99 results about "Microbial fuel cell" patented technology

The invention belongs to the technical field of new energy materials and bioelectrochemistry, and particularly relates to an iron-based multi-metal sulfide composite carbon anode material and a preparation method of the iron-based multi-metal sulfide composite carbon anode material. The preparation method is simple in process flow, convenient to operate, easy for large-scale production, wide in raw material source, low in cost and environment-friendly, and can be used for preparing the three-dimensional porous carbon matrix which is formed by foaming and carbonizing polyvinylpyrrolidone and is provided with interconnected carbon nanosheets. Through reasonable composition design and structural regulation, and optimization of metal ratio and vulcanization conditions, accurate regulation of material performance can be realized, electrochemical performance and biocompatibility are significantly improved, electricity generation performance and operation stability of a microbial fuel cell are improved, and good industrial application prospects are achieved.

The present application belongs to the technical field of water pollution treatment, and particularly relates to a kind of constructed wetland coupled microbial fuel cell and a kind of water pollution treatment method.The modified iron-carbon material in the present application can reduce the inhibitory effect of antibiotics on device electricity generation, well maintain the activity of electricity-generating bacteria, and maintain stable electricity generation of the system;The modified iron-carbon material in the present application not only has efficient electron transport capacity, strengthens electron transfer, but also has a large number of active adsorption sites, can effectively remove ofloxacin, and is helpful for denitrification;At the same time, the surface area of the modified iron-carbon material is huge, and the surface is loaded with Fe, which can improve the removal capacity of phosphorus.The present application realizes efficient degradation of ofloxacin and conventional pollutants by reasonably constructing a constructed wetland coupled microbial fuel cell, and has higher electricity generation performance.

This invention provides a fluidized bed multi-stage anaerobic process synergistic wastewater treatment and energy recovery system, belonging to the field of wastewater treatment and energy recovery. The system includes a pretreatment module for synergistic wastewater treatment via ultrasonic crushing and enzymatic hydrolysis, a dark fermentation module, an anaerobic digestion module, a microbial fuel cell module, a gas collection module for collecting gases generated by each module, an electrical energy regulation module for applying electrical energy generated by the microbial fuel cell to the dark fermentation and anaerobic digestion modules to form a non-uniform potential field, and a comprehensive regulation module for receiving detection signals and regulating the gas supply. The discharge end of the dark fermentation module is connected to the feed ends of both the anaerobic digestion and microbial fuel cell modules, forming two series paths: dark fermentation-anaerobic digestion-microbial fuel cell and dark fermentation-microbial fuel cell-anaerobic digestion. This invention achieves deep purification of wastewater and synergistic recovery of multiple forms of energy, including hydrogen, methane, and electricity.

This invention provides a photovoltaic-powered microbial fuel cell constructed wetland system, relating to the field of water pollution control. The system consists of a photovoltaic power supply module, a pulse modulation unit, a mode switching unit, a microbial fuel cell constructed wetland body, an auxiliary anode module, and an electrically isolated stimulation electrode pair. Through photovoltaic power supply and low duty cycle intermittent constant current pulse modulation, it can maintain stable operation for more than 72 hours under no-light conditions. Relying on the time-sharing pulse output of the mode switching unit, electrochemical oxidation of recalcitrant organic matter is achieved through the auxiliary anode. The electroisolated electrode pair stimulates the metabolism of electrogenic bacteria with a non-contact alternating electric field, solving the problems of unstable power supply and difficulty in balancing oxidation efficiency and bacterial activity in off-grid scenarios, thus improving wastewater treatment efficiency and long-term operational stability of the system.

This invention discloses an anti-clogging biofiltration device coupled with a microbial fuel cell, applied in the field of biofiltration technology. It includes: a biofilter consisting of a porous media coarse filter layer, a cathode region, and an anode region arranged sequentially from top to bottom; a Helmholtz coil array deployed around the biofilter; and an external circuit that, together with the anode and cathode regions, constitutes the microbial fuel cell. The microbial fuel cell provides self-sufficient power to the cathode region, anode region, and Helmholtz coil array for anti-clogging biofiltration. This invention effectively solves the problems of accumulated clogging in EPS (expanded power filters) and the inability to clean the bottom filter media, and realizes self-generated electricity for the microbial fuel cell.

