Iron-carbon biological rotating disc for enhancing sewage treatment

Abstract

The utility model provides a kind of iron-carbon biological rotating disc of reinforced sewage treatment, including sewage treatment tank, the water pipe for water inlet and outlet is installed at both ends of the sewage treatment tank, the inside rotation connection fixed shaft of the sewage treatment tank;Both ends of the sewage treatment tank are installed bearing block for providing support to the fixed shaft, the sidewall of the sewage treatment tank is installed low-speed motor, and the output shaft of the low-speed motor is connected between the fixed shaft by belt;The sidewall of the fixed shaft is fixedly connected with multiple plastic disc pieces and iron disc piece, the plastic disc piece and the iron disc piece are spaced apart on the surface of the fixed shaft, and the sidewall of the plastic disc piece with surface in meshed form is installed multiple bosses;The iron disc piece is pressed from multiple carbon steel sheet with surface in wavy form.The iron-carbon biological rotating disc of reinforced sewage treatment provided by the utility model has the advantages of simple structure, low cost, rapid biofilm formation, high pollutant removal efficiency and simultaneous phosphorus removal.

Description

Technical Field

[0001] This utility model relates to the field of biological rotating disc technology, and in particular to an iron-carbon biological rotating disc for enhanced wastewater treatment. Background Technology

[0002] Biological rotating discs are a biofilm-based wastewater treatment technology with advantages such as convenient installation, simple maintenance, no risk of sludge bulking, and low operating energy consumption. They have been widely used in the treatment of small and medium-sized domestic sewage and some industrial wastewater. The core component is usually a circular disc made of ordinary polyethylene (PE), polyvinyl chloride (PVC), or polystyrene (PS). The immersion rate of the disc is usually 40% to 50%. By rotating at low speed, the biofilm alternately replaces sewage and air, thereby achieving the degradation of pollutants.

[0003] Conventional plastic discs have the problem of strong hydrophobicity and difficulty in the initial attachment of microorganisms, resulting in a long start-up period for biofilm formation on biological rotating discs. In addition, biological rotating discs usually operate in a fully aerobic mode, and plastic discs lack electron donors and acceptors, resulting in low efficiency for recalcitrant organic matter and total nitrogen. The removal of total phosphorus also usually relies on the addition of chemical agents.

[0004] Therefore, it is necessary to provide a new iron-carbon biological rotating disc for enhanced wastewater treatment to solve the above problems. Utility Model Content

[0005] The technical problem solved by this utility model is to provide an iron-carbon biological rotating disc for enhanced wastewater treatment that is simple in structure, low in cost, allows for rapid biofilm formation, has high pollutant removal efficiency, and can simultaneously remove phosphorus.

[0006] To solve the above-mentioned technical problems, the iron-carbon biological rotating disc for enhanced sewage treatment provided by this utility model includes: a sewage treatment tank, with water pipes for inlet and outlet installed at both ends of the sewage treatment tank, and a fixed shaft rotatably connected inside the sewage treatment tank; bearing seats for supporting the fixed shaft are installed at both ends of the sewage treatment tank; a low-speed motor is installed on the side wall of the sewage treatment tank, and the output shaft of the low-speed motor is connected to the fixed shaft via a belt; multiple plastic discs and iron discs are fixedly connected to the side wall of the fixed shaft, the plastic discs and iron discs are spaced apart on the surface of the fixed shaft, and multiple protrusions are installed on the side wall of the plastic discs with a mesh-like surface; the iron discs are formed by pressing multiple carbon steel sheets with a wavy surface.

[0007] Preferably, the plastic disc and the iron disc have a diameter of 1.2 meters, the plastic disc has a thickness of 3 millimeters, and the iron disc has a thickness of 2.5 to 3 centimeters.

[0008] Preferably, the bottom surface of the sewage treatment tank is inclined, and a sewage pipe is installed at the lowest point inside the sewage treatment tank.

[0009] Preferably, a guide rail is installed inside the top of the sewage treatment tank, and the side wall of the guide rail is provided with a fixing block with an arc-shaped side wall. The fixing block is fixedly connected to the connecting rod. The two ends of the fixing plate are respectively fixedly connected to the fixing block and the sliding plate, and the sliding plate with an arc-shaped side wall is slidably connected to the fixing shaft.

[0010] Preferably, the two ends of the fixing plate are respectively fixedly connected to a first scraper and a second scraper with triangular sidewalls. The first scraper is slidably connected to the sidewall of the iron disc. The sidewall of the second scraper is equipped with a plurality of elastic teeth, and the teeth are slidably connected to the surface of the plastic disc and the protrusion.

