CN106746230B - electro-Fenton sewage treatment system and method based on power supply of arrayed wetland microbial fuel cells - Google Patents
electro-Fenton sewage treatment system and method based on power supply of arrayed wetland microbial fuel cells Download PDFInfo
- Publication number
- CN106746230B CN106746230B CN201611240733.8A CN201611240733A CN106746230B CN 106746230 B CN106746230 B CN 106746230B CN 201611240733 A CN201611240733 A CN 201611240733A CN 106746230 B CN106746230 B CN 106746230B
- Authority
- CN
- China
- Prior art keywords
- microbial fuel
- fuel cell
- electro
- wetland microbial
- wetland
- 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
Links
Images
Classifications
-
- 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
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- 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
- C02F3/005—Combined electrochemical biological processes
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/16—Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
-
- 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
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- 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)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Microbiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Fuel Cell (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Manufacturing & Machinery (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Inert Electrodes (AREA)
Abstract
The invention discloses an electro-Fenton sewage treatment system and method based on power supply of arrayed wetland microbial fuel cells. The system comprises: the nano iron-carbon micro-electrolysis reaction zone is used for pretreating sewage; the electro-Fenton system reaction area is used for treating the outlet water of the nano iron-carbon micro-electrolysis reaction area; the array wetland microbial fuel cell is used for treating and supplying power to the effluent of the reaction zone of the electro-Fenton system; the arrayed wetland microbial fuel cell is a wetland microbial fuel cell stack formed by connecting a plurality of wetland microbial fuel cells; and the cathode and the anode of the wetland microbial fuel cell stack are respectively connected with the corresponding anode and cathode of the electro-Fenton system reaction area through leads. The invention also provides a sewage treatment method. The invention strengthens the degradation effect through the combined action of the whole system, does not need external energy sources and does not need to add medicaments, and is an energy-saving and environment-friendly water treatment technology.
Description
Technical Field
The invention belongs to the technical field of water pollution control and water treatment, and particularly relates to an electro-Fenton water treatment system and method based on efficient power supply of arrayed wetland microbial fuel cells.
Background
The dye wastewater has the characteristics of complex components, deep chromaticity, high salt content and difficult biochemical degradation, poses a threat to public health safety, has more and more attention to the environmental safety effect, and has an urgent need to solve the problem of research on the treatment process of the dye wastewater. The biological electro-Fenton method provides external electric energy for an electro-Fenton system to generate H in situ2O2And Fe2+The dye molecules which are difficult to degrade are oxidized, and the biodegradability of the wastewater is improved.
Researches show that the nano iron-carbon micro-electrolysis technology can realize chain scission, color development and color-assisting group decoloration reduction of macromolecular organic matters, can effectively improve the biodegradability of wastewater, but cannot thoroughly treat refractory organic matters. Compared with the traditional iron-carbon micro-electrolysis process, the nano iron-carbon micro-electrolysis technology can effectively solve the problems that a system is easy to harden and the treatment efficiency is reduced in the iron-carbon micro-electrolysis process.
The Fenton technology has good treatment effect on the pollutants difficult to degrade, but needs to consume a large amount of Fe2+And H2O2The cost is high. The biological electro-Fenton method is a research hotspot in the technical field of water treatment at present as an efficient water treatment technology. Compared with other existing acid dye wastewater treatment processes, the biological electro-Fenton method can be used for treating toxic wastewater with high COD and salt content. Research shows that the advantages of treating the acid dye wastewater by using the bioelectricity Fenton method are mainly reflected in the following aspects: environment-friendly, simple equipment and high automation degree. Fe generated by electrochemical reaction in electro-Fenton system2+And H2O2The strong oxidizing OH generated in the electrolytic process as the continuous source (2) of the Fenton reagent is beneficial to breaking the cyclic structure of the acid dye macromolecules and improving the biodegradability of the acid dye wastewater. (3) The reaction condition is easy to control, can be finished under the normal temperature condition generally, and can be processed independently or coupled with other processing technologies, and the operability is strong. But the bioelectrochemical system consumes a large amount of electric energy, which limits the practical application of the bioelectrochemical system.
The artificial wetland has determined wastewater treatment capacity, the artificial wetland is coupled with the microbial fuel cell, the respective characteristics of the artificial wetland and the microbial fuel cell are fully utilized, the wastewater treatment capacity of the wetland is further improved, and the artificial wetland can be used for purifying wastewater and harvesting electric energy to supply electricity to other process units. However, the current artificial wetland-microbial fuel cell has the defects of large internal resistance and low output voltage and power, and how to further improve the output voltage of the cell and improve the practical performance of the cell needs to be further explored.
