CN114291874A - Electrochemical oxidation assisted electroporation disinfection device, method and application - Google Patents
Electrochemical oxidation assisted electroporation disinfection device, method and application Download PDFInfo
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Abstract
The invention discloses an electrochemical oxidation auxiliary electroporation disinfection device, a method and application, wherein the device comprises a water inlet tank, a peristaltic pump, an electrode fixing frame and a water outlet tank which are sequentially connected, a slender micro-nano structure modification mesh electrode and an electrochemical catalysis mesh electrode which are vertically and parallelly arranged are arranged on the electrode fixing frame, the slender micro-nano structure modification mesh electrode is electrically connected with a negative electrode of an external power supply, and the electrochemical catalysis mesh electrode is electrically connected with a positive electrode of the external power supply. The method comprises the following steps: and (3) starting the peristaltic pump and an external power supply, pumping the wastewater containing the microorganisms in the water inlet tank to the electrode fixing frame through the peristaltic pump, sequentially flowing through the slender micro-nano structure modified mesh electrode and the electrochemical catalysis mesh electrode, killing the microorganisms in the wastewater, and feeding the sterilized wastewater into the water outlet tank. The device and the method can realize high-efficiency disinfection of microorganisms with high flow rate and large flux under low operating voltage.
Description
Technical Field
The invention relates to the technical field of sewage purification, in particular to an electrochemical oxidation assisted electroporation disinfection device, method and application.
Background
China is seriously short of water resources, and the sewage recycling is an effective way for solving the problem. In the safe utilization of sewage regeneration, the biological risks caused by pathogenic microorganisms and harmful microorganisms in the regenerated water need to be focused. Disinfection is the most common treatment technique for killing microorganisms in water. However, the existing disinfection technologies, such as chlorine disinfection, ultraviolet disinfection and membrane filtration, have the problems of generating carcinogenic disinfection byproducts in the treatment process, reactivating bacteria after inactivation, consuming a large amount of electric energy and the like, and can not meet the regeneration requirement of high-quality sewage.
Disclosure of Invention
The present invention is directed to an electrochemical oxidation assisted electroporation disinfection apparatus, method and application thereof, which are used to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention adopts one of the technical schemes:
the utility model provides an electrochemistry oxidation auxiliary electroporation degassing unit, the device is including the case of intaking, peristaltic pump, electrode mount and the play water tank that connect gradually, and the vertical parallel arrangement's of installation is elongated micro-nano structure to modify netted electrode and electrochemistry catalysis netted electrode on the electrode mount, and elongated micro-nano structure modifies netted electrode and is connected with the negative pole electricity of external power supply, and electrochemistry catalysis netted electrode is connected with the positive pole electricity of external power supply.
Further, the slender micro-nano structure modified mesh electrode is as follows: and (3) growing a slender micro-nano structure in situ perpendicular to the surface of the copper wire mesh or the titanium mesh, wherein the length of the slender micro-nano structure is in a micron level, the diameter of the slender micro-nano structure is in a nanometer level, and the linear density of the slender micro-nano structure is 100/mm.
Further, the slender micro-nano structure is one or more of a nanowire, a nanotube, a nano pointed cone and a micro pointed cone.
Further, the electrochemical catalytic mesh electrode is: the ruthenium-iridium alloy double-sided modified titanium net has the ruthenium-iridium modification amount of 0.5%.
Further, the aperture of the slender micro-nano structure modified mesh electrode and the aperture of the electrochemical catalysis mesh electrode are both 10-500 mu m.
Further, the voltage of the external power supply is 2.0-5.0V.
Further, the distance between the slender micro-nano structure modified mesh electrode and the electrochemical catalysis mesh electrode is 1mm-10 cm.
The second technical scheme of the invention is as follows:
an electrochemical oxidation-assisted electroporation disinfection method using the electrochemical oxidation-assisted electroporation disinfection apparatus as claimed in any one of claims 1 to 7, the method comprising:
and (3) starting the peristaltic pump and an external power supply, pumping the wastewater containing the microorganisms in the water inlet tank to the electrode fixing frame through the peristaltic pump, sequentially flowing through the slender micro-nano structure modified mesh electrode and the electrochemical catalysis mesh electrode, killing the microorganisms in the wastewater, and feeding the sterilized wastewater into the water outlet tank.