[0011] Preferably, a fixing plate is provided between each of the adjacent plastic discs and the iron discs, and the fixing plate has multiple spray holes on its upward-facing surface.

[0012] Preferably, a flexible hose is installed at one end of the connecting rod, and an installation block is installed at the other end of the connecting rod; an adjusting cylinder is fixedly connected to the side wall of the sewage treatment tank, and the installation block is slidably connected inside the adjusting cylinder; the adjusting cylinder is threadedly connected to the screw, and one end of the screw is rotatably connected to and engaged with the interior of the installation block.

[0013] Compared with related technologies, the iron-carbon biological rotating disc for enhanced wastewater treatment provided by this utility model has the following beneficial effects: This invention provides an iron-carbon biological rotating disc for enhanced wastewater treatment. During the wastewater treatment process, the carbon steel sheet undergoes micro-electrolysis in the water to generate Fe. 2+ Fe 3+ Substances such as ·OH exert stress on cells, stimulating microorganisms to continuously secrete extracellular polymers (EPS). Filamentous bacteria, as an important framework for biofilms, can bind to other microorganisms such as cocci and bacilli, whose surfaces are typically negatively charged. Furthermore, the EPS secreted by microorganisms possesses adhesiveness and aggregation properties. Together, these properties adsorb and adhere to positively charged iron compounds in the solution, anchoring microorganisms to the discs with these iron compounds as the core. The microorganisms and iron compound micelles attached to the discs continuously promote the aggregation of microbial cells by reducing surface charge and energy, thus achieving rapid biofilm formation on the rotating biological disc. This effectively increases biomass. Moreover, the carbon steel sheet immersed in water undergoes iron-carbon micro-electrolysis, generating highly oxidizing free radicals, which is beneficial for the removal of recalcitrant organic pollutants, improving the biodegradability of the influent, increasing the available carbon source for microorganisms, and aiding in heterotrophic denitrification. During biofilm formation, iron-carbon micro-electrolysis continuously generates Fe... 2+ Substances such as hydrogen and sulfur dioxide (H2) provide conditions for the enrichment of autotrophic denitrifying microorganisms. These microorganisms utilize inorganic carbon sources for denitrification, further improving nitrogen removal efficiency. The Fe produced by micro-electrolysis of novel iron-carbon materials in wastewater...2+ Fe 3+ Byproducts and PO4 3- The combination of Fe3(PO4)2 and Fe(H2PO4)·2H2O precipitates on the biofilm achieves efficient phosphorus removal. By adding carbon steel sheets inside the wastewater treatment tank, the effect of rapid disc biofilm formation and simultaneous high phosphorus removal efficiency is achieved, while the structure is simple and production costs are reduced. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the iron-carbon biological rotating disc for enhanced wastewater treatment provided by this utility model; Figure 2 for Figure 1 The diagram shows an enlarged view of the structure at point A. Figure 3 for Figure 1 The side view of the plastic disc structure shown; Figure 4 for Figure 1 The side view of the iron disc structure shown; Figure 5 for Figure 3 The diagram shown is an exploded view of the guide rail and fixing plate structure. Figure 6 for Figure 5 The diagram shows an enlarged view of the structure at point B.

[0015] Numbered in the diagram: 1. Sewage treatment tank, 2. Sewage pipe, 3. Water pipe, 4. Plastic disc, 41. Protrusion, 5. Iron disc, 51. Carbon steel sheet, 6. Bearing seat, 7. Fixed shaft, 8. Belt, 9. Low-speed motor, 10. Guide rail, 11. Fixed plate, 12. Slide plate, 13. Slide groove, 14. Fixed block, 15. Connecting rod, 16. Hose, 17. Mounting block, 18. Adjusting cylinder, 19. Screw, 20. Spray hole, 21. First scraper, 22. Second scraper, 23. Clamping tooth. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please see Figures 1 to 6 , Figure 1 A schematic diagram of a preferred embodiment of the iron-carbon biological rotating disc for enhanced wastewater treatment provided by this utility model; Figure 2 for Figure 1 The diagram shows an enlarged view of the structure at point A. Figure 3 for Figure 1 The side view of the plastic disc structure shown; Figure 4 for Figure 1 The side view of the iron disc structure shown; Figure 5for Figure 3 The diagram shown is an exploded view of the guide rail and fixing plate structure. Figure 6 for Figure 5 The diagram shows an enlarged view of the structure at point B. An iron-carbon biological rotating disc for enhanced wastewater treatment includes a wastewater treatment tank 1. Water pipes 3 for inlet and outlet drainage are installed at both ends of the wastewater treatment tank 1. A fixed shaft 7 is rotatably connected inside the wastewater treatment tank 1. Bearing seats 6 are installed at both ends of the wastewater treatment tank 1 to provide support for the fixed shaft 7. A low-speed motor 9 is installed on the side wall of the wastewater treatment tank 1. The output shaft of the low-speed motor 9 is connected to the fixed shaft 7 via a belt 8. To turn on the low-speed motor 9, the low-speed motor 9 drives the belt 8 and the fixed shaft 7 to rotate. The fixed shaft 7 drives the plastic disc 4 and the iron disc 5 to rotate in the wastewater, facilitating the biofilm treatment of harmful substances in the wastewater.