There are no reports of organically combining the above technologies.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects and shortcomings in the prior art and solve the problems in the prior art for treating acid dye wastewater, the invention provides an electro-Fenton wastewater treatment system and a treatment method based on power supply of arrayed wetland microbial fuel cells, wherein the iron-carbon microelectrolysis-electro-Fenton system is fully utilized to improve the biochemical performance of wastewater, so that the electrogenesis performance of the constructed wetland microbial fuel cells is improved, the constructed wetland microbial fuel cells are connected in series and in parallel to improve the output voltage to be supplied to the electro-Fenton system, the water quality is further evolved, and the degradation effect of acid dyes is finally improved.
The technical scheme is as follows:
the invention discloses an electro-Fenton sewage treatment system based on power supply of arrayed wetland microbial fuel cells, which comprises:
the nano iron-carbon micro-electrolysis reaction zone is used for pretreating sewage;
the electro-Fenton system reaction area is used for treating the outlet water of the nano iron-carbon micro-electrolysis reaction area;
the array wetland microbial fuel cell is used for treating the effluent of the reaction zone of the electro-Fenton system and supplying power to the effluent;
the nano iron-carbon micro-electrolysis reaction zone, the electro-Fenton reaction zone and the arrayed wetland microbial fuel cell are sequentially connected; the arrayed wetland microbial fuel cell is a wetland microbial fuel cell stack formed by connecting a plurality of wetland microbial fuel cells; and the cathode and the anode of the wetland microbial fuel cell stack are respectively connected with the corresponding anode and cathode of the electro-Fenton system reaction area through leads.
The plurality of wetland microbial fuel cells are connected with each other, and the wetland microbial fuel cells comprise water paths and circuits.
In the wetland microbial fuel cell pack, wetland microbial fuel cells are arrayed into M rows and N rows, wherein M is more than or equal to 2, N is more than or equal to 2, the wetland microbial fuel cells in the same row are connected in parallel through leads to form wetland microbial fuel cell sub-packs, and all the wetland microbial fuel cell sub-packs are connected in series through leads to form the wetland microbial fuel cell pack. Furthermore, M is more than or equal to 2 and less than or equal to 6, and N is more than or equal to 2 and less than or equal to 6.
Preferably, all the wetland microbial fuel cell sub-groups are connected in series by leads in rows to form the wetland microbial fuel cell stack.
The effluent of the electro-Fenton system reaction zone flows into the arrayed wetland microbial fuel cells through a plurality of water inlet passages, and the number of the wetland microbial fuel cells flowing through each water inlet passage is not more than 12.
Be equipped with the catch basin between nanometer iron carbon micro-electrolysis reaction district and the electro-Fenton reaction district, the bottom in nanometer iron carbon micro-electrolysis reaction district has the water inlet, the top have to the delivery port of drop in the catch basin, the bottom in electro-Fenton reaction district have with the rivers import of catch basin intercommunication.
The nano iron-carbon micro-electrolysis reaction zone comprises a reaction tank body, the reaction tank body is divided into a filler zone and a water inlet zone by a water distribution plate, the filler zone and the water inlet zone are arranged up and down, the water inlet zone is provided with a water inlet, the filler zone is filled with nano iron-carbon micro-electrolysis filler, and the top of the filler zone is provided with an overflow weir.
The invention also provides a sewage treatment method, which comprises the following steps:
(1) introducing the sewage into a nano iron-carbon micro-electrolysis reaction zone for pretreatment;
(2) introducing the pretreated effluent into a reaction zone of an electro-Fenton system for treatment;
(3) and (3) introducing the effluent treated in the step (2) into a wetland microbial fuel cell for degradation, and supplying electric energy generated by the wetland microbial fuel cell to a reaction area of an electro-Fenton system.
In the sewage treatment method, a plurality of wetland microbial fuel cells are arrayed into M rows and N rows, wherein M is more than or equal to 2, N is more than or equal to 2, the wetland microbial fuel cells in the same row are connected in parallel through leads to form wetland microbial fuel cell sub-groups, and all the wetland microbial fuel cell sub-groups are connected in series through leads to form a wetland microbial fuel cell pack.
In the sewage treatment method, the effluent of the electro-Fenton system reaction zone enters the arrayed wetland microbial fuel cells in a multi-point water inlet mode, and the number of the wetland microbial fuel cells flowing through each water path is not more than 12.
In the sewage treatment method, the outlet water of the nano iron-carbon micro-electrolysis reaction zone falls into the reaction zone of the electro-Fenton system, and the water body is oxygenated by adopting a drop aeration mode.