Further, the initial concentration of microorganisms in the wastewater is 106The flow rate of the wastewater containing the microorganisms is lower than 40 mL/min.
The third technical scheme of the invention is as follows:
an electrochemical oxidation assisted electroporation disinfection device is applied to killing escherichia coli, bacillus subtilis and MS2 bacteriophage in water.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the electrochemical oxidation-assisted electroporation disinfection device, the in-situ electrochemical oxidation and the micro-nano material-assisted electroporation disinfection are organically combined together, so that a new mechanism of sequence and cooperation of electroporation firstly and electrochemical oxidation secondly is constructed. Preparing a long and thin micro-nano structure modified mesh electrode, communicating the long and thin micro-nano structure modified mesh electrode with a power supply cathode, and preparing a mesh electrochemical catalytic electrode (for generating Cl)2，H2O2Or hydroxyl radicals) and communicates with the positive electrode of the power supply. When a power supply is switched on and a lower external voltage (such as 2.0V) is controlled, microorganisms in water can realize high-efficiency disinfection treatment when the mesh electrode and the mesh electrochemical catalytic electrode are modified by the slender micro-nano structure at a high speed;
2. the electrochemical oxidation auxiliary electroporation disinfection device disclosed by the invention can realize high-efficiency disinfection of microorganisms with high flow rate and large flux under low operating voltage by combining a novel synergistic mechanism of sequential electroporation electrochemical oxidation with the flow-type mesh electrode;
3. the electrochemical oxidation auxiliary electrode of the inventionThe perforation disinfection device organically combines the in-situ electrochemical oxidation and the micro-nano material assisted electroporation disinfection together, and can completely inactivate microorganisms at a high flow rate of 40mL/min when the external voltage is 2.0V. The 1L of aquatic hygiene was completely inactivated at this time for 3J of electrical energy. While only 0.15mg/L Cl is generated in the treatment process2The potential of the extremely low chlorine-containing by-product is ensured, and the water outlet safety is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;
FIG. 2 is a schematic view of the sterilization process of the apparatus of the present invention;
FIG. 3 is a graph comparing the sterilization effect of the device of the present invention and that of the electroporation device at the same flow rate;
FIG. 4 is a graph comparing the sterilization effect of the device of the present invention and that of the electroporation device at the same voltage;
FIG. 5 is a graph comparing the sterilization effect of the device of the present invention and the electrocatalytic device at the same flow rate;
FIG. 6 is a graph showing the sterilization effect of the device of the present invention on actual sewage in a sewage plant.
In the figure, 1-water inlet tank; 2-a peristaltic pump; 3-electrode fixing frame; 4-water outlet tank; 5-modifying the mesh electrode by using a slender micro-nano structure; 6-electrochemical catalytic mesh electrode; 7-external power supply.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for the convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it should be noted that the terms "mounted" and "connected" should be interpreted broadly, for example, the term "may be used in the present invention to refer to either a fixed connection, a detachable connection, a mechanical connection, an indirect connection via an intermediate medium, or an electrical connection.
The invention adopts one of the technical schemes:
an electrochemical oxidation assisted electroporation disinfection device is shown in figures 1-2 and comprises a water inlet tank 1, a peristaltic pump 2, an electrode fixing frame 3 and a water outlet tank 4 which are sequentially connected, wherein a vertically parallel elongated micro-nano structure modified mesh electrode 5 and an electrochemical catalysis mesh electrode 6 are arranged on the electrode fixing frame 3, the elongated micro-nano structure modified mesh electrode 5 is electrically connected with a negative electrode of an external power supply 7, and the electrochemical catalysis mesh electrode 6 is electrically connected with a positive electrode of the external power supply 7.
It should be noted that the electrode fixing frame 3 may be a container, such as an electrolytic cell, a support structure capable of fixing the anode and the cathode is arranged inside the electrolytic cell, a water inlet is formed at one side of the electrolytic cell, a water outlet is formed at the other side of the electrolytic cell, the water inlet is communicated with the peristaltic pump 2, and the water outlet is communicated with the water storage tank 4; the electrode fixing frame 3 can also be a pipeline, a support structure for fixing the anode and the cathode is arranged in the pipeline, one side of the pipeline is communicated with the peristaltic pump 2, and the other side of the pipeline is communicated with the water storage tank 4.
