469results about "Biochemical fuel cells" patented technology

The invention discloses a self-powered biosensor for double-signal detection of sugarcane pokkah boeng disease, the self-powered biosensor comprises an anode, a cathode and an electrolyte, the anode is a CuCo-MOF / AuNPs / GOD biological anode, the cathode is a CuCo-MOF / AuNPs / DNA chain biosensor, and the electrolyte comprises glucose, MB and a PBS buffer solution. According to the self-powered biosensor, analysis is carried out through two non-interfering modes of electrochemical detection and colorimetric detection, and whether a detection result is a false positive signal or not can be effectively verified. An external power supply is not needed, and real-time outdoor detection can be realized. The material source is wide, the assembly process is simple, and accurate and rapid detection can be realized. The method has the advantages of high sensitivity, good selectivity and real-time detection, and can be used for accurately detecting the sugarcane pokkah boeng rot.

A water quality monitoring method. The method comprises: receiving BioElectrochemical System, BES, sensor data indicating an output from at least one BES sensor exposed to a water sample; and receiving data indicating at least one environmental parameter, at least one piece of configuration data for the BES sensor or at least one parameter for a system in which the BES sensor is implemented. The received data is processed according to a calibration algorithm to generate a parameter indicative of organic compound concentration for the water sample. A water quality monitoring device to implement the method may comprise a BES sensor and a processor to implement the calibration algorithm, and optionally one or more further sensors.

The invention belongs to the technical field of fuel cell electrode material preparation, and particularly relates to a carbon electrode material for a polypyrrole modified bio-based fuel cell and a preparation method of the carbon electrode material. Comprising the following steps: modifying rice hull low-temperature carbonized powder by sequentially adopting POSS (Polyhedral Oligomeric Silsesquioxane) containing unipolar functional groups and POSS containing polypolar functional groups to obtain modified low-temperature carbonized powder; and carrying out in-situ polymerization on a pyrrole monomer on the surface of the modified low-temperature carbonized powder, and carrying out high-temperature carbonization and hydrofluoric acid corrosion to obtain the polypyrrole modified bio-based fuel cell carbon electrode material. The polypolar functional group POSS not only is beneficial to the in-situ polymerization reaction of pyrrole, but also can form a continuous macromolecular chain, and a net structure is formed on the surface of the whole material. The effect of the unipolar functional group POSS is to improve the stability of the low-temperature carbonized powder in the high-temperature carbonization process, and more importantly, the unipolar functional group POSS is to provide a channel for subsequent hydrofluoric acid corrosion, etch away non-conductive substances and improve the conductivity and specific surface area of the carbon electrode material.

Disclosed in the present invention are a biomass-derived graded porous asymmetric coordination monatomic carbon-based electrocatalyst, and a preparation method therefor and the use thereof. The preparation method for the biomass-derived graded porous asymmetric coordination monatomic carbon-based electrocatalyst comprises the following steps: (1) stirring and mixing de-alkalized lignin with a transition metal salt, a nitrogen-containing compound and a template, i.e., magnesium oxide, in a solvent until uniform, so as to obtain a suspension, wherein the transition metal comprises iron and zinc; (2) heating, evaporating and drying off the suspension, so as to obtain a lignin / metal ion / nitrogen-containing compound / template mixed precursor; and (3) subjecting the mixed precursor to high-temperature pyrolysis under the protection of an inert gas, cooling same, and then sequentially washing and drying same, so as to obtain a monatomic carbon-based electrocatalyst. The monatomic carbon-based electrocatalyst provided in the present invention has graded pores of micropores, mesopores and macropores, a surface nanosheet and an asymmetric coordination structure of Fe-N3O at the same time, and can be applied to fuel cells and metal-air cells.

