WO2000074814A1 - Dispositif de traitement d'un echantillon contenant des particules - Google Patents

Dispositif de traitement d'un echantillon contenant des particules Download PDF

Info

Publication number
WO2000074814A1
WO2000074814A1 PCT/JP1999/003023 JP9903023W WO0074814A1 WO 2000074814 A1 WO2000074814 A1 WO 2000074814A1 JP 9903023 W JP9903023 W JP 9903023W WO 0074814 A1 WO0074814 A1 WO 0074814A1
Authority
WO
WIPO (PCT)
Prior art keywords
vibration
filter
liquid
particles
sample
Prior art date
Application number
PCT/JP1999/003023
Other languages
English (en)
Japanese (ja)
Inventor
Masuyoshi Yamada
Kenichi Kawabata
Shinichiro Umemura
Yoshitoshi Ito
Minoru Sakairi
Original Assignee
Hitachi, 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 Hitachi, Ltd. filed Critical Hitachi, Ltd.
Priority to PCT/JP1999/003023 priority Critical patent/WO2000074814A1/fr
Publication of WO2000074814A1 publication Critical patent/WO2000074814A1/fr

Links

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

Definitions

  • the present invention relates to an apparatus for separating, capturing, and concentrating particles in a sample.
  • the form of ultrasonic waves used to capture particles is as follows: 1) Forming a standing wave using a planar ultrasonic transducer and reflector to concentrate red blood cells in blood (World Kongless on Ultrasonics) , Pp. 320, 199 7), 2) Using an ultrasonic transducer with a concave shape, a flat plate reflector was set at the focal point of the concave surface to form a standing wave, focusing on the target particle. There is one that captures and moves near the reflecting plate on the shaft (Japanese Patent Application Laid-Open No. 9-193055).
  • JP Hei 8-28 1 It is in the 0 220 publication.
  • JP Hei 8-28 1 It is in the 0 220 publication.
  • In 4) above there is no inlet between the vibrator and the reflecting member, and there is no disclosure about the configuration in the case where there is an inlet.
  • In 5) above there is a figure in which an inlet is provided between the ultrasonic vibrator and the reflective member, but there is no outlet between the ultrasonic vibrator and the reflective member, and the outlet is provided. There is no disclosure of the configuration in the case of Disclosure of the invention
  • the present invention is characterized by using the following apparatus and method.
  • an ultrasonic field is formed between the ultrasonic transducer and a filter using a filter with sufficient strength to reflect ultrasonic waves (thickness: 0.1mm or more).
  • the liquid containing particles is introduced from the inlet provided between the vibration member that generates ultrasonic waves and the filter, and the particles in the liquid are captured and concentrated in the liquid in a non-contact manner by the radiation pressure of the ultrasonic waves.
  • the liquid is discharged out of the apparatus through a filter used as a reflection member.
  • the particles to be captured are captured and concentrated without adhering to the filter, and are collected from an outlet provided between the vibration member that generates ultrasonic waves and the filter. Since the particles in the liquid do not adhere to the filter, the recovery rate is higher than that of the conventional suction filtration method. Also, regarding the clogging of the filter, the frequency of clogging is greatly reduced because particles do not adhere to the filter surface.
  • a pretreatment device for separating contaminants having a large particle size other than particles to be captured a non-contact capturing device using standing ultrasonic waves while flowing sample water is provided.
  • the target particles and microorganisms flow downstream without being captured. In other words, the liquid obtained downstream has only contaminants removed.
  • the separation device described in 3 above is used as a pretreatment device for the capture device described in 1 above.
  • the liquid treatment apparatus including the particles of the present application includes a separator 3 for removing foreign substances other than the capture target and a capturer 30 for capturing the target particles.
  • the sample liquid 1 containing particles is introduced into the inside of the apparatus using the pump 2.
  • the sample water first enters the separator 3, and only impurities having a large particle size remain in the separator 3, and the particles to be captured do not stay in the apparatus but are discharged downstream and enter the trap 30.
  • a filter 29 is provided, and the target particles are trapped in the device 30 in a non-contact manner.
  • the liquid is discharged downstream of the device 30.
  • each of the separator 3 and the trap 30 can be used as an independent device.
  • the concentrated liquid accumulated in the trap 30 can be taken out and observed with a microscope.
  • a water purification device monitor the concentration of particles collected in the separator 3 or the trap 30 with a sensor, and if an abnormal increase in concentration occurs, turn on a warning lamp or stop water intake.
  • this device can be used as a device for capturing and concentrating Cryptosporidium in water.
  • the conventional method for detecting cryptosporidium in water treatment plants is based on the provisional countermeasures guidelines issued by the Ministry of Health and Welfare in October 1996, and the procedure is as follows.
  • the above-mentioned cryptosporidium detection method requires a great deal of time to concentrate and recover particles in the sample water, and adheres to the filter when dissolving the filter to recover the residue remaining on the filter.
  • the recovery rate is low because some cryptosporidium cannot be recovered.
  • the cryptosporidium after removing contaminants by the separator 3, the cryptosporidium can be captured in a non-contact manner by the capture device 30, so that a configuration capable of improving the recovery rate and shortening the operation time is provided. I do.
  • the present invention provides a first container for separating a substance contained in a flowing sample, a vibration member for applying vibration to the sample in the first container, and a reflection member for reflecting vibration from the vibration member.
