Sewage treatment equipment based on microbial fuel cell

Abstract

The invention belongs to the technical field of sewage treatment, and discloses sewage treatment equipment based on a microbial fuel cell, which comprises an anode chamber, a monitoring assembly arranged in the anode chamber, and a cleaning and stirring assembly fixedly arranged on one side of the monitoring assembly, according to the device, gas generated in the metabolism process of microorganisms is ingeniously used as a power source, sewage is effectively stirred, sedimentation of organic matter is prevented, high efficiency of sewage treatment is kept, meanwhile, the device has the function of automatically cleaning a biological membrane on the anode plate, the problem of biological membrane blockage is effectively solved, and the service life of the device is prolonged. The stability of the treatment efficiency is ensured; according to the device, a simple mechanical structure design is adopted, a traditional sensor is replaced, and the completion condition of the sewage treatment process is judged by monitoring the amount of gas generated by microorganisms, so that the automation level of equipment is remarkably improved, and the practicability and economical efficiency of the equipment are enhanced while the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to sewage treatment equipment based on microbial fuel cells. Background Art

[0002] As a new type of sewage treatment technology, microbial fuel cells use anaerobic microorganisms to oxidize and decompose organic matter in sewage into small molecules such as carbon dioxide and methane, while generating electricity. This can achieve the dual effects of sewage treatment and energy recovery, but there are still some technical defects: 1. The biofilm on the anode plate is easily blocked, resulting in reduced treatment efficiency of the microbial fuel cell; 2. Organic matter in sewage is easy to deposit, affecting the operation of microbial fuel cells; 3. The existing microbial fuel cell wastewater treatment equipment has a low degree of automation and is relatively complex to operate and maintain.

[0003] Therefore, there is a need for a wastewater treatment device based on microbial fuel cells that can clean the anode plates, prevent organic matter deposition and has a high degree of automation to solve these technical defects. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the device cleverly uses the gas produced by microorganisms in the metabolic process as a power source to effectively stir the sewage and prevent the sedimentation of organic matter, thereby maintaining the high efficiency of sewage treatment. At the same time, the device has the function of automatically cleaning the biofilm on the anode plate, effectively avoiding the problem of biofilm clogging and ensuring the stability of treatment efficiency. The device adopts a simple mechanical structure design to replace the traditional sensor, and judges the completion of the sewage treatment process by monitoring the amount of gas produced by microorganisms. This innovation not only significantly improves the automation level of the equipment, but also reduces costs while enhancing the practicability and economy of the equipment.

[0005] The technical solution adopted by the present invention is as follows: a sewage treatment device based on a microbial fuel cell, comprising an anode chamber, an anode plate fixedly arranged on the inner wall of the anode chamber, a solenoid valve 1 fixedly arranged on the inner wall of the anode chamber and used as a place for microorganisms to attach and generate electricity, a solenoid valve 2 fixedly arranged on the water inlet of the anode chamber and a solenoid valve 3 fixedly arranged on the water outlet of the anode chamber, a monitoring component arranged inside the anode chamber and used to monitor the sewage treatment process, and a cleaning and stirring component fixedly arranged on one side of the monitoring component and used to clean the anode plate and stir the sewage; The monitoring assembly includes a flow monitoring unit and a water level monitoring unit, wherein the flow monitoring unit is fixedly arranged on the inner wall of the anode chamber, and the water level monitoring unit is fixedly arranged on the bottom inner wall of the anode chamber; The cleaning and stirring assembly includes a cleaning unit and a stirring unit. The stirring unit is fixedly arranged on one side of the flow monitoring unit, the cleaning unit is fixedly arranged on one side of the stirring unit, the cleaning unit is transmission-connected to the stirring unit, and the cleaning unit is pipeline-connected to the flow monitoring unit.

