KR20150122876A - Water treatment apparatus of chlorine-uv combined oxidation for removing algae-caused noxious substance, and variable control method of chlorine dosage and uv dose using the same - Google Patents

Abstract

Disclosed is a water treatment apparatus of chlorine-UV combined oxidation for removing algae-caused noxious substance and a method for variably controlling chlorine dosage and UV intensity using the same. The water treatment apparatus does not use an oxidizing agent such as existing ozone, hydrogen peroxide, etc. by inserting chlorine into a front end of a duct type UV reactor in a predetermined pH condition to remove noxious substances such as algae-caused off-flavor induction substances induced by the occurrence of green algae in a river, algae toxicity substances, medical substances, etc. A follow-up adsorption process such as activated carbon is not needed. In addition, the injection position and injection amount of the chlorine are selectively controlled according to the water quality property of inflow water. An operating convenience is provided by controlling a feedback along with the UV intensity and the chlorine dosage determined by value analysis according to the kind and concentration of the algae-caused noxious substance in the apparatus of chlorine-UV combined oxidation when the algae-caused noxious substance is introduced. Power consumption amounts and medicine usage amounts are reduced. The mis-injection of the medicine can be prevented in advance.

Description

TECHNICAL FIELD [0001] The present invention relates to a chlorine-ultraviolet complex oxidizing water treatment apparatus for removing algae-causing harmful substances, and a chlorine injection amount and a UV intensity control method using the chlorine-ultraviolet complex oxidizing water treatment apparatus and a method of controlling the UV intensity of the same. BACKGROUND ART < RTI ID = 0.0 & CHLORINE DOSAGE AND UV DOSE USING THE SAME}

The present invention relates to a chlorine-ultraviolet complex oxidizing water treatment apparatus, and more particularly, to a chlorine-ultraviolet complex oxidation water treatment apparatus for treating a hobby (taste) (Chlorine-UV) in order to remove toxic substances (Noxious Substance) such as chlorine and ultraviolet rays (Chlorine-UV) And a method for variably selecting and controlling the UV Dose.

In general, algae are photosynthetic organisms, which are lower plants that live in the water, except terrestrial plants, and include a wide variety of taxa. These algae are classified into macro-algae and micro-algae. For example, microalgae include blue-green algae or cyanobacteria, green algae, Flagellate, Diatoms, and the like.

Especially, when the inflow of nutrients into a lake or a lake increases, it becomes eutrophication, and then the algae grow rapidly to form a green tide or an algae bloom. One of the most problematic of these algae is the production of metabolites that cause toxicity and odor, which directly affects the quality of the water they eat and is expected to increase globally due to future climate change. For example, these cyanobacterial species most commonly include Anabaena, Aphanizomenon, Mcrosystis, Oscillatoria, Phormidium, and the like, It causes cyanobacterial toxicity such as cystine, anatoxin-a, Saxitoxin, Cylindrospermopsin and Nodularin.

Specifically, the shape of these cyanobacteria is very diverse, for example, Mcrosystis is spherical, Oscillatoria is a hair-like cell, and Anabaena is an egg It is connected in the form of a necklace. At this time, all of them are connected to each other in order to maintain the shape of algae. In particular, Mcrosystis is a single-celled algae of a single cell, surrounded by a sticky agar It has the nature of bundles. Although these microcystis do not cause a bad smell outside of a little fishy smell, other kinds of cyanobacteria, such as anabena, osilatolia, and formaldehyde, cause geosmin and soil smell that cause mold odor 2-Methylisoborneol (2-MIB), which causes the water quality of the drinking water to drop, resulting in a number of complaints.

Among these toxins of cyanobacteria, microcystins are produced by marsupial cyanobacteria such as Anabena, Oscillatoria, Nostoc, Hapalosiphon, and mating cyanobacteria such as Microcystis. These toxic substances cause serious health problems such as dermatotoxins, cytotoxins, hepatotoxins and neurotoxins. Algae and toxic substances generated in the rivers can be prevented from entering into the water screen due to clogging of the inflow screen, weir contamination, floc settlement interruption, production of bird mat, EOM (Extracellular Organic Matter) , Increased clotting requirements, increased chlorine requirements, increased disinfection byproducts, changes in pH, and release of this taste (flavor) and cyanobacteria.