The invention aims to overcome the defects of a traditional microbial fuel cell (MFC), and provides a built-in biological carrier cage tube type microbial fuel cell device, namely a novel microbial fuel cell device in which a tubular reactor is coupled with the MFC. The built-in mesh cage type device is filled with macroporous adsorption resin serving as a biological carrier, when wastewater passes through, a biological membrane is formed on the surface of the built-in mesh cage type device so as to degrade organic pollutants and generate electrons and protons, the electrons are collected by a current collector and then flow to a cathode to form current, and the protons are transmitted to the cathode to be subjected to reduction reaction. The device structure main body can be formed by connecting a plurality of single-tube type MFC reactor units in series or in parallel, the device structure main body can be flexibly adjusted according to the actual application scale, and the parallel combination adopts U-shaped joints for connection. A single MFC unit has a specific structure and has a unique design of separation of an anode, a cathode and a carrier cage, and a biological carrier, namely macroporous adsorption resin, is stored in the carrier cage. Flanges are mounted at the head and tail of the MFC, so that maintenance operation is facilitated. According to the design, a plug flow reactor model is adopted, high efficiency and accuracy are ensured, accurate control and optimization of the reaction process are realized, the sewage treatment efficiency and effect are improved, and more thorough purification treatment and energy recovery are realized.

The present application relates to the field of environmental management technology, and discloses a kind of emergent aquatic plant-sediment microbial fuel cell synchronous remediation water body method, comprising the following steps: S1, constructs emergent aquatic plant-SMFC coupling system, emergent aquatic plant-SMFC coupling system includes emergent aquatic plant and SMFC, SMFC includes anode electrode, modified cathode electrode and external resistance;Emergent aquatic plant is planted around anode electrode, so that anode electrode is contacted with bottom mud;S2, preparation modified cathode electrode, and the catalytic activity of cathode electrode is enhanced by electrochemical oxidation modification;S3, domestication electric active microorganism, emergent aquatic plant-SMFC coupling system is placed in room temperature domestication, and the electricity generation capacity of anode electrode is improved by introducing bottom mud rich in organic matter or exogenous inoculation microorganism;S4, start and run system, and the concentration change of chlorophyll a, ammonia nitrogen, total nitrogen and total phosphorus in water body is monitored in real time.The present application provides a kind of green, economic and efficient algal bloom water remediation technology, and is suitable for the ecological management of algal bloom water.

The utility model belongs to the technical field of new energy and green low carbon, and particularly relates to a microbial fuel cell for generating electric energy by utilizing soil, which comprises an anode electrode, a cathode electrode, a gas exchange membrane, a circular folding cover, a square folding cover, a gas chamber and a protective cover, the gas chamber is fixedly mounted on the top surface of the circular folding cover, the gas exchange membrane and the cathode electrode are respectively and sequentially arranged in the gas chamber, the square folding cover is arranged in the gas chamber, and the protective cover is buckled at the top end of the gas chamber. The utility model has the advantage that the microbial fuel cell provides power for the underground sensor used in precision agriculture and green infrastructure so as to prevent environmental threat caused by the use of the traditional cell.

The application discloses a modified anode for a marine sediment microbial fuel cell and a preparation method of the modified anode and the marine sediment microbial fuel cell, and the preparation method comprises the following steps: S1, obtaining a primary anode; S2, nitrogen is introduced into a first PBS buffer solution to perform nitrogen exposure treatment, and dopamine hydrochloride is added to obtain a first electrolyte; S3, the primary anode is immersed into the first electrolyte, and electro-deposition is performed on the primary anode by a first cyclic voltammetry scanning method to obtain a PDA modified anode; S4, Fe3O4 powder is added into a second PBS buffer solution to obtain a second electrolyte; and S5, the PDA modified anode is immersed into the second electrolyte, and electro-deposition is performed on the PDA modified anode by a second cyclic voltammetry scanning method to obtain a PDA / Fe3O4 modified anode. The PDA / Fe3O4 composite is used to modify the anode, the electrochemical performance of the anode is improved, and a proper amount of amino acid is added into the sediment, so that the organic matter conversion and electron transmission efficiency of the microbial fuel cell are improved, and the electricity generation performance of the microbial fuel cell is improved.

