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WO1999050185A1 - Procede et appareils de sterilisation de liquides - Google Patents

Procede et appareils de sterilisation de liquides Download PDF

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Publication number
WO1999050185A1
WO1999050185A1 PCT/AU1999/000227 AU9900227W WO9950185A1 WO 1999050185 A1 WO1999050185 A1 WO 1999050185A1 AU 9900227 W AU9900227 W AU 9900227W WO 9950185 A1 WO9950185 A1 WO 9950185A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrodes
pulses
voltage
average current
polarity
Prior art date
Application number
PCT/AU1999/000227
Other languages
English (en)
Inventor
Donald Edward Tame
Paul Maitland Storer
Original Assignee
Greathall Overseas Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Greathall Overseas Ltd. filed Critical Greathall Overseas Ltd.
Priority to AU31284/99A priority Critical patent/AU3128499A/en
Publication of WO1999050185A1 publication Critical patent/WO1999050185A1/fr

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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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
    • 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
    • A61L2/03—Electric current
    • A61L2/035—Electrolysis
    • 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
    • C02F1/4606—Treatment of water, waste water, or sewage by electrochemical methods for producing oligodynamic substances to disinfect the water
    • 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
    • C02F1/48—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
    • C02F1/46—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
    • 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
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • 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
    • C02F2001/46133—Electrodes characterised by the material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C02F2103/023—Water in cooling circuits
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/42—Nature of the water, waste water, sewage or sludge to be treated from bathing facilities, e.g. swimming pools
    • 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
    • C02F2201/4612—Controlling or monitoring
    • C02F2201/46125—Electrical variables
    • 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
    • C02F2201/4612—Controlling or monitoring
    • C02F2201/46125—Electrical variables
    • C02F2201/4613—Inversing polarity
    • 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
    • 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
    • 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

