Bacteria-algae symbiotic bio-membrane reactor

Abstract

The utility model provides an algal-bacterial symbiotic bio-membrane reactor which comprises a treatment pond, a guide plate is arranged in the treatment pond, a gallery is formed in the treatment pond through the guide plate, the gallery comprises a plurality of branch channels which are sequentially communicated to form a ring shape, each branch channel is provided with a culture assembly, suspended filler is further arranged in the treatment pond, and the suspended filler is arranged in the treatment pond. The suspended filler is scattered in each branch channel; the culture assembly comprises a rotating shaft with one end rotationally arranged on the flow guide plate, a filler rotating disc arranged on the rotating shaft and a light-emitting part arranged in the branch channel, the filler rotating disc comprises a support, paddles arranged on the support and a fixed filler used as a carrier of a bacteria-algae biological membrane, and the support is arranged on the rotating shaft in a sleeving mode. The sewage treatment device has the advantage of high sewage treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment, and in particular to a bacterial-algae symbiotic biofilm reactor. Background Technology

[0002] The symbiotic biofilm technology is a technique that combines the interaction between algae and bacteria to form a composite biofilm to remove pollutants. Using the symbiotic biofilm technology for wastewater treatment can not only effectively treat wastewater, but also has low energy consumption and good environmental friendliness.

[0003] Specifically, the bacterial-algae symbiotic biofilm technology utilizes bacteria to decompose organic matter, converting it into simple nutrients usable by algae. The algae, in turn, produce oxygen through photosynthesis, improving dissolved oxygen levels in the water and promoting bacterial metabolism. This symbiotic process transforms organic matter, reducing the accumulation of undegraded substances. Nutrient cycling enables the system to operate continuously and efficiently, significantly improving decontamination efficiency. Furthermore, the formation of the biofilm provides a stable microenvironment, enhancing microbial growth and metabolism, increasing contact with pollutants, and allowing pollutants to be removed during the growth of algae and bacteria.

[0004] To facilitate the use of algae-bacterial symbiotic biofilm technology for reactions, engineers have developed related reactors. For example, the invention with patent publication number CN108892228A relates to an algae-bacterial composite biofilm wastewater treatment device, which includes a treatment tank, a mesh cage set inside the treatment tank near the middle of the treatment tank, an aeration ring pipe fixedly installed inside the mesh cage, an air pump connected to an air source and a water pump connected to a wastewater source set outside the treatment tank, the air outlet of the air pump connected to the aeration ring pipe, and the outlet of the water pump connected to the treatment tank. The treatment tank is made of transparent tempered glass, and a lamp holder is fixedly installed on the side wall of the treatment tank, with several fluorescent lamps installed on the side of the lamp holder near the treatment tank. During use, the biofilm is inoculated with relevant algae and bacteria. A water pump introduces wastewater into the treatment tank through the inlet pipe, and an air pump introduces air into the aeration ring pipe and out of the aeration ring pipe. The net cage buffers and disperses the aerated gas. Bacterial respiration consumes oxygen and produces carbon dioxide, while algae consume carbon dioxide in the wastewater through photosynthesis and produce oxygen. The process absorbs and decomposes nitrogen and phosphorus compounds in the wastewater.

[0005] However, in reactors using related technologies, the contact between wastewater and bacteria / algae is insufficient, affecting the interaction between bacteria and algae and resulting in poor wastewater treatment. Utility Model Content

[0006] In order to improve the problem of poor sewage treatment effect caused by the interaction between bacteria and algae, this utility model provides a highly efficient bacterial-algae symbiotic biofilm reactor for sewage treatment.

[0007] This utility model provides a bacterial-algae symbiotic biofilm reactor, which adopts the following technical solution:

[0008] A symbiotic biofilm reactor for bacteria and algae includes a treatment tank. A flow guide plate is provided in the treatment tank to form a corridor in the treatment tank. The corridor includes multiple channels connected in a ring in sequence. Each channel is provided with a cultivation component. Suspended packing material is also provided in the treatment tank and is scattered in each channel.

