Bacteria-algae reactor and treatment system thereof

Abstract

The utility model discloses a bacteria-algae reactor and treatment system, wherein the bacteria-algae reactor comprises a reactor cylinder body which is a transparent glass structure, the reactor cylinder body is used for limiting a sewage reaction area, a guide plate is installed in the sewage reaction area and is fixedly connected with the reactor cylinder body, a plurality of light plates are arranged on the side wall of the reactor cylinder body, and the light plates are arranged on the side wall of the reactor cylinder body. In the axial direction of the reactor cylinder, the light plates are spirally distributed to form a light band assembly. The application accidentally finds that the reactor is beneficial to efficiently and rapidly generating large-particle-size ABGS sludge, the physicochemical property and decontamination effect of ABGS are superior to those of a conventional reactor, the reactor enables algae to be fixed on AGS granular sludge within 7 days, granulation is completed within 20 days, the average particle size reaches 1.8 mm, and sludge particles are more uniform, compact and stable.

Description

Technical Field

[0001] This utility model relates to the field of reactor equipment technology, and in particular to a bacterial and algal reactor and treatment system. Background Technology

[0002] An emerging wastewater treatment technology is the ABGS (Algae and Microorganisms Granular Sludge) technology. The ABGS sludge generation system on which this technology relies is called the Algae-Microorganism Reaction Treatment System. The reaction mechanism of this system is called the Algae-Microorganism Reactor, which can be used to cultivate and treat microorganisms and algae to form granular sludge and treat wastewater based on granular sludge.

[0003] It is not easy for bacteria and algae to form an effective dense granular structure. Most current bacteria and algae reactors are built by themselves. One reactor that can be used is the photo-sequential batch reactor. However, apart from methods that rely on special reagents (such as specific algal mycelial particles), traditional reactors are complicated to install. Algae easily adhere to the reactor wall. Over time, the dense growth of algae will block light. Moreover, the granulation cycle is long, the particle size uniformity is poor, the particle loss rate is high, and the reactor efficiency is low. Utility Model Content

[0004] To address the problems of traditional reactors, this invention provides a microbial and algal reactor and treatment system, the technical solution of which is as follows:

[0005] A first aspect of this application provides a microbial and algal reactor, comprising:

[0006] The reactor shell is a transparent glass structure, which is used to define the wastewater reaction zone, and the wastewater reaction zone is used to contain granular sludge, etc.

[0007] A guide plate is installed in the wastewater reaction zone and is fixedly connected to the reactor cylinder.

[0008] Multiple light plates are disposed on the side wall of the reactor cylinder, and the multiple light plates are spirally distributed in the axial direction of the reactor cylinder to form a light strip assembly.

[0009] In some embodiments, the reactor body includes a first body and a second body arranged coaxially, the first body being located inside the second body, and the wastewater reaction zone being located inside the first body.

[0010] In some embodiments, the reactor cylinder is a frustum-shaped structure, with its opening (top) inner diameter being larger than its bottom inner diameter.

[0011] In some embodiments, a plurality of light plates are installed between the first cylinder and the second cylinder, and the surfaces of the plurality of light plates may be covered with a protective layer.

[0012] In some embodiments, along the axial direction of the reactor body, a plurality of connecting pipes are installed at intervals on the reactor body, and the wastewater reaction zone is connected to the outside through the connecting pipes.

[0013] In some embodiments, the guide plate has a conical spiral structure with a spiral angle of 30°-45°, and the surface of the guide plate has multiple through holes.

[0014] In some embodiments, the top of the reactor cylinder is provided with a top cover, the top cover including a first flange and a first flange cover, the first flange being detachably connected to the cylinder, and the first flange being connected to the first flange cover via a connector.

[0015] In some embodiments, a base is installed at the bottom of the reactor body, the base including a second flange and a second flange cover, the second flange cover being detachably connected to the reactor body.

[0016] In some embodiments, a sealing element is provided between the flange and the flange cover, and the sealing element may be a sealing ring or a sealing gasket.