[0018] Multiple plastic discs 4 and iron discs 5 are fixedly connected to the side wall of the fixed shaft 7. The plastic discs 4 and iron discs 5 are arranged at intervals on the surface of the fixed shaft 7. Multiple protrusions 41 are installed on the side wall of the plastic discs 4, which have a mesh-like surface. The protrusions 41 increase the surface area and roughness of the plastic discs 4, which facilitates biofilm formation. The mesh-like surface of the plastic discs 4 facilitates the entry of sewage. The iron discs 5 are made of multiple carbon steel sheets 51 with wavy surfaces. When the iron discs 5 rotate, the carbon steel sheets 51 undergo micro-electrolysis in the sewage, achieving rapid biofilm formation and high efficiency in the simultaneous removal of phosphorus pollutants.

[0019] The plastic disc 4 and the iron disc 5 have a diameter of 1.2 meters. The plastic disc 4 has a thickness of 3 millimeters. The iron disc 5 has a thickness of 2.5 to 3 centimeters. The carbon steel sheet 51 has a thickness of 1 to 2 millimeters. After the carbon steel sheet 51 is pressed into a cylindrical shape, there are gaps between the materials to facilitate the entry of sewage into the interior of the iron disc 5.

[0020] The bottom of the sewage treatment tank 1 is inclined, and a drain pipe 2 is installed at the lowest point inside the sewage treatment tank 1 to facilitate the opening of the drain pipe 2 to discharge the sediment inside the sewage treatment tank 1.

[0021] The top of the sewage treatment tank 1 is equipped with a guide rail 10. The side wall of the guide rail 10 is provided with a fixing block 14 with an arc-shaped side wall. The fixing block 14 is fixedly connected to the connecting rod 15. The two ends of the fixing plate 11 are respectively fixedly connected to the fixing block 14 and the sliding plate 12. The sliding plate 12 with an arc-shaped side wall is slidably connected to the fixing shaft 7. In order to facilitate the sliding of the fixing block 14 inside the guide rail 10, the fixing block 14 drives the fixing plate 11 to move, changing the distance between the fixing plate 11 and the disc. The sliding plate 12 at one end of the fixing plate 11 always abuts against the fixing shaft 7. The fixing shaft 7 provides support for the fixing plate 11 through the sliding plate 12, increasing the stability of the movement of the fixing plate 11.

[0022] The two ends of the fixing plate 11 are respectively fixedly connected to a first scraper 21 and a second scraper 22 with triangular sidewalls. The first scraper 21 is slidably connected to the sidewall of the iron disc 5. The sidewall of the second scraper 22 is equipped with a plurality of elastic teeth 23, and the teeth 23 are slidably connected to the surface of the plastic disc 4 and the protrusion 41. When the biofilm layer on the surfaces of the plastic disc 4 and the iron disc 5 is too thick, causing blockage on the disc surfaces, it affects the normal flow of water and reduces the hydraulic performance of the treatment system. At this time, the fixed plate 11 is slidable, and the fixed plate 11 drives the first scraper 21 to move towards the iron disc 5. The first scraper 21, with a triangular sidewall cross-section, contacts the biofilm on the rotating surface of the iron disc 5 and scrapes off the excessively thick biofilm. When the fixed plate 11 drives the second scraper 22 to move towards the plastic disc 4, the second scraper 22 scrapes off the desired biofilm on the rotating surface of the plastic disc 4. Furthermore, one end of the second scraper 22 is equipped with an elastic retaining tooth 23. When the retaining tooth 23 contacts the protrusion 41, the rotating protrusion 41 squeezes the retaining tooth 23, and the retaining tooth 23 deforms, making it easier for the protrusion 41 to slide past one end of the second scraper 22, thereby preventing the second scraper 22 from affecting the rotation of the plastic disc 4 during the process of cleaning the biofilm.