The present application relates to an electrochemical system and method for capturing carbon dioxide, regenerating purified carbon dioxide and / or converting the captured carbon dioxide to biomethane, syngas, formic acid, and combinations thereof. More specifically, the present application relates to an electrochemical cell having an air cathode proton or cation exchange membrane and an abiotic or biotic anode wherein captured carbon dioxide is reduced to carbonates that are regenerated as purified carbon dioxide or transferred to another chemical production module. The regenerated carbon dioxide can be purified, compressed, or stored for later use. The present application includes volatile fatty acids sourced from carbohydrate rich waste. The present application also includes the ability to regenerate caustic absorbents used in initial carbon dioxide capture.

The invention relates to the technical field of microbial electrochemistry, in particular to a microbial fuel cell self-driven microbial electrolysis cell system and application thereof. The microbial fuel cell self-driven microbial electrolysis cell system comprises a microbial electrolysis cell (MEC) and a microbial fuel cell (MFC) for supplying power to the MEC; an anode electrode of the MFC is a mixed strain immobilized modified carbon felt electrode, and a cathode electrode of the MFC is a modified carbon felt electrode; an anode electrode and a cathode electrode of the MEC are independently selected from one of a modified carbon felt electrode or a mixed strain immobilized modified carbon felt electrode; the mixed strain is a strain obtained by mixing shewanella and sludge bacteria; the anode electrode of the MEC is connected with the cathode electrode of the MFC, and the anode electrode of the MFC is connected with the cathode electrode of the MEC; the bipolar chambers of the MFC are both in an anaerobic state, and the bipolar chambers of the MEC are both in an anoxic state. The advantages of an MFC-MEC system are fully utilized, external power supply is not needed, the MFC supplies energy to the MEC to promote reverse flow of electrons, and electric energy is utilized in situ.

The invention discloses a device for treating black and odorous water in a constructed wetland in the field of sewage treatment, comprising: a fuel cell assembly comprising a reaction container, a cathode zone, an anode zone and a buffer zone from top to bottom in the reaction container, the cathode zone comprising a catalytic filler, the anode zone comprising an oxidation filler, and the buffer zone comprising a buffer filler; the oxidation filler is a composite material; the water passing assembly is communicated with the anode area and is used for slowly introducing black and odorous water into the anode area, and a plurality of horizontal water outlet pipes are vertically arranged on the reaction container at intervals; the current collection assembly is electrically connected with the anode region and the cathode region; the invention further discloses a manufacturing method. The fuel cell has the beneficial effects that the composite material prepared from the poly (butylene succinate), the manganese oxide and the manganese dioxide is used as the anode filler of the fuel cell, so that the formation of black and odorous substances can be reduced, and the treatment effect of the fuel cell on a black and odorous water body is improved.

The invention relates to the technical field of sewage treatment and resource utilization, in particular to a sludge treatment system with an integrated microbial fuel cell and a treatment method of the sludge treatment system. A first cathode plate matched with the sludge compression chamber is arranged at the other end in the sludge compression chamber in a sliding mode, a driving mechanism used for driving the first cathode plate to be close to or away from the first anode plate is arranged on the sludge compression chamber, and a sludge discharge port is formed in the lower portion of the sludge compression chamber. The chlorine salt and the tannic acid are added into the sludge in the pretreatment barrel, the chlorine salt is used for improving the electrochemical wall breaking effect of the sludge, the tannic acid is used for improving the dewatering performance of the sludge and reducing the hydrothermal dewatering temperature, the chlorine salt and the tannic acid are mixed in the pretreatment barrel and then enter the fuel tank for chemical reaction, electric energy is generated, and electric power is provided for the storage battery; the microorganisms can degrade organic matters in the sludge.

