WO2002058838A1 - Dispositif d'epuration et de decontamination des eaux usees dans un milieu de decharge luminescente electrique non autonome - Google Patents

Dispositif d'epuration et de decontamination des eaux usees dans un milieu de decharge luminescente electrique non autonome Download PDF

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WO2002058838A1
WO2002058838A1 PCT/US2002/002121 US0202121W WO02058838A1 WO 2002058838 A1 WO2002058838 A1 WO 2002058838A1 US 0202121 W US0202121 W US 0202121W WO 02058838 A1 WO02058838 A1 WO 02058838A1
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Prior art keywords
electrodes
reaction chamber
internal
electtodes
impulse voltage
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PCT/US2002/002121
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English (en)
Inventor
Olexandr B. Zayika
Vasily P. Bakhar
Edward Levin
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Water Works Global, Inc.
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Publication of WO2002058838A1 publication Critical patent/WO2002058838A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/14—Plasma, i.e. ionised gases
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/4608—Treatment of water, waste water, or sewage by electrochemical methods using electrical discharges
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D2203/00—Aspects of processes for making harmful chemical substances harmless, or less harmful, by effecting chemical change in the substances
    • A62D2203/10—Apparatus specially adapted for treating harmful chemical agents; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0803—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J2219/0805—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • B01J2219/0807—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges involving electrodes
    • B01J2219/0809—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges involving electrodes employing two or more electrodes
    • B01J2219/0813—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges involving electrodes employing two or more electrodes employing four electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0803—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J2219/0805—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • B01J2219/0807—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges involving electrodes
    • B01J2219/0824—Details relating to the shape of the electrodes
    • B01J2219/0826—Details relating to the shape of the electrodes essentially linear
    • B01J2219/083—Details relating to the shape of the electrodes essentially linear cylindrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0803—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J2219/0805—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • B01J2219/0845—Details relating to the type of discharge
    • B01J2219/0847—Glow discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0871—Heating or cooling of the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0873—Materials to be treated
    • B01J2219/0881—Two or more materials
    • B01J2219/089—Liquid-solid
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • 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
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4616—Power supply
    • C02F2201/46175—Electrical pulses

Definitions

  • Baekg ⁇ s ⁇ nd of the In ention There are known devices for water treatment based on the use of plasma of an electric discharge the effect of which causes production of ions O “ , O 2 " O 3 " OH " H 2 O “ , peroxide H 2 O 2 and super-oxide H O 3 in an aqueous medium.
  • the said reagents interact with matters contained in sewage, and have a destructive effect on microorganisms.
  • whicli comprises a reaction chamber with two flat electrodes inr stalled horizontally in a case thereof so as to face each other, and connected to a source of high voltage.
  • the device is provided with a means for feeding treated water into the reaction chamber.
  • the electric discharge plasma is produced between two said electrodes when a high voltage of at least 3000 V is supplied.
  • the closest prior art of the invention is a device intended for accomplishment of a method of sewage treatment by an electrical glow discharge produced above a thin sheet of fluid at a eon- stant voltage of 0.5-2 kV and an operating current strength of 50-100 mA under vacuum conditions and while a specific temperature is maintained (RU, 2043969).
  • the said device (RU, 2043969) comprises a reaction chamber with at least two annular electrodes, arranged in the case thereof coaxially (in alignment), one of which is an internal electrode in relation to the other, external. There is a clearance provided between the said electrodes for flow of a treated fluid, and for an electrical glow discharge, produced between the said electrodes, one of which covered with the treated fluid in the course of the device operation.
  • the device also comprises a means for applying an electric potential to the said electrodes, which incorporates a source of an operating constant voltage, electrically connected with the said electrodes, a cooling jacket, placed on the outer side of the said reaction chamber, a means for feeding the treated fluid into the said reaction chamber, and a means of vacuum development inside the said reaction chamber.
  • Another object of the invention is to provide, with the aid of additional ionization (excitation) discharge, applied to the same pairs of the unlike electrodes conditions for ionization and support of the operation discharge.
