size is flexible and the production is convenient;
[0042] 4. All modules are made of biological fillers, the splicing unit of the module frame has low cost, and it is also a biofilm carrier;
[0043] 5. The materials used in the module have high resource utilization rate after recycling, which is energy-saving and environmentally friendly.
[0044] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.
Claims
1. A magic biofilm filler module, characterized in that: It comprises a packing column and an end cover, wherein the end cover is arranged at the upper and lower ends of the packing column, the packing column is composed of unit tubes, adjacent unit tubes are connected to each other to form a packing cavity, the packing cavity is provided with packing, and the end cover is formed by connecting the unit tubes.
2. A magic biofilm filler module according to claim 1, characterized in that: The unit tube has a mesh wall structure.
3. A magic biofilm filler module according to claim 1, characterized in that: The number of the fillers is at least two, and the different fillers are packed in layers.
4. A magic biofilm filler module according to claim 2, characterized in that: The top layer and the bottom layer of the packing column are both provided with zero-valent iron shavings dephosphorization packing.
5. A magic biofilm filler module according to claim 1, characterized in that: The packing column is a hollow structure, and the cross section of the packing column is polygonal or circular.
6. A magic biofilm filler module according to claim 1, characterized in that: The cross section of the unit tube is polygonal or circular.
7. A magic biofilm filler module according to claim 1, characterized in that: The unit tube is made of plastic.
8. The magic biofilm filler module according to claim 1, characterized in that: The unit tube is formed by one-time extrusion.
9. A magic biofilm filler module according to claim 1, characterized in that: The unit tubes are fixed and formed by hot melting.