In addition, 2-MIB, Geosmin, IBMP, IPMP, and TCA are representative hobby materials. Microcystin-LR, Microcystin-RR, Microcystin-YR, Anatoxin-a, Saxitoxin, Cylindrospermopsin and the like. In addition, the target drug substances include Iopromide, Caffeine, Ibuprofen, and the like.

On the other hand, in the conventional process according to the prior art, in the mixed-coagulation process and the precipitation process, the coagulant is added to the coagulation-coagulation process to the colloidal particulate material at a level of several micrometers to form floc, Flocs are removed by gravity settling. In addition, the sand filtration process is a solid-liquid separation process for removing the contaminants in the adhering action to the sand filter media by passing the water through the filtration layer at a high speed (conveying action) after coagulating the contaminated material of the raw water with chemicals, The filtration phase occurs when water passes through the porous layer of soil. That is, the sand filtration process is a phenomenon in which fine flocs adhere to the inner gap surface of a relatively large, uniform particulate filter medium and coagulate.

In this conventional process, the algae-origin can not remove the hobby-inducing substance and the algae toxic substance. Accordingly, it is possible to utilize the advanced oxidation treatment technique using ozone, ozone-hydrogen peroxide, ultraviolet-hydrogen peroxide, ultrasonic waves, And the membrane filtration technique of the nanofiber or more.

For example, in the case of the nanofiltration technology, there is a problem that it is difficult to introduce the nanofiltration technology because it requires an initial investment cost and a high operating cost to treat the harmful substances caused by the algae due to low recovery rate and high power consumption. In addition, ozone treatment and advanced oxidation treatment techniques should be followed by activated carbon treatment to remove residual oxidizing agents and remove residual harmful substances.

)이 19

로 매우 적어서 주입된 과산화수소의 20% 이상이 자외선 접촉 후에도 그대로 방출되고, 이에 따라 해당 잔류 과산화수소를 제거하기 위해서는 활성탄 공정이 필요하다는 단점이 있다.In addition, ozone and ultraviolet light intensity control is maintained by a constant residual ozone concentration control technique or constant ultraviolet intensity rather than depending on the incoming water quality, in the case of ozone-hydrogen peroxide process and ultraviolet-hydrogen peroxide process, The hydrogen peroxide input amount for oxidation may be erroneously injected. Particularly, in ultraviolet-hydrogen peroxide high-level oxidation technology, the amount of ultraviolet light absorbed by hydrogen peroxide (

) 19

, 20% or more of the injected hydrogen peroxide is released as it is after the ultraviolet ray is contacted. Therefore, there is a disadvantage that an activated carbon process is required to remove the residual hydrogen peroxide.

)이

로 매우 높기 때문에 상기 OH 라디칼을 생성시키기 위해 주입한 과산화수소에 의해 다시 OH 라디칼이 소멸되는 단점이 있다.In addition, the OH radicals generated in the ultraviolet-hydrogen peroxide process are reacted with hydrogen peroxide

)this

The OH radicals are extinguished by the hydrogen peroxide injected to generate the OH radicals.

On the other hand, chlorine which can be used instead of hydrogen peroxide has a higher molar absorptivity and quantum yield than hydrogen peroxide, and the reaction rate constant with the OH radical is low, so that when the same ultraviolet energy is irradiated, more OH radicals are generated than hydrogen peroxide The degree of extinction of OH radicals by residual chlorine in the form of hypochlorous acid (HOCl) can be reduced by about 300 times. Hereinafter, for convenience of explanation, chlorine in the form of hypochlorous acid (HOCl) will be collectively referred to as residual chlorine.

In particular, since hypochlorous acid (HOCl) is used as chlorine and chlorine in a water treatment plant, the specially designed hypochlorous acid (HOCl) is not used for disinfection in UV reaction system, It is possible.

