WO2013155283A1 - Réacteur pour traitement d'eau et son procédé - Google Patents
Réacteur pour traitement d'eau et son procédé Download PDFInfo
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- WO2013155283A1 WO2013155283A1 PCT/US2013/036145 US2013036145W WO2013155283A1 WO 2013155283 A1 WO2013155283 A1 WO 2013155283A1 US 2013036145 W US2013036145 W US 2013036145W WO 2013155283 A1 WO2013155283 A1 WO 2013155283A1
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- WIPO (PCT)
- Prior art keywords
- water
- ozone
- reaction chamber
- reactor
- ultraviolet
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 149
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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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3221—Lamps suspended above a water surface or pipe
-
- 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
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3228—Units having reflectors, e.g. coatings, baffles, plates, mirrors
-
- 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
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/326—Lamp control systems
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Definitions
- the present invention relates generally to the field of water treatment and environmental control. More particularly, the present invention relates to a system and method for decontamination, sterilization and purification of water.
- UV ultraviolet
- US ultrasound
- AOP advanced oxidation process
- the key parameters required for the success of the AOP technology include ozone dosage, UV irradiation level and pH.
- ozone dosage a high dissolved ozone rate must be maintained with effective transfer of ozone gas into the aqueous solution.
- a pressurized injection secondary mix UV/O3 reactor is used. This reactor creates micro bubbles, and provides constant renewal of gas-to-liquid mixing zone and enhanced gas solubility for better utilization of UV irradiation.
- pH increases, ozone is readily converted to hydroxyls, which increases the oxidation rate of contaminants, such as pesticides and cyanides.
- Ozone/UV treatment is able to reduce dye-finishing wastewater by 95%, from 4,000 ADMI units to 200 ADMI units, in an hour. Ozone/UV also shows increased ability to affect mineralization and toxic reduction in some dyes.
- Ozone/UV treatment in this scenario 800 m 3 per day of wastewater would save 30% on treatment costs per month.
- surfactants surface- active compounds
- emulsifiers and detergents Other components of industrial wastewater include surfactants (surface- active compounds), such as emulsifiers and detergents.
- Their processing effectiveness and unique chemical structure make them difficult to treat, often leading to only partial degradation and high residuals in effluent water, which has potential public health and environmental effects.
- the application of ozone and UV for surfactants has proved to be more effective than biological treatments for commonly used compounds, such as anionic surfactants.
- ozone's electrophilic attack decomposes organic compounds, and the hydroxyl radical creates chain reactions that lead to ultimate mineralization.
- Ozone and UV application has also proved to be an effective pre- treatment step combined with biological treatment.
- Phenols are another common component found in wastewater that can be both toxic and hard to break down because of their benzene ring chemical structure.
- Halogenated aromatics which are refractory and difficult to remove with conventional biological treatment, can cause severe pollution problems.
- ozone/UV treatment chlorine or nitrogen elements of the benzene ring can be eliminated relatively quickly, allowing the phenol to be more completely decomposed.
- Ozone and UV combined present an effective solution to water contamination problems.
- their synergistic reactions create optimum oxidizing and disinfection conditions that break down even some of the most durable and problematic wastewater components.
- ozone/UV systems are analogous with the disadvantages of applications based on ultraviolet (UV) water disinfection without ozone.
- a significant restriction is associated with the effects of biofouling and deposition of salt crystals on the surfaces of protective quartz-glass sleeves of UV lamps. The deposition causes interruptions in the operation of disinfecting units and makes it necessary to use special technical equipment to clean the sleeves using chemical and physical methods.
- Another problem is the limitation of exchange process between gas bubbles formed and water. This limitation became especially significant after decreasing reactor dimensions from a reactor used for water treatment by ozone without UV intensification.