The sewage aimed by the invention is acidic wastewater, and specifically can be wastewater containing acidic dyes, such as weak acid brilliant blue, RAW, acidic anthraquinone blue, acidic red B and the like, and the pH value is between 4 and 6.
Compared with the prior art, the invention has the beneficial effects that:
the invention optimally combines a plurality of technologies of nano iron-carbon micro-electrolysis, electro-Fenton and wetland microbial fuel cells, and highlights the overall effect. Toxic and harmful pollutants in weakly acidic dye wastewater are pretreated through an iron-carbon microelectrolysis-electro-Fenton system combined process, the electricity generation performance of the arrayed wetland microbial fuel cell is enhanced by improving the biodegradability of the wastewater, the electric energy generated by the arrayed wetland microbial fuel cell is utilized to supply power to the electro-Fenton system, the whole device does not need additional energy and chemical agents, the effects of decoloring and removing pollutants are good, and the device is an energy-saving water treatment technology.
Compared with the traditional weakly acidic dye wastewater treatment process, the combined process of the nano iron-carbon micro-electrolysis and the electro-Fenton system enhances the pretreatment effect of the dye wastewater, greatly improves the biochemical performance of the wastewater, and provides Fe for the electro-Fenton system by the nano iron-carbon micro-electrolysis2+The method reduces the problem of filler hardening in the traditional iron-carbon micro-electrolysis. The effluent provides dissolved oxygen through drop aeration and is supplied to the electro-Fenton system, and substances and energy do not need to be provided from the outside in the whole process. The array type wetland microbial fuel cell is utilized to play a deep removing role, and the overall removing effect of the system is better.
The invention carries out series-parallel connection array arrangement on the microbial fuel cells of the constructed wetland, effectively prevents the short circuit of the battery pack by connecting the same row of cells in parallel, and greatly improves the output voltage of the system by connecting a plurality of rows of cells in series. The degradation efficiency of pollutants can be greatly improved by connecting the inlet and outlet water of the battery, and the deep purification effect is obtained.
In the invention, the arrayed wetland microbial fuel cell not only has better pollutant removal effect, but also can generate electric energy.
The system has simple operation and low labor cost, can realize automatic control, and is suitable for treating the wastewater containing the weakly acidic dye.
Drawings
FIG. 1 is a flow chart of the sewage treatment process of the present invention;
FIG. 2 is a schematic structural diagram of an electro-Fenton water treatment system based on power supply of arrayed wetland microbial fuel cells;
FIG. 3 is a schematic diagram illustrating the flow direction of inlet water of the arrayed wetland microbial fuel cell in FIG. 2;
FIG. 4 is a schematic circuit connection diagram of the arrayed wetland microbial fuel cell in FIG. 2;
1-nano iron-carbon micro-electrolysis reaction zone, 101-reaction tank body, 102-water distribution plate, 103-packing zone, 104-water inlet zone, 105-water inlet, 106-overflow weir, 107-barrier plate, 2-electro-Fenton system reaction zone, 201-water flow inlet, 202-three-phase separator, 203-water flow outlet, 204-anode, 205-cathode, 3-array type wetland microbial fuel cell, 301-wetland microbial fuel cell, 302-impermeable layer, 303-anode packing layer, 304-first yellow sand layer, 305-cathode packing layer, 306-wetland plant layer, 308-second yellow sand layer, 4-water collection tank and 5-regulation tank.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will occur to those skilled in the art upon reading the present disclosure and fall within the scope of the appended claims.
Referring to fig. 1, the sewage treatment method of the present invention comprises:
(1) introducing the sewage into a nano iron-carbon micro-electrolysis reaction zone for pretreatment;
(2) introducing the pretreated effluent into a reaction zone of an electro-Fenton system for treatment;
(3) and (3) introducing the effluent treated in the step (2) into a wetland microbial fuel cell for degradation, and supplying electric energy generated by the wetland microbial fuel cell to a reaction area of an electro-Fenton system.
In the step (1), the sewage is weak acidic wastewater, and specifically weak acidic dye wastewater. After the weakly acidic dye wastewater is introduced into the nano iron-carbon micro-electrolysis reaction zone, the dye macromolecules are subjected to primary degradation in the zone, chain scission of macromolecular organic matters and reduction of coloring and coloring groups are realized, so that the biodegradability of the wastewater is improved, the COD and the chromaticity of the wastewater are removed through the adsorption of activated carbon, and the obtained pretreated water is obtained.