Therefore, in order to effectively control harmful substances such as algae-causative substances, algae toxic substances, and medicinal substances, a decision-making system for determining the drug injection rates according to the kind and concentration of the harmful substances needs to be introduced. , There should be no additional processes such as ozone treatment or activated carbon other than conventional conventional processes within a limited site. In addition, it is necessary to improve the usability of conventionally used medicines and to prevent the medicines from being injected even if the medicines are used. Particularly, in the case of using the advanced oxidation technique, a control technique reflecting the water quality of the raw water is needed.

Conventional ozone-hydrogen peroxide and ultraviolet-hydrogen peroxide advanced oxidation water treatment systems use hydrogen peroxide to oxidize harmful substances in water by maximizing OH radicals. However, unreacted residual hydrogen peroxide is generated, and a separate reducing agent is required for removing the residual oxidizing agent such as ozone or hydrogen peroxide. Further, in order to further remove the residual oxidizing agent and harmful substances that are not removed, Is required, which leads to an increase in the amount of chemicals and energy used, thereby increasing the production cost.

Further, in the above-described ozone-hydrogen peroxide and ultraviolet-hydrogen peroxide oxidation techniques, the oxidizing agent is supplied in proportion to the concentration of residual ozone or residual hydrogen peroxide regardless of the kind and concentration of harmful substances in the incoming raw water, It is a fact that I can not.

Korean Patent No. 10-883035 filed on Sep. 10, 2007, entitled " 2-MIB Real-Time Monitoring Device and Method in the Inland Wastewater Treatment Plant " Korean Patent No. 10-1253251 filed on Apr. 14, 2011, entitled " Device and method for monitoring and controlling real-time taste odor inducing substance for water treatment " Korean Patent No. 10-1020943 filed on Mar. 11, 2009, entitled "Taste Odor Control Decision Support System" Korean Patent No. 10-581746 filed on November 10, 2005, entitled "Water Treatment Device" Korean Patent No. 10-367219 filed on Feb. 8, 2000, entitled "Advanced Water Treatment Device for Removing Trace Hazardous Substances"

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a channel-type ultraviolet ray reactor (hereinafter, referred to as " channel ") for removing harmful substances such as tastes, flavorings, A chlorine-ultraviolet complex oxidizing water treatment apparatus for eliminating algae-based harmful substances which does not require a subsequent adsorption step such as activated carbon without using an oxidizing agent such as a conventional ozone or hydrogen peroxide by injecting chlorine into the shear, And to provide a variable control method of the injection amount and ultraviolet intensity.

It is another object of the present invention to provide an apparatus and a method for controlling a chlorine injection position and an injection amount selectively in accordance with the water quality of the influent raw water, It is possible to provide the convenience of operation by feedback control according to the ultraviolet intensity and chlorine injection amount determined by the numerical analysis according to the type and concentration of harmful substances, to reduce the power consumption and the chemical consumption, The present invention provides a chlorine-ultraviolet complex oxidation water treatment apparatus for removing algae-caused harmful substances, and a chlorine injection amount and a method for controlling the intensity of ultraviolet light using the same.

As a means for achieving the above-mentioned technical object, the chlorine-ultraviolet complex oxidation water treatment apparatus for removing harmful substances from algae according to the present invention is characterized in that it comprises at least one member selected from the group consisting of a settling tank, a mixed-agglomerated tank, a settling tank, A water treatment apparatus comprising: a first water quality measurement unit installed on an inflow water channel to measure water quality; A hobby-inducing material inflow determining unit for determining whether the hobby-inducing material has been introduced into the raw water according to the result measured by the first water quality measuring unit; A harmful substance type and concentration input unit for inputting the kind and concentration of a harmful substance caused by algae in the raw water; An operation mode determination unit for selecting a mode for ultraviolet oxidation or a mode for ultraviolet disinfection; A drug injection amount model predictive control unit for variably controlling a chlorine injection amount and an ultraviolet light intensity (irradiation amount) according to the quantity of the influent raw water and the concentration of the harmful substance; A pH adjuster injector for injecting a hydrogen ion exponent (pH) regulator into the raw water according to the water quality measured by the first water quality measuring unit; The apparatus for treating chlorine-ultraviolet rays combined with chlorine-ultraviolet rays to determine whether or not chlorine is to be introduced as an oxidizing agent and to process the chlorine-infused water according to a chlorine injection amount and a UV intensity, which are variably controlled through the chemical- A chlorine-ultraviolet complex oxidation reactor; And a second water quality measuring unit installed on the treated water pipe to measure the treated water quality.

