Construction methods and equipment for microbial fuel cell remediation of fishpond sludge

Abstract

The application relates to a fish pond sludge microbial fuel cell repairing construction method and a construction equipment, relates to the field of fish pond sludge disposal, customizes honeycomb cells and support cells with conductive characteristics, positions the honeycomb cells and the support cells by using a template, and the support cells are used as microbial fuel cell anodes; the sludge is softened by using mechanical stirring, the honeycomb cells and the support cells are positioned in the softened sludge by penetrating the honeycomb cells and the support cells into the sludge through the template; the template is taken out, and the honeycomb cells and the support cells are left in the sludge; a microbial fuel cell cathode is installed on the fish pond, the microbial fuel cell cathode, the microbial fuel cell anode and a power supply are connected through wires, a microbial fuel cell device is formed, and sludge organic matters are monitored regularly. Through the microbial fuel cell device, the activity of electricity-producing microorganisms in the sludge is driven, the active microorganisms promote the reaction of microorganisms and organic pollutants in the sludge, and thus the self-purification process of the sludge is achieved.

Description

Technical Field

[0001] This application relates to the field of fishpond sludge treatment, and in particular to the construction method and equipment for the microbial dye battery remediation of fishpond sludge. Background Technology

[0002] The fishery-solar hybrid project improves the overall land use efficiency by combining fisheries and photovoltaics. Fishpond silt remediation is an essential step before the project's construction. Traditional silt treatment methods tend to involve ex-situ treatment, where the silt is dredged and excavated, then quickly solidified with a solidifying agent and used as fill material. Directly excavating the silt from the fishpond can easily damage the ecological structure of the pond bottom and needs improvement. Summary of the Invention

[0003] In order to reduce the damage to the ecological structure of fishpond bottom caused by fishpond silt remediation, this application provides a construction method and equipment for fishpond silt microbial fuel cell remediation.

[0004] The first aspect is the construction method for repairing fishpond sludge into microbial fuel cells, which includes the following steps:

[0005] S1. Customized honeycomb cells and conductive support cells are used to position the honeycomb cells and support cells using templates. The support cells serve as the anode of the microbial fuel cell.

[0006] S2. Use mechanical stirring to soften the sludge, and use templates to insert honeycomb cells and support cells into the softened sludge for positioning.

[0007] S3. Remove the template, leaving the honeycomb cells and support cells in the silt;

[0008] S4. Install the microbial fuel cell cathode (3) on the fishpond, and connect the microbial fuel cell cathode (3), the microbial fuel cell anode and the power source through wires to form a microbial fuel cell device;

[0009] S5. Regularly monitor the organic matter in the sludge.

[0010] By adopting the above technical solution, the anode of the microbial fuel cell is fixed in the sludge pond through a honeycomb grid, and the anode and cathode of the microbial fuel cell are connected on the fishpond to form a microbial fuel cell device. This stimulates the activity of electrogenic microorganisms in the sludge, and the active microorganisms promote the reaction between the microorganisms and organic pollutants in the sludge, thereby achieving the self-purification process of the sludge and reducing the damage to the bottom ecological structure of the fishpond caused by the treatment of fishpond sludge.

[0011] Preferably, the silt is softened mechanically while the gravel and debris in the silt are removed.

[0012] By adopting the above technical solution, the honeycomb cells and support cells can penetrate into the bottom of the silt, which helps to keep the end face of the honeycomb cells flat after the honeycomb cells and support cells are installed.

[0013] Preferably, exogenous purifying bacteria are introduced into the fishpond.

[0014] By adopting the above technical solution, the biological enzymes produced during the rapid reproduction of exogenous purifying bacteria are used to oxidize black and odorous sediment and water, thereby accelerating the removal of pollutants from the sludge.

[0015] Preferably, the microbial fuel cell is connected to an external energy storage device and a light-emitting device.

[0016] By adopting the above technical solution, the device is connected to an external energy storage device and a light-emitting device to store the generated electrical energy for lighting.