The invention provides a Fenton technology coupled microbial fuel cell, a preparation method and application, and relates to the field of environment, materials and energy, the specific technical scheme is as follows: the Fenton technology coupled microbial fuel cell comprises an anode, a cathode and a catholyte, and is characterized in that the anode is a biological anode, the cathode is an air cathode, and the air cathode is an air cathode; the air cathode comprises an oxygen reduction electrocatalyst and a cathode substrate I, the oxygen reduction electrocatalyst is attached to the cathode substrate I, and the catholyte is common industrial and domestic wastewater. The electro-Fenton technology is introduced into the air cathode of the microbial fuel cell, the cathode fully utilizes electrons generated by metabolism of a biological anode to carry out an oxygen reduction process in the presence of air, so that hydrogen peroxide is generated in situ and is activated into active species such as hydroxyl free radicals through a Fenton catalyst, and the hydrogen peroxide is converted into hydrogen peroxide. Therefore, the purpose of degrading complex pollutants with low energy consumption is achieved.

The invention discloses a microbial fuel cell coupling system for industrial wastewater treatment and energy regeneration, and the system comprises a wastewater treatment and energy conversion module which is used for introducing industrial wastewater into a microbial fuel cell, realizing efficient decomposition of organic matters under the metabolism effect of microbiota in an anode chamber, generating purified water reaching the standard, and recovering clean energy; the intelligent parameter control module is used for dynamically adjusting operation parameters of each unit through an MLP model; and the dynamic monitoring feedback module carries a high-precision sensor array and an internet-of-things transmission device, acquires parameters in the fuel cell in real time, provides a predictive regulation and control strategy for the system by applying an MLP model, and forms closed-loop optimization through an energy-material-information three-flow coupling mechanism. Through cooperative work of all the modules, efficient and stable operation of the system is achieved, the prospect in the field of industrial wastewater treatment is wide, the resource utilization efficiency can be remarkably improved, and the cost is reduced.

The invention belongs to the technical field of microbial fuel cells, and particularly relates to a microbial fuel cell, a carbon-based anode and a preparation method of the carbon-based anode. Preparing a polyaniline / dopamine modifier from an aniline monomer and dopamine hydrochloride, and modifying the polyaniline / dopamine modifier on a carbon felt electrode to form a PANI-DA / CF anode; the preparation method comprises the following steps: preparing flower-like Fe2O3 nanoparticles by adopting a hydrothermal method, and electrochemically depositing the flower-like Fe2O3 nanoparticles on a PANI-DA / CF electrode to prepare a Fe2O3 / PANI-DA / CF anode; according to the microbial fuel cell disclosed by the invention, the maximum power density of the phenol wastewater anolyte reaches 4594 + / -97 mW / m < 2 > and is improved by 83.1% compared with that of a carbon felt anode MFC (Microbial Fuel Cell); after operation for 96 hours, the phenol degradation rate reaches 99.4%; and the electricity generation performance is still kept stable after three months of operation. The Fe2O3 / PANI-DA / CF anode provided by the invention improves the power density output of the microbial fuel cell and the wastewater treatment efficiency.

To provide a novel microorganism having higher current generating ability, a microbial fuel cell composition and microbial electrolysis cell composition comprising the microorganism, as well as a microbial electrolysis cell and microbial electrolysis cell using the microorganism.SOLUTION: Provided are: a microorganism, a Geobacter sp. strain 60473; a microbial fuel cell composition comprising the Geobacter sp. strain 60473 and an organic substance; a microbial fuel cell in which the Geobacter sp. strain 60473 is used to decompose the organic substance as a fuel; a microbial electrolysis cell composition comprising the Geobacter sp. strain 60473 and the organic substance; and a microbial electrolysis cell in which the Geobacter sp. strain 60473 is used to decompose the organic substance as the fuel.SELECTED DRAWING: None