In the step (2), the outlet water of the nano iron-carbon micro-electrolysis reaction zone falls into an electro-Fenton system reaction zone (or called as an electro-Fenton reaction zone), and the outlet water is fully contacted with air and mixed with a large amount of oxygen in the falling process, so that the water treatment effect of the electro-Fenton system reaction zone is improved. In weakly acidic dye wastewater pretreated by a nano iron-carbon micro-electrolysis reaction zone, organic matters which are difficult to degrade are partially broken and opened to obtain micromolecular organic matters, and effluent contains Fe generated by reaction2+The anode of the reaction zone of the electro-Fenton system generates Fe2+，O2Electron generation H at the cathode2O2In situ generation of Fe in the reaction zone of the electro-Fenton system2+And H2O2The dye molecules which are difficult to degrade are further subjected to advanced oxidation, meanwhile, the system has the functions of electrode adsorption and electric coagulation to further degrade organic matters to generate micromolecular compounds, and carboxylic acid substances generate CO2And (4) overflowing. At this time, the toxic and harmful macromolecular organic matters are basically changed into organic matters which are easily degraded by microorganisms, and secondary treated water is obtained.
In the step (3), the effluent water obtained in the step (2) contains a large amount of intermediate products of degraded dye molecules and micromolecular organic matters, and the biodegradability of the wastewater is high. And (3) introducing the effluent obtained in the step (2) into a wetland microbial fuel cell for degradation and then discharging, wherein electric energy generated by the wetland microbial fuel cell supplies power to a reaction area of the electro-Fenton system. A large amount of small molecular compounds formed by the iron-carbon micro-electrolysis and electro-Fenton system can be quickly utilized by the electrogenic bacteria, so that the output power of the wetland microbial fuel cell can be greatly improved. In addition, the filtration and interception functions of the wetland can also intercept pollutants. On one hand, the high-density plants planted in the wetland adsorb pollutants in water by utilizing developed root systems of the high-density plants, and meanwhile, the plants generate a large amount of oxygen by utilizing photosynthesis, so that the cathode of the microbial fuel cell is in an oxygen-enriched state, and the electricity generation performance of the microbial fuel cell is improved.
In the invention, a plurality of wetland microbial fuel cells are arrayed into M rows and N rows, wherein M is more than or equal to 2, N is more than or equal to 2, the wetland microbial fuel cells in the same row are connected in parallel through a lead to form a wetland microbial fuel cell sub-group, then all the wetland microbial fuel cell sub-groups are connected in series through leads in a row-isolated manner to form a wetland microbial fuel cell pack, the generated electric energy is supplied to a reaction zone of an electro-Fenton system, the voltage of the electro-Fenton system is increased, and a virtuous cycle is formed.
The effluent of the electro-Fenton system reaction area enters the arrayed wetland microbial fuel cells through a plurality of water paths, and the number of the wetland microbial fuel cells flowing through each water path is not more than 12, so that the power generation performance of the wetland microbial fuel cells is ensured.
As shown in fig. 2, the electro-fenton water treatment system based on power supply of arrayed wetland microbial fuel cells of the invention comprises:
a nano iron-carbon micro-electrolysis reaction zone 1 for pretreating sewage;
an electro-Fenton system reaction area 2 for treating the outlet water of the nano iron-carbon micro-electrolysis reaction area;
the array-type wetland microbial fuel cell 3 is used for treating the effluent of the reaction zone of the electro-Fenton system and supplying power to the effluent;
the water collecting tank 4 is arranged between the nano iron-carbon micro-electrolysis reaction zone 1 and the electro-Fenton system reaction zone 2;
and the regulating tank 5 is arranged between the electro-Fenton system reaction zone 2 and the arrayed wetland microbial fuel cell 3.
The nano iron-carbon micro-electrolysis reaction zone 1 comprises a reaction tank body 101, the reaction tank body 101 is internally divided into a filler zone 103 and a water inlet zone 104 which are arranged up and down through a water distribution plate 102, and the water distribution plate can enable water flow to be more uniform. The side wall of the water inlet area 104 is provided with a water inlet 105, the filler area is filled with nano iron-carbon micro-electrolysis microspheres, and the nano iron-carbon micro-electrolysis microspheres can be prepared by adopting products in the prior art, generally, the mass ratio of iron powder to carbon powder is 1:1 and fixing the nano iron-carbon micro-electrolysis microspheres in bentonite for reaction. The top of the packing section 103 is provided with a weir 106. The effluent water treated in the nano iron-carbon micro-electrolysis reaction zone 1 is discharged through overflow of the overflow weir and falls into the water collecting tank 4. In order to prevent the loss of the filler, a barrier plate 107 with holes is arranged above the filler in the filler area (the barrier plate is provided with micropores, and the diameter of the micropores is smaller than that of the filter material).