Definitions

  • THIS INVENTION relates to sterilisation of, or reduction of contaminants in, aqueous systems.
  • the invention is directed to a method and apparatus for killing or increasing morbidity, or reducing viability or growth rate, of microorganisms in aqueous media.
  • aqueous media is intended to include not only water-based liquids but also sludges, gels, colloidal suspensions and other compositions having a substantial water component.
  • microorganisms includes bacteria, viruses, algae, fungi and parasites found in biological systems.
  • This invention has particular but not exclusive application to sterilising or disinfecting sewage and general waste waters, bore water and waste water contaminated by microorganisms, contaminated water in airconditioning cooling towers, reservoirs, foundry water, medical liquid waste, parasite contaminated waters; algae elimination in water storage areas, ponds, aquaculture; sterilising water for drinking, incorporation in foods or beverages or for cleaning; treatment of swimming pool and spa water; reclaiming water for recycling; and for illustrative purposes, reference will be made to such applications.
  • this invention could be used in other applications, such as for disinfecting or depopulating waters containing higher living organisms, such as guardia, Cryptosporidium, Staphylococcus aureus, Legionnaire's bacteria, Cholera, Typhoid viruses, flocculation of suspended solids in a viscous matter and cleaning of oil-rig tanks and other tanks by electro-oxidation.
  • BACKGROUND ART Methods of treating waste water prior to discharge into the environment, or drinking water for consumption, usually include chlorination. Chlorination may be effected by adding a hypochlorite solution, electrolysis of a chloride salt solution, or by dissolving chlorine gas directly into the water. Ammonia may be used in conjunction with chlorine to produce chloramine which has a longer residual than chlorine, but requires a higher concentration to have the same effective kill rate.
  • sanitisation agents can also be used, such as formaldehyde and the like but these are expensive, difficult to handle, or may break down to produce nutrients for bacterial growth.
  • chlorination is commonly used, it suffers from problems of incomplete disinfection and production of organochlorides, and a declining residual. Where chlorine gas is used, there is a safety risk in handling the poisonous chlorine gas. Chlorination also affects the taste and smell of water detrimentally, and an appropriate dosing rate is often difficult to achieve.
  • Electrodes are inserted in the water, and connected to a source of alternating current in the form of a sine wave or saw tooth wave.
  • alternating current AC
  • DC direct current
  • this invention provides apparatus for sterilising or otherwise treating aqueous media, the apparatus having at least a pair of spaced electrodes adapted to be placed in an aqueous medium in use, and means for applying a pulsed voltage between the electrodes .
  • the invention provides a method of sterilising or otherwise treating aqueous media, the method including the steps of placing at least a pair of spaced electrodes in electrical contact with an aqueous medium, and applying a pulsed voltage between the electrodes .
  • the voltage is in the form of a rectangular waveform having spaced DC pulses, the waveform being offset from zero so that it has a DC component.
  • the amplitude of the voltage pulses is typically between 0.5 volts and 100 volts, depending on the application.
  • the pulses may be of variable width in order to maintain a desired average current between the electrodes for any particular application.
  • the width of each pulse may suitably be varied between 1% and 99% of the total period between pulses, but preferably the pulse width is around 5% of the period.
  • the variation of the pulse width is referred to in this specification as pulse width modulation. Either leading edge modulation or trailing edge modulation or a combination of both, may be used.
  • the pulse frequency may be varied to suit the particular liquid being treated or the particular purpose of the treatment. Typically, the frequency of the pulses is between 100 per second and 20000 per second, but preferably around 1000 per second.
  • the polarity of the voltage applied between the electrodes is reversed periodically. Typically, the polarity is reversed at intervals ranging between 1 millisecond and 15 minutes.
  • the electrodes may suitably comprise graphite rods encased in stainless steel mesh.
  • FIG. 1 is a schematic drawing of a waste water treatment installation
  • Fig. 2 is an elevation of the electrodes used in the installation of Fig. 1,
  • Fig. 3 is a block diagram of the electrical circuit of the installation of Fig. 1,
  • Fig. 4 is a circuit diagram of part of the electrical circuit of Fig. 3, and
  • Fig. 5 illustrates the waveform of the voltage between the electrodes over time.
  • FIG. 1 depicts apparatus 10 for treating aqueous media, which in this example is waste water.
  • the apparatus includes a feed stock vessel 15, a treated effluent vessel
  • a conduit 18 extending therebetween, and a pump 17 for pumping feed stock 22 from vessel 15 through the conduit 18.
  • An electrode assembly 11 is provided in the conduit 18.
  • a recycle conduit 19 extends from the supply conduit 18 downstream from the electrode assembly 11 to the feed stock vessel 15.
  • Electrode controller 12 is electrically connected to a pair of electrodes in the electrode assembly 11 by respective conductors 13, 14.
  • An ammeter 26 may suitably be provided on the controller 12 for indicating the average current flowing between the pair of energised electrodes.
  • a supply valve 23 is provided in the supply conduit 18 downstream of its junction with the recycling conduit 19.
  • a recycle valve 24 is provided in the recycling conduit.
  • a conductivity sensor 25 may be provided in the supply conduit 28 downstream from the supply valve 23, for sensing the conductivity of the liquid passing therethrough.
  • the supply valve 23 is closed and the recycle valve 24 is opened, and the pump is activated to recycle feed stock from vessel 15 through conduits 18, 19.
  • the recycle valve 24 is closed and the supply valve 23 is opened to feed the treated water into vessel 16.
  • the conductivity sensor 25 which monitors the conductivity of the treated water.
  • the electrode assembly 11 is shown in more detail in Fig. 2.
  • the electrode assembly includes substantially identical electrodes 27, 28, each comprising a stainless steel threaded rod 31 screwed into a threaded socket 32 of a graphite electrode 30, and secured in place with a locking nut 33.
  • the lower ends of the graphite electrodes 31 are maintained at the desired, but adjustable, spacing by an insulating spacer 26 extending between threaded stainless steel studs 31A screwed into the respective graphite electrodes 30.
  • the threaded rods 31 are each encased in a respective PVC plastic tube 34 extending between the associated locking nut 33 and a spacer nut 35 located under the top plate 29 of the electrode assembly 11.
  • the threaded rods 31 extend through respective spaced apertures in top plate 29.
  • the passage of the threaded rods 31 through the top plate 29 is sealed by 0-ring seals 40 sandwiched between bearing nut 36 and spacer nut 35.
  • the threaded rods 31 are connected to the electrode controller by respective conductors 13, 14 which are connected to the threaded rods 31 and secured in place by fixing nuts 38, as can be seen in Fig. 2.
  • the graphite electrodes 30 may each be suitably encased in stainless steel mesh 41 to prolong the life of the electrodes.
  • a voltage is applied across the electrodes by the electrode controller 12.
  • the electrode controller 12 comprises an electronic control circuit, typically a microprocessor controller 41, connected to an input module 42 having a keypad and switch or dial settings which enable the user to set, for example, the desired current level between the electrodes, voltage amplitude, pulse frequency and other operating parameters.
  • a display 43 connected to the microprocessor controller 41 displays selected and actual operating parameters.
  • the display 43 may include the ammeter 26.
  • the microprocessor controller 41 generates a rectangular waveform comprising a series of periodic DC voltage pulses, and feeds this pulsed waveform to a switching circuit 45.
  • the switching circuit amplifies the pulsed waveform and applies it to the conductors 13, 14 connected to respective electrodes 27, 28 in the electrode assembly 11.
  • a current sensor 46 associated with the switching circuit 45 measures the average current passing between the electrodes, and feeds this value back to the microprocessor controller 41.
  • the microprocessor controller 41 varies the duration or width of the voltage pulses in the rectangular waveform so that the resultant average current matches the current as set at the input module 42.
  • the microprocessor controller, switching circuit and current sensor are shown in more detail in Fig. 4.
  • the controller 41 is typically a microprocessor having a pulsed output 44 in the shape of a rectangular waveform of 5 volt pulses with sharp transitions.
  • the pulses may occur from 100 per second to 20000 per second depending upon the particular application, but typically around 1000 per second.
  • the microprocessor also provides two polarity control outputs, namely a forward control output 47 and a reverse control output 48.
  • the two polarity control outputs are of opposite senses, i.e. when one is high, the other is low.
  • the forward control output 47 controls two switchable gates 50, 52, while the reverse control output 48 controls another pair of switchable gates 51, 53.
  • the outputs of gates 50, 51 are connected to p-channel MOSFETs 54, 55 respectively, while the outputs of gates 52, 53 are connected to the inputs of n-channel MOSFETs 56, 57 respectively.
  • the MOSFETs are connected in a bridge circuit to which the electrode conductors 13, 14 are connected.
  • the bridge circuit is connected between a rail voltage V cc and a resistor Rl connected to ground.
  • MOSFET 54 is switched on, thereby raising electrode conductor 13 to approximately the rail voltage V cc while MOSFET 55 is switched off.
  • gate 52 is closed and gate 53 is open.
  • MOSFET 56 is switched on and off by the rectangular waveform at output 44 so that the voltage at the electrodes switches between approximately 0 volts and approximately V cc .
  • the current passing between the electrodes passes through resistor Rl .
  • the forward and reverse control outputs 47, 47 are reversed in order to reverse the polarity of the voltage/current at the electrodes.
  • gates 51 and 53 are open, while gates 50, 52 are closed.
  • MOSFET 55 is switched on, and MOSFET 57 is switched on and off by the pulsed output 44 from the microprocessor 41.
  • a pulsed voltage now appears between the electrodes as described above, but in the opposite sense, i.e. between approximately 0 volts and approximately —V cc . Current now flows through the electrodes in the opposite direction, i.e.
  • FIG. 5 An illustrative waveform of the voltage at the electrode terminals is shown in Fig. 5.
  • the voltage is pulsed periodically at periods T, the pulses being of a duration t.
  • T p/ the polarity of the pulsed voltage at the terminals is reversed. Such reversal of polarity minimises erosion and deposition of the electrodes .
  • the voltage/current waveform at the electrodes when resolved into its DC and AC components by, say, a Fourier transform, comprises both a DC component and an AC component.
  • the DC component (disregarding the polarity reversal) can be expressed as Vt/T. This DC component is shown in broken line in Fig. 5.
  • the current passing through resistor Rl is sensed and averaged (e.g. by rectification or integration) to provide an indication of the average current passing through the electrodes.
  • the voltage across resistor Rl (which is proportional to that current) is amplified, converted from analogue to digital, and fed back to the microprocessor 41 as a control input representing average current.
  • the microprocessor 41 varies the width or duration "t" of the pulses so that the measured average current matches the current set by the user via input module 42.
  • the controller automatically varies or modulates the width of the pulses of the pulsed voltage/current at the electrodes to maintain the average current at a desired level despite changes in the properties of the liquid being treated.
  • the ratio t/T known as the duty cycle may be varied between 1% and 99%, but typically is maintained around 5% in steady state conditions .
  • the display 43 can be used to display various information including output current, whether the control outputs are active or not, and if an overcurrent or undercurrent situation exists.
  • Various parameters can be programmed into the microprocessor controller 41 via the input module 42, including the frequency of the pulsed waveform, the period of the polarity change signal, under current and over current trip limits, and the desired average output current .
  • a serial EEPROM is provided in the input module 42 so that these parameters can be held in non-volatile storage and used later if there is loss of power to the apparatus .
  • the DC component causes the molecules of the contaminant organisms to become polarised, i.e. to act as miniature dipoles .
  • the sudden changes in voltage at the electrodes at the leading and trailing edges of the pulses causes rapid electromechanical agitation of the molecules of the microorganisms at a cellular level.
  • the molecular "dipoles" are rapidly oscillated by the AC component, i.e. the pulsing voltage, to cause heating and cell rupture.
  • Higher harmonic frequencies arising from the pulsed electromagnetic field contribute to the destabilisation of the cell structure, possibly as a result of resonant interaction.
  • the operation of this invention is different from other electrochemical systems in that it does not rely for its effective operation on electrolysis or electrochemical action at the electrodes or any changes in surface tension or other properties of non-cellular water. Rather, it appears that the process of this invention involves direct electromechanical agitation of the microorganisms .
  • metal ions may come from the electrodes themselves or may be contained in the industrial wastes being treated. These metal ions coagulate and are neutralised. Once precipitated, they can be easily removed, e.g. by filtering.
  • the production of inorganic ions using the process of this invention can result in a residual effect that provides sustained morbidity of microorganisms. That is, even after the voltage is removed from the electrodes, the sterilising effect is maintained. This is believed to be due to the formation of complex ion groups in the water which have a continuing toxic effect on microorganisms .
  • the use of different electrode materials, or mixtures of electrode materials, such as copper/silver, brass, titanium/ceramic and graphite, can give rise to different overpotentials, as well as a range of redox potentials. These can result in the production of highly reactive nascent gases such as hydrogen, oxygen (and, if present) chlorine) , hydroxide ions and inorganic ions which contribute to the sustained and/or increased morbidity of microorganisms.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

On élimine ou on neutralise des contaminants dans un milieu aqueux en appliquant une tension pulsée à des électrodes (11) en contact avec le milieu aqueux. La tension appliquée possède une forme d'onde rectangulaire constituée d'impulsions en courant continu. La largeur des impulsions est automatiquement modifiée de façon à obtenir un courant moyen voulu entre les électrodes. On inverse, à des intervalles réguliers, la polarité de impulsions en courant continu, de façon à minimiser l'érosion et le dépôt des électrodes. On peut considérer que la tension pulsée est constituée d'un composant en courant continu et de composants en courant alternatif. On suppose que les molécules des contaminants sont chargées par le composant en courant continu, de façon à former efficacement des dipôles, lesquels sont agités par les brusques transitions de la tension appliquée, ce qui provoque une rupture des cellules dans les micro-organismes contaminants.
PCT/AU1999/000227 1998-03-30 1999-03-30 Procede et appareils de sterilisation de liquides WO1999050185A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU31284/99A AU3128499A (en) 1998-03-30 1999-03-30 Method and apparatus for sterilising liquids

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPP2638 1998-03-30
AUPP2638A AUPP263898A0 (en) 1998-03-30 1998-03-30 Waste water sterilisation by electro-oxidation treatment apparatus and method

Publications (1)

Publication Number Publication Date
WO1999050185A1 true WO1999050185A1 (fr) 1999-10-07

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001089997A3 (fr) * 2000-05-11 2002-05-02 Megaton Systems As Moyen de traitement de l'eau
WO2003082750A1 (fr) * 2002-04-03 2003-10-09 Advanced Oxidation Limited Appareil et procede de traitement d'un effluent
DE102004005303A1 (de) * 2004-01-29 2005-08-11 Gao, Yuan, Dipl.-Ing. Verfahren und Vorrichtung mit speziellen Sensoren und speziell ausgebildeter Gleichspannung zur Steuerung und Regelung der elektrolytischen Wasserdesinfektion
ITMI20092038A1 (it) * 2009-11-19 2011-05-20 Antical S R L Apparecchiatura per il contollo della durezza dell'acqua, per impianti di distribuzione delll'acqua in genere.
JP2012020264A (ja) * 2010-07-16 2012-02-02 Mitsubishi Electric Corp 水の殺菌方法、水の殺菌装置、並びに水の殺菌装置を用いた空気調和機、手乾燥機及び加湿器
EP2262739A4 (fr) * 2008-04-07 2012-07-11 Arc Aroma Pure Ab Dispositif pour neutralisation de microorganismes
DE102012007236A1 (de) * 2012-04-07 2013-10-10 Necon Gmbh Gerät zur elektrophysikalischen Wasseraufbereitung
WO2016087461A1 (fr) * 2014-12-01 2016-06-09 Eko Harden Technologies Oy Amélioration en matière de et concernant le traitement de matrices et/ou les contenus de matrices
EP2520548A4 (fr) * 2009-12-30 2016-11-30 Sergio Gabriel Capettini Procédé et appareil permettant de désinfecter l'eau afin de produire des ions hydroxyles par hydrolyse des molécules d'eau
WO2017079784A1 (fr) * 2015-11-10 2017-05-18 Micromet Pty Ltd Procédé de réglage de dose de traitement électrique pour le traitement électrolytique d'eaux usées
EP3351514A4 (fr) * 2015-09-14 2019-03-27 Yanbo Li Procédé de traitement d'eaux usées faisant appel à un dispositif à électrode électrochimique

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US4734176A (en) * 1987-01-27 1988-03-29 Pure-N-Simple Pulsed ion generator for water purification system
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WO2001089997A3 (fr) * 2000-05-11 2002-05-02 Megaton Systems As Moyen de traitement de l'eau
WO2003082750A1 (fr) * 2002-04-03 2003-10-09 Advanced Oxidation Limited Appareil et procede de traitement d'un effluent
DE102004005303A1 (de) * 2004-01-29 2005-08-11 Gao, Yuan, Dipl.-Ing. Verfahren und Vorrichtung mit speziellen Sensoren und speziell ausgebildeter Gleichspannung zur Steuerung und Regelung der elektrolytischen Wasserdesinfektion
EP2262739A4 (fr) * 2008-04-07 2012-07-11 Arc Aroma Pure Ab Dispositif pour neutralisation de microorganismes
US8475712B2 (en) 2008-04-07 2013-07-02 Arc Aroma Pure Ab Arrangement for neutralisation or microorganisms
ITMI20092038A1 (it) * 2009-11-19 2011-05-20 Antical S R L Apparecchiatura per il contollo della durezza dell'acqua, per impianti di distribuzione delll'acqua in genere.
EP2520548A4 (fr) * 2009-12-30 2016-11-30 Sergio Gabriel Capettini Procédé et appareil permettant de désinfecter l'eau afin de produire des ions hydroxyles par hydrolyse des molécules d'eau
JP2012020264A (ja) * 2010-07-16 2012-02-02 Mitsubishi Electric Corp 水の殺菌方法、水の殺菌装置、並びに水の殺菌装置を用いた空気調和機、手乾燥機及び加湿器
DE102012007236A1 (de) * 2012-04-07 2013-10-10 Necon Gmbh Gerät zur elektrophysikalischen Wasseraufbereitung
WO2016087461A1 (fr) * 2014-12-01 2016-06-09 Eko Harden Technologies Oy Amélioration en matière de et concernant le traitement de matrices et/ou les contenus de matrices
EP3351514A4 (fr) * 2015-09-14 2019-03-27 Yanbo Li Procédé de traitement d'eaux usées faisant appel à un dispositif à électrode électrochimique
WO2017079784A1 (fr) * 2015-11-10 2017-05-18 Micromet Pty Ltd Procédé de réglage de dose de traitement électrique pour le traitement électrolytique d'eaux usées

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