  • One more object of the invention is to provide conditions for control and regulation of the value of strength of impulse operating current, it's clock frequency and duty cycle in the medium of operating glow discharge, as well as to regulate value of strength of the impulse current, clock frequency and impulse duration in the medium of additional ionization discharge.
  • a known device for treatment and decontamination of sewage in a medium of an electrical glow discharge comprising a reaction chamber, at least two annular electrodes (internal and external) arranged coaxially with a clearance for initiation of the said glow discharge, a means for applying an electric potential to the said electrodes, which incorporates a source of an operating voltage, electrically connected with the said electrodes, a cooling jacket placed on the outer side of the said reaction chamber, a means for feeding the said water into the said reaction chamber, and a means of vacuum development inside the said reaction chamber, according to the invention, is provided with a cooling system of internal electrodes, whereas an external electrode presents a case of the said chamber, and the means for applying an electric potential to the said electrodes comprises sources of an operating impulse voltage and ionization (excitant) impulse voltage having a split-type connection with each of the said electrodes with the provision made for simultaneous supply thereto of the operating impulse voltage and ionization impulse voltage.
  • the internal electrodes cooling system is made as a tube, passing through the said electrodes, or as two, arranged in alignment tubes, passing through the said electrodes.
  • the number of the internal electrodes is determined by the degree of contamination and volume of water, subject to treatment and / or decontamination per unit of time.
  • the provision is further made for magnets, installed on the outside of the said reaction chamber opposite the internal electrodes, with the provision for the removal thereof.
  • the magnets therewithrare made of an annular, shape.
  • the said reaction chamber is made of a cylindrical shape, for example, with the inside diameter of 25-250 mm and the height of 150-1500 mm, and is installed upright.
  • the said means for water delivery into the said reaction chamber is made with a provision f ⁇ r feeding the said medium onto the internal surface of the external electrode in a turbulent flow, for example, as injectors having a tangential arrangement along a circle at an angle, preferably of 5-30° relative to the horizontal plane of the reactor.
  • the said sources of an operating impulse voltage and ionization impulse voltage have a split-type connection with each of the said electrodes, with the provision made for simultaneous supply thereto of the operating impulse voltage and ionization impulse voltage.
  • the internal electrodes are made of a metal, having a thermal conductivity factor of at least 100 W/(mK).
  • the outside surface of the internal electrodes is covered with a refractory metal, for example, tungsten or nickel-chromium alloy.
  • the magnets are- made so, that to provide a magnetic field with a value of magnetic induction of at least 0.01 T (Tesla).
  • FIG. 1 is a block diagram of the device for sewage treatment and decontamination
  • Fig, 2 is a longitudinal sectional view of a reaction chamber, where proper treatment and/or decontamination of water occur;
  • Fig. 3 is a cross-sectional view of the said reaction chamber, taken along line A-A.
  • a device for sewage treatment and decontamination (Fig.- 1) comprises a reactor 1, where a non-self-maintained glow discharge is produced and proper treatment and decontamination of sewage occur, a reservoir 2 for accumulation of sewage, before it is fed to the reactor 1, means providing for vacuum development in the reactor 1 and comprising a water-jet ejector 3 and a pump 4 that keeps the ejector 3 operating, a unit 5 for monitoring selected vacuum parameters in the reactor 1, a unit 6 for feeding fluid from the reservoir 2 into the reactor 1, units 7 and 8 for cooling the reactor 1, a reservoir 9 for collection of a purified fluid connected with the reactor 1, a pump 10 for pumping out the purified fluid from the reservoir 9, a filter 11 connected with the pump L0, an electrical-power supply source 1 for energizing the reactor I and a means.13 providing control over and monitoring of operation of the entire device.
  • the means 13 can be made, for example, as a processor.
  • a device as claimed in the invention can be made with one reactor 1 or more.
  • the reservoir 2 is equipped with, a float valve 14, providing required level of the treated fluid.
  • the unit 5 for monitoring the selected vacuu parameters in the reactor 1 comprises a pressure transmitter 15 connected with the reactor 1, and a controller 16 of the pressure transmitter 15, and a solenoid-operated valve 17.
  • the unit 6 for feeding fluid from the reservoir 2 into the reactor 1 comprises a coarse filter 19, a solenoid-operated valve 20 and a pipeline 21 connecting the reservoir 2 with the reactor 1.
