Continuous-flow aerobic granular sludge self-recycling reactor and method thereof

Abstract

The present application relates to sewage treatment technical field, especially to a kind of continuous flow aerobic granular sludge self reflux reactor and method thereof.It includes support part and barrier part, support part is used to support barrier part, prevent water flow dispersion, barrier part is located inside support part, for the removal of pollutants;Barrier part includes: partition, is fixed inside support part, for separating support part into first cavity and second cavity;Water flow through hole, located inside one end of partition, for allowing water inside first cavity to pass through water flow through hole, into second cavity inside;Backflow hole, located inside the other end of partition.The present application provides a kind of continuous flow aerobic granular sludge self reflux reactor and method thereof, through support part and barrier part, sedimentation zone, aerobic zone and anoxic zone can be combined, and continuous water in and out can be realized by self reflux, thereby saving land occupation, operation mode is flexible, simple.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a continuous flow aerobic granular sludge self-recirculation reactor and its method. Background Technology

[0002] Currently, most wastewater treatment plants use continuous flow wastewater treatment processes, but there is insufficient research and development of aerobic granular sludge technology based on continuous flow wastewater treatment processes.

[0003] Existing continuous flow aerobic granular sludge reactors have the following technical limitations:

[0004] (1) In the existing technology, most of them are multiple reactors connected in series or the aeration zone and sedimentation zone are separated, which takes up a large area and costs a lot.

[0005] (2) In the existing technology, there is insufficient research on how to construct an aerobic granular sludge reactor based on the existing continuous flow sewage treatment process structure.

[0006] (3) In the existing technology, there is insufficient research on the cultivation of stable aerobic granular sludge in reactors. Most aerobic granular sludge cultivated in reactors is prone to disintegration and cannot meet the requirements of stable, simultaneous and efficient nitrogen and phosphorus removal.

[0007] Therefore, a continuous flow aerobic granular sludge self-recirculation reactor and its method are designed to provide another technical solution to the above-mentioned technical problems. Summary of the Invention

[0008] Therefore, it is necessary to provide a continuous flow aerobic granular sludge self-recirculation reactor and method to address the aforementioned technical problems.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] A continuous flow aerobic granular sludge self-recirculation reactor includes a support section and a barrier section. The support section is used to support the barrier section to prevent water flow dispersion. The barrier section is located inside the support section and is used to remove pollutants.

[0011] The barrier includes:

[0012] A partition plate, fixed inside the support portion, is used to divide the support portion into a first cavity and a second cavity;

[0013] The water flow hole is located inside one end of the partition plate and is used to allow water from the first cavity to enter the second cavity through the water flow hole.

[0014] The return hole is located inside the other end of the partition plate and at the top of the water flow hole. It is used to allow water inside the second chamber to flow back into the first chamber through the return hole.

[0015] The first turbulence component is located inside the first cavity and is used to turbulent the water entering through the water inlet pipe;

[0016] The second turbulence assembly, located inside the second cavity, is used to turbulent the water entering the second cavity.

[0017] In a preferred embodiment of the continuous flow aerobic granular sludge self-recirculation reactor provided by the present invention, the support includes a bottom plate, a first baffle plate and a second baffle plate. The second baffle plate is fixed at both ends of the top of the bottom plate, and the first baffle plate is fixed on both sides of the top of the bottom plate. The first baffle plate and the second baffle plate are fixed together.

[0018] In a preferred embodiment of the continuous flow aerobic granular sludge self-recirculation reactor provided by the present invention, an inlet pipe and an outlet pipe are respectively fixed on both sides of the interior of one end of the second baffle plate.

[0019] In a preferred embodiment of the continuous flow aerobic granular sludge self-recirculation reactor provided by the present invention, the first turbulence component includes a turbulence element, a third baffle plate and a fourth baffle plate. The fourth baffle plate is fixed to the top of one side of the baffle plate, the third baffle plate is fixed to the top of one side of the baffle plate and at one end of the fourth baffle plate, and the turbulence element is installed on one side of the baffle plate and at the end of the third baffle plate away from the fourth baffle plate.