[0017] Preferably, a support rod is installed around the fishpond, and a nylon rope is connected to the support rod. The nylon rope is connected to the microbial fuel cathode, so that the microbial fuel cathode floats on the water surface.

[0018] By adopting the above technical solution, the height of the microbial fuel cell cathode can be adjusted by adjusting the length of the nylon rope between the support rod and the cathode of the microbial fuel cell, making the microbial fuel cell suitable for different water levels.

[0019] Preferably, a float is installed on the microbial fuel cathode.

[0020] By adopting the above technical solution, when rainy weather occurs and the water level in the fishpond rises, the cathode of the microbial fuel cell can be kept floating on the water surface by setting up a floating plate, which prevents the microbial fuel cell cathode from being submerged when the water level in the fishpond rises.

[0021] Preferably, after the honeycomb cell penetrates the silt, the height of the honeycomb cell is 1-2 cm higher than the silt.

[0022] By adopting the above technical solution, the sludge in the honeycomb cell is less likely to be washed away and suspended in the honeycomb cell, thus reducing the risk of secondary pollution.

[0023] On the other hand, this application also provides a construction device for the remediation of microbial fuel cells in fishpond sludge, including a template and a positioning module slidably connected to the template. The template has an installation port located on the sliding path of the positioning module. The installation port is used to add the positioning module into the template. The template has a cover plate that covers the installation port. The positioning module has an elastic airbag that corresponds to the honeycomb cells of the honeycomb cell. The elastic airbag extends into the honeycomb cell corresponding to the honeycomb cell. The template has a positioning element that positions the honeycomb cell through the positioning element.

[0024] By adopting the above technical solution, the honeycomb grid is opened and fixed to the template by positioning components. Moving the positioning module allows elastic airbags to extend into the corresponding honeycomb cells, and then the support grid is placed into its corresponding cell. Inflation of the elastic airbags causes them to expand and press against the inner wall of the support grid, facilitating the fixation of the support grid and the honeycomb cells. During the insertion of the honeycomb cells and support grids into the silt, the elastic airbags deflate and contract. After the honeycomb cells and support grids have penetrated the bottom of the silt, the positioning between the honeycomb cells and the template is released, completing the installation and making the process convenient.

[0025] Preferably, the positioning module is provided with magnetic groups, and the magnetic poles on the side of adjacent magnetic groups that are close to each other are the same.

[0026] By adopting the above technical solution, the magnetic poles on adjacent positioning modules repel each other, making the distance between the positioning modules sliding on the template equal, which facilitates the elastic airbag to be inserted into the corresponding honeycomb cell.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The anode of the microbial fuel cell is fixed in the sludge pond through a honeycomb grid. The anode and cathode of the microbial fuel cell are connected on the fishpond to form a microbial fuel cell device. This drives the activity of electrogenic microorganisms in the sludge. The active microorganisms promote the reaction between the microorganisms and organic pollutants in the sludge, thereby promoting the self-purification process of the sludge and reducing the damage to the bottom ecological structure of the fishpond caused by the treatment of fishpond sludge.

[0029] 2. The height of the microbial fuel cell cathode can be adjusted by adjusting the length of the nylon rope between the support rod and the cathode of the microbial fuel cell, so that the microbial fuel cell can be used for different water levels;

[0030] 3. During the process of inserting the honeycomb cell and support cell into the silt, the elastic airbag deflates and contracts. After the honeycomb cell and support cell are inserted into the bottom of the silt, the positioning between the honeycomb cell and the template is released to complete the installation, making the installation convenient. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure after the construction of this embodiment is completed, mainly showing the installation location of the microbial fuel cell device.

[0032] Figure 2 This is a schematic diagram of the overall structure of the construction equipment in this embodiment.

[0033] Figure 3 This is a structural diagram showing the honeycomb cell installed on the template, mainly illustrating the positional relationship between the elastic airbag and the honeycomb cells of the honeycomb cell.

