246 results about "Microbial fuel cell" patented technology

Improved performance ion exchange membranes for use in REM, AEM and DMFC fuel cells, buffered fuel cells, hydrolysis, other applications comprise a molecular matrix of homopolymers, di-monomer, heteropolymers, copolymers, or block-polymers of fluorocarbon and hydrocarbon compounds combined with (i) skeletal support grid to improve durability, handling, reduce membrane swelling, and sequester dopants and nanoparticles from leakage; (ii) microporous membrane formed using a sacrificial filler process enhancing conductivity and limiting fuel crossover; (iii) hetero-ionomeric matrix of two-or-more membrane-bound acids e.g. sulphonic and phosphonic acid expanding usable range; (iv) permanent fillers enhancing conductivity and porosity including nanoparticles, metal-oxides, zeolites, silicates, GOs, CNTs, MOFs, POSS, and others; (v) ionic liquid doping to enhance membrane conductivity; (vi) membrane nanocoating preventing H2O2 diffusion; and / or (vii) catalytic nanocoating with metals, metal-oxides, and MOFs preventing atmospheric toxin catalyst poisoning. Combined with a heterogenous GDI, the IEM is integrated into iBFC power blade and energy bank applications.

The invention discloses a sulfur autotrophic denitrification filter material enhanced constructed wetland microbial fuel cell sewage treatment system and method, and the treatment system 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. The constructed wetland microbial fuel cell and the sulfur autotrophic denitrification technology are combined, the dual effects of pollutant removal and electric energy generation are achieved, a new thought is provided for combination of the constructed wetland microbial fuel cell and the sulfur autotrophic denitrification technology, and meanwhile, a new direction is provided for removal of river sewage.

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.

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 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 method for monitoring acid-alkali wastewater by using a sediment microbial fuel cell sensor matrix, which comprises the following steps of: arranging the sediment microbial fuel cell sensor matrix in a water body to be detected, and recording the voltage, the conductivity and the dissolved oxygen of each sediment microbial fuel cell sensor in real time and on line through a monitoring terminal; the pH value of the water body at the monitoring position of each sediment microbial fuel cell sensor is calculated through a formula, and a heat map is drawn to display the dynamic change of the pH along with time, so that the diffusion range of the acid-alkali wastewater is monitored, and pollutants are traced. According to the method, the pH and the diffusion range of the sewage can be remotely monitored online in real time, the source tracing of acidic and alkaline sewage is realized, the monitoring result is intuitively presented in a dynamic heat map form, the sensor is light, the labor is saved, the cost is low, and the monitoring process is pollution-free.

The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment system and a wastewater treatment method, which realize a closed-loop system of'wastewater treatment-energy recovery-resource regeneration 'cooperative treatment by combining a microbial fuel cell with a sludge pyrolysis technology. According to the system, organic matters in wastewater are converted into electric energy by utilizing a microbial fuel cell system, meanwhile, the concentration of pollutants is reduced, generated sludge is subjected to two-stage pyrolysis after being subjected to dehydration pretreatment to prepare biochar, the biochar can be used for soil improvement, water purification and the like, and synthesis gas generated by pyrolysis is used for power generation to supplement energy consumption of the system. The resource utilization rate is effectively increased, the sludge yield is reduced, the treatment cost is reduced, and good environmental benefits and economic benefits are achieved.

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 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.

The invention discloses a constructed wetland microbial fuel cell coupled photocatalytic system for treating fluorine-containing caprylic acid wastewater, and relates to a constructed wetland microbial fuel cell coupled photocatalytic system. The invention aims to solve the problem that CW-MFC and photocatalysis are not combined to improve the removal rate of PFOA at present. The device comprises a reactor shell, a bottom filler layer, an anode region, a middle filler layer, a cathode region, wetland plants and an outer resistor, the bottom packing layer, the anode region, the middle packing layer and the cathode region are sequentially overlapped in the reactor shell from bottom to top, the cathode region loaded with a photocatalyst is connected with the anode region through an external resistor to form a circuit, a water inlet is formed in the lower part of the reactor shell, and a water outlet is formed in the upper part of the reactor shell. And the roots of the wetland plants penetrate through the cathode region and are planted in the middle filler layer. The invention belongs to the technical field of perfluorinated compound pollution remediation.

