143 results about "Bioelectrochemistry" patented technology

The invention relates to a bioelectrochemical sensor used for detecting hydrogen peroxide and a manufacturing method of the bioelectrochemical sensor. The novel bioelectrochemical sensor is a sensor with a three-electrode system, wherein the counter electrode is a platinum electrode, the reference electrode is saturated calomel electrode and the working electrode is gold electrode. The sensor is based on orientation combination of a polypeptide horse radish peroxidase with characteristic sequence, the promotion effect of the polypeptide horse radish peroxidase on the activity of the enzyme and the characteristic of high sensitivity of electrochemical detection methods. The sensitivity of hydrogen peroxide sensors is effectively improved and satisfactory results are obtained.

The invention relates to a coal chemical wastewater treatment device with nano-catalysis coupled with bioelectrochemistry. The invention belongs to the technical field of coal chemical wastewater treatment. The device comprises a pretreatment area, a bioelectrochemical treatment area, a catalyst recovery area and a clear water area which are connected in sequence, a nano Fe3O4 / TiO2 composite catalyst filling layer and a microporous aeration device are arranged in the pretreatment area; a biological anode region of the biological electrochemical treatment region adopts a graphene modified carbon brush, and a biological cathode region of the biological electrochemical treatment region adopts a sulfur-doped carbon felt; and the catalyst recovery area adopts a high-gradient permanent magnetic roller and is matched with a pulse backwashing system. The treatment cost of each ton of water is reduced to 25-35 yuan, and the cycle life of the catalyst is gt; the time is 200 times; the sulfur can be reused in a desulfurization process of a sewage treatment plant, so that the medicament cost is reduced; the carbon emission is reduced by 60%; the COD removal rate is not less than 95%, the total phenol removal rate is not less than 98%, and the total nitrogen removal rate is not less than 90%; energy consumption is reduced by 40% compared with a traditional electrochemical method, and the catalyst recovery rate is gt; 95%.

The invention belongs to the technical field of wastewater treatment and recycling, and relates to a low-pressure ultrafiltration sewage treatment method and device based on bioelectrochemical enhancement and application. The treatment device consists of a water inlet tank, a constant water level water tank, a cathode, a resistor, a membrane assembly, a biological filter cake layer, a pre-filtering layer-anode, an ultrafiltration membrane, a water collecting device, a data acquisition module and a computer. The treatment device is used for treating effluent of a secondary sedimentation tank of a sewage plant and tail water of livestock and poultry breeding wastewater; on the basis of retaining nitrogen and phosphorus resources, deep removal of heavy metals and antibiotics is realized, propagation of resistance genes is inhibited, and safe reuse of nitrogen and phosphorus resources in effluent of sewage plants and tail water of livestock and poultry breeding wastewater can be realized. In the invention, low-pressure ultrafiltration adopts transmembrane pressure difference generated by gravitational potential energy to realize continuous flow filtration, coupled bioelectrochemistry utilizes electric energy generated by biodegradation of organic matters to realize reduction of heavy metals and deep removal of reinforced antibiotics, and the method has the advantages of greenness, low carbon and sustainability.

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 electrode online monitoring system and method based on multi-modal fusion and a self-repairing mechanism, and belongs to the technical field of environmental monitoring and bioelectrochemistry. Aiming at the problems of high cost, weak anti-interference capability, poor long-term stability, difficulty in precise decoupling of multi-parameter coupling and the like in the existing microbial electrode monitoring technology, the method comprises the following steps: synchronously acquiring multi-modal signals of a dual-wavelength differential near infrared spectrum and an electrochemical impedance spectrum; a front decoupling mechanism based on equivalent circuit fitting and reinforcement learning is combined to clearly distinguish change sources of charge transfer resistance and diffusion resistance; performing deep fusion on the decoupled features by using a convolutional neural network, and outputting a microbial activity score and a metabolite concentration; and a self-repairing electrode material and a closed-loop feedback control mechanism are introduced, and repairing is automatically triggered when electrode performance degradation is monitored. According to the invention, low-cost, high-precision and strong-anti-interference long-term stable in-situ monitoring of the microbial electrode is realized.