  • the unit 7 for cooling the reactor 1 is essentially a jacket, placed around the reactor 1 con- nected with the means (not specified on the drawing) for pumping a liquid coolant through the jacket.
  • the unit 8 for cooling the reactor 1 comprises heat exchanger 22, an oil pump 23 and means for cooling oil in the heat exchanger 22.
  • the means f ⁇ r cooling oil in the cooler 22 can be provided by cooled- ater.
  • the pump 4 is connected to the ejector 3 by a pipeline 24.
  • the pumps 4 and 10, the power supply source 12, the controller 16 of the pressure transmitter 15, and the solenoid-operated valve 17, the solenoid-operated valve 20, the oil pump 23 are connected with the control-means 13 (the connection is not specified on the drawing).
  • the reactor 1 (Fig. 2) is made as a chamber and comprises a case 25 being an electrode that is covered, during the operation, with the treated fluid.
  • the reactor 1 is equipped with the means for delivering and forming a stream of the treated fluid made, for example, as injectors 28.
  • Magaets 29 are installed on the outer side of the case 25 opposite the electrodes 26 with the provision for the removal thereof.
  • the electrodes 26 are made of annular, shape with-through-boles 30 connected wit the cooling system 27, made as two coaxial pipes, connected with the unit 8 (Fig. 1) for cooling the reactor 1 by the feed and lateral pipelines (not specified on the drawing).
  • the magnets 29 are both the permanent magnets, and electromagnets, made of annular shape and installed with the provision for the removal thereof.
  • the case 25 being an electrode and the electrodes 26 are electrically connected to the power supply source 12.
  • the electric power supply source 12 comprises sources of the operating impulse voltage and ionization impulse voltage, each being individually connected to the electrodes 25 and 26.
  • the case 25, being an electrode, of the reactor 1 is made in a form of a hollow cylinder
  • the electrode 26 can comprise one or more electrode members. To treat and decontaminate large volumes of fluids, containing a heavy waste load, it is necessary to have a large surface area of the active electrode. Therefore, the electrode 26 can be a cluster electrode. The number of the members thereof is determined by the time required for the treated fluid to stay in the reaction zone in order the selected efficiency of the process can be achieved.
  • the electrode 26 consists of 6 members.
  • a separate conductor 31 connects every electrode 26 to the electric power supply source 12.
  • the electrodes 26 are installed, so that they have a clearance relative to the electrode 25, in a particular embodiment of 8mm.
  • the electrodes 26 are made of a metal, aluminum, having a thermal conductivity of at least
  • the outside surface of the electrodes 26 is covered with a refractory metal * for example, tungsten.
  • the magnets 29 are made so that to provide a magnetic field with a value of magnetic induction of at least 0.02 T.
  • the device according to the- invention functions in the following manner:
  • a reduced atmospheric pressure from 30 up to 250-Torr (from 4 * 10 3 to 3.3 * 10 4 Pa), i.e. vacuum, is developed in the case 25 of the reactor 1 with the-aid of the water-jet ejector 3 through the pipeline 18.
  • an operating fluid which develops depression
  • sewage subject to treatment which is fed to the ejector 3 with the aid of the pump 4.
  • the water is oxygenated from air, since the ejector provides for vigorous mixing of the water and air.
  • the selected vacuum parameters are monitored with the aid of the pressure transmitter 15, the controller 16 of the pressure transmitter 15, and the solenoid-operated valve 17. In so doing, the controller 16 of the pressure transmitter 15 digitizes data received from the pressure transmitter 15 and feeds this information to the processor 13.
  • the liquid coolant is pumped through the unit 7, i.e. the cooling jacket of the reactor 1, and the cooling transformer oil is pumped through the unit 8 connected with the cooling system 27, thus ensuring maintenance of the required temperature of the electrodes 25 and 26, and the treated water below the natural boiling point.
  • the solenoid-operated valve 20 opens in response to a control signal of the processor 13, and sewage is fed for treatment in a turbulent flow 0.3-5 mm m depth from the inlet reservoir 2 through the pipeline 21 and the injectors 28 into the reactor 1.
