A sewage treatment device based on a microbial fuel cell

Abstract

The present invention belongs to the technical field of sewage treatment. A sewage treatment device based on a microbial fuel cell disclosed by the present invention includes an anode chamber, a monitoring component disposed inside the anode chamber, and a cleaning and stirring component fixedly arranged on one side of the monitoring component. This device cleverly utilizes the gas generated by microorganisms during metabolism as a power source to effectively stir the sewage, prevent the settlement of organic matter, thereby maintaining the high efficiency of sewage treatment. At the same time, this device has the function of automatically cleaning the biofilm on the anode plate, effectively avoiding the problem of biofilm blockage and ensuring the stability of the treatment efficiency. This 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 generated by microorganisms. This innovation not only significantly improves the automation level of the device, but also enhances the practicality and economy of the device while reducing costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment device based on a microbial fuel cell. Background Art

[0002] As a new type of sewage treatment technology, a microbial fuel cell uses anaerobic microorganisms to oxidize and decompose organic matter in sewage into small molecule substances such as carbon dioxide and methane, and at the same time generates electric energy, which can achieve the dual effects of recovering energy while treating sewage. However, there are still some technical defects:

[0003] 1. The biofilm on the anode plate is easily blocked, resulting in a reduction in the treatment efficiency of the microbial fuel cell;

[0004] 2. The organic matter in the sewage is easily deposited, affecting the operation effect of the microbial fuel cell;

[0005] 3. The existing sewage treatment equipment based on microbial fuel cells has a low degree of automation, and operation and maintenance are relatively complex.

[0006] Therefore, a sewage treatment device based on a microbial fuel cell that can clean the anode plate, prevent the deposition of organic matter, and has a high degree of automation is needed to solve these technical defects. Summary of the Invention

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present device cleverly uses the gas generated by microorganisms during metabolism as a power source to effectively stir the sewage, prevent the settlement 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 blockage and ensuring the stability of the treatment efficiency; the device adopts a simple mechanical structure design, replacing the traditional sensor, and judges the completion of the sewage treatment process by monitoring the amount of gas generated by microorganisms. This innovation not only significantly improves the automation level of the equipment, but also enhances the practicality and economy of the equipment while reducing costs.

[0008] The technical solution adopted by the present invention is as follows: A sewage treatment device based on a microbial fuel cell includes an anode chamber, an anode plate fixedly arranged on the inner wall of the anode chamber, which is fixed on the inner wall of the anode chamber and serves as a place for microorganisms to attach and generate electric energy, a solenoid valve 1 fixedly arranged at the water inlet of the anode chamber, and a solenoid valve 2 fixedly arranged at the water outlet of the anode chamber. It also includes a monitoring component arranged inside the anode chamber for monitoring the sewage treatment process, and a cleaning and stirring component fixedly arranged on one side of the monitoring component for cleaning the anode plate and stirring the sewage;

[0009] The monitoring component includes a flow monitoring unit and a water level monitoring unit. 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;

[0010] The cleaning and stirring component 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 in transmission connection with the stirring unit, and the cleaning unit is connected to the flow monitoring unit through a pipeline.

[0011] As a preferred technical solution of this scheme, the flow monitoring unit includes a support frame fixedly arranged on the inner wall of the anode chamber, a pneumatic cylinder fixedly arranged on the top wall of the support frame, a slider slidably arranged inside the pneumatic cylinder, a switch groove opened on the inner wall of the pneumatic cylinder, a toggle rod rotatably arranged on the surface of the switch groove, a magnet fixedly arranged on the side wall of the switch groove for resetting the toggle rod to ensure that the slider can stably trigger the touch switch one when reset, and a touch switch one fixedly arranged on the inner top wall of the switch groove. A spring is fixedly arranged between the lower wall of the slider and the inner bottom wall of the pneumatic cylinder for resetting the slider to assist in judging whether the sewage treatment is completed. The touch switch one is electrically controlled and connected to the solenoid valve two.

[0012] As a preferred technical solution of this scheme, the stirring unit includes an impeller cover fixedly arranged on the top wall of the support frame, a driving impeller rotatably arranged inside the impeller cover, a gear one coaxially fixedly arranged on the top of the rotating shaft of the driving impeller, and a stirring impeller coaxially fixedly arranged on the bottom of the rotating shaft of the driving impeller for stirring sewage to prevent organic matter deposition. An air inlet pipe fixedly arranged through the side wall of the impeller cover and an air outlet pipe fixedly arranged through the side wall of the impeller cover. The other end of the air inlet pipe is fixedly arranged through the side wall of the bottom of the pneumatic cylinder, and the other end of the air outlet pipe penetrates and extends out of the outer wall of the anode chamber.

[0013] 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 two coaxially fixedly arranged on the rotating rod, and an anode brush fixedly arranged on the surface of the rotating rod. The gear two is meshed and connected with the gear one.