[0023] A fixing plate 11 is provided between each adjacent plastic disc 4 and iron disc 5 to facilitate cleaning of the plastic disc 4 and iron disc 5 by the fixing plate 11. The fixing plate 11 has multiple spray holes 20 facing upwards to facilitate air to be sprayed upwards through the spray holes 20 into the space between the plastic disc 4 and iron disc 5, thereby increasing the oxygen concentration on the surface of the biofilm and improving the efficiency of the biofilm in treating wastewater.

[0024] A flexible hose 16 is installed at one end of the connecting rod 15 to facilitate connection between the hose 16 and the blower, allowing air to enter the interior of the connecting rod 15 through the hose 16. The air then passes through the fixing block 14 and the fixing plate 11 before being ejected from the nozzle 20. An mounting block 17 is installed at the other end of the connecting rod 15. An adjusting cylinder 18 is fixedly connected to the side wall of the sewage treatment tank 1, and the mounting block 17 is slidably connected inside the adjusting cylinder 18. The adjusting cylinder 18 is threadedly connected to a screw 19, one end of which is rotatably connected to and engaged with the interior of the mounting block 17. When the position of the fixing plate 11 needs to be changed, the screw 19 is rotated, causing the mounting block 17 to slide inside the adjusting cylinder 18, while the screw 19 rotates inside the mounting block 17, preventing the screw 19 from rotating the mounting block 17. The movement of the mounting block 17 causes the connecting rod 15 and the fixing block 14 to slide inside the slide groove 13, changing the position of the fixing plate 11.

[0025] The working principle of the iron-carbon biological rotating disc for enhanced sewage treatment provided by this utility model is as follows: Sewage to be treated is input into the sewage treatment tank 1 through the water pipe 3 at one end of the sewage treatment tank 1. The low-speed motor 9 is connected to an external power source, and the hose 16 is connected to a blower, so that air enters the interior of the connecting rod 15 through the hose 16. The air passes through the fixing block 14 and the fixing plate 11 in sequence and is then ejected from the interior of the spray hole 20. The operation of the low-speed motor 9 drives the belt 8 and the fixing shaft 7 to rotate. The fixing shaft 7 drives the plastic disc 4 and the iron disc 5 to rotate in the sewage, so that the biofilm on the surface of the discs treats the sewage. The treated sewage is discharged through the water pipe 3 at the other end of the sewage treatment tank 1. During the rotation of the discs, air from inside the blower enters the connecting rod 15 through the hose 16. The air then passes sequentially through the fixing block 14 and the fixing plate 11 before being ejected from the nozzle 20 into the space between the plastic disc 4 and the iron disc 5, increasing the oxygen concentration on the biofilm surface and thus improving the efficiency of the biofilm in treating wastewater. During the wastewater treatment process, the carbon steel sheet 51 undergoes micro-electrolysis in the water to generate Fe. 2+ Fe 3+Substances such as ·OH exert stress on cells, stimulating microorganisms to continuously secrete extracellular polymers (EPS). Filamentous bacteria, as an important framework for biofilms, can bind to other microorganisms such as cocci and bacilli, whose surfaces are typically negatively charged. Furthermore, the EPS secreted by microorganisms possesses adhesiveness and aggregation properties. Together, these properties adsorb and adhere to positively charged iron compounds in the solution, anchoring microorganisms to the discs with these iron compounds as the core. The microorganisms and iron compound micelles attached to the discs continuously promote the aggregation of microbial cells by reducing surface charge and energy, thus achieving rapid biofilm formation on the biological rotating disc. This effectively increases biomass. Moreover, the carbon steel sheet 51, when immersed in water for iron-carbon micro-electrolysis, generates highly oxidizing free radicals, which are beneficial for the removal of recalcitrant organic pollutants, improve the biodegradability of the influent, increase the available carbon source for microorganisms, and aid in heterotrophic denitrification. During biofilm formation, iron-carbon micro-electrolysis continuously generates Fe... 2+ Substances such as hydrogen and sulfur dioxide (H2) provide conditions for the enrichment of autotrophic denitrifying microorganisms. These microorganisms utilize inorganic carbon sources for denitrification, further improving nitrogen removal efficiency. The Fe produced by micro-electrolysis of novel iron-carbon materials in wastewater... 2+ Fe 3+ Byproducts and PO4 3- The formation of Fe3(PO4)2 and Fe(H2PO4)·2H2O precipitates on the biofilm achieves efficient phosphorus removal. When the biofilm layer on the plastic disc 4 and the iron disc 5 becomes too thick, causing blockage, it affects the normal flow of water and reduces the hydraulic performance of the treatment system. At this time, rotating the screw 19 causes the mounting block 17 to slide inside the regulating cylinder 18, and the screw 19 rotates inside the mounting block 17 to prevent it from rotating. The movement of the mounting block 17 causes the connecting rod 15 and the fixing block 14 to slide inside the sliding groove 13, changing the position of the fixing plate 11. The fixing plate 11 then moves the first scraper 21 towards the iron disc 5, with a triangular sidewall cross-section. The first scraper 21 contacts the biofilm on the surface of the rotating iron disc 5, scraping away the excessively thick biofilm; and when the fixing plate 11 drives the second scraper 22 to move towards the plastic disc 4, the second scraper 22 scrapes away the desired biofilm on the surface of the rotating plastic disc 4; and one end of the second scraper 22 is equipped with an elastic retaining tooth 23. When the retaining tooth 23 contacts the protrusion 41, the rotating protrusion 41 squeezes the retaining tooth 23, and the retaining tooth 23 deforms to facilitate the protrusion 41 to slide past one end of the second scraper 22, thereby avoiding the second scraper 22 from affecting the rotation of the plastic disc 4 during the process of cleaning the biofilm.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An iron-carbon biological rotating disc for enhanced wastewater treatment, characterized in that, include: Wastewater treatment tank (1), with water pipes (3) for inlet and outlet water installed at both ends of the wastewater treatment tank (1), and a fixed shaft (7) rotatably connected inside the wastewater treatment tank (1); bearing seats (6) for providing support to the fixed shaft (7) are installed at both ends of the wastewater treatment tank (1), and a low-speed motor (9) is installed on the side wall of the wastewater treatment tank (1), with the output shaft of the low-speed motor (9) connected to the fixed shaft (7) by a belt (8). The side wall of the fixed shaft (7) is fixedly connected to multiple plastic discs (4) and iron discs (5). The plastic discs (4) and the iron discs (5) are spaced apart on the surface of the fixed shaft (7). Multiple protrusions (41) are installed on the side wall of the plastic discs (4) with a mesh-like surface. The iron discs (5) are made of multiple carbon steel sheets (51) with a wavy surface.