[0020] In a preferred embodiment of the continuous flow aerobic granular sludge self-recirculation reactor provided by the present invention, the turbulence-inducing component includes a first baffle and a second baffle. The first baffle is fixed to the top of one side of the baffle and is located at the end of the reflux hole near the inlet pipe. The second baffle is fixed to the bottom of one side of the baffle and at the end of the first baffle.

[0021] In a preferred embodiment of the continuous flow aerobic granular sludge self-recirculation reactor provided by the present invention, an aerobic zone is formed inside the first cavity and between the third partition and the first partition, and an anoxic zone is formed inside the first cavity and at the end of the first partition away from the third partition.

[0022] In a preferred embodiment of the continuous flow aerobic granular sludge self-recirculation reactor provided by the present invention, the second turbulence component includes a fifth baffle, a sedimentation plate and a sixth baffle. The fifth baffle and the sixth baffle are fixed at the top of the other side of the baffle and at both ends of the recirculation hole, respectively. The sixth baffle is located at the end of the fifth baffle near the water flow hole. The sedimentation plate is fixed at an incline at the bottom of one side of the baffle and at the bottom end of the fifth baffle.

[0023] In a preferred embodiment of the continuous flow aerobic granular sludge self-recirculation reactor provided by the present invention, a flow channel is provided at the top of the interior of the fifth partition.

[0024] In a preferred embodiment of the continuous flow aerobic granular sludge self-recirculation reactor provided by the present invention, an aerobic zone is formed inside the second cavity and between the fifth partition and the partition plate; an anoxic zone is formed inside the second cavity and at the end of the sixth partition away from the fifth partition; and a sedimentation zone is formed inside the second cavity and at the end of the fifth partition away from the sixth partition.

[0025] A method for using a continuous flow aerobic granular sludge self-recirculation reactor, for any of the above, comprises the following steps:

[0026] S1: Water enters the first cavity through the water inlet pipe and forms turbulence through the first baffle, the second baffle, the third baffle and the fourth baffle;

[0027] S2: The water flowing through the bottom of the fourth partition enters the second cavity through the water flow hole and forms turbulence through the sixth and fifth partitions;

[0028] S3: Through the sedimentation plate, the particles and sediment in the sedimentation zone of the water flow in the second chamber settle by their own weight and flow into the aerobic zone of the second chamber.

[0029] S4: Controls aeration in the aerobic zone inside the second chamber, and achieves liquid reflux between the second and first chambers through the reflux hole.

[0030] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0031] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects:

[0032] This invention provides a continuous flow aerobic granular sludge self-recirculation reactor and method, which combines the sedimentation zone, aerobic zone and anoxic zone through the support and barrier parts, and can continuously feed and discharge water through self-recirculation, thereby saving land, flexibly and simply operating, and having low investment costs; it conforms to the actual operation mode of sewage treatment plants, is easy to modify, and has excellent sewage treatment effect. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a side view of the present invention;

[0036] Figure 3 This is a schematic diagram of the structure of the second partition of the present invention;

[0037] Figure 4 This is a schematic diagram of the sedimentation plate of the present invention;

[0038] Figure 5 This is a first schematic diagram illustrating the pollutant removal performance of the present invention;

[0039] Figure 6 This is a second schematic diagram illustrating the pollutant removal performance of the present invention;

[0040] Figure 7 This is a third schematic diagram illustrating the pollutant removal performance of the present invention;

[0041] Figure 8 This is a fourth schematic diagram illustrating the pollutant removal performance of the present invention;

[0042] Figure 9 This is the particle size distribution diagram of the present invention;

[0043] Figure 10 This is a particle diagram of the first day of the present invention;

[0044] Figure 11 This is a particle diagram taken on day 86 of the present invention;

[0045] Figure 12 This is a particle diagram on day 160 of the present invention.

[0046] In the diagram: 1. Base plate; 2. First barrier plate; 3. Second barrier plate; 4. Inlet pipe; 5. Outlet pipe; 6. Divider plate; 7. Water flow hole; 8. Return hole; 9. First partition plate; 10. Second partition plate; 11. Third partition plate; 12. Fourth partition plate; 13. Fifth partition plate; 14. Flow channel; 15. Sedimentation plate; 16. Sixth partition plate. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0049] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0050] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0051] Example 1

[0052] Reference Figures 1-4 A continuous flow aerobic granular sludge self-recirculation reactor includes a support section and a barrier section. The support section is used to support the barrier section to prevent water flow dispersion. The barrier section is located inside the support section and is used for the removal of pollutants.

