CN115286120B - Electrode type artificial ecological floating island device and method for synchronously repairing water body and bottom mud - Google Patents

Electrode type artificial ecological floating island device and method for synchronously repairing water body and bottom mud Download PDF

Info

Publication number
CN115286120B
CN115286120B CN202210960471.1A CN202210960471A CN115286120B CN 115286120 B CN115286120 B CN 115286120B CN 202210960471 A CN202210960471 A CN 202210960471A CN 115286120 B CN115286120 B CN 115286120B
Authority
CN
China
Prior art keywords
anode
cathode
dimensional
water
bottom mud
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210960471.1A
Other languages
Chinese (zh)
Other versions
CN115286120A (en
Inventor
蒋晴
薛建良
史可
马菡
乔延路
高宇
王坤华
王浩
鲁浩蕴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong University of Science and Technology
Original Assignee
Shandong University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong University of Science and Technology filed Critical Shandong University of Science and Technology
Priority to CN202210960471.1A priority Critical patent/CN115286120B/en
Publication of CN115286120A publication Critical patent/CN115286120A/en
Application granted granted Critical
Publication of CN115286120B publication Critical patent/CN115286120B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/20—Total organic carbon [TOC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The invention discloses an electrode type artificial ecological floating island device and a method for synchronously repairing water and bottom mud, and belongs to the technical field of water repair. The electrode type artificial ecological floating island device comprises a three-dimensional anode system buried in bottom mud, a three-dimensional cathode system floating on the water surface, and a wire and a resistor for connecting the three-dimensional anode system and the three-dimensional cathode system; the device can be installed in the water body to be treated to repair the water body and the bottom mud. The device increases the dissolved oxygen content of the water body by establishing the cathode electrode for culturing the aquatic plants, and couples the artificial ecological floating island with the sediment microbial fuel cell, thereby realizing synchronous restoration of the black and odorous water body and the sediment; in addition, the invention changes the traditional two-dimensional plane anode into a three-dimensional structure, introduces low-cost natural conductive pyrite as anode filler, expands the effective area of the anode electrode and effectively promotes the repairing effect.