The utility model relates to the technical field of sewage treatment equipment, in particular to an electrolytic biological filter system for rapid treatment of overflow pollution, which comprises a bioelectrochemical system and a biological aerated filter system, the bioelectrochemical system comprises a tank body I, a biological anode and a biological cathode are arranged in the tank body I, and the biological anode and the biological cathode are arranged in the tank body II. The biological anode and the biological cathode are connected to a power supply, the biological aerated filter system comprises a tank body II, sewage treated by the tank body I enters the tank body II, an aeration device, a filtering device and a clear water outlet device are arranged in the tank body II, and the biological electrochemical system is coupled with the biological aerated filter through the aeration device, the filtering device and the clear water outlet device. The electrolytic biological filter system for rapidly treating overflow pollution is formed, the rapid electron transfer characteristic of a bioelectrochemical system is fully utilized, the denitrification rate of the biological aerated filter is increased, the treatment time can be greatly shortened under the same denitrification requirement, and the effect of rapidly treating overflow pollution in emergency is achieved.

The invention discloses a method for removing heavy metals in sludge, and belongs to the field of environmental protection technology and solid waste recycling. The method comprises the following steps: adding a bioleaching bacteria solution and a nutritive salt solution into dewatered sludge, and adjusting the pH value to form mixed slurry; applying an asymmetric alternating-current electric field to the mixed slurry to perform biological-electrochemical coupling treatment, and performing solid-liquid separation on the treated slurry to respectively obtain purified sludge and leachate containing heavy metals. By utilizing polarization inhibition and oscillation mass transfer effects of the asymmetric alternating-current electric field, the removal efficiency of the bioleaching on the heavy metals in the sludge, especially the organic combined state and residual state heavy metals, is remarkably enhanced, and the method has the outstanding advantages of short treatment period, low energy consumption, no electrode polarization and high heavy metal removal rate.

The application discloses a biological electrochemical auxiliary sulfur conversion promoting sulfur-based denitrification and sulfate emission reduction method and belongs to the field of water treatment. ‑ Nitrogen-containing wastewater enters an elemental sulfur denitrification system, and NO3 0 is reduced to N2 by sulfur autotrophic denitrifying bacteria, and elemental sulfur (S 2‑ ) is converted into SO4 2‑ . Effluent enters a cathode chamber of an electrochemical auxiliary sulfate reduction system, and hydrogen autotrophic sulfate reducing bacteria utilize cathode hydrogen production to reduce SO4 ‑ to HS 2‑ , and meanwhile, alkalinity produced by cathode hydrogen production neutralizes acidity produced in the denitrification process in the elemental sulfur denitrification system. ‑ HS 2‑ / supernatant is returned to the elemental sulfur denitrification system to react with S 0 to generate polysulfide (S n 2‑ ), S n 2‑ , which is used as an efficient electron donor to participate in denitrification, thereby significantly improving denitrification efficiency. The application does not need to add an organic carbon source, sludge production is small, high-concentration nitrogen-containing wastewater is efficiently treated, and the content of sulfate in effluent is simultaneously reduced, thereby realizing sulfur resource recycling, and the application is an economic and environment-friendly autotrophic denitrification method.

The invention relates to a device for extracting ammonium ions (8) from a digestate resulting from a treatment of an enrichment liquid made of biodegradable material and comprising: - a bio-electrochemical treatment unit (12) receiving a first volume of digestate and a second volume of enrichment liquid, - a unit (40) for acquiring a value of at least one parameter representative of a value of at least one quality parameter of the digestate, and of a value of at least one quality parameter of the enrichment liquid, - a unit (44) for determining a value of a ratio of a mixture representative of an amount of biodegradable organic material relative to an amount of ammonium ions, - a unit (48) for determining a mixing ratio of the digestate and of the enrichment liquid depending on the value of the ratio characteristic of a mixture, - a control unit (52) configured to obtain it.

The invention belongs to the technical field of heavy metal contaminated soil bioremediation, and particularly relates to a method for remediating heavy metal contaminated soil through a Fe3C-N-S composite modified electrode enhanced bioelectrochemical system. Graphene oxide, an iron source, a nitrogen source and a sulfur source serve as raw materials, a Fe3C-N-S composite material is prepared through high-temperature calcination, then the Fe3C-N-S composite material is compounded with sodium alginate (SA) hydrogel, the surface of a graphite rod is coated with the composite material, a Fe3C-N-S composite modified electrode is constructed through a CaCl2 cross-linking and freeze-drying technology, then the modified electrode is coupled with a graphite cathode, and the composite material is obtained. And the acidophilic thiobacillus ferrooxidans is combined to construct a bioelectrochemical system, so that the synergistic and efficient leaching of the heavy metals in the soil is realized. The conductivity, biocompatibility and corrosion resistance of the electrode can be remarkably improved, the problems that mass transfer is difficult and microorganism loading is unstable in BES remediation are solved, and a breakthrough technical scheme is provided for green and efficient remediation of heavy metal contaminated soil.

The invention relates to a bioelectrochemical method for efficiently removing fluorine and degrading perfluorinated compounds and application of the bioelectrochemical method, and belongs to the technical field of pollutant treatment. According to the method disclosed by the invention, the sulfate reducing flora (SRB) which takes Clostridiumsensuricto as a main dominant bacterium (the relative abundance is 46.06%) is enriched. The SRB rapidly grows on the surface of the cathode by using electrons provided by the cathode, and ferrous sulfide with conductivity is synthesized on the surface of the cathode, so that the resistance is further reduced, and electron transfer between the SRB and the cathode is promoted. The reacted cathode forms a biological membrane with Tissierella (the relative abundance is 41.32%) as a main dominant bacterium, and compared with an electrochemical method without a biological membrane, the bioelectrochemical method has the advantage that the degradation rate and the defluorination rate of perfluorinated compounds are remarkably improved. In addition, by optimizing the composition of the electrolyte, the degradation rate and the defluorination rate can be further improved, and the defluorination rate can reach 90% or above.

In some embodiments of the present disclosure, there is provided a bioelectrochemical sensor for measuring analyte or substrate molecule (signal) concentration in which the current (response) is insensitive to oxygen, does not require media or sensing product molecule species, including low sensitivity to interferents, and can be used to measure the concentration of an analyte or substrate molecule (signal). And includes high operational stability in both steady state response amplitude and response time.

The invention discloses a device for noninvasive regulation and control of a blood brain barrier in a non-invasive pulsed electric field. The device comprises a high-voltage pulse generator, a plurality of treatment electrodes and a fixing device. The connection tightness of endothelial cells is adjusted through a high-voltage short-pulse electric field, local regulation and control of the brain area are achieved in combination with electrode design, pulse parameters are flexibly adjusted to balance the effect and damage, and a new non-invasive physical treatment means is provided for assisting drug cross-blood-brain-barrier delivery. Compared with focused ultrasound, the multi-mechanism synergistic effect (electroporation effect and bioelectrochemical effect) is utilized instead of depending on the mechanical effect of exogenous microbubbles, so that the safety risk is remarkably reduced. The system has the advantages of noninvasiveness, safety and space flexibility, and can be opened for a long time. The non-invasive electrode is used for delivering instantaneous high-voltage electric pulses, which is different from conventional low-voltage long-time electric stimulation.

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.

A system for noninvasive regulation and control of blood brain barrier permeability through a transcranial pulsed electric field comprises a high-voltage pulse generator and a plurality of treatment electrodes. The connection tightness of endothelial cells is adjusted through a high-voltage short-pulse electric field, local regulation and control of the brain area are achieved in combination with electrode design, pulse parameters are flexibly adjusted to balance the effect and damage, and a new non-invasive physical treatment means is provided for assisting drug cross-blood-brain-barrier delivery. Compared with focused ultrasound, the multi-mechanism synergistic effect (electroporation effect and bioelectrochemical effect) is utilized instead of depending on the mechanical effect of exogenous microbubbles, so that the safety risk is remarkably reduced. The method has the advantages of noninvasiveness, high efficiency and safety, and can achieve a multi-mechanism synergistic effect. The non-invasive electrode is used for delivering instantaneous high-voltage electric pulses, which is different from conventional low-voltage long-time electric stimulation.

