37 results about "Bioelectrochemical reactor" patented technology

The invention provides a stacked recyclable microbial electrochemical reactor and a degradation method of petroleum hydrocarbon contaminated soil, and belongs to the technical field of microbial electrochemical soil remediation. According to the stacked recyclable microbial electrochemical reactor provided by the invention, the influence range of an anode is increased through a stacked microbial electrochemical system, the movement of petroleum hydrocarbon molecules in polluted soil is accelerated through a water circulation system, and the mass transfer capacity of the soil is improved, so that the efficiency of microbial electrochemical degradation of petroleum hydrocarbon in the soil is improved from multiple angles. The invention further provides a degradation method of the petroleum hydrocarbon contaminated soil, and the degradation method is easy to operate and high in degradation efficiency of the petroleum hydrocarbon in the contaminated soil.

The invention discloses a non-diaphragm upflow type continuous flow bio-electrochemical apparatus for treating difficultly degraded waste water, which relates to an apparatus for treating waste water. The invention is used for solving the technical problems of high cost and low efficiency of BESs. A housing is fixedly connected with a base plate, a lower separator plate, a cathode, an upper separator plate, an anode and a top plate from the bottom to the top. According to the invention, present bio-electrochemical reactors are greatly improved, and according to the characteristics of waste water, the electrode positions are reasonably arranged, thereby pollutants which are difficult to be degraded in water are effectively detoxified at the cathode firstly, then the pollutants in water are further degraded by the effect of anodization, and the difficultly degraded waste water treatment efficiency is improved greatly. In addition, the invention employs a non-diaphragm design, thereby not only reducing internal resistance of the reactor, but also reducing cost, which are beneficial to the extension and engineering of the reactor.

The invention relates to a processing method of azo dye mixed pollutant wastewater, in particular to a method for removing azo dye mixed pollutant wastewater through a bio-electrochemical reactor system. The technical problems that according to an existing anaerobic organism method, the azo dye wastewater processing speed is low, the efficiency is low, and the cost of physical and chemical methods is high are solved. The method comprises the steps of setting up the bio-electrochemical reactor system; 2, performing sludge cultivation and acclimation on the bio-electrochemical reactor system; 3, operating the bio-electrochemical reactor system. The removal rates of reactor outflow water COD, inorganic nitrogen and azo dyes can reach 89%, 75% and 92% respectively, the mixed pollutant wastewater containing azo dyes can be effectively removed, and the method can be used for sewage treatment projects.

The invention provides a construction method of a microorganism electrochemical system anode biological membrane and belongs to the technical field of construction methods of anode biological membranes. The construction method comprises the following steps: directionally expanding culture on electrochemical active bacteria, collecting a microorganism sample on an anode in a bio-electrochemical reactor running steadily as an inoculation bacterium source, inoculating into a culture medium, introducing nitrogen for creating an anaerobic environment, then sealing, and culturing on a shaking table under anaerobic condition; mixing and fixing conducting particles with electrochemical active bacteria, preparing conducting particle solution, carrying out ultrasonic dispersion, then sucking a certain amount of conducting particle solution into electrochemical active bacteria solution, shaking and standing; and carrying out a filtration fixation process on the surface of an anode by a composite structure biological film. The construction method provided by the invention has the advantages that starting time and starting cycle of a biological electrochemical system are successfully shortened by constructing a composite biological film of conducting particles, electricity generation performance is greatly improved, and coulombic efficiency of the whole biological electrochemical system is also improved.

The invention provides a method for recycling copper and cadmium and preparing a cadmium bronze precursor employing a compact biological electrochemical reactor, and belongs to the technical field of bioelectrochemistry. A biological electrochemical reactor is switched into a mode of a microbial fuel cell or a microbial electrolysis cell through a relay switch; external resistors are connected in series in the mode of the microbial fuel cell; small resistors are connected in series in the mode of the microbial electrolysis cell; a power supply is externally connected; a mixed salt solution of Cu(II) and Cd(II) is enclosed into a cathode room of the reactor; a cathode and an anode of the reactor adopt conductive carbon materials; and the cathode room of the reactor is inoculated with sludge of a settling pond of a sewage treatment plant as electrochemical active microbes. The method is clean and efficient in process, compact in reactor, simple in structure and convenient to operate, and has a good application prospect in treatment of copper and cadmium wastewater treatment and preparation of the cadmium bronze precursor.

