CN109384291B - Plasma and pulse electric field combined sterilization device and method - Google Patents
Plasma and pulse electric field combined sterilization device and method Download PDFInfo
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- CN109384291B CN109384291B CN201811558795.2A CN201811558795A CN109384291B CN 109384291 B CN109384291 B CN 109384291B CN 201811558795 A CN201811558795 A CN 201811558795A CN 109384291 B CN109384291 B CN 109384291B
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- 230000001954 sterilising effect Effects 0.000 title claims abstract description 96
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 81
- 230000005684 electric field Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 238000009832 plasma treatment Methods 0.000 claims abstract description 15
- 239000013543 active substance Substances 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 69
- 239000000919 ceramic Substances 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 12
- 230000004888 barrier function Effects 0.000 claims description 8
- 229920005372 Plexiglas® Polymers 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 2
- 241000894006 Bacteria Species 0.000 description 19
- 230000000694 effects Effects 0.000 description 14
- 239000007789 gas Substances 0.000 description 8
- 210000004027 cell Anatomy 0.000 description 6
- 241000588724 Escherichia coli Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011149 active material Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/305—Treatment of water, waste water, or sewage by irradiation with electrons
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a plasma and pulse electric field combined sterilization device and method, wherein the device comprises: the plasma sterilizing device is used for uniformly discharging the bacteria-carrying liquid to generate active substances for sterilization and obtaining the bacteria-carrying liquid after plasma treatment; the pulse electric field device is connected with the plasma sterilization device and is used for generating transmembrane voltage on the inner side and the outer side of spores of the bacteria-carrying liquid after plasma treatment under the action of an electric field so as to kill the spores after the transmembrane voltage is accumulated to a preset threshold value, and finally sterilized bacteria-carrying liquid is obtained. The device uses plasma to process and then kills by the pulse electric field by combining the plasma sterilizing device and the pulse electric field device, so that the sterilizing effect is far higher than that of the single action, and the processing efficiency is improved.
Description
Technical Field
The invention relates to the technical field of water sterilization, in particular to a plasma and pulse electric field combined sterilization device and method.
Background
There are many plasma means for killing bacterial pathogens in water, and many researchers in the related art have proposed methods for killing bacteria in water using plasma or pulsed electric fields, but most methods are directed to bacteria with weak resistance such as escherichia coli. The spore in the bacteria with stronger resistance has extremely low water content, and the outer film has complex structure, so that the effect of singly using a pulse electric field or plasma treatment is not ideal, and the effect is poor.
When the plasma is singly acted in the liquid, the plasma reacts with water to generate active substances, and when the active substances are transmitted to the cell surface through liquid diffusion, the process greatly weakens the treatment effect of the plasma. And spores and the like have special outer surface structures, so that active substances are more difficult to enter, and the sterilization effect is quite unsatisfactory. When a pulsed electric field is applied alone to treat bacteria such as Escherichia coli which are relatively weak in resistance, it is difficult to polarize the bacteria such as spores due to a low water content, and thus a sufficient transmembrane voltage cannot be generated to destroy the cells.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, an object of the present invention is to provide a plasma and pulsed electric field combined sterilization apparatus.
Another object of the present invention is to provide a method for sterilizing a plasma in combination with a pulsed electric field.
In order to achieve the above object, according to one aspect of the present invention, there is provided a plasma and pulsed electric field combined sterilization apparatus comprising: the plasma sterilization device is used for uniformly discharging the bacteria-carrying liquid to generate active substances for sterilization and obtain the bacteria-carrying liquid after plasma treatment; the pulse electric field device is connected with the plasma sterilization device and is used for generating transmembrane voltage on the inner side and the outer side of spores of the bacteria-carrying liquid after plasma treatment under the action of an electric field so as to kill the spores after the transmembrane voltage is accumulated to a preset threshold value and obtain the bacteria-carrying liquid after final sterilization.
According to the plasma and pulse electric field combined sterilization device disclosed by the embodiment of the invention, bacteria are charged through the front-stage plasma discharge, and the rear-stage pulse electric field enables the bacteria to generate transmembrane voltage to damage cell structures, so that the combined sterilization effect is achieved, the effect of killing the strong-resistance bacteria of spores is remarkable, the sterilization effect is strong, the treatment speed is high, and the treatment capacity is large.