[0009] The cultivation assembly includes a rotating shaft rotatably mounted on a guide plate at one end, a packing disc mounted on the rotating shaft, and a light-emitting element mounted in the channel. The packing disc includes a support, blades mounted on the support, and a fixed packing material used as a carrier for the bacterial and algal biofilm. The support is sleeved on the rotating shaft.

[0010] With the above technical solution, when in use, activated sludge is added and run for a period of time to achieve initial biofilm formation, and then microalgae are added and run for a period of time to achieve secondary biofilm formation, so that biofilms are formed on both suspended and fixed packing materials. The use of both fixed and suspended packing materials helps to ensure a sufficient amount of biofilm.

[0011] Next, wastewater is introduced into the corridor and mixed with the biofilm to form a mixed liquid. Algae then grow using carbon dioxide or inorganic carbon sources through photosynthesis, producing sufficient oxygen to facilitate the degradation of organic matter by aerobic bacteria. The metabolic products of the aerobic bacteria (such as inorganic nitrogen and phosphorus) are assimilated by the algae, thereby removing pollutants from the wastewater. A rotating shaft drives the packing disc to rotate, propelling the mixed liquid forward to the next channel. Simultaneously, light is provided by luminescent components. The continuous circulation of the mixed liquid along the corridor ensures sufficient contact between the biofilm and the wastewater, allowing the algae to receive uniform light and fully utilize their photosynthetic abilities, thus making water treatment more efficient.

[0012] Preferably, the suspended packing material is polyurethane packing material, and the fixed packing material is bio-rope packing material.

[0013] Through the above technical solutions, polyurethane packing material possesses porous characteristics, which facilitates a larger specific surface area, promotes effective gas exchange, and supports photosynthesis. Furthermore, the lightweight nature of polyurethane packing material ensures good suspension in water, preventing sedimentation and ensuring uniform distribution of bacteria and algae. The bio-rope packing material provides abundant attachment surface, which is beneficial for the growth of bacteria and algae.

[0014] Preferably, the filling ratio of the suspended packing is 10% to 20%.

[0015] Through the above technical solutions, the filling ratio of suspended packing material is 10% to 20%, which ensures that bacteria and algae are evenly distributed on the surface of the packing material, avoids overcrowding, promotes better photosynthesis and nutrient absorption, and also helps maintain the flow of water and reduce the risk of blockage between packing materials.

[0016] Preferably, the end of the rotating shaft away from the guide plate extends out of the treatment tank, and a drive motor is connected to the outer wall of the treatment tank. The drive end of the drive motor is connected to the end of the rotating shaft that extends out of the treatment tank.

[0017] With the above technical solution, the rotating shaft can be driven by the drive motor, and the rotating shaft drives the packing disc to rotate, thereby driving the mixture to flow in the forward direction to the next channel.

[0018] Preferably, the blades are provided in two sets, and the two sets of blades are arranged opposite each other on both sides of the support. The blades in one set are evenly distributed along the circumferential direction of the rotating shaft.

[0019] Through the above technical solution, the relative distribution of the two sets of blades can form a more uniform liquid flow in the reactor.

[0020] Preferably, the light-emitting element is an LED light bar, and the illuminance of the light-emitting element is 3000 to 10000 lux.

[0021] The above technical solution effectively supports the photosynthesis of algae in the light intensity range of 3,000 to 10,000 lux, which is beneficial to promoting the growth rate of algae and fungi.

[0022] Preferably, the treatment pool is provided with a guide edge at the junction of two adjacent channels, and the guide edge is arc-shaped.

[0023] The above technical solution allows the arc shape of the guide edge to guide the mixture to the next channel, thus making the mixture flow more smoothly.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] By driving the rotating shaft to rotate, the rotating shaft drives the packing disc to rotate, driving the mixed liquid to flow in the forward direction to the next channel. At the same time, the light source provides illumination. The mixed liquid continuously circulates along the channel, so that the biofilm with sufficient content can fully contact the sewage and the algae can receive light evenly, giving full play to the photosynthesis of the algae, thus making the water treatment more efficient.