- US 5,935,431 discloses ultraviolet ozone water purifier for water disinfection
- US 7, 1 18,852 discloses methods and apparatus for decontaminating protein- containing biological fluids
- US 2010/0219136 discloses fluid treatment using plasma technology
- the present invention provides a system and method for water treatment, decontamination, sterilization and purification. Also provided is a reactor for water treatment that simultaneously combines ozone, ultrasound and ultraviolet purification techniques in a single reaction zone, under natural (or non-vacuum) conditions. While the discussion and drawings depict one ozone inlet, US and UV port, it is understood that more than one can be configured in the reaction chamber. The number of reactant components will depend on the overall size of the reactor chamber and the desired effect of maximizing reaction rates with the synchronized use of these
- the reactor can be scaled to the size desired by the user, and can be constructed of various materials provided the materials are sufficient to maintain the components and withstand pressure, ultrasound vibrations, and the oxidative effects of ozone, as well as the degradation effects of ultraviolet radiation.
- Stainless steel and polymers such as lexan have been found to be beneficial materials for the construction of the reactor.
- Another object of the present invention is to provide a reactor for water treatment that is effective and can be scaled as needed including to the smaller dimensions, and yet maintain an aggressive reaction among components.
- the present inventive system and reactor allow for a smaller size reactor than current conventional water treatment reactors, since greater volumes and rates can pass through the reactor.
- Yet another object of the present invention is to provide a reactor for water treatment that increases the reaction efficiency by bursting the bubbles formed at the surfaces of the reactor and its components.
- Embodiments of the invention provide a system for treating contaminated water.
- the system includes a casing that forms a reaction chamber having an inlet for injecting or infusing ozone gas, and an outlet for removing the treated water, an ultraviolet radiation source, and, an ultrasound vibration source.
- injecting and infusing relative to ozone is used interchangeably and intended to mean an infusion of ozone into the reaction liquid. While it is believed essentially that any shape of reactor would accomplish the invention, the axisymmetrically shaped reactor allows for greater movement and flow of water, and hence is the preferred shape for the present inventive method.
- a mixture of the contaminated water and ozone is injected in the reactor chamber through an inlet nozzle (i.e., injection or infusion system of gas in water).
- Ultraviolet radiations are introduced in the mixture of the contaminated water and ozone by way of an ultraviolet (UV) radiation source. Sound vibrations of ultrasound frequencies are simultaneously introduced in the reaction chamber.
- the contaminated water is treated by virtue of one or more chemical reactions occurring in the reaction chamber.
- the system further includes an outlet nozzle (outlet pipe) for carrying the treated water outside the reaction chamber.
- the present invention provides a method for treating contaminated water using ozone gas, ultraviolet radiation, and ultrasound vibrations in one system or reactor.
- use of the word treatment shall also mean pretreatment of water, wherein pretreatment is considered before the water is passed through a filtration media.
- a mixture of the contaminated water and ozone is injected in a reaction chamber, and is contacted with or exposed to ultraviolet radiation, forming water containing dissolved ozone, and gas bubbles containing the excess or remaining ozone, along with ultrasound vibrations.
- the method includes using a sensor for sensing an intensity of the ultraviolet radiations to maintain correct reaction dynamics, and regulating the dose of introduced ozone and the flow of treated water through the chamber. Dimensions and the motion pattern of bubbles in the reaction chamber can be visually inspected.
- the treated water is withdrawn from the reaction chamber and the flocculated or coagulated colloidal by-products of the reaction are filtered.
- Ultrasound irradiation of UV lamp jacket prevents scale formation on its surface, which causes UV efficiency drop.
- a mirror in the lamp jacket can be installed for reflecting the UV radiation in the direction of the ultrasound transducer in order to make the interaction between the two more effective.
- Fig. 1 illustrates a cross sectional front view of the reactor for water treatment, in accordance with various embodiments of the present invention
- Fig. 2 illustrates a cross sectional side view corresponding to the cross sectional front view of Fig.l, of the reactor for water treatment, in accordance with various embodiments of the present invention
- Fig. 3 illustrates a flowchart, illustrating a method for water treatment, in accordance with an embodiment of the present invention.
- this invention may be employed in residential, municipal, or industrial settings and can be powered by conventional or solar treated sources.
