Sewage treatment device of bio-membrane reactor

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a biofilm reactor sewage treatment device which comprises a net cage and filler arranged in the net cage, plants are planted in the filler, the bottom end of the net cage is connected with a biofilm, a floating bottle is arranged outside the net cage, and the floating bottle is connected with the biofilm. The biological membrane is used for providing attachment points for microorganisms, and when sewage flows to the biological treatment area, the microorganisms passing through the biological membrane can be transferred to the surface of the biological membrane from a sewage main body through the molecular diffusion effect. Microorganisms in the biological membrane take the organic pollutants as nutrient sources and decompose and reduce the eutrophication degree of a water body through own metabolic activity, and meanwhile, the device can float on the water surface in a semi-fixed state through buoyancy provided by the floating bottle, so that the position can be adjusted at any time according to sewage distribution, and the treatment efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically, it relates to a biofilm reactor wastewater treatment device. Background Technology

[0002] Among numerous wastewater treatment technologies, biofilm technology, as one of the core biological treatment methods, is on par with activated sludge. It relies on microorganisms attaching and growing on the surface of a fixed carrier to form a biofilm, utilizing the metabolic activities of these microorganisms to degrade pollutants. Its history is long, but due to its high efficiency, stability, and strong resistance to shock loads, it continues to be developed and innovated. Floating island technology is an important ecological application of biofilm technology. It involves constructing artificial floating island platforms on the water surface and planting specific emergent or aquatic plants. These plants not only directly absorb nutrients such as nitrogen and phosphorus from the water through their roots, but their extensive root network also provides an ideal attachment and growth carrier for a large number of microorganisms, forming a highly efficient "rhizosphere micro-ecosystem." Combined with the adsorption and interception effects of plant stems and leaves, this synergistically achieves multi-pathway and multi-level absorption, adsorption, and biodegradation purification of pollutants (including organic matter, nutrients, and even some heavy metals) in wastewater.

[0003] However, the widely used traditional bio-floating islands have revealed a series of significant shortcomings in actual operation. The biggest problem lies in their rigid structure and mostly fixed installation—floating island units are typically firmly fixed to pre-set positions via anchors or rigid connectors. This model makes it difficult to flexibly adjust the location and coverage area of ​​the floating islands once set, failing to optimize deployment based on dynamic conditions such as actual changes in pollutant distribution in the water, seasonal changes in prevailing wind and water flow direction, or water quality deterioration in specific areas, greatly limiting the maximization of their purification efficiency. Furthermore, this fixed structure significantly increases the difficulty and cost of maintenance: whether it's cleaning accumulated floating debris, harvesting overly dense or withered plants, repairing damaged floating units, or dealing with potential displacement or damage due to extreme weather, a large amount of manpower, vessels, and resources are required for on-site operations. This is not only inefficient and poses safety risks, but also results in high long-term operating and maintenance costs. This lack of flexibility and high maintenance burden makes it difficult for traditional bio-floating islands to guarantee long-term, stable, efficient, and economical operation in the face of complex and changing aquatic environments, becoming a key bottleneck restricting the wider application of this technology.

[0004] Based on this, the present invention provides a biofilm reactor wastewater treatment device to solve the problems existing in the prior art. Utility Model Content

[0005] In view of this, the main purpose of this utility model is to provide a biofilm reactor wastewater treatment device to solve the problems that traditional biological floating islands are difficult to adjust flexibly according to actual conditions such as wastewater quality and water flow direction, and require a lot of manpower and material resources for maintenance, which is not conducive to long-term stable operation.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A biofilm reactor wastewater treatment device, comprising:

[0008] The main frame consists of a topless net cage forming the reactor body, with biofilm attachment components arranged circumferentially along the bottom outer edge of the net cage to form a ring-shaped biological treatment zone.

[0009] The ecological treatment unit includes a modular planting board set at the opening at the top of the cage, which longitudinally divides the cage into an aquatic plant planting area and a filler layer.

[0010] The buoyancy positioning unit is a floating positioning mechanism integrated on the outer wall of the cage.

[0011] In a preferred embodiment of this utility model, the aquatic plant planting area is located above the planting board; the filler layer is located between the planting board and the bottom of the net box, and is filled with planting filler.

[0012] In a preferred embodiment of this utility model, the planting board is divided into planting areas.

[0013] In a preferred embodiment of this utility model, a limiting platform is provided on the inner side of the upper opening of the net cage, and the limiting platform is matched with the planting board.