Systems and methods for treating a metal or metalloid ion-contaminated liquid are provided. The method may include (i) feeding the metal or metalloid ion-contaminated liquid into a bioelectrochemical reactor containing a bacteria selected by the cathode to produce extracellular metal or metalloid nanoparticles; and (ii) operating the bioelectrochemical reactor anaerobically to reduce the metal or metalloid ions in the metal or metalloid ion-contaminated liquid to extracellular metal or metalloid nanoparticles. The method may further include separating the metal or metalloid nanoparticles from the bacteria with no energy input. A bioelectrochemical reactor system for production of extracellular metal and metalloid nanoparticles may include a bioelectrochemical reactor, a separation device, and a tangential flow filtration unit.

The invention relates to a membrane biological electrochemical reactor device with high-quality effluent and low membrane pollution, relates to the field of sewage treatment and is used for solving the problems of serious MBR (Membrane Bio-Reactor) membrane pollution, low nitrogen removal rate, poor treatment effect on sewage which is difficult to degrade and the like. The reactor device comprises a water box, a water-inflow peristaltic pump, an MFC (Microfunction Circuit) anode chamber, a stainless steel flat plate membrane, an MBR reactor, a conducting wire, an external resistor, an aeration head, an air flowmeter, an air compressor, a vacuum pressure gauge, a backflow peristaltic pump and an effluent peristaltic pump. As the reactor device is used, the sewage firstly enters the anaerobic MFC anode, and anaerobic electricity generating microorganisms perform hydrolytic acidification pretreatment; then the sewage enters the MBR, and the partial effluent are enabled to flow back into the anaerobic anode chamber, so that the denitrification of the sewage is further performed. Therefore, the energy source recovery and in-situ utilization of the electric energy performed by the MFC, the effective control of the membrane pollution and the efficient treatment of the sewage are realized. As a result, the reactor device is obvious in economic and environmental benefits. The reactor device provided by the invention is applied to the field of the sewage treatment.

The invention discloses a bio-electrochemical reactor and an application thereof in degrading fluoronitrobenzene wastewater. The bio-electrochemical reactor comprises a bed body, wherein an electrode is arranged in the bed body, the electrode is a spiral coil type electrode which is water-permeable in a radial direction, and a water distributor which is positioned on the periphery of the spiral coil type electrode and a water outlet device which is positioned at a central position of the spiral coil type electrode are also arranged in the bed body. According to the bio-electrochemical reactor disclosed by the invention, the spiral coil type electrode is formed by winding a cathode electrode and an anode electrode which are insulated from each other, and a cathode and an anode can be used for treating pollutants synchronously so as to ensure that the treatment efficiency can be improved, operation steps can also be simplified, and the treatment cost can be reduced. Meanwhile, the water distributor is arranged on the periphery of the spiral coil type electrode, the water outlet device is arranged at the central position of the spiral coil type electrode, wastewater can be permeated to the center from the periphery of the spiral coil type electrode, and a plurality of cathode-anode groups which can be used for treating the wastewater for a plurality of times are formed in the spiral coil type electrode, so that the wastewater treatment efficiency can be greatly improved; and aiming at the fluoronitrobenzene wastewater treated by using the bio-electrochemical reactor disclosed by the invention, the fluoronitrobenzene pollutant removal rate, defluorination rate and mineralization rate can basically reach more than 90% respectively.

The invention provides a difunctional electrode with nitrification and denitrification activity and a preparing method and application thereof. A carbon-based material is used as a conducting skeleton of the electrode, an abiological catalyst is loaded on the surface of the electrode to catalyze an oxygen reduction reaction, the electrode is placed in a negative pole chamber inoculated with nitrification and denitrification activity sludge, a system is started and operates until a stable biological membrane is formed on the surface of the electrode, and therefore pollutants in sewage can be removed while electric energy is effectively recovered. The abiological catalyst is used under the oxygen condition to realize the efficient oxygen reduction reaction of the electrode, and meanwhile nitrogen in the microorganism catalyzed sewage is removed. The preparing method of the difunctional electrode is simple, the energy recovery rate of the difunctional electrode is obviously larger than that of a single biological electrode, organics and the nitrogen in the sewage are effectively removed, and the removal speed is higher than that of a single abiological electrode and the biological electrode; the electrode can be used in a microbial fuel cell or other bioelectrochemistry reactors.