  • the filter 19 therewith allows to prevent suspension particles in the treated fluid from getting on the injectors 28.
  • the operating impulse voltage of no more than 500 N with the clock frequency of 0.1-100 kHz, and duty cycle no less than 1.3 and the ionization impulse voltage featuring the value of 2-10 kN, the current strength of 30-5000 ⁇ A and the pulse duration of 0.01 -20 ⁇ s, are simultaneously applied to the electtodes 25 and 26, thus producing a non-self-maintained glow discharge with an adjustable operating current of 0.1-20 A on each pair of the unlike electrodes, the operating voltage of no more than 500 V, the clock frequency of 0.1-100 kHz and the duty cycle of at least 1.3.
  • Such conditions of producing the glow discharge allow to implement the process at an average in time value of impulse current strength of up to 20 A and a voltage of no more than 500 N with the provision for adjustment of the clock frequency and duty cycle of the current impulse.
  • the fluid is treated by the non-self-maintained glow discharge in presence or in absence of a magnetic field.
  • the fluid treated by the non-self-maintained glow discharge drains into the reservoir 9, from where it is delivered to the filter 11 by the pump 10 for extraction of insoluble sludge mat coagulates, during the fluid treatment.
  • the device according to the invention was used for sewage treatment and decontamination according to the following embodiments:
  • the efficiency of treatment of this water was examined in relation to the depth of the treated fluid sheet, and the average in time value of the impulse operating current of a non-self-maintained glow discharge.
  • the sewage sample was treated by plasma of a non-self-maintained glow discharge, produced with the aid of the above-described device.
  • the sewage sample was treated by the non-self-maintained glow discharge, having the average in time value of strength of impulse operating current of 2 A, 3 A, 5 A on two pairs of the unlike electrodes, the voltage of 450N, the clock frequency of 4Q0Hz, the relative pulse duration of 2.
  • the operating impulse voltage of 450V with the clock frequency of 400Hz was applied to the electrodes 25 and 26, and the non-self-maintained glow discharge plasma was produced with the aid of ionization impulse voltage of 8kV of 2mA with the pulse duration of 10 ⁇ s and clock frequency of 20 kHz , which was applied to the same electrodes 25 and 26
  • the distance from the surface of liquid to the electrode 26 ia gaseous media was 8mm.
  • the treated fluid was passed through the non-self-maintained glow discharge plasma in a stream 0.55mm, 0.65mm and 0.75mm in depth.
  • the non-self-maintained glow discharge plasma was further affected by a magnetic field, with the value of magnetic induction being 0.02 T.
  • the most effective, as regards the degree of treatment and power consumption, is the treatment of fluid passed in a stream 0.55mm in depth through plasma of a non-self-maintained glow dis- charge, having the average in time value of sttength of the summarized impulse operating current of 2A, the voltage of 450V, the frequency of 400Hz and the relative pulse duration of 2.
  • the power consumption during such treatment of sewage from ions of heavy metals is only 1.38 kW.h per 1 m 3
  • the known method-of water purification with the aid of a_glow discharge (RU, 2043969, Table) requires 1.6-1.9 kW.h for treatment of 1 m 3 .
  • the sewage sample was tteated by the non-self-maintained glow discharge, having the average in time value of strength of the summarized impulse operating current of 1A, 3 A, 6 A and 10 A on four pairs of the unlike electtodes, with the relative pulse duration of 2.0, 3.0 and 4.0, the voltage of 490V, the clock frequency of 1000Hz and the relative pulse duration of 2.
  • the operating impulse voltage of 490V with the clock frequency of 1000Hz was applied to the electtodes 25 and 26, and the non-self-maintained glo discharge plasma was produced with the aid of ionization impulse voltage of 4- ⁇ kV current sttength of 2mA, clock frequency 40 kHz, with the pulse duration of lO ⁇ s, which was applied to the same electrodes 25 and 26.
  • the tteated fluid was passed through, the non-self-maintained glow discharge plasma in a stream
  • the distance from the fluid surface-to- the electtodes in gaseous atmosphere was 8 mm.
  • the non-self-maintained glow discharge plasma was further affected by a magnetic field with the value of magietie induction being 0.02 T.