The invention relates to the technical field of sewage treatment, and discloses a sewage biotoxicity detection system. The system comprises a reaction module, a detection module and a data processing module, the reaction module, the detection module and the data processing module are connected in sequence; the reaction module is used for providing a metabolic environment for the sewage to be detected and nitrifying bacteria; the detection module is used for detecting activity data in a metabolic environment; the activity data comprises at least one of ammonia nitrogen concentration, microbial fuel cell current and active oxygen fluorescence signal intensity; and the data processing module is used for determining the toxicity of the sewage to be detected based on the activity data. According to the present invention, with the nitrifying bacteria as the indicator organism of the sewage toxicity, the accurate evaluation of the sewage biological toxicity is achieved based on the detected multi-dimensional activity data such as the ammonia nitrogen concentration, the microbial fuel cell current, the active oxygen fluorescence signal intensity and the like.

The invention relates to a polling type microbial fuel cell energy collection device with multichannel independent maximum power tracking, which takes a microbial fuel cell as an energy source and performs independent maximum power point tracking on each microbial fuel cell accessed into a system by using a polling working mode. Therefore, the overall output power of the microbial fuel cell is improved, and the conversion efficiency is improved.

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.

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.

The invention discloses a method for monitoring water quality and enhancing pollutant removal performance by using an embedded CW-MFC (Carbon Wave-Microbial Fuel Cell), and belongs to a water environment treatment technology, the method comprises the following steps: embedding a CW-MFC system into a CW system, so that the effluent of the CW system can enter the CW-MFC system from the top of the CW system, and the effluent of the CW system entering the CW-MFC system and the self effluent of the CW-MFC system can be communicated with each other; after being converged at the bottom of the cathode layer of the CW-MFC system, the water is discharged from a water outlet of the CW-MFC system; constructing a fitting equation of coulombic efficiency and bottom inflow organic matter concentration of the CW-MFC system; and according to the fitting equation and the coulombic efficiency calculation formula, on the premise of obtaining the organic matter concentration of the effluent at the bottom of the cathode layer of the CW-MFC system, obtaining the organic matter concentration of the effluent at the bottom of the CW-MFC system. On the basis of the CW-MFC system, the CW-MFC system is embedded into the CW system, so that the pollutant removal performance of the CW system is improved, and meanwhile, the concentration of the organic matters in the inlet water at the bottom of the CW-MFC system is monitored by utilizing the relationship between the concentration of the organic matters in the inlet water and the coulombic efficiency presented by the system.

The invention provides a system driven by a microbial fuel cell and used for synergistically degrading antibiotics through photoelectrocatalysis. The system comprises a photoelectrocatalysis device and a microbial fuel cell system. According to the invention, a confinement packaging photo-anode + MFC self-driving + in-situ H2O2 production synergistic system is adopted, a green self-driving energy system is constructed, a double-chamber MFC is adopted to replace an external bias voltage, electricity is generated by using a microbial degradation photoelectrocatalysis intermediate product, a stable voltage (0.6-0.8 V) is output, the photoelectrocatalysis requirement is met, and no fossil energy is input in the whole process.

The invention discloses a novel method for generating electricity by treating aged landfill leachate through a Co3O4 / Ni-MOF anode single-chamber MFC, and belongs to the technical field of inorganic environment materials and waste water resource utilization. The method comprises the following steps: firstly preparing different materials and taking the different materials as an anode catalyst of a microbial fuel cell (MFC), then constructing a single-chamber MFC, taking anaerobic activated sludge obtained by culturing aerobic activated sludge of a sewage treatment plant as anolyte, adding a nutrient solution, stabilizing for several periods, replacing an anaerobic sludge matrix in an anode chamber with the aged landfill leachate, and finally preparing the aged landfill leachate in the single-chamber MFC. The MFC is operated at room temperature and constant pressure, organic pollutants and ammonia nitrogen in the aged landfill leachate can be removed, and meanwhile electric energy can be recycled. The method is simple in equipment, convenient to operate, energy-saving and free of secondary pollution. When the anode catalyst is Co3O4 / Ni-MOF, the maximum power density of the single-chamber MFC reaches 882 mW / m < 2 >, the maximum output voltage is 524 mV, the COD removal rate can reach 35.3%, and the ammonia nitrogen removal rate can reach 48.5%.