Specifically, the elongated micro-nano structure modified mesh electrode 5 is as follows: and (3) growing a slender micro-nano structure in situ perpendicular to the surface of the copper wire mesh or the titanium mesh, wherein the slender micro-nano structure is a slender structure material with the length of micron level and the diameter of nanometer level, and the linear density of the slender micro-nano structure is 100/mm, namely the interval between every two adjacent micro-nano materials is less than 10 microns.
Specifically, the slender micro-nano structure is one or more of a nanowire, a nanotube, a nano pointed cone and a micro pointed cone.
In order to grow the slender micro-nano structure on the surfaces of the copper wire mesh and the titanium wire mesh uniformly and in situ, a thermochemical method, an electrochemical method or a hydrothermal method can be adopted, and the method specifically comprises the following steps:
1. growing a copper oxide nanowire on the surface of the copper mesh by a thermal oxidation method: firstly, a copper net containing copper with the purity of more than 99 percent is washed by 0.1mol/L hydrochloric acid and deionized water in sequence, and then the copper net is placed in a muffle furnace or a tubular electric furnace and heated for 2 hours at 400 ℃, so that copper oxide nanowires can be uniformly grown on the surface of the copper net.
2. Growing copper hydroxide nanowires on the surface of the copper mesh by an electrochemical method: firstly, a copper net with the copper purity of more than 99 percent is washed by 0.1mol/L hydrochloric acid and deionized water in sequence, then the copper net is connected with the anode of a power supply, the voltage is controlled to be 1.2V, and the copper net is electrolyzed in 3mol/L sodium hydroxide solution for 20 minutes, so that copper hydroxide nanowires can uniformly grow on the surface of the copper net.
3. Growing cobaltosic oxide nanowires on the surface of a titanium mesh by a hydrothermal method: firstly, a titanium net with the purity of more than 99 percent of titanium is sequentially washed by 0.1mol/L hydrochloric acid and deionized water, then the titanium net is placed in 1mol/L cobalt chloride solution, 0.2mol/L urea and 0.1mol/L ammonium fluoride are added, the mixture is continuously stirred for 30min and then placed in a polytetrafluoroethylene reaction kettle, and the reaction time is 4 hours in an oven at 120 ℃. After the reaction was completed, it was washed with deionized water and dried in vacuum at 70 ℃ for 10 hours. And finally, roasting the titanium mesh for 2 hours at 400 ℃ under the protection of nitrogen atmosphere, thus uniformly growing the cobaltosic oxide nanowire on the surface of the titanium mesh.
It should be noted that, the electric field intensity of the mesh electrode modified by the elongated micro-nano structure can be increased by 2 to 3 orders of magnitude, that is, the electric field intensity is increased by 100 to 1000 times, because positive and negative charges are concentrated to the tip of the elongated micro-nano structure, the electric field intensity near the tip, that is, the surface of the electrode, is increased. Because the electric field intensity on the surface of the modified electrode is improved, the probability of producing electroporation on bacteria is improved, the flow rate of water to be treated can be further improved, the sewage disinfection efficiency is improved, and the damage to the surface of the bacteria in the water to be treated is realized.
The electrochemical catalytic mesh electrode 6 is: the ruthenium-iridium alloy double-sided modified titanium net has the ruthenium-iridium modification amount of 0.5%. When 2-5V voltage is applied, the ruthenium-iridium alloy modified titanium network is subjected to oxidation reaction due to the application of voltageThe chlorine ions in the solution can be oxidized into Cl2Oxidizing water molecules to H2O2Or a hydroxyl radical.
Specifically, the aperture of the slender micro-nano structure modified mesh electrode 5 and the aperture of the electrochemical catalysis mesh electrode 6 are both 10-500 microns. If the pore diameter is less than 10 μm, clogging is easily caused, and if the pore diameter is more than 500 μm, it is not favorable for the copper mesh or titanium mesh structure to maintain certain strength and stability.
Specifically, the voltage of the external power supply 7 is 2.0-5.0V. If the voltage is lower than 2V, Cl is difficult to generate on the surface of the ruthenium-iridium alloy modified titanium mesh electrode2、H2O2Or hydroxyl radical, and if the voltage is higher than 5V, it will cause problems such as energy waste.
Specifically, the distance between the slender micro-nano structure modified mesh electrode 5 and the electrochemical catalysis mesh electrode 6 is 1mm-10cm, if the distance between the two electrodes is less than 1mm, blockage and short circuit are easily caused, and if the distance is more than 10cm, the electric field distribution between the electrodes can be influenced.