  • a separator for introducing a sample from the vibrating member side of the first container, and an outlet for discharging the sample separated by vibration on the reflecting member side.
  • a separator for separating a substance in a liquid having a vibrating member and a reflecting member which is a combination of the above, and a trap comprising a vibrating member and a filter downstream of the separator for capturing particles in the liquid.
  • a treatment device for a liquid containing particles having the following. Furthermore, a first supply pipe for supplying the liquid containing particles in parallel to the plurality of separators, and a second supply pipe for supplying the liquid containing particles discharged from the plurality of separators to the plurality of traps in parallel.
  • a liquid treatment apparatus including particles having a supply pipe.
  • the inlet for collecting the concentrated second liquid captured in the second container, and the filter A liquid treatment device containing particles having a second outlet for discharging the third liquid, and an inlet for introducing a gas for collecting the second liquid.
  • FIG. 1 is a block diagram of an apparatus for treating a liquid containing particles, provided with an apparatus for separating contaminants of liquid particles and a capturing apparatus according to the present invention.
  • FIG. 2 is a device configuration diagram of the separation device.
  • FIG. 3 is a cross-sectional view of the separation device.
  • FIG. 4 is a cross-sectional view of the separation device.
  • FIG. 5 is a conceptual diagram of ultrasonic capture when a spherical reflecting member is used.
  • FIG. 6 is a conceptual diagram of ultrasonic capture when a spherical reflecting member is used.
  • FIG. 7 is a conceptual diagram of ultrasonic capture when a planar reflecting member is used.
  • FIG. 8 is a conceptual diagram of ultrasonic capture when a planar reflecting member is used.
  • FIG. 1 is a block diagram of an apparatus for treating a liquid containing particles, provided with an apparatus for separating contaminants of liquid particles and a capturing apparatus according to the present invention.
  • FIG. 2 is a
  • FIG. 9 is a diagram of a flow path layout in the particle separation device.
  • FIG. 10 is a diagram showing an example of the result of the concentration rate of the particle separation device.
  • FIG. 11 is a diagram showing an example of the results of the separation performance of the particle separation device.
  • FIG. 12 is an apparatus configuration diagram according to the present invention using an optical sensor.
  • FIG. 13 is a configuration diagram when measuring scattered light as an optical sensor.
  • FIG. 14 is a configuration diagram when measuring scattered light as an optical sensor.
  • FIG. 15 is a configuration diagram when measuring transmitted light as an optical sensor.
  • FIG. 16 is a configuration diagram when a plurality of separation devices are connected in series.
  • FIG. 17 is a configuration diagram when a plurality of separation devices are connected in parallel.
  • FIG. 18 is a configuration diagram of a particle capturing device according to the present invention.
  • FIG. 19 is a configuration diagram of a particle capturing device according to the present invention.
  • FIG. 20 is a configuration diagram of a particle capturing device according to the present invention.
  • FIG. 21 is a cross-sectional view of the capturing device.
  • FIG. 22 is a cross-sectional view of the capturing device.
  • FIG. 23 is a device configuration diagram when a plurality of capturing devices are connected in series.
  • Figure 24 shows the separation device and capture device.
  • FIG. 3 is a device configuration diagram when a buffer tank is provided in FIG.
  • FIG. 25 is an apparatus configuration diagram when a plurality of separation devices and a plurality of capture devices are connected.
  • FIG. 26 is a diagram showing a comparison between the conventional method of Cryptosporidium inspection and the case of using the apparatus according to the present invention.
  • FIG. 27 is a diagram showing an example of application of a water inspection system according to the present invention.
  • FIG. 28 is a diagram showing an application example of the water treatment system according to the present invention.
  • FIG. 29 is a diagram showing an example of application of the water treatment system according to the present invention.
  • FIG. 30 is a diagram showing an application example of the drinking water purification device according to the present invention.
  • FIG. 2 shows an embodiment of the separation apparatus.
  • the sample liquid 1 containing the particles is introduced into the apparatus using the pump 2.
  • the liquid sample introduction flow rate is from several milliliters to several liters per minute.
  • the pump 2 has a mechanism capable of adjusting the discharge flow rate, such as a tube pump or a diaphragm pump.
  • the sample water that has passed through the pump 2 is branched and dispersed so that a location with a high flow velocity is not locally formed in the separation device, and a plurality of sample waters provided on the vibration member side between the vibration member 4 and the reflection member 5 are provided. Is introduced into the separation device 3 from the inlet of the separator.
  • the separation device 3 introduces the sample from the cylindrical wall, the vibration member 4 (the diameter is almost equal to the inner diameter of the separation device), the reflection member 5, and the vibration member 4 side between the vibration member 4 and the reflection member 5.
  • Inlet, and vibration member 4 and reflection member 5 An ultrasonic wave is generated between the vibrating member 4 and the facing reflecting member 5 which is constituted by an outlet for discharging the sample from the side of the reflecting member 5 therebetween.
