Novel moving bed bio-membrane reactor for deep denitrification

Abstract

The invention belongs to the technical field of sewage treatment, and discloses a novel moving bed bio-membrane reactor for deep denitrification. The double-cylinder partition system is arranged, the first cylinder and the second cylinder are of a radial partition structure, an anoxic zone and a micro-aerobic zone are formed in the reactor at the same time, directional culture of microorganisms is achieved, and then deep denitrification is achieved. Sewage enters the second cylinder through the water inlet pipe, moves upwards to climb to the left side of the partition plate under the pushing of aeration on the right side of the partition plate and flows back to the right side area of the partition plate under stirring of the stirrer, and internal circulation of the sewage is achieved. The micro-aerobic environment in the second cylinder is beneficial to growth and enrichment of denitrifying functional bacteria on the filler, so that synergistic denitrification of partial nitrosation-anaerobic ammonia oxidation reaction is realized. Sewage can flow into the anoxic zone between the first cylinder and the second cylinder through a water outlet hole in the bottom of the second cylinder and micropores in the side wall, and a biological rope type filler is arranged in the anoxic zone and can provide ecological niche for enrichment of denitrifying bacteria. Sewage overflows out of the reactor from a drain pipe at the top of the reactor, but flocculent sludge sinks along the inclined surface of the first cylinder, so that efficient separation of sludge and water is realized. According to the reactor, directional enrichment of denitrification function microorganisms is realized in a manner of arranging different functional areas, and particularly, the anoxic area arranged before effluent is beneficial to solving the problem of high nitrate nitrogen concentration in partial nitrosation-anaerobic ammonia oxidation effluent, so that deep denitrification treatment of sewage is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a novel moving bed biofilm reactor for deep denitrification. Background Art

[0002] Wastewater treatment refers to the process of purifying wastewater by separating pollutants from it or converting them into harmless substances through physical, chemical or biological methods. This process aims to ensure that wastewater meets the water quality requirements for discharge into water bodies or reuse, and is an important measure for water resource protection and environmental protection.

[0003] The moving bed biofilm reactor is an efficient sewage treatment method that combines the high efficiency and operational flexibility of the activated sludge method with the advantages of the traditional biofilm method, such as resistance to shock loads, long sludge age, and small amount of residual sludge. Although the existing moving bed biofilm reactor can play a role in sewage treatment, there are some problems in actual use, such as sludge loss, floating filler and easy clogging, so it needs to be improved. Summary of the Invention

[0004] The object of the present invention is to provide a novel moving bed biofilm reactor for deep denitrification to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: A novel moving bed biofilm reactor for deep denitrification, comprising a reactor shell, a bottom plate fixedly sleeved on the bottom of the inner surface of the reactor shell, a first cylinder fixedly connected to the top of the bottom plate, a second cylinder fixedly installed on the top of the inner surface of the bottom plate, a water outlet hole provided at the bottom of the second cylinder, micropores provided on the side wall of the second cylinder, a partition fixedly installed inside the second cylinder, a water inlet pipe fixedly sleeved on the right side of the second cylinder, the right end of the water inlet pipe sequentially penetrates the second cylinder, the first cylinder and the reactor shell and extends to the outside of the reactor shell and is fixedly sleeved with the first cylinder and the inner wall of the reactor shell respectively, an outlet pipe fixedly sleeved on the top left side of the first cylinder, the left end of the outlet pipe penetrates the reactor shell and extends to the outside of the reactor shell and is fixedly sleeved with the inner wall of the reactor shell, and a disc aeration stone located on the right side of the partition is fixedly installed on the top of the bottom plate.

[0006] Preferably, a connecting pipe is fixedly installed on the right side of the disc aeration stone, and the right end of the connecting pipe passes through the second cylinder, the first cylinder and the reactor shell in sequence and extends to the outside of the reactor shell.

[0007] Preferably, a water injection pipe is fixedly sleeved inside the left bottom end of the reactor shell for injecting water into the water bath layer of the reactor, and a sealing cap is threadedly sleeved on the outer surface of the water injection pipe.

[0008] Preferably, a heating plate is fixedly sleeved inside the reactor shell.

[0009] Preferably, a top plate is fixedly mounted on the top of the reactor shell, and the bottom of the top plate is fixedly connected to the top of the first cylinder.

[0010] Preferably, a bolt is fixedly installed on the left side of the top of the top plate, and there are two bolts. The outer surfaces of the two bolts are movably sleeved with a mounting plate.

[0011] Preferably, a nut is threadedly sleeved on the outer surface of the bolt, and the bottom of the nut is movably connected to the top of the mounting plate.