Description

Electrode type artificial ecological floating island device and method for synchronously repairing water body and bottom mud
Technical Field
The invention belongs to the technical field of water body restoration, and particularly relates to an electrode type artificial ecological floating island device and a method for synchronously restoring water body and bottom mud.
Background
Along with the continuous acceleration of the industrialization process and the continuous improvement of the economic level, a large amount of sewage and wastewater is discharged at will, so that the problems of eutrophication, blackening, odor and the like of the water body are caused, and the living quality of nearby residents is directly influenced. There are many methods for treating black and odorous water bodies at present: for example, the black and odorous water body is improved by controlling an external pollution source, or the black and odorous water body is restored in situ by an artificial ecological floating island, but the black and odorous substrate sludge at the bottom cannot be treated fundamentally.
In addition, the sediment microbial fuel cell is a bioelectrochemical technology for in-situ sediment repair, and has the action principle that an anode is placed in anaerobic sediment, electroactive bacteria attached to the anode electrode can degrade organic pollutants in the sediment, generated electrons are transmitted to a cathode in an upper water body through an external circuit, and oxygen at the cathode combines with the electrons and protons transmitted by the anode to generate water, so that the energy is recovered while the organic pollutants in the sediment are removed. However, at present, sediment microbial fuel cells face two problems when being popularized in large-scale engineering applications: (1) The sediment microbial fuel cell may have reduced electrode area ratio due to expansion, and the electroactive process has low efficiency, while the traditional electrode expansion means multiplication of construction cost, which is not beneficial to engineering popularization; (2) The black and odorous water body has low dissolved oxygen content and poor reoxygenation capability, so that an artificial aeration mode is generally needed to provide oxygen for the cathode in the practical application process, and the energy consumption is increased.
Disclosure of Invention
Aiming at the problems, the invention provides an electrode type artificial ecological floating island device and a method for synchronously repairing water and bottom mud, wherein a three-dimensional electrode type artificial ecological floating island is adopted as a microbial fuel cell, and the dissolved oxygen content of the water is increased by increasing the effective area of an anode electrode and establishing a cathode electrode for culturing aquatic plants, so that the synchronous repair of black and odorous water and bottom mud is realized, the ecological ornamental value is realized, and the natural environment is protected.
The electrode type artificial ecological floating island device comprises a three-dimensional anode system buried in bottom mud, a three-dimensional cathode system floating on the water surface, and a wire and a resistor for connecting the three-dimensional anode system and the three-dimensional cathode system;
The three-dimensional anode system comprises a plurality of anode support plates, wherein a three-dimensional grid structure is formed among the plurality of anode support plates, each grid forms an anode cavity, and anode electrodes are filled in the anode cavities;
The three-dimensional cathode system comprises a plurality of cathode support plates, wherein a three-dimensional grid structure is formed among the plurality of cathode support plates, each grid forms a cathode cavity, and cathode electrodes are filled in the cathode cavities;
the three-dimensional cathode system further comprises a floating body which is used for supporting the plurality of cathode supporting plates and enabling the plurality of cathode supporting plates to float on the water surface, a space formed by the floating body and the cathode cavity is filled with matrix materials, and aquatic plants are planted on the matrix materials.
Wherein the anode electrode and the cathode electrode are made of carbon materials, metal materials or conductive polymer materials; the anode support plate and the cathode support plate are made of nonconductive insulating materials;
The device is arranged in a water body to be treated, the three-dimensional anode system is buried in anoxic water body bottom mud, the three-dimensional cathode system floats on the surface of the water body, the lead is communicated with anode materials of the three-dimensional anode system and cathode materials of the three-dimensional cathode system, and a resistor is connected to the lead to form a closed loop. Under the action of anaerobic microorganisms in the sediment, organic matters in the sediment of the water body are metabolized and decomposed by the anaerobic microorganisms, and electrons are generated, and can pass through cell membranes to be transferred to extracellular anode electrodes, namely, the anode serves as a solid electron acceptor of the anaerobic microorganisms, namely, an electron transfer process. The anode electrons are then transferred to the cathode through an external circuit (i.e., wires and resistors). The cathode is positioned on the surface of the water body, the aquatic plants planted in the three-dimensional cathode system are subjected to photosynthesis under the illumination of the sun to release oxygen, and the oxygen receives electrons transmitted from the anode to generate reduction reaction to generate water, so that the electricity generation process is completed, and in the process, organic pollutants in the sediment are degraded and current is synchronously generated. In addition, the three-dimensional cathode system can synchronously realize water purification: aquatic plants in the three-dimensional cathode system and microorganisms attached to surfaces of matrix materials, cathode electrodes, floating bodies, plant root systems and the like can degrade and absorb pollutants in a part of water body; meanwhile, the growth of the aquatic plants can shield the sunlight on the water surface, so that photosynthesis of algae is inhibited, and the possibility of eutrophication of the water body is reduced.