  • a cylindrical device (the vibrating member 4 and the reflecting member 5 correspond to the top plate and the bottom plate) is used in consideration of the ease of manufacturing and processing, but may be a rectangular parallelepiped.
  • the vibration member 4 may be any member that generates vibration, but an ultrasonic vibrator made of piezoelectric ceramics is one example.
  • the frequency of the ultrasonic wave is about several hundred kHz to about 10 MHz. Particles collect and concentrate at the nodes of the standing ultrasound. If the length of the device is longer than the wavelength, there will be multiple standing ultrasound nodes in the device, and when the inside of the separation device 3 is observed with the naked eye, the captured particles will be striped like 6 ing.
  • the frequency of the ultrasonic wave used here is 4 MHz, the wavelength in water is about 0.38 mm, and the interval between nodes is about 0.19 mm, which is half. A stripe pattern of approximately 0.19 mm is formed inside the 80 mm long device.
  • Particles in the sample liquid are captured by receiving radiation pressure under ultrasonic irradiation, and the radiation pressure is described by the following equation (1).
  • ⁇ * ⁇ 4 / ⁇ 0 c 0 3
  • A (5 p, - 2 po) / (2/0 + / oo) _ oc. 2 ) Z, c)
  • R particle radius
  • ⁇ ultrasonic angular velocity
  • ⁇ density
  • c sound velocity
  • ⁇ Is the pressure amplitude in the liquid by ultrasonic waves
  • the subscripts 0 and 1 represent particles and liquid, respectively.
  • the higher the flow rate of the sample liquid the greater the resistance force of the fluid acting on the particles. If the resistance force is higher than the radiation pressure of the ultrasonic waves, the particles escape from the capture and are discharged out of the separation device 3. Therefore By adjusting the flow rate of the sample water passing through the separation device or the intensity and frequency of the ultrasonic waves, contaminants other than the particles to be finally caught are captured and removed in a non-contact manner in the separation device 3. You can do it.
  • the presence or absence and concentration of the striped pattern 6 of the contaminants formed in the separation device 3 is detected by the optical sensor 7 installed on the side of the separation device 3 by irradiating the laser with one light on the striped pattern. Is done.
  • the laser beam is irradiated in parallel with the direction in which the ultrasonic wave travels in such a way that one laser beam passes through each of the stripe patterns formed in the device, and the change in the amount of transmitted light is measured to determine the stripe pattern.
  • the presence or absence and the density can also be detected.
  • the concentrated contaminants can be discharged in a timely manner. The specific method will be described later.
  • the liquid containing the target particles is discharged from a plurality of outlets provided in the same manner as the inlet, and the target particles are captured by the filter 8.
  • the target particles are cryptosporidium (diameter of 4 to 6 m)
  • a membrane filter having a pore diameter of 1 // m to 2 ⁇ is suitable as the filter 8 to be used. According to the detection method established by the Ministry of Health and Welfare, this filter can be stained for Cryptosporidium detection and observed under a microscope. At this time, since contaminants have been removed by the separation filter, measurement errors during microscopic observation are reduced, and laborious operations such as filter dissolution and centrifugation are not required.
  • Figure 3 shows a sectional view of the separation device.
  • the dimensions shown are just an example, so long as they have no attenuation of ultrasonic waves and can capture particles. The same applies to the shape.
  • the reason why there are a plurality of liquid inlets and outlets 9 is as described above because a portion having a high flow velocity is not locally formed as described above, and the number of inlets or outlets may be further increased.
  • the vibrator 4 is bonded to a solid wall, ultrasonic waves are irradiated through the solid wall into the liquid, and a standing wave is formed between the opposing reflecting members. Is also good. In this case as well, the same effect as in the case where the liquid in the device is brought into direct contact with the vibrator with the vibrator sandwiched between the packings can be obtained. If it is not desirable for the vibrator to directly contact the liquid inside the device, it is better to make it as shown in FIG. However, in this case, it is necessary to make the thickness of the bonded wall an integral multiple of half a wavelength so that the ultrasonic wave can be transmitted to the liquid efficiently.
  • the electrodes of the vibrator 4 have + and 1 silver electrodes on the front and back, respectively.However, it is preferable that the lead wire comes out from the side not in contact with water, so the electrode on the side that is in contact with water is opposite. It is partially folded on the side surface. However, since the electrode in contact with water is also coated with nickel, the silver electrode does not directly come into contact with water.
  • the position of the reflecting member 5 can be moved, but there is no problem if the reflecting member 5 is fixedly used.
  • the shape of the reflecting member if a plate with a spherical surface (radius of about 100 to 100 mm) is used, as shown in Fig. 5, even if the processing accuracy or assembly accuracy of the surface is somewhat poor, The positions where the ultrasonic waves are strengthened by the reflected waves are concentrated around the central axis of the cylindrical device. This is because the position where the traveling wave of the plane and the reflected wave of the concave surface strengthen each other forms a set of concentric concentric circles centered on the central axis. Set shape It is easy to capture particles stably just by distorting.
  • the particles in the liquid are captured in the form of a cone centered on the central axis of the device as shown in Fig. 6.