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 invention relates to a microbial fuel cell and application thereof, in particular to a photocatalytic / microbial coupled anode microbial fuel cell and application thereof in enhanced degradation of sulfamethoxazole. Aiming at the degradation treatment of typical refractory antibiotics such as sulfamethoxazole, the invention provides a photocatalytic / microbial coupled anode microbial fuel cell which can induce a photo-generated hole generated by a photocatalyst through a biological electric field generated by microbial degradation of pollutants, thereby promoting the separation of photo-generated electron hole pairs of the photocatalyst, and further improving the degradation efficiency of the antibiotics. The problem that photo-generated electron hole pairs of a photocatalyst are easy to compound is solved. Meanwhile, due to the existence of the photocatalyst, the electron transfer between the anode electroactive microorganisms and the anode can be improved through the generation of photo-generated holes, and the extracellular electron transfer of the microorganisms is enhanced. When being used for degrading sulfamethoxazole, the photocatalytic / microbial coupled anode microbial fuel cell disclosed by the invention has an extremely important scientific research value and a wide practical application prospect.

The invention discloses a nitrogen / boron-doped non-noble metal-based material, a synthesis method thereof and application of the nitrogen / boron-doped non-noble metal-based material in a microbial fuel cell. According to the method, a carbon fiber brush is used as a substrate, urea and sodium borohydride are used as a nitrogen source and a carbon source respectively, and the nitrogen / boron doped non-noble metal-based material is synthesized through a hydrothermal method. The electrostatic interaction between graphene oxide and FeCoNi-LDH is utilized to realize tight combination, so that FeCoNi-LDH nanosheets are uniformly dispersed on the surface of the carbon fiber brush, and the problems that LDHs are easy to agglomerate and poor in conductivity are solved; in the boron / nitrogen co-doping process, an efficient electron transmission channel is constructed by adjusting the electronic structure of the composite material, and the material is endowed with excellent electron transmission capability and oxygen reduction performance. In an MFC (Microbial Fuel Cell) test constructed by taking a nitrogen / boron-doped non-noble metal-based material as a cathode, the output voltage and the maximum power density are several times of those of commercial Pt / C and a blank carbon fiber brush, and the carbon fiber brush has a wide application prospect in the field of microbial fuel cells.

The utility model discloses a garbage biogas gasification treatment device capable of generating electricity, which relates to the technical field of garbage treatment equipment and comprises a reaction chamber, two conductive parts and a resistor or an energy storage element, a low-oxygen or oxygen-free environment can be kept in the reaction chamber, and a liquid inlet, a liquid outlet, a gas outlet and two fixing ports are arranged on the reaction chamber; the two conductive parts respectively extend into the reaction chamber through the two fixing ports to form two electrodes; the resistor or the energy storage element is arranged outside the reaction chamber; the resistor or the energy storage element is electrically connected with the two conductive pieces and enables the two electrodes to respectively form an anode and a cathode. According to the device, a microbial fuel cell and an anaerobic fermentation process are integrated in one set of device, so that the microbial fuel cell and the anaerobic fermentation process are highly and effectively integrated, the removal rate of organic matters in garbage is high, the occupied space is small, the proportion of CH4 in biogas is high, and electric energy is generated.

The invention discloses a high-sensitivity oxygen-resistant anode MFC (Microbial Fuel Cell) sensor for biotoxicity detection and a preparation method thereof. The sensor comprises a positive electrode, a negative electrode, a positive electrode chamber, a negative electrode chamber, a diaphragm, a current loop and a data acquisition system, a double-layer biological membrane is formed on the positive electrode through aerobic domestication, the outer layer is an aerobic bacteria layer, and the inner layer is an anaerobic electroactive bacteria layer. The aerobic bacteria on the outer layer consume dissolved oxygen and provide a stable environment for the anaerobic bacteria on the inner layer, so that the oxygen resistance and the operation stability of the sensor are remarkably improved. When the toxicity of a to-be-detected sample is detected, the biotoxicity of the sample is represented through the electrogenesis inhibition rate of the sensor. Experiments show that the response sensitivity of the sensor to toxic substances (such as Cu (II)) is obviously higher than that of a traditional anaerobic MFC sensor, and the sensor shows excellent anti-interference capability under different dissolved oxygen conditions. The method is suitable for rapid detection of biotoxicity of water and environmental samples, and has the characteristics of high sensitivity, strong oxidation interference resistance and good stability.