On the basis, the device also comprises a conductive metal material; and after the anode electrode in each anode cavity or the cathode electrode in each cathode cavity is connected in series by the conductive metal material, the anode electrodes in different anode cavities or the cathode electrodes in different cathode cavities are connected in series. The structure converts a single anode into a three-dimensional multi-anode structure, converts a single cathode into a three-dimensional multi-cathode structure, greatly improves the surface area of the anode, provides more attachment sites for anode electroactive bacteria, and plays a certain role in fixing substrate sludge; compared with the traditional one-piece cathode, the three-dimensional cathode is more beneficial to capturing oxygen to generate oxygen reduction effect and is beneficial to the restoration effect of water.
On the basis, the bottom of the anode cavity is provided with an anode reinforcing material. The anode reinforcing material is pyrite. The pyrite has low cost and is convenient to obtain, and because the pyrite releases Fe (III) in the oxidation process, the Fe (III) can promote the electron transfer process, thereby further promoting the electric activity process of the anode, further expanding the range of the anode to the area beyond the anode electrode, accelerating the repair process of the bottom mud, and further improving the degradation effect of organic pollutants in the bottom mud.
On the basis, the device also comprises a fixing bracket for fixing the three-dimensional cathode system, and the bottom of the fixing bracket is fixed in the bottom mud. Because the three-dimensional cathode system floats on the water surface, the three-dimensional cathode system can be positioned at a relatively determined position, the observation, the detection and the maintenance are convenient, and the three-dimensional anode system is connected with the three-dimensional cathode system only through a wire, so that the whole stability of the microbial fuel cell can be improved by the fixing support.
As a specific scheme, the fixing bracket comprises a plurality of fixing rods, wherein each fixing rod comprises a first rod body and a second rod body; one end of the second rod body is inserted into the first rod body and can move along the direction of the first rod body; one end of the second rod body far away from the first rod body is fixedly connected with the floating body, and one end of the first rod body far away from the second rod body is fixed in the bottom mud. Because the aquatic plant needs to satisfy specific growing environment, three-dimensional cathode system needs to float on the surface of water all the time, and the second pole body of this kind of fixed bolster can be along with the motion of water and the activity from top to bottom to make three-dimensional cathode system can rise or descend along with the water level under the effect of gravity and buoyancy, ensure that it floats in the water surface all the time.
The method for synchronously repairing the water body and the bottom mud is characterized in that the electrode type artificial ecological floating island device is arranged in the water body to be treated, and the method synchronously purifies and repairs the black and odorous water body and the bottom mud.
As a specific scheme, the method is realized by the following steps: firstly, burying an anode reinforcing material into bottom mud 15cm below a mud-water interface, and placing a three-dimensional anode system above the anode reinforcing material; then floating the three-dimensional cathode system on the water surface, and installing fixing brackets around the three-dimensional cathode system to fix the three-dimensional cathode system above the three-dimensional anode system so as not to drift along with water flow; finally, connecting the three-dimensional anode system and the three-dimensional cathode system through a wire and a resistor to form a closed loop.
The invention has the advantages that: the invention provides an electrode type artificial ecological floating island device suitable for synchronously repairing black and odorous water bodies and substrate sludge, which changes a traditional two-dimensional plane anode into a three-dimensional structure, introduces low-cost natural conductive pyrite as anode filler, further expands the electric activity range of the anode, effectively promotes the repairing effect, and on the other hand, strengthens the repairing effect of the ecological floating island by coupling the artificial ecological floating island with a sediment microbial fuel cell and utilizes a bioelectrochemical technology, and can utilize the root system oxygenize of aquatic plants in the artificial ecological floating island on the surface of the water body to provide oxygen for a bioelectrochemical cathode so as to realize synchronous repairing of the substrate sludge and the water body. The device and the method can be applied to the restoration of surface water bodies such as polluted rivers, lakes, ditches and the like and bottom mud thereof, and have low operation cost, simple maintenance and ecological benefits.
Drawings
FIG. 1 is a schematic view showing the overall structure of the apparatus in example 1;
Fig. 2 is a schematic structural view of the three-dimensional anode system described in embodiment 1;
FIG. 3 is a schematic view of the structure of the three-dimensional anode system after filling the anode material described in example 1;
fig. 4 is a schematic structural diagram of the three-dimensional stereo cathode system described in embodiment 1;
FIG. 5 is a schematic view of the three-dimensional solid cathode system after filling the cathode material in example 1;
FIG. 6 is a graph showing the effect of water purification in example 3;
FIG. 7 is a graph showing the effect of bottom mud remediation in example 3.
Detailed Description
The terms used in the present invention generally have meanings commonly understood by those of ordinary skill in the art unless otherwise indicated.
The invention will be described in further detail below in connection with specific embodiments and with reference to the data. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
As shown in fig. 1, an electrode type artificial ecological floating island device comprises a three-dimensional anode system 1 buried in bottom mud, a three-dimensional cathode system 2 floating on the water surface, and a lead 3 and a resistor 4 for connecting the three-dimensional anode system 1 and the three-dimensional cathode system 2;