The invention discloses a Fe-N-C-at-MXene composite material, a synthesis method thereof and an application of the Fe-N-C-at-MXene composite material in a microbial fuel cell. According to the method, an in-situ growth strategy is adopted, MIL-101 (Fe) is constructed on the surface of single-layer Ti < 3 > C < 2 > T < x > MXene, an MIL-101 (Fe)-MXene composite material with good interface bonding is formed, melamine is introduced as a nitrogen source, synergistic nitrogen doping and carbonization are achieved through high-temperature pyrolysis, and the Fe-N-C-MXene composite material with the high specific surface area and rich active sites is constructed. The Fe-N-C-at-MXene composite material disclosed by the invention not only has excellent conductivity and structural stability, but also has a hierarchical pore channel and a high-density electrocatalytic active center, so that oxygen diffusion and interface reaction kinetics are effectively promoted. In an MFC performance test, as a cathode catalyst, the cathode catalyst remarkably improves the output voltage and the maximum power density of the battery, exceeds a commercial Pt / C catalyst, and shows a wide application prospect.

The utility model discloses a sulfur autotrophic denitrification filter material reinforced constructed wetland microbial fuel cell sewage treatment system which comprises a container main body, the container main body sequentially comprises a gravel water distribution layer, a granular activated carbon anode layer, a sulfur autotrophic denitrification filter material layer, a middle gravel layer, a granular activated carbon cathode layer and a wetland plant layer from bottom to top, anodes are embedded in the granular activated carbon anode layer, cathodes are embedded in the granular activated carbon cathode layer, and the wetland plant layer is arranged in the middle gravel layer. A lead penetrates through the granular activated carbon anode layer and the granular activated carbon cathode layer to connect the anode with the cathode, a water inlet is formed in the gravel water distribution layer, and a water outlet is formed in the wetland plant layer. According to the utility model, the constructed wetland microbial fuel cell and the sulfur autotrophic denitrification technology are combined, so that the dual effects of pollutant removal and electricity generation are realized, a new idea is provided for the combination of the constructed wetland microbial fuel cell and the sulfur autotrophic denitrification technology, and meanwhile, a new direction is provided for the removal of river sewage.

This invention discloses a method for preparing an oxygen reduction catalyst composed of a nickel-cobalt-aluminum layered double hydroxide and a two-dimensional transition metal carbide, comprising the following steps: preparing a nickel-cobalt-aluminum layered double hydroxide and a two-dimensional transition metal carbide; attaching the nickel-cobalt-aluminum layered double hydroxide to the two-dimensional transition metal carbide, thereby successfully preparing the nickel-cobalt-aluminum layered double hydroxide combined with the two-dimensional transition metal carbide, and disclosing its application as a cathode catalyst for microbial fuel cells. The material prepared by this invention has high porosity, numerous reaction sites, good electrochemical stability, and high conductivity. Therefore, as a cathode catalyst for microbial fuel cells, it improves the efficiency of ion flow, ensures the stability of electrode cycling and power generation efficiency, thereby improving the performance of microbial fuel cells.