The invention discloses a bioelectrochemical method for real-time and in-situ detection of BOD in organic wastewater, including 1): operating a bioelectrochemical reactor in a closed circuit in an MFC mode, and adding an inoculum solution to the anode chamber; 2): cultivating in a matrix solution Bioelectrode until the electrode biofilm matures; 3): The bioelectrochemical reactor is connected to a potentiostat to construct a bioelectrochemical sensor, and a linear voltammetry scan is performed, wherein the bioelectrode is placed in a single organic solution containing different BOD concentrations, Select the current at different potentials for fitting, determine the optimal signal output potential, and obtain the linear equation between the output current signal and the concentration of a single organic compound; 4): Obtain the linear equation between the output current signal and the concentration of each organic compound, and calculate the relative singleness of each organic compound Relative electricity production rate of organic matter; 5): Calculate the relative electricity production rate of organic wastewater, and the sensor outputs electrical signals in organic wastewater to obtain the BOD concentration of organic wastewater.

The invention discloses a quick start-up method for a bioelectrochemical process for deoxygenation of oilfield wastewater. By controlling the culture medium ratio, inoculation source, line connection, DO control and other conditions during the start-up period, effective quick enrichment and high efficiency can be realized. Electrogenic microorganisms can achieve rapid start-up of bioelectrochemical reactors. The control conditions adjust the starting substrate to be the most suitable substrate for common dominant anode microorganisms. At the same time, the use of activated sludge improves the biodiversity of the inoculum, and the control line connection forms a high-pressure screening of functional microorganisms. The control of DO is very good. It matches the demand for oxygen of the facultative microorganisms in the target functional microorganisms, and balances the demand for oxygen of the cathode.

The invention discloses a bioelectrochemical reactor for treating organic fluoride-containing wastewater and a treatment method for the organic fluoride-containing wastewater. The bioelectrochemical reactor comprises a bed body, a partition plate, a conduit, a biological cathode, a biological anode, a power supply, a water inlet and a water outlet, wherein the partition plate is vertically arranged in the bed body, and divides the bed body into a cathode chamber and an anode chamber; the bottoms of the cathode chamber and the anode chamber are communicated through the conduit; the power supply is connected with the biological cathode and the biological anode; the water inlet is formed in the cathode chamber; the water outlet is formed in the anode chamber. According to the bioelectrochemical reactor and the treatment method, the organic fluoride-containing wastewater is treated in two stages under the catalysis action of cathode and anode microorganisms, so that the treatment efficiency of the organic fluoride-containing wastewater is improved, the overall treatment cost of the organic fluoride-containing wastewater is lowered, and the problem of difficulty in the biodegradation of the organic fluoride-containing wastewater is solved.

The invention discloses a bioelectrochemical method for synchronous detection of nitrite and biochemical oxygen demand, including 1): a bioelectrochemical reactor operated in a closed circuit in MFC mode, adding an inoculum solution to an anode chamber; cultivating a bioelectrode in a substrate solution until maturity ; 2): The bioelectrochemical sensor is connected with the potentiostat to construct the bioelectrochemical sensor, and the bioelectrode is tested by cyclic voltammetry in the solution containing nitrite and BOD organic matter respectively, and the BOD in the process of the potential step chronoamperometry is selected. Organic matter and nitrite detection potential; 3): The bioelectrode performs potential step chronoamperometry in solutions containing different concentrations of nitrite and BOD organic matter, selects the signal output time point, obtains electrical response and nitrite and BOD organic matter The concentration detection marking line; according to the electrical response of the bioelectrochemical sensor in the sewage containing nitrite or the sewage containing BOD organic matter, the concentrations of nitrite and BOD organic matter in the sewage are respectively obtained.