[0053] The support includes a base plate 1, a first baffle plate 2, and a second baffle plate 3. The second baffle plate 3 is fixed at both ends of the top of the base plate 1, and the first baffle plate 2 is fixed on both sides of the top of the base plate 1. The first baffle plate 2 and the second baffle plate 3 are fixed together, so that the sludge mixture can flow inside the support composed of the base plate 1, the first baffle plate 2, and the second baffle plate 3. The two sides of the inside of one end of the second baffle plate 3 are respectively fixed with an inlet pipe 4 and an outlet pipe 5, so that water can enter the interior of the support through the inlet pipe 4 and be discharged through the outlet pipe 5 after circulation.

[0054] In this embodiment, a water pump is fixed at the end of the water inlet pipe 4 away from the second barrier plate 3. The input end of the water pump is located in the water inlet tank, so that water can be fed into the interior of the support part through the water pump and the water inlet pipe 4.

[0055] The barrier includes:

[0056] The partition plate 6 is fixed inside the support part and is used to divide the support part into a first cavity and a second cavity;

[0057] Water flow hole 7 is located inside one end of partition plate 6 and is used to allow water inside the first cavity to enter the second cavity through water flow hole 7;

[0058] The return hole 8 is located inside the other end of the partition plate 6 and at the top of the water flow hole 7. It is used to allow water inside the second cavity to flow back into the first cavity through the return hole 8.

[0059] The first turbulence component is located inside the first cavity and is used to turbulent the water entering through the water inlet pipe 4;

[0060] The first turbulence assembly includes a turbulence element, a third partition 11, and a fourth partition 12. The fourth partition 12 is fixed to the top of one side of the partition 6, and the third partition 11 is fixed to the top of one side of the partition 6 and at one end of the fourth partition 12. This allows water to pass through the bottom of the third partition 11 and the fourth partition 12 before entering the interior of the second cavity through the water flow hole 7. A turbulence element is installed on one side of the partition 6 and at the end of the third partition 11 away from the fourth partition 12. This allows water that enters the interior of the first cavity through the water inlet pipe 4 to be turbulent by the turbulence element and then flow into the bottom of the third partition 11.

[0061] The flow-disrupting component includes a first baffle 9 and a second baffle 10. The first baffle 9 is fixed to the top of one side of the baffle 6 and is located at the end of the return hole 8 near the water inlet pipe 4, so that the water entering through the water inlet pipe 4 can only flow through the gap between the bottom of the first baffle 9 and the bottom plate 1. The second baffle 10 is fixed to the bottom of one side of the baffle 6 and at one end of the first baffle 9, so that the water flowing through the bottom of the first baffle 9 can only continue to flow through the top of the second baffle 10.

[0062] Preferably, an aerobic zone is formed inside the first cavity and between the third partition 11 and the first partition 9, and an anoxic zone is formed inside the first cavity and at the end of the first partition 9 away from the third partition 11.

[0063] In this embodiment, there are two sets of flow-dispersing components. In other embodiments, the number can be set as needed, so that the water flow can be made smooth by the flow-dispersing components.

[0064] The second turbulence component, located inside the second cavity, is used to turbulent the water entering the second cavity.

[0065] The second turbulence assembly includes a fifth partition 13, a sedimentation plate 15, and a sixth partition 16. The fifth partition 13 and the sixth partition 16 are fixed to the top of the other side of the partition plate 6 and to both ends of the return hole 8, respectively. The sixth partition 16 is located at the end of the fifth partition 13 near the water flow hole 7, so that water can enter the second cavity through the water flow hole 7, and then enter between the fifth partition 13 and the sixth partition 16 through the bottom of the sixth partition 16. When the water level is high, it flows back into the first cavity through the return hole 8. A flow groove 14 is opened at the top of the interior of the fifth partition 13, and the bottom end of the flow groove 14 is located at the bottom of the return hole 8, and the top end of the flow groove 14 is located at the top of the return hole 8. The sedimentation plate 15 is fixed at an incline on the bottom of one side of the partition plate 6 and at the bottom end of the fifth partition 13, so that the sludge can settle by its own weight and the incline of the sedimentation plate 15.