[0034] Explanation of reference numerals in the attached drawings: 1. Honeycomb cell; 2. Support cell; 3. Microbial fuel cell cathode; 31. Support rod; 32. Nylon rope; 33. Float; 4. Microbial fuel cell device; 5. Template; 51. Slot; 52. Screw; 53. Positioning component; 531. Strap; 54. Sliding rod; 55. Mounting port; 56. Cover plate; 6. Positioning module; 61. Elastic airbag; 62. Magnetic assembly; 621. Magnetic block. Detailed Implementation

[0035] This application discloses a construction method for remediating fishpond sludge using microbial fuel cells, which is used to treat fishponds and includes the following steps:

[0036] Reference Figure 1 and Figure 2 The width of the fishpond bank was measured, and honeycomb cells 1 of appropriate size were customized according to the size of the construction site and the thickness of the silt. Support cells 2, made of PVC with added carbon powder and possessing good electrical conductivity, were customized to support the honeycomb cells 1 based on the thickness of the bottom mud and the size of the experimental site. The honeycomb cells 1 were unfolded and installed onto the pre-prepared template 5 using positioning components 53. The support cells 2 were then placed inside the cells of the honeycomb cells 1 to support them. Both the honeycomb cells 1 and the support cells 2 were then fixed to the template 5. Rivets were installed on the honeycomb cells 1 for positioning and engaging with the silt.

[0037] The underwater silt used in the construction is stirred using a mixer to soften the solidified silt. A filter screen is inserted into the silt to filter out gravel and debris. The template 5 is raised so that the honeycomb cells 1 and support cells 2 face the silt. The template 5 is then moved downwards, and rivets, honeycomb cells 1, and support cells 2 are sequentially inserted into the silt. Once the rivets, honeycomb cells 1, and support cells 2 are engaged at the bottom of the silt and positioned, the positioning between the honeycomb cells 1 and the template 5 is released. The upper end of the honeycomb cells 1 protrudes 1-2 cm from the silt. The honeycomb cells 1, as a new type of high-strength geosynthetic material, possess excellent mechanical properties, high load-bearing capacity, and erosion resistance. It can effectively improve the load-bearing capacity of the silt during construction and prevent secondary pollution caused by silt scouring and suspension. In this embodiment, the honeycomb cells 1 protrude 2 cm from the silt.

[0038] Reference Figure 1After installing the honeycomb cell 1 into the fishpond, the honeycomb cell 1 with the supporting cell 2 serves as the anode of the microbial fuel cell. Several support rods 31 are inserted into the fishpond, spaced around the perimeter and located at the four corners. In this embodiment, the support rods 31 are steel bars with a diameter of 2mm and a length of 3mm, inserted 1m into the bottom mud and 2m above the water surface. A nylon rope 32 is fixed to each support rod 31. The pre-prepared microbial fuel cell cathode 3 is then taken out, and several floats 33 are installed on it, arranged around the perimeter of the cathode, allowing it to float on the water surface. The nylon rope 32 is also arranged around the perimeter of the cathode, with the section of the nylon rope 32 furthest from the steel bar fixedly connected to the cathode. In this embodiment, the microbial fuel cell cathode 3 is a graphite felt plate.

[0039] During installation, the length of the nylon rope 32 is adjusted to prevent the microbial fuel cell cathode 3 from moving with the water waves when it floats on the water surface.

[0040] After installing the microbial fuel cell cathode 3 and anode, the cathode 3 and anode are connected by wires. The end of the wire connected to the cathode 3, furthest from the cathode 3, extends to the shore working area and connects to the power supply device, forming a closed loop between the cathode 3 and anode, thus creating the microbial fuel cell device 4. This activates the electrogenic microorganisms within the sludge, promoting a reaction between the microorganisms and organic pollutants in the sludge, thereby achieving the self-purification of the sludge.

[0041] An energy storage device and a light-emitting device are connected externally to the cathode 3 of the microbial fuel cell via wires. The energy storage device is connected to the cathode 3 of the microbial fuel cell via wires, and the light-emitting device is connected to the energy storage device via wires. The energy storage device is used to store the electrical energy generated in the microbial fuel cell device 4 and to provide electrical energy to the light-emitting device for lighting. The microbial fuel cell device 4 generates electrical energy for lighting while promoting the self-purification of sludge.

