CN112661254B - Integrated system for efficiently and synchronously degrading organic matters, removing nitrogen and phosphorus and generating electricity - Google Patents
Integrated system for efficiently and synchronously degrading organic matters, removing nitrogen and phosphorus and generating electricity Download PDFInfo
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Abstract
The invention provides an integrated system for efficiently and synchronously degrading organic matters, removing nitrogen and phosphorus and generating electricity, and belongs to the technical field of sewage treatment. The system comprises a microbial fuel cell, a biological rotating wheel, a sludge backflow system, electric energy acquisition and control equipment and an online monitoring system, wherein the microbial fuel cell is of a single-chamber type, the driving of the biological rotating wheel mainly depends on the electric energy generated by the microbial fuel cell, an external power supply is assisted at the same time, the external power supply is started when the generated electric energy is low, the electric energy acquisition and control equipment is mainly used for collecting the electric energy generated by the microbial fuel cell and driving the biological rotating wheel, and the speed of the biological rotating wheel is controlled by a frequency converter. The invention can reduce the floor area of the wastewater treatment device, has higher wastewater treatment efficiency, has the removal rate of organic matters, ammonia nitrogen and phosphorus content of more than 80 percent, and can improve the utilization efficiency of electric energy and reduce the cost of sewage treatment by the electric energy acquisition regulation and control device.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an integrated system for efficiently and synchronously degrading organic matters, removing nitrogen and phosphorus and generating electricity.
Background
The industrial level of China is rapidly improved, the development of the economic level is greatly promoted, and the occurrence frequency of the water resource pollution problem is also increased. Organic matters, ammonia nitrogen and total phosphorus in domestic sewage and industrial wastewater are main pollution sources of water, other organisms in the water can die if the substances are directly discharged into rivers, lakes and seas, and the phosphorus is a key nutrient substance causing eutrophication of the water, so that algae can be excessively bred, the water is smelly, and serious environmental pollution is caused, so that the organic wastewater needs to be treated and discharged after reaching the standard.
The traditional organic wastewater treatment process comprises a physical method, a chemical method and an activated sludge method. The physical method has poor treatment effect, the chemical method can generate secondary pollution, the activated sludge method is a commonly used treatment method at present, organic matters are degraded by using the oxidative metabolism of microorganisms to generate carbon dioxide and water, and the secondary pollution can not be generated, but the prior process has large occupied area and complex process and needs to consume electric energy. For a sewage treatment plant, the cost of sewage treatment is high, a large amount of energy input is required, the industry with unbalanced input and output is provided, researches show that the wastewater contains a large amount of chemical energy, wherein the potential electric energy value is about 10 times of the treatment cost of the wastewater, and if 5% of the potential energy can be utilized, the problem of the cost of the wastewater treatment plant for treating the wastewater can be solved. Therefore, the development of a technology which can effectively treat the organic wastewater and can recover energy has important significance.
Microbial Fuel Cells (MFCs) utilize the oxidative metabolism of microorganisms to degrade organic matters and simultaneously generate electric energy, thereby realizing the recycling of energy. The microbial fuel cell mainly comprises an anode, a proton exchange membrane and a cathode, electrons generated by microbes reach the anode through the extracellular electron transfer process and are transferred to the cathode through an external circuit, and reduction reaction is carried out on the cathode, external oxygen and protons to generate water.
The technology is applied to the field of sewage treatment, can obviously reduce the energy consumption and can improve the efficiency of wastewater treatment.
Disclosure of Invention
The invention provides an integrated system for efficiently and synchronously degrading organic matters, removing nitrogen and phosphorus and generating electricity aiming at the problems of energy consumption and treatment efficiency in the wastewater treatment process.