  • both the ultrasonic transducer and the reflecting member are made flat in shape and placed in parallel to form a standing wave, as shown in Fig. 7, the effect of slight surface distortion or parallelism distortion
  • the positions where the traveling wave and the reflected wave strengthen are dispersed, and the positions where the particles are captured are also dispersed as shown in FIG.
  • a concave shape may be used for the vibrating member, and a planar shape may be used for the reflecting member.
  • the vibrating member has a planar shape and the reflecting member has a concave shape in consideration of ease of manufacture.
  • the method of flowing the sample water in the separation device 3 is as follows.
  • the starch particles (particle size: about 100 m) in the sample water are sonicated by the two methods shown in Fig. 9 (A) and Fig. 9 (B).
  • Fig. 10 shows how they are captured and concentrated.
  • (B) can be concentrated about three times more than (A).
  • Fig. 9 (A) since the sample is introduced from the lower part of the device, a part where the flow velocity is high locally occurs in the lower part of the device.
  • Figure 11 shows the separation of contaminants and microorganisms using the device shown in Figure 3.
  • Soluble starch particle size is 20 // m or more
  • microorganism is a positive control of cryptosporidium (particle size).
  • the concentration of starch was 0.02 g / lit and the concentration of crisp was 0.56 / z g Zl.
  • the liquid containing these two types of particles was passed through a separation device.
  • the horizontal axis of the graph shows the flow rate of the sample water passing through the separation device, and the vertical axis shows the ratio of the concentration of particles compared to the stock solution. In other words, it indicates that when it is larger than 1, it becomes darker than the stock solution.
  • the concentration of Cryptosporidium passed through the device without changing the concentration from the undiluted solution in both the liquid in the device and the effluent.
  • starch with a large particle size has a higher concentration in the device when the flow rate is 40 m 1 / min or less, and is thinner in the discharged liquid.
  • Optical sensor 8 uses a laser oscillator 1 4 Contact and photodetector 1 5 provided outside the separation device, the changes in the transmitted light amount or scattered light from the sensor as an analog signal, as shown in FIG. 1 2, The time variation of the concentration of the captured contaminant particles can be displayed or recorded on the signal output screen 16 online.
  • Optical sensors measure the change in concentration over time: 1) irradiating the stripe pattern and measuring the scattered light; 2) irradiating the stripe pattern with laser light parallel to the direction in which the ultrasonic waves travel. Measurement of transmitted light. In the case of 2), when a concave shape is used for the reflecting member, stripes are formed in a conical shape around the center axis of the device as shown in Fig. 6.
  • the N ratio increases.
  • the positions where the particles are captured are dispersed as shown in Fig. 8, so that a single laser beam is irradiated in parallel to the direction in which the ultrasonic wave travels, It is better to measure the sum of and determine the concentration. Scattered by light passing through the separation device or captured contaminant particles When the emitted light reaches a certain level, that is, when a stripe pattern of a certain density or more is formed, an alarm can sound or a warning lamp can be turned on.
  • this device is used as a water treatment device, the concentration change over time is recorded and monitored.If the concentration increases sharply compared to the normal concentration increase, it is considered that there is an abnormality in the raw water intake. Judgment can be taken and measures can be taken such as stopping the intake or switching to another intake.
  • the specific concentration is determined as follows. First, the relationship of the concentration of the contaminant particles in the separation device and the time for applying ultrasonic waves to the device has the following equation (2).
  • C represents the concentration in the apparatus
  • N represents the concentration of raw water
  • t represents time
  • a semiconductor laser is incident from the entrance 17 on the side of the separation device, and the light scattered by hitting the trapped foreign particles is passed through the optical fiber 18
  • the concentration of trapped particles or the presence / absence of particles can be measured by converting them into electric signals by means of a photodiode.
  • a mirror 19 is installed on the side of the separation device to increase the sensitivity, and laser light can be repeatedly applied to particles in the device to increase the intensity of scattered light.
  • reflected scattered light as shown in FIG. 14, a light emitting / receiving optical fiber-to-optical fiber cable 20 and a lens 21 are installed on the reflecting member 5 so that the emitted laser light hits the particles.
  • the light emitting / receiving integrated optical fiber cable may be attached to the vibration member 4.
  • the optical fiber cable for laser emission 25 and the lens 26 on the reflecting member 5, and set the center of the vibrating member on the opposite side of the device.
  • a hole is made in the section, and an optical fiber 27 for receiving light is provided. Since the laser beam 28 emitted from the optical fiber cable 25 for optical projection passes through the lens 26 and passes through the lens 26 while being attenuated by each of the stripes 6 of the particles captured in the device, The light intensity decreases compared to the amount of incident light. By measuring the degree of this decrease in advance, the amount of captured particles can be relatively specified. This method is effective when the concentration of the sample water is low because the measurement is performed by integrating each stripe in the device.
  • a concave reflecting member when used as shown in FIG. 6, it is preferable to irradiate the laser beam so as to pass through the center of the formed cone where the particles are captured in order to increase the S / N ratio.
  • a flat reflecting member when used, it is better to irradiate a plurality of laser beams to make it a target of measurement as well as the center.
  • the scattered light measurement and transmitted light measurement described above can be used in an appropriate combination.
  • the first separator is discharged. If the outlet and the inlet of the second separator are connected by a pipe and the separation device is installed in series, it is possible to separate the impurities due to the difference in particle size or density. For example, among the separators installed in series, the first stage irradiates ultrasonic waves with low radiation pressure and produces relatively large particles. Capturing heavy or dense particles. The small-sized particles not captured in the first-stage separator are introduced into the second-stage separator together with the discharged liquid.
  • the second-stage separator is irradiated with ultrasonic waves having a radiation pressure stronger than that of the first stage, and the particles not captured in the first stage are captured.
  • the target particles and microorganisms that have passed through the first-stage and second-stage separators are captured by the filter 8. By adjusting the radiation pressure of the first and second stage separators, particles with an appropriate diameter can be separated.
  • the capturing device is provided with a vibrating member 4 and a filter 29, between which an ultrasonic wave is formed to capture the particles in a non-contact manner.
  • the sample water containing particles is introduced from the inlet 31 provided on the vibrating member side between the vibrating member 4 of the capturing device 30 and the filter, and flows in parallel with the traveling direction of the ultrasonic wave. Particles smaller than the filter pore size that have not been captured pass through the filter 29 together with the liquid, and are discharged out of the apparatus through the discharge port 32.
  • Particles larger than the filter pore diameter in the sample water form a striped pattern 6 at intervals corresponding to the half-wavelength of the ultrasonic wave due to the ultrasonic radiation pressure, and are captured in the capturing device in a non-contact manner.
  • the vibration member 4 is bonded to the filter 29 and the filter is directly vibrated to generate ultrasonic waves.
  • a standing ultrasonic wave can be formed at the same time. It is necessary to efficiently transmit the vibration of the vibrating member 4 to the filter 29. However, since the filter is directly vibrated, the effect of preventing clogging by vibration is maximized.
  • a filter When using a frequency of several tens of kHz (20 to 100 kHz), a filter is fixed to the bottom of a cylindrical vibrating member as shown in Fig. 20 and the vibrating member is perpendicular to the cylindrical surface. It is good to vibrate in the direction (respiratory vibration).
  • the ultrasonic vibrator 4 In the case of low frequency, the ultrasonic vibrator 4 is unlikely to cause thickness vibration as in the case of FIG. 19, and therefore, as shown in FIG. 20, the filter 29 fixed to the cylindrical vibrator 4 Causes lateral vibration in the direction perpendicular to the plane. If the frequency for driving the vibrator 4 is adjusted to a resonance frequency corresponding to the thickness and radius of the filter disk 29, the filter can be vibrated efficiently.
  • both of the lead wires 37 of the vibrator project outside, so that the electrode on the inner surface of the cylinder is partially folded back.
  • the electrode on the inner surface of the cylinder is coated so that it does not come into contact with water.
  • a cylindrical It is also possible to perform low-frequency ultrasonic irradiation using a vibrator that performs respiratory vibration.
  • Fig. 21 shows a cross-sectional view of the capturing device when the vibrating member and the filter are installed facing each other as shown in Fig. 18.
  • the dimensions shown are just an example, as long as they have no attenuation of ultrasonic waves and can capture particles. Also, the shape is not cylindrical, and it is sufficient that the vibrating member and the filter are installed to face each other and the filter surface is irradiated with ultrasonic waves.
  • Six liquid inlets 31 are provided concentrically between the vibrating member 35 and the filter 29. The reason why there are a plurality of inlets 31 is that, similarly to the case of the separation apparatus, a portion where the flow velocity is locally high is not formed, and the number of inlets or outlets may be further increased.
  • the material of the capture device 30 is made of Ataryl, so that the appearance of the capture can be seen from the outside. However, if there is no need to observe the inside, there is no problem with metal.
  • the ultrasonic vibrator is adhered to the metal plate 35. However, when the pressure loss in the filter 29 is small and the internal pressure of the capturing device is small, the ultrasonic vibrator may be installed so that the vibrator directly contacts the water. Frequency of the ultrasonic vibrator 4 is 4.3 due to the use of MH Z, thickness becomes about 0. 5 mm, when the internal pressure number kg / cm 2 G is applied to the oscillator damaged danger Runode, FIG It is better to adhere to the metal plate 35 like 20.
  • the plate thickness it is necessary to make the plate thickness an integral multiple of a half wavelength so that the ultrasonic waves generated from the ultrasonic transducer can be efficiently transmitted to the liquid side.
  • aluminum was used for the metal plate 35.
  • the sound velocity is 640 mZ s and the half wavelength is about 0.75 mm. In this example, 2.3 mm, which is five times the half wavelength, was used.