[0012] Preferably, a motor is fixedly mounted on the right side of the top of the mounting plate, and a stirring rod is fixedly connected to the other end of the motor output shaft. The bottom end of the stirring rod passes through the mounting plate and extends to the bottom of the mounting plate and is movably connected to the inner wall of the mounting plate.

[0013] Preferably, stirring blades are fixedly mounted on the outer surface of the stirring rod, and there are nine stirring blades, which are of the same size.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By setting up a double-cylinder zoning mode, anoxic zones and micro-aerobic zones are simultaneously formed in the reactor, realizing the directional zoning cultivation of denitrifying microorganisms with different functions. This not only improves the efficiency of different denitrifying functional bacteria, but also solves the problem of large floor space occupied by traditional processes.

[0016] 2. Under the push of aeration on the right side of the partition in the second cylinder, the sewage moves upward and crosses to the left side of the partition, and flows back to the right side of the partition under the stirring of the left mixer, realizing the internal circulation of sewage and preventing the floating and accumulation of fillers.

[0017] 3. The micro-aerobic environment in the second cylinder helps the denitrification functional bacteria to grow and enrich on the filler, achieving partial nitrite-anaerobic ammonium oxidation reaction synergistic denitrification.

[0018] 4. Both the first cylinder and the second cylinder have an inclined angle. The inclined cylinder wall is conducive to sludge reflux, which can solve the shortcoming of easy loss of sludge in the continuous flow reactor.

[0019] 5. The sludge in the second cylinder can pass through the micropores into the anoxic zone outside the second cylinder and form a membrane on the rope-shaped filler. This solves the problem of high nitrate nitrogen concentration in the effluent of partial nitrite-anaerobic ammonium oxidation in the second cylinder and realizes deep denitrification treatment of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic cross-sectional structural diagram of the front side of the present invention;

[0022] Figure 3 This is a schematic diagram of the top structure of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the second cylinder of the present invention;

[0024] Figure 5 Schematic diagram of the cross-sectional structure of the separator of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the back side of the present invention;

[0026] Figure 7 for Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0027] In the figure: 1. Reactor shell; 2. Bottom plate; 3. First cylinder; 4. Second cylinder; 5. Water outlet; 6. Partition; 7. Water inlet pipe; 8. Water outlet pipe; 9. Disc aeration stone; 10. Connecting pipe; 11. Water injection pipe; 12. Sealing cover; 13. Heating plate; 14. Top plate; 15. Bolt; 16. Mounting plate; 17. Nut; 18. Motor; 19. Stirring rod; 20. Stirring blade; 21. Micropore. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] like Figures 1 to 7As shown, an embodiment of the present invention provides a novel moving bed biofilm reactor for deep denitrification, comprising a reactor shell 1, a bottom plate 2 is fixedly sleeved on the bottom of the inner surface of the reactor shell 1, a first cylinder 3 is fixedly connected to the top of the bottom plate 2, a second cylinder 4 is fixedly installed on the top of the inner surface of the bottom plate 2, a water outlet hole 5 is opened at the bottom of the second cylinder 4, a micropore 21 is opened on the side wall of the second cylinder 4, a partition 6 is fixedly installed inside the second cylinder 4, an inlet pipe 7 is fixedly sleeved on the right side of the second cylinder 4, the right end of the inlet pipe 7 passes through the second cylinder 4, the first cylinder 3 and the reactor shell 1 in sequence and extends to the outside of the reactor shell 1 and is fixedly sleeved with the first cylinder 3 and the inner wall of the reactor shell 1 respectively, a water outlet pipe 8 is fixedly sleeved on the top of the left side of the first cylinder 3, the left end of the water outlet pipe 8 passes through the reactor shell 1 and extends to the outside of the reactor shell 1 and is fixedly sleeved with the inner wall of the reactor shell 1, and a disc aeration stone 9 is fixedly installed on the top of the bottom plate 2 and is located on the right side of the partition 6.

[0030] The bottom of the partition 6 is lower than the bottom of the water inlet pipe 7, so that when the water inlet pipe 7 is draining water into the interior of the second cylinder 4, it can prevent sewage from directly entering the left side of the partition 6. After the disc aeration stone 9 is started, the disc aeration stone 9 will introduce air into the sewage, generating sufficient stirring and mixing effects to promote the water to circulate upward. When the sewage enters the interior of the second cylinder 4 through the water inlet pipe 7, it will move upward under the action of the disc aeration stone 9, thereby flowing through the top of the partition 6 to the left side of the partition 6. In addition, through the nested design of the second cylinder 4 and the first cylinder 3, functional zoning is achieved, and the living environment of different microorganisms is physically isolated, which significantly improves the activity of functional bacteria. The partition structure design of the first cylinder and the second cylinder forms a micro-oxygen zone and an anoxic zone, which are filled with different fillers respectively, so that functional microorganisms can be directionally formed in their respective suitable areas to improve the denitrification efficiency.