[0017] The flange cover can be a blind flange or a multi-claw protective cover; the diameter of the base can be smaller than the diameter of the top cover.

[0018] In some embodiments, the inner wall of the first cylinder has a hydrophobic nanocoating.

[0019] A second aspect of this application provides a bacterial and algal reaction treatment system, including a drainage tank, a water inlet tank, an air pump, and control equipment, as well as the bacterial and algal reactor described in the first aspect;

[0020] The drainage tank is connected to the algae and bacteria reactor via a diaphragm pump, and the inlet tank is connected to the algae and bacteria reactor via a peristaltic pump.

[0021] The technological advancements achieved by this invention compared to existing technologies are as follows:

[0022] This invention features a reactor cylinder with a transparent glass structure and multiple spirally distributed light plates, ensuring sufficient and uniform light exposure throughout the wastewater reaction zone. This promotes the uniform growth and metabolic activity of the bacterial and algal granular sludge, improving the consistency and stability of the sludge cultivation. Unexpectedly, this application reveals that this reactor is conducive to the efficient and rapid generation of large-particle-size ABGS sludge. The physicochemical properties and decontamination effect of ABGS are superior to those of conventional reactors. Analysis shows that the baffles create turbulence, promoting rapid and complete reaction between bacteria and algae. The frustum-shaped reactor also further facilitates bacterial and algal symbiosis, resulting in the efficient and rapid formation of uniformly sized and reliable ABGS sludge. This reactor immobilizes algae on AGS granular sludge in 7 days and completes granulation in 20 days, achieving an average particle size of 1.8 mm. The sludge particles are more uniform, dense, and stable. Attached Figure Description

[0023] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0024] In the attached diagram:

[0025] Figure 1 This is a structural diagram of an algae and bacteria reactor in one embodiment;

[0026] Figure 2 for Figure 1 Cross-sectional view of LL;

[0027] Figure 3 This is a schematic diagram of the algae and bacteria reactor of this utility model;

[0028] Figure 4 This is a schematic diagram of the light strip assembly in this utility model;

[0029] Figure 5 for Figure 4 Enlarged view of region H in the middle;

[0030] Figure 6 This is a schematic diagram of the guide plate in this utility model;

[0031] Figure 7 for Figure 6 Enlarged view of region A in the middle;

[0032] Figure 8 This is a schematic diagram of the reactor cylinder in this utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the algae and bacteria reactor in another embodiment;

[0034] Figure 10 This is a schematic diagram of the base in one embodiment;

[0035] Figure 11 This is a schematic diagram of the base in another embodiment;

[0036] Figure 12 This is a schematic diagram of the bacterial and algal reaction treatment system of this utility model;

[0037] Figure 13 A bar graph showing the particle size distribution of granular sludge in the reactor on day 50;

[0038] Figure 14 A bar and line graph showing the changes in sludge concentration within the reactor;

[0039] Figure 15 This is a bar graph showing the changes in sludge settling performance within the reactor. Detailed Implementation

[0040] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this utility model will be described below with reference to the accompanying drawings.

[0041] like Figures 1 to 11 As shown, this utility model discloses a microbial-algae reactor. The microbial-algae reactor 100 includes a reactor cylinder 1, a guide plate 3, and multiple smooth plates 4. The microbial-algae reactor provides a biological treatment environment, removing organic matter and pollutants such as nitrogen and phosphorus from wastewater by utilizing the formation of granular aggregates by biological organisms under sufficient oxygen conditions. The reactor cylinder 1 is a transparent glass structure. The transparent glass is made of high-strength, corrosion-resistant material, which extends its service life. The transparent glass structure of the reactor cylinder 1 allows operators to clearly and intuitively observe the reaction process. The reactor cylinder 1 defines the wastewater reaction zone 2, which contains granular sludge, etc., and self-aggregating granular sludge (ABGS) obtained by the combination and growth of microalgae and aerobic granular sludge. The microbial-algae granular sludge possesses the efficient degradation capacity of microorganisms for pollutants and the strong assimilation and uptake capacity of algae for organic matter such as carbon, nitrogen, and phosphorus in wastewater. Algae photosynthesis releases oxygen. Bacteria and microorganisms in sludge utilize oxygen during the degradation of organic matter, converting organic carbon into carbon dioxide and releasing it. At the same time, when algae are photosynthesizing, they not only utilize nitrogen sources and phosphates in the wastewater, but also absorb the carbon dioxide produced by the bacteria and synthesize the nutrients needed for their own growth and reproduction. In this process, they release oxygen to provide oxygen for aerobic bacteria.