specifically, as shown in fig. 2, the three-dimensional anode system 1 includes a plurality of anode support plates 1-1, and a plurality of anode support plates 1-1 are staggered to form a three-dimensional grid-like structure (the grids can be diamond-shaped or square or rectangular), each grid is an anode cavity 1-11, and an anode electrode 1-2 is arranged in the anode cavity 1-11, as shown in fig. 3; the anode support plates 1-1 can be connected and fixed in a splicing manner, and the anode electrodes 1-2 can be attached to the surface of the anode support plate 1-1 (namely, the inner wall of the anode cavity 1-11) or filled into each grid;
As shown in fig. 4, the three-dimensional cathode system 2 includes a plurality of cathode support plates 2-1, and the cathode support plates 2-1 are staggered to form a three-dimensional grid-like structure (the grids can be diamond-shaped or square or rectangular), each grid is a cathode cavity 2-11, and cathode electrodes 2-2 are disposed in the cathode cavities 2-11, as shown in fig. 5; the cathode support plates 2-1 can be connected and fixed in a splicing manner, and the cathode electrode 2-2 can be attached to the surface of the cathode support plate 2-1 (namely, the inner wall of the cathode cavity 2-11) or filled into each grid;
As shown in fig. 4 and 5, the three-dimensional cathode system 2 further comprises a floating body 2-3 for supporting the plurality of cathode support plates 2-1 and floating the plurality of cathode support plates 2-1 on the water surface, wherein a space formed by the floating body 2-3 and the cathode cavity 2-11 is filled with a matrix material, and aquatic plants are planted on the matrix material; as a specific scheme, the floating body 2-3 may be made of plastic, a foam board, bamboo, wood strips, rattan, a novel high molecular light material (such as polyvinyl chloride foam board, polystyrene foam, phenolic foam, water-soluble polyurethane, polypropylene) and the like, and only needs to provide enough buoyancy for the three-dimensional cathode system 2 to balance with gravity, so as to float on the water surface; the floating body 2-3 can be fixedly connected with the cathode support plate 2-1 by means of screws, binding ropes and the like.
The device is arranged in a water body to be treated, the three-dimensional anode system 1 is embedded in anoxic water body sediment, the three-dimensional cathode system 2 floats on the surface of the water body, the lead 3 is communicated with the anode material 1-2 of the three-dimensional anode system 1 and the cathode material 2-2 of the three-dimensional cathode system 2, and the lead 3 is connected with the resistor 4 to form a closed loop. Under the action of anaerobic microorganisms in the sediment, organic matters in the sediment of the water body are metabolized and decomposed by the anaerobic microorganisms, and electrons are generated, and can pass through cell membranes to be transferred to the extracellular anode electrode 1-2, namely, the anode is used as a solid electron acceptor of the anaerobic microorganisms, namely, an electron transfer process. The anode electrons are then transferred to the cathode through an external circuit (i.e., lead 3 and resistor 4). The cathode is positioned on the surface of the water body, the aquatic plants planted in the three-dimensional cathode system 2 are subjected to photosynthesis under the illumination of the sun to release oxygen, and the oxygen receives electrons transmitted from the anode to undergo a reduction reaction to generate water, so that the electricity generation process is completed, and in the process, organic pollutants in the sediment are degraded and current is synchronously generated.
Besides repairing the water body sediment, the device can also synchronously realize the repair of black and odorous water bodies: the aquatic plant growing process in the three-dimensional cathode system 2 can assimilate and absorb pollutants such as nitrogen and phosphorus in the water body, and microorganisms attached to the surfaces of matrix materials, cathode electrodes, floating bodies, plant root systems and the like of the three-dimensional cathode system 2 can also degrade and absorb a part of pollutants. Meanwhile, the growth of the aquatic plants can shield the sunlight on the water surface, so that photosynthesis of algae is inhibited, and the possibility of eutrophication of the water body is reduced.
In addition, in order to adapt to the growth of aquatic plants, openings for water to pass through are arranged on the surfaces of the cathode support plate 2-1 and the floating body 2-3, so that the free flow of water can be allowed;
The matrix material is used for fixing plants and microorganisms and can enable the plants and microorganisms to be attached to a film; the following materials may be used, but are not limited to: one or more of granular materials such as ceramsite, volcanic rock, zeolite, gravel, quartz sand, expanded vermiculite, activated carbon, medical stone, sponge, carbon fiber balls, oyster shells, biological base materials and the like can be paved by adopting a layer paving or uniformly mixing mode;
The aquatic plants need to be suitable for water culture, and aquatic plants with strong purification capability and fast growth are selected, wherein the aquatic plants comprise, but are not limited to, rice, ryegrass, canna, water bamboo, reed, calamus, typha, lentinula edodes, rush, eichhornia crassipes, purple taro, cress, water spinach, iris, water lily, foxtail and the like, and the planting quantity can be arranged according to the area of a grid and the plant size in the planting process.
In order for the three-dimensional anode system 1 and the three-dimensional cathode system 2 to fully perform their respective functions, the anode support plate 1-1 and the cathode support plate 2-1 are each made of a nonconductive insulating material, including but not limited to: polyethylene, asbestos, rubber sheets, wood boards, and the like, or one or a combination of a plurality of the polyethylene, the asbestos, the rubber sheets, the wood boards, and the like. The anode electrode 1-2 and the cathode electrode 2-2 may be made of the following materials: carbon materials, metal materials, or conductive polymer materials, including in particular but not limited to: one or more of carbon cloth, carbon felt, carbon brush, carbon nanotube, graphene, graphite felt, graphite plate, graphite rod, graphite particles, granular activated carbon, biochar and the like.