The invention discloses a microbial fuel cell based on bacillus pasteurii as well as a construction method and application thereof, and relates to the technical field of biological fuel cells. The microbial fuel cell comprises a single-chamber reactor, an anode, a cathode and a wire, the cathode is positioned on the upper layer of the single chamber of the single-chamber reactor and is in contact with air; the anode is positioned at the single-chamber bottom layer of the single-chamber reactor; the lead is connected with the anode and the cathode; a cavity of the single-chamber reactor is filled with soil or an electrolyte solution; the surface of the anode is loaded with a bacillus pasteurii biological membrane; the bottom layer of a single chamber of the single-chamber reactor is loaded with a urea-containing culture medium. The microbial fuel cell provided by the invention can realize collaborative implementation of soil heavy metal remediation and electric energy recovery, and has the advantages of simple preparation process, stable electricity generation performance, high heavy metal removal efficiency, wide application range and the like.

The application discloses a novel bio-photoelectric coupling device, which comprises a shell, a water inlet formed in the bottom of the shell, and a water outlet formed in the top of the shell; an artificial wetland unit, which comprises a shunt layer and an intermediate substrate layer sequentially laid in the shell from bottom to top, and plants planted in the intermediate substrate layer; the water inlet is located at the bottom of one side of the shunt layer; a microbial fuel cell unit, which comprises an anode layer and a cathode layer, and the anode layer and the cathode layer are electrically connected through an external circuit, the anode layer is located between the shunt layer and the intermediate substrate layer, the cathode layer is located above the intermediate substrate layer, the top of the plants penetrates through the cathode layer and extends out of the shell, and the water outlet is located above the cathode layer. The coupling of the microbial fuel cell unit and the artificial wetland unit can not only remove common pollutants, but also remove composite pollutants such as antibiotics and heavy metal substances, improve the pollutant removal capacity, and realize more economical input and output.

The invention discloses a floating island type microbial fuel cell sensor for monitoring a water pollution event on line, and belongs to the technical field of environmental protection. The sensor comprises a sinking bucket, a floating island, a support frame, an anode, a cathode, an external resistor, a data collector, a solar panel and a monitoring terminal. According to the sensor, the anode is buried in the soil in the sinking bucket, and the sinking bucket is suspended below the floating island, so that the sensor does not need to submerge into the bottom of the wetland to embed the anode, and is suitable for monitoring the deep wetland; the device is provided with a data collector and a solar panel, so that electric signal data can be transmitted to a computer and a mobile phone terminal online in real time; by introducing a machine learning algorithm, a nonlinear mapping model between the output voltage signal of the microbial fuel cell and the pH value of the water body is established, so that the monitoring terminal can intelligently analyze the voltage data acquired in real time, thereby realizing high-precision, continuous and online monitoring of the pH value of the water body.

The invention provides a complex microbial inoculant and application thereof in degradation of starch and biofuel cells, and belongs to the cross technical field of environmental biotechnology and bioelectrochemistry. According to the invention, a complex microbial inoculant composed of three microorganisms is constructed through a synthetic biological strategy; the complex microbial inoculant comprises genetically engineered Escherichia coli capable of rapidly converting starch into monosaccharide easy to use, shewanella for bearing upstream metabolites and geobacter for generating electricity, wherein the genetically engineered Escherichia coli is used for rapidly converting starch into monosaccharide easy to use; according to the invention, through precise function division of three strains, a complex degradation and power generation process is decomposed into a plurality of sub-steps catalyzed by special strains, so that an efficient'metabolic assembly line 'is formed, the inhibition of intermediate products is reduced, and the overall energy conversion efficiency is improved; the complex microbial inoculant can be used for degrading starch and preparing microbial fuel cells, realizes wastewater purification and recovery of bioelectric energy at the same time, and has remarkable environmental and economic benefits.

The invention discloses a method for preparing a flexible porous carbon nanofiber micro-fuel cell cathode material through electrostatic spinning. The method comprises the following steps: firstly, uniformly mixing carbon nanotubes and polytetrafluoroethylene dispersion liquid; dissolving polyvinyl alcohol in water, and adding the boric acid solution into the polyvinyl alcohol aqueous solution; mixing the two solutions to obtain an electrostatic spinning precursor solution, and carrying out spinning treatment; the preparation method comprises the following steps: preparing a polymer fiber material, drying, pre-oxidizing to be brown, and carbonizing the pre-oxidized polymer fiber material to obtain the flexible porous carbon nanofiber micro-fuel cell cathode material. The microbial fuel cell constructed on the basis of the flexible porous carbon nanofiber micro-fuel cell cathode material has relatively high cathode oxygen reduction performance, relatively high power output density and long cycle stability, and is expected to be put into practical application in the aspects of sewage treatment and energy recovery.