[0042] A flow guide plate 3 is installed in the wastewater reaction zone 2 and is fixedly connected to the reactor body 1 to ensure the stability of the flow guide plate 3 during use. The flow guide plate 3 is used to guide the movement of algae and AGS granular sludge in the wastewater reaction zone 2, thereby enhancing the collision and aggregation between them. The flow guide plate 3 is made of stainless steel with good corrosion resistance and mechanical properties, which can ensure overall performance and service life. Multiple light plates 4 are set on the side wall of the reactor body 1. Multiple light plates 4 provide light sources for the algae and bacteria reactor 100, so that algae can absorb nutrients such as nitrogen and phosphorus in the wastewater through assimilation and grow and reproduce under light conditions. In this process, algae release oxygen and small molecule organic matter, which can provide a living environment for most aerobic bacteria. The light plates 4 can be adapted according to needs. In one example, the light plates 4 are integrated LED light plates, and multiple LED light plates are connected end to end and installed in the outer shell of the reactor body 1 to form an integrated structure. When a certain LED light plate fails, only the corresponding LED light plate needs to be removed for repair or replacement without affecting the light source of other parts. For example, in the axial direction of reactor cylinder 1 (such as...) Figure 3 As shown in the z-direction, multiple light plates 4 are spirally distributed and wound around the reactor cylinder 1 to form a light strip assembly. The spiral light strip assembly provides sufficient light conditions to support the photosynthesis of bacteria and algae inside the reactor cylinder 1. The light strip assembly not only improves the utilization rate of light, but also enhances the uniformity of light distribution inside the reactor cylinder 1 through the spiral arrangement, so that the light source is uniformly covered in all directions, promoting the growth and activity of bacteria and algae granular sludge.

[0043] In some embodiments, the reactor shell 1 has a double-glass structure. This double-glass structure allows for temperature control and provides good corrosion resistance and visibility. In one example, such as... Figures 1 to 3As shown, the reactor cylinder 1 includes a first cylinder 11 and a second cylinder 12 arranged coaxially. The first cylinder 11 is located inside the second cylinder 12, that is, the first cylinder 11 is the inner layer of the reactor cylinder 1. The first cylinder 11 has a wastewater reaction zone 2 inside. The first cylinder 11 is used to contain and cultivate bacterial and algal granular sludge. The shapes of the first cylinder 11 and the second cylinder 12 can be cylindrical structures, such as frustum conical structures, which can be adapted according to needs. For example, the first cylinder 11 has a frustum conical structure. The bottom diameter of the frustum conical first cylinder 11 is smaller, while the top diameter is larger, and is 1.5-2 times the bottom diameter. The first cylinder 11 with its truncated cone structure facilitates the formation of a higher sludge concentration at the bottom of the wastewater reaction zone 2, as gravity makes it easier for the sludge to aggregate at the bottom. Based on fluid dynamics principles, the truncated cone structure significantly alters the flow path of the internal fluids. During operation of the algae-bacterial reactor 100, the algae-bacterial granular sludge forms complex and efficient turbulence under the guidance of the first cylinder 11 with its truncated cone structure, achieving thorough and deep mixing. Simultaneously, the truncated cone structure enhances the collision and aggregation effect of the algae-bacterial granular sludge, shortening the granulation cycle from the traditional several months to 20-30 days, greatly improving production efficiency. The second cylinder 12 also adopts a truncated cone structure and is coaxially arranged with the first cylinder 11, thus ensuring a more stable overall structure of the reactor cylinder 1.