In addition, the sterilization device combining plasma and pulsed electric field according to the above embodiment of the present invention may further have the following additional technical features:
further, in one embodiment of the invention, the plasma sterilization device adopts a multi-layer flat dielectric barrier discharge structure, and the surface coating is porous ceramic, so that active substances are generated by large-area uniform discharge.
Optionally, in one embodiment of the present invention, further includes:
The first power supply assembly is connected with the plasma sterilization device to provide power supply of a high-frequency narrow pulse power supply meeting a first preset condition;
The second power supply assembly is connected with the pulse electric field device to provide low-bandwidth pulse power supply meeting a second preset condition.
Further, in one embodiment of the present invention, the plasma sterilization apparatus includes: the device comprises a first water tank, a first water inlet, a first water outlet, a gas blowing port, a porous gas blowing plate, a storage chamber, a first electrode, porous ceramics, a grounding bus, a high-voltage bus and a vent hole.
Optionally, in one embodiment of the present invention, the pulsed electric field device includes: the second water inlet, the second water outlet, the second water tank and the second electrode.
Further, in one embodiment of the present invention, the first water tank and the second water tank are both plexiglas water tanks, providing a sterilization site for the bacteria-carrying liquid.
Further, in an embodiment of the present invention, the bacteria-carrying liquid flows in from the first water inlet, the bacteria-carrying liquid after the plasma treatment flows out from the first water outlet, then flows into the pulsed electric field device from the second water inlet for further sterilization, and after the final sterilized bacteria-carrying liquid is obtained, the liquid flows out from the second water outlet.
Further, in one embodiment of the present invention, the porous ceramic covers the outer surface of the first electrode to constitute a dielectric barrier discharge.
Further, in one embodiment of the present invention, a piece of the second electrode is disposed at both sides of the second water tank to be connected to the second power supply assembly to generate pulsed electric field sterilization.
In order to achieve the above object, another aspect of the present invention provides a method for sterilizing a plasma and a pulsed electric field, comprising: uniformly discharging the bacteria-carrying liquid to generate active substances for sterilization, and obtaining the plasma-treated bacteria-carrying liquid; under the action of an electric field, generating a transmembrane voltage on the inner side and the outer side of the spores of the bacteria-carrying liquid after the plasma treatment so as to kill the spores after the transmembrane voltage is accumulated to a preset threshold value, and obtaining the final sterilized bacteria-carrying liquid.
According to the plasma and pulse electric field combined sterilization method disclosed by the embodiment of the invention, bacteria are charged through the front-stage plasma discharge, and the latter-stage pulse electric field enables the bacteria to generate transmembrane voltage to damage cell structures, so that the combined sterilization effect is achieved, the effect of killing the strong-resistance bacteria of spores is remarkable, the sterilization effect is strong, the treatment speed is high, and the treatment capacity is large.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a plasma and pulsed electric field combined sterilization apparatus according to one embodiment of the present invention;
FIG. 2 is a schematic view showing a structure of a plasma sterilizing apparatus in a sterilizing apparatus using a plasma and a pulsed electric field according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a pulsed electric field device in a plasma and pulsed electric field combined sterilization apparatus according to an embodiment of the present invention;
fig. 4 is a flow chart of a plasma and pulsed electric field combined sterilization apparatus according to one embodiment of the present invention.
Reference numerals illustrate:
10-plasma and pulse electric field combined sterilization device, 100-plasma sterilization device, 101-first water tank, 102-first water inlet, 103-first water outlet, 104-air blast port, 105-porous air blast plate, 106-storage chamber, 107-first electrode, 108-porous ceramic, 109-grounding bus, 110-high voltage bus, 111-exhaust hole, 200-pulse electric field device, 201-second water inlet, 202-second water outlet, 203-second water tank 204-second electrode, 300-first power supply assembly and 400-second power supply assembly.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The plasma and pulsed electric field combined sterilization apparatus and method according to the embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a plasma and pulsed electric field combined sterilization apparatus according to an embodiment of the present invention.
As shown in fig. 1, the plasma and pulsed electric field combined sterilization apparatus 10 includes: a plasma sterilization apparatus 100 and a pulsed electric field apparatus 200.
As shown in fig. 2, the plasma sterilization apparatus 100 is configured to uniformly discharge a bacteria-carrying liquid to generate an active material for sterilization, thereby obtaining a plasma-treated bacteria-carrying liquid.