[0006] As a preferred technical solution of the present scheme, the flow monitoring unit includes a support frame fixed on the inner wall of the anode chamber, a pneumatic cylinder fixed on the top wall of the support frame, a slider slidably arranged inside the pneumatic cylinder, a switch slot opened on the inner wall of the pneumatic cylinder, a toggle rod rotatably arranged on the surface of the switch slot, a magnet fixed on the side wall of the switch slot, which is used to reset the toggle rod to ensure that the touch switch 1 can be stably triggered when the slider is reset, and a touch switch 1 fixed on the top wall of the switch slot. A spring is fixed between the lower wall of the slider and the bottom wall of the pneumatic cylinder for resetting the slider to assist in determining whether the sewage treatment is completed. The touch switch 1 is electrically controlled and connected to the solenoid valve 2.

[0007] As a preferred technical solution of the present scheme, the stirring unit includes an impeller cover fixed on the top wall of the support frame, a driving impeller rotatably arranged in the impeller cover, a gear 1 coaxially fixed on the top of the driving impeller shaft, and a stirring impeller coaxially fixed on the bottom of the driving impeller shaft, which is used to stir the sewage and prevent the deposition of organic matter, an air inlet pipe fixed on the side wall of the impeller cover and an air outlet pipe fixed on the side wall of the impeller cover, the other end of the air inlet pipe is fixed on the bottom side wall of the air pressure cylinder, and the other end of the air outlet pipe extends through the outer wall of the anode chamber.

[0008] As a preferred technical solution of this scheme, the cleaning unit includes a rotating rod rotatably arranged on the top wall of the support frame, a gear 2 coaxially fixed on the rotating rod, and an anode brush fixed on the surface of the rotating rod, and the gear 2 is meshingly connected with the gear 1.

[0009] As a preferred technical solution of the present scheme, the water level monitoring unit includes a limit frame fixed on the bottom inner wall of the anode chamber, which is used to limit the movement range of the float, a float movably arranged in the limit frame, a touch switch 2 fixed on the bottom inner wall of the limit frame, and a touch switch 3 fixed on the top inner wall of the limit frame. The top height of the limit frame is higher than the height of the anode plate, the top height of the limit frame is lower than the top height of the air pressure cylinder, and the top height of the limit frame is higher than the height of the connecting pipe.

[0010] As a preferred technical solution of this scheme, the touch switch 2 is electrically controlled and connected to the solenoid valve 2, the touch switch 2 is electrically controlled and connected to the solenoid valve 1, and the touch switch 3 is electrically controlled and connected to the solenoid valve 1.

[0011] As a preferred technical solution of this scheme, a cathode chamber is provided on one side of the anode chamber, a connecting tube is fixedly provided through the side wall of the anode chamber, the other end of the connecting tube is fixedly provided through the side wall of the cathode chamber, and a proton exchange membrane is provided inside the connecting tube.

[0012] After adopting the above structure, the beneficial effects of the present invention are as follows: 1. It does not rely on any external power source, but cleverly uses the gas naturally produced during microbial metabolism as a driving force to simultaneously activate the cleaning unit and the stirring unit. This design not only effectively stirs the sewage to prevent organic matter from depositing, but also realizes the automatic cleaning of the biofilm on the anode plate, thereby ensuring the efficiency and continuity of the sewage treatment process; 2. In view of the unique working principle of microbial fuel cells, this device adopts a simple mechanical structure to realize flow monitoring, such as air pressure cylinder, slider, touch switch, etc., replacing complex sensors. This design not only significantly improves the automation level of the equipment, but also greatly reduces the production cost, achieving a combination of performance and economy; 3. Through the flow monitoring unit and water level monitoring unit in the monitoring component and the electrical control connection with the solenoid valve, the automatic inlet and outlet of sewage and the automatic operation of the equipment are realized; 4. The design of this device does not require an additional power source, so that the generated electricity can be fully collected, thus achieving the dual benefits of resource recovery and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present solution and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention.

[0014] Figure 1 This is a schematic diagram of the overall structure of a sewage treatment device based on a microbial fuel cell according to the present invention; Figure 2 It is a cross-sectional view of the internal structure of the anode chamber in the present invention; Figure 3 It is a cross-sectional structural diagram of the flow monitoring unit in the present invention; Figure 4 for Figure 3 A magnified view of the local structure at point A in the middle; Figure 5 It is a schematic diagram of the connection structure of the cleaning unit and the stirring unit in the present invention; Figure 6 It is a cross-sectional structural diagram of the air outlet pipe and the impeller cover in the present invention; Figure 7 It is a schematic diagram of the connection structure of the water level monitoring unit in the present invention.