Here, the first water quality measuring unit may be provided with an electronic olfactory apparatus for measuring chlorophyll-a, hydrogen ion exponent (pH) and UV absorbing substance, and the hobby-inducing substance flow- According to the signal pattern, the algae-origin can grasp the inflow characteristics of the hobby-inducing substance.

In the chlorine-ultraviolet composite oxidation apparatus, when the mode for ultraviolet oxidation is selected by the operation mode determination unit, the injection amount is variably controlled by the chemical injection amount model predictive control unit, and the rapid injection- A chlorine introducing unit for introducing chlorine into the reactor; And a tubular ultraviolet reactor provided with variable intensity (irradiation amount) controlled by the drug injection amount model predictive control unit and installed on the inflow source water pipe at the downstream end of the chlorinator and irradiating ultraviolet rays (UV).

In the chlorine-ultraviolet composite oxidation apparatus, the post-chlorine (HOCl) is supplied while maintaining the constant pH condition provided on the inflow source water line between the sand filtration or the membrane filtration and the purified water in the state without the subsequent activated carbon adsorption process .

Here, the chlorine-ultraviolet combined oxidation apparatus is provided with a chlorine-ultraviolet (CO) oxidation reactor without any subsequent activated carbon adsorption process, and is installed on the inflow source water line of the front end of the admixture- .

2-Methylisoborneol (2-Methylisoborneol), which causes soil odor, and gypsum, which causes a mold odor, are contained in the algae-causing harmful substance, Geosmin, and the algal toxicants include Microcystin-LR, Microcystin-RR, Microcystin-YR, Anatoxin-a, ), Saxitoxin, Cylindrospermopsin, and the medicinal substance may include Iopromide, Caffeine, and Ibuprofen.

In another aspect of the present invention, there is provided a chlorine injection amount and a UV intensity variable control method using the chlorine-ultraviolet complex oxidation water treatment apparatus according to the present invention, A method for controlling a chlorine injection amount and an ultraviolet ray intensity in a water treatment apparatus composed of filtration and remediation, comprising the steps of: a) determining whether or not the hobby-inducing substance is inflowed to the influent raw water; b) inputting the kind and concentration of the harmful substance to be removed; c) selecting between a mode for ultraviolet oxidation or a mode for ultraviolet disinfection; d) introducing chlorine to the front end of the tubular ultraviolet reactor when the ultraviolet oxidation mode is selected; e) calculating a target ultraviolet radiation dose and a chlorine injection dose for the target harmful substance; f) calculating and evaluating the removal rate of harmful substances by chlorine-ultraviolet rays; And g) variably controlling the ultraviolet ray irradiation amount and the chlorine injection amount according to the target value / evaluation value, wherein the chlorine injector is equipped with a rapid-injection agitator to introduce chlorine onto the inflow source water line, and the tubular ultraviolet ray reactor And is provided on the inflow source water line at the downstream end of the chlorine introducing unit and irradiates ultraviolet rays (UV).

In the step a), an electronic olfactory apparatus is installed to measure chlorophyll-a, hydrogen ion exponent (pH) and UV absorbing material, and the influent characteristics of the algae- Wherein the amount of chlorine injected and the intensity of ultraviolet light are controlled by a chlorine-ultraviolet complex oxidation water treatment apparatus.

Wherein the step e) comprises the steps of: e-1) determining a reaction rate constant and a molar extinction coefficient of the harmful substance to be removed; e-2) calculating a UV transmittance (UVT); e-3) calculating and inputting a photoreactive radