Vibration bed sulfur autotrophic denitrification bioreactor

Abstract

The utility model belongs to the technical field of sewage treatment, and discloses a vibrating bed sulfur autotrophic denitrification bioreactor which comprises a reactor shell and a filler bracket, the bottom of the reactor shell is communicated with a water inlet pipe, the upper end of the reactor shell is communicated with a water outlet pipe, and the top of the reactor shell is fixedly provided with a top cover through a bolt; the filler support is arranged in the reactor shell, the side face of the lower end of the filler support is fixedly connected with a sulfur-based fiber carrier, a first assembly hole is formed in the top cover, and the upper end of the filler support extends out of the reactor shell from the first assembly hole; according to the utility model, the vibration mechanism is arranged, so that the sulfur-based fiber carriers can be driven to vibrate, the situation that gaps among the fillers become smaller and are hardened due to excessive accumulation of microorganisms on the surfaces of the fillers is avoided, and the reactor is prevented from being blocked; the long-term stable operation of the reactor is ensured.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a vibrating bed sulfur autotrophic denitrification bioreactor. Background Technology

[0002] For urban wastewater treatment plants, nitrogen compounds are among the most prevalent pollutants. Their accumulation leads to eutrophication, causing a series of problems such as oxygen depletion, increased turbidity, and foul odors, severely impacting water quality and aquatic ecosystem security. Therefore, achieving efficient removal of nitrogen pollutants and ensuring safe drinking water for residents is a crucial mission for urban wastewater treatment plants.

[0003] The nitrification-denitrification biological process is currently the most commonly used nitrogen removal technology in wastewater treatment plants. The denitrification stage works by denitrifying bacteria reducing nitrates to nitrogen gas in an anaerobic environment, using organic carbon sources as electron donors. Therefore, to achieve efficient nitrogen removal, wastewater treatment plants often supplement with additional organic carbon sources to obtain higher denitrification efficiency. However, this method increases the cost of chemicals during operation, and from a long-term perspective, it is not conducive to the operation of wastewater treatment plants.

[0004] For the reasons mentioned above, sulfur autotrophic denitrification has attracted widespread attention due to its high nitrogen removal efficiency and the fact that it does not require additional organic carbon sources. The nitrogen removal principle of sulfur autotrophic denitrification is that sulfur autotrophic denitrifying bacteria use elemental sulfur or other reduced sulfides as electron donors to reduce nitrates to nitrogen gas. Because elemental sulfur is low in cost, readily available, and has low toxicity, current sulfur autotrophic denitrification processes mainly use elemental sulfur particles as packing material to provide the sulfur source required for the reaction, and construct fixed-bed reactors by stacking the packing particles within a container. Furthermore, in recent years, some sulfur-based composite packing materials have been developed, such as mixing a certain proportion of limestone powder, iron powder, and sawdust powder into the raw materials used to make granular packing materials, to solve problems such as low efficiency and acid / alkali consumption in elemental sulfur-based autotrophic denitrification, gradually realizing the engineering application of sulfur autotrophic denitrification technology.

[0005] The drawback of the aforementioned fixed-bed sulfur autotrophic denitrification bioreactor is that, during reactor operation, the solid granular packing material remains stationary. As the reactor continues to operate, microorganisms on the surface of the packing material multiply and accumulate, causing the gaps between the packing materials to gradually shrink, eventually leading to caking and reactor blockage. Furthermore, nitrogen gas produced during denitrification also accumulates in the gaps between the packing materials due to blockage, affecting the contact between wastewater and microorganisms, reducing mass transfer efficiency, and preventing the reactor from operating stably and efficiently.

[0006] Currently, backwashing is the method to solve the clogging problem of sulfur autotrophic denitrification fixed-bed reactors. However, the backwashing process also has some negative impacts on the reactor, including:

[0007] (1) Backwashing inevitably washes away the biofilm structure on the surface of the packing material during the process of solving the clogging problem, reducing the biomass in the reactor.