The second technical scheme of the invention is as follows:
an electrochemical oxidation assisted electroporation disinfection method, which adopts the electrochemical oxidation assisted electroporation disinfection device, comprises the following steps:
when the peristaltic pump 2 and the external power supply 7 are started, wastewater containing microorganisms in the water inlet tank 1 is pumped to the electrode fixing frame 3 through the peristaltic pump 2 and sequentially flows through the slender micro-nano structure modified mesh electrode 5 and the electrochemical catalysis mesh electrode 6, the microorganisms in the wastewater are killed, and the disinfected wastewater enters the water outlet tank 4.
Specifically, the initial concentration of the microorganisms in the wastewater is 106The flow rate of the wastewater containing the microorganisms is lower than 40 mL/min. Since the inventors only tested for a maximum flow rate of 40mL/min, higher flow rates were not tested, but it is believed that efficient inactivation could still be achieved at higher flow rates.
The third technical scheme of the invention is as follows:
an electrochemical oxidation assisted electroporation disinfection device is applied to killing escherichia coli, bacillus subtilis and MS2 bacteriophage in water.
The device and the method can be used for efficiently inactivating various microorganisms and indigenous bacteria in actual water bodies in a spectrum manner except for two tested bacteria (escherichia coli and bacillus subtilis) and viruses (MS2 bacteriophage). The microbial agent is not only suitable for treating microorganisms in sewage, but also suitable for treating microorganisms in drinking water, even liquid food, swimming pools and aquariums, as long as the microorganisms in the liquid can be disinfected.
The disinfection principle of the invention is as follows: when water containing microorganisms rapidly flows through the elongated micro-nano structure modified mesh electrode, the flow rate is high, the time is short, and although the microorganisms cannot be killed, the surfaces of the microorganisms can be harmed to a certain extent. Without subsequent treatment, these mild injuries can repair themselves and fail to cause microbial death. However, as the microorganisms further pass through the mesh-type electrochemical catalytic electrode, the bacteriostatic substances (Cl) generated on the surface of the electrode are catalyzed2Or hydroxyl radicals) can rapidly exacerbate the previously mild damage to the microorganism, resulting in cell membrane or protein coat destruction. Simultaneously generating bacteriostatic substances (Cl)2Or hydroxyl free radical) can enter the interior of the microorganism along the mild damage of the surface of the microorganism shell, and the genetic material of the microorganism is destroyed, so that the microorganism is killed, and the sterilization and disinfection of the microorganism in water are realized.
Example 1
The embodiment provides an electrochemical oxidation auxiliary electroporation disinfection device, as shown in fig. 1, the device comprises a water inlet tank 1, a peristaltic pump 2, an electrode fixing frame 3 and a water outlet tank 4 which are sequentially connected, wherein a vertically parallel elongated micro-nano structure modification mesh electrode 5 and an electrochemical catalysis mesh electrode 6 are arranged on the electrode fixing frame 3, the elongated micro-nano structure modification mesh electrode 5 is electrically connected with a negative electrode of an external power supply 7, and the electrochemical catalysis mesh electrode 6 is electrically connected with a positive electrode of the external power supply 7.
Example 2: the effect of the device of the invention is compared with that of the electroporation device alone at the same flow rate
As shown in FIG. 3, the treatment was carried out using the apparatus of the present invention and an electroporation apparatus alone, respectivelyWhen the water sample contains escherichia coli, bacillus subtilis and MS2 bacteriophage, the initial concentration of bacteria in the water sample is 106And (2) measuring the flow rate of the water sample to be treated at 40 mL/mL, and testing the disinfection and sterilization effects of the two modes when an external power supply outputs 0-2.5V voltage.
Therefore, when a water sample containing escherichia coli is treated, when the output voltage of an external power supply is less than 1V, the disinfection and sterilization effects of the two modes are the same; when the output voltage of the external power supply is more than 1V, the sterilization effect of the device is obviously better than that of the device adopting the electroporation independently, and particularly when the output voltage of the external power supply is more than 2V, the device can kill all the escherichia coli in a water sample.