In the present invention, the reaction zone 2 of the electro-Fenton system adopts the existing structure, such as but not limited to one of the following alternative structures: the lower side wall of the electro-Fenton system reaction zone 2 is provided with a water inlet 201, and the water inlet 201 is communicated with the water collecting tank 4. The top of the reaction area 2 of the electro-Fenton system is provided with a three-phase separator 202 adjacent to the water outlet position, which facilitates the separation of gas, liquid and solid phases, and the separated liquid water overflows through a water outlet 203 arranged at the top of the reaction area 2 of the electro-Fenton system. An anode 204 of the electro-Fenton system reaction area 2 is a stainless steel net, a cathode 205 is a carbon felt, and the current of the electro-Fenton system is controlled to be 0.5-1.2 mA. The water treated in the reaction zone 2 of the electro-Fenton system falls into the regulating reservoir 5 through the water outlet 203.
The arrayed wetland microbial fuel cells 3 (or arrayed artificial wetland microbial fuel cells) are wetland microbial fuel cell stacks formed by connecting a plurality of wetland microbial fuel cells 301. The single wetland microbial fuel cell (or artificial wetland microbial fuel cell) in the wetland microbial fuel cell stack adopts the existing structure, such as but not limited to one of the selectable structures: the wetland microbial fuel cell 301 is sequentially provided with an impermeable layer 302, a first yellow sand layer 304, an anode filler layer (filled with activated carbon) 303, a second yellow sand layer 308, a cathode filler layer (filled with activated carbon) 305 and a wetland plant layer (planted with plants with developed root systems such as canna or reed) from bottom to top, wherein the planting density reaches 25-30 plants/m2)306, connecting the cathode and the anode with external leads and carrying out insulation treatment. WetThe microbial fuel cell utilizes the anaerobic environment of the lower layer of the artificial wetland, adds activated carbon to form an anode material, and utilizes oxygen secreted by the root system of the plant and the activated carbon to form a cathode material. The water inlet of each microbial fuel cell is positioned on the first yellow sand layer, and the water outlet of each microbial fuel cell is positioned on the cathode filler layer at the top of the right side.
In the wetland microbial fuel cell pack, the wetland microbial fuel cells are arrayed into M rows and N rows, wherein M is more than or equal to 2, and N is more than or equal to 2. For circuit connection, wetland microbial fuel cells in the same row are connected in parallel through leads to form wetland microbial fuel cell sub-groups, all the wetland microbial fuel cell sub-groups are connected in series through leads, and when the wetland microbial fuel cell sub-groups are connected in series, all the wetland microbial fuel cell sub-groups are connected through leads in a row-isolated series connection mode to form the wetland microbial fuel cell pack. And the cathode and the anode of the wetland microbial fuel cell stack are respectively connected with the anode and the cathode of the corresponding electro-Fenton system reaction area through leads. For the water path connection, the outlet water of the electro-Fenton system reaction area enters the arrayed wetland microbial fuel cells through a plurality of water inlet passages, namely, the outlet water flows through the arrayed wetland microbial fuel cells through a plurality of water paths, and the number of the wetland microbial fuel cells flowing through each water inlet pipe is not more than 12.
Specifically, a wetland microbial fuel cell stack in a 6 × 4 array is taken as an example for specific description, fig. 3 shows a specific array mode and an inlet water flow direction, the wetland microbial fuel cell stack is arranged in 6 rows, which are A, B, C, D, E, F respectively, and 4 wetland microbial fuel cells are arranged in each row. And water in the regulating reservoir enters the arrayed microbial fuel cells through two water inlet points, one of the water inlet points is positioned in the wetland microbial fuel cell A1, the inlet water sequentially flows into each wetland microbial fuel cell along the S shape and finally flows out of the wetland microbial fuel cell C4, the other water inlet point is positioned in the wetland microbial fuel cell F1, and the inlet water sequentially flows into each wetland microbial fuel cell and then flows out of the wetland microbial fuel cell D4. Fig. 4 shows a specific circuit connection mode, the wetland microbial fuel cells in the same row are connected in parallel through conducting wires to form a wetland microbial fuel cell subgroup, namely a1, a2, A3, a4 and a5 are connected in parallel to form a subgroup a, B1, B2, B3, B4 and B5 are connected in parallel to form a subgroup B, and the like for … …. And then all the wetland microbial fuel cell sub-groups are connected by leads in a manner of row-by-row serial connection, namely A, C, E, B, D, F sub-groups are sequentially connected to form a wetland microbial fuel cell group.