[0008] (2) The backwashing process introduces a large amount of oxygen, which destroys the anaerobic environment required for the denitrification process, thus leading to a decrease in nitrogen removal efficiency;

[0009] (3) During the backwashing process, water or air will preferentially pass through the channels with lower resistance in the packing layer, which leads to the phenomenon of "channeling" and makes it impossible to completely solve the problem of reactor blockage.

[0010] Therefore, we propose a vibrating bed sulfur autotrophic denitrification bioreactor. Utility Model Content

[0011] The purpose of this invention is to provide a vibrating bed sulfur autotrophic denitrification bioreactor, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0012] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0013] A vibrating bed sulfur autotrophic denitrification bioreactor includes a reactor shell and a packing support. The bottom of the reactor shell is connected to an inlet pipe, and the top of the reactor shell is connected to an outlet pipe. A top cover is fixedly installed on the top of the reactor shell by bolts. The packing support is disposed inside the reactor shell. A sulfur-based fiber carrier is fixedly connected to the lower side of the packing support. A first assembly hole is provided on the top cover. The upper end of the packing support extends from the first assembly hole to the outside of the reactor shell. A vibration mechanism capable of driving the sulfur-based fiber carrier on the packing support to vibrate is provided at the upper end of the packing support.

[0014] In a vibrating bed sulfur autotrophic denitrification bioreactor according to the present invention, the vibration mechanism includes a mounting base, the mounting base being detachably mounted on the upper end of the packing support, a motor base being fixedly mounted on the top of the mounting base, and a vibration motor being fixedly mounted on the motor base.

[0015] In a vibrating bed sulfur autotrophic denitrification bioreactor according to the present invention, a rubber shock-absorbing pad is fixedly installed between the bottom of the mounting base and the top of the top cover.

[0016] In a vibrating bed sulfur autotrophic denitrification bioreactor according to the present invention, an elastic sealing ring is fixedly installed inside the first assembly hole, and the elastic sealing ring is slidably sleeved on the packing support.

[0017] According to the present invention, a vibrating bed sulfur autotrophic denitrification bioreactor further includes an assembly bolt. The top of the mounting base has a second assembly hole. The mounting base is sleeved on the packing support through the second assembly hole. The upper end of the packing support has a threaded hole. A connecting block is fixedly connected to the top of the second assembly hole. A third assembly hole is opened on the connecting block. One end of the assembly bolt passes through the connecting block and is threadedly fixedly connected to the threaded hole.

[0018] In a vibrating bed sulfur autotrophic denitrification bioreactor according to the present invention, a support leg is fixedly installed at the lower end of the reactor shell.

[0019] This utility model has at least the following beneficial effects:

[0020] This invention, by setting a vibration mechanism, can drive the sulfur-based fiber carrier to vibrate, avoiding excessive accumulation of microorganisms on the surface of the packing material, which would lead to smaller gaps and caking between the packing materials, thus preventing reactor blockage and ensuring long-term stable operation of the reactor. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the vibrating bed sulfur autotrophic denitrification bioreactor of this utility model;

[0023] Figure 2 for Figure 1 A magnified structural diagram of part A in the diagram;

[0024] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 4 This is a schematic diagram of the mounting base of this utility model.

[0026] Explanation of icon numbers:

[0027] 1. Reactor shell; 101. Inlet pipe; 102. Outlet pipe; 103. Top cover; 1031. First assembly hole; 1032. Elastic sealing ring; 104. Support leg;

[0028] 2. Packing support; 201. Threaded hole; 3. Sulfur-based fiber carrier; 4. Vibration motor; 401. Motor base; 5. Mounting base; 501. Second assembly hole; 502. Connecting block; 503. Third assembly hole; 504. Assembly bolt; 6. Rubber shock absorber. Detailed Implementation