The invention belongs to the technical field of biological fuel cells, and particularly relates to an enzyme biological fuel cell system for detecting sugarcane pokkah boeng disease through three signals as well as a preparation method and application of the enzyme biological fuel cell system. The enzyme biological fuel cell system comprises an enzyme biological fuel cell and a photothermal conversion solution TiO2 (at) Au, the enzyme biological fuel cell comprises a biological anode, a biological cathode and an electrolyte, the biological anode is MWNT (at) ZIF-8 / AuNPs / GOD, and the biological cathode is an MWNT (at) ZIF-8 / AuNPs / DNA chain. According to the invention, false positive signals of detection results can be effectively calibrated; through combined use of three detection modes, high sensitivity, selectivity and real-time monitoring capability can be realized, and the method can be used for accurate detection of the sugarcane pokkah boeng rot.

The invention discloses a method for enhanced removal of VOCs (volatile organic compounds) and synchronous power generation by a biological filter bed coupled microbial fuel cell system. According to the method, VOCs are introduced into a cathode chamber of a microbial fuel cell and then upwards penetrate through a filler layer of a fungus-bacterium coupled biological filter bed, in the stage, hydrophobic VOCs are adsorbed by fungal hyphae and then are aerobically degraded by bacteria to generate metabolic intermediates, hydrophilic VOCs can be directly degraded by aerobic bacteria, the purified VOCs are discharged from the top, and the purified VOCs are discharged from the bottom of the microbial fuel cell. Hydrophilic VOCs and metabolic intermediates which are not degraded in time can enter an anode chamber of the microbial fuel cell along with the nutrient solution, and the hydrophilic VOCs and the metabolic intermediates are further degraded as power generation substrates and generate electrons (e <->). According to the invention, the fungus-bacteria mixed biological filter bed is coupled with the microbial fuel cell system for treatment, so that enhanced removal is realized, and high-efficiency power generation is also realized.

The invention discloses a biomass-derived graded porous asymmetric coordination monatomic carbon-based electrocatalyst as well as a preparation method and application thereof. A preparation method of a biomass-derived graded porous asymmetric coordination monatomic carbon-based electrocatalyst comprises the following steps: (1) dealkalized lignin, transition metal salt, a nitrogen-containing compound and a template agent magnesium oxide are stirred and mixed uniformly in a solvent to obtain a suspension, and the transition metal comprises iron and zinc; (2) heating, evaporating and drying the turbid liquid to obtain a lignin / metal ion / nitrogen-containing compound / template agent mixed precursor; and (3) performing high-temperature pyrolysis on the mixed precursor under the protection of inert gas, cooling, and sequentially washing and drying to obtain the monatomic carbon-based electrocatalyst. The monatomic carbon-based electrocatalyst provided by the invention has hierarchical pores of micropores, mesopores and macropores, a surface nanosheet and an asymmetric coordination structure of Fe-N3O at the same time, and can be applied to fuel cells and metal-air cells.

The invention relates to the technical field of microbial fuel biological cells, in particular to an efficient electrogenesis microbial fuel cell as well as preparation and application thereof. The method comprises the following steps: firstly, carrying out anaerobic domestication on current-producing bacteria in active sludge subjected to sieving and impurity removal to obtain mixed current-producing bacteria; then putting the mixed current-producing bacteria into an anaerobic basic culture medium containing phenazine-1-carboxylic acid for enrichment culture to obtain enriched mixed current-producing bacteria; and finally, putting the enriched mixed electrogenesis bacteria and the anolyte into an anode chamber of a microbial fuel cell double-chamber reactor, and then adding the catholyte into a cathode chamber to obtain the microbial fuel cell capable of efficiently generating electricity. Wherein in the anaerobic domestication process, the salt tolerance of the current-producing bacteria in the activated sludge is enhanced by utilizing the stress pressure of jump salinity. According to the method, the electricity-producing bacteria are cultured by adopting a jumping type salinity gradient stimulation method, and the obtained MFC is suitable for application scenes of chemical high-salinity wastewater, so that the method has a relatively good industrialization prospect.