[0042] After the microbial fuel cell device 4 is installed, exogenous purifying bacteria are introduced into the fishpond. These exogenous purifying bacteria include sulfur bacteria, nitrifying bacteria, denitrifying bacteria, yeast, Bacillus, Rhodopseudomonas palustris, and biological enzymes. The biological enzymes produced during the rapid reproduction of the purifying bacteria oxidize the black and smelly bottom mud and water in the fishpond, thus accelerating the removal of pollutants from the sludge.

[0043] The combination of exogenous purifying bacteria and microbial fuel cell device 4 to purify fishpond sludge is beneficial to improving the sludge purification efficiency.

[0044] After all the above operations were completed, in order to verify the purification effect of the sludge, the organic matter content of the sludge was tested in several stages on a monthly basis. The tests showed that...

[0045] The implementation principle of the microbial fuel cell repair construction method for fishpond sludge in this application embodiment is as follows: the honeycomb cell 1 with support grid 2 is installed to the bottom of the sludge through the template 5, so that the support grid 2 is in full contact with the sludge. After the microbial fuel cell is installed, it stimulates the activity of electrogenic microorganisms in the sludge. The active microorganisms promote the reaction between microorganisms and organic pollutants in the sludge, thereby achieving the self-purification process of the sludge and reducing the damage to the ecological structure of the fishpond bottom caused by fishpond sludge remediation.

[0046] On the other hand, refer to Figure 2 and Figure 3 This application provides a construction device for the remediation of fishpond sludge using microbial fuel cells, including a template 5 and a positioning module 6. The size of the template 5 is adapted to the size of the honeycomb cell 1. The template 5 is a rectangular frame with slots 51 for the honeycomb cell 1 to be inserted. Screws 52 are threaded through the template 5 and located at the four corners of the slots 51. The honeycomb cell 1 is fitted around the outer periphery of the screws 52 and is held open by the screws 52 on the template 5. Several positioning elements 53 are fixed on the template 5. The positioning elements 53 are straps 531, which are arranged around the outer periphery of the honeycomb cell 1. The straps 531 are threaded through the honeycomb cells of the honeycomb cell 1 and the template 5 for positioning. After the honeycomb cell 1 is opened, it is inserted into the slots 51. The positioning elements 53 are threaded through the template 5 and the honeycomb cell 1 in sequence, supporting the honeycomb cell 1 while keeping it open.

[0047] Several positioning modules 6 are slidably connected to the template 5. The sliding direction of the positioning modules 6 is parallel to the length direction of the honeycomb cell 1. Several sliding rods 54 are fixed on the template 5. The sliding rods 54 are cylindrical rods. The length direction of the sliding rods 54 is parallel to the sliding direction of the positioning modules 6. The distribution direction of the sliding rods 54 is perpendicular to their own length direction. The sliding rods 54 are distributed horizontally. The positioning modules 6 are evenly distributed on the sliding rods 54. The sliding rods 54 pass through the positioning modules 6, and the positioning modules 6 move along the length direction of the sliding rods 54. The number of positioning modules 6 corresponds one-to-one with the number of honeycomb cells in the honeycomb cell 1. The template 5 has installation ports 55. The position and number of installation ports 55 correspond one-to-one with the position and number of sliding rods 54. The installation ports 55 are located on the same side of the sliding rods 54 and on the extension path of the sliding rods 54. Additional positioning modules 6 can be added to the sliding rods 54 through the installation ports 55. A cover plate 56 is fixed on the template 5. The cover plate 56 is fixed to the template 5 by screws. The cover plate 56 is used to cover the installation port 55.

[0048] During actual installation, the number of honeycomb cells 1 in different honeycomb cells 1 varies along their length. When the number of positioning modules 6 is less than the number of honeycomb cells in the same row of honeycomb cell 1, the cover plate 56 is opened, and the positioning modules 6 are installed onto the corresponding sliding rods 54 through the mounting ports 55, so that the number of positioning modules 6 on the sliding rods 54 matches the number of honeycomb cells in the same row of honeycomb cell 1. Then the cover plate 56 is closed. After the honeycomb cell 1 is installed onto the template 5, the positioning modules 6 extend into the corresponding honeycomb cells of the honeycomb cell 1, so that each honeycomb cell in the honeycomb cell 1 has a positioning module 6.