- the present invention utilizes a combination of method steps and system components related to a method for treating water, wherein different types include but are not limited to: potable, drinking, recycled for pools or aquariums, oil field, waste or recycled industrial water. Accordingly, the system components and the method steps have been represented where appropriate by conventional symbols in the drawings, showing only specific details that are pertinent for an understanding of the present invention so as not to obscure the disclosure with details that will be readily apparent to those with ordinary skill in the art having the benefit of the description herein.
- FIGS. 1 and 2 cross sectional front and corresponding cross sectional side views of the reactor for water treatment respectively, are shown.
- Described herein is a system for treating contaminated water comprising: a) an outer housing forming a reaction chamber therein for holding contaminated water;
- UV radiation source for introducing ultraviolet radiation in the mixture of the contaminated water and ozone
- the inventive system further comprises an ultraviolet sensor which is required to be located on the walls of the reactor.
- the sensor can be of a type for sensing an intensity of the ultraviolet radiations that maintain correct reaction dynamics.
- the time of the reaction can vary from seconds to minutes and in some cases even for hours depending on what substance is required to be removed.
- the reaction constants of ozone are different for different materials, but in general, are a few orders of magnitude higher when ozone reacts with UV than without the use of UV radiation.
- the volume of the reaction chamber depends on the flow rate of treated water where treatment by ozone in combination with UV is much faster, because it is believed that OH radicals are produced that work much faster than the ozone (by a few orders of magnitude) thus allowing to make the chamber smaller than conventional chambers, yet obtain similar results.
- the size of the reaction chamber can vary but cannot be too small so that there is enough time (for the given flow rate) for UV to be absorbed by the ozone.
- the reaction chamber can be scaled to a desirous size based on the needs of the user.
- the system can optionally contain a visual inspection window for visually inspecting the one or more reactions occurring in the reaction chamber. Through the visual inspection window, the dimensions and the motion pattern of bubbles in the reaction chamber can be inspected.
- the ultraviolet sensor registers an intensity of the ultraviolet radiations to maintain the correct reaction dynamics, and to regulate the dose of introduced ozone and the flow of treated water through the chamber.
- the size of the bubbles and their number assist in monitoring the effectiveness of UV and the process of absorbing (or sucking-in) the gas.
- it is difficult to quantify or count the number of bubbles therefore no numbers can easily or generally be assigned to this monitoring process.
- An ultraviolet sensor registers the intensity of the ultraviolet radiations to maintain the correct reaction dynamics, for the dose of introduced ozone and the flow of treated water through the chamber.
- the inlet nozzle of the reactor includes a water inlet nozzle, and gas containing ozone inlet nozzle.
- the contaminated water, and ozone introduced in the water are in a quantity or amount sufficient to complete the interaction (or reaction) between the ozone and the UV radiation.
- the amount of ozone employed will vary based on the degree of contamination of the water. The amount of ozone must be sufficient for the direct oxidation reaction and for creation of the dissolved ozone concentration in water for absorption of UV.
- a water treatment reactor 100 or a water treatment system 100 is shown in FIG. 1 and FIG. 2.
- the reactor 100 includes an outer housing 102 in which the water treatment reactions are carried out.
- the outer housing 102 is cylindrical in shape and forms a reaction chamber 104. While the cylinder shape is preferred, any shape allowing for thorough mixing of the water with the reactants, or wherein the contaminated water is exposed to the reactants can be employed.
- the reaction chamber 104 is fitted with a water input nozzle 106 at the bottom in a substantially horizontal direction, through which untreated water enters the reaction chamber 104.
- the reaction chamber 104 may also contain more than one input nozzle 106.
- the water input nozzle 106 is fitted with an ozone input nozzle 108.
- the water input nozzle 106 and the gas containing ozone input nozzle 108 form the inlet nozzle 110.
- Gas containing ozone is drawn by the untreated water forming an emulsion. Part of the ozone is dissolved in water and the remainder is in the bubbles. This generally occurs inside the inlet nozzle 110 before they enter the reaction chamber.