  • the optimal duty cycle of the operating current for sewage treatment from ions of silver is determined within the range from 2.0 to 3.0.
  • Embodiment s Subject to treatment was a conducting solution containing 500 mg/1 of a surfactant DC-l ⁇ (oxyethylated spirit).
  • the aqueous solution was tteated by plasma of a non-self-mamtained glow discharge, produced with the aid of the above-described device.
  • the sewage sample was treated by the non-self-maintained glow discharge having the average in time value of strength of the summarized impulse operating current of 0.6 A, 2 A, 4 A on two pairs of the unlike electrodes; voltage 470V,ck»ck frequency 100Hz and 400Hz and the relative pulse duration of 2.
  • the operating impulse voltage ⁇ ef-47GV with the clock frequency of 100 and 400 Hz. was applied to the electrodes 25 and 26, and the non-self-maintained glow discharge plasma was produced with the aid of ionization impulse- voltage of 10 kV, with average value of strength of impulse current of 4mA with the pulse duration of 5 ⁇ s, which was applied to the same electrodes 25 and 26.
  • the distance from the surface of liquids to the electrode 26 in the gaseous medium was 8mm.
  • the tteated fluid was passed through-the non-self-maintained glow discharge plasma in a stream 0.65mm in depth.
  • the tteated fluid was further affected by a magnetic field with the value of magnetic induction being 0.02 T.
  • Subject to treatment was water* containing various microorganisms in a concentration of 10 12 ttrat/1.
  • the aqueous solution was tteated by plasma of a non-self-maintained glow discharge y produced with the aid of the above-described device.
  • the sewage sample was tteated hy the non-self-maintained glow discharge, having the average in time value of strength of the summarized impulse operating current of 5 A and 10A, on two pair of the unlike electrodes, the voltage- of 475 V, the clock frequency of 2 kHz and the relative pulse duration of 2.
  • the operatmg impulse voltage of 475 V with the clock frequency of 2kHz was applied to the electtodes 25 and 26, and the non-self-maintained glow discharge plasma was produced with the aid of ionization impulse voltage of lOkV, with impulse current sttength of 200 ⁇ A, clock frequency 40kHz with the pulse duration of 5 ⁇ s, which was applied to the same electtodes 25 and 26.
  • the distance between surface of liquid and electrode 26 in the gaseous media was 8mm.
  • the tteated fluid was passed through the non-self-maintained glow discharge plasma in a stream 0.5 and 1.0 mm in depth. Simultaneously, the non-self-maintained glow discharge plasma was further affected by a magnetic field with the value of magnetic induction being 0.02 T.
  • Table 4 The treatment results are presented in Table 4, Table 4
  • E.Coli the maximum time of inactivation of E.Coli is l 2s, for yeast-like fungi of the Candida genus and for pathogenic staphylococcus it is 1.2 s, whereas during a fluid treatment by a glow discharge (see RU, 2043975, Table) the minimum time of inactivation of E.Coli is 7 s, and for yeast-lifce fungi of the Candida genus and for pathogenic staphylococcus it is 6 s.
  • the device according to the invention allows to carry out treatment and decontamination of water in a medium of a non-self-maintained glow discharge, and to provide for adjustment of the value, clock frequency and relative pulse duration of the impulse operating current, thereby allowing to select the most optimal conditions of water tteatment and or decontamination.
  • the above embodiments of the device, according to the invention confirm that it cart be effectively used for treatment and decontamination of industrial and domestic sewage containing critical concentrations of toxiferous components to a level of the hygiene and sanitary standards and lower, for supplementary purification of sewage, after prior treatment by known methods.
  • the device according to the invention allows to carry out the treatment process at a high (20A) average in time value of sttength of current and a relatively low voltage of 500V and below.
  • the proposed invention makes it possible to increase the efficiency of sewage treatment and decontamination, and thus to reduce the power costs of tteatment per volume unit of tteated fluids.