[0049] An elastic airbag 61 is fixed to the positioning module 6. The elastic airbag is located on the side of the positioning module 6 closest to the honeycomb cell 1. The elastic airbag 61 extends into the honeycomb cell of the honeycomb cell 1. The elastic airbag 61 is slidably connected to the sliding rod 54 through the positioning module 6. An inflation tube is fixed to the elastic airbag 61. The inflation tube is used to inflate the elastic airbag 61, and the elastic airbag 61 deflates through the inflation tube. In this embodiment, the inflation tube is a flexible tube, which is not shown in the attached drawings.

[0050] A magnetic assembly 62 is fixed on the positioning module 6. The magnetic assembly 62 includes two magnetic blocks 621. The magnetic poles of the two magnetic blocks 621 are different on their adjacent sides, and the ends of the two magnetic blocks 621 are attracted together. The magnetic poles of adjacent magnetic assemblies 62 on the same sliding rod 54 are the same, so that the magnetic assembly 62 is subject to the repulsive force of the adjacent magnetic assemblies 62. The magnetic force of each magnetic assembly 62 is the same, so that the positioning modules 6 on the same sliding rod 54 are evenly spaced, which facilitates the accurate insertion of the elastic airbag 61 on the positioning module 6 into the honeycomb grid of the honeycomb cell 1. The magnetic assembly 62 is located on the side of the positioning module 6 away from the elastic airbag 61.

[0051] In actual use, the number of honeycomb cells along the length of the honeycomb cell 1 is calculated. Based on this number, the number of positioning modules 6 on the sliding rod 54 is increased or decreased to ensure that the number of positioning modules 6 on the sliding rod 54 matches the number of honeycomb cells in the honeycomb cell 1. Several positioning elements 53 are then inserted through the template 5, extending into the four corners of the slot 51. After the honeycomb cell 1 is unfolded, the honeycomb cells are evenly spaced. The positioning modules 6 on the same sliding rod 54 are evenly distributed on the sliding rod 54 under the action of the magnetic group 62. The honeycomb cell 1 is unfolded and inserted into the slot 51, with the positioning elements 53 abutting against the honeycomb cell 1 to keep the moisture-proof partition unfolded. Finally, the honeycomb cell 1 and the template 5 are fixed together using straps 531. At this time, the honeycomb grids distributed along the length of the honeycomb plate are evenly spaced, and the positioning modules 6 sliding on the same sliding rod 54 are evenly distributed on the sliding rod 54 under the action of the magnetic group 62, so that each elastic airbag 61 is located in the honeycomb grid of the honeycomb grid chamber 1.

[0052] After fixing the honeycomb cell 1 to the template 5, the pre-processed support cell 2 is taken out and placed into each honeycomb cell to support the honeycomb cell 1. At this time, the elastic airbag 61 is located inside the support cell 2. Then, the elastic airbag 61 is inflated, causing it to expand and press against the inner wall of the support cell 2, making it difficult for the support cell 2 to detach from the elastic airbag 61. This positions the support cell 2 and the template 5, thereby achieving the positioning between the support cell 2 and the honeycomb cell 1. When the elastic airbag 61 expands and presses against the inner wall of the support cell 2, the elastic airbag 61 does not protrude from the end of the support cell 2 away from the template 5. This eliminates the need for a large number of screws to fix the support cell 2 and the honeycomb cell 1, which helps improve the positioning efficiency between the support cell 2 and the honeycomb cell 1.