The system comprises a microbial fuel cell, a biological rotating wheel, a sludge reflux system, electric energy acquisition regulation and control equipment and an online monitoring system, wherein the microbial fuel cell comprises a microbial fuel cell cavity, organic wastewater to be treated is arranged in the microbial fuel cell cavity, the microbial fuel cell cavity is provided with an anode unit and a cathode unit, the anode unit is immersed in anaerobic activated sludge, the microbial fuel cell cavity is provided with a sewage inlet, a water outlet and a sludge outlet, the biological rotating wheel comprises a supporting material, a frequency converter, a film hanging material and a rotating speed regulator, the frequency converter is connected with the rotating speed regulator, one end of the rotating speed regulator is connected with the biological rotating wheel, the other end of the rotating speed regulator is connected with a discharge control circuit and an external power supply, the electric energy acquisition regulation and control equipment comprises a data acquisition card, a charge control circuit, a storage battery, a discharge control circuit and a single chip microcomputer, and the data acquisition card is connected with the anode unit and the cathode unit of the microbial fuel cell through leads, microbial fuel cell circuit is connected to charge control circuit one end, the battery is connected to the other end, discharge control circuit one end is connected with the battery, the biological runner is connected to the other end, sewage pump and sludge pump, singlechip one end is connected with discharge control circuit, the other end is connected with the battery, sludge reflux system includes the sewage pump, the sludge pump is with the input of backward flow mud to the water inlet, on-line monitoring system includes quality of water on-line analyzer, the display screen, quality of water on-line analyzer one end inserts in the sewage, the display screen is connected to the other end.
Wherein, electrogenesis microorganism is attached to the anode unit. The anode unit is formed by connecting a plurality of anode materials in series, each anode material is composed of a current collector and a modified material, the current collector is made of a carbon fiber material, the modified material is ferric oxide hollow nano-fiber, and the nano-fiber material is prepared by an electrostatic spinning process, is flexible and has uniformly dispersed fibers.
The cathode unit is made of air cathode material, the air cathode material is composed of a conductive supporting layer, a catalyst layer and a gas diffusion layer, the conductive supporting layer is carbonized polyacrylonitrile nano-fiber, and the catalyst layer is Co 3 O 4 The gas diffusion layer is a hydrophobic surface coated by polytetrafluoroethylene emulsion.
The water quality on-line analyzer comprises a sensor A, a sensor B and a sensor C, and monitors dissolved oxygen, Chemical Oxygen Demand (COD), total nitrogen and total phosphorus in the wastewater; the sensor A is arranged in a microbial fuel cell chamber, and the sensor B and the sensor C are arranged in a rectangular chamber at the downstream of the microbial fuel cell chamber, wherein the sensor B is arranged at the biological rotating wheel, and the sensor C is arranged in an outlet area far away from the biological rotating wheel.
Aerobic sludge is arranged at the bottom in the rectangular cavity, and a biological rotating wheel is arranged above the aerobic sludge.
One-way switches are respectively arranged on the connecting lines of the sewage pump and the sludge pump.
The electric energy acquisition regulation and control equipment controls the output voltage of the biological rotating wheel; the data acquisition card is used for acquiring voltage generated in the process of degrading the organic wastewater by the microbial fuel cell; the storage battery is used for storing the electric energy generated by the microbial fuel cell; the discharge control circuit is used for supplying power to the biological rotating wheel, the sewage pump and the sludge pump; the singlechip is used for regulating and controlling the output voltage and the current of the circuit; the external power supply is used for supplying electric energy to the biological rotating wheel, the sewage pump and the sludge pump, and the external power supply is started when the voltage or the current of the discharge control circuit is lower than a rated value.
The sludge return system is used for returning the fallen sludge generated near the biological rotating wheel to the microbial fuel cell area and removing the total phosphorus through the power transmission of a sludge pump.
The support material is a polypropylene corrugated plate, and the film-forming material is a polylactic acid and polyacrylonitrile nanofiber film.
The sewage is sodium acetate, ammonium chloride, potassium dihydrogen phosphate simulated wastewater and acclimatized and cultured activated sludge thereof.
The technical scheme of the invention has the following beneficial effects:
in the scheme, the effects of synchronous nitrogen removal, phosphorus removal, organic matter degradation and electricity generation are realized, the ferric oxide hollow nanofibers are loaded on the anode material, and the electrode materials are connected in series, so that the output power is obviously improved; the biological film on the biological rotating wheel can further degrade organic matters, and the rotating speed can be adjusted, thereby being beneficial to realizing aerobic and anoxic environments and realizing the denitrification process; the data acquisition regulation and control device can realize the maximum utilization efficiency of the electric energy generated by the microbial fuel cell, can store the electric energy generated by the microbial fuel cell into the storage battery, and when the electric energy of the storage battery is insufficient, the external power supply is started to realize the power output of the biological rotating wheel, the water pump and the sludge pump, so that the electric energy can be effectively recovered, and the maximum utilization of resources is realized; has the advantages of simple preparation process, wide material selection, low cost, small occupied area and the like.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of the microstructure and electrochemical properties of the anode material of the present invention, wherein (A) is a schematic view of the composition of the anode material loaded with ferric oxide nanofibers, and (B) is PVP/FeCl prepared by electrostatic spinning 3 ·6H 2 The microstructure pattern of O nano-fiber is shown in the specification, and (C) is calcined alpha-Fe 2 O 3 A microscopic morphology picture, (D) is a microscopic morphology picture of the carbon fiber, and (E) is the carbon fiber coated with alpha-Fe 2 O 3 The later microscopic topography is that (F) is alpha-Fe 2 O 3 XRD analysis pattern of (G) carbon fiber coated with alpha-Fe 2 O 3 A later electrochemical performance map;
FIG. 3 is a schematic view of the composition of the cathode unit according to the present invention.