  • the metal plate and the The filter 29 is a flat surface, but the concave surface used in the separation device can also be used. However, in this case, the intensity of the ultrasonic wave decreases as the distance from the center axis increases, so it is necessary to use an ultrasonic wave of sufficient intensity so that particles do not adhere to the filter even at a position away from the center.
  • the flow rate of the sample water is set to 0, and the irradiation of the ultrasonic waves is stopped.
  • gas such as air and nitrogen is put into the downstream side of the filter 29 from the air inlet 33 and the pressure is made higher than that of the liquid side, the gas enters the device through the filter 29.
  • the inlet is branched and the concentrated liquid is discharged in order to use the recovery port also as the inlet, but the vibrating member 35 of the ultrasonic capture device 30 and the filter are used.
  • a separate collection port may be provided between 29 and 29. The gas enters from the filter and is taken out from the outlet as if the liquid was pushed out.
  • the capture device 30 Since the concentrate in the ultrasonic capture device 30 is extruded in reverse from the filter 29, particles near the filter 29 are almost completely discharged into the device. Further, the capture device 30 is provided with a nozzle 36 for measuring the internal pressure. Comparing the volume between the vibrating member 35 and the filter 29 and the volume of the portion provided with the outlet 32 downstream of the filter 29, the volume between the vibrating member 35 and the filter 29 is smaller. Is small. This is to prevent the pressure of the liquid passing through the filter from increasing and the pressure of the liquid containing particles between the vibrating member 35 and the filter from increasing unnecessarily.
  • optical sensor described for the separation device can be installed to automatically detect the concentration or presence or absence of the particles captured in the capture device.
  • FIG. 22 is a cross-sectional view of the capturing device in a case where the filter is adhered to the vibration member as shown in FIG. 20 and the filter is directly vibrated.
  • the configuration is almost the same as in Fig. 21, but the wall 42 facing the filter is not strong enough. The material and thickness can be freely adjusted.
  • each capture device can be used according to the difference in particle size. Separated. However, particles smaller than the pore size of the filter should pass through the filter, but if there are many large particles trapped in the device, they will adhere to them and will not be discharged downstream. There are also some.
  • the processing speed must be equal in both devices, but as shown in Fig. 24, a buffer tank is placed between the two devices. If 3 8 is provided, after removing impurities sufficiently in the tank at a slow processing speed in the separation device 3 and sending it to the capture device 30 in the subsequent stage, the same liquid is circulated several times in the separation device 3. It can be said that the impurities are sufficiently removed and sent to the subsequent stage.
  • a plurality of separation devices 3 and capture devices 30 at the previous stage are installed, and a supply pipe that supplies liquid containing particles to multiple separation devices, and a discharge pipe from multiple separation devices 3
  • a supply pipe that supplies liquid containing particles to a plurality of capture devices 30 it is possible to continuously remove impurities and concentrate / capture without using a buffer tank, according to the respective processing speeds.
  • the particles captured and recovered by the device shown in Fig. 24 or Fig. 25 although a considerable amount of impurities are removed by the separation device 3, they have the same size as the target particles Contaminants are also mixed. If the target particles are microorganisms such as Cryptosporium, observe with a microscope. The number and concentration can be measured by mixing a stain solution with the particles discharged from the capture device, selectively staining the target microorganism, and measuring only the fluorescently colored particles with an optical sensor.
  • Figure 26 shows a summary of the form of application as a cryptosporidium inspection device.
  • the operations of concentration, filter dissolution, and centrifugation are replaced with the automatic operations performed by this device.
  • cryptosporidium adheres to the filter paper in the conventional operation, it will not be possible to recover it.
  • sample water containing particles is placed in a tank or container and connected to the device.
  • this device is applied to detection of microorganisms in raw water and purified water, as shown in Fig. 27
  • Fig. 27 By connecting this device directly to rivers, ponds, water purification pipes, etc. that you want to investigate, labor for transporting sample water can be saved.
  • FIG. 28 An example of a purification system for tap water performed by the Waterworks Bureau is shown in Fig. 28.
  • This device can be used instead of sand filtration or chlorination.
  • the filtration and disinfection processes can be replaced with this device.
  • the captured particles and microorganisms can be collected and subjected to detailed inspection.
  • turbidity can be controlled by monitoring the concentration of captured particles and microorganisms.
  • the use of the capture device of the present invention can provide a storage water purification system that can reduce the frequency of filter maintenance and remove microorganisms and particles.
  • Fig. 29A shows a circulating microbial particle removal system, which constantly or periodically introduces the liquid in the stored water from the inlet of the capture device to remove the particles, and discharges the wastewater from the outlet to the water tank. And can be purified by circulation.
  • FIG. 29B when circulation is not required, the capture device of the present invention can be inserted into the water supply pipe to remove microorganisms and particles when water is supplied.
  • drinking water can be taken into a capturing device, and particles in the drinking water can be captured and concentrated, and then supplied as purified drinking water.