[0066] Preferably, an aerobic zone is formed inside the second cavity and between the fifth partition 13 and the partition plate 6, an anoxic zone is formed inside the second cavity and at the end of the sixth partition 16 away from the fifth partition 13, and a sedimentation zone is formed inside the second cavity and at the end of the fifth partition 13 away from the sixth partition 16.

[0067] In this embodiment, an existing timing control system is also included, which can automatically control the aeration time.

[0068] The operation process of the continuous flow aerobic granular sludge self-recirculation reactor and method provided by this invention is as follows: During operation, influent enters the first chamber through the influent pipe 4. The water then flows through the turbulence of the first baffle 9, second baffle 10, third baffle 11, and fourth baffle 12, before flowing into the second chamber through the water flow hole 7. Inside the second chamber, due to the liquid level difference, the water enters the aerobic zone through the bottom of the sixth baffle 16. The water then flows through the flow channel 14 and the bottom of the fifth baffle 13 into the sedimentation zone. Simultaneously, the sludge in the sedimentation zone sinks due to gravity and passes through the sedimentation plate 15. The tilting mechanism allows larger particles to settle and flow back into the aerobic zone of the second chamber. Simultaneously, the rising air bubbles generated by aeration in the aerobic zone of the second chamber cause the liquid level to rise. At this point, the liquid level difference between the aerobic zone and the aerobic zone in the first chamber promotes the self-recirculation of sludge, causing it to flow back into the aerobic zone of the first chamber. At the same time, the rising air bubbles in the aerobic zone of the first chamber also cause the liquid level to rise, thus promoting the self-circulation of sludge between the first and second chambers through the liquid level difference, forming an internal circulation of granular sludge. Furthermore, the use of a pressure differential drive system avoids damage to the AGS by peristaltic pumps, and the post-anoxic aerobic tank and aerobic tank improve the removal efficiency of pollutants.

[0069] Example 2

[0070] Based on the above embodiment one, its usage method is disclosed, and the steps are as follows:

[0071] S1: Water enters the first cavity through the water inlet pipe 4 and forms turbulence through the first partition 9, the second partition 10, the third partition 11 and the fourth partition 12;

[0072] S2: The water flowing through the bottom of the fourth partition 12 enters the second cavity through the water flow hole 7 and forms turbulence through the sixth partition 16 and the fifth partition 13;

[0073] S3: Through the sedimentation plate 15, the particles and sediment in the sedimentation zone of the water flow in the second chamber settle by their own weight and flow into the aerobic zone of the second chamber.

[0074] S4: Controls aeration in the aerobic zone inside the second chamber, and achieves liquid reflux between the second and first chambers through the reflux hole 8.

[0075] Example 3

[0076] refer to Figures 5-12 Based on the above-described Example 2, the performance of the continuous flow aerobic granular sludge self-recirculation reactor is disclosed.

[0077] Aerobic granular sludge: Aerobic granular sludge has been successfully cultivated, with 68% of the granular sludge being >200μm.

[0078] Pollutant removal performance:

[0079] refer to Figure 5 On day 1, the COD removal rate was 55.95%, which gradually increased to 90.96% on day 30. After day 30, it stabilized and remained between 90% and 93%.

[0080] refer to Figure 6 On the first day, NH4 + The removal rate of -N was 41.29%, which gradually increased to about 90.80% on day 54. After day 54, it tended to stabilize, with the removal rate remaining between 90% and 96%.

[0081] refer to Figure 7 On day 1, the TN removal rate was 34.41%, which gradually increased to about 77.07% on day 54. After day 54, it tended to stabilize, with the removal rate remaining between 77% and 82%.

[0082] refer to Figure 8 On day 1, the TP removal rate was 36.79%, which gradually increased to about 90.13% on day 48. After day 48, it tended to stabilize, with the removal rate remaining between 92% and 96%.

[0083] refer to Figure 9 The paper discloses the particle size distribution of a continuous flow aerobic granular sludge self-recirculation reactor during its use.

[0084] refer to Figures 10-12 The present invention discloses a continuous flow aerobic granular sludge self-recirculation reactor, and schematic diagrams showing the condition of the granules on day 1, day 86, and day 160 during use.