The invention discloses a preparation method of a layered double hydroxide combined cobalt disulfide and nickel tetrasulfide combined multi-walled carbon nanotube catalyst, which comprises the following steps: firstly, preparing cobalt disulfide and nickel tetrasulfide combined multi-walled carbon nanotubes through a two-step hydrothermal method; and then successfully preparing the ferro-nickel layered double hydroxide and nickel dicobalt tetrasulfide combined multi-walled carbon nanotube. The invention also discloses an application of the ferro-nickel layered double hydroxide and nickel dicobalt tetrasulfide combined multi-walled carbon nanotube as a microbial fuel cell cathode catalyst. The prepared material has higher porosity, more reaction sites, better electrochemical stability and higher conductivity, so that when the material is used as a cathode catalyst of the microbial fuel cell, the efficiency of electric ion flow is improved, the stability of electrode circulation and the power generation efficiency are ensured, and the performance of the microbial fuel cell is improved.

A bioelectrode comprising: a complex compound composed of a metal and a ligand; a mediator having an anionic functional group; and an electroconductive material.

A wastewater stream is flowed from a separator to an anode side of a microbial electrolysis cell (MEC). The wastewater stream includes water and hydrocarbons. The separator is positioned in a gas-oil separation plant. The MEC electrolyzes the hydrocarbons to produce hydrogen ions. A membrane separates the MEC into the anode side and a cathode side. The membrane allows the hydrogen ions and water molecules to pass through the membrane from the anode side to the cathode side, thereby forming a treated wastewater stream at the cathode side. The MEC combines the hydrogen ions at the cathode side to produce hydrogen gas. The treated wastewater stream and a hydrogen gas stream is discharged from the cathode side. The hydrogen gas stream includes the hydrogen gas produced by the MEC. The hydrogen gas stream is oxidized into water. Electrical power is generated in response to oxidizing the hydrogen gas into water.

The application discloses a preparation method and application of a photo-fuel cell (PFC) based on degradation of bisphenol A and reduction of carbon dioxide, wherein the photo-fuel cell comprises a photo-anode and a biological cathode, the photo-anode is a TiO2@CdS / ITO electrode, and the biological cathode is an FDH / DA / PANi / CC electrode.The photo-fuel cell can not only effectively degrade BPA, but also has a degradation rate of 100%; the constructed FDH / DA / PANi / CC biological cathode can efficiently reduce CO2 into formic acid, and the yield is 3.7μmol·h ‑1 -1 . Compared with other photo-fuel cells, the degradation rate of BPA and the yield of formic acid are obviously improved; in addition, the constructed photo-fuel cell can also effectively generate electricity, and the maximum current density and power density are 271μA cm ‑2 -2 and 67.2μW cm ‑2 -2 respectively.

This invention discloses a CO2 direct air capture system and method for increasing CO2 partial pressure. The system includes a first air pump, a second air pump, a microbial fuel cell device, a CO2 capture device, a rich liquid desorption unit, and a CO2 storage unit. The microbial fuel cell device includes a reactor housing, a proton exchange membrane, wires, and external circuitry. The first air pump is located outside the microbial fuel cell device and pumps ambient air into the cathode chamber. A jacket is provided outside the reactor housing to enclose the reactor housing. The CO2 capture device is a sealed housing with a liquid inlet, a liquid outlet, an air inlet, and an air outlet. The air outlet of the cathode chamber of the microbial fuel cell device is connected to the air inlet of the CO2 capture device via a pipe, and a second air pump is installed on the pipe. The rich liquid desorption unit includes a battery waste heat heating device and an electrically heated desorber. The CO2 storage unit includes a CO2 compressor and a CO2 storage container.