The present application relates to the organic wastewater and greenhouse gas carbon dioxide resource utilization, biological energy and biological electrochemical engineering cross technical field, disclose a kind of system and method for preparing middle chain fatty acid and sustainable aviation fuel in cooperation, system with organic wastewater as carbon source and electron donor, short-chain organic acid is converted into middle chain fatty acid by anaerobic microorganism carbon chain extension reaction, and is separated in situ by liquid membrane extraction and enriched;Enriched product is introduced into microbial electrosynthesis reactor, and further carbon chain extension is carried out by anode Kolbe electrolysis catalysis, and C10-C14 sustainable aviation fuel is prepared;Carbon dioxide is used as carbon source in cathode, and is converted into acetic acid by microbial catalysis, and carbon chain extension is carried out again by co-fermentation with organic wastewater.The present application realizes the synergic integration of organic wastewater treatment, carbon dioxide resource utilization and high value-added fuel preparation, and has high resource utilization degree, high carbon utilization efficiency and significant environmental benefits.

A bio-electrochemical electrode current control system for improving the performance of bio-electrochemical systems is provided. The system comprises at least a pair of bio- electrochemical electrodes disposed inside a vessel of a bio-electrochemical system. The bio- electrochemical electrodes have a large surface area in contact with an operating fluid disposed in the vessel. An electric power source is operatively connected to each pair of the at least a pair of bio-electrochemical electrodes such that in operation the bio- electrochemical electrodes of each pair of the at least a pair of bio-electrochemical electrodes have a polarity corresponding to one anode and one cathode. A polarity switching circuitry is interposed between the electric power source and each pair of the at least a pair of bio- electrochemical electrodes for simultaneously switching the polarity of the bio- electrochemical electrodes of each pair of the at least a pair of bio-electrochemical electrodes. A processor is operatively connected to the polarity switching circuitry. The processor is adapted for controlling the polarity switch such that the polarity is repeatedly switched after elapse of a preset switching time interval greater than about one second. In operation, the operating fluid is bio-electrochemically processed while the electric current is provided to each pair of the at least a pair of bio-electrochemical electrodes such that the polarity of the bio-electrochemical electrodes of each pair of the at least a pair of bio- electrochemical electrodes is repeatedly switched.

The invention relates to a microbial community optimization method for carbon dioxide reduction of a microbial electrochemical system, which is used for modifying a microbial community through a synthetic biological technology to improve the reduction capacity of the microbial community to carbon dioxide and optimizing the operation parameters of the microbial electrochemical system to improve the electron transfer efficiency. The invention also provides a microbial electrochemical system using the method, which can efficiently convert carbon dioxide into useful chemicals.

The invention discloses a semi-closed-loop microbial electrochemical device and method for purifying water and sediment, the semi-closed-loop microbial electrochemical device comprises a bacteria-algae coexistence SBR reactor, a direct current power supply, an anode and a cathode, the anode is arranged on the surface layer of the sediment and is connected with the anode of the direct current power supply through a wire, the cathode is placed in the bacteria-algae coexistence SBR reactor, and the direct current power supply is connected with the anode of the direct current power supply through a wire. A water inlet of the bacteria-algae coexistence SBR reactor is communicated with river leakage sewage through a pipeline, so that the sewage can enter the bacteria-algae coexistence SBR reactor, and a water outlet of the bacteria-algae coexistence SBR reactor extends to the vicinity of the anode through a pipeline, so that water treated by the bacteria-algae coexistence SBR reactor is discharged to the vicinity of the anode. According to the semi-closed-loop microbial electrochemical device and method, pollutants in low-concentration sewage can be effectively degraded, in-situ treatment can be synchronously carried out on bottom mud, and an effective solution is provided for river sewage leakage.

The application discloses an artificial wetland-bioelectric Fenton coupling system, which comprises, from bottom to top, a gravel layer, a biological anode carbon felt, a wetland layer and a floating electric Fenton cathode; the biological anode carbon felt is buried in the gravel layer and the wetland layer; the floating electric Fenton cathode floats on the water surface of the wetland layer; the floating electric Fenton cathode comprises an air diffusion waterproof layer and a heterogeneous Fenton catalytic layer; the floating electric Fenton cathode floats up and down with the liquid surface, has a strong oxygen enrichment function, can cancel the aeration of a traditional Fenton reaction, simultaneously needs no additional iron salt catalyst for efficient catalytic oxidation, and increases the pH range of the Fenton reaction. The application combines the artificial wetland and the bioelectric Fenton system, utilizes the interception of the artificial wetland to easily degradable organic pollutants, provides sufficient electric energy for the electric Fenton process through the bioelectrochemical method, reduces the competition of easily degradable organic matters and PPCPs to hydroxyl radicals in the electric Fenton process, and improves the degradation efficiency of the PPCPs.