[0085] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A continuous flow aerobic granular sludge self-recirculation reactor, characterized in that, It includes a support part and a barrier part. The support part is used to support the barrier part to prevent water flow from spreading. The barrier part is located inside the support part and is used to remove pollutants. The barrier includes: A partition plate (6) is fixed inside the support portion and is used to divide the support portion into a first cavity and a second cavity; The water flow hole (7) is located inside one end of the partition plate (6) and is used to allow water inside the first cavity to enter the second cavity through the water flow hole (7); The return hole (8) is located inside the other end of the partition plate (6) and at the top of the water flow hole (7), and is used to allow water inside the second cavity to flow back into the first cavity through the return hole (8); The first turbulence component is located inside the first cavity and is used to turbulent the water entering through the water inlet pipe (4); The second turbulence component, located inside the second cavity, is used to turbulent the water entering the second cavity; The first turbulence assembly includes a turbulence element, a third partition (11) and a fourth partition (12). The fourth partition (12) is fixed to the top of one side of the partition (6). The third partition (11) is fixed to the top of one side of the partition (6) and at one end of the fourth partition (12). The turbulence element is installed on one side of the partition (6) and at one end of the third partition (11) away from the fourth partition (12). The turbulence-disrupting component includes a first partition (9) and a second partition (10). The first partition (9) is fixed to the top of one side of the partition (6), and the first partition (9) is located at one end of the return hole (8) near the water inlet pipe (4). The second partition (10) is fixed to the bottom of one side of the partition (6) and at one end of the first partition (9). An aerobic zone is formed inside the first cavity and between the third partition (11) and the first partition (9), and an anoxic zone is formed inside the first cavity and at the end of the first partition (9) away from the third partition (11). The second turbulence assembly includes a fifth baffle (13), a sedimentation plate (15), and a sixth baffle (16). The fifth baffle (13) and the sixth baffle (16) are fixed on the top of the other side of the baffle (6) and at both ends of the return hole (8), respectively. The sixth baffle (16) is located at the end of the fifth baffle (13) near the water flow hole (7). The sedimentation plate (15) is fixed at an incline on the bottom side of the baffle (6) and at the bottom end of the fifth baffle (13). An aerobic zone is formed inside the second cavity and between the fifth partition (13) and the partition plate (6). An anoxic zone is formed inside the second cavity and at the end of the sixth partition (16) away from the fifth partition (13). A sedimentation zone is formed inside the second cavity and at the end of the fifth partition (13) away from the sixth partition (16). The aerobic zone inside the second chamber and the aerobic zone inside the first chamber are connected by a return hole (8) to achieve liquid level difference-driven return.

2. The continuous flow aerobic granular sludge self-recirculation reactor according to claim 1, characterized in that, The support includes a base plate (1), a first barrier plate (2) and a second barrier plate (3). The second barrier plate (3) is fixed at both ends of the top of the base plate (1), and the first barrier plate (2) is fixed on both sides of the top of the base plate (1). The first barrier plate (2) and the second barrier plate (3) are fixed together.

3. The continuous flow aerobic granular sludge self-recirculation reactor according to claim 2, characterized in that, The second barrier plate (3) has an inlet pipe (4) and an outlet pipe (5) fixed on both sides of one end of its interior.

4. The continuous flow aerobic granular sludge self-recirculation reactor according to claim 1, characterized in that, The top of the fifth partition (13) is provided with a flow groove (14).

5. A method of using a continuous flow aerobic granular sludge self-recirculation reactor, for use in the continuous flow aerobic granular sludge self-recirculation reactor according to any one of claims 1-4, characterized in that, The steps are as follows: S1: Water enters the first cavity through the water inlet pipe (4) and forms turbulence through the first partition (9), the second partition (10), the third partition (11) and the fourth partition (12); S2: The water flowing through the bottom of the fourth partition (12) enters the second cavity through the water flow hole (7) and forms turbulence through the sixth partition (16) and the fifth partition (13); S3: Through the sedimentation plate (15), the particles and sediments in the sedimentation zone inside the second cavity settle by their own weight and flow into the aerobic zone inside the second cavity; S4: Control the aeration of the aerobic zone inside the second chamber, and realize the liquid surface reflux between the second chamber and the first chamber through the reflux hole (8).

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