When a water sample containing bacillus subtilis is treated, when the output voltage of an external power supply is less than 0.5V, the disinfection and sterilization effects of the two modes are the same; when the output voltage of the external power supply is more than 0.5V, the sterilization effect of the device is obviously better than that of the device adopting the electroporation device alone, and especially when the output voltage of the external power supply is more than 2V, the device can completely kill the bacillus subtilis in the water sample.
When a water sample containing MS2 bacteriophage is treated, when the output voltage of an external power supply is less than 1V, the disinfection and sterilization effects of the two modes are the same; when the output voltage of the external power supply is more than 1V, the sterilization effect of the device is obviously better than that of an electroporation device which is singly adopted, and especially when the output voltage of the external power supply is more than 2V, the device can completely kill MS2 bacteriophage in a water sample.
Example 3: comparison of the Effect of the device of the present invention with that of the electroporation device alone at the same Voltage
As shown in FIG. 4, when the water samples containing Escherichia coli, Bacillus subtilis and MS2 phage were treated with the device of the present invention and the electroporation device alone (i.e., without introducing electrochemical oxidation process, only using copper mesh electrode as anode, and the sterilization system only relying on electroporation sterilization), the initial concentrations of bacteria in the water samples were all 106The flow rate of a water sample to be treated is kept at 1-40mL/min, and when an external power supply outputs 2.0V voltage, the disinfection and sterilization effects of the two modes are tested。
As can be seen, when a water sample containing escherichia coli is treated, when the flow rate of the water sample is less than 6mL/min, the disinfection and sterilization effects of the two modes are the same; when the flow rate of the water sample is more than 6mL/min, the sterilization effect of the device is obviously better than that of an electroporation device which is adopted independently, and the device can still kill all the escherichia coli in the water sample.
When a water sample containing the bacillus subtilis is treated, when the flow rate of the water sample is less than 2.5mL/min, the disinfection and sterilization effects of the two modes are the same; when the flow rate of the water sample is more than 2.5mL/min, the sterilization effect of the device is obviously better than that of an electroporation device which is adopted independently, and the device can still kill all the bacillus subtilis in the water sample.
When a water sample containing MS2 bacteriophage is treated, when the flow rate of the water sample is less than 6mL/min, the disinfection and sterilization effects of the two modes are the same; when the flow rate of the water sample is more than 6mL/min, the sterilization effect of the device is obviously better than that of an electroporation device which is adopted independently, and the device can still kill all the MS2 phages in the water sample.
Example 4: the effect of the device of the invention is compared with that of the device which adopts electrocatalysis alone at the same flow rate
As shown in FIG. 5, when the water samples containing Escherichia coli, Bacillus subtilis and MS2 phage were treated with the device of the present invention and the electrocatalysis device alone (i.e., without introducing electrochemical oxidation process, only using copper mesh electrode as anode, the sterilization system only relies on electroporation sterilization), the initial concentrations of bacteria in the water samples were all 106And (2) measuring the flow rate of the water sample to be treated at 40 mL/mL, and testing the disinfection and sterilization effects of the two modes when an external power supply outputs 0-2.5V voltage.
Therefore, when a water sample containing escherichia coli is treated, when the voltage of an external power supply is greater than 0V, the sterilization effect of the device is obviously superior to that of an electrocatalysis device which is independently adopted, and especially when the voltage is greater than 2V, the device can completely kill the escherichia coli in the water sample.
When a water sample containing the bacillus subtilis is treated, when the voltage of an external power supply is less than 0.5V, the disinfection and sterilization effects of the two modes are the same; when the voltage of the external power supply is more than 0.5V, the sterilization effect of the device is obviously better than that of the device adopting an electrocatalysis mode alone, and especially when the voltage is more than 2V, the device can completely kill the bacillus subtilis in a water sample.
When a water sample containing the MS2 bacteriophage is treated, when the voltage of an external power supply is more than 0V, the sterilization effect of the device is obviously better than that of an electrocatalysis device which is independently adopted, and especially when the voltage is more than 2V, the device can completely kill the MS2 bacteriophage in the water sample.
According to the invention, when an electrochemical oxidation process is introduced, a mesh electrochemical catalytic electrode is used, and the novel technology can completely inactivate microorganisms at the high flow rate of 40mL/min under the same external voltage (2.0V). The 1L of aquatic hygiene was completely inactivated at this time for 3J of electrical energy. While only 0.15mg/L Cl is generated in the treatment process2The potential of the extremely low chlorine-containing by-product is ensured, and the water outlet safety is ensured.