[0026] By fully contacting and effectively converting organic matter and decomposing nutrients, the accumulation of undegraded substances is reduced, thus lowering the sludge generation caused by excess nutrients. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a top view of the overall structure of an embodiment of this utility model.

[0029] Figure 2 This is a schematic diagram of the lane division in an embodiment of this utility model.

[0030] Figure 3 This is a schematic diagram of the structure of the packing turntable in an embodiment of this utility model.

[0031] The component designations are as follows: 1. Treatment tank; 2. Guide plate; 3. Channel; 31. Divider; 4. Suspended packing; 5. Rotating shaft; 6. Packing turntable; 61. Support; 62. Paddle; 63. Fixed packing; 7. Light-emitting component; 8. Guide edge. Detailed Implementation

[0032] The following will refer to the appendix in the embodiments of this utility model. Figures 1 to 3 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] A symbiotic biofilm reactor for bacteria and algae, referring to Figure 1 The system includes a treatment tank 1 with an open top. The treatment tank 1 is cylindrical and has a straight-sided elliptical cross-section. A guide plate 2 is installed inside the treatment tank 1. The guide plate 2 is a long plate and is distributed along the long axis of the treatment tank 1. The guide plate 2 is fixedly connected to the bottom of the treatment tank 1. The guide plate 2 forms a ring-shaped corridor 3 inside the treatment tank 1.

[0034] Reference Figure 1 and Figure 2 The corridor 3 includes multiple channels 31 connected in an elliptical ring, and each channel 31 is equipped with a cultivation component. The treatment tank 1 is also equipped with suspended packing material 4, which serves as a carrier for bacterial and algal biofilms, and the suspended packing material 4 is scattered in each channel 31.

[0035] The suspended filler 4 is a polyurethane filler, with a filling ratio of 10% to 20%. Polyurethane filler has porous properties, providing a larger specific surface area, promoting effective gas exchange, and supporting photosynthesis. Furthermore, its lightweight nature ensures good suspension in water, preventing sedimentation and ensuring uniform distribution of bacteria and algae. The 10% to 20% filling ratio of the suspended filler 4 ensures uniform distribution of bacteria and algae on the filler surface, avoiding overcrowding, promoting better photosynthesis and nutrient absorption, and also helps maintain water flow, reducing the risk of clogging between filler materials.

[0036] In use, activated sludge is added and run for a period of time to achieve initial biofilm formation, and then microalgae is added and run for a period of time to achieve secondary biofilm formation. It should be noted that in this embodiment, the initial concentration of activated sludge is 3000 to 5000 mg / L, and Chlorella is used as the microalgae. The mass ratio of added microalgae to activated sludge is 1:5, thereby forming a biofilm on the suspended packing 4 and the culture component. Next, the wastewater is introduced into the corridor 3 and mixed with the biofilm to form a mixed liquid. Then, the cultivation components on each branch channel 31 provide light sources to provide light conditions for algal photosynthesis. The cultivation components on each branch channel 31 drive the mixed liquid to flow to the next branch channel 31, so that the mixed liquid continuously circulates along the corridor 3. This allows the bacteria and algae to fully contact the organic matter and nutrients in the wastewater, and makes the light source more even for the algae. The algae can fully utilize carbon dioxide or inorganic carbon sources for photosynthesis to grow and produce enough oxygen to facilitate the degradation of organic matter by aerobic bacteria. The metabolic products of aerobic bacteria (such as inorganic nitrogen and phosphorus) are assimilated by the algae, thereby removing pollutants from the wastewater.

[0037] Reference Figure 2 In this embodiment, there are two channels 31, which are aligned and connected end to end, and are opposite each other along the width of the treatment tank 1. Two sets of culture components are provided corresponding to the number of channels 31, and the two sets of culture components are arranged one-to-one on the two channels 31, and the direction in which the culture components drive the mixed liquid into the next channel 31 is the forward direction.