[0053] After installing the honeycomb cell 1 and the support cell 2 onto the template 5, flip the template 5 so that the support cell 2 and the honeycomb cell 1 face downwards. Move the template 5 so that the support cell 2 and the honeycomb cell 1 penetrate into the silt. When the silt comes into contact with the expanded elastic airbag 61, the resistance encountered by the support cell 2 and the honeycomb cell 1 in penetrating the silt increases, releasing the gas in the elastic airbag 61. The elastic airbag 61 contracts, allowing the support cell 2 and the honeycomb cell 1 to continue moving and extending into the bottom of the silt. After the support cell 2 and the honeycomb cell 1 are penetrated into the bottom of the silt, loosen the tie 531 to disconnect the support cell 2 and the honeycomb cell 1. Remove the template 5, the elastic airbag 61 and the positioning piece 53, leaving the support cell 2 and the honeycomb cell 1 in the fishpond.

[0054] The implementation principle of the fishpond sludge microbial fuel cell repair construction equipment in this application embodiment is as follows: the elastic airbag 61 is inflated and pressed against the inner wall of the support grid 2, which facilitates the fixation of the support grid 2 and honeycomb cell 1 when they penetrate the sludge. Furthermore, the elastic airbag 61 can be reused to fix the support grid 2 and honeycomb cell 1, which helps to reduce installation costs.

[0055] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fish pond sludge microbial fuel cell remediation construction method for treating a fish pond, characterized in that: It comprises the following steps: ​ S1, customizing the honeycomb cell (1) and the support grid (2) with conductive properties, positioning the honeycomb cell (1) and the support grid (2) using a template (5), and the support grid (2) as the anode of the microbial fuel cell; S2, softening the silt using mechanical stirring, and positioning the honeycomb cell (1) and the support grid (2) in the silt after softening through the template (5); S3, removing the template (5) and leaving the honeycomb cell (1) and the support grid (2) in the silt; S4, installing the cathode (3) of the microbial fuel cell on the fish pond, connecting the cathode (3) of the microbial fuel cell, the anode of the microbial fuel cell, and the power supply through wires to form a microbial fuel cell device (4); S5, regularly monitoring the organic matter in the silt; It also comprises a fish pond silt microbial fuel cell repair construction equipment for positioning the honeycomb cell (1) and the support grid (2), comprising a template (5) and a positioning module (6) slidably connected to the template (5), the template (5) is provided with a mounting port (55), the mounting port (55) is located on the sliding path of the positioning module (6), the mounting port (55) is used for adding the positioning module (6) to the template (5), the template (5) is provided with a cover plate (56), the cover plate (56) covers the mounting port (55), the positioning module (6) is provided with an elastic air bag (61), the elastic air bag (61) is correspondingly arranged with the honeycomb cell (1), the elastic air bag (61) extends into the corresponding honeycomb cell (1), and the template (5) is provided with a positioning piece (53).

2. The fish pond sludge microbial fuel cell remediation construction method according to claim 1, characterized in that: The silt is softened mechanically, and the stones and sundries in the silt are cleaned.

3. The fish pond sludge microbial fuel cell remediation construction method according to claim 1, characterized in that: Exogenous purification bacteria are put into the fish pond.

4. The fish pond sludge microbial fuel cell remediation construction method according to claim 1, characterized in that: The microbial fuel cell device (4) is externally connected with an energy storage device and a light emitting device.

5. The fish pond sludge microbial fuel cell remediation construction method according to claim 1, characterized in that: Supporting rods (31) are arranged around the fish pond, nylon ropes (32) are connected to the supporting rods (31), the nylon ropes (32) are connected with the cathode (3) of the microbial fuel cell, and the cathode (3) of the microbial fuel cell is floated on the water surface.

6. The fish pond sludge microbial fuel cell remediation construction method according to claim 5, characterized in that: A floating block (33) is installed on the cathode (3) of the microbial fuel cell.

7. The fish pond sludge microbial fuel cell remediation construction method according to claim 1, characterized in that: After the honeycomb cell (1) is inserted into the silt, the height of the honeycomb cell (1) is 1-2 cm higher than the silt.

8. The fish pond sludge microbial fuel cell remediation construction method according to claim 1, characterized in that: The positioning module (6) is provided with a magnetic group (62), and the magnetic poles of the adjacent magnetic groups (62) on the same side are the same.

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