When the system is operated, sewage (such as weakly acidic dye wastewater) enters a water inlet area 104 of the nano iron-carbon micro-electrolysis reaction area through a water inlet 105, the sewage enters a filler area through a water distribution plate, the sewage is discharged through an overflow weir after being pretreated in the filler area 103 and falls into a water collecting tank 4, and the retention time of the sewage in the nano iron-carbon micro-electrolysis reaction area is 2-3 h. The water in the water collecting tank 4 enters the reaction area of the electro-Fenton system through the water flow inlet 201 for treatment, the retention time in the reaction area is 2-3h, the water treated in the reaction area of the electro-Fenton system flows into the regulating tank through the water flow outlet 203, and the regulating tank can enable the water inflow in the next step to be more uniform. And water in the regulating tank flows into the arrayed wetland microbial fuel cell and stays for 24-36 h, the discharged water contains dye intermediates and a large number of small molecular compounds which are removed under the combined action of wetland filler-microorganism-plant-electrochemistry, and electric energy generated by the arrayed wetland microbial fuel cell is supplied to a reaction zone of the electro-Fenton system.
Claims (5)
1. The utility model provides an electro-Fenton sewage treatment system based on arrange array type wetland microbial fuel cell power supply which characterized in that includes:
a nano iron-carbon micro-electrolysis reaction zone (1) for pretreating sewage;
an electro-Fenton system reaction area (2) used for treating the outlet water of the nano iron-carbon micro-electrolysis reaction area;
the array-type wetland microbial fuel cell (3) is used for treating the effluent of the reaction zone of the electro-Fenton system and supplying power to the effluent;
the nano iron-carbon micro-electrolysis reaction zone, the electro-Fenton reaction zone and the arrayed wetland microbial fuel cell are sequentially connected; the arrayed wetland microbial fuel cell is a wetland microbial fuel cell stack formed by connecting a plurality of wetland microbial fuel cells (301); in the wetland microbial fuel cell pack, wetland microbial fuel cells are arrayed into M rows and N rows, wherein M is more than or equal to 2, N is more than or equal to 2, the wetland microbial fuel cells in the same row are connected in parallel through leads to form wetland microbial fuel cell sub-packs, and all the wetland microbial fuel cell sub-packs are connected in series through leads to form the wetland microbial fuel cell pack; connecting all wetland microbial fuel cell sub-sets by using wires in a manner of row-by-row series connection to form the wetland microbial fuel cell stack; the cathode and the anode of the wetland microbial fuel cell pack are respectively connected with the corresponding anode and the corresponding cathode of the electro-Fenton system reaction area through leads, the effluent of the electro-Fenton system reaction area flows into the arrayed wetland microbial fuel cells through a plurality of water inlet passages, and the number of the wetland microbial fuel cells flowing through each water inlet passage is not more than 12.
2. The arrayed wetland microbial fuel cell power supply-based electro-Fenton sewage treatment system according to claim 1, wherein a water collecting tank (4) is arranged between the nano iron-carbon micro-electrolysis reaction zone (1) and the electro-Fenton reaction zone (2), the bottom of the nano iron-carbon micro-electrolysis reaction zone is provided with a water inlet (105), the top of the nano iron-carbon micro-electrolysis reaction zone is provided with a water outlet for water falling in the water collecting tank, and the bottom of the electro-Fenton reaction zone is provided with a water flow inlet (201) communicated with the water collecting tank.
3. The electro-Fenton sewage treatment system based on power supply of the arrayed wetland microbial fuel cells according to claim 2, wherein the nano iron-carbon micro-electrolysis reaction zone comprises a reaction tank body (101), the reaction tank body is divided into a packing zone (103) and a water inlet zone (104) which are arranged up and down through a water distribution plate (102), the water inlet zone is provided with a water inlet (105), the packing zone is filled with nano iron-carbon micro-electrolysis packing, and the top of the packing zone is provided with an overflow weir (106).
4. A method of treating wastewater, comprising:
(1) introducing the sewage into a nano iron-carbon micro-electrolysis reaction zone for pretreatment;
(2) introducing the pretreated effluent into a reaction zone of an electro-Fenton system for treatment;
(3) introducing the effluent treated in the step (2) into an arrayed wetland microbial fuel cell for degradation, wherein electric energy generated by the wetland microbial fuel cell is supplied to a reaction area of an electro-Fenton system;
the arrayed wetland microbial fuel cells consist of a plurality of wetland microbial fuel cells, the wetland microbial fuel cells are arrayed into M rows and N columns, wherein M is more than or equal to 2, N is more than or equal to 2, the wetland microbial fuel cells in the same row are connected in parallel through leads to form wetland microbial fuel cell sub-groups, and all the wetland microbial fuel cell sub-groups are connected in series through leads to form a wetland microbial fuel cell pack; effluent of the electro-Fenton system reaction zone enters the arrayed wetland microbial fuel cells in a multi-point water inlet mode, and the number of the wetland microbial fuel cells flowing through each water channel is not more than 12.