[0038] Specifically, refer to Figure 1 and Figure 2The cultivation assembly includes a rotating shaft 5 rotatably mounted on a guide plate 2, a packing disc 6 sleeved on the rotating shaft 5, and a light-emitting element 7 disposed within the treatment tank 1. The rotating shaft 5 is distributed along the width direction of the guide plate 2, with one end rotatably connected to one side of the guide plate 2. The rotating shaft 5 is located at the front section in the forward direction, and the end of the rotating shaft 5 away from the guide plate 2 extends out of the treatment tank 1. A drive motor (not shown in the figure) is connected to the outer wall of the treatment tank 1. The drive end of the drive motor is connected to the end of the rotating shaft 5 extending out of the treatment tank 1, thereby driving the rotating shaft 5 to rotate. The rotating shaft 5 drives the packing disc 6 to rotate, thereby driving the mixture to flow in the forward direction to the next channel 31.

[0039] Reference Figure 2 and Figure 3 The packing disc 6 includes a support 61, blades 62 mounted on the support 61, and fixed packing material 63 serving as a carrier for the bacterial and algal biofilm. The support 61 is disc-shaped and is fitted onto the rotating shaft 5. The blades 62 are elongated plates, distributed from near the center of the support 61 towards the circumference. Two sets of blades 62 are provided, each set positioned on opposite sides of the support 61. Each set contains four blades 62, evenly spaced along the circumferential direction of the rotating shaft 5. When the rotating shaft 5 rotates, it drives the support 61 and blades 62 to rotate. The rotation of the blades 62 generates thrust, propelling the mixture forward to the next channel 31. The relative distribution of the two sets of blades 62 creates a more uniform liquid flow within the reactor.

[0040] Reference Figure 2 and Figure 3 The fixed packing material 63 is a bio-rope packing material, which is wrapped around the support 61. The bio-rope packing material provides abundant attachment surface, which is conducive to the growth of bacteria and algae. Through primary and secondary biofilm formation, biofilms are formed on both the suspended packing material 4 and the fixed packing material 63. When the support 61 rotates, it drives the fixed packing material 63 to rotate, thereby increasing the mixing of water flow, increasing the contact between sewage and the fixed packing material 63, accelerating the metabolism of microorganisms, and allowing the biofilm to detach and renew better, thus improving water treatment capacity.

[0041] In addition, refer to Figure 2 and Figure 3Two packing discs 6 are provided, aligned in the same direction and arranged along the length of the shaft 5. This arrangement increases the thrust and the area of ​​the fixed packing 63. The fixed packing 63 and the suspended packing 4 ensure a sufficient biofilm content. By driving the water flow forward to the next channel 31, the biofilm and wastewater are in full contact, resulting in more efficient water treatment. This full contact effectively converts organic matter and decomposes nutrients, reducing the accumulation of undegraded substances and minimizing sludge formation caused by excess nutrients.

[0042] Reference Figure 1 and Figure 2 The light-emitting element 7 is an LED light bar, which is elongated and distributed along the width of the guide plate 2. The light-emitting element 7 is located at the rear section of the channel 31 in the forward direction. One end of the light-emitting element 7 is connected to the guide plate 2, and the other end is connected to the wall of the treatment tank 1. Multiple light-emitting elements 7 are provided, and they are evenly spaced along the length of the guide plate 2. The light intensity of the light-emitting element 7 is 3000 to 10000 lux, which effectively supports the photosynthesis of algae and promotes the growth rate of algae and bacteria. By continuously driving the mixed liquid into the next channel 31, the light-emitting element 7 continuously provides illumination, ensuring that the algae in the mixed liquid receive uniform light, thus fully utilizing their photosynthetic capacity to produce sufficient oxygen. This oxygen is then provided to aerobic bacteria, preventing insufficient oxygen production due to uneven algae distribution or uneven light exposure.

