A method and system for microbial electrolysis of hydrogen for ecological restoration

Abstract

The application discloses a kind of microbial electrolysis hydrogen production methods and systems for ecological restoration, including reaction pool, the side of the reaction pool is fixed with installation box, the inside of the reaction pool is equipped with cathode chamber and anode chamber, the inside of the installation box is equipped with lifting pump;The cathode chamber and the anode chamber are separated by exchange membrane, so that water body unidirectionally flows through anode electrode, and the organic matter in water body is oxidized and decomposed by power generation bacteria attached to the surface of anode electrode, the chemical oxygen demand in water body is reduced, and hydrogen ion and electron are generated simultaneously, hydrogen ion enters cathode chamber through exchange membrane, and electron enters cathode electrode through external circuit;In cathode chamber, chlorella receives hydrogen ion and electron as biological cathode, carries out sewage treatment, and further reduces the chemical oxygen demand in water body.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ecological restoration, and particularly relates to a method and system for microbial electrolysis of hydrogen for ecological restoration. BACKGROUND

[0002] The chemical oxygen demand in a water body is an important index for reflecting the ecological condition of the water body, and the chemical oxygen demand in the water body can be effectively reduced through microbial decomposition. In the prior art, discharge bacteria are used for decomposition, hydrogen ions are generated at the same time, and Chlorella is used for receiving the hydrogen ions and electrons to complete microbial electrolysis of hydrogen, which can effectively improve the chemical oxygen demand in the water body. However, the growth and breeding of Chlorella are difficult to control, resulting in high operation difficulty. SUMMARY

[0003] In order to solve the above problems existing in the prior art, the application aims to provide a method and system for microbial electrolysis of hydrogen for ecological restoration.

[0004] The technical scheme adopted by the application is as follows:

[0005] The method and system for microbial electrolysis of hydrogen for ecological restoration comprise a reaction tank, one side of the reaction tank is fixedly provided with a mounting box, the inside of the reaction tank is provided with a cathode chamber and an anode chamber, and the inside of the mounting box is provided with a lifting pump; the cathode chamber and the anode chamber are separated by an exchange film, the cathode chamber is provided with a cathode electrode, the anode chamber is provided with an anode electrode, one side of the cathode electrode is provided with a lamp tube, the lamp tube is detachably mounted on a mounting seat, the mounting seat is fixedly connected with the inner wall of one side of the reaction tank, and a brush ring is arranged on the lamp tube and connected with the lamp tube in a sliding mode.

[0006] As a preferred embodiment of the application, one side of the mounting box is fixedly provided with a water inlet pipe, the water inlet pipe is in communication with the anode chamber, the input end of the lifting pump is fixedly provided with a water suction pipe, the water suction pipe is in communication with the anode chamber, the output end of the lifting pump is fixedly provided with a lifting pipe, the lifting pipe is in communication with the cathode chamber, and one side of the cathode chamber away from the mounting box is fixedly provided with a water outlet pipe.

[0007] As a preferred embodiment of the application, one side of the reaction tank is fixedly provided with a sealing plate, the middle of the sealing plate is hollow, the hollow part of the sealing plate is provided with a mounting groove, the mounting groove is used for mounting a light-transmitting glass cover plate, the lamp tube is located in the center of the hollow part of the sealing plate, one gas collecting tank is arranged on each side of the lamp tube, the two gas collecting tanks are fixedly connected with the sealing plate respectively, and the two gas collecting tanks are in communication with the cathode chamber respectively.

[0008] As the preferred form of the present application, the anode chamber is provided with a plurality of anode electrodes, the cathode chamber is provided with two cathode electrodes, the two cathode electrodes are respectively located on the two sides of the lamp tube, and a control mechanism is arranged between the two cathode electrodes, which is used to control the sliding of the brush ring relative to the lamp tube.