2. The iron-carbon biological rotating disc for enhanced wastewater treatment according to claim 1, characterized in that, The plastic disc (4) and the iron disc (5) have a diameter of 1.2 meters, the plastic disc (4) has a thickness of 3 millimeters, the iron disc (5) has a thickness of 2.5 to 3 centimeters, and the carbon steel sheet (51) has a thickness of 1 to 2 millimeters.

3. The iron-carbon biological rotating disc for enhanced wastewater treatment according to claim 1, characterized in that, The bottom surface of the sewage treatment tank (1) is inclined, and a sewage pipe (2) is installed at the lowest point inside the sewage treatment tank (1).

4. The iron-carbon biological rotating disc for enhanced wastewater treatment according to claim 1, characterized in that, The top of the sewage treatment tank (1) is equipped with a guide rail (10), and the side wall of the guide rail (10) is provided with a fixed block (14) with an arc-shaped side wall. The fixed block (14) is fixedly connected to the connecting rod (15). The two ends of the fixed plate (11) are respectively fixedly connected to the fixed block (14) and the sliding plate (12), and the sliding plate (12) with an arc-shaped side wall is slidably connected to the fixed shaft (7).

5. The iron-carbon biological rotating disc for enhanced wastewater treatment according to claim 4, characterized in that, The two ends of the fixing plate (11) are respectively fixedly connected to a first scraper (21) and a second scraper (22) with triangular sidewalls. The first scraper (21) is slidably connected to the sidewall of the iron disc (5). The sidewall of the second scraper (22) is equipped with a plurality of elastic teeth (23), and the teeth (23) are slidably connected to the surface of the plastic disc (4) and the protrusion (41).

6. The iron-carbon biological rotating disc for enhanced wastewater treatment according to claim 5, characterized in that, A fixing plate (11) is provided between each adjacent plastic disc (4) and iron disc (5), and the surface of the fixing plate (11) is provided with multiple spray holes (20).

7. The iron-carbon biological rotating disc for enhanced wastewater treatment according to claim 4, characterized in that, A hose (16) is installed at one end of the connecting rod (15), and an mounting block (17) is installed at the other end of the connecting rod (15); an adjusting cylinder (18) is fixedly connected to the side wall of the sewage treatment tank (1), and the mounting block (17) is slidably connected inside the adjusting cylinder (18); the adjusting cylinder (18) is threadedly connected to the screw (19), and one end of the screw (19) is rotatably connected to and engaged inside the mounting block (17).

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