Abstract

L'invention concerne un appareil de concentration et de récupération de particules cibles. L'appareil utilise soit un dispositif de concentration dans lequel le filtrage est combiné à un piégeage ultrasonore une fois que les impuretés dans le liquide sont éliminées par un piégeage sans contact réalisé au moyen d'une onde ultrasonore stationnaire, soit un dispositif de traitement de l'eau, dont la fréquence de colmatage du filtre est réduite, particulièrement efficace pour détecter des micro-organismes dans l'eau. L'invention concerne plus particulièrement un dispositif de traitement de l'eau utilisant un filtre pour éliminer des particules présentes dans l'eau, filtre dont la fréquence d'entretien peut être réduite, notamment en ce qui concerne son remplacement et son lavage.
PCT/JP1999/003023 1999-06-07 1999-06-07 Dispositif de traitement d'un echantillon contenant des particules WO2000074814A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1999/003023 WO2000074814A1 (fr) 1999-06-07 1999-06-07 Dispositif de traitement d'un echantillon contenant des particules

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1999/003023 WO2000074814A1 (fr) 1999-06-07 1999-06-07 Dispositif de traitement d'un echantillon contenant des particules

Publications (1)

Publication Number Publication Date
WO2000074814A1 true WO2000074814A1 (fr) 2000-12-14

Family

ID=14235912

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/003023 WO2000074814A1 (fr) 1999-06-07 1999-06-07 Dispositif de traitement d'un echantillon contenant des particules

Country Status (1)