- the configuration of the inlet and outlet nozzles to the reactor is not critical provided they are configured to maximize contact of the reactants with the contaminated water as they enter the reactor.
- the ultrasound transducer 112 is fitted at the bottom of the reaction chamber in a substantially vertical direction as shown in FIG. 1.
- the transducer does not have to be at the bottom of the chamber, and can be located anywhere within the reactor to allow for effective mixing within the solution and exposure/penetration of US to the reactor chamber surfaces.
- the ultrasound transducer 112 generates sound waves or ultrasonic vibrations in the ultrasonic range, above about 18,000 hertz, by converting the electrical energy into sound.
- the ultrasound transducer may be a piezoelectric transducer that generates sound frequencies in the range of about 20kHz to lMhz. Appropriate hydrodynamic, mechanical or magnetostrictive ultrasound transducers may also be used.
- the ultrasound transducer 112 creates an ultrasound field zone that covers the entire volume of the reaction chamber 104, thus enabling an effective reaction and preventing scaling within the surfaces of the chamber.
- the water treatment reactor 100 further includes an ultraviolet (UV) lamp 114, located herein at the top of the outer housing 102.
- the UV lamp 114 is protected by a quartz glass sleeve 116, which surrounds the UV lamp 114. It should be appreciated that any other quartz glass which is transparent for the UV rays of 253.7 nm wavelength may be used for this application. While the UV lamp herein is located at the top of the reactor, it may be located anywhere convenient depending upon the design of the reactor chamber and water flow provided it maximizes penetration into the solution.
- the quartz glass sleeve 116 also includes a reflective mirror 118 for enabling a complete utilization of the ultraviolet rays produced by the UV lamp 114, and an ultraviolet (UV) sensor 120.
- the reflective mirror 118 reflects the UV rays produced by the UV lamp 114, such that the UV rays cover the entire reaction chamber 104.
- the dimensions of the outer housing 102, the ultrasound transducer 112 and the quartz glass sleeve 116 are chosen such that maximum process effectiveness is achieved.
- the time of the reaction can vary from seconds to minutes and in some cases even for hours depending on what substance is required to be removed. It was found that generally the oxidation reaction was complete within about 10 seconds.
- the volume of the reaction chamber 104 depends on the flow rate of treated water where treatment by ozone in combination with UV is much faster because it is believed that OH radicals are produced that work much faster than the ozone (by a few orders of magnitude) thus allowing one to make the chamber smaller.
- the inactivation, destruction and oxidation are maximized by providing a large surface area for the reaction, at the same time, precipitation of the contaminants on the surface of the quartz glass sleeve 116 is minimized.
- the UV lamp 114 generates electromagnetic radiations in the ultraviolet wavelength range of about 250 nm to about 260 nm. More specifically, in an example, the UV lamp 114 generates the electromagnetic radiation of 253.7 nm wavelength.
- the quartz glass sleeve 116 with reflector makes it possible for these radiations to cover the entire volume of the reaction chamber 104.
- UV radiation introducing ultraviolet (UV) radiation in the water containing dissolved ozone
- the inventive method further comprises sensing an intensity of the ultraviolet radiations to maintain correct reaction dynamics, regulating the dose of introduced ozone and the flow of treated water through the chamber, as well as inspection of the dimensions and the motion pattern of bubbles in the reaction chamber 104.
- the method still further includes the contaminated water and ozone introduced in an amount sufficient to drive the reaction to completion.
- the intensity of the UV lamp 114 is varied on a case by case basis and the intensity is selected such that the reaction between the contaminated water and ozone results in virtually all contaminants to be affected by the process.
- the treated water is removed from the reaction chamber 104 via outlets 122. While shown herein, the outlets are located at the top and at the bottom of the reaction chamber 104, their location may be anywhere convenient on the reactor.
- a water outlet pipe 124 of appropriate length may be provided for this purpose.
- a visual inspection window 126 may be provided to facilitate visual inspection of the reaction conditions.