[0015] In the attached drawings: 1. anode chamber; 2. cathode chamber; 3. connecting pipe; 4. solenoid valve 1; 5. solenoid valve 2; 6. anode plate; 7. cleaning and stirring assembly; 8. monitoring assembly; 9. cleaning unit; 10. stirring unit; 11. flow monitoring unit; 12. water level monitoring unit; 13. support frame; 14. air pressure cylinder; 15. slider; 16. spring; 17. toggle rod; 18. magnet; 19. switch slot; 20. touch switch 1; 21. anode brush; 22. rotating rod; 23. gear 1; 24. gear 2; 25. air inlet pipe; 26. driving impeller; 27. impeller cover; 28. stirring impeller; 29. ​​air outlet pipe; 30. limit frame; 31. float; 32. touch switch 2; 33. touch switch 3. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0018] like Figure 1-Figure 7 As shown, Figure 1 As shown, the sewage treatment equipment based on microbial fuel cells of this embodiment includes an anode chamber 1, an anode plate 6 fixedly arranged on the inner wall of the anode chamber 1, an electromagnetic valve 1 4 fixedly arranged on the water inlet of the anode chamber 1, and an electromagnetic valve 2 5 fixedly arranged on the water outlet of the anode chamber 1, and also includes a monitoring component 8 arranged inside the anode chamber 1 and a cleaning and stirring component 7 fixedly arranged on one side of the monitoring component 8; The monitoring assembly 8 includes a flow monitoring unit 11 and a water level monitoring unit 12. The flow monitoring unit 11 is fixedly arranged on the inner wall of the anode chamber 1, and the water level monitoring unit 12 is fixedly arranged on the bottom inner wall of the anode chamber 1. The cleaning and stirring assembly 7 includes a cleaning unit 9 and a stirring unit 10. The stirring unit 10 is fixed on one side of the flow monitoring unit 11, and the cleaning unit 9 is fixed on one side of the stirring unit 10. The cleaning unit 9 is transmission-connected to the stirring unit 10, and the cleaning unit 9 is pipeline-connected to the flow monitoring unit 11.

[0019] Among them, the flow monitoring unit 11 includes a support frame 13 fixed on the inner wall of the anode chamber 1, a pressure cylinder 14 fixed on the top wall of the support frame 13, a slider 15 slidably arranged inside the pressure cylinder 14, a switch slot 19 opened on the inner wall of the pressure cylinder 14, a toggle rod 17 rotatably arranged on the surface of the switch slot 19, a magnet 18 fixed on the side wall of the switch slot 19 and a touch switch 20 fixed on the inner top wall of the switch slot 19, a spring 16 is fixed between the lower wall of the slider 15 and the inner bottom wall of the pressure cylinder 14, and the touch switch 20 is electrically controlled and connected to the solenoid valve 2 5.

[0020] It should be noted that after sewage is injected into the anode chamber 1, the top of the air pressure cylinder 14 is always above the water surface, and the toggle rod 17 is made of permanent magnetic material.

[0021] Among them, the stirring unit 10 includes an impeller cover 27 fixed on the top wall of the support frame 13, a driving impeller 26 rotatably arranged in the impeller cover 27, a gear 23 coaxially fixed on the top of the rotating shaft of the driving impeller 26, a stirring impeller 28 coaxially fixed on the bottom of the rotating shaft of the driving impeller 26, an air inlet pipe 25 penetrating and fixed on the side wall of the impeller cover 27, and an air outlet pipe 29 penetrating and fixed on the side wall of the impeller cover 27, the other end of the air inlet pipe 25 penetrates and is fixed on the bottom side wall of the air pressure cylinder 14, and the other end of the air outlet pipe 29 penetrates and extends out of the outer wall of the anode chamber 1.

[0022] The cleaning unit 9 includes a rotating rod 22 rotatably mounted on the top wall of the support frame 13 , a gear 2 24 coaxially fixed on the rotating rod 22 , and an anode brush 21 fixed on the surface of the rotating rod 22 , and the gear 2 24 is meshedly connected with the gear 1 23 .

