Small biological purification system for packed bed

Abstract

The utility model relates to the technical field of environmental protection, and particularly provides a small-sized biological purification system for a packed bed, which comprises an aerobic unit, a plurality of sets of packed bed components are uniformly arranged at the bottom of the aerobic unit, each packed bed component comprises a base at the bottom, a stand column is connected above the base, and a lower limiting piece and an upper limiting piece are respectively arranged at the lower part and the top end of the stand column; a plurality of filler bed beds are connected in series on the upright post between the lower limiting piece and the upper limiting piece; the filler bed beds are filled with fillers; the system is further provided with an aeration assembly, the aeration assembly comprises an aeration fan and an aeration pipeline, one end of the aeration pipeline is connected with the aeration fan, the other end of the aeration pipeline is located in the aerobic unit, and the aeration pipeline is provided with a plurality of aeration outlets. According to the system, the number of the filler tire beds can be flexibly adjusted according to needs, and the failed filler tire beds can be flexibly replaced; and the standard discharge of the treated water is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection technology and relates to sewage treatment, specifically a small biological purification system with a packing bed. Background Technology

[0002] Existing rural sewage treatment often uses activated sludge (AS) or a combination of activated sludge and packing materials. However, both of these processes have shortcomings such as difficulty in maintaining sludge, poor sedimentation and separation, difficulty in biofilm formation on packing materials, and poor interception by packing materials. In particular, when the treatment system is dealing with peak conditions of sudden changes in water volume and quality, it cannot avoid sludge leakage at the end of the self-generated sedimentation and separation unit, which can easily lead to risks such as rebound and exceeding of particulate pollutants such as SS and TP. Summary of the Invention

[0003] This invention provides a small-scale biological purification system with a packing bed, which can flexibly adjust the number of packing beds as needed and flexibly replace failed packing beds, ensuring that the treated water meets the discharge standards.

[0004] The technical solution of this utility model is to provide a small biological purification system with a packing bed, including an aerobic unit. Multiple packing bed assemblies are evenly arranged at the bottom of the unit. Each packing bed assembly includes a base at the bottom, a column connected above the base, a lower limit member and an upper limit member at the bottom and top of the column, respectively. Several packing beds are connected in series on the column between the lower limit member and the upper limit member. The packing beds are filled with packing material. The system also includes an aeration assembly, which includes an aeration fan and an aeration pipe. One end of the aeration pipe is connected to the aeration fan, and the other end is located in the aerobic unit and has multiple aeration outlets.

[0005] Furthermore, the packing bed assemblies are arranged in an array within the aerobic unit, and the horizontal and vertical spacing between adjacent packing bed assemblies is uniform.

[0006] Furthermore, the packing bed includes a shell, with mesh pockets at the bottom and top of the shell. The mesh pockets are fixed to the lower and upper edges of the shell, respectively, forming a receiving chamber between the shell and the mesh pockets, and the receiving chamber is filled with packing material.

[0007] Furthermore, the shell is made of waste tires, and to prevent the shell from floating on the water surface, a counterweight is installed inside the shell as needed.

[0008] Furthermore, the mesh size of the net bag is 1~2cm; the filler has a minimum size larger than the mesh size.

[0009] Furthermore, the net is secured by buckles.

[0010] Furthermore, both the lower and upper limit components are cross-shaped structures, which are fixed perpendicularly to the column; the length of the cross is greater than the maximum outer diameter of the filler bed.

[0011] Furthermore, the filler bed and the lower limit component are respectively fixed to the four ends of the cross structure by snap fasteners.

[0012] Furthermore, the connection between the base, column, lower limit component, and upper limit component is a threaded connection.

[0013] Furthermore, the aeration pipe is located at the lower part of the aerobic unit, and its aeration outlet is set upwards.

[0014] This utility model has the following beneficial effects:

[0015] The system provided by this utility model, by setting multiple sets of packing bed assemblies in the aerobic unit, allows for adjustment of the number of packing bed assemblies as needed. The packing bed assemblies are fixed to the aerobic unit via a base, and the number of packing beds on their columns can also be flexibly adjusted as required. The number of packing beds in the entire aerobic unit is adjustable; when the influent flow is large or the water quality is poor, the number of packing beds is increased, and when the influent flow is reduced or the water quality is good, the number of packing beds is decreased. This system can cope with changes in water flow and quality, ensuring stable water treatment, and that indicators such as ammonia nitrogen, TP, COD, SS, and TP all meet relevant standards.