[0031] A connecting pipe 10 is fixedly installed on the right side of the disc aeration stone 9 , and the right end of the connecting pipe 10 passes through the second cylinder 4 , the first cylinder 3 and the reactor shell 1 in sequence and extends to the outside of the reactor shell 1 .

[0032] The operator can connect the external air pump to the connecting pipe 10 to start the disc aeration stone 9, and introduce air into the wastewater to produce sufficient stirring and mixing effect, promote the circulation of water, and help microorganisms to form biofilm while achieving full contact and mixing between the filler and the sewage.

[0033] A water injection pipe 11 is fixedly sleeved inside the bottom end of the left side of the reactor shell 1 , and a sealing cover 12 is threadedly sleeved on the outer surface of the water injection pipe 11 .

[0034] The operator can release the sealing effect on the water injection pipe 11 by rotating the sealing cover 12, so that the water between the reactor shell 1 and the first cylinder 3 can be discharged through the water injection pipe 11, or water can be injected into the space between the reactor shell 1 and the first cylinder 3.

[0035] A heating plate 13 is fixedly sleeved inside the reactor shell 1 .

[0036] By setting up the heating plate 13, the heating plate 13 can generate heat after startup, thereby heating the sewage between the reactor shell 1 and the first cylinder 3, and then heating the sewage inside the first cylinder 3 and the second cylinder 4 in a water bath, thereby ensuring the smooth progress of the deep denitrification reaction.

[0037] A top plate 14 is fixedly mounted on the top of the reactor shell 1 , and the bottom of the top plate 14 is fixedly connected to the top of the first cylinder 3 .

[0038] By providing the top plate 14 , the top plate 14 can connect, stabilize and reinforce the first cylinder 3 .

[0039] A bolt 15 is fixedly installed on the left side of the top of the top plate 14 . There are two bolts 15 , and mounting plates 16 are movably sleeved on the outer surfaces of the two bolts 15 .

[0040] By providing the bolts 15 , the bolts 15 can install and fix the mounting plate 16 . The operator can remove the mounting plate 16 from the outer surface of the bolts 15 by moving the mounting plate 16 upward.

[0041] The outer surface of the bolt 15 is threadedly sleeved with a nut 17 , and the bottom of the nut 17 is movably connected to the top of the mounting plate 16 .

[0042] The operator can tighten and fix the mounting plate 16 by rotating the nut 17 .

[0043] Among them, a motor 18 is fixedly installed on the right side of the top of the mounting plate 16, and the other end of the output shaft of the motor 18 is fixedly connected to a stirring rod 19. The bottom end of the stirring rod 19 passes through the mounting plate 16 and extends to the bottom of the mounting plate 16 and is movably connected to the inner wall of the mounting plate 16.

[0044] The operator can start the motor 18 to rotate the stirring rod 19 .

[0045] A stirring blade 20 is fixedly mounted on the outer surface of the stirring rod 19 . There are nine stirring blades 20 , and the nine stirring blades 20 have the same size.

[0046] When the stirring rod 19 rotates, the stirring blade 20 will be driven to rotate, thereby stirring the sewage so that the sludge and sewage are fully and evenly mixed. The second cylinder 4 is filled with filler, but due to its own characteristics, the filler will float and accumulate on the top. Under the stirring action, the filler will flow with the water flow, sink into the water body, and flow with the water flow in the reactor, so as to better contact with the sludge, facilitate the attachment of microorganisms, and avoid the floating and accumulation of filler.

[0047] Working principle and usage process:

[0048] When in use, the operator first pours the filler and activated sludge (about 1 / 3 to 1 / 2 of the effective volume of the second cylinder) into the interior of the second cylinder 4 respectively, and then starts the disc aeration stone 9. The disc aeration stone 9 will introduce air into the sewage, prompting the water to circulate upward, and then inject the sewage into the interior of the second cylinder 4 through the water inlet pipe 7, so that the sewage flows upward under the action of the disc aeration stone 9, and then flows to the left side of the partition 6 through the top of the partition 6. At this time, by starting the motor 18, the stirring rod 19 drives the stirring blade 20 to rotate, so that the stirring blade 20 stirs the sewage, so that the sewage and sludge are fully mixed, and the sewage and the filler are fully mixed.