Example 5: the device of the invention has the effect of treating actual sewage
As shown in FIG. 6, the wastewater from a municipal wastewater treatment plant in Beijing was collected, wherein the concentration of culturable bacteria was 8000 cells/mL. The water sample is disinfected by using the sequential electroporation electrochemical oxidation technology, and the microorganisms can be efficiently inactivated when the external voltage is 2V and the flow rate is 40 mL/min. The sewage contains indigenous bacteria, all the indigenous bacteria capable of being cultured completely die, and the treated sewage does not contain any viable bacteria.
In conclusion, the device and the method can be used for efficiently inactivating various microorganisms and indigenous bacteria in actual water bodies in a spectrum manner besides two tested bacteria (escherichia coli and bacillus subtilis) and viruses (MS2 bacteriophage). The method is not only suitable for treating microorganisms in sewage, but also suitable for treating microorganisms in drinking water, even microorganisms in liquid food, swimming pools and aquariums, as long as the microorganisms in the liquid can be disinfected.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides an electrochemistry oxidation auxiliary electroporation degassing unit, a serial communication port, the device is including the case of intaking (1), peristaltic pump (2), electrode mount (3) and play water tank (4) that connect gradually, and the vertical parallel arrangement's of installation is elongated micro-nano structure in electrode mount (3) decorates netted electrode (5) and electrochemistry catalysis netted electrode (6), and elongated micro-nano structure decorates netted electrode (5) and is connected with the negative pole electricity of external power source (7), and electrochemistry catalysis netted electrode (6) are connected with the positive pole electricity of external power source (7).
2. The electrochemical oxidation assisted electroporation disinfection apparatus of claim 1, wherein the elongated micro-nano structure modified mesh electrode (5) is: and (3) growing a slender micro-nano structure in situ perpendicular to the surface of the copper wire mesh or the titanium mesh, wherein the length of the slender micro-nano structure is in a micron level, the diameter of the slender micro-nano structure is in a nanometer level, and the linear density of the slender micro-nano structure is 100/mm.
3. The electrochemical oxidation-assisted electroporation disinfection apparatus of claim 2, wherein the elongated micro-nano structures are one or more of nanowires, nanotubes, nano-tip cones, and micro-tip cones.
4. Electrochemical oxidation assisted electroporation disinfection apparatus as claimed in claim 1, characterized in that the electrochemical catalytic mesh electrode (6) is: the ruthenium-iridium alloy double-side modified titanium net has the ruthenium-iridium modification amount of 0.5 percent.
5. The electrochemical oxidation assisted electroporation disinfection apparatus of claim 1, wherein the pore size of the elongated micro-nano structure modified mesh electrode (5) and the pore size of the electrochemical catalysis mesh electrode (6) are both 10-500 μm.
6. An electrochemical oxidation assisted electroporation disinfection apparatus as claimed in claim 1, wherein the voltage of the external power source (7) is 2.0-5.0V.
7. The electrochemical oxidation assisted electroporation disinfection apparatus of claim 1, wherein the distance between the elongated micro-nano structure modified mesh electrode (5) and the electrochemical catalysis mesh electrode (6) is 1mm-10 cm.
8. An electrochemical oxidation-assisted electroporation disinfection method using the electrochemical oxidation-assisted electroporation disinfection apparatus according to any one of claims 1 to 7, the method comprising:
when the peristaltic pump (2) and the external power supply (7) are started, wastewater containing microorganisms in the water inlet tank (1) is pumped to the electrode fixing frame (3) through the peristaltic pump (2), sequentially flows through the slender micro-nano structure modified mesh electrode (5) and the electrochemical catalysis mesh electrode (6), microorganisms in the wastewater are killed, and the disinfected wastewater enters the water outlet tank (4).
9. The electrochemical oxidation-assisted electroporation disinfection method of claim 8, wherein the initial concentration of microorganisms in the wastewater is 106The flow rate of the wastewater containing the microorganisms is lower than 40 mL/min.
10. An electrochemical oxidation assisted electroporation disinfection apparatus as claimed in any one of claims 1 to 7 for use in killing escherichia coli, bacillus subtilis and MS2 bacteriophage in water.
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| CN102531112A (en) * | 2012-02-16 | 2012-07-04 | 华南理工大学 | Portable type sterilization and water purification device of silver nano-wires |
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