[0009] As the preferred form of the present application, one side of the reaction tank is fixedly provided with a control box, the control box is provided with an external circuit, the external circuit is connected in series with the anode electrode and the cathode electrode, the anode electrode is a graphite fiber brush, the anode electrode is inoculated with electricity-producing bacteria, the cathode electrode is a platinum-loaded carbon cloth, and the cathode chamber is incubated with chlorella.

[0010] As the preferred form of the present application, the control mechanism comprises a screw rod, both ends of the screw rod are fixedly arranged on a fixed seat, the two fixed seats are fixedly connected with the two inner walls of the reaction tank, the screw rod is located between the lamp tube and the exchange membrane, a threaded sleeve is arranged on the screw rod, the threaded sleeve is threadedly connected with the screw rod, a connecting ring is fixedly arranged on the periphery of the threaded sleeve, a connecting rod is fixedly arranged on one end of the connecting ring close to the lamp tube, and the connecting rod is fixedly connected with the brush ring at the end away from the connecting ring.

[0011] As the preferred form of the present application, both ends of the threaded sleeve are respectively provided with a control sleeve, the end faces of the two control sleeves are rotatably connected with the end faces of the threaded sleeve, the two control sleeves are rotatably sleeved with the screw rod, two extension rods are fixedly arranged on the sides of the two control sleeves away from each other, one control cover is fixedly arranged on one end of each of the two extension rods away from each other, one floating cover is arranged on one end of each of the two control covers away from each other, the two control covers are hingedly connected with the two control covers, and the control cover and the floating cover are connected through a torsional spring.

[0012] As the preferred form of the present application, one-way bearings are arranged at both ends of the threaded sleeve, the two control sleeves are connected with the threaded sleeve through the one-way bearings, the two control covers are located on the upper sides of the two cathode electrodes, and the control box controls the two cathode electrodes to work alternately intermittently through the external circuit.

[0013] As the preferred form of the present application, one end of the riser pipe is fixedly provided with a water distribution pipe in the cathode chamber, a plurality of water distribution holes are arranged on the periphery of the water distribution pipe, and the input end and the output end of the cathode chamber and the anode chamber are respectively provided with one-way valve structures and filtering structures.

[0014] A method for microbial electrolysis of hydrogen for ecological restoration, comprising the following steps:

[0015] S1, inoculation and cultivation; inoculating electrogenic bacteria on the anode electrode and cultivating chlorella in the cathode chamber;

[0016] S2, anode chamber reaction; reducing the chemical oxygen demand in the water body by the microbial fuel cell technology through the electrogenic bacteria on the anode electrode;

[0017] S3, cathode chamber reaction; receiving hydrogen ions and electrons by chlorella as a biological cathode to further reduce the chemical oxygen demand in the water body;

[0018] S4, electrolytic hydrogen production; applying voltage to the anode electrode and the cathode electrode by the external circuit, and the hydrogen ions in the cathode chamber receive electrons to produce hydrogen gas, which is collected and temporarily stored by the gas collection tank;

[0019] S5, alternating self-cleaning; controlling the two cathode electrodes to work alternately by the control box, alternately generating hydrogen gas on both sides of the lamp tube, making the control mechanism reciprocate along the axial direction of the lamp tube, and periodically brushing the chlorella attached to the lamp tube by the brush ring.