The present invention discloses a method and device for in-situ remediation of black and odorous water bodies by using a microbial fuel cell-aquatic plant. The steps are as follows: A. Bury an anode plate at a position below the sediment-water interface of the black and odorous water body; B. Pass the roots of the aquatic plants through the circular holes on the anode plate and root them in the sediment; C. Set a cathode plate at the water-air interface so that the cathode plate floats in the water surface and the cathode plate is exposed to the air; D. Connect the anode plate and the cathode plate with an external wire and an external resistor to form a current loop. The anode plate is located below the sediment-water interface. There are circular openings arranged in an equidistant array on the anode plate. The roots of the aquatic plants pass through the openings of the anode plate and penetrate into the sediment. The cathode plate floats at the overlying water-air interface. The anode plate and the cathode are connected in sequence through an external wire and an external resistor to form a current path. The method is simple, the operation is convenient, the structure is simple, which promotes the absorption of nutrients by aquatic plants, converts them into plant biomass, and improves the black and odorous and eutrophic state of the water body.

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.

The invention discloses a method and a system for degrading RDX wastewater by using a microbial fuel cell, which are characterized in that three MFC devices (classical double-chamber, external photocatalysis combination and photo-anode MFC) are constructed, and TiO2 nanotube photocatalysis material preparation, gradient microbial acclimation and process optimization are combined, so that RDX efficient degradation and electric energy recovery are realized. The RDX molecular structure is destroyed through photocatalysis, and the toxicity is reduced; intermediate products are thoroughly mineralized through microbial metabolism; and the flora adaptability is enhanced by gradient domestication. The embodiment shows that the photo-anode MFC shortens the complete degradation time of the RDX to 7 days, and the electricity generation stability is remarkably improved. The method has high efficiency, economical efficiency and environmental friendliness, and is suitable for energy-containing wastewater treatment and resource utilization.

The invention discloses a nonlinear optimal control method of a microbial fuel cell, and relates to the technical field of energy control. A nonlinear optimal controller can be directly designed for a nonlinear system; the input of the microbial fuel cell is controlled by using nonlinear optimal control, namely dilution rate, and unknown parameters in a nonlinear optimal controller are optimized by using an improved particle swarm algorithm, so that the microbial fuel cell quickly and stably generates maximum output voltage.

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.

The invention discloses a high-salt high-COD wastewater treatment method and system, and relates to the technical field of sewage treatment.The high-salt high-COD wastewater treatment method comprises the steps that high-salt high-COD wastewater is pretreated through a combined reaction tank integrating air flotation, coagulation and oxidation functions, and pretreated water and organic sludge are obtained; the organic sludge is subjected to anaerobic digestion, generated biogas is used for gas power generation, and electric energy and waste heat are obtained; carrying out primary desalination on the pretreated water by utilizing waste heat, a membrane evaporation technology and a fractional crystallization technology to obtain primary treated water; decomposing residual organic matters in the primary treated water by using a microbial fuel cell to generate power, so as to obtain secondary treated water and electric energy; performing deep filtration on the secondary treated water through a dynamic membrane bioreactor and an electrochemical auxiliary technology to obtain tertiary treated water; a photocatalytic and electro-catalytic catalytic reactor is driven by electric energy, and three-stage treated water is treated by combining a biological catalytic oxidation bed and an ozone micro-nano bubble technology, so that purified water reaching the standard is obtained. According to the invention, standard water is obtained through multi-stage water treatment.

The present invention relates to the field of carbon aerogel technology, specifically disclosing a method for preparing a magnetic cellulose-carbon aerogel composite electrode material and its application. Using natural pulp as a precursor, the cellulose hydrogel is prepared via a sol-gel process. This hydrogel is then impregnated with ferric chloride, freeze-dried, and finally pyrolyzed in a tubular furnace to produce a magnetic cellulose-carbon aerogel (CA@Fe3O4) composite material. The magnetic cellulose-carbon aerogel prepared in this invention exhibits high specific surface area, good electrical conductivity, and excellent biocompatibility. Used in microbial fuel cell anodes, it can degrade dimethyl sulfide while converting chemical energy into electrical energy, enabling the renewable utilization of organic matter.

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 discloses a Klebsiella strain with electroactivity and application of the Klebsiella strain in degradation of plastics. The Klebsiella strain is Klebsiella sp. X11, and the preservation number of the Klebsiella strain is CGMCC (China General Microbiological Culture Collection Center) 1.62470. The degradation strain X11 is obtained through separation and screening, belongs to gram-negative bacteria, and can realize efficient degradation of the polyvinyl chloride film, so that the polyvinyl chloride film reaches a relatively high weight loss ratio. Meanwhile, it is found that the strain X11 has electrochemical activity, can degrade polyvinyl chloride (PVC) and generate electricity by means of a microbial fuel cell, and has wide application prospects in the fields of plastic pollution bioremediation, plastic solid waste resourceful treatment and utilization and the like.