[0029] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0030] Please refer to Figures 1 to 4 As shown, an embodiment of this utility model provides a vibrating bed sulfur autotrophic denitrification bioreactor, including a reactor shell 1 and a packing support 2. The bottom of the reactor shell 1 is connected to an inlet pipe 101, and the upper end of the reactor shell 1 is connected to an outlet pipe 102. A top cover 103 is fixedly installed on the top of the reactor shell 1 by bolts. The packing support 2 is disposed inside the reactor shell 1. A sulfur-based fiber carrier 3 is fixedly connected to the lower side of the packing support 2. A first assembly hole 1031 is provided on the top cover 103. The upper end of the packing support 2 extends from the first assembly hole 1031 to the outside of the reactor shell 1. A vibration mechanism capable of driving the sulfur-based fiber carrier 3 on the packing support 2 to vibrate is provided on the upper end of the packing support 2. In this embodiment, the vibration mechanism includes a mounting base 5. The mounting base 5 is detachably installed on the upper end of the packing support 2. A motor base 401 is fixedly installed on the top of the mounting base 5, and a vibration motor 4 is fixedly installed on the motor base 401.

[0031] By setting up a vibration motor 4 to drive the sulfur-based fiber carrier 3 to vibrate, the problem of easy clogging of the packing material in traditional fixed-bed reactors is fundamentally solved, ensuring the smooth flow of wastewater and the continuous reaction in the reactor.

[0032] In this embodiment, a rubber shock-absorbing pad 6 is fixedly installed between the bottom of the mounting base 5 and the top of the top cover 103. The rubber shock-absorbing pad 6 effectively reduces the transmission of vibration generated by the vibration motor 4 during operation to the reactor shell 1 and the surrounding environment. On the one hand, it reduces the noise during equipment operation and improves the working environment; on the other hand, it reduces the impact of vibration on the reactor shell 1 and its internal structure, prevents loosening and damage of components due to long-term vibration, improves the stability and reliability of the equipment, and extends the service life of the equipment.

[0033] In this embodiment, an elastic sealing ring 1032 is fixedly installed inside the first assembly hole 1031. The elastic sealing ring 1032 is slidably sleeved on the packing support 2, and the installation of the elastic sealing ring 1032 ensures the sealing of the reactor. During the vibration of the packing support 2, it allows relative movement while effectively preventing sewage leakage from the reactor, thus avoiding sewage overflow and environmental pollution. At the same time, it prevents the entry of outside air, maintains the anaerobic environment inside the reactor, and provides suitable survival and reaction conditions for sulfur autotrophic denitrifying bacteria, which is beneficial to improving the efficiency and stability of the denitrification reaction.

[0034] In this embodiment, it also includes an assembly bolt 504. The top of the mounting base 5 is provided with a second assembly hole 501. The mounting base 5 is sleeved on the packing bracket 2 through the second assembly hole 501. The upper end of the packing bracket 2 is provided with a threaded hole 201. A connecting block 502 is fixedly connected to the top of the second assembly hole 501. A third assembly hole 503 is provided on the connecting block 502. One end of the assembly bolt 504 passes through the connecting block 502 and is threadedly fixedly connected in the threaded hole 201.

[0035] The above-mentioned design facilitates the installation and disassembly of the mounting base 5 and the packing bracket 2.

[0036] In this embodiment, a support leg 104 is fixedly installed at the lower end of the reactor shell 1. The support leg 104 can provide stable support for the reactor shell 1.

[0037] Working principle:

[0038] Wastewater inflow: The wastewater to be treated enters the reactor from the inlet pipe 101 at the bottom of the reactor shell 1 through the inlet pump.

[0039] Sulfur autotrophic denitrification reaction: Inside the reactor, the sulfur-based fiber carrier 3, fixedly connected to the lower side of the packing support 2, plays a crucial role. A biofilm is attached to the surface of the sulfur-based fiber carrier 3, on which sulfur autotrophic denitrifying bacteria grow. These bacteria use elemental sulfur or other reduced sulfides provided by the sulfur-based fiber carrier 3 as electron donors. Nitrates in the wastewater act as reactants, undergoing denitrification in an anaerobic environment under the action of the sulfur autotrophic denitrifying bacteria, and are reduced to nitrogen gas. This process removes nitrogen pollutants from the wastewater, achieving the goal of wastewater purification.