- a UV controller 128 is also provided. The UV sensor 120 senses the intensity of the UV rays and the UV controller 128 allows control of the UV intensity such that optimum water treatment conditions can be maintained in the reaction chamber 104. While a manual UV controller may be employed, it is preferred to utilize an automatic UV controller in the inventive process.
- FIG. 3 is a flowchart 300, illustrating a method for water treatment, in accordance with an embodiment of the present invention. It can be carried out in batch or continuous reaction mode. References will be made to FIGS. 1 and 2 during the description of FIG. 3. At step 302, a mixture of ozone and
- contaminated water is injected in the reaction chamber 104 of the reactor 100, through the inlet nozzle 110.
- predetermined intensity are introduced in the reaction chamber 104 by using the UV lamp 114 and the quartz glass sleeve 116 with reflector.
- ultrasound vibrations are introduced in the reaction chamber by way of the ultrasound transducer 112.
- the water treatment reaction occurs between the contaminated water and ozone in the presence of the UV radiations and ultrasound vibrations, and the water is treated to remove the contaminations.
- the treated water is taken out of the reaction chamber 104.
- the inventive process combines all reactants essentially simultaneously, as opposed to a step-wise system.
- steps 304 and 306 may be carried out simultaneously.
- the steps 302 and 308 are continuous processes, i.e., the mixture of the contaminated water and ozone is introduced continuously to replenish the treated water that is being continuously taken out of the reaction chamber.
- the present method is able to remove organic compounds, chloro organic compounds, biological contaminants etc from water or a fluid of primarily water.
- the time period of the treatment is dependent on the type of contaminants in the water and the degree of contamination. The following examples illustrate the results of the tests carried out by using the reactor and method of the present invention.
- Natural water by natural water it is meant water from natural sources, i.e., springs, rivers, lakes, etc., with no specific impurities but containing the usual organic compounds, salts, etc.; the amount is quantified as "COD" in the table below
- Injected ozone amount was 2 g/hour.
- Treated water flow was 0.5 m 3 /hour.
- UV intensity (without ozone) was more than 60 W/m 2 in all reactor points.
- the custom made reactor employed was of cylindrical shape, made from stainless steel, about 1/10 th of an inch thick, 150mm diameter and 200mm high. There were no ozone, UV or US sensors employed.
- Example 2 In this example, the equipment and conditions of test 1 or example 1 were reproduced except that chlorinated tap water with an admixture of chloro organic compounds was purified by using the reactor of the present invention. Ozone containing gas was injected in an amount of 1 g/hour (gram/hour). Treated water flow was 0.5 m 3 /hour. UV intensity (without ozone) was greater than 60 W/m 2 in all reactor points. Ultrasound radiation at frequency 28 kHz was more than 1 W/cm 2 on the surface of the UV lamp jacket. In the table below, the
- example 1 The reactor and conditions of example 1 were reproduced except as noted.
- biologically contaminated natural water was treated.
- the injected ozone amount was 1 g/hour.
- Treated water flow was 1 m 3 /hour.
- UV intensity (without ozone) was greater than 60 W/m 2 in all reactor points.
- Ultrasound radiation at frequency 28 kHz was more than 1 W/cm 2 on the surface of the UV lamp jacket.
- Table 3 Results of test or Example 3.
- the inventive process generally will not oxidize metals or non-organic contaminants to the point of removing them in solution (or from the contaminated water) at the time of the reaction. However, the process will coagulate these contaminants making it easy to remove the contaminants by ultrafiltration. This occurs without any additional agents or additives to the process, making the ozone-UV-US process advantageous to purification of these heavy contaminants over current traditional methods for their removal.
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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
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US201261622613P | 2012-04-11 | 2012-04-11 | |
US61/622,613 | 2012-04-11 |
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WO2015109353A1 (fr) | 2014-01-21 | 2015-07-30 | Gruber Egon | Dispositif pour la désinfection de l'eau par ozone et par lumière ultraviolette |
AT515339A1 (de) * | 2014-01-21 | 2015-08-15 | Egon Gruber | Vorrichtung zur Desinfektion von Wasser |
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