[0020] The beneficial effects of the present application are: the present application is a method and system for ecological restoration of microbial electrolytic hydrogen production, which makes the water body flow through the anode electrode in one direction, oxidizes and decomposes the organic matter in the water body by the electrogenic bacteria attached to the surface of the anode electrode, reduces the chemical oxygen demand in the water body, and produces hydrogen ions and electrons, the hydrogen ions enter the cathode chamber through the exchange membrane, and the electrons enter the cathode electrode through the external circuit; in the cathode chamber, chlorella as a biological cathode receives hydrogen ions and electrons for sewage treatment, further reducing the chemical oxygen demand in the water body; and the present application sets a lamp tube in the cathode chamber to ensure the rapid growth of chlorella, and uses a brush ring to clean the lamp tube to ensure the growth of chlorella in an insufficient light environment; and the present application uses a control mechanism to cooperate with two alternately working cathode electrodes to automatically control the brush ring to reciprocate along the length direction of the lamp tube by using the upward force of hydrogen gas, reducing the operation difficulty and workload; the present application can control the frequency of pumping sewage into and out of the cathode chamber to avoid the flooding of chlorella, thereby reducing the number of times of opening the sealing plate for manual intervention of the amount of chlorella, and avoiding excessive disturbance to the water environment in the reaction tank. BRIEF DESCRIPTION OF DRAWINGS

[0021] The present application will be further described in detail below in combination with the drawings and specific implementation methods.

[0022] Figure 1 is a structural schematic diagram of the present application;

[0023] Figure 2 is a top view structural schematic diagram of the present application; Figure 1 ​

[0024] Figure 3 is the A-A direction (rotated 90°) structural diagram of the present application Figure 2

[0025] Figure 4 is the -B-B direction structural diagram of the present application Figure 2

[0026] Figure 5 is the installation box hidden rear structural diagram of the present application Figure 1

[0027] Figure 6 is the sealing plate hidden rear structural diagram of the present application Figure 6

[0028] Figure 7 is the control mechanism structural diagram of the present application Figure 6

[0029] Figure 8 is the partial structural explosion structural diagram of the present application Figure 7 DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application, that is, the described examples are only a part of the examples of the present application, but not all the examples. The components of the embodiments of the present application generally described and shown in the drawings can be arranged and designed in various different configurations.

[0031] Therefore, the detailed description of the embodiments of the present application provided in the drawings below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] The following description is provided in conjunction with the drawings and examples Figures 1-8 ​​​​​​The specific embodiment of the present application is a system for ecological restoration and microbial electrolysis hydrogen production, comprising a reaction tank 16, one side of the reaction tank 16 is fixedly provided with a mounting box 11, the inside of the reaction tank 16 is provided with a cathode chamber 26 and an anode chamber 27, the inside of the mounting box 11 is provided with a lifting pump 14; the cathode chamber 26 and the anode chamber 27 are separated by an exchange film 21, the cathode chamber 26 is provided with a cathode electrode 30, the anode chamber 27 is provided with an anode electrode 28, one side of the cathode electrode 30 is provided with a lamp tube 24, the lamp tube 24 is detachably mounted on a mounting seat 22, the mounting seat 22 is fixedly connected with the inner wall of one side of the reaction tank 16, the lamp tube 24 is provided with a brush ring 38, and the brush ring 38 is slidably connected with the lamp tube 24. Make the water body unidirectionally flow through the anode electrode 28, the electricity-producing bacteria attached to the surface of the anode electrode 28 oxidize and decompose the organic matter in the water body, reduce the chemical oxygen demand in the water body, and at the same time produce hydrogen ions and electrons, wherein the hydrogen ions enter the cathode chamber 26 through the exchange film 21, and the electrons enter the cathode electrode 30 through an external circuit; in the cathode chamber 26, chlorella receives hydrogen ions and electrons as a biological cathode to treat sewage and further reduce the chemical oxygen demand in the water body, the lamp tube 24 is arranged in the cathode chamber 26 to ensure the rapid growth of chlorella, and the brush ring 38 is used to clean the lamp tube 24 to further ensure the growth of chlorella in an environment with insufficient light.