Because the three-dimensional anode system 1 and the three-dimensional cathode system 2 are both in a three-dimensional grid structure, the connection modes between the anode electrodes 1-2 filled in the anode cavities 1-11 are numerous, and the connection modes between the cathode electrodes 2-2 filled in the cathode cavities 2-11 are also numerous, herein, as shown in fig. 3 and 5, the invention provides a specific implementation scheme: the device further comprises an electrically conductive metallic material 5; the conductive metal material 5 connects the anode electrode 1-2 in each anode cavity 1-11 or the cathode electrode 2-2 in each cathode cavity 2-11 in series, and then connects the anode electrode 1-2 in different anode cavities 1-11 or the cathode electrode 2-2 in different cathode cavities 2-11 in series. Wherein the conductive metal material 5 includes, but is not limited to, one or more of copper wires, titanium mesh, titanium plate, stainless steel mesh, nickel mesh, etc.
The structure converts a single anode into a three-dimensional multi-anode structure, converts a single cathode into a three-dimensional multi-cathode structure, greatly improves the surface area of the anode, provides more attachment sites for anode electroactive bacteria, and plays a certain role in fixing substrate sludge; compared with the traditional one-piece cathode, the three-dimensional cathode is more beneficial to capturing oxygen to generate oxygen reduction effect and is beneficial to the restoration effect of water.
The following describes in detail the connection and arrangement of the conductive metal material 5 by taking the anode as an example, and the connection between the different types of anode electrodes 1-2 and the conductive metal material 5 is different:
if the anode electrodes 1-2 are flexible materials such as carbon cloth, carbon felt, graphite felt and the like, the conductive metal material 5 can penetrate through the anode electrodes 1-2 in a stitch-like manner to communicate the two anode electrodes 1-2;
if the anode electrode 1-2 is made of carbon plate, graphite plate and other plate materials, the conductive metal material 5 can be clamped between two anode electrode plates to form a sandwich structure, wherein the conductive metal material 5 can be a metal plate or a metal net and is in staggered lap joint fixation with the two anode electrode plates so as to be communicated with the two anode electrode plates;
if the anode electrode 1-2 is in a granular structure such as active carbon, granular carbon and the like, a meshed conductive metal material 5 (such as a stainless steel mesh) is pre-embedded in the granular electrode to increase the contact area and promote conductivity;
If the anode electrode 1-2 is made of brush-shaped materials such as carbon brush, graphite brush and the like, the electrode is prepared by uniformly twisting equal-length carbon fiber wires between two spirally-wound titanium wires, so that the electrode is formed by connecting the electrode brushes in series by using the titanium wires;
After the anode electrodes 1-2 in each anode cavity 1-11 are connected in series, the anode electrodes 1-2 in different anode cavities 1-11 can be connected in series by adopting copper wires or titanium wires, and a soldering gun can be used for connecting the conductive metal material 5 (such as the copper wires or the titanium wires) with the anode electrodes 1-2 in the connecting process. In a preferred embodiment, the anode chambers 1-11 are connected in series according to an S-shaped or serpentine path.
The structure of the cathode and the anode is substantially similar and will not be described in detail herein.
On the basis, the bottom of the anode cavity 1-11 is provided with an anode reinforcing material 1-3. The anode reinforcing material 1-3 is pyrite. The length or the grain size of the pyrite can be regulated according to actual demands, the minimum size is 5mm, the maximum length is determined according to the area of the treated water body and the treated water quality, and the method is not limited. The pyrite has low cost and is convenient to obtain, and because the pyrite releases Fe (III) in the oxidation process, the Fe (III) can promote the electron transfer process, thereby further promoting the electric activity process of the anode, further expanding the range of the anode to the area beyond the anode electrode, accelerating the repair process of the bottom mud, and further improving the degradation effect of organic pollutants in the bottom mud.
On this basis, as shown in fig. 1, the device further comprises a fixing bracket 6 for fixing the three-dimensional stereo cathode system 2, wherein the bottom of the fixing bracket 6 is fixed in the bottom mud. As a specific scheme, the fixing bracket 6 includes a plurality of fixing rods 6-1 (4 in fig. 1), and the fixing rods 6-1 include a first rod body 6-11 and a second rod body 6-12; the first rod body 6-11 and the second rod body 6-12 are pipe bodies with different pipe diameters, the outer diameter of the second rod body 6-12 is smaller than the inner diameter of the first rod body 6-11, one end of the second rod body 6-12 is inserted into the first rod body 6-11, and the second rod body 6-12 can move along the direction of the first rod body 6-11; one end of the second rod body 6-12 far away from the first rod body 6-11 is fixedly connected with the floating body 2-3, and one end of the first rod body 6-11 far away from the second rod body 6-12 is fixed in the bottom mud.
Because the aquatic plants of the invention need to meet specific growing environments, the three-dimensional cathode system 2 needs to always float on the water surface, and the environment in the water is always in a changed state, the second rod bodies 6-12 of the fixing support 6 can move up and down along with the movement of the water body, so that the three-dimensional cathode system 2 can rise or fall along with the water level under the action of gravity and buoyancy, and the three-dimensional cathode system is ensured to always float on the surface of the water body. It should be noted that, the lengths of the second rod body 6-12 and the first rod body 6-11 in the present invention are long enough to ensure that the second rod body 6-12 does not separate from the first rod body 6-11 when the water surface rises.
As a specific scheme, the floating bodies 2-3 are provided with mounting holes 2-4 corresponding to the fixing rods 6-1 in number, when the floating body is mounted, the bottom of each fixing rod 6-1 (namely, one end of the first rod body 6-11 far away from the second rod body 6-12) is inserted into the bottom mud to be fixed, and the top (namely, one end of the second rod body 6-12 far away from the first rod body 6-11) is fixedly connected with the floating body 2-3 at the mounting holes 2-4 through screws and the like.