The invention provides an iron electrolysis coupled phycomycete microbial fuel cell, a preparation method and application thereof, and a wastewater treatment method, and belongs to the technical field of wastewater treatment. The IE-MFC comprises an anode chamber, a cathode chamber and an iron electrolysis chamber which are sequentially arranged, the anode chamber and the cathode chamber are separated by a proton exchange membrane, the cathode chamber and the iron electrolysis chamber are separated by a cation exchange membrane, and an anaerobic microbial membrane is fixed on the surface of an anode; and the surface of the cathode is fixed with coleus. An iron electrolysis and phycomycete symbiotic system is introduced, the metabolic activity of microorganisms can be stimulated and strengthened through a micro electric field generated inside, the biological metabolism of phycomycetes and the synergistic effect of the electric field of the phycomycetes decompose sulfamethoxazole, and meanwhile ferrous ions are generated in situ through iron electrolysis; and oxygen generated by photosynthesis of the coleus in the cathode region is triggered to generate hydroxyl free radicals with strong oxidizing property, so that mineralization of refractory intermediate products is realized, and a'biodegradation-micro electric field-iron electrolysis' three-synergistic degradation mechanism is formed.

The application relates to the technical field of water treatment, and specifically discloses a microalgae filter bed coupled microbial fuel cell system and a method for treating sewage and controlling ARGs propagation. The microalgae filter bed coupled microbial fuel cell system comprises a body, an anaerobic zone arranged in the body, and the anaerobic zone comprises, in sequence, an anode electrode arranged on one side of a first activated carbon layer and inoculated with an anode microalgae; and an aerobic zone arranged in the body and arranged in sequence with the aerobic zone along the height direction of the body, the aerobic zone comprising, in sequence, a cathode electrode arranged on one side of a second activated carbon layer and inoculated with a cathode microalgae, and the cathode electrode is electrically connected with the anode electrode; and the anode microalgae and the cathode microalgae are both selected from eukaryotic microalgae. The system can be used in water treatment, and has the advantages of simple structure, flexible operation, rapid start, no need for aeration, stable operation, low cost and the like.

The utility model belongs to the technical field of sewage treatment, and relates to a Fenton sludge biochar artificial wetland coupling microbial fuel cell, which comprises a container main body, the container main body is in a cylindrical barrel shape, Fenton sludge biochar is filled in the barrel to enhance sewage treatment and microbial attachment effects, a water sampling port is arranged on the wall of the barrel, and a water sampling port is arranged on the wall of the barrel. A water outlet is formed in the bottom of the barrel, a water inlet is formed in the top of the barrel, a large gravel layer, a medium gravel layer, a medium gravel layer and a small gravel layer are sequentially arranged in the barrel from bottom to top, the Fenton mud biochar layer is arranged between the medium gravel layer and the medium gravel layer, the anode is embedded between the Fenton mud biochar layer and the medium gravel layer, and the cathode is located on the surface of the small gravel layer and exposed in the air. According to the device disclosed by the utility model, after the charcoal fired by the Fenton mud is added into the constructed wetland, the growth of heterotrophic denitrification and iron-related microorganisms can be stimulated, and the removal efficiency of nitrate nitrogen is improved. The battery can realize efficient nitrogen and phosphorus removal treatment of sewage, and has a relatively high application value.