[0049] Then, the operator injects water into the space between the reactor shell 1 and the first cylinder 3 through the water injection pipe 11, and starts the heating plate 13 to heat the water source between the reactor shell 1 and the first cylinder 3, so that the sewage inside the first cylinder 3 and the second cylinder 4 can be heated in a water bath, so that the deep denitrification reaction can be fully carried out, and the heat can be transferred to the sewage inside the second cylinder 4, which can meet the needs of the sewage treatment process without the need for additional heating, saving energy.

[0050] The sewage will flow into the space between the first cylinder 3 and the second cylinder 4 through the bottom outlet hole 5, and finally flow out through the top outlet pipe 8. The sludge in the sewage will gradually flow back to the bottom of the bottom plate 2 along the slope of the first cylinder 3 under the action of gravity, thereby avoiding the outflow of sludge, maintaining the biomass, achieving the purpose of continuous sewage treatment, and improving sewage treatment efficiency.

[0051] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A novel moving bed biofilm reactor for deep denitrification, comprising a reactor shell (1), characterized in that: The bottom of the inner surface of the reactor shell (1) is fixedly sleeved with a bottom plate (2), the top of the bottom plate (2) is fixedly connected with a first cylinder (3), the top of the inner surface of the bottom plate (2) is fixedly installed with a second cylinder (4), the bottom of the second cylinder (4) is provided with a water outlet (5), the side wall of the second cylinder (4) is provided with a micro hole (21), the interior of the second cylinder (4) is fixedly installed with a partition (6), the interior of the right side of the second cylinder (4) is fixedly sleeved with a water inlet pipe (7), the right end of the water inlet pipe (7) is sequentially penetrated The second cylinder (4), the first cylinder (3) and the reactor shell (1) extend to the outside of the reactor shell (1) and are fixedly sleeved with the inner walls of the first cylinder (3) and the reactor shell (1), respectively. A water outlet pipe (8) is fixedly sleeved inside the top left side of the first cylinder (3). The left end of the water outlet pipe (8) passes through the reactor shell (1) and extends to the outside of the reactor shell (1) and is fixedly sleeved with the inner wall of the reactor shell (1). A disc aeration stone (9) located on the right side of the partition (6) is fixedly installed on the top of the bottom plate (2).

2. A novel moving bed biofilm reactor for deep denitrification according to claim 1, characterized in that: A connecting pipe (10) is fixedly installed on the right side of the disc aeration stone (9), and the right end of the connecting pipe (10) sequentially passes through the second cylinder (4), the first cylinder (3) and the reactor shell (1) and extends to the outside of the reactor shell (1).

3. A novel moving bed biofilm reactor for deep denitrification according to claim 1, characterized in that: A water injection pipe (11) is fixedly sleeved inside the bottom left end of the reactor shell (1) for injecting water into the water bath layer of the reactor, and a sealing cover (12) is threadedly sleeved on the outer surface of the water injection pipe (11).

4. The novel moving bed biofilm reactor for deep denitrification according to claim 1, characterized in that: A heating plate (13) is fixedly sleeved inside the reactor shell (1).

5. The novel moving bed biofilm reactor for deep denitrification according to claim 1, characterized in that: A top plate (14) is fixedly mounted on the top of the reactor shell (1), and the bottom of the top plate (14) is fixedly connected to the top of the first cylinder (3).

6. A novel moving bed biofilm reactor for deep denitrification according to claim 5, characterized in that: A bolt (15) is fixedly installed on the left side of the top of the top plate (14), and there are two bolts (15). The outer surfaces of the two bolts (15) are movably sleeved with a mounting plate (16).

7. A novel moving bed biofilm reactor for deep denitrification according to claim 6, characterized in that: The outer surface of the bolt (15) is threadedly sleeved with a nut (17), and the bottom of the nut (17) is movably connected to the top of the mounting plate (16).

8. A novel moving bed biofilm reactor for deep denitrification according to claim 6, characterized in that: A motor (18) is fixedly mounted on the right side of the top of the mounting plate (16), and a stirring rod (19) is fixedly connected to the other end of the output shaft of the motor (18). The bottom end of the stirring rod (19) passes through the mounting plate (16) and extends to the bottom of the mounting plate (16) and is movably connected to the inner wall of the mounting plate (16).

9. A novel moving bed biofilm reactor for deep denitrification according to claim 8, characterized in that: A stirring blade (20) is fixedly mounted on the outer surface of the stirring rod (19). There are nine stirring blades (20) and the nine stirring blades (20) have the same size.

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