The installation and use method of the device comprises the following steps: firstly, selecting a water body to be treated (the water body comprises bottom mud and black and odorous water body), paving a layer of pyrite ore as an anode reinforcing material 1-3 at a position 15cm below a bottom mud-mud interface, and placing a three-dimensional anode system 1 above the pyrite ore; then placing a three-dimensional cathode system 2 on the surface of the water body to enable the three-dimensional cathode system to float on the water surface, adding a matrix material into a cathode cavity 2-11 of the three-dimensional cathode system 2, and planting aquatic plants; then, fixing brackets 6 are arranged around the three-dimensional cathode system 2 to fix the three-dimensional cathode system above the three-dimensional anode system 1 so as not to drift along with water flow; finally, a closed loop is formed by connecting the three-dimensional anode system 1 and the three-dimensional cathode system 2 through a lead 3 and a resistor 4.
Example 2
A method for synchronously repairing water and bottom mud uses an electrode type artificial ecological floating island device in the embodiment 1, a three-dimensional anode system 1 of the device is fixed in the bottom mud, a three-dimensional cathode system 2 floats on the water surface, and the three-dimensional anode system 1 and the three-dimensional cathode system 2 are connected through a wire 3 and a resistor 4 to form a closed loop. Wherein, as a preferable scheme, the anode reinforcing material 1-3 is embedded in the bottom mud 15cm below the mud-water interface.
The method simultaneously carries out synchronous purification and repair on the black and odorous water body and the sediment respectively from two aspects:
First aspect: a microbial fuel cell consisting of a three-dimensional anode system 1 and a three-dimensional cathode system 2; the anode and the cathode of the microbial fuel cell are respectively arranged in sediment at the bottom layer of the black and odorous water body and upper water body, indigenous microorganisms in the sediment can be attached to the anode electrode to degrade rich organic matters in the sediment, generated electrons are transmitted to the cathode in the upper water body through an external circuit, the cathode utilizes oxygen released by photosynthesis of plants in an ecological floating island and secreted by roots as an electron acceptor, and electrons transmitted by the anode through a lead are received and reduced, so that a closed loop is formed in the whole system to generate current, electric energy is generated while sediment treatment is realized, and weak current can stimulate the growth of microorganisms to a certain extent to strengthen the water body restoration effect.
Second aspect: an artificial ecological floating island formed by a three-dimensional cathode system 2; firstly, the rootstocks of aquatic plants absorb or adsorb nutrient substances such as nitrogen, phosphorus and the like in water, and the matrix material also has certain absorption and adsorption effects, so that the pollutant content in the water is reduced; secondly, the aquatic plants and the microorganisms have synergistic effect, the root systems of the aquatic plants mainly show that the root systems of the aquatic plants provide large-area attachment points for the microorganisms, and the root systems of the aquatic plants can secrete oxygen, so that alternating areas with oxygen, oxygen deficiency and no oxygen are formed around the roots of the aquatic plants, and the aquatic plants are suitable for the survival of various microorganisms, so that the degradation of the microorganisms on organic pollutants is accelerated, the microorganisms can degrade macromolecular substances, and the absorption of the plants on the pollutants can be further promoted; finally, due to the coverage of the aquatic plants, photosynthesis of algae on the water surface is reduced, so that growth of algae in the water body is inhibited.
Example 3
The electrode type artificial ecological floating island device in example 1 was placed in a cylinder with a diameter of 50cm, a height of 60cm and a wall thickness of 8cm to simulate water purification and sediment remediation.
As a specific scheme, the anode support plate 1-1 and the cathode support plate 2-1 are made of polyethylene plates; the anode electrode 1-2 is carbon fiber cloth, and the carbon fiber cloth is attached to the anode support plate 1-1; the cathode electrode 2-2 is a carbon felt, and the carbon felt is attached to the cathode supporting plate 2-1; the conductive metal material 5 is titanium wire, 1mm titanium wire is used to pass through carbon fiber cloth in the same anode cavity 1-2 to connect the titanium wire in series, and then titanium wires in different anode cavities 1-2 are connected in series according to an S shape through soldering tin; using 1.5mm titanium wires to pass through carbon felts in the same cathode cavity 2-2 to connect the titanium wires in the same cathode cavity in series, and then connecting the titanium wires in different cathode cavities 2-2 in series according to an S shape through soldering tin; the titanium wires of the anode electrode 1-2 and the titanium wires of the cathode electrode 2-2 are connected through copper wires and are connected in series with a 500 omega resistor to form a closed loop.
In addition, the anode reinforcing material 1-3 is natural pyrite ore with the grain size of 5-12 mm; the floating body is a high-density polyethylene plate (HDPE) with the diameter of 48cm and the thickness of 3cm, and an opening with the diameter of 3mm is arranged on the plate; the matrix material is quartz sand (particle size of 5-8 mm) and volcanic rock (particle size of 7-12 mm) which are uniformly mixed, the thickness of the matrix material is 5cm, and aquatic plants are planted above the matrix material.
The aquatic plants are typha, water spinach and cress, the initial total biomass is set to be 20g/L, the directly purchased aquatic plants are subjected to water culture for one week at 25 ℃, root soil is cleaned, the aquatic plants are transplanted into a matrix material, and the root systems of the aquatic plants penetrate through openings of the floating bodies 2-3 to be evenly distributed.
The device is used for purifying water and repairing bottom mud, and the repairing result is shown in fig. 6 and 7. Before restoration, the COD content of the water body in the cylinder is 25.4mg/L, the ammonia nitrogen content is 9.4mg/L, and the total organic carbon content in the sediment is 234mg/g; after 60 days of repair, the COD content in the cylinder is 8.6mg/L, the ammonia nitrogen content is 4.5mg/L, and the total organic carbon content is 104mg/g. Therefore, the device can realize synchronous restoration of the water body and the bottom mud, and has obvious effect.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims (5)