[0033] Beneficially, one side of the mounting box 11 is fixedly provided with a water inlet pipe 15, the water inlet pipe 15 communicates with the anode chamber 27, the input end of the lifting pump 14 is fixedly provided with a water suction pipe 12, the water suction pipe 12 communicates with the anode chamber 27, the output end of the lifting pump 14 is fixedly provided with a lifting pipe 13, the lifting pipe 13 communicates with the cathode chamber 26, and one side of the cathode chamber 26 away from the mounting box 11 is fixedly provided with a water outlet pipe 23. The inlet and outlet of the anode chamber 27 are at the same side of the anode chamber 27, and a partition plate can be arranged in the anode chamber 27 to guide the inside of the anode chamber 27 into an "S" type channel, so as to ensure that the water body unidirectionally passes through the anode electrode 28 of the anode chamber 27.

[0034] Beneficially, one side of the reaction tank 16 is fixedly provided with an enclosing plate 19, the middle of the enclosing plate 19 is hollowed out, the hollow part of the enclosing plate 19 is provided with a mounting groove 17, the mounting groove 17 is used for mounting a light-transmitting glass cover plate, the lamp tube 24 is located in the center of the hollow part of the enclosing plate 19, and one gas collecting tank 18 is arranged on each side of the lamp tube 24, the two gas collecting tanks 18 are fixedly connected with the enclosing plate 19 respectively, and the two gas collecting tanks 18 respectively communicate with the cathode chamber 26. The light-transmitting glass cover plate in the hollow part of the enclosing plate 19 can be used to observe the growth of chlorella in the cathode chamber 26, and the number of chlorella can be artificially intervened by opening the enclosing plate 19.

[0035] Beneficially, a plurality of anode electrodes 28 are provided in the anode chamber 27, two cathode electrodes 30 are provided in the cathode chamber 26, the two cathode electrodes 30 are respectively located on both sides of the lamp 24, and a control mechanism 20 is provided between the two cathode electrodes 30, the control mechanism 20 is used to control the sliding of the brush ring 38 relative to the lamp 24. The two cathode electrodes 30 can be alternately and intermittently operated to ensure the service life of the cathode electrode 30, only one side of the cathode electrode 30 works at the same time, and the other side of the chlorella is not affected by the working of the cathode electrode 30, thereby avoiding the large number of chlorella in the cathode chamber 26 from being killed due to improper operation in a short time.

[0036] Beneficially, a control box 25 is fixed on one side of the reaction tank 16, an external circuit is provided in the control box 25, the external circuit is connected in series with the anode electrode 28 and the cathode electrode 30, the anode electrode 28 is a graphite fiber brush, the anode electrode 28 is inoculated with electricity-producing bacteria, the cathode electrode 30 is a platinum-loaded carbon cloth, and the cathode chamber 26 is cultivated with chlorella. The external circuit includes a power supply module, a voltage control module, a circuit protection module and a cathode electrode switching module, and a plurality of anode electrodes 28 are connected in parallel and then connected in series in the external circuit.

[0037] Beneficially, the control mechanism 20 includes a screw rod 31, both ends of the screw rod 31 are respectively fixed on a fixed seat 32, the two fixed seats 32 are respectively fixedly connected with the two inner walls of the reaction tank 16, the screw rod 31 is located between the lamp 24 and the exchange membrane 21, a threaded sleeve 40 is provided on the screw rod 31, the threaded sleeve 40 is threadedly connected with the screw rod 31, a connecting ring 33 is fixedly provided on the periphery of the threaded sleeve 40, a connecting rod 34 is fixedly provided on one end of the connecting ring 33 close to the lamp 24, and the other end of the connecting rod 34 away from the connecting ring 33 is fixedly connected with the brush ring 38. The threaded sleeve 40 moves along the axial direction of the screw rod 31 after rotating, thereby driving the brush ring 38 to move, and the movement of the threaded sleeve 40 relies on the continuous generation of hydrogen in the cathode chamber 26.