[0043] In addition, refer to Figure 1 and Figure 2 The treatment tank 1 is provided with guide edges 8 at the junction of two adjacent channels 31 (that is, the treatment tank 1 is provided with guide edges on both sides opposite each other along the long axis). The guide edges 8 are arc-shaped, and the arc shape of the guide edges 8 is conducive to guiding the mixed liquid to the next channel 31, thereby making the mixed liquid flow more smoothly.

[0044] The implementation principle of this application is as follows: when in use, activated sludge is added and run for a period of time to achieve initial biofilm formation, and then microalgae are added and run for a period of time to achieve secondary biofilm formation, so that biofilms are formed on both the suspended packing 4 and the fixed packing 63. The fixed packing 63 and the suspended packing 4 help to ensure a sufficient amount of biofilm.

[0045] Next, the wastewater is introduced into corridor 3 and mixed with the biofilm to form a mixed liquid. Algae then grow using carbon dioxide or inorganic carbon sources through photosynthesis, producing sufficient oxygen to facilitate the degradation of organic matter by aerobic bacteria. The metabolic products of the aerobic bacteria (such as inorganic nitrogen and phosphorus) are assimilated by the algae, thereby removing pollutants from the wastewater. A drive motor drives the rotating shaft 5, which in turn rotates the packing disc 6, propelling the mixed liquid forward to the next channel 31. Simultaneously, light is provided by the light-emitting element 7. The continuous circulation of the mixed liquid along corridor 3 ensures full contact between the biofilm and the wastewater, allowing the algae to receive uniform light and fully utilize their photosynthetic abilities. This makes water treatment more efficient, effectively converting organic matter and decomposing nutrients through sufficient contact, reducing the accumulation of undegraded substances and minimizing sludge formation caused by excess nutrients.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A symbiotic biofilm reactor comprising a treatment tank (1), characterized in that: The treatment tank (1) is provided with a flow guide plate (2), which forms a corridor (3) in the treatment tank (1). The corridor (3) includes multiple channels (31) connected in a ring in sequence. Each channel (31) is provided with a culture component. The treatment tank (1) is also provided with a suspended packing material (4), which is scattered in each channel (31). The cultivation assembly includes a rotating shaft (5) rotatably mounted on a guide plate (2), a packing disc (6) mounted on the rotating shaft (5), and a light-emitting element (7) mounted in the channel (31). The packing disc (6) includes a support (61), a paddle (62) mounted on the support (61), and a fixed packing material (63) used as a carrier for the bacterial and algal biofilm. The support (61) is sleeved on the rotating shaft (5).

2. The algae-bacterial symbiotic biofilm reactor according to claim 1, characterized in that: The suspended packing (4) is a polyurethane packing, and the fixed packing (63) is a bio-rope packing.

3. The algae-bacterial symbiotic biofilm reactor according to claim 1, characterized in that: The filling ratio of the suspended filler (4) is 10% to 20%.

4. The algae-bacterial symbiotic biofilm reactor according to claim 1, characterized in that: The end of the rotating shaft (5) away from the guide plate (2) extends out of the treatment tank (1). A drive motor is connected to the outer wall of the treatment tank (1), and the drive end of the drive motor is connected to the end of the rotating shaft (5) that extends out of the treatment tank (1).

5. The algae-bacterial symbiotic biofilm reactor according to claim 1, characterized in that: The blades (62) are provided in two sets, and the two sets of blades (62) are arranged opposite to each other on both sides of the support (61). The blades (62) in one set are evenly distributed along the circumferential direction of the rotating shaft (5).

6. The algae-bacterial symbiotic biofilm reactor according to claim 1, characterized in that: The light-emitting element (7) is an LED lamp bar, and the light intensity of the light-emitting element (7) is 3000 to 10000 lux.

7. The algae-bacterial symbiotic biofilm reactor according to claim 1, characterized in that: The treatment pool (1) is provided with guide edges (8) at the junction of two adjacent channels (31), and the guide edges (8) are arc-shaped.

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