[0023] It should be noted that: the surface of the anode brush 21 has bristles, and the top of the bristles is at a short distance from the anode plate 6 to avoid removing the microorganisms on the surface of the anode plate 6 for power generation.

[0024] Among them, the water level monitoring unit 12 includes a limit frame 30 fixed on the bottom inner wall of the anode chamber 1, a float 31 movably arranged in the limit frame 30, a touch switch 2 32 fixed on the bottom inner wall of the limit frame 30, and a touch switch 3 33 fixed on the top inner wall of the limit frame 30. The top height of the limit frame 30 is higher than the height of the anode plate 6, the top height of the limit frame 30 is lower than the top height of the air pressure cylinder 14, and the top height of the limit frame 30 is higher than the height of the connecting pipe 3.

[0025] Among them, the touch switch 2 32 is electrically controlled and connected to the solenoid valve 2 5 , the touch switch 2 32 is electrically controlled and connected to the solenoid valve 1 4 , and the touch switch 3 33 is electrically controlled and connected to the solenoid valve 1 4 .

[0026] A cathode chamber 2 is disposed on one side of the anode chamber 1 , a connecting pipe 3 is fixedly disposed through the side wall of the anode chamber 1 , the other end of the connecting pipe 3 is fixedly disposed through the side wall of the cathode chamber 2 , and a proton exchange membrane is disposed inside the connecting pipe 3 .

[0027] When used specifically: at the beginning, the solenoid valve 1 4 is opened, and the solenoid valve 2 5 is closed, and sewage enters the inside of the anode chamber 1 from the water inlet of the anode chamber 1. The water level in the anode chamber 1 rises, driving the float 31 to move upward, and the float 31 rises to the touch switch 3 33 and contacts the touch switch 3 33. The touch switch 33 controls the solenoid valve 1 4 to close and stop injecting sewage. At this time, a temporary closed space is formed between the liquid surface and the inner wall at the top of the anode chamber 1. The microorganisms on the surface of the anode plate 6 use the organic matter in the sewage to carry out oxidation-reduction reactions, continuously generating gas, and the gas floats to the closed space. The air pressure in the closed space increases, and the gas pushes the slider 15 to slide downward. Since the toggle rod 17 is rotatable, it will not block the slider 15 from moving downward. After the slider 15 passes the connection between the air pressure cylinder 14 and the air inlet pipe 25, the gas can flow into the air inlet pipe 25. After the gas flows into the air inlet pipe 25, it blows and drives the impeller 26 to rotate, and then flows out of the anode chamber 1 from the air outlet pipe 29. The driving impeller 26 rotates and drives the stirring impeller 28 to rotate, stirring The impeller 28 rotates to stir the sewage, preventing the organic matter in the sewage from settling and affecting the sewage treatment efficiency. The impeller 26 is driven to rotate to drive the gear 1 23 to rotate. The rotation of the gear 1 23 drives the gear 2 24 to rotate slowly. The rotation of the gear 2 24 drives the rotating rod 22 to rotate and then drives the anode brush 21 to rotate. When the anode brush 21 passes the anode plate 6, it can sweep away the impurities on the surface of the anode plate 6 that have completed the reaction. After the chemical reaction of the organic matter in the sewage is completed, the amount of gas generated becomes smaller, and the air pressure between the liquid surface and the top inner wall of the anode chamber 1 is reduced. The slider 15 moves upward under the action of the spring 16. The slider 15 contacts the toggle rod 17 to make it rotate upward. The toggle rod 17 contacts the touch switch 1 20. The touch switch 1 20 controls the solenoid valve 2 5 to open and discharge the treated sewage. The liquid level drops and drives the float 31 to drop until it contacts the touch switch 2 32 on the bottom wall of the anode chamber 1. The touch switch 2 32 controls the solenoid valve 2 5 to close and the solenoid valve 1 4 to open to continue to treat the sewage.

[0028] In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creatively designing without departing from the purpose of the invention, they should all fall within the scope of protection of the invention.