Further, the plasma sterilization apparatus includes: the air conditioner comprises a first water tank 101, a first water inlet 102, a first water outlet 103, an air blowing port 104, a porous air blowing plate 105, a storage chamber 106, a first electrode 107, porous ceramics 108, a grounding bus 109, a high-voltage bus 110 and an air exhaust hole 111.
Further, in one embodiment of the invention, the plasma sterilization device adopts a multi-layer flat dielectric barrier discharge structure, and the surface coating is porous ceramic, so that active substances are generated by large-area uniform discharge. Wherein the porous ceramic covers the outer surface of the first electrode to constitute a dielectric barrier discharge.
Further, the bottom of the plasma sterilizing device is provided with an air passage, oxygen, air, rare gas and the like can be blown in, so that the voltage of the generated plasma is further reduced, and meanwhile, active substances generated by the plasma and liquid are fully and uniformly mixed, and the sterilizing effect is improved. In addition, the air blowing device of the plasma sterilizing device is used for introducing air into the liquid to be treated so as to further improve the sterilizing effect.
Specifically, the first water tank 101 is a plexiglass water tank that is the main site for plasma treatment of the bacteria-carrying liquid; the first water inlet 102 into which the bacteria-laden liquid flows; the first water outlet 103 is used for discharging the bacteria-carrying liquid; a gas blowing port 104 for blowing gas into the storage chamber from the port, wherein the gas flow rate is 0.01-1L/min; a porous aeration plate 105, which is made of porous material, allows gas to pass through, and liquid cannot pass through, so that a large number of uniform fine bubbles are generated on the plate surface after aeration. The air storage chamber 106 is used for uniformly dispersing the air pressure of the air to the bottom of the whole water tank, so that the air can be uniformly generated on the whole ground during ventilation; the first electrode 107 is made of metal material, and the distance between the electrodes is 4mm-20mm; the porous ceramic 108 is covered on the outer surface of the metal electrode to form a dielectric barrier discharge structure, so that uniform discharge can be generated, and the contact area between the discharge and water is larger. The treatment efficiency is improved, and the thickness of the ceramic can be 0.2-1mm; all the ground electrodes of the ground bus 109 are connected to the ground bus 109, i.e. the bus is connected to ground; the high-voltage bus 110, all high-voltage electrodes are connected on the high-voltage bus 110, and the high-voltage bus 110 is connected with a high-frequency narrow pulse power supply, wherein the power supply parameters of the high-frequency narrow pulse power supply can include: the voltage peak value is 20kV-50kV, the frequency is 100Hz-13.56MHz, and the pulse width is 100ns-10us; the vent hole 111 vents excess gas from the tank.
As shown in fig. 3, the pulsed electric field device 200 is connected to the plasma sterilization device 100, and the pulsed electric field device 200 is configured to generate a transmembrane voltage on the inner and outer sides of spores of the bacteria-carrying liquid after plasma treatment under the action of an electric field, so as to kill the spores after the transmembrane voltage is accumulated to a preset threshold value, and obtain the bacteria-carrying liquid after final sterilization.
Further, the pulsed electric field device 200 includes: a second water inlet 201, a second water outlet 202, a second water tank 203 and a second electrode 204.
Specifically, the second water inlet 201, the bacteria-carrying liquid flows out from the first water outlet 103 of the plasma part and flows into the pulsed electric field part for treatment. And a second water outlet 202, and the liquid treated by the pulsed electric field is discharged from the second water outlet 202. The second tank 203 is a plexiglass tank, and is loaded with the liquid after the pulsed electric field treatment, and is the main place where the pulsed electric field acts. The second electrode 204 is provided with a metal electrode at two sides of the water tank, and is connected to a low-bandwidth pulse power supply for generating a pulse electric field for sterilization, wherein the distance between the electrodes is 4mm-20mm, and the power supply parameters can be as follows: the peak voltage is 20kV-50kV, the frequency is 0.1-100Hz, and the pulse width is 10us-100ms.
The plasma and pulsed electric field combined sterilization apparatus 10 further includes: a first power supply assembly 300 and a second power supply assembly 400, wherein the first power supply assembly 300 is connected with the plasma sterilization apparatus 100 to provide a high frequency narrow pulse power supply that satisfies a first preset condition; the second power supply assembly 400 is connected to the pulsed electric field device 200 to provide low bandwidth pulsed power that satisfies a second predetermined condition. The first preset condition and the second preset condition are the voltage peak frequency and the pulse width, and the size can be adjusted by a person skilled in the art under the condition of no use, so the method is not particularly limited herein.