[0014] In a preferred embodiment of this utility model, the side walls and bottom walls of the cage are provided with several connecting holes.

[0015] In a preferred embodiment of the present invention, the biofilm attachment assembly includes a plurality of biofilms, which are fixed to the lower surface of the cage by rigid connecting rods.

[0016] In a preferred embodiment of the present invention, the floating positioning mechanism includes a connecting belt and a floating bottle. The connecting belt is fixedly disposed on the outer wall of the net cage, and an elastic band is provided on the outer side wall of the connecting belt. The floating bottle is fixed to the outer wall of the net cage by the elastic band.

[0017] In a preferred embodiment of this utility model, the number of floating bottles is several, and the floating bottles are evenly distributed on both sides of the net cage in a symmetrical structure.

[0018] In a preferred embodiment of the present invention, the floating positioning mechanism further includes a locking seat, which is disposed on the outside of the connecting belt at the location of the elastic belt, and an arc groove is provided on one side of the outer wall of the locking seat to engage with the floating bottle.

[0019] In a preferred embodiment of the present invention, the floating positioning mechanism further includes a locking plate, which is fixedly sleeved on the outside of the floating bottle.

[0020] Compared with the prior art, this utility model provides a biofilm reactor wastewater treatment device, which has the following beneficial effects:

[0021] 1. Through the structural design of the biofilm reactor wastewater treatment device, when wastewater flows into the biological treatment zone, microorganisms on the biofilm will transfer from the main body of wastewater to the surface of the biofilm through molecular diffusion. The microorganisms in the biofilm use these organic pollutants as a nutrient source and decompose them through their metabolic activities, reducing the eutrophication level of the water body. Simultaneously, the device uses floating bottles to provide buoyancy, allowing it to float semi-fixed on the water surface. This enables the device to adjust its position according to the distribution of wastewater, improving treatment efficiency.

[0022] 2. By pulling the elastic band, the distance between the elastic band and the mounting base can be increased. The floating bottle is then placed between them, and the clamping plate is adjusted to vertically overlap between the mounting base and the elastic band, thus forming a locking and limiting mechanism. Releasing the elastic band allows it to spring back and engage with the mounting base to clamp and limit the floating bottle. This installation method allows for quick assembly and disassembly, facilitating timely replacement of the floating bottle and effectively improving its installation stability. It solves the problems of traditional biological floating islands, which are difficult to adjust flexibly according to actual conditions such as wastewater quality and water flow direction, and require significant manpower and resources for maintenance, hindering long-term stable operation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the biofilm reactor wastewater treatment device of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the planting board of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the wire mesh cage after it has been filled.

[0027] Figure 4 This is a schematic diagram of the structure of the wire mesh cage before filling.

[0028] Figure 5 This is a schematic diagram of the floating positioning mechanism of this utility model;

[0029] Figure 6 This utility model Figure 4 A magnified view of a portion of point A in the middle.

[0030] [Explanation of Key Component Symbols]

[0031] 1. Net cage; 2. Planting board; 3. Planting area; 4. Biofilm; 5. Connecting rod; 6. Connecting hole; 7. Limiting platform; 8. Connecting belt; 9. Elastic belt; 10. Card seat; 11. Floating bottle; 12. Card plate; 13. Filler. Detailed Implementation

[0032] The structure of the biofilm reactor wastewater treatment device will be further described in detail below with reference to the accompanying drawings and embodiments of this utility model.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments as described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 9 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] As per the instruction manual Figures 1-6 As shown, this utility model provides a technical solution:

[0038] A biofilm reactor wastewater treatment device includes a main frame, and an ecological treatment unit and a buoyancy positioning unit disposed on the main frame.

[0039] Specifically, the main frame consists of a topless net cage 1 forming the reactor body. The side walls of the net cage 1 are made of porous mesh material, which ensures water flow and intercepts internal packing material. Biofilm attachment components are arranged circumferentially along the bottom outer edge of the net cage 1 to form an annular biological treatment zone, providing an attachment carrier for nitrifying / denitrifying microorganisms. The nitrifying / denitrifying microorganisms convert ammonia nitrogen into nitrogen gas.