Wherein: 1-a water inlet, 2-electrogenesis microorganisms, 3-an anode unit, 4-a microbial fuel cell chamber, 5-a sensor A, 6-a cathode unit, 7-a charge control circuit, 8-a storage battery, 9-a singlechip, 10-a discharge control circuit, 11-a data acquisition card, 12-an external power supply, 13-a frequency converter, 14-a rotating speed regulator, 15-a display screen, 16-a sewage pump, 17-a one-way switch, 18-aerobic sludge, 19-a biological rotating wheel, 20-a sensor B, 21-a sensor C, 22-a rectangular chamber, 23-a sludge pump, 24-return sludge, 25-a sludge outlet, 26-a water outlet, 27-a conductive supporting layer and 28-a catalyst layer, 29-gas diffusion layer.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides an integrated system for efficiently and synchronously degrading organic matters, removing nitrogen and phosphorus and generating electricity.
As shown in figure 1, the system comprises a microbial fuel cell, a biological rotating wheel 19, a sludge backflow system, an electric energy collection and regulation device and an online monitoring system, wherein the microbial fuel cell comprises a microbial fuel cell chamber 4, organic wastewater to be treated is arranged in the microbial fuel cell chamber 4, the microbial fuel cell chamber 4 is provided with an anode unit 3 and a cathode unit 6, the anode unit 3 is immersed in anaerobic activated sludge, the microbial fuel cell chamber 4 is provided with a sewage inlet 1, a water outlet 26 and a sludge outlet 25, the biological rotating wheel 19 comprises a supporting material, a frequency converter 13, a film hanging material and a rotating speed regulator 14, the frequency converter 13 is connected with the rotating speed regulator 14, one end of the rotating speed regulator 14 is connected with the biological rotating wheel 19, the other end of the rotating speed regulator is connected with a discharge control circuit 10 and an external power supply 12, the electric energy collection and regulation device comprises a data acquisition card 11, a charge control circuit 7, The device comprises a storage battery 8, a discharge control circuit 10 and a single chip microcomputer 9, a data acquisition card 11 is connected with an anode unit 3 and a cathode unit 6 of the microbial fuel cell through wires, one end of a charge control circuit 7 is connected with the microbial fuel cell circuit, the other end of the charge control circuit is connected with the storage battery 8, one end of the discharge control circuit 10 is connected with a storage battery 8, the other end of the discharge control circuit is connected with a biological runner 19, a sewage pump 16 and a sludge pump 23, one end of the single chip microcomputer 9 is connected with the discharge control circuit 10, the other end of the single chip microcomputer is connected with the storage battery 8, a sludge backflow system comprises the sewage pump 16 and the sludge pump 23, the sludge pump 23 inputs backflow sludge 24 into a water inlet 1, an online monitoring system comprises a water quality online analyzer and a display screen 15, one end of the water quality online analyzer is inserted into sewage, and the other end of the display screen 15 is connected with the display screen.
Wherein, electrogenesis microorganism 2 is attached on the anode unit 3; the anode units 3 are at least one anode material connected in series, each anode material is composed of a current collector and a modified material, the current collector is made of a carbon fiber material, the modified material is ferric oxide hollow nano-fiber, the nano-fiber material is prepared by an electrostatic spinning process, and the flexible and uniform fiber dispersion is realized.
The cathode unit 6 is made of an air cathode material, as shown in fig. 3, the air cathode material is composed of a conductive support layer 27, a catalyst layer 28 and a gas diffusion layer 29, the conductive support layer 27 is carbonized polyacrylonitrile nanofiber, and the catalyst layer 28 is Co 3 O 4 The gas diffusion layer 29 is a hydrophobic surface coated with polytetrafluoroethylene emulsion.