In brief, the first water outlet 103 of the plasma sterilization device is connected with the second water inlet 201 in the pulse electric field device, so that the bacteria-carrying liquid flows in from the first water inlet, the bacteria-carrying liquid after plasma treatment flows out from the first water outlet, then flows into the pulse electric field device from the second water inlet for further sterilization, and the bacteria-carrying liquid after final sterilization is obtained and flows out from the second water outlet.
In summary, the sterilization principle of the sterilization device combining plasma and pulsed electric field is as follows: when the plasma is combined with the pulsed electric field, in the first step, the liquid with bacteria is introduced into the plasma reaction cavity. Under the conditions of porous ceramic medium coated on the surface of the first electrode, an air blowing device at the bottom of the water tank and a high-frequency narrow-pulse power supply, the plasma reaction cavity can generate large-area uniform discharge. The discharge is fully contacted and mixed with the bacteria-carrying liquid. The resulting active can kill most of the less resistant bacteria, such as E.coli, while the more difficult to kill spores are charged. And in the second step, a pulse electric field is applied to the charged spores, and the inner layer and the outer layer of the spores are polarized under the action of the electric field, so that a transmembrane voltage is generated, and when the transmembrane voltage is accumulated to a certain degree, the spores are killed.
According to the plasma and pulse electric field combined sterilization device provided by the embodiment of the invention, bacteria are charged through the discharge of the previous stage plasma, and the subsequent stage pulse electric field enables the bacteria to generate transmembrane voltage to damage cell structures, so that the combined sterilization effect is achieved, the strong-resistance bacteria of spores are killed, the sterilization effect is strong, the treatment speed is high, and the treatment capacity is large.
Next, a method for sterilizing a plasma and a pulsed electric field according to an embodiment of the present invention will be described with reference to the accompanying drawings.
Fig. 4 is a flow chart of a method of sterilizing a plasma in combination with a pulsed electric field in accordance with one embodiment of the present invention.
As shown in fig. 4, the sterilization method by combining plasma and pulsed electric field comprises the following steps:
in step S101, the bacteria-carrying liquid is uniformly discharged to generate an active material for sterilization, and the plasma-treated bacteria-carrying liquid is obtained.
In step S102, under the action of an electric field, a transmembrane voltage is generated on the inner side and the outer side of the spore of the bacteria-carrying liquid after the plasma treatment, so that the spore is killed after the transmembrane voltage is accumulated to a preset threshold value, and the bacteria-carrying liquid after final sterilization is obtained.
It should be noted that the foregoing explanation of the embodiment of the sterilization apparatus using plasma and pulsed electric field is also applicable to the method, and will not be repeated here.
According to the plasma and pulse electric field combined sterilization method provided by the embodiment of the invention, bacteria are charged through the discharge of the previous stage plasma, and the cell structure is destroyed by the transmembrane voltage generated by bacteria through the next stage pulse electric field, so that the combined sterilization effect is achieved, the strong-resistance bacteria of spores are killed, the sterilization effect is strong, the treatment speed is high, and the treatment capacity is large.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. A plasma and pulsed electric field combined sterilization device, comprising:
The plasma sterilization device is used for uniformly discharging the bacteria-carrying liquid to generate active substances for sterilization and obtain the bacteria-carrying liquid after plasma treatment; wherein, the plasma sterilization apparatus includes: the device comprises a first water tank, a first water inlet, a first water outlet, a gas blowing port, a porous gas blowing plate, a storage chamber, a first electrode, porous ceramics, a grounding bus, a high-voltage bus and a vent hole; the first water tank is an organic glass water tank; the first water inlet is an inflow port for bacteria-carrying liquid; the first water outlet is an outflow port of the bacteria-carrying liquid; the air blowing port blows air into the storage chamber, and the air flow rate is 0.01-1L/min; the porous air-blowing plate only passes through air, after ventilation, the plate surface generates uniform fine bubbles, and the air storage chamber uniformly distributes air pressure to the bottom of the whole water tank, so that air is uniformly generated on the whole ground during ventilation; the first electrode is made of metal material, and the distance between the electrodes is 4mm-20mm; the ceramic of the porous ceramic covers the outer surface of the first electrode to form a dielectric barrier discharge structure; all grounding electrodes of the grounding bus are connected to the grounding bus; all high-voltage electrodes of the high-voltage bus are connected to the high-voltage bus, and the high-voltage bus is connected with a high-frequency narrow-pulse power supply;
The pulse electric field device is connected with the plasma sterilization device and is used for generating transmembrane voltage on the inner side and the outer side of spores of the bacteria-carrying liquid after plasma treatment under the action of an electric field so as to kill the spores after the transmembrane voltage is accumulated to a preset threshold value and obtain the bacteria-carrying liquid after final sterilization.
