37 results about "Bioelectrochemical reactor" patented technology

The invention discloses a method for processing coal gasification wastewater. The method sequentially comprises the following steps: a. carrying out preprocessing on the coal gasification wastewater in a preprocessing step comprising oil removal processing, coagulation processing and optional adjustment processing; then b. leading the preprocessed coal gasification wastewater to sequentially flowthrough a first-class bio-contact oxidation reactor, a biological electrochemical reactor, a second-class bio-contact oxidation reactor and an optional third-class or multi-class bio-contact reactor to carry out biological processing; and c. leading the biologically processed coal gasification wastewater to carry out catalytic oxidation processing in a catalytic oxidation reactor.

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 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 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 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.

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 belongs to the technical field of industrial wastewater treatment, and discloses a method for strengthening anaerobic reduction of nitrobenzene by electrochemically regulating sulfur circulation. According to the invention, an electric field regulation and control technology is introduced into a traditional anaerobic reduction system, a diaphragm-free up-flow bioelectrochemical reactor is constructed, real-time conversion of sulfate reduction product sulfides is realized through regulation and control of cathode potential, electrons are synchronously released, reduction of nitrobenzene and sulfate in a cathode region is further promoted, the toxicity inhibition of H2S is effectively reduced, the consumption of an external carbon source is reduced, and the system stability is improved. Compared with an existing treatment process, the reduction conversion rate of NB is remarkably increased in a bioelectrochemical system with sulfur metabolism conversion, and the method has a wide application prospect in wastewater treatment.

The invention relates to a sleeve type bioelectrochemical reactor for in-situ remediation of shallow groundwater polluted by chlorinated hydrocarbon, in particular to a bioelectrochemical reactor for in-situ remediation of shallow groundwater polluted by halogenated hydrocarbon. The bioelectrochemical dehalogenation technology is utilized, electrons are provided for dehalogenation breathing bacteria through the biological cathode, and completion of biological dehalogenation breathing is promoted, so that the problem that exogenous electron donors in underground water are insufficient is solved. A cathode of the reactor comprises a stainless steel cylinder with holes uniformly distributed in the surface and a carbon felt; the upper section of the bottom cylinder is of a straight cylinder structure, the lower section is of a conical cylinder structure, the upper edge of the bottom cylinder is connected with the stainless steel cylinder, and the check ball is located in the lower section of the bottom cylinder. The anode is located in the stainless steel cylinder, the PVC pipe is located between the anode and the cathode, and the anode and the cathode are electrically connected through an external direct-current power source. The device can be arranged in an in-situ monitoring well with a smaller caliber, is simple and convenient to operate, and is suitable for the characteristics of complex underground water environment and inconvenient operation conditions.

The invention discloses a purification and deodorization device for tail gas of a capped sewage pool and a deodorization method of the device. Odor related to capping of a sewage pool has the characteristics of complex components, a low concentration, a wide waste gas source, similar odor source strong components of all treatment units and the like, so that the difficulty of a subsequent deodorization process is increased. The purification and deodorization device for the tail gas of the capped sewage pool comprises an integrated electric-biological filter tank module; and the integrated electric-biological filter tank module comprises a filter tower body, a bioelectrochemical reaction unit, a biological filler circulation unit and a demister, an electrolyte solution is arranged in the filter tower body, the bioelectrochemical reactor comprises a positive electrode plate, a negative electrode plate, two flow guide plates and two partition plate groups, and the biological filler circulation unit comprises a biological medium filler, a spraying pipe and a circulation pump. An integrated electric-biological filter tower used in the invention can be used for screening dominant bacteriain a solution through an external electrode.

A bioelectrochemical reactor (1) has an anode chamber (11) having at least two bioanodes (12, 13), and an anodic electrolyte (14) with an anodic electroactive microorganisms,—a cathode chamber (21) with at least one biocathode (22), and a cathodic electrolyte (24) with a cathodic electroactive microorganisms. The anode chamber (11) is separated from the cathode chamber (21) by, running from the anode chamber to the cathode chamber, a cation exchange membrane (31) and an anion exchange membrane (32). The cation and anion exchange membranes are separated from each other by an inter-membrane chamber (30), and means for applying a potential difference between the interconnected bioanodes and the biocathode/biocathodes. The bioanodes and biocathode/biocathodes have active surfaces such that the total active surface of the biocathode/biocathodes (22) is greater than the total active surface of the two bioanodes (12, 13). The arrangement includes a method for regenerating the activity of the bioanodes of the reactor and to the use of said reactor for the electrosynthesis of organic acids and/or alcohols from organic waste.