[0014] As a preferred technical solution of this scheme, the water level monitoring unit includes a limiting frame fixedly arranged on the bottom inner wall of the anode chamber for limiting the movement range of the floating ball, a floating ball movably arranged inside the limiting frame, a touch switch two fixedly arranged on the bottom inner wall of the limiting frame, and a touch switch three fixedly arranged on the top inner wall of the limiting frame. The top height of the limiting frame is higher than the height of the anode plate, the top height of the limiting frame is lower than the top height of the pneumatic cylinder, and the top height of the limiting frame is higher than the height of the connecting pipe.

[0015] As a preferred technical solution of this scheme, the touch switch two is electrically and controllably connected to the solenoid valve two, the touch switch two is electrically and controllably connected to the solenoid valve one, and the touch switch three is electrically and controllably connected to the solenoid valve one.

[0016] As a preferred technical solution of this scheme, a cathode chamber is provided on one side of the anode chamber. A communication pipe is fixedly provided through the side wall of the anode chamber, and the other end of the communication pipe is fixedly provided through the side wall of the cathode chamber. A proton exchange membrane is provided inside the communication pipe.

[0017] After adopting the above structure, the beneficial effects of the present invention are as follows:

[0018] 1. It does not rely on any external power source, but cleverly uses the gas naturally generated during the microbial metabolism process as the driving force to synchronously activate the cleaning unit and the stirring unit. This design not only effectively stirs the sewage to prevent the deposition of organic matter, but also realizes the automatic cleaning of the biofilm on the anode plate, thus ensuring the high efficiency and continuity of the sewage treatment process;

[0019] 2. Aiming at the unique working principle of the microbial fuel cell, this device adopts a simple mechanical structure to realize flow monitoring, such as a pneumatic cylinder, a slider, a 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 the combination of performance and economy;

[0020] 3. Through the flow monitoring unit and the water level monitoring unit in the monitoring component, and the electrical and controllable connection with the solenoid valve, the automatic inflow and outflow of sewage and the automatic operation of the equipment are realized;

[0021] 4. The design of this device does not require an additional power source, enabling the generated electric energy to be fully collected, thus realizing the dual benefits of resource recovery and environmental protection. Description of the Drawings

[0022] The drawings are used to provide a further understanding of this scheme, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention.

[0023] Figure 1 It is a schematic diagram of the overall structure of a sewage treatment device based on a microbial fuel cell of the present invention;

[0024] Figure 2 It is a cross-sectional view of the internal structure of the anode chamber in the present invention;

[0025] Figure 3 It is a cross-sectional view of the structure of the flow monitoring unit in the present invention;

[0026] Figure 4 For Figure 3Enlarged view of the local structure at A in the [device / component name];

[0027] Figure 5 Schematic diagram of the connection structure between the cleaning unit and the stirring unit in the present invention;

[0028] Figure 6 Cross-sectional structure diagram of the air outlet pipe and the impeller cover in the present invention;

[0029] Figure 7 Schematic diagram of the connection structure of the water level monitoring unit in the present invention.

[0030] 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. Pressure cylinder; 15. Slide block; 16. Spring; 17. Poking rod; 18. Magnet; 19. Switch groove; 20. Touch switch 1; 21. Anode brush; 22. Rotating rod; 23. Gear 1; 24. Gear 2; 25. Intake pipe; 26. Driving impeller; 27. Impeller cover; 28. Stirring impeller; 29. Air outlet pipe; 30. Limiting frame; 31. Floating ball; 32. Touch switch 2; 33. Touch switch 3. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] It should be noted that in this article, relational terms such as first and second are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0033] As Figures 1 - 7 shown, as Figure 1As shown in the figure, the sewage treatment device based on a microbial fuel cell in this embodiment includes an anode chamber 1, an anode plate 6 fixedly arranged on the inner wall of the anode chamber 1, a solenoid valve 4 fixedly arranged at the water inlet of the anode chamber 1, and a solenoid valve 5 fixedly arranged at the water outlet of the anode chamber 1. It further 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;

[0034] The monitoring component 8 includes a flow rate monitoring unit 11 and a water level monitoring unit 12. The flow rate 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;

[0035] The cleaning and stirring component 7 includes a cleaning unit 9 and a stirring unit 10. The stirring unit 10 is fixedly arranged on one side of the flow rate monitoring unit 11, the cleaning unit 9 is fixedly arranged on one side of the stirring unit 10, the cleaning unit 9 is in transmission connection with the stirring unit 10, and the cleaning unit 9 is connected to the flow rate monitoring unit 11 through a pipeline.

[0036] Among them, the flow rate monitoring unit 11 includes a support frame 13 fixedly arranged on the inner wall of the anode chamber 1, a pneumatic cylinder 14 fixedly arranged on the top wall of the support frame 13, a slider 15 slidably arranged inside the pneumatic cylinder 14, a switch groove 19 opened on the inner wall of the pneumatic cylinder 14, a toggle lever 17 rotatably arranged on the surface of the switch groove 19, a magnet 18 fixedly arranged on the side wall of the switch groove 19, and a touch switch 20 fixedly arranged on the inner top wall of the switch groove 19. A spring 16 is fixedly arranged between the lower wall of the slider 15 and the inner bottom wall of the pneumatic cylinder 14, and the touch switch 20 is electrically controlled and connected to the solenoid valve 5.