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  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Toxicology (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention porte sur un dispositif d'épuration et de décontamination des eaux usées dans un milieu de décharge luminescente électrique comportant une chambre à réaction, au moins deux électrodes annulaires (interne et externe) disposées de manière coaxiale et avec du jeu afin de lancer ladite décharge luminescente, un organe permettant d'appliquer un potentiel électrique auxdites électrodes, qui présente une source de tension de fonctionnement, connectée électriquement auxdites électrodes, une chemise de refroidissement placée sur le côté externe de ladite chambre de réaction, un organe d'alimentation d'eau en direction de ladite chambre ainsi qu'un organe de développement sous vide à l'intérieur de ladite chambre doté d'un système de refroidissement des électrodes internes. Quant à l'électrode externe, elle présente une boîte de ladite chambre et l'organe permettant d'appliquer un potentiel électrique auxdites électrodes comporte des sources d'une tension de choc de fonctionnement et d'une tension de choc d'amorçage (d'excitation) ayant une connexion sectionnée avec chacune des électrodes en vue d'assurer l'alimentation simultanée de la tension de choc de fonctionnement et de la tension de choc d'amorçage.
PCT/US2002/002121 2001-01-25 2002-01-25 Dispositif d'epuration et de decontamination des eaux usees dans un milieu de decharge luminescente electrique non autonome WO2002058838A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26414101P 2001-01-25 2001-01-25
US60/264,141 2001-01-25

Publications (1)

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WO2002058838A1 true WO2002058838A1 (fr) 2002-08-01

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008127135A1 (fr) 2007-04-11 2008-10-23 Olexandr Borisovich Zayika Procédé de traitement de l'eau et de solutions aqueuses par plasma de décharge gazeuse et dispositif de mise en oeuvre de ce procédé
ES2343299A1 (es) * 2009-01-26 2010-07-27 Consejo Superior De Investigaciones Cientificas (Csic) (67%) Metodo de eliminacion de trihalometanos y/o contaminantes emergentes mediante plasma.
JP2014534045A (ja) * 2012-03-27 2014-12-18 オブシェストヴォ エス オグラニチェンノィ オトゥヴェトゥストゥヴェンノスティユ “プラズマ−プロ” 有機汚染物質及び化学的微生物性汚染物質を水から除去するための装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5234555A (en) * 1991-02-05 1993-08-10 Ibbott Jack Kenneth Method and apparatus for ionizing fluids utilizing a capacitive effect
US5368724A (en) * 1993-01-29 1994-11-29 Pulsed Power Technologies, Inc. Apparatus for treating a confined liquid by means of a pulse electrical discharge
US5876663A (en) * 1995-11-14 1999-03-02 The University Of Tennessee Research Corporation Sterilization of liquids using plasma glow discharge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5234555A (en) * 1991-02-05 1993-08-10 Ibbott Jack Kenneth Method and apparatus for ionizing fluids utilizing a capacitive effect
US5368724A (en) * 1993-01-29 1994-11-29 Pulsed Power Technologies, Inc. Apparatus for treating a confined liquid by means of a pulse electrical discharge
US5876663A (en) * 1995-11-14 1999-03-02 The University Of Tennessee Research Corporation Sterilization of liquids using plasma glow discharge

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008127135A1 (fr) 2007-04-11 2008-10-23 Olexandr Borisovich Zayika Procédé de traitement de l'eau et de solutions aqueuses par plasma de décharge gazeuse et dispositif de mise en oeuvre de ce procédé
JP2010523327A (ja) * 2007-04-11 2010-07-15 ボリソビッチ ザイカ，アレキサンドル ガス放電プラズマによる水及び水溶液の処理方法及びその遂行のための装置
ES2343299A1 (es) * 2009-01-26 2010-07-27 Consejo Superior De Investigaciones Cientificas (Csic) (67%) Metodo de eliminacion de trihalometanos y/o contaminantes emergentes mediante plasma.
WO2010084233A1 (fr) * 2009-01-26 2010-07-29 Consejo Superior De Investigaciones Científicas Procédé d'élimination de trihalométhanes et/ou de contaminants émergents à l'aide de plasma
JP2014534045A (ja) * 2012-03-27 2014-12-18 オブシェストヴォ エス オグラニチェンノィ オトゥヴェトゥストゥヴェンノスティユ “プラズマ−プロ” 有機汚染物質及び化学的微生物性汚染物質を水から除去するための装置

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