A composition for manufacturing an electrode, the composition including an electrically conductive carbon-based compound, at least one species able to form a catalyst, and cellulose microfibrils encapsulating chitosan. The cellulose microfibrils create a fibrous mesh binding the composition while limiting coating of the catalyst. Thus, the catalyst remains accessible to the surrounding environment, to allow the redox reactions at the electrode. The electrochemical performances of the electrode are consequently improved. The composition is furthermore particularly adapted for shaping an electrode by 3D printing.

The application discloses application of microbial electrochemical coupling anaerobic reaction reinforced biological methane synthesis in carbon neutralization. A microbial electrolysis cell is composed of an anode chamber, a cathode chamber and a proton exchange membrane, the anode chamber and the cathode chamber are connected through the proton exchange membrane, a mixed solution of sewage, ionic liquid and a solution of first methanogenic microorganisms is used as a substrate in the anode chamber, a mixed solution of culture medium, ionic liquid and a solution of second methanogenic microorganisms is used as a substrate in the cathode chamber, under the action of an external power source, the sewage in the anode chamber is degraded to generate electrons and H + , H + CO2 in the cathode chamber is converted into methane under the action of microorganisms; the first ionic liquid or the second ionic liquid is an amino acid anion type ionic liquid. The microbial electrolysis cell is convenient to operate and maintain and has a small floor area.

This invention discloses a bioelectrochemical denitrification system using a slow-release carbon source as the anode fuel, belonging to the field of microbial fuel cell technology. It comprises an anode chamber, a cathode chamber, an anode, a cathode, wires, and a separating membrane between the anode and cathode chambers. Electrochemically active microorganisms grow on the anode in the anode chamber, and anaerobic fermentation bacteria are present in the solution. An electrolyte and hydrogel particles with slow-release carbon function are added to the anode chamber. Electrochemically active denitrifying bacteria grow on the cathode in the cathode chamber. The hydrogel-released carbon serves as the solid fuel at the anode, providing a continuous electron donor to the cathode. Simultaneously, the selective permeation membrane controls the transmembrane transport of small organic molecules to the cathode, providing a carbon source for the denitrifying bacteria. The combined supply of electrons and carbon enhances denitrification by the denitrifying microorganisms at the cathode. This system is suitable for enhanced denitrification of polluted water bodies with low C / N ratios.

The invention belongs to the technical field of microbial fuel cells, and relates to preparation of a functional lignin-based biomass charcoal electrode prepared by flash evaporation Joule heat and performance research of the functional lignin-based biomass charcoal electrode. The lignin-based biomass material is subjected to one-step carbonization and functionalization by using a flash evaporation Joule heat technology. According to the preparation method, recycling of biomass waste and preparation of the microbial fuel cell anode are rapidly and efficiently completed, and the extracellular electron transfer rate between the material and microorganisms is effectively promoted through biocompatibility and capacitive performance of the microbial fuel cell anode. The method comprises the following steps: S1, preparing and pretreating ganoderma lucidum mushroom residues; s2, carrying out hydrothermal reaction on the treated ganoderma lucidum mushroom bran, and pre-carbonizing to obtain mushroom bran water carbon; s3, mixing mushroom bran water carbon and ferrocobalt metal salt in equal proportion to obtain a flash evaporation Joule heat precursor; s4, carrying out flash Joule heat treatment on the precursor to obtain ferrocobalt doped mushroom bran graphene; s5, preparing the cobalt-iron doped graphene as an anode material and assembling the microbial fuel cell; compared with an existing microbial fuel cell anode preparation method, the method has the advantages that recycling of lignin biomass waste and preparation of the microbial fuel cell anode are rapidly and efficiently completed, and the extracellular electron transfer rate between the material and microorganisms is effectively promoted through biocompatibility and capacitive performance of the lignin biomass waste.