[0040] Vibration Assistance: To ensure the efficient and stable operation of the reactor, the vibration mechanism installed at the upper end of the packing support 2 is activated. The vibration motor 4 is mounted on a motor base 401, which is fixed to the top of a mounting base 5, which is detachably mounted on the upper end of the packing support 2. When the vibration motor 4 starts, the generated vibration is transmitted to the packing support 2 through the mounting base 5, thereby causing the sulfur-based fiber carrier 3 to vibrate. This vibration has the following effects:

[0041] Preventing excessive biofilm accumulation: Avoiding the continuous reproduction and accumulation of microorganisms on the surface of sulfur-based fiber carrier 3, which would lead to smaller gaps or even caking between the packing materials, thus ensuring that sewage can flow smoothly between the packing materials and fully contact the biofilm.

[0042] Improving mass transfer efficiency: Vibration makes the contact between wastewater and biofilm more thorough and frequent, enhances the mass transfer process between pollutants (such as nitrate) and microorganisms in wastewater, promotes denitrification, and improves nitrogen removal efficiency.

[0043] Eliminating the influence of gases: Nitrogen gas produced during denitrification can accumulate in the voids between packing materials, affecting mass transfer. Vibration can help expel the accumulated nitrogen gas in a timely manner, preventing its adverse effects on the reaction.

[0044] Vibration damping and sealing: When the vibration mechanism is working, the rubber damping pad 6 between the bottom of the mounting base 5 and the top of the top cover 103 plays a damping role, reducing the impact of vibration on the reactor shell 1 and the external environment, and reducing noise. At the same time, the elastic sealing ring 1032 in the first assembly hole 1031 is slidably fitted on the packing support 2, ensuring the sealing of the reactor, preventing sewage leakage and the entry of outside air, maintaining the anaerobic environment inside the reactor, which is conducive to the growth of denitrifying bacteria and the reaction.

[0045] Wastewater discharge after treatment: After the sulfur autotrophic denitrification treatment, the nitrogen pollutants in the wastewater have been effectively removed. The purified water that meets certain standards flows out of the reactor naturally from the outlet pipe 102 at the top of the reactor shell 1, completing the entire wastewater treatment process.

[0046] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A vibrating bed sulfur autotrophic denitrification bioreactor, characterized in that, The reactor includes a reactor shell (1) and a packing support (2). The bottom of the reactor shell (1) is connected to an inlet pipe (101), and the top end of the reactor shell (1) is connected to an outlet pipe (102). A top cover (103) is fixedly installed on the top of the reactor shell (1) by bolts. The packing support (2) is located inside the reactor shell (1). A sulfur-based fiber carrier (3) is fixedly connected to the lower side of the packing support (2). A first assembly hole (1031) is provided on the top cover (103). The upper end of the packing support (2) extends from the first assembly hole (1031) to the outside of the reactor shell (1). A vibration mechanism capable of driving the sulfur-based fiber carrier (3) on the packing support (2) to vibrate is provided on the upper end of the packing support (2). The vibration mechanism includes a mounting base (5), which is detachably mounted on the upper end of the packing support (2). A motor base (401) is fixedly mounted on the top of the mounting base (5), and a vibration motor (4) is fixedly mounted on the motor base (401). A rubber shock-absorbing pad (6) is fixedly mounted between the bottom of the mounting base (5) and the top of the top cover (103).

2. The vibrating bed sulfur autotrophic denitrification bioreactor according to claim 1, characterized in that: An elastic sealing ring (1032) is fixedly installed inside the first assembly hole (1031), and the elastic sealing ring (1032) is slidably sleeved on the packing bracket (2).

3. The vibrating bed sulfur autotrophic denitrification bioreactor according to claim 1, characterized in that: It also includes an assembly bolt (504), and the top of the mounting base (5) is provided with a second assembly hole (501). The mounting base (5) is sleeved on the packing bracket (2) through the second assembly hole (501). The upper end of the packing bracket (2) is provided with a threaded hole (201). The top of the second assembly hole (501) is fixedly connected to a connecting block (502). The connecting block (502) is provided with a third assembly hole (503). One end of the assembly bolt (504) passes through the connecting block (502) and is threadedly fixedly connected to the threaded hole (201).

4. A vibrating bed sulfur autotrophic denitrification bioreactor according to claims 1-3, characterized in that: The lower end of the reactor shell (1) is fixedly equipped with a support leg (104).

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