It discloses a method for emergency remediating halogenated organic polluted site(s), by constructing a microelectric field driven bioelectrochemical system of engineering bacteria and auxiliary agent(s). The micro-electric field has cast iron electrode or copper zinc biochar electrode as the anode and plastic electrode as the cathode. The copper zinc biochar is produced by enriching copper, zinc in situ in watercanna, and then pyrolysizing, efficient improving electron transfer capability. By staged replacement of electrodes, showering engineering bacteria and auxiliary agents onto site(s), the sintered iron-rich biochar, which enriches iron in an iris, mediates extracellular electron transport of engineering bacteria and promotes the process of reducing dehalogenation of persistent halogenated organic pollutants. The present invention is particularly pronounced for emergency remediation and treatment of halogenated organic pollutants at halogenated contaminated sites with removal rates of more than 95%.

Bio-electrochemical process for the production of methane and / or acetate using a microbial electrolyzer and associated system. The present invention relates to a bio-electrochemical process for the production of methane and / or acetate using a microbial electrolyzer (17), said process comprising: - the oxidation of organic matter to carbon dioxide in an anodic compartment (20) of the microbial electrolyzer (17); - the reduction of carbon dioxide to methane and / or acetate depending on the pH of a catholyte (30) received in a cathodic compartment (18) of the microbial electrolyzer (17); characterized in that the process comprises adjusting the pH of the catholyte (30) to a desired value by adding carbon dioxide to the catholyte (30). Figure for the abstract: Figure 1

The utility model relates to the technical field of bioengineering, and provides an array chip integrating impedance measurement and microscopic observation, which comprises a transparent substrate, a circuit board, a 3D printing board and an electrode unit, and one side of the transparent substrate is provided with a conductive film; the circuit board is arranged on the conductive film, and a plurality of micro-channels are arranged on the circuit board in an array manner; the 3D printing plate is arranged on the side, away from the conductive film, of the circuit board, a plurality of micro-cavities are arranged on the 3D printing plate in an array mode, and the positions of the micro-cavities correspond to the positions of the micro-channels one to one; the electrode unit comprises a first electrode plate and a second electrode plate, the 3D printing plate is covered with the first electrode plate, the circuit board is surrounded by the second electrode plate, and the second electrode plate and the first electrode plate form a closed loop through a conductive film. Through innovative fusion of micromachining and bioelectrochemistry, synchronization of electrophysiology (impedance) and morphology (microscopy) is realized, and the dynamic growth process of organisms is conveniently and continuously monitored.

Micro-bioenergy system for generating electrical energy from formic acid, comprising at least one capillary tube with a semipermeable membrane for drawing in formic acid from an ant nest, a micropump for transferring the acid into a reaction cell, a reaction cell with magnesium and copper electrodes for electrochemical conversion, an energy storage device for intermediate storage of the generated energy, and a housing for integrating and protecting the components.

The invention relates to the field of bioelectrochemical sensors, in particular to an epitaxial gate type FET uric acid sensor and a uric acid concentration detection method. The FET uric acid sensor based on the epitaxial gate type comprises a field effect transistor and an epitaxial gate, the epitaxial grid electrode comprises ITO (Indium Tin Oxide) conductive glass connected with the grid electrode of the field effect transistor, an MXene / Ppy composite modification layer, a polypyrrole layer and a solution tank; the MXene / Ppy composite modification layer and the polypyrrole layer are sequentially deposited on the upper surface of the ITO conductive glass from bottom to top; the polypyrrole layer is provided with a specific imprinting cavity of uric acid to be detected; and the solution tank is arranged on the upper surface of the polypyrrole layer and is used for accommodating detection liquid. According to the invention, rapid, sensitive, accurate and low-cost detection of uric acid molecules in a low-concentration range can be realized.