The water quality online analyzer comprises a sensor A5, a sensor B20 and a sensor C21, and the water quality online analyzer monitors dissolved oxygen, Chemical Oxygen Demand (COD), total nitrogen and total phosphorus in wastewater; the sensor a5 is disposed in the microbial fuel cell chamber 4, and the sensor B20 and the sensor C21 are disposed in the rectangular chamber 22 downstream of the microbial fuel cell chamber 4, wherein the sensor B20 is disposed at the bio-wheel 19, and the sensor C21 is disposed in a region away from the water outlet 26 of the bio-wheel 19.
And one-way switches 17 are respectively arranged on the connecting lines of the sewage pump 16 and the sludge pump 23.
The working principle of the microbial fuel cell is as follows: the organic wastewater firstly enters a microbial fuel cell area, the microbial fuel cell consists of an anode unit 3, a cathode unit 6 and a microbial fuel cell chamber 4, wherein the anode unit 3 is inserted into the anaerobic substrate area, the anode unit consists of a plurality of small electrode materials which are connected with the cathode unit 6 in series, the microbial fuel cell area is equivalent to a plurality of cells, the anode unit 3 is carbon fiber loaded ferric oxide hollow nano fibers, electricity generating microorganisms 2 are gradually attached to the anode unit 3, electrons are generated in the process of degrading organic matters and are firstly transferred to the surface of the anode unit 3 and are transferred to the cathode unit 6 through a conducting wire between the anode unit 3 and the cathode unit 6, one surface of the cathode unit 6 on the top of the organic wastewater is in direct contact with air, the other surface of the cathode unit 6 is in contact with the organic wastewater, and a reduction reaction is carried out on the cathode unit 6 to form a complete extracellular electron transfer path, wherein the cathode unit 6 is coated with a catalyst to accelerate the oxygen reduction reaction rate, the catalyst being Co 3 O 4 The microbial fuel cell area contains a sensor A5 for analyzing COD, ammonia nitrogen and total phosphorus content in sewage, and the microbial fuel cell area contains a water inlet 1 and delivers the water to a biological runner 19 through a sewage pump 16 at a water outlet.
The data acquisition regulation and control system comprises a data acquisition card 11, a charge control circuit 7, a storage battery 8, a singlechip 9, a discharge control circuit 10 and a charge control circuit 7, wherein the charge control circuit 7 is respectively connected with an anode unit 3 and a cathode unit 6 and used for collecting electric energy and storing the electric energy into the storage battery 8, the data acquisition card 11 is arranged between the anode unit 3 and the cathode unit 6 and used for recording the generated electric energy, the data acquisition card 11 records data every 1min and transmits the data to a computer display screen 15, the singlechip 9 is used for adjusting output voltage or current during discharge, energy is saved to the maximum extent and is transmitted to electric equipment through the discharge control circuit 10, the storage battery 8 continuously stores the electric energy, the singlechip can adjust proper output power for starting the electric equipment, the output power is controlled to be not lower than 0.3W and not lower than 3V, when the output power is monitored to be lower than 0.3W, the external power supply 12 is started, the storage battery 8 stops supplying power, and the starting is started when the charging voltage is higher than 0.3W.
The sewage on-line monitoring system is used for recording COD, ammonia nitrogen and total phosphorus indexes in sewage in real time and selecting the sewage retention time according to the treatment efficiency.
The sludge reflux system is a sludge reflux process from the aerobic zone to the anaerobic zone, the sludge pump 23 is selectively started according to the content of phosphorus fed back by a sensor A5 of the anaerobic zone, if the content of phosphorus in wastewater in the anaerobic zone is low, the sludge pump 23 is started to supplement phosphorus, and if the content of phosphorus is enough, the sludge enters a subsequent treatment process.
The biological rotating wheel comprises a supporting framework, a film forming material, a frequency converter 13 and a rotating speed regulator 14, and the working principle is as follows: the waste water after anaerobic treatment enters a rectangular cavity, a biological rotating wheel is positioned in the rectangular cavity, the speed of the rotating wheel is adjusted through a rotating speed regulator, the speed of the rotating wheel is usually 0.5-2r/min, oxygen in the air can be brought into the waste water through the rotation of the rotating wheel, an aerobic and anoxic environment is realized, a film forming filler is a composite fiber film of polylactic acid and polyacrylonitrile, microorganisms form a film on the surface of the nanofiber film, the thickness of the biofilm is about 0.1-0.5mm, the organic waste water is continuously degraded by the biofilm, the residual organic matters in the microbial fuel cell can be further removed, and the denitrification process is realized at the same time.