5. The sewage treatment method according to claim 4, wherein the outlet water of the nano iron-carbon micro-electrolysis reaction zone falls into the electro-Fenton system reaction zone, and the water body is oxygenated by adopting a drop aeration mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611240733.8A CN106746230B (en) | 2016-12-29 | 2016-12-29 | electro-Fenton sewage treatment system and method based on power supply of arrayed wetland microbial fuel cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611240733.8A CN106746230B (en) | 2016-12-29 | 2016-12-29 | electro-Fenton sewage treatment system and method based on power supply of arrayed wetland microbial fuel cells |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106746230A CN106746230A (en) | 2017-05-31 |
| CN106746230B true CN106746230B (en) | 2020-06-16 |
Family
ID=58923377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611240733.8A Active CN106746230B (en) | 2016-12-29 | 2016-12-29 | electro-Fenton sewage treatment system and method based on power supply of arrayed wetland microbial fuel cells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106746230B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2029218A (en) * | 2021-08-17 | 2021-11-09 | Univ North China Science & Technology | Apparatus for advanced treatment of slightly polluted water |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108751381A (en) * | 2018-06-27 | 2018-11-06 | 海安常达环保科技有限公司 | The method of Zero-valent Iron reduction coupling microbiological fuel cell degrading azoic dye waste water |
| CN109516645B (en) * | 2018-12-21 | 2020-06-09 | 江南大学 | Water treatment device and application thereof |
| CN110357245B (en) * | 2019-07-31 | 2022-01-04 | 华北理工大学 | Iron-carbon micro-electrolysis-microbial fuel cell-constructed wetland composite device for treating pesticide wastewater |
| CN111003868B (en) * | 2019-12-25 | 2022-04-19 | 广州市环境保护工程设计院有限公司 | Treatment process for degradation-resistant wastewater |
| CN113471501B (en) * | 2021-06-28 | 2022-07-08 | 太原理工大学 | Series continuous flow microbial fuel cell system, preparation method thereof and application thereof in degrading nitrobenzene wastewater |
| CN114920429B (en) * | 2022-06-14 | 2023-08-04 | 安徽工程大学 | Pigment effluent treatment plant of MFC coupling electricity Fenton |
| CN116253475A (en) * | 2023-03-31 | 2023-06-13 | 南京工业大学 | electro-Fenton sewage treatment system and application thereof |
| CN117401859B (en) * | 2023-11-24 | 2024-04-05 | 江苏龙腾工程设计股份有限公司 | Energy-saving carbon-reduction village and town sewage treatment system |
| CN117645367A (en) * | 2023-12-31 | 2024-03-05 | 南京师范大学 | Electrochemical redox coupling electricity generation type constructed wetland system, application and use method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704596A (en) * | 2009-11-19 | 2010-05-12 | 杨忠刚 | Method for oxidation treatment of sewage by novel Fe-C microelectrolysis-Fenton reagent |
| CN102249423A (en) * | 2011-07-13 | 2011-11-23 | 东南大学 | Structure for simultaneously realizing ecological sewage treatment and microbiological fuel cell electrogenesis |
| CN103739161A (en) * | 2013-12-26 | 2014-04-23 | 江南大学 | Low-energy-consumption degradation-resistant organic wastewater recycling method |
| CN203967186U (en) * | 2014-07-30 | 2014-11-26 | 中科宇图天下科技有限公司 | There is the microbiological fuel cell group of automatic protection functions |
| CN104478073A (en) * | 2014-12-10 | 2015-04-01 | 广西师范大学 | Device for treating industrial wastewater difficult to biodegrade by virtue of ABR-bioelectric Fenton coupling technique |
| CN105024089A (en) * | 2015-06-15 | 2015-11-04 | 中国科学院广州能源研究所 | Microbial fuel cell artificial wetland device for sewage treatment and power supply to wetland |
| TWI520427B (en) * | 2014-12-09 | 2016-02-01 | 王金燦 | Microbial fuel cell with calcined zinc oxide photocatalyst |
| CN105461135A (en) * | 2015-12-01 | 2016-04-06 | 湖南永清环保研究院有限责任公司 | Pretreatment technology for high-concentration refractory organic petrochemical wastewater |
-
2016
- 2016-12-29 CN CN201611240733.8A patent/CN106746230B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101704596A (en) * | 2009-11-19 | 2010-05-12 | 杨忠刚 | Method for oxidation treatment of sewage by novel Fe-C microelectrolysis-Fenton reagent |
| CN102249423A (en) * | 2011-07-13 | 2011-11-23 | 东南大学 | Structure for simultaneously realizing ecological sewage treatment and microbiological fuel cell electrogenesis |