[0044] In some embodiments, such as Figures 1 to 5 As shown, multiple light plates 4 are installed between the first cylinder 11 and the second cylinder 12, thus not occupying the effective cultivation space of the wastewater reaction zone 2. This allows for full utilization of the internal space of the reactor cylinder 1, increasing the cultivation density of algae granular sludge and thereby increasing the yield of algae granular sludge per unit volume. The surfaces of the multiple light plates 4 are covered with a protective layer 5, which protects the light source effect and lifespan of the light plates 4. The protective layer 5 can be adapted as needed. In one example, the protective layer 5 is a polycarbonate protective plate. The polycarbonate protective plate can protect the light source of the light plate and has good high light transmittance. The high light transmittance of the polycarbonate protective plate is easy to clean and can effectively prevent dust and impurities from adhering to the surface of the light source, ensuring the stability of the illumination effect and ensuring that the light penetrates evenly into the interior of the wastewater reaction zone 2. At the same time, the spiral installation of multiple light plates 4 between the first cylinder 11 and the second cylinder 12 achieves 360-degree all-round illumination coverage, thereby simplifying the light source installation process, improving the uniformity of illumination, and making more efficient use of the space between the first cylinder 11 and the second cylinder 12 of the reactor cylinder 1.

[0045] In some embodiments, such as Figure 1 and Figure 2 As shown, along the axial direction of reactor cylinder 1 (e.g.) Figure 1As shown in the z-direction, multiple connecting pipes 6 are installed at intervals on the reactor cylinder 1. The interval installation ensures that water inlet or outlet channels are provided at different locations, thereby maintaining the uniformity of water flow in the wastewater reaction zone 2. The wastewater reaction zone 2 is connected to the outside through the connecting pipes 6, ensuring that the wastewater in the wastewater reaction zone 2 can be discharged smoothly and that water can be injected into the wastewater reaction zone 2. Water can be introduced or discharged as needed through the connecting pipes 6, ensuring the stable operation of the bacterial and algae granular sludge reaction process in the wastewater reaction zone 2, and also providing nutrients and oxygen for the growth of bacterial and algae granular sludge.

[0046] In some embodiments, such as Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown, the guide plate 3 has a conical spiral structure, which matches the first cylinder 11. That is, the diameter of the guide plate 3 gradually decreases from the top to the bottom to accommodate the first cylinder 11. The conical spiral guide plate 3 is circumferentially aligned with the first cylinder 11 (e.g., ...). Figure 1 The spiral arrangement (in the direction shown in Figure I) has a spiral angle of 30°-45° to accommodate the movement of algae and granular sludge. The surface of the guide plate 3 has multiple through holes 31, which can be square, circular, or other shapes, and can be adapted as needed. In one example, the spiral angle is 35° and the through holes 31 are circular. The guide plate 3 can guide algae and granular sludge to move spirally upward or downward in the wastewater reaction zone 2, thereby enhancing the collision and aggregation of algae and granular sludge, increasing the particle size uniformity of algae and granular sludge by 20-30%, and effectively improving product quality. The winding lines of the conical spiral structure of the guide plate 3 echo the truncated cone structure of the first cylinder 11, reflecting the organic combination of function and aesthetics.