[0037] It should be noted that: after sewage is injected into the anode chamber 1, the top of the pneumatic cylinder 14 is always higher than the water surface, and the material of the toggle lever 17 is a permanent magnetic material.

[0038] Among them, the stirring unit 10 includes an impeller cover 27 fixedly arranged on the top wall of the support frame 13, a driving impeller 26 rotatably arranged inside 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 fixedly arranged through the side wall of the impeller cover 27, and an air outlet pipe 29 fixedly arranged through the side wall of the impeller cover 27. The other end of the air inlet pipe 25 is fixedly arranged through the bottom side wall of the pneumatic 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.

[0039] Among them, the cleaning unit 9 includes a rotating rod 22 rotatably arranged on the top wall of the support frame 13, a gear 24 coaxially fixed on the rotating rod 22, and an anode brush 21 fixed on the surface of the rotating rod 22. The gear 24 is meshed with the gear 23.

[0040] It should be noted that: there are bristles on the surface of the anode brush 21, and the top ends of the bristles are at a short distance from the anode plate 6 to avoid removing the microorganisms used for power generation on the surface of the anode plate 6.

[0041] Among them, the water level monitoring unit 12 includes a limit frame 30 fixedly arranged on the inner wall of the bottom of the anode chamber 1, a floating ball 31 movably arranged in the limit frame 30, a touch switch two 32 fixedly arranged on the inner wall of the bottom of the limit frame 30, and a touch switch three 33 fixedly arranged on the inner wall of the top of the limit frame 30. The top end height of the limit frame 30 is higher than the height of the anode plate 6, the top end height of the limit frame 30 is lower than the top end height of the air pressure cylinder 14, and the top end height of the limit frame 30 is higher than the height of the connecting pipe 3.

[0042] Among them, the touch switch two 32 is electrically controlled and connected to the solenoid valve two 5, the touch switch two 32 is electrically controlled and connected to the solenoid valve one 4, and the touch switch three 33 is electrically controlled and connected to the solenoid valve one 4.

[0043] Among them, a cathode chamber 2 is arranged on one side of the anode chamber 1, a connecting pipe 3 is fixedly arranged through the side wall of the anode chamber 1, the other end of the connecting pipe 3 is fixedly arranged through the side wall of the cathode chamber 2, and a proton exchange membrane is arranged inside the connecting pipe 3.

[0044] During specific use: At the beginning, solenoid valve 4 is opened and solenoid valve 5 is closed. Sewage enters the interior 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 floating ball 31 to move upward. The floating ball 31 rises to touch the touch switch three 33 and comes into contact with the touch switch three 33. The touch switch three 33 controls the closing of solenoid valve 4 to stop injecting sewage. At this time, a temporary closed space is formed between the liquid level and the inner wall of the top of the anode chamber 1. Microorganisms on the surface of the anode plate 6 utilize the organic matter in the sewage to carry out oxidation-reduction reactions, continuously generating gas. The gas floats up to the closed space, increasing the air pressure in the closed space. The gas pushes the slider 15 to slide downward. Since the toggle rod 17 can rotate, it will not block the downward movement of the slider 15. After the slider 15 passes over the connection between the pneumatic cylinder 14 and the intake pipe 25, the gas can flow into the intake pipe 25. After the gas flows into the intake pipe 25, it blows the drive impeller 26 to rotate and then flows out of the anode chamber 1 from the outlet pipe 29. The rotation of the drive impeller 26 drives the rotation of the stirring impeller 28. The rotation of the stirring impeller 28 can stir the sewage to prevent the deposition of organic matter in the sewage from affecting the sewage treatment efficiency. The rotation of the drive impeller 26 drives the rotation of gear one 23. The rotation of gear one 23 drives the slow rotation of gear two 24. The rotation of gear two 24 drives the rotation of the rotating rod 22, which in turn drives the rotation of the anode brush 21. When the anode brush 21 passes through the anode plate 6, it can sweep away the impurities that have completed the reaction on the surface of the anode plate 6. 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 level and the inner wall of the top of the anode chamber 1 decreases. The slider 15 moves upward under the action of the spring 16. The slider 15 contacts the toggle rod 17 and causes it to rotate upward. The toggle rod 17 contacts the touch switch one 20. The touch switch one 20 controls the opening of solenoid valve 5 to discharge the treated sewage. The liquid level drops, driving the floating ball 31 to drop until it contacts the touch switch two 32 on the bottom wall of the anode chamber 1. The touch switch two 32 controls the closing of solenoid valve 5, and solenoid valve 4 is opened to continue treating the sewage.

[0045] In summary, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the present invention, design similar structural forms and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present 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 the 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); 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); 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); 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).

2. The sewage treatment equipment based on microbial fuel cells according to claim 1 is 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).

3. A wastewater treatment device based on a microbial fuel cell according to claim 2, 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).

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