The present application belongs to the technical field of sewage remediation, and particularly relates to a device and method for removing Cr(VI) in water by using a bioelectrochemical system. The device is a three-chamber double-biological-cathode electrochemical treatment structure with a cathode chamber, an anode chamber and a cathode chamber. The anode chamber is separated from the cathode chamber by proton exchange membranes on both sides, and the two cathode chambers are connected by a communication pipe. The water inlet and outlet are arranged in a stereoscopic opposite oblique angle manner, so that the wastewater has more residence time and contact area with the electrode in the bioelectrochemical treatment system. The method of the present application uses the mode that iron (II) oxidizing bacteria functional flora adheres to the cathode electrode, has strong resistance to Cr(VI), removes Cr(VI) in the solution by using the biological mineralization of Fe(II) oxidizing bacteria flora in the form of adsorption and co-precipitation, and the removal rate can reach 99.98%. Cr(VI) is removed in the cathode, and stable power generation can be realized at the same time, which is more environmentally friendly and energy-saving.

The invention discloses a method for detecting the concentration of acetic acid in an anaerobic fermentation system by using a bioelectrochemical sensor, acetic acid is detected by using the bioelectrochemical sensor, the bioelectrochemical sensor comprises a screen-printed electrode, and the working surface of the screen-printed electrode is modified with reduced graphene oxide and polymethylene blue. The working surface of the screen printing electrode is connected with acetokinase, pyruvate kinase and lactic dehydrogenase through a cross-linking agent. According to the method, the adopted sensor has better conductivity, higher response speed and higher current intensity, when the sensor is used for detecting the concentration of acetic acid in a fermentation system, the sensor has the advantages of being easy to operate, low in sample consumption, low in price, high in accurate measurement precision, high in detection speed and the like, and rapid detection of the concentration of acetic acid can be achieved; the acetic acid concentration in the anaerobic fermentation process in different periods can be timely and accurately obtained, effective data can be provided for anaerobic fermentation analysis, and the method has important significance for monitoring the process stability of anaerobic fermentation.

This invention belongs to the field of water environment treatment and restoration technology, specifically involving a method for simultaneous restoration of water bodies and sediments using a microbial electrochemical restoration device. The restoration method provided in this invention differs from traditional methods that enhance the transport of electron acceptors such as oxygen or nitrates into the sediment. Instead, it can sequentially form two reaction zones, aerobic and anaerobic, in the longitudinal section of a device. In the anaerobic zone (sediment), electrons from pollutants are directionally pumped out to the water body driven by the redox potential difference between the sediment and water phases. Therefore, pollutants in the sediment and water body can undergo oxidative degradation and reductive degradation, respectively, thereby achieving simultaneous restoration of water bodies and sediments.

The invention provides a sludge carbon-based bioelectrochemical constructed wetland for enhancing sewage denitrification. The sludge carbon-based bioelectrochemical constructed wetland comprises a wetland reactor and a circuit connecting device, the wetland reactor comprises a wetland pool as well as a water distribution layer, a lower filter material layer, an anode layer, an upper filter material layer and a cathode layer which are sequentially arranged in the wetland pool from bottom to top; the circuit connecting device comprises a power supply device and an adjustable resistor electrically connected with the power supply device; the adjustable resistor is respectively and electrically connected with the anode layer and the cathode layer through conductive wires; wherein the anode layer and the cathode layer are sludge biochar coated by a conductive metal net; the adjustable resistor is electrically connected with the conductive metal nets in the anode layer and the cathode layer through conductive wires respectively; the bioelectrochemistry-constructed wetland is coupled with the sludge biochar, and the biocompatibility and catalytic characteristics of the sludge biochar are utilized, so that the diversity and activity of microorganisms in an anode region are effectively improved, and the reduction effect of a cathode region on anions is promoted, thereby improving the removal effect on total nitrogen.

Provided is a bioelectrochemical leaching bed reactor combined with a microbial electrolysis device, the bioelectrochemical leaching bed reactor being characterized by comprising: a reactor upper part including a basket (130) for fixing the food waste; a reactor lower part for accommodating leachate generated from the reactor upper part; and the microbial electrolysis device provided in the reactor lower part, wherein the microbial electrolysis device comprises a membrane-type electrode and a voltage application unit for applying a voltage to the electrode, and the voltage application unit applies a voltage of more than 0.3 V and less than 1.2 V.