The invention discloses a bioelectrochemical wastewater treatment device with stacked and amplified functional modules and a wastewater treatment method of the bioelectrochemical wastewater treatmentdevice, and belongs to the technical field of biological wastewater treatment. A bioelectrochemical reactor is constructed by stacking small bioelectrochemical modules, wastewater sequentially flows through all stages of modules, the pretreatment effect of biocatalysis and electrochemical catalysis on degradation-resistant wastewater can be achieved in a stage treatment and gradient removal mode,and toxicity reduction or toxicity removal of pollutants is achieved. The bioelectrochemical modules distributed by adopting surrounding type electrode arrangement has the advantages of being compactin structure and small in internal resistance, the relative distance of the electrodes is reduced, transfer of electrons and protons is facilitated, the electrodes are fully utilized, and then pollutant degradation is enhanced; and modular stacking is adopted, so that each module is a unit, gradient utilization and toxicity removal of pollutants can be achieved, microorganisms can form functionalflorae more easily, and the biodegradation effect is effectively achieved.

A method for an electrochemical device to utilize corn cob hydrolysate comprises the following steps that corn cobs are added into dilute sulphuric acid to be disinfected, and the corn cob hydrolysate is obtained after activated carbon decoloration, extraction filtration and rotary evaporation; a seed medium, catholyte, anolyte, seed washing liquid, an electron medium and DTT are prepared; disinfection is carried out on the prepared reagents, a bio-electrochemical reactor and a serum bottle; the disinfected serum bottle is fetched, the seed medium is added into the serum bottle, CO2 is led into the serum bottle, and actinobacillus succinogenes is added to be cultured to serve as a fermentative strain; centrifugation is carried out on the fermentative strain to remove the supernatant, a strain body is obtained after washing and secondary centrifugation and is added into the catholyte, then the electron medium and the corn cob hydrolysate are added into the catholyte to be mixed evenly and are connected to a cathode cavity of the bio-electrochemical reactor, and then the DTT is added into the anolyte to be mixed evenly and added into an anode cavity; chemical CO2 is led into the cathode cavity, and a product is obtained after fermentation at 37 DEG C. The method is simple, the yield is high, and the method is suitable for industrialized operation.

The invention discloses a rapid starting method of a biological electrochemistry technology for removing oxygen from oil field wastewater. The method can realize effective rapid enrichment of electrogenesis microbes by controlling the culture medium ratio, inoculation sources, line connection, DO control and other conditions, and can realize the rapid starting of a bioelectrochemical reactor. A substrate for adjusting and starting the control conditions is the most applicable substrate for common dominant anode microbes, and meanwhile, activated sludge is adopted to improve the biological diversity of inoculums, the line connection is controlled to form high-voltage screening to functional microbes, the DO control properly matches with the demand on oxygen by facultative microbes in targetfunctional microbes, and meanwhile, the demand on oxygen by a cathode is balanced.

A stacked circulatable microbial electrochemical reactor and a degradation method of petroleum hydrocarbon contaminated soil are provided, which belong to the field of microbial electrochemical soil remediation. The stacked circulatable microbial electrochemical reactor of the present disclosure expands influence range of anodes by a stacked microbial electrochemical system, accelerates the movement of the petroleum hydrocarbon molecules in the contaminated soil by a water circulation system, and improves the mass transfer capacity of soil, thereby increasing the degradation efficiency of petroleum hydrocarbon in the contaminated soil with microbial electrochemical technology from different aspects. The degradation method of petroleum hydrocarbon contaminated soil is provided. The degradation method of the present disclosure is simple in operation and has a high degradation efficiency of petroleum hydrocarbon in contaminated soil.