The preparation method of the ferric oxide hollow nano-fiber in the anode unit comprises the following steps: firstly, polyvinylpyrrolidone and FeCl are mixed 3 ·6H 2 Dissolving O in DMF at the mass ratio of 1:1.2, stirring at normal temperature for 24h, and preparing the nano-fiber alpha-Fe by using an electrostatic spinning technology after uniformly stirring 2 O 3 Controlling spinning voltage to be +18kV and-2 kV, controlling the size of a spinning needle to be 23#, the receiving distance to be 15cm and the receiving speed to be 30r/min, stripping the nanofiber membrane from aluminum foil paper after spinning is finished, drying the nanofiber membrane for 8h in a vacuum drying oven, cutting a small piece of nanofiber membrane, putting the nanofiber membrane into a porcelain boat, carrying out high-temperature calcination treatment in a muffle furnace, controlling the calcination temperature to be 500 ℃, the heating rate to be 1 ℃/min, keeping the temperature at 500 ℃ for 1h, and then reducing the temperature to the normal temperature at the speed of 2 ℃/min, thus obtaining the alpha-Fe 2 O 3 And (3) nano fibers. Then the prepared alpha-Fe 2 O 3 The nano-fiber is coated on the surface of the carbon fiber according to the coating density of 2mg/cm 2 Weighing alpha-Fe 2 O 3 Dissolving the nano-fibers in ethanol, using Nafion as a binder, uniformly dripping the Nafion and the ethanol solution in a mass fraction of 1%, and drying to obtain the anode material.
Analysis was performed as in fig. 2; FIG. A shows that the surface of carbon fiber is loaded with alpha-Fe 2 O 3 The nanofiber is provided with a schematic diagram of electricity-generating microorganisms attached to the surface of the material; FIG. B shows PVP/FeCl prepared by electrostatic spinning 3 The nanofiber membrane has smooth fiber surface and uniform dispersion; FIG. C is a view showing calcined alpha-Fe 2 O 3 The nano-fibers can be seen as hollow tubular structures, are short fibers and can be used as nano-wires for electron transfer; FIG. D shows pure carbon fiber, unloaded with alpha-Fe 2 O 3 When the nano fiber is adopted, the surface of the material is smooth; FIG. E shows carbon fiber loaded with alpha-Fe 2 O 3 The microscopic appearance of the nanofiber shows that the nanofiber on the surface of the carbon fiber can be seen. FIG. F is a view of alpha-Fe 2 O 3 The crystal phase of the nano-fiber, and the prepared sample is high-purity alpha-Fe 2 O 3 The product crystal phase peaks at 24.2 °, 33.2 °, 35.7 °, 40.9 °, 49.5 °, 54.1 °, 57.6 °, 62.5 °,64.0 °,72.2 °,75.5 ° and the corresponding crystal planes are (012), (104), (110), (113), (024), (116), (018), (214), (300), (119), (220), respectively. Graph G shows pure carbon fiber and loaded alpha-Fe 2 O 3 Electrochemical testing of the nanofiber can show that alpha-Fe is passed 2 O 3 After the nanofiber modification, the electrochemical performance of the material is obviously improved.
The preparation method of the cathode unit 6: the cathode unit 6 serves as an important region where oxygen reduction reaction occurs, reduces the overpotential of the cathode, and helps to accelerate the oxygen reduction reaction rate, and the cathode unit 6 is placed in the air on one side and in contact with water on the other side, and the cathode unit 6 includes a conductive support layer 27, a catalyst layer 28, and a gas diffusion layer 29 in fig. 3. Adding 12% of PAN into DMF, stirring uniformly, preparing the nanofiber membrane by using an electrostatic spinning technology, wherein the spinning voltage is +15kV and-2 kV respectively, the spinning distance is 15cm, the needle head is 20#, and pressing the prepared nanofiber membrane into a membrane with the thickness of about 1.5mm by using a laminating machine so as to improve the mechanical strength. Then the temperature is raised to 260 ℃ at the heating rate of 2 ℃/min and kept for 1h, belonging to the pre-oxidation process, aiming at converting a linear molecular chain into a heat-resistant trapezoid six-membered ring structure so as to ensure that the PAN fiber is not melted and is not combusted during high-temperature carbonization and keep the fiber shape. Then calcining the preoxidized nanofiber membrane in a tubular furnace at the heating rate of 2 ℃/min for 1h under the protection of Ar at the calcining temperature of 900 ℃, naturally cooling to room temperature, taking the carbonized nanofiber membrane as a conductive supporting layer, taking a Nafion solution as an adhesive, coating a catalyst on one surface of the conductive supporting layer, wherein the catalyst is Co 3 O 4 The amount of catalyst applied was 0.5mg/cm 2 And preparing a catalyst layer. And then uniformly brushing PTFE emulsion on the other surface of the conductive supporting layer to be used as a gas diffusion layer, brushing for 4 times, and drying to obtain a prepared material to be used as a cathode unit 6.