[0040] The ecological treatment unit includes a modular planting board 2 located at the upper opening of the net cage 1. The planting board 2 divides the net cage 1 longitudinally into an aquatic plant planting area and a filler layer. The aquatic plant planting area is located above the planting board 2 and can cultivate emergent plants to construct an ecological purification system. The roots of the emergent plants extend to the filler layer. Emergent plants, such as reeds and calamus, directly absorb nitrogen and phosphorus nutrients from the water through their roots and promote aerobic microbial metabolism through root oxygen secretion. The filler layer is located between the planting board 2 and the bottom of the net cage 1 and is filled with lightweight porous planting filler 13 such as expanded clay pebbles and volcanic rock, forming an immobilized microbial treatment area. The lightweight porous planting filler 13 adsorbs organic matter, enhancing the adsorption and degradation of organic matter.

[0041] The buoyancy positioning unit is a floating positioning mechanism integrated on the outer wall of the net cage 1. The floating positioning mechanism distributed circumferentially on the outside of the net cage 1 provides buoyancy support, allowing the device to float on the water surface. At the same time, by adding counterweights to the floating positioning mechanism, the counterweights can be adjusted to achieve device positioning, preventing displacement caused by water flow and maintaining the biological treatment area at the optimal water depth.

[0042] As described above, this device achieves synergistic treatment through three-dimensional partitioning: the plant roots in the upper aquatic plant planting area absorb nitrogen and phosphorus nutrients; the middle packing layer intercepts suspended solids and enriches microorganisms; and the lower biofilm attachment component expands the attachment area for microorganisms, forming a composite purification system of "plant-microorganism". The floating positioning mechanism ensures that the device adapts to different water level changes, making it particularly suitable for in-situ remediation of open water bodies such as rivers and lakes.

[0043] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, planting areas 3 are set in sections on the planting board 2, which are used to plant aquatic plants and construct an ecological purification system.

[0044] In a preferred embodiment, such as Figure 3 , Figure 4 and Figure 6 As shown, a limiting platform 7 is provided inside the upper opening of the net box 1. The limiting platform 7 is used to limit the planting board 2 during installation and to ensure the stability of the planting board 2 during installation.

[0045] In a preferred embodiment, such as Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, several connecting holes 6 are provided on the side wall and bottom wall of the cage 1, which are used to connect the internal and external environments of the cage 1 through the connecting holes 6 during use, so as to ensure the exchange of materials between the inside and outside of the cage 1.

[0046] In a preferred embodiment, such as Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the biofilm attachment assembly includes several biofilms 4, which are fixed to the lower surface of the net cage 1 by rigid connecting rods 5. This ensures that the position of the biofilms 4 is fixed during use, providing attachment points for microorganisms to metabolize organic pollutants in the wastewater. The connecting rods 5 ensure that the biofilm 4 carrier units maintain a stable spacing under complex hydraulic conditions.

[0047] It should be noted that the biofilm 4 is made of filamentous or membrane-like material, and its huge specific surface area provides an ideal attachment and growth site for microorganisms. The connecting rod 5 is a rigid component made of steel bars or similar materials. Several biofilms 4 form a ring-shaped biological treatment zone for enriching nitrifying / denitrifying bacteria and polyphosphate-accumulating bacteria.

[0048] In a preferred embodiment, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the floating positioning mechanism includes a connecting belt 8 and floating bottles 11. The connecting belt 8 is fixedly installed on the outer wall of the net cage 1, and an elastic belt 9 is connected to the outer wall of the connecting belt 8. The elastic belt 9 works in conjunction with the floating bottles 11. The floating bottles 11 are installed on the outer wall of the net cage 1 via the elastic belt 9. There are several floating bottles 11, which are evenly distributed on the left and right sides of the net cage 1 in a left-right symmetrical structure. This allows the floating island device to be evenly buoyed from both sides, thereby improving the stability of the floating island device.

[0049] Specifically, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the floating positioning mechanism also includes a card holder 10, which is located on the outside of the connecting strip 8 at the location of the elastic strip 9. An arc groove is provided on one side of the outer wall of the card holder 10. The arc groove can fit against the outer wall of the floating bottle 11, thereby increasing the contact area between the card holder and the floating bottle 11 and improving the installation stability of the floating bottle 11.

[0050] Specifically, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the floating positioning mechanism also includes a clamping plate 12, which is fixedly sleeved on the outside of the floating bottle 11 to provide auxiliary fixation for the floating bottle 11.