[0047] In some embodiments, such as Figure 1 and Figure 9As shown, a top cover 7 is provided on the top of the reactor body 1. The top cover 7 is used to seal the top of the reactor body 1, ensuring the stability of the internal environment of the reactor, while providing necessary connection and sealing. The top cover 7 includes a first flange 71 and a first flange cover 72. The first flange 71 is detachably connected to the first body 11. The detachable connection method can be adapted as needed, so that during the installation process, the first flange 71 is tightly connected to the first body 11 to ensure the sealing of the top. However, when the operator performs maintenance and inspection, for example, when the guide plate 3 inside the wastewater reaction zone 2 malfunctions or needs to be replaced, the operator can remove the first flange 71 for replacement and maintenance. The first flange cover 72 is located above the first flange 71. The first flange 71 is connected to the first flange cover 72 by a connector 9 (e.g., bolts). The first flange cover 72 ensures the sealing of the top cover 7, preventing external impurities or air from entering the reactor body 1 during the reaction process. It also provides a certain operating space when the reactor body 1 needs to be vented or maintained.

[0048] In some embodiments, such as Figure 1 and Figure 2 , Figure 9 As shown, a sealing element 73 is provided between the first flange 71 and the first flange cover 72. The sealing element 73 has sealing properties, enhancing the sealing effect and preventing leakage of reaction gases or liquids within the wastewater reaction zone 2, thus preventing any impact on the reaction effect. The sealing element 73 can be a sealing ring or a sealing gasket. For example, if the sealing element 73 is a sealing ring, it is positioned at the connection between the first flange 71 and the first flange cover 72 to ensure a seamless connection, thereby improving the sealing performance. Alternatively, if the sealing element 73 is a sealing gasket, it is installed between the first flange 71 and the first flange cover 72 to ensure a sealing effect. The first flange cover 72 is a blind flange or a multi-claw protective cover. In one example, the first flange cover 72 is a blind flange, such as... Figure 9 As shown, both the blind flange and the first flange 71 are made of stainless steel and are bolted together. The blind flange is used to isolate the external environment from the wastewater reaction zone 2 to ensure the normal reaction of granular sludge within the wastewater reaction zone 2, thereby ensuring sealing and operational safety. In another example, such as Figure 1As shown, the first flange cover 72 is a multi-grip protective cover with a cylindrical structure in the middle and multiple protrusions on the sides. The multi-grip protective cover is sealing, corrosion resistant, and made of plastic. It is lightweight, easy to install, and can withstand the scouring of the medium and the friction of particles, reducing flange wear. In the assembled state, the cylindrical structure of the multi-grip protective cover is adapted to the middle of the first flange 71, and the protrusions match the through holes on the first flange 71. The connecting piece 9 (e.g., bolt) is passed through the protrusions and through holes to connect the first flange cover 72 to the first flange 71, thereby ensuring the sealing of the sewage reaction zone 2.

[0049] In some embodiments, such as Figure 1 and Figure 2 , Figures 9 to 11 As shown, a base 8 is installed at the bottom of the reactor body 1. The base 8 includes a second flange 81 and a second flange cover 82. The second flange cover 82 is detachably connected to the bottom of the first body 11. The detachable connection method can be adapted as needed to ensure that operators can periodically disassemble for internal cleaning, component replacement, and other operations. The second flange cover 82 is located at the bottom of the second flange 81 and is connected by a connector 9. It should be noted that the second flange 81 is a blind flange. Figure 10 As shown, during use, because the wastewater reaction zone 2 contains liquid, the second flange 81 of the reactor cylinder 1 is connected to the blind flange and can withstand water pressure, ensuring a safe and stable connection. Simultaneously, a sealing element 73 is also provided between the second flange cover 82 and the second flange 81. The type of sealing element 73 is consistent with that described above, ensuring sealing performance and reaction quality. In one example, the second flange 81 can also be a multi-layer protective cover, such as... Figure 11 As shown, when the operator completes the reaction process, the top cover 7 and the base 8 can be removed from the reactor body 1 to facilitate the cleaning of each component. At the same time, removing each component makes it easier to store and process it later, thereby saving space and making it convenient to carry, avoiding taking up unnecessary space.

[0050] The diameter of the base 8 is smaller than that of the top cover 7, so as to match the structure of the reactor cylinder 1 and ensure the overall stability and reliability of the entire algae reactor 100.