[0038] Beneficially, the two ends of the threaded sleeve 40 are respectively provided with a control sleeve 39, the end faces of the two control sleeves 39 are respectively rotationally connected with the end faces of the threaded sleeve 40, the two control sleeves 39 are respectively rotationally sleeved with the screw rod 31, the sides away from each other of the two control sleeves 39 are respectively fixedly provided with an extension rod 35, the ends away from each other of the two extension rods 35 are respectively fixedly provided with a control cover 36, the ends away from each other of the two control covers 36 are respectively provided with a floating cover 37, the two floating covers 37 are respectively hingedly connected with the two control covers 36, and the control cover 36 and the floating cover 37 are connected through a torsion spring. The floating cover 37 and the control cover 36 cooperatively form a reversed bowl structure, the bottom of which can accommodate a certain amount of gas, the gas can drive the bowl structure to float up, the bowl structure does not float up vertically during the floating up process, but rotates around the screw rod 31, and also has displacement in the horizontal direction, and the bottom of the bowl structure will gradually tilt after the bowl structure floats up, and the gas gathered at the bottom of the bowl structure can open the gap between the floating cover 37 and the control cover 36 after the bowl structure rotates by a small angle.

[0039] Beneficially, the two ends of the threaded sleeve 40 are respectively provided with a one-way bearing 41, the two control sleeves 39 are connected with the threaded sleeve 40 through the one-way bearing 41, the two control covers 36 are respectively located on the upper sides of the two cathode electrodes 30, and the control box 25 controls the two cathode electrodes 30 to work alternately and intermittently through an external circuit. The one-way bearing 41 enables the threaded sleeve 40 to move from one end of the screw rod 31, and the threaded sleeve 40 will not be stationary due to the reciprocating rotation of the control sleeve 39.

[0040] Beneficially, one end of the riser 13 fixedly provided in the cathode chamber 26 is provided with a water distribution pipe 29, the circumferential side of the water distribution pipe 29 is provided with a plurality of water distribution holes, and the input end and the output end of the cathode chamber 26 and the anode chamber 27 are respectively provided with a one-way valve structure and a filtering structure. The water distribution holes are inclined downward, so that the water entering the cathode chamber 26 has stable and slow flow rate, and does not interfere with the floating of hydrogen, and the one-way valve structure and the filtering structure ensure that the water entering and exiting the anode chamber 27 and the cathode chamber 26 will not be chaotic and reverse.

[0041] A method for microbial electrolysis of hydrogen for ecological restoration, comprising the following steps:

[0042] S1, inoculation and cultivation; inoculating electrogenic bacteria on the anode electrode 28 and cultivating chlorella in the cathode chamber 26;

[0043] S2, anode chamber reaction; reducing the chemical oxygen demand in the water body through the microbial fuel cell technology by using the electrogenic bacteria on the anode electrode 28;

[0044] S3, cathode chamber reaction; hydrogen ions and electrons are received by Chlorella as a biological cathode, further reducing the chemical oxygen demand in the water body;

[0045] S4, electrolytic hydrogen production; the external circuit is used to apply voltage to the anode electrode 28 and the cathode electrode 30, and the hydrogen ions in the cathode chamber 26 receive electrons to produce hydrogen gas, which is collected and temporarily stored by the gas collection tank 18;

[0046] S5, alternating self-cleaning; the control box 25 is used to control the two cathode electrodes 30 to work alternately, and the hydrogen gas on both sides of the lamp tube 24 is alternately generated, so that the control mechanism 20 reciprocates along the axial direction of the lamp tube 24, and the small ball algae attached to the lamp tube 24 are periodically brushed by the brush ring 38.

[0047] The working principle of the present application is as follows:

[0048] The external pump and the lifting pump 14 are used to make the water body unidirectionally flow through the plurality of anode electrodes 28 in the anode chamber 27, and the electrogenic bacteria attached to the surface of the anode electrode 28 oxidize and decompose the organic matter in the water body to generate hydrogen ions and electrons, wherein the hydrogen ions enter the cathode chamber 26 through the exchange membrane 21, and the electrons enter the cathode electrode 30 through the external circuit.