Test experiments:
the initial COD of the prepared organic wastewater is 600mg/L, the concentration of ammonia nitrogen is 30mg/L, the concentration of total phosphorus is 5mg/L, the wastewater is utilized to firstly domesticate activated sludge, the domesticated activated sludge grows on an anode unit in a suction filtration mode, meanwhile, a little activated sludge is added in a microbial fuel cell and a biological rotating wheel area to increase the impact load of the wastewater, the organic wastewater with the above concentration is added in the microbial fuel cell, nitrogen is introduced for 10min to discharge oxygen in the organic wastewater, an online monitoring system and an electric energy acquisition regulation and control system are simultaneously started, when the COD in the organic wastewater is reduced to 150mg/L, the organic wastewater is conveyed to the biological rotating wheel area through a sewage pump, a frequency converter is simultaneously started, the speed of a rotating wheel is regulated through a speed regulator, the removal conditions of the COD and the ammonia nitrogen in the organic wastewater are observed in real time through the online monitoring system, after 2 days, the COD in the wastewater is lower than 50mg/L, the ammonia nitrogen concentration is lower than 10mg/L, the total phosphorus concentration is lower than 1mg/L, the removal rate of the COD is 92%, the removal rate of the ammonia nitrogen is 73.3%, the removal rate of the total phosphorus is 82%, the coulombic efficiency is 32.2%, the length, the width and the height of an anode cavity are 10cm, 5cm and 10cm respectively, and the electric energy generated in one water inlet and outlet period is 49717C.
TABLE 1 organic waste water removal
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.
Claims (5)
1. The utility model provides an integrated system of high-efficient synchronous degradation organic matter, nitrogen and phosphorus removal and power generation which characterized in that: comprises a microbial fuel cell, a biological rotating wheel (19), a sludge reflux system, electric energy acquisition regulation and control equipment and an online monitoring system, wherein the microbial fuel cell comprises a microbial fuel cell chamber (4), organic wastewater to be treated is arranged in the microbial fuel cell chamber (4), the microbial fuel cell chamber (4) is provided with an anode unit (3) and a cathode unit (6), the anode unit (3) is immersed in anaerobic activated sludge, the microbial fuel cell chamber (4) is provided with a sewage inlet (1), a water outlet (26) and a sludge outlet (25), the biological rotating wheel (19) comprises a supporting material, a frequency converter (13), a film-hanging material and a rotating speed regulator (14), the frequency converter (13) is connected with the rotating speed regulator (14), one end of the rotating speed regulator (14) is connected with the biological rotating wheel (19), and the other end of the rotating speed regulator is connected with a discharge control circuit (10) and an external power supply (12), the electric energy collection regulation and control equipment comprises a data collection card (11), a charge control circuit (7), a storage battery (8), a discharge control circuit (10) and a single chip microcomputer (9), wherein the data collection card (11) is connected with an anode unit (3) and a cathode unit (6) of the microbial fuel cell through leads, one end of the charge control circuit (7) is connected with the microbial fuel cell circuit, the other end of the charge control circuit is connected with the storage battery (8), one end of the discharge control circuit (10) is connected with the storage battery (8), the other end of the discharge control circuit is connected with a biological rotating wheel (19), a sewage pump (16) and a sludge pump (23), one end of the single chip microcomputer (9) is connected with the discharge control circuit (10), the other end of the single chip microcomputer is connected with the storage battery (8), a sludge backflow system comprises the sewage pump (16) and the sludge pump (23), the sludge pump (23) inputs backflow sludge (24) into a water inlet (1), and an online monitoring system comprises an online water quality analyzer, One end of the water quality on-line analyzer is inserted into the sewage, and the other end of the water quality on-line analyzer is connected with the display screen (15);
electrogenic microorganisms (2) are attached to the anode unit (3);