The present application relates to the technical field of groundwater ecological restoration, and particularly is a method for precise recharge of multi-layer aquifer in groundwater overexploitation area, which aims at the problems of uneven recharge, well blockage, disconnection of well group regulation and control, and single monitoring in traditional recharge technology. The method first carries out hydrogeological survey to determine the parameters of recharge well, and lays out integrated monitoring array. Independent recharge is realized by layered sealing, and uniform recharge is realized by using degradable biological gel to temporarily block the dominant seepage channel. A digital twin platform is constructed to complete the intelligent regulation and control of well group, and the permeability of aquifer is enhanced by magnetic fluid. The parameters are dynamically adjusted in real time during the recharge process, and pulse gas-liquid-solid three-phase backwashing is used to clear the blockage, and in-situ purification and system self-power supply are realized by combining microbial fuel cell. Finally, the recharge scheme is optimized through comprehensive evaluation. The present application can precisely and efficiently recharge multi-layer aquifer, control land subsidence, reduce operation cost, and is suitable for restoration of various groundwater overexploitation areas.

The invention discloses a system for repairing underground water by utilizing a microalgae microbial fuel cell, the system comprises an anode module, a cathode module and a pumping module, the anode module comprises an anode reactor, a first electrode and a velvet net, the cathode module comprises a cathode reactor and a second electrode, and the pumping module is connected with the first electrode and the second electrode. The pumping module comprises a first peristaltic pump, a second peristaltic pump and a third peristaltic pump, a first electrode is arranged in the anode reactor, the surface of the first electrode is wrapped with a velvet net, a second electrode is arranged in the cathode reactor, and the first electrode and the second electrode are connected through a metal wire. According to the invention, the microalgae microbial fuel cell is directly placed in the to-be-repaired underground water in situ, so that the remediation efficiency of the underground water is improved by utilizing microalgae microorganisms, and meanwhile, the traditional aeration oxygen supply is replaced by microalgae photosynthesis, so that the power generation performance of the microbial fuel cell is improved, and the energy consumption is reduced; and the process cost of the microbial fuel cell is reduced based on the biochemical characteristics of the microalgae.

The invention provides an electrode assembly for a submarine microbial fuel cell, a preparation method and a device, belongs to the technical field of fuel cells, and solves the technical problem of low synergistic energy supply efficiency of a cathode and an anode of a fuel cell. The co-treatment anode is treated by urea and sodium persulfate; the ternary composite cathode is electrically connected with the co-processing anode through a wire; the co-processing anode releases electrons in seabed sludge through an oxidation reaction of microorganisms on organic matters, and the electrons are transmitted to the ternary composite cathode through a wire; a seabed sludge and seawater interface is used as a natural proton exchange membrane to realize a proton and electron transfer path between the anode and the cathode; the electrode assembly generates a potential difference through electron transfer and redox reaction and outputs energy. The method is suitable for preparing the electrode of the submarine microbial fuel cell.

The invention relates to the technical field of precise irrigation, and discloses orchard fruit tree precise irrigation flow control equipment which comprises a microbial fuel cell sensing probe, a fruit tree precise irrigation flow control system and an irrigation waterway system. The core is that the sensing probe is provided with an isolation anode which only responds to root exudates and an open anode which responds to rhizosphere total organic matters. The control system obtains and compares the first electric signal and the second electric signal generated by the double anodes with a preset threshold value, and differentially diagnoses the health, physiological water demand or environmental stress states of the fruit trees. When the physiological water demand state is judged, the system starts irrigation and stops irrigation when the signal rises to meet the threshold value, and closed-loop control is achieved; if it is judged that the environment stress state exists, irrigation is restrained. According to the method, soil background environment interference can be stripped, accurate decision is made directly according to the physiological activity of the fruit trees, on-demand and sufficient closed-loop irrigation is achieved, and water resources are remarkably saved.

The application discloses a microbial fuel cell system, a control method and a method for co-production of sodium acetate. The system comprises an anode chamber and a cathode chamber, and the anode chamber and the cathode chamber are separated by a proton exchange membrane. An anode component and a cathode component are arranged in the anode chamber and the cathode chamber respectively, and the anode component and the cathode component are used for supplying power to an external circuit. The anode chamber is filled with an anode medium, and a lower part of the anode component is immersed in the anode medium to form an immersion section of the anode component. The liquid level of the anode medium can be adjusted, and the immersion section of the anode component immersed in the anode medium can also be synchronously adjusted with the liquid level of the anode medium. The application can convert biomass energy into electric energy output, and can obtain sodium acetate through neutralization adjustment and purification by taking an intermediate product in a reaction process as a raw material, so that clean energy and by-product sodium acetate are co-produced.