[0016] The shell of the packing bed of this utility model is preferably a waste tire, which can be used for waste utilization. The inner wall is filled with polyurethane packing, MBBR packing, loofah packing, or crushed rubber tire sheet packing, etc. After modification and treatment, the packing has a positive charge, which can achieve electrical neutralization with the negatively charged sludge flocs. It also has a good specific surface area, porosity of plant filament tissue, and physical and chemical adhesion properties, making it easier to capture sludge bacteria flocs on its structure and achieve biological purification of pollutants. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the planar layout of this utility model.

[0018] Figure 2 This is a side view of the layout of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the filler bed support of this utility model.

[0020] Figure 4 This is a schematic diagram of the filler bed of this utility model.

[0021] Figure 5 This is a schematic diagram showing the lower limit component of this utility model being fixed to the filler bed. Detailed Implementation

[0022] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that the following embodiments are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention.

[0023] like Figures 1-5 As shown, this utility model provides a small-scale biological purification system with packing beds, including an aerobic unit 1. Multiple packing bed assemblies 2 are evenly arranged at the bottom of the aerobic unit 1. Each packing bed assembly includes a packing bed support, specifically a base 21 at the bottom. A column 22 is connected above the base. The column has a lower limit member 23 and an upper limit member 24 at its lower and upper ends, respectively. Several packing beds 25 are connected in series on the column between the lower and upper limit members, and the packing beds are filled with packing material. The system also includes an aeration assembly 3, which includes an aeration fan 31 and an aeration pipe 32. One end of the aeration pipe is connected to the aeration fan, and the other end is located inside the aerobic unit 1, with multiple aeration outlets. The packing bed assemblies of this system are relatively independent, and the number of packing beds is adjustable, allowing for flexible adjustments as needed.

[0024] In some embodiments, the packing bed assemblies are arranged in an array within the aerobic unit 1, with uniform horizontal and vertical spacing between adjacent packing bed assemblies. This system achieves dynamic adjustment of treatment capacity through the array layout of the packing bed assemblies: when the influent load increases, the number of packing bed assemblies or packing beds can be expanded horizontally or vertically; the number can be reduced accordingly after water quality improves, giving the system flexible capacity expansion capabilities to adapt to the large fluctuations in the volume and quality of rural sewage.

[0025] In some embodiments, the packing bed 25 includes a shell 251, with mesh pockets 252 at both the bottom and top of the shell. The mesh pockets 252 are fixed to the lower and upper edges of the shell, respectively, forming a receiving chamber between the shell and the mesh pockets. The receiving chamber is filled with packing material 253. This system employs a double-layer mesh pocket structure with packing material filling the middle. The mesh pockets effectively intercept large impurities or floating objects, preventing them from adversely affecting the packing material. This ensures rapid film formation on the packing material surface, enabling the adsorption of colloidal contaminants.

[0026] In a more preferred embodiment, the shell is a waste tire. To prevent the shell from floating on the water surface, a counterweight (such as one with a portion of the wheel hub) is installed inside the shell as needed. Using waste tires as the biological carrier substrate, combined with the counterweight, enables precise underwater positioning, reducing costs. Ensuring that the waste motor vehicle tires are of uniform size, their weight is generally above 5 kg, preventing them from floating when submerged in water or under aeration because their weight exceeds buoyancy. Using waste tires as the shell provides a large specific surface area, strong wear resistance, good resistance to sewage corrosion, low waste utilization costs, and readily available sources. Furthermore, the modified rubber structure facilitates microbial implantation on the tire material surface, thus achieving the resource utilization of waste tires.

[0027] In a more preferred embodiment, the mesh size of the net is 1-2 cm; the filler has a minimum size larger than the mesh size. The filler can specifically be hydrophilic, lightweight, suspended, easily biofilm-attached polyurethane filler, MBBR filler, loofah filler, or sheet-like filler made from crushed rubber tires. After bonding and stabilizing modification, the filler acquires a positive charge, allowing it to neutralize the negatively charged sludge flocs. It also possesses a good specific surface area, porosity of the plant fiber structure, and physicochemical adhesion properties, making it easier to capture sludge bacteria flocs on their outer cortex. The filler can be a single type or a combination of multiple fillers, such as the aforementioned fillers mixed in a 1:1:1:1 mass ratio. The short side dimension of the filler is 2-4 cm, ensuring a gradient design between the mesh size and the filler particle size. This guarantees space for microbial attachment while preventing filler loss, solving the problem of sludge runoff in traditional processes.

[0028] In a more preferred embodiment, the net bag 252 is secured by a snap fastener. This forms a sealed, cylindrical, single-filler bed structure.

[0029] In some embodiments, both the lower limiting member 23 and the upper limiting member 24 are cross-shaped structures, which are fixed perpendicularly to the column; the length of the cross is greater than the maximum outer diameter of the filler bed. It is 20-50cm wider than the outer diameter of the tire to ensure that the tire does not fall off when it is fitted onto the column.

[0030] In a more preferred embodiment, the filler bed 25 and the lower limiting member 23 are respectively fixed to the four ends of the cross structure by snap fasteners. Figure 5 The diagram shows the fixing structure of four symmetrical clips and the filler bed 25.

[0031] In some embodiments, the connection between the base, column, lower limit member, and upper limit member is a threaded connection, facilitating flexible disassembly and removal.

[0032] In some embodiments, the aeration pipe is located at the bottom of the aerobic unit, and its aeration outlet faces upward. Combined with the layered arrangement of the packing bed, a synergistic effect of "aeration disturbance - packing interception" is formed: the upward flow generated by aeration promotes the collision and contact between sludge flocs and the packing, enhancing mass transfer efficiency; the packing layer's cutting effect on air bubbles improves oxygen utilization. The main function of the aeration component is aeration and oxygenation, promoting more efficient degradation of wastewater after the packing forms a biofilm; simultaneously, the aeration component can also increase the aeration rate to scour the packing bed, especially when the packing is clogged and ineffective, scouring can clear and improve the flow channels of the packing layer, or promptly restore the porosity of the packing.

[0033] When the specific system is arranged, when the packing bed is fully filled, the volume of a single packing bed is v0. Based on the process experience requirements or the required filling rate f of the packing in aerobic unit 1 (its effective volume is V) through small-scale testing, the number N of the most suitable packing bed to be placed in aerobic unit 1 can be quantitatively determined according to the formula: N=V×f / v0.

[0034] The system provided by this utility model flexibly realizes in-situ feeding and replacement of materials in a mesh cage based on changes in process parameter requirements, and adopts a fixed-position method for on-site installation in combination with the application scenario. It is suitable for daily processing capacities of 20~100 m³. 3 A small-scale agricultural wastewater treatment system with a capacity of / d. It can ensure that ammonia nitrogen is consistently below 8 mg / L, SS is consistently below 30 mg / L, and COD is below 60 mg / L, meeting or exceeding the Class B water quality standards of GB18918-2002 or local rural wastewater treatment and discharge standards.

[0035] The above embodiments describe preferred embodiments of the present invention, but the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combining the various technical features in any other way. These simple modifications and combinations should also be considered as the content disclosed by the present invention and all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be determined by the appended claims.

Claims

1. A packed bed mini bio-purification system characterized by: The system includes an aerobic unit (1), with multiple sets of packing bed assemblies (2) evenly arranged at its bottom. The packing bed assembly includes a base (21) at the bottom, and a column (22) connected above the base. The column is provided with a lower limit (23) and an upper limit (24) at its lower and upper ends, respectively. Several packing beds (25) are connected in series on the column between the lower limit and the upper limit. The packing beds are filled with packing material. The system also includes an aeration assembly, which includes an aeration blower and an aeration pipe. One end of the aeration pipe is connected to the aeration blower, and the other end is located inside the aerobic unit (1) and is provided with multiple aeration outlets.

2. The system of claim 1, wherein: The packing bed assemblies are arranged in an array within the aerobic unit (1), and the horizontal and vertical spacing between adjacent packing bed assemblies is uniform.

3. The system of claim 1, wherein: The packing bed (25) includes a shell (251), and a net bag (252) is provided at the bottom and top of the shell. The net bag (252) is fixed to the lower and upper edges of the shell respectively, and a receiving chamber is formed between the shell and the net bag. The receiving chamber is filled with packing material.

4. The system according to claim 3, characterized in that: The shell is made of waste tires. To prevent the shell from floating on the water, a counterweight is installed inside the shell as needed.

5. The system according to claim 3, characterized in that: The mesh size of the net bag is 1-2 cm; the filler has a minimum size larger than the mesh size.

6. The system according to claim 3, characterized in that: The net bag (252) is secured by a buckle.

7. The system according to any one of claims 1 to 6, characterized in that: The lower limit member (23) and the upper limit member (24) are both cross structures, which are fixed perpendicularly to the column; the length of the cross is greater than the maximum outer diameter of the filling bed.

8. The system of claim 7, wherein: The filling bed (25) and the lower limit member (23) are respectively fixed to the four ends of the cross structure by buckles.

9. The system according to any one of claims 1 to 6, characterized in that: The connection between the base, column, lower limit component and upper limit component is a threaded connection.

10. The system according to claim 1, characterized in that: The aeration pipe is located at the bottom of the aerobic unit, and its aeration outlet is set upwards.

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