2. The plasma and pulsed electric field combined sterilization apparatus of claim 1, further comprising:
The first power supply assembly is connected with the plasma sterilization device to provide power supply of a high-frequency narrow pulse power supply meeting a first preset condition;
The second power supply assembly is connected with the pulse electric field device to provide low-bandwidth pulse power supply meeting a second preset condition.
3. The plasma and pulsed electric field combined sterilization apparatus of claim 2, wherein the pulsed electric field apparatus comprises: the second water inlet, the second water outlet, the second water tank and the second electrode.
4. A plasma and pulsed electric field combined sterilization apparatus as defined in claim 3 wherein the first water tank and the second water tank are plexiglass water tanks providing a sterilization site for the bacteria-laden liquid.
5. The plasma and pulsed electric field combined sterilization apparatus according to claim 3, wherein the bacteria-carrying liquid flows in from the first water inlet, the bacteria-carrying liquid after plasma treatment flows out from the first water outlet, then flows into the pulsed electric field apparatus from the second water inlet for further sterilization, and the bacteria-carrying liquid after final sterilization is obtained and flows out from the second water outlet.
6. The plasma and pulsed electric field combined sterilization device according to claim 1, wherein the plasma sterilization device adopts a multi-layer flat dielectric barrier discharge structure, and the surface coating is the porous ceramic, so that active substances are generated by large-area uniform discharge.
7. The plasma and pulsed electric field combined sterilization apparatus of claim 6, wherein the porous ceramic covers an outer surface of the first electrode to form a dielectric barrier discharge.
8. A plasma and pulsed electric field combined sterilization apparatus according to claim 3 wherein a piece of said second electrode is disposed on each side of said second water tank for connection to said second power supply assembly for generating pulsed electric field sterilization.
9. A method of sterilizing a plasma in combination with a pulsed electric field, using a sterilizing apparatus according to any one of claims 1 to 8, said method comprising:
Uniformly discharging the bacteria-carrying liquid to generate active substances for sterilization, and obtaining the plasma-treated bacteria-carrying liquid;
under the action of an electric field, generating a transmembrane voltage on the inner side and the outer side of the spores of the bacteria-carrying liquid after the plasma treatment so as to kill the spores after the transmembrane voltage is accumulated to a preset threshold value, and obtaining the final sterilized bacteria-carrying liquid.
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| CN111248393B (en) * | 2020-02-27 | 2023-03-21 | 西安交通大学 | Fluid food synergistic sterilization device and method |
| CN111420109B (en) * | 2020-03-01 | 2022-05-10 | 杭州维那泰克医疗科技有限责任公司 | Electromagnetic pulse synergistic plasma efficient air purification and disinfection equipment |
| CN111248392A (en) * | 2020-03-17 | 2020-06-09 | 青岛农业大学 | Falling film type low-temperature plasma-pulse intense light sterilization reactor for fruit and vegetable juice |
| CN111494697B (en) * | 2020-04-30 | 2021-10-15 | 清华大学 | Electromagnetic disinfection device and disinfection method thereof |
| CN116035062A (en) * | 2023-02-13 | 2023-05-02 | 江南大学 | Method for drying berries |
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| CN206673930U (en) * | 2017-03-28 | 2017-11-24 | 中国工程物理研究院流体物理研究所 | A kind of composite high pressure impulse electric field, electric field sterilization device |
| CN107721034A (en) * | 2017-10-20 | 2018-02-23 | 复旦大学 | A kind of wastewater treatment equipment of low temperature plasma combined catalyst and adsorbent |
| CN209989118U (en) * | 2018-12-19 | 2020-01-24 | 清华大学 | Plasma and pulse electric field combined sterilizing device |
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