[0051] The implementation principle of the biofilm reactor wastewater treatment device described in this embodiment is as follows:

[0052] Biofilm 4 is suspended below net cage 1. Before starting the device, specific microbial communities are inoculated into the wastewater. These microorganisms gradually attach to the surface of biofilm 4 and continuously grow and reproduce under suitable environmental conditions, forming a stable biofilm 4 structure. When wastewater flows through the biological treatment zone, organic pollutants in the wastewater are transferred from the main body of wastewater to the surface of biofilm 4 through molecular diffusion. The microorganisms in biofilm 4 use these organic pollutants as a nutrient source and decompose them through their own metabolic activities, reducing the eutrophication level of the water body. The entire floating island device is provided with buoyancy by floating bottles 11, allowing the entire device to float on the water surface. This allows the floating island device to be in a semi-fixed state on the water surface, so that its position can be adjusted at any time according to the distribution of wastewater, thereby improving treatment efficiency.

[0053] When installing the float bottle 11, first pull the elastic band 9 outward to stretch and deform it, thereby increasing the distance between it and the mounting bracket 10. Then, place the float bottle 11 between the mounting bracket 10 and the elastic band 9, and adjust the direction of the float bottle 11 so that the mounting plate 12 on the float bottle 11 is vertically engaged between the mounting bracket 10 and the elastic band 9. After the adjustment and placement are completed, the elastic band 9 can be released. At this time, the elastic band 9 will spring back and return to its original position, thus adhering tightly to the float bottle 11 and cooperating with the mounting bracket 10 to form a clamping and limiting effect on the float bottle 11. This completes the installation of the float bottle 11. This installation method allows for quick assembly and disassembly, facilitates timely replacement of the float bottle 11, and effectively improves the installation stability of the float bottle 11.

[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A biological membrane reactor sewage treatment apparatus, characterized by comprising: The application relates to a biological reactor, which comprises the following parts: a main frame, which is composed of a net cage (1) without a top cover, a biofilm adhesion assembly arranged on the outer periphery of the bottom of the net cage (1) to form a ring-shaped biological treatment area; an ecological treatment unit, which comprises a modular planting plate (2) arranged at the upper opening of the net cage (1) and longitudinally divides the net cage (1) into a hydrophyte planting area and a filler layer through the planting plate (2); a buoyancy positioning unit, which is a floating positioning mechanism integrated on the outer wall of the net cage (1).

2. A biological membrane reactor sewage treatment plant as claimed in claim 1, characterised in that, The hydrophyte planting area is located above the planting plate (2); the filler layer is located between the planting plate (2) and the bottom of the net cage (1) and is filled with planting fillers (13).

3. A biological membrane reactor sewage treatment plant as claimed in claim 1, characterised in that, The planting plate (2) is divided into planting areas (3).

4. A biological membrane reactor sewage treatment plant as claimed in claim 1, wherein, A limiting table (7) is arranged on the inner side of the upper end opening of the net cage (1) and is matched with the planting plate (2).

5. A biofilm reactor wastewater treatment device as claimed in claim 1, wherein, A plurality of communication holes (6) are arranged on the side wall and the bottom wall of the net cage (1).

6. A biological membrane reactor sewage treatment plant as claimed in claim 1, wherein, The biofilm adhesion assembly comprises a plurality of biofilms (4) which are fixed on the lower side surface of the net cage (1) through hard connecting rods (5).

7. A biofilm reactor wastewater treatment device as claimed in claim 1, wherein, The floating positioning mechanism comprises a connecting belt (8) and a floating bottle (11), the connecting belt (8) is fixedly arranged on the outer wall of the net cage (1) and is provided with an elastic belt (9) on the outer side wall of the connecting belt (8); the floating bottle (11) is fixed on the outer wall of the net cage (1) through the elastic belt (9).

8. A biofilm reactor sewage treatment apparatus as claimed in claim 7, wherein, The number of the floating bottles (11) is several, and the floating bottles (11) are symmetrically and uniformly distributed on the two sides of the net cage (1).

9. A biofilm reactor sewage treatment plant as claimed in claim 7, wherein, The floating positioning mechanism further comprises a clamping seat (10), the clamping seat (10) is arranged on the outer side of the connecting belt (8) at the position of the elastic belt (9) and is provided with a circular arc groove on the outer wall of one side of the clamping seat (10) to be clamped with the floating bottle (11).

10. A biofilm reactor sewage treatment plant as claimed in claim 7, wherein, The floating positioning mechanism further comprises a clamping plate (12), the clamping plate (12) is fixedly sleeved on the outer side of the floating bottle (11).

Images