Country Link
WO (1) WO2000074814A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1094036A2 (fr) * 1999-10-19 2001-04-25 Malcolm Robert Snowball Traitement de liquide par filtration et des vibrations
JP2011528980A (ja) * 2008-07-25 2011-12-01 スミス アンド ネフュー ピーエルシー 分離装置用コントローラ
CN109205883A (zh) * 2018-10-08 2019-01-15 冷应杰 一种工业废水处理工艺
US10537831B2 (en) 2004-07-29 2020-01-21 Triad National Security, Llc Ultrasonic analyte concentration and application in flow cytometry
US11287362B2 (en) 2007-12-19 2022-03-29 Triad National Security, Llc Particle analysis in an acoustic cytometer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61220786A (ja) * 1985-03-26 1986-10-01 Agency Of Ind Science & Technol 音波による液体浄化装置
JPH09193055A (ja) * 1996-01-23 1997-07-29 Agency Of Ind Science & Technol 超音波を用いた非接触マイクロマニピュレーション方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61220786A (ja) * 1985-03-26 1986-10-01 Agency Of Ind Science & Technol 音波による液体浄化装置
JPH09193055A (ja) * 1996-01-23 1997-07-29 Agency Of Ind Science & Technol 超音波を用いた非接触マイクロマニピュレーション方法

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1094036A2 (fr) * 1999-10-19 2001-04-25 Malcolm Robert Snowball Traitement de liquide par filtration et des vibrations
EP1094036A3 (fr) * 1999-10-19 2001-12-05 Malcolm Robert Snowball Traitement de liquide par filtration et des vibrations
US10537831B2 (en) 2004-07-29 2020-01-21 Triad National Security, Llc Ultrasonic analyte concentration and application in flow cytometry
US11287362B2 (en) 2007-12-19 2022-03-29 Triad National Security, Llc Particle analysis in an acoustic cytometer
US11287363B2 (en) 2007-12-19 2022-03-29 Triad National Security, Llc Particle analysis in an acoustic cytometer
JP2011528980A (ja) * 2008-07-25 2011-12-01 スミス アンド ネフュー ピーエルシー 分離装置用コントローラ
US8997998B2 (en) 2008-07-25 2015-04-07 Smith & Nephew Plc Controller for an acoustic standing wave generation device in order to prevent clogging of a filter
US9636609B2 (en) 2008-07-25 2017-05-02 Smith & Nephew Plc Controller for an acoustic standing wave generation device in order to prevent clogging of a filter
CN109205883A (zh) * 2018-10-08 2019-01-15 冷应杰 一种工业废水处理工艺
CN109205883B (zh) * 2018-10-08 2021-05-11 潍坊东元连海环保科技有限公司 一种工业废水处理工艺

Similar Documents

Publication Publication Date Title
EP0773055B1 (fr) Appareil pour traiter des particules par rayonnement acoustique
JP4445569B2 (ja) ろ過水監視装置及びろ過水監視システム
JP5054760B2 (ja) オンライン・アナライザ用の限外濾過システム
CN107167416B (zh) 一种分选型流式细胞仪
CN108827752A (zh) 检测装置和方法
JP2013148391A (ja) 浄水用生物粒子計数器、浄水用生物粒子計数方法、及び、浄水監視システム
FR3014330A1 (fr) Procede de controle de l'integrite de membranes de filtration durant leur fonctionnement
WO2000074814A1 (fr) Dispositif de traitement d'un echantillon contenant des particules
US20090299651A1 (en) Filtration testing system
US20100059381A1 (en) Apparatus for measuring the turbidity of water
KR20040043180A (ko) 막 여과 유닛들의 완전성을 체크하는 방법 및 장치
JP2007155458A (ja) ろ過膜破損検出器、膜ろ過装置およびろ過膜破損検出方法
JPH08252440A (ja) 膜破損検出方法及び装置
EP0716869A2 (fr) Séparateur gaz-liquide équipé d'un moniteur de particules
JPH1082723A (ja) 微粒子処理装置
US7229562B2 (en) Integrated dual cross flow filtration and ultrasonic transducer assembly
JP4591702B2 (ja) 膜処理装置及び膜損傷検知方法
KR101530879B1 (ko) 여과막 손상 감시장치 및 그 방법
KR20230074905A (ko) 수질 자동 측정기기를 위한 유기성, 무기성 시료 전처리 장치
JP2003024938A (ja) 膜濾過システム及びその運転方法
JP3922365B2 (ja) 粒子状態検出装置および粒子状態検出方法
EP2607881B1 (fr) Dispositif de concentration
KR102079635B1 (ko) 역세척 효율이 향상되는 섬유여과형 오염 저감 장치
JP3723078B2 (ja) 膜破損検知装置
JP2003161689A (ja) 粒子状態検出用プローブおよび凝集モニタ装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref country code: JP

Ref document number: 2001 501342

Kind code of ref document: A

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase