WO2013043047A1 - Dispositif et procédé de désinfection d'un liquide à l'aide d'ondes acoustiques et de rayons uv - Google Patents

Dispositif et procédé de désinfection d'un liquide à l'aide d'ondes acoustiques et de rayons uv Download PDF

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Publication number
WO2013043047A1
WO2013043047A1 PCT/NL2012/050660 NL2012050660W WO2013043047A1 WO 2013043047 A1 WO2013043047 A1 WO 2013043047A1 NL 2012050660 W NL2012050660 W NL 2012050660W WO 2013043047 A1 WO2013043047 A1 WO 2013043047A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
channel
transducers
particles
filter
Prior art date
Application number
PCT/NL2012/050660
Other languages
English (en)
Inventor
Hendrik Jannes CAPPON
Karel Jacob KEESMAN
Mateo Jozef Jaques Mayer
Original Assignee
Stichting Wetsus Centre Of Excellence For Sustainable Water Technology
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 Stichting Wetsus Centre Of Excellence For Sustainable Water Technology filed Critical Stichting Wetsus Centre Of Excellence For Sustainable Water Technology
Publication of WO2013043047A1 publication Critical patent/WO2013043047A1/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
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • 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
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]

Definitions

  • the present invention relates to a disinfecting method for a liquid such as drinking water.
  • UV disinfection
  • One of the problems encountered in practice when applying UV to a liquid is how to ensure that all particles, such as micro- organisms, in the liquid to be treated are killed by the UV radiation.
  • This problem requires a specific design for the tube or reactor such that the reactor behaves as a plug flow reactor, while the liquid is ideally mixed in the radial direction.
  • this requires a relatively low fluid velocity and/or the use of auxiliary baffles to create turbulence in the liquid. This increases flow resistance and pumping costs.
  • the object of the present invention is to provide a method for disinfecting a liquid that obviates or at least reduces the afore-mentioned problems.
  • the specific configuration and/or dimensions of the process can be designed depending on characteristics of the entire process, including desired throughput, and liquid and particle characteristics. These particles specifically relate to micro-organisms that need to be killed for
  • the channel may relate to a tube, pipe, conduit or reactor.
  • the liquid specifically relates to drinking water or waste water that needs to be treated.
  • the transducers are capable of producing waves that interfere and due to this wave interference produce a filter structure with the generated nodes and/or node regions. To produce a filter at least one transducer needs to be
  • transducers can be provided to achieve the desired interference.
  • the transducers produce the acoustic waves with as primary function to generate the desired filter to hinder the particles, such as the micro-organisms that need to be treated.
  • the UV-source is capable of more effectively treating and killing the particles with UV-radiation .
  • the acoustic waves of the transducers are ultrasound waves.
  • the frequencies used by the transducers are in the range of 20kHz-100 MHz, more
  • the amplitude, i.e. the power, of the acoustic waves is preferably low enough such that the acoustic waves by themselves do not disinfect the liquid, e.g. do not kill micro-organisms.
  • the disinfecting is effected by the UV-source, while the acoustic waves preferably "only" hinder the particles.
  • the nodes attract the particles. More specifically, this filter of nodes attracts the particles, such as the micro-organisms, in the liquid.
  • the residence times, and in fact the residence time distributions, of the liquid itself and the particles, such as the micro-organisms start to differ. More specifically, the residence time difference is such that the micro-organisms to be killed remain for a
  • the throughput of the liquid through the channel can be
  • capacity/throughput of the process can be increased and/or the dimensions of the required equipment for disinfecting the liquid can be reduced.
  • the hindrance of micro-organisms by the three- dimensional filter is such that the residence time
  • the particles can be "captured" in de nodes and/or node regions such that in principle the residence time for these particles can be infinite. Also, it is possible to change the characteristics of the waves and/or periodically switching off the
  • the transducers are preferably provided at the side- walls of the channel, and more preferably in side channels of the liquid channel.
  • the side channels can be provided along the same axes and/or along parallel axes and/or positioned at an angle relative to each other.
  • the liquid channel can be a cylindrical or rectangular fluid channel with a liquid inlet and a liquid outlet that is provided with at least one UV radiation source, preferably capable of providing UV-C radiation.
  • a further advantage of the method according to the present invention is that no physical membranes, or other physical components in the flow stream, are required. This reduces costs and minimizes down-time of the type process for cleaning purposes, for example. Cleaning this
  • acoustically achieved filter only requires switching on and off the transducers. Also, the acoustic waves prevent fouling of the UV-source, for example a quartz tube in which a UV lamp is placed, and side walls of the channel. This improves the efficiency of the UV-radiation and prevents additional cleaning.
  • the UV-source for example a quartz tube in which a UV lamp is placed
  • side walls of the channel This improves the efficiency of the UV-radiation and prevents additional cleaning.
  • a further advantage is that the method according to the invention can be easily adapted to micro-organisms, or particles, to be treated without requiring significant amendments to the process equipment. This improves the flexibility of the method according to the invention for disinfecting liquids.
  • the method according to the invention is able to disinfect a liquid without the use of chemicals in an effective and efficient manner. Also, it can be applied on both a small scale of a few litres per hour and a large scale of with thousands of m 3 per hour. In addition, the method can be applied in a continuous and/or semi-continuous and/or batch process, periodically or continuously.
  • the filter has as a further step
  • the particles are concentrated in the nodes of the filter. This enables a specific orientation and configuration of the UV-source such that the UV treatment can be made more effective. This reduces the required amount of UV-radiation while at the same time improving the killing ratio significantly.
  • one or more of the one or more transducers are oriented under acute and/or obtuse angles.
  • transducers under acute and/or obtuse angles an effective filter for hindering the particles is achieved.
  • the transducer ( s ) and/or reflector (s) would be provided at an angle of 90° to the longitudinal direction of the channel a line filter or planar filter would be achieved.
  • a line filter or planar filter would be achieved.
  • the angle is between 1° and 89°, more preferably between 3° and 85°.
  • acute angles between 5° and 80° appear to be very effective for achieving a three-dimensional filter structure for hindering and/or capturing particles in a liquid to be disinfected.
  • the transducers can be provided at an obtuse angle between 91° and 179°, preferably between 93° and 175°.
  • obtuse angles between 95° and 170° appear to be very effective for disinfecting a liquid .
  • transducers can be provided at one similar angle, it is also possible in accordance with to the invention to provide transducers at different angles, either acute or obtuse, or any mixture thereof. This would intensify the filter structure and can be considered a design parameter.
  • the angles can be selected depending on the liquid and/or particle
  • the liquid is provided to the channel as a substantially laminar flow.
  • the method comprises the step of adjusting the frequency and/or amplitude of one or more of the generated acoustic waves by a controller.
  • a flexible method is achieved. This improves the overall flexibility of the method according to the present invention.
  • all transducers of the transducers can be controlled independently by the
  • controller involving a processor and relevant software.
  • the controller receives information about the liquid and/or the particles therein from a sensor measuring the liquids.
  • This sensor may involve acoustic measurements, light scattering measurements, light
  • the method comprises the additional step of providing a second filter in series.
  • This second, and optionally further, filter is preferably
  • an overall process controller such that an individual filter can be generated that focuses on a
  • the present invention also relates to a disinfection device for disinfecting liquid containing micro-organisms, the device comprising:
  • one or more transducers for generating an acoustic wave in the liquid channel such that in use a filter with nodes and/or node regions is achieved wherein micro-organisms are hindered, and wherein the one or more transducers are oriented under an acute and/or obtuse angle;
  • an UV-source for providing UV-radiation to the liquid in the liquid channel for killing the micro-organisms
  • the disinfection device according to the present invention is capable of performing the method according to the present invention. This enables an effective and efficient treatment of a liquid, such as drinking water and waste water.
  • the invention further also relates to a system for disinfecting a liquid, the system comprising a disinfecting device capable of performing the method that were described before .
  • a system for disinfecting a liquid comprising a disinfecting device capable of performing the method that were described before .
  • Such system provides the same effect and advantages as those described for the method and/or disinfection device according to the invention.
  • the system according to the invention can be provided at
  • disinfection devices are provided in series to improve the overall treatment of the liquid and/or in parallel to increase the capacity of the process.
  • fig. IB shows a simulated node pattern
  • fig. 2 shows a system comprising the components of figure 1 for disinfecting a liquid
  • fig. 3 shows illustrative residence time
  • Liquid channel 2 (figure 1A) is provided with inlet 4 and outlet 6. It is noted that figure 1 is one of the many possible embodiments of the technology according to the present invention and other configurations according to the invention are also possible, e.g. with additional side channels .
  • channel 2 is a
  • channel 2 cylindrical or rectangular liquid channel.
  • Other shapes of channel 2 and other channels are possible.
  • a large number of other geometrical shapes of the first fluid channel are technically feasible according to the invention.
  • Liquid channels 8,10 are the second and third liquid side channels, respectively.
  • Side channels 8,10 are provided with first and second acoustic sound generating means or transducers 12,14, respectively.
  • Angle ⁇ relates to the angle between the first channel 2 and the second side channel 8. According to the illustrated embodiment of the present invention, this angle is at least 5 degrees. It is noted that the angles between the different side channels 8, 10 and the first fluid channel 2 may be different. It is also noted that the location at which each fluid side channel is connected to first cylindrical or rectangular fluid channel 2 is a design parameter.
  • Transducer 12 provides signal 16, such that a sinusoid results with amplitude 18 and period 20 (see figure 1A for an illustrative representation of signal 16) .
  • Transducer 14 provides signal 22, such as a sinusoid with amplitude 24 and period 26.
  • Node 28 or node region 30 captures particles, such as micro-organisms 32, that are present in liquid 34. Due to wave interference between the two waves/signals 16, 22 a standing wave with nodes 28 can be achieved. It is noted that in the illustrated embodiment transducer 14 can be a reflector. Also, additional transducers 12,14 (not shown) may be provided to enlarge the filter area in channel 2 with nodes 28.
  • controller 54 three- dimensional structure 29 can be adjusted to liquid and/or particle characteristics.
  • System 36 for UV disinfection of water 34 (figure 2) comprises a water supply 30, pump 40 and channel 2.
  • sensor 42 measures one or more properties of water 34, such as temperature, amount and/or type of particles 32, and dielectrical constant.
  • channel 2 is provided with four side channels 8,10 and four transducers 12,14, respectively. At the end of channel 2 sensor 44 measures one or more
  • the UV-radiation 48 preferably UV-C radiation, from UV-source 46 destroys the micro-organisms 32 that are captured in nodes 28 and/or node regions 30.
  • UV-source 46 provides UV-radiation 48 to the liquid in channel 2.
  • the UV-radiation source is a gas discharge tube placed in a quartz tube that is placed on its turn inside of the first cylindrical or rectangular channel 2.
  • other UV-sources can be applied, such as UV-LED's.
  • the capture of micro-organisms 32 achieves a significant longer residence time for these particles 32 as compared to liquid 34 (see the residence times and their distributions for liquid 34 and particles 32 in figure 3) . This provides a good opportunity for UV-source 46 to treat particles 34.
  • nodes 28 and/or node regions 30 act as filter 29 or particle concentration volume.
  • Controller 54 adjusts transducers 12,14 such that a filter is created to achieve residence time differences between liquid 34 and particles 32. This time difference enables UV-source 46 to treat particles 32 to disinfect liquid 32.
  • the sensing principle of at last one sensor 42,44 for sensing the fluid properties in channel 2 is based upon at least one of the following sensing techniques: acoustic measurements, light scattering measurements, light
  • these measurements preferably comprise temperature measurement using infrared technology and/or PTC s and/or NTC's and/or PtlOO sensing elements preferably sensing elements preferably placed in channel 2 and/or connected to the inner wall and/or outer wall of channel 2.
  • Signals 50,52 produced by sensors 42,44 for sensing the fluid properties are fed to controller 54 such as a
  • Controller 54 is provided with software for controlling acoustics wave generating means 12,14.
  • the software contains a feedback loop from sensor 42,44 to the acoustic wave
  • generating means 12,14 providing control signals 56 to transducers 12,14.
  • the disinfected liquid is provided to system output 58.
  • feedback loop 60 feeds back a part of the disinfected liquid for an additional disinfecting treatment.
  • Controller 54 adjusts transducers 12,14, preferably using sensors 42,44, such that a filter 29 is produced that achieves the desired residence time difference between liquid 34 and particles 34.
  • the time difference enables UV- source 46 to kill micro-organisms 32 that are captured in nodes 28 and/or node regions 30.
  • liquid channel 2 having a diameter of about 26 mm and a length of about 500 mm.
  • Transducers 12,14 have a power of about 10 Watt and are controlled by programmable controller 54.
  • channel 2 is filled with water.
  • Biomass particles 34 with a diameter of about 0,5 mm are added to the water and the mixture starts moving through channel 2.
  • Particles 32 are captured in nodes 28 and/or node regions 30.
  • transducers 12,14 have been switched off particles 34 start moving again along channel 2 and away from nodes 28 and/or node regions 30. This illustrates the filter operation.
  • the present invention is by no means limited to the above-described embodiments thereof.
  • the rights sought are defined by the following claims within the scope of which many modifications can be envisaged.
  • the inner wall of channel 2 can be manufactured with reflecting properties .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physical Water Treatments (AREA)

Abstract

L'invention concerne un procédé, un dispositif et un système de désinfection d'un liquide. Plus particulièrement, le procédé consiste à tuer les micro-organismes dans l'eau potable, par exemple. Le procédé de l'invention consiste à: placer le liquide dans un circuit de liquide; générer une ou plusieurs ondes acoustiques à l'aide d'un ou de plusieurs transducteurs; générer un filtre de noeuds et/ou de régions nodales à l'aide des ondes acoustiques, de manière à neutraliser les particules présentes dans le liquide; et traiter le liquide aux UV à partir d'une source d'UV.
PCT/NL2012/050660 2011-09-19 2012-09-19 Dispositif et procédé de désinfection d'un liquide à l'aide d'ondes acoustiques et de rayons uv WO2013043047A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1039050 2011-09-19
NL1039050A NL1039050C2 (en) 2011-09-19 2011-09-19 Device and method for a uv disinfection reactor.

Publications (1)

Publication Number Publication Date
WO2013043047A1 true WO2013043047A1 (fr) 2013-03-28

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PCT/NL2012/050660 WO2013043047A1 (fr) 2011-09-19 2012-09-19 Dispositif et procédé de désinfection d'un liquide à l'aide d'ondes acoustiques et de rayons uv

Country Status (2)

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NL (1) NL1039050C2 (fr)
WO (1) WO2013043047A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2700505C1 (ru) * 2018-09-20 2019-09-17 Сергей Алексеевич Бахарев Способ безреагентной очистки и обеззараживания воды
RU2708585C1 (ru) * 2019-07-16 2019-12-09 Общество с ограниченной ответственностью "ТВК" Устройство для обеззараживания питьевой воды УФ излучением
FR3095200A1 (fr) * 2019-04-18 2020-10-23 Nabil DIFAÏ Dispositif de dégradation de la pollution d’eaux usées et/ou de boues

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672823A (en) * 1970-03-25 1972-06-27 Wave Energy Systems Method of sterilizing liquids
WO2007143971A2 (fr) * 2006-06-12 2007-12-21 Drk-Blutspendedienst Baden-Württemberg-Hessen Gmbh Procédé et dispositif d'inactivation de virus et/ou de bactéries dans des milieux liquides, en particulier dans le plasma sanguin et/ou le sérum conservé
DE102008008892A1 (de) * 2008-02-13 2009-08-20 Aquaworx Ag Vorrichtung zur Aufbereitung von Flüssigkeiten
US20100078384A1 (en) * 2008-09-26 2010-04-01 Abbott Laboratories Apparatus and method for separation of particles suspended in a liquid from the liquid in which they are suspended

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2442218A1 (fr) * 1978-11-27 1980-06-20 Hyco & Aulas Ets Procede de traitement d'epuration et notamment de sterilisation de liquides et plus particulierement de l'eau
JPS6377592A (ja) * 1986-09-22 1988-04-07 Ebara Res Co Ltd オゾンによる処理方法及びその装置
EP1828059B1 (fr) * 2004-11-17 2013-11-20 Ashland Licensing and Intellectual Property LLC Procedes de traitement de fluides de refroidissement utilises dans la fabrication de pneus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672823A (en) * 1970-03-25 1972-06-27 Wave Energy Systems Method of sterilizing liquids
WO2007143971A2 (fr) * 2006-06-12 2007-12-21 Drk-Blutspendedienst Baden-Württemberg-Hessen Gmbh Procédé et dispositif d'inactivation de virus et/ou de bactéries dans des milieux liquides, en particulier dans le plasma sanguin et/ou le sérum conservé
DE102008008892A1 (de) * 2008-02-13 2009-08-20 Aquaworx Ag Vorrichtung zur Aufbereitung von Flüssigkeiten
US20100078384A1 (en) * 2008-09-26 2010-04-01 Abbott Laboratories Apparatus and method for separation of particles suspended in a liquid from the liquid in which they are suspended

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2700505C1 (ru) * 2018-09-20 2019-09-17 Сергей Алексеевич Бахарев Способ безреагентной очистки и обеззараживания воды
FR3095200A1 (fr) * 2019-04-18 2020-10-23 Nabil DIFAÏ Dispositif de dégradation de la pollution d’eaux usées et/ou de boues
RU2708585C1 (ru) * 2019-07-16 2019-12-09 Общество с ограниченной ответственностью "ТВК" Устройство для обеззараживания питьевой воды УФ излучением

Also Published As

Publication number Publication date
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