[0049] In the above process, the external pump pumps sewage into the anode chamber 27 through the water inlet pipe 15, and stops for a certain period of time after the sewage in the anode chamber 27 reaches a certain amount, so as to give the electrogenic bacteria sufficient time to oxidize and decompose the organic matter in the water body, and the products of oxidation and decomposition are periodically cleaned and collected, and the chemical oxygen demand of the water body after reaction is preliminarily reduced;

[0050] A part of the water body is pumped into the cathode chamber 26 by the lifting pump 14, and then the sewage is continuously pumped into the anode chamber 27 by the external pump, and the anode chamber 27 will continuously generate hydrogen ions and electrons; the water body entering the cathode chamber 26, Chlorella as a biological cathode receives hydrogen ions and electrons for sewage treatment, further reducing the chemical oxygen demand in the water body, and then part of the water body is pumped out through the water outlet pipe 23 by the external pump for subsequent detection, treatment and discharge.

[0051] In the cathode chamber 26, part of the Chlorella is consumed by pumping in and pumping out, and the consumed Chlorella is automatically supplemented by the nutrients in the lamp tube 24 and the water body, and the growth of Chlorella in the cathode chamber 26 is regularly observed through the light-transmitting glass cover plate on the sealing plate 19, and the number of Chlorella in the cathode chamber 26 is controlled within a suitable range by manual supplement or salvage, so as to ensure that there is sufficient Chlorella in the cathode chamber 26 for sewage treatment, and at the same time, the Chlorella in the cathode chamber 26 is prevented from overflowing.

[0052] In the cathode chamber 26, the Chlorella can be cultivated by natural light in the light environment, and the light tube 24 can be used to supplement light when the light is insufficient, so as to ensure the rapid growth of Chlorella. In this way, the situation that the Chlorella needs to be artificially supplemented in the cathode chamber 26 is greatly reduced. At this time, in order to avoid the Chlorella overflowing, the particle size allowed to pass through the filter screen at the water outlet pipe 23 can be controlled, or the frequency of pumping the sewage into and out of the cathode chamber 26 can be controlled to increase, so as to avoid the Chlorella overflowing, thereby reducing the number of times of opening the sealing plate 19 to manually intervene in the amount of Chlorella, reducing the operation difficulty and workload, and at the same time, the water body can be avoided from being frequently intervened, so that the water body environment is not controlled.

[0053] In addition, when the cathode chamber 26 generates hydrogen, the force of the hydrogen gas floating up will give power to the control mechanism 20, so as to control the sliding of the brush ring 38, and the self-cleaning of the light tube 24 is realized, so as to ensure the light supplementing effect of the light tube 24, and further ensure the rapid breeding of Chlorella.

[0054] Specifically, the external circuit is controlled by the control box 25, so that one of the cathode electrodes 30 works and the other cathode electrode 30 is idle. A large amount of hydrogen gas is generated from the surface of the working cathode electrode 30. The hydrogen gas floating up will touch the control cover 36 and the floating cover 37 at the corresponding position directly above. When a large amount of gas is gathered at the lower side of the space enclosed by the control cover 36 and the floating cover 37, the force of the gas floating up drives the control cover 36 and the floating cover 37 to move upward, the extension rod 35 moves together with the control cover 36, and the extension rod 35 drives the control sleeve 39 to rotate relative to the screw rod 31.

[0055] Under the action of the one-way bearing 41, when the extension rod 35 deflects upward, the control sleeve 39 drives the threaded sleeve 40 to rotate together. The threaded sleeve 40 and the screw rod 31 are threadedly matched, so that the threaded sleeve 40 moves along the axial direction of the one-way bearing 41. The brush ring 38 is driven to move by the connecting ring 33 and the connecting rod 34. The brush ring 38 moves along the axis of the light tube 24 to brush the Chlorella attached to the surface of the light tube 24.