1. The method for synchronously repairing the water body and the bottom mud is characterized in that an electrode type artificial ecological floating island device is arranged in the water body to be treated;
the electrode type artificial ecological floating island device comprises a three-dimensional anode system (1) buried in bottom mud, a three-dimensional cathode system (2) floating on the water surface, a lead (3) and a resistor (4) which are used for connecting the three-dimensional anode system (1) and the three-dimensional cathode system (2);
The three-dimensional anode system (1) comprises a plurality of anode support plates (1-1), a three-dimensional grid structure is formed among the anode support plates (1-1), each grid forms an anode cavity (1-11), and anode electrodes (1-2) are filled in the anode cavities (1-11);
the three-dimensional cathode system (2) comprises a plurality of cathode support plates (2-1), a three-dimensional grid structure is formed among the plurality of cathode support plates (2-1), each grid forms a cathode cavity (2-11), and cathode electrodes (2-2) are filled in the cathode cavities (2-11);
The three-dimensional cathode system (2) further comprises a floating body (2-3) which is used for supporting a plurality of cathode supporting plates (2-1) and enabling the cathode supporting plates (2-1) to float on the water surface, a space formed by the floating body (2-3) and the cathode cavity (2-11) is filled with matrix materials, and aquatic plants are planted on the matrix materials;
Also comprises a conductive metal material (5); the conductive metal material (5) connects the anode electrode (1-2) in each anode cavity (1-11) or the cathode electrode (2-2) in each cathode cavity (2-11) in series, and then connects the anode electrodes (1-2) in different anode cavities (1-11) or the cathode electrodes (2-2) in different cathode cavities (2-11) in series;
the bottom of the anode cavity (1-11) is provided with an anode reinforcing material (1-3);
the anode reinforcing material (1-3) is pyrite; the grain diameter of the pyrite is 5-12mm;
the anode reinforcing material (1-3) is embedded in the bottom mud 15cm below the mud-water interface.
2. The method for synchronously repairing a water body and bottom mud according to claim 1, wherein the electrode type artificial ecological floating island device further comprises a fixing bracket (6) for fixing the three-dimensional solid cathode system (2), and the bottom of the fixing bracket (6) is fixed in the bottom mud.
3. Method for simultaneous restoration of a body of water and a foundation according to claim 2, wherein the fixing support (6) comprises a number of fixing rods (6-1), the fixing rods (6-1) comprising a first rod body (6-11) and a second rod body (6-12); one end of the second rod body (6-12) is inserted into the first rod body (6-11) and the second rod body (6-12) can move along the direction of the first rod body (6-11); one end of the second rod body (6-12) far away from the first rod body (6-11) is fixedly connected with the floating body (2-3), and one end of the first rod body (6-11) far away from the second rod body (6-12) is fixed in the bottom mud.
4. The method for synchronously repairing water and sediment according to claim 1, wherein the anode electrode (1-2) and the cathode electrode (2-2) are made of carbon material, metal material or conductive polymer material.
5. The method for synchronously repairing water and sediment according to claim 1, wherein the anode support plate (1-1) and the cathode support plate (2-1) are made of nonconductive insulating materials.
CN202210960471.1A 2022-08-11 2022-08-11 Electrode type artificial ecological floating island device and method for synchronously repairing water body and bottom mud Active CN115286120B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210960471.1A CN115286120B (en) 2022-08-11 2022-08-11 Electrode type artificial ecological floating island device and method for synchronously repairing water body and bottom mud