Claims

1. A wastewater treatment device based on a microbial fuel cell, comprising an anode chamber (1), an anode plate (6) fixedly arranged on the inner wall of the anode chamber (1), a first solenoid valve (4) fixedly arranged on the water inlet of the anode chamber (1), and a second solenoid valve (5) fixedly arranged on the water outlet of the anode chamber (1), characterized in that: It also includes a monitoring component (8) arranged inside the anode chamber (1) and a cleaning and stirring component (7) fixedly arranged on one side of the monitoring component (8); The monitoring component (8) comprises a flow monitoring unit (11) and a water level monitoring unit (12), wherein the flow monitoring unit (11) is fixedly arranged on the inner wall of the anode chamber (1), and the water level monitoring unit (12) is fixedly arranged on the bottom inner wall of the anode chamber (1); The cleaning and stirring assembly (7) comprises a cleaning unit (9) and a stirring unit (10); the stirring unit (10) is fixedly arranged on one side of a flow monitoring unit (11); the cleaning unit (9) is fixedly arranged on one side of the stirring unit (10); the cleaning unit (9) is transmission-connected to the stirring unit (10); and the cleaning unit (9) is pipeline-connected to the flow monitoring unit (11).

2. The sewage treatment equipment based on microbial fuel cells according to claim 1 is characterized in that: The flow monitoring unit (11) comprises a support frame (13) fixedly mounted on the inner wall of the anode chamber (1), a pressure cylinder (14) fixedly mounted on the top wall of the support frame (13), a slider (15) slidably mounted inside the pressure cylinder (14), a switch slot (19) provided on the inner wall of the pressure cylinder (14), a toggle rod (17) rotatably mounted on the surface of the switch slot (19), a magnet (18) fixedly mounted on the side wall of the switch slot (19), and a touch switch (20) fixedly mounted on the inner top wall of the switch slot (19), a spring (16) fixedly mounted between the lower wall of the slider (15) and the inner bottom wall of the pressure cylinder (14), and the touch switch (20) is electrically controlled and connected to the electromagnetic valve (5).

3. A wastewater treatment device based on a microbial fuel cell according to claim 2, characterized in that: The stirring unit (10) comprises an impeller cover (27) fixedly mounted on the top wall of the support frame (13), a driving impeller (26) rotatably mounted in the impeller cover (27), a gear 1 (23) coaxially fixedly mounted on the top of the rotating shaft of the driving impeller (26), a stirring impeller (28) coaxially fixedly mounted on the bottom of the rotating shaft of the driving impeller (26), an air inlet pipe (25) penetrating and fixedly mounted on the side wall of the impeller cover (27), and an air outlet pipe (29) penetrating and fixedly mounted on the side wall of the impeller cover (27), wherein the other end of the air inlet pipe (25) penetrates and is fixedly mounted on the bottom side wall of the air pressure cylinder (14), and the other end of the air outlet pipe (29) penetrates and extends out of the outer wall of the anode chamber (1).

4. A wastewater treatment device based on a microbial fuel cell according to claim 3, characterized in that: The cleaning unit (9) comprises a rotating rod (22) rotatably mounted on the top wall of the support frame (13), a second gear (24) coaxially fixedly mounted on the rotating rod (22), and an anode brush (21) fixedly mounted on the surface of the rotating rod (22), wherein the second gear (24) is meshingly connected with the first gear (23).

5. The sewage treatment equipment based on microbial fuel cells according to claim 1 is characterized in that: The water level monitoring unit (12) comprises a limit frame (30) fixedly arranged on the bottom inner wall of the anode chamber (1), a floating ball (31) movably arranged in the limit frame (30), a second touch switch (32) fixedly arranged on the bottom inner wall of the limit frame (30), and a third touch switch (33) fixedly arranged on the top inner wall of the limit frame (30).

6. The sewage treatment equipment based on microbial fuel cells according to claim 5 is characterized in that: The touch switch 2 (32) is electrically controlled connected to the solenoid valve 2 (5), the touch switch 2 (32) is electrically controlled connected to the solenoid valve 1 (4), and the touch switch 3 (33) is electrically controlled connected to the solenoid valve 1 (4).

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