[0056] When the gas gathered at the lower side of the space enclosed by the control cover 36 and the floating cover 37 increases to a certain amount, the torsional spring is not enough to ensure that the control cover 36 and the floating cover 37 remain closed. The force of the gas floating up will overcome the work of the torsional spring, so that the control cover 36 and the floating cover 37 are opened, and the gas escapes from between the control cover 36 and the floating cover 37 to continue floating up and is collected and temporarily stored in the gas collecting tank 18.

[0057] The control cover 36 and the floating cover 37 lose the support of the gas and slowly descend and reset to the closed state under the action of gravity. During this process, the extension rod 35 deflects downward, drives the control sleeve 39 to rotate relative to the screw rod 31, and the control sleeve 39 does not drive the threaded sleeve 40 to rotate under the action of the one-way bearing 41. The threaded sleeve 40 keeps its position unchanged.

[0058] In summary, during the working period of one side cathode electrode 30, the extension rod 35 deflects upward to drive the threaded sleeve 40 to move, and the extension rod 35 deflects downward to reset the threaded sleeve 40, thereby driving the brush ring 38 to gradually slide toward one end of the lamp tube 24;

[0059] When the brush ring 38 slides to one end of the lamp tube 24, the other cathode electrode 30 is controlled to work by the control box 25, and the extension rod 35 on the other side intermittently deflects to drive the brush ring 38 to slide reversely to the other end of the lamp tube 24, thereby completing a complete brushing cycle.

[0060] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] The above is only an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the structure of the present application or exceed the scope defined by the claims of the present application, which shall belong to the protection scope of the present application.

Claims

1. A system for ecological remediation of microbial electrolysis of hydrogen, characterized by: The utility model provides a kind of electrochemical reactor, including reaction pool, the one side of the reaction pool is equipped with installation box, the inside of the reaction pool is equipped with cathode chamber and anode chamber, the inside of the installation box is equipped with lifting pump;The cathode chamber and the anode chamber are separated by exchange membrane, the cathode electrode is equipped in the cathode chamber, the anode electrode is equipped in the anode chamber, the one side of the cathode electrode is equipped with lamp tube, the lamp tube is detachably mounted on mounting seat, the mounting seat is fixedly connected with the one side inner wall of the reaction pool, the lamp tube is equipped with brush ring, the brush ring is slidably connected with the lamp tube;The one side of the reaction pool is fixedly equipped with control box, the inside of the control box is equipped with external circuit, the external circuit is connected with the anode electrode and the cathode electrode; It also includes a control mechanism for controlling the sliding of the brush ring relative to the lamp tube;The control mechanism includes a screw rod, a threaded sleeve is provided on the screw rod, the threaded sleeve is threadedly engaged with the screw rod, a connecting ring is fixedly provided on the periphery of the threaded sleeve, a connecting rod is fixedly provided on the end of the connecting ring close to the lamp tube, and the end of the connecting rod away from the connecting ring is fixedly connected with the brush ring;Two control sleeves are respectively provided at the two ends of the threaded sleeve, and an extension rod is fixedly provided on the side of each control sleeve away from the other control sleeve;One control cover is fixedly provided on the end of each extension rod away from the other extension rod, and a floating cover is fixedly provided on the end of each control cover away from the other control cover;The control cover and the floating cover are hingedly connected with the two control sleeves respectively, and the control cover and the floating cover are connected by a torsion spring; One-way bearings are respectively provided at the two ends of the threaded sleeve, and the two control sleeves are connected with the threaded sleeve by the one-way bearings respectively;The control box controls the two cathode electrodes to work intermittently and alternately; The floating cover and the control cover cooperatively form a bowl-shaped structure with a reverse buckle, when a large amount of gas is gathered at the lower side of the structure, the upward floating force of the gas drives the control cover and the floating cover to move upward, under the action of the one-way bearings, the threaded sleeve moves along the axial direction of the one-way bearings, the connecting ring and the connecting rod drive the brush ring to move, and the brush ring moves along the axial direction of the lamp tube to brush the small chlorella attached to the surface of the lamp tube.