[0051] In some embodiments, such as Figure 8As shown, the inner wall of the first cylinder 11 has a nano-coating 110. The nano-coating 110 is a superhydrophobic nano-coating. The superhydrophobic nano-coating is uniformly coated on the inner wall of the reactor cylinder 1 through spraying or coating processes to ensure the thickness and uniformity of the coating, thereby forming a durable and effective coating. The superhydrophobic nano-coating has extremely low surface energy, making it difficult for algae and granular sludge to adhere to the inner wall of the first cylinder 11. Even if a small amount of algae and granular sludge comes into contact with the inner wall of the first cylinder 11, it will easily detach under the action of water flow due to the superhydrophobicity of the surface. This effectively prevents the adhesion and accumulation of algae and granular sludge on the reactor wall, maintains the light transmittance of the reactor cylinder 1, reduces manual maintenance, extends the service life of the equipment, and improves the stability of algae and granular sludge cultivation.

[0052] This application provides a bacterial and algal reaction treatment system, such as Figure 3 and Figure 12 As shown, the reactor includes a drainage tank 200, an inlet tank 300, an air pump 400, a control device 500, and the aforementioned algae and bacteria reactor 100. The drainage tank 200 is connected to the algae and bacteria reactor 100 via a diaphragm pump 600. Wastewater from the reaction zone 2 is discharged into the drainage tank 200 via the diaphragm pump 600 for subsequent centralized treatment and operation. The inlet tank 300 is connected to the algae and bacteria reactor 100 via a peristaltic pump 700. The water to be reacted in the inlet tank 300 is transported to the wastewater reaction zone 2 via the peristaltic pump 700 for subsequent reaction treatment. One end of the light plate 4 on the reactor body 1 is electrically connected to a light source controller 800, which controls the light intensity and constant temperature of the light source on the light plate 4. During the illumination period, in one example, a flow meter 900 is also installed on the reactor body 1. The flow meter 900 is connected to the reactor body 1 through an aeration device 1000. In the assembled state, the aeration bulb of the aeration device 1000 extends to the bottom of the first cylinder 11. The flow meter 900 can adjust the aeration volume in the aeration device 1000, which is convenient for operators to observe in a timely manner. The flow meter 900 is also connected to an air pump 400. The air pump 400 is used to extract or compress the aeration in the sewage reaction zone 2, thereby ensuring normal internal operation. The control device 500 is electrically connected to the diaphragm pump 600, the peristaltic pump 700, the light source controller 800, and the air pump 400, and is used for adjustment and data collection.

[0053] The working principle of the algae and bacteria reactor and treatment system disclosed in this application is as follows:

[0054] like Figures 1 to 12As shown, firstly, the operator connects the drain tank 200 to the connecting pipe 6 in the middle of the reactor body 1 via the diaphragm pump 600, connects the inlet tank 300 to the connecting pipe 6 at the bottom of the reactor body 1 via the peristaltic pump 700, and installs the base 8 and top cover 7 onto the reactor body 1. The aeration device 1000 is placed in the wastewater reaction zone 2 and connected in sequence to the flow meter 900 and the air pump 400. The control device 500 is electrically connected to the diaphragm pump 600, the peristaltic pump 700, the light source controller 800, and the air pump 400 to complete the installation steps.

[0055] The experimental apparatus for the algae and bacteria reactor in this application adopts a photo-sequential batch reactor. The photo-sequential batch reactor has an inner diameter of 5 cm and a height of 65 cm. The working volume of the first cylinder 11 in each photo-sequential batch reactor is 1.2 L, and the volume exchange rate is 50%. An LED light strip with an illumination intensity of 4500 lx is wound between the first cylinder 11 and the second cylinder 12. The photo-sequential batch reactor receives light under a 12h light / 12h dark cycle, with an HRT of 8h. The connecting pipe 6 is the water inlet. Wastewater is sent to the photo-sequential batch reactor from the connecting pipe 6 through a peristaltic pump 700. After periodic interaction with the granular sludge, the effluent is discharged through the connecting pipe 6 and the diaphragm pump 600.