the anode units (3) are at least one anode material connected in series, each anode material is composed of a current collector and a modified material, the current collector is made of a carbon fiber material, the modified material is ferric oxide hollow nano-fiber, the nano-fiber material is prepared by an electrostatic spinning process, and the anode units are flexible and the fibers are uniformly dispersed;
the cathode unit (6) is made of an air cathode material, the air cathode material is composed of a conductive supporting layer (27), a catalyst layer (28) and a gas diffusion layer (29), the conductive supporting layer (27) is carbonized polyacrylonitrile nanofiber, and the catalyst layer (28) is Co 3 O 4 The gas diffusion layer (29) is a hydrophobic surface coated by polytetrafluoroethylene emulsion;
the water quality on-line analyzer comprises a sensor A (5), a sensor B (20) and a sensor C (21), and monitors dissolved oxygen, Chemical Oxygen Demand (COD), total nitrogen and total phosphorus in the wastewater; the sensor A (5) is arranged in the microbial fuel cell chamber (4), and the sensor B (20) and the sensor C (21) are arranged in a rectangular chamber (22) at the downstream of the microbial fuel cell chamber (4), wherein the sensor B (20) is arranged at the biological rotating wheel (19), and the sensor C (21) is arranged in a water outlet (26) area far away from the biological rotating wheel (19);
aerobic sludge (18) is arranged at the bottom in the rectangular cavity (22), and a biological rotating wheel (19) is arranged above the aerobic sludge (18).
2. The integrated system for efficiently and synchronously degrading organic matters, removing nitrogen and phosphorus and generating electricity according to claim 1 is characterized in that: and one-way switches (17) are respectively arranged on the connecting lines of the sewage pump (16) and the sludge pump (23).
3. The integrated system for high-efficiency synchronous degradation of organic matters, nitrogen and phosphorus removal and power generation as claimed in claim 1, is characterized in that: the electric energy acquisition regulation and control equipment controls the output voltage of the biological rotating wheel (19); the data acquisition card (11) acquires voltage generated in the process of degrading the organic wastewater by the microbial fuel cell; the storage battery (8) stores the electric energy generated by the microbial fuel cell; the discharge control circuit (10) supplies power to the biological rotating wheel (19), the sewage pump (16) and the sludge pump (23); the singlechip (9) regulates and controls the output voltage and the current of the circuit; the external power supply provides electric energy for the biological rotating wheel (19), the sewage pump (16) and the sludge pump (23), and the external power supply is started when the voltage or the current of the discharge control circuit (10) is lower than a rated value.
4. The integrated system for high-efficiency synchronous degradation of organic matters, nitrogen and phosphorus removal and power generation as claimed in claim 1, is characterized in that: the support material is a polypropylene corrugated plate, and the film-forming material is a polylactic acid and polyacrylonitrile nanofiber film.
5. The integrated system for high-efficiency synchronous degradation of organic matters, nitrogen and phosphorus removal and power generation as claimed in claim 1, is characterized in that: the sewage is sodium acetate, ammonium chloride, potassium dihydrogen phosphate simulated wastewater and acclimatized and cultured activated sludge thereof.
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| WO2017046341A1 (en) * | 2015-09-18 | 2017-03-23 | MWK Bionik GmbH | Biofuel cell and combination thereof with a microbial emission sink |
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| CN102276064A (en) * | 2011-07-18 | 2011-12-14 | 北京师范大学 | Anaerobic-aerobic integrated microbial fuel cell wastewater treatment system |
| CN202968243U (en) * | 2012-12-20 | 2013-06-05 | 北京安力斯环境科技有限公司 | Aerating system of sewage oxidation ditch |
| CN103123977A (en) * | 2013-03-07 | 2013-05-29 | 浙江工商大学 | Simultaneous nitrogen and phosphorus removal microbial fuel cell |
| CN104817175A (en) * | 2015-04-29 | 2015-08-05 | 深圳北航新兴产业技术研究院 | Method for reinforcing sewage denitrification and dephosphorization efficiency and simultaneously generating electricity |
| WO2017046341A1 (en) * | 2015-09-18 | 2017-03-23 | MWK Bionik GmbH | Biofuel cell and combination thereof with a microbial emission sink |
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