| CN103739161A (en) * | 2013-12-26 | 2014-04-23 | 江南大学 | Low-energy-consumption degradation-resistant organic wastewater recycling method |
| CN203967186U (en) * | 2014-07-30 | 2014-11-26 | 中科宇图天下科技有限公司 | There is the microbiological fuel cell group of automatic protection functions |
| TWI520427B (en) * | 2014-12-09 | 2016-02-01 | 王金燦 | Microbial fuel cell with calcined zinc oxide photocatalyst |
| CN104478073A (en) * | 2014-12-10 | 2015-04-01 | 广西师范大学 | Device for treating industrial wastewater difficult to biodegrade by virtue of ABR-bioelectric Fenton coupling technique |
| CN105024089A (en) * | 2015-06-15 | 2015-11-04 | 中国科学院广州能源研究所 | Microbial fuel cell artificial wetland device for sewage treatment and power supply to wetland |
| CN105461135A (en) * | 2015-12-01 | 2016-04-06 | 湖南永清环保研究院有限责任公司 | Pretreatment technology for high-concentration refractory organic petrochemical wastewater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2029218A (en) * | 2021-08-17 | 2021-11-09 | Univ North China Science & Technology | Apparatus for advanced treatment of slightly polluted water |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106746230A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106746230B (en) | electro-Fenton sewage treatment system and method based on power supply of arrayed wetland microbial fuel cells | |
| He et al. | Advances in microbial fuel cells for wastewater treatment | |
| Zhao et al. | Preliminary investigation of constructed wetland incorporating microbial fuel cell: batch and continuous flow trials | |
| JP5873085B2 (en) | Bio-electrochemical system for treating wastewater and method for treating acid gas | |
| CN104505529B (en) | The collaborative environmental microbiological fuel cell of phycomycete and the method utilizing its water purification to produce electricity | |
| CN105217796B (en) | A kind of method and device of downward vertical artificial wetland coupling microorganism electrolysis cell strengthened denitrification | |
| CN110143720A (en) | A kind of the artificial swamp microbiological fuel cell coupling device and its wastewater treatment method of multimedium filtrate | |
| CN108275776B (en) | Anaerobic fluidized bed serial constructed wetland type microbial fuel cell device and method | |
| CN110357245B (en) | Iron-carbon micro-electrolysis-microbial fuel cell-constructed wetland composite device for treating pesticide wastewater | |
| CN105355950B (en) | A kind of macro-organism cathode microbial fuel cell stack device | |
| CN104600345B (en) | Continuous-flow anaerobic biological cathode microbial fuel cell | |
| CN105859024A (en) | Ag3PO4 photocatalysis and artificial wetland microbial battery coupling system and application thereof | |
| CN109231469B (en) | Solar energy aquatic body ecological remediation floats bed system | |
| CN102557330A (en) | An/O type composite artificial wetland system for enhanced treatment of low-C/N ratio wastewater | |
| CN108483619A (en) | Strengthen the method and device of downward vertical artificial wetland denitrification efficiency using sewage electricity production in a kind of original position | |
| CN106848360A (en) | A kind of three anodes share list cathode type denitrification microorganism fuel cell | |
| CN106986460A (en) | The bioelectrochemistry wastewater treatment equipment and method of wastewater treatment of a kind of highly integrated reverse-flow type | |
| Sun et al. | A horizontal plug-flow baffled bioelectrocatalyzed reactor for the reductive decolorization of Alizarin Yellow R | |
| CN102249409B (en) | Device and method for strengthening treatment of anaerobic sewage by using solar energy | |
| CN106587501A (en) | Treatment method for garbage leachate | |
| CN108751381A (en) | The method of Zero-valent Iron reduction coupling microbiological fuel cell degrading azoic dye waste water | |
| CN109110911A (en) | A kind of drawer type biofilter coupling microbiological fuel cell composite system | |
| CN104577171A (en) | Efficient dephosphorization and nitrification microbial fuel cell with external magnetic field | |
| CN109867420B (en) | Integrated microbial desalination cell-constructed wetland device | |
| CN106927577A (en) | A kind of ecological water purifying device and its method for administering black and odorous water |
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 |