[0056] The algal solution, aerobic granular sludge, and wastewater required for the reaction are collected into the wastewater reaction zone 2 of the first cylinder 11. The spiral-shaped multiple light plates 4 between the first cylinder 11 and the second cylinder 12 are turned on by the light source controller 800 to ensure that the light is evenly distributed in the wastewater reaction zone 2 and the reaction operation is carried out. During the reaction, the aeration rate of the aeration device 1000 is adjusted at any time by the flow meter 900 to ensure that the gas in the wastewater reaction zone 2 reaches the required state. At the same time, the relevant data and the status of each component during the process are sent to the control device 500 in real time. The control device 500 makes adaptive adjustments and controls based on the relevant data.

[0057] Finally, after the reaction is complete, the operator will discharge the wastewater to the drainage tank 200 through the diaphragm pump for centralized treatment to avoid environmental pollution. If the experiment is to continue or the wastewater reaction zone 2 is to be cleaned, the water in the inlet tank 300 can be transported to the wastewater reaction zone 2 through the peristaltic pump 700 for subsequent operations. After the operation is completed, each component can be disassembled for easy storage.

[0058] It should be noted that the applicant has experimentally verified the effectiveness of the constructed photosequential batch algae reactor. Reactor P1 was filled with immature Chlorella algal solution and mature aerobic granular sludge. The reactor's COD, TN, and TP removal performance, as well as sludge characteristics (sludge morphology, sludge concentration, settling performance, EPS content), and chlorophyll content, were monitored. Humic acid was added to the influent in the later stages of the experiment, and the reactor's removal efficiency for humic acid was observed. Some results are shown below. Figures 13 to 15As shown, the influent to this reactor is artificially synthesized simulated wastewater, whose main components are sodium propionate, potassium acetate, glucose, potassium dihydrogen phosphate, ammonium chloride, sodium bicarbonate, and trace element solution, etc. The COD and NH4+ levels in the reactor influent are... + The specific concentrations of -N, TN, and TP are shown in Table 1 below. The reactor runs for 6 hours in a single cycle, including 5 minutes of settling time, 30 minutes of influent time, 240 minutes of aeration time, 70 minutes of anaerobic time, 3 minutes of effluent time, and 12 minutes of idle time.

[0059] Table 1: Concentration of main components and load of simulated wastewater in reactor

[0060]

[0061] Experimental index 1: Morphology and particle size distribution of granular sludge

[0062] On day 7 of the experiment, the sludge began to turn yellowish-green, and algae began to attach and grow. The average particle size of the bacterial and algal granular sludge in reactor P1 was 1.87 mm, with particles ranging from 1.20 to 2.40 mm accounting for the largest proportion (67.62%). On day 20 of the experiment, the average particle size of the bacterial and algal granular sludge in reactor P1 was 1.80 mm. On day 30 of the experiment, the average particle size of the bacterial and algal granular sludge in reactor P1 was 1.77 mm, with particles ranging from 1.20 to 1.80 mm accounting for the largest proportion (54.54%). Figure 13 The figure shows the particle size distribution of the bacterial and algal granular sludge in the reactor on day 50. The average particle size of the bacterial and algal granular sludge in reactor P1 is 1.80 mm, with particles of 1.60-2.00 mm accounting for the largest proportion, at 29.93%. Even with the addition of humic acid to the influent, the particle size of reactor P1 remains stable.

[0063] Experimental index 2: Sludge concentration

[0064] Figure 14 This represents the change in sludge concentration over a 50-day operating cycle. Experimental data shows that as the algal granular sludge gradually forms, the biomass within the reactor increases significantly. By day 15, the sludge concentration in reactor P1 had increased from the initial 5.09 g / L to 6.56 g / L. Combined with... Figure 15 The sludge SVI variation curves shown indicate that even if the granular sludge partially disintegrates or the system cannot provide the necessary nutrients for microbial growth, the physical properties of the granular sludge in reactor P1 do not change significantly and recover quickly. The MLVSS / MLSS ratio is also relatively stable. Even with the addition of humic acid to the influent, the sludge concentration in reactor P1 remains stable under certain fluctuations.