A method for treating VOCs using a Co-S supported activated carbon single-atom composite catalyst coupled with a microbial fuel cell belongs to the field of waste gas treatment technology. This system successfully prepared activated carbon-supported metal sulfide Co-S single-atom composite catalysts of different particle sizes through equal-volume impregnation and co-deposition methods. These catalysts, used as cathodes coupled with bio-anodes, were used to construct microbial fuel cells (MFCs), achieving a VOCs purification and removal efficiency of over 98%, demonstrating excellent performance. This invention efficiently couples the adsorption properties of activated carbon with the electrocatalytic "strong oxidation chain scission" of single-atom catalysts and the "low-energy mineralization" of bio-anodes, achieving the dual goals of efficient VOCs removal and resource utilization. This method is applicable to the treatment of industrial waste gas, solving the problems of current conventional VOCs treatment requiring heating, high energy consumption, resource waste, and safety hazards, providing new ideas for catalytic material development and the application of advanced oxidation technologies.

Provided according to embodiments of the invention are methods of disrupting, removing, and / or preventing biofilm formation on a surface. Such methods use compositions that include nanoparticles and / or microparticles that include an inert liquid and / or gas core surrounded by an enclosing substance. Further provided according to embodiments of the invention are methods for disrupting a biofilm to extract an analyte from a sample, methods of disrupting superficial dermal layers, and methods of disrupting, removing, and / or preventing biofilms in hydroponic systems, microbial fuel cells, and on agricultural products.

This invention discloses a method for preparing a zirconium-based metal-organic framework@nickel-cobalt metal-organic framework oxygen reduction catalyst and its application in the removal of chloramphenicol. The method uses a nickel-cobalt metal-organic framework as a substrate, and fuses a zirconium-based metal-organic framework onto it via a hydrothermal method to form an octahedral zirconium-based metal-organic framework@nickel-cobalt metal-organic framework. This structure significantly improves the accessibility of adsorption sites and electrocatalytic active sites while maintaining the structural integrity of the metal-organic framework. The oxygen reduction performance was tested, and the system was coupled with an electroactive biofilm to determine the degradation efficiency of chloramphenicol within 244 hours. The results show that the zirconium-based metal-organic framework@nickel-cobalt metal-organic framework exhibits excellent oxygen reduction performance. In the modified microbial fuel cell, the degradation efficiency of chloramphenicol reached 90.31% within 244 hours, and the concentration decreased from 18.62 mg / L to 1.80 mg / L. This study provides a new approach for constructing efficient and stable metal-organic framework-based electrocatalysts, and has good application prospects in the fields of antibiotic wastewater treatment and environmental remediation.

This utility model relates to the field of microbial fuel cell technology, specifically a microbial fuel cell device, including a shell. A cover plate is fixedly connected to the top of the shell, and a partition mechanism is rotatably connected to the bottom of the cover plate. This utility model divides the inner cavity of the shell into two flow channels through the partition plate of the partition mechanism. Each flow channel is equipped with a proton exchange membrane. When the microbial fuel cell is working normally, the two flow channels are connected simultaneously, thereby increasing the working area of ​​the proton exchange membrane and thus increasing the working efficiency. When the proton exchange membrane needs to be replaced, a switching plate is used to close one flow channel, and the proton exchange membrane in that flow channel can be removed from the slot for replacement. At the same time, the probability of cross-contamination between the two ends of the flow channel is reduced. The cutting plate is rotated again to close the other flow channel and replace the other proton exchange membrane. This solves the problem that the bolt-fastened installation method of the proton exchange membrane is not convenient for replacement.