2. The microbial electrolysis hydrogen production system for ecological restoration according to claim 1, characterized in that: A water inlet pipe is fixedly provided on the side of the installation box, the water inlet pipe is communicated with the anode chamber, the input end of the lifting pump is fixedly provided with a water suction pipe, the water suction pipe is communicated with the anode chamber, the output end of the lifting pump is fixedly provided with a lifting pipe, and the lifting pipe is communicated with the cathode chamber.

3. The system for hydrogen production by microbial electrolysis for ecological restoration according to claim 2, characterized in that: A sealing plate is fixedly provided on the side of the reaction pool, the middle of the sealing plate is hollow, the hollow part of the sealing plate is provided with a mounting groove, the mounting groove is used for mounting a light-transmitting glass cover plate, the lamp tube is located in the center of the hollow part of the sealing plate, and a gas collection tank is provided on the side of the lamp tube, the gas collection tank is fixedly connected with the sealing plate, and the gas collection tank is communicated with the cathode chamber.

4. The microbial electrolysis hydrogen generation system for ecological restoration according to claim 2, characterized in that: The anode chamber is provided with a plurality of anode electrodes, the cathode chamber is provided with two cathode electrodes, and the two cathode electrodes are respectively located on the two sides of the lamp tube.

5. The system for hydrogen production by microbial electrolysis for ecological restoration according to claim 1, characterized in that: The anode electrode is a graphite fiber brush, the anode electrode is inoculated with electrogenic bacteria, the cathode electrode is a platinum-loaded carbon cloth, and the cathode chamber is cultivated with chlorella.

6. The microbial electrolysis hydrogen generation system for ecological restoration according to claim 5, characterized in that: The two ends of the screw rod are respectively fixedly arranged on a fixed seat, and the two fixed seats are respectively fixedly connected with the two inner walls of the reaction tank.

7. The system for hydrogen production by microbial electrolysis for ecological restoration according to claim 6, characterized in that it comprises: The end faces of the two control sleeves are respectively rotatably connected with the end faces of the threaded sleeves, and the two control sleeves are respectively rotatably sleeved with the screw rod.

8. The system for hydrogen production by microbial electrolysis for ecological restoration according to claim 2, characterized in that: One end of the riser is fixedly provided with a water distribution pipe in the cathode chamber, a plurality of water distribution holes are arranged on the side of the water distribution pipe, and the input end and the output end of the cathode chamber and the anode chamber are respectively provided with a one-way valve structure and a filter structure.

9. A method for microbial electrolysis of hydrogen for ecological restoration, using a system for microbial electrolysis of hydrogen for ecological restoration according to any one of claims 1-8, characterized in that, The method comprises the following steps: S1, inoculation and cultivation; electrogenic bacteria are inoculated on the anode electrode, and chlorella is cultivated in the cathode chamber; S2, anode chamber reaction; the electrogenic bacteria on the anode electrode are used to reduce the chemical oxygen demand in the water body through microbial fuel cell technology; S3, cathode chamber reaction; chlorella is used as a biological cathode to receive hydrogen ions and electrons, thereby further reducing the chemical oxygen demand in the water body; S4, electrolytic hydrogen production; the anode electrode and the cathode electrode are applied with voltage by using the external circuit, the hydrogen ions in the cathode chamber receive electrons to produce hydrogen gas, and the generated hydrogen gas is collected and temporarily stored by the gas collection tank; S5, alternating self-cleaning; the two cathode electrodes are controlled to work alternately by using the control box, the hydrogen gas on the two sides of the lamp tube is alternately generated, the control mechanism reciprocates along the axial direction of the lamp tube, and the chlorella attached to the periphery of the lamp tube is periodically brushed by the brush ring.

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