[0065] Experimental index 3: Sludge settling performance

[0066] like Figure 15 As shown, with the operation of the reactor, bacterial and algal particles gradually form, the settling performance of the granular sludge in reactor P1 continuously improves, and the sludge volume index continuously decreases. Furthermore, during the 0-20 day experimental operation, the SVI of the sludge in reactor P1... 30 / SVI5 has reached around 0.9.

[0067] Experimental index four:

[0068] This study monitored the integrity coefficient and wet density of granular sludge. On day 0, the integrity coefficient and wet density of aerobic granular sludge in P1 were 84.51% and 1.036 g / cm³, respectively. 3 On day 50, the integrity coefficient and wet density of ABGS were 94.12% and 1.13 g / cm³, respectively. 3 .

[0069] Experimental Index 5 - System Daily Operation Performance:

[0070] Removal of conventional pollutants: Before the humic acid influent, the average removal rate of ammonia nitrogen and COD in reactor P1 was 90%, and the removal rate of total nitrogen was 86%.

[0071] Removal of recalcitrant organic matter: It has a certain ability to remove humic acid, with a removal rate of 30% in reactor P1.

[0072] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An algal-bacterial reactor, characterized in that, include: The reactor shell is a transparent glass structure, and the reactor shell is used to define the wastewater reaction zone; A guide plate, having a conical spiral structure, is installed in the wastewater reaction zone. The guide plate is fixedly connected to the reactor cylinder, and the surface of the guide plate has multiple through holes. Multiple light plates are disposed on the side wall of the reactor cylinder to provide light energy for the reaction. The multiple light plates are spirally distributed along the axial direction of the reactor cylinder to form a light strip assembly.

2. The algae and bacteria reactor as described in claim 1, characterized in that, The helix angle of the guide plate is 30°-45°.

3. The algae and bacteria reactor as described in claim 1, characterized in that, The reactor cylinder is frustum-shaped, with its opening inner diameter being larger than its bottom inner diameter.

4. The algae and bacteria reactor as described in claim 3, characterized in that, The inner diameter of the reactor cylinder opening is 1.5-2 times the inner diameter of the bottom.

5. The algae and bacteria reactor according to any one of claims 1-4, characterized in that, The reactor cylinder has a hydrophobic nano-coating on its inner wall facing the reaction zone.

6. The algae and bacteria reactor as described in claim 1, characterized in that, The reactor body includes a first cylinder and a second cylinder arranged coaxially, with the first cylinder located inside the second cylinder, and the wastewater reaction zone inside the first cylinder.

7. The algae and bacteria reactor as described in claim 6, characterized in that, The light plate is installed between the first cylinder and the second cylinder.

8. The algae and bacteria reactor as described in claim 1, characterized in that, Along the axial direction of the reactor body, a plurality of connecting pipes are spaced apart on the reactor body, and the wastewater reaction zone is connected to the outside through the connecting pipes.

9. The algae and bacteria reactor as described in claim 6, characterized in that, The top of the reactor cylinder is provided with a top cover, which includes a first flange and a first flange cover. The first flange is detachably connected to the first cylinder and is connected to the first flange cover through a connector.

10. The algae and bacteria reactor as described in claim 6, characterized in that, The bottom of the reactor cylinder is equipped with a base, which includes a second flange and a second flange cover. The second flange cover is detachably connected to the first cylinder.

11. A bacterial-algae reaction treatment system, characterized in that, It includes a drain tank, an inlet tank, an air pump, control equipment, and an algae and bacteria reactor as described in any one of claims 1-10, wherein the drain tank is connected to the algae and bacteria reactor via a diaphragm pump, and the inlet tank is connected to the algae and bacteria reactor via a peristaltic pump.

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