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210960471.1A CN115286120B (en) 2022-08-11 2022-08-11 Electrode type artificial ecological floating island device and method for synchronously repairing water body and bottom mud

Publications (2)

Publication Number Publication Date
CN115286120A CN115286120A (en) 2022-11-04
CN115286120B true CN115286120B (en) 2024-04-26

Family

ID=83829064

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210960471.1A Active CN115286120B (en) 2022-08-11 2022-08-11 Electrode type artificial ecological floating island device and method for synchronously repairing water body and bottom mud

Country Status (1)

Country Link
CN (1) CN115286120B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116425298B (en) * 2023-03-09 2023-09-19 福建省厦门环境监测中心站(九龙江流域生态环境监测中心) Microbial fuel cell sewage treatment equipment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108623011A (en) * 2018-07-04 2018-10-09 南通大学 A kind of coupling device of ecological floating island and microbiological fuel cell
CN208429939U (en) * 2018-06-22 2019-01-25 极膜环境科技（上海）有限公司 A kind of synchronous ecological floating island device for repairing overlying water and black smelly bed mud
CN109704520A (en) * 2019-02-13 2019-05-03 北京科技大学 Utilize plant-deposition microbiological fuel cell processing polluted river water method
CN110803843A (en) * 2019-11-21 2020-02-18 同济大学浙江学院 Device and method for jointly degrading organic matters in water body sediment by utilizing waste scrap iron and sediment microbial fuel cell
CN112094009A (en) * 2020-08-13 2020-12-18 天津大学 Polluted bottom mud treatment and electricity generation device for site

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210317018A1 (en) * 2018-08-30 2021-10-14 Greg Wanger Systems and methods for remediating aquaculture sediment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208429939U (en) * 2018-06-22 2019-01-25 极膜环境科技（上海）有限公司 A kind of synchronous ecological floating island device for repairing overlying water and black smelly bed mud
CN108623011A (en) * 2018-07-04 2018-10-09 南通大学 A kind of coupling device of ecological floating island and microbiological fuel cell
CN109704520A (en) * 2019-02-13 2019-05-03 北京科技大学 Utilize plant-deposition microbiological fuel cell processing polluted river water method
CN110803843A (en) * 2019-11-21 2020-02-18 同济大学浙江学院 Device and method for jointly degrading organic matters in water body sediment by utilizing waste scrap iron and sediment microbial fuel cell
CN112094009A (en) * 2020-08-13 2020-12-18 天津大学 Polluted bottom mud treatment and electricity generation device for site

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Bioenergy generation and simultaneous nitrate and phosphorus removal in a pyrite-based constructed wetland-microbial fuel cell;Ge Xiaoyan等;Bioresource Technology;第296卷;1-10 *
Plant-SMFC修复富营养化水体及底泥的效果研究;吴卿;付利娟;焦士埔;马梦醒;彭森;;中国给水排水(03);全文 *
沉积型微生物燃料电池效能的影响因素研究进展;赵晴;吴明松;王子;徐勋;仝心怡;;世界科技研究与发展(02);全文 *

Also Published As

Publication number Publication date
CN115286120A (en) 2022-11-04

Similar Documents

Publication Publication Date Title
CN102351387B (en) Artificial wetland coupling microbial fuel cell (MFC) system and method for improving removal efficiency of organic matters
CN105906159B (en) A kind of double coupled systems for the processing of irrigated area reinforced sewage
CN108178320B (en) Microbial fuel cell artificial wetland device and sewage purification method
CN105502673B (en) It is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification
CN103058383B (en) A kind of multifunctional modular chinampa for contaminated river lake in-situ immobilization
CN109231469B (en) Solar energy aquatic body ecological remediation floats bed system
CN104803552A (en) Method and device for purifying black and odorous river channels
CN107900095B (en) Self-generating current-rising wetland polluted soil remediation device and remediation method
CN115286120B (en) Electrode type artificial ecological floating island device and method for synchronously repairing water body and bottom mud
CN109607952A (en) A kind of reinforced phosphor-removing composite artificial wet land treating system
CN112174329A (en) Micro-electrolysis enhanced ecological floating bed coupling photocatalysis surface water ecological restoration device
CN210261492U (en) Plant floating bed device for repairing urban tidal river black and odorous bottom mud by using microbial fuel cell
CN219585896U (en) Iron-carbon micro-electrolysis-constructed wetland-microbial fuel cell
CN113024039A (en) Bioelectricity-enhanced subsurface flow wetland system and pollutant treatment method
CN104326574A (en) Horizontal subsurface wetland system for intensifying denitrification of micro-polluted water in winter
CN105541046B (en) It is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification
CN210559981U (en) Equipment for repairing urban tidal river black and odorous bottom mud by using microbial fuel cell
CN209721854U (en) A kind of reinforced phosphor-removing composite artificial wet land treating system
CN110713262A (en) Lake and bay pollution repair device capable of being transplanted and applied in modular mode and application thereof
CN212026704U (en) Energy type building green wall capable of purifying water body in arid region
CN210394104U (en) Electro-catalysis experimental device for downward subsurface flow constructed wetland
CN210085206U (en) Undercurrent type artificial wetland and microbial fuel cell combined device
CN211226526U (en) Modified carbon fiber filler sewage treatment plant
CN111003795B (en) Water body in-situ remediation method for strengthening floating ecological bed by using bioelectrochemistry
CN213085589U (en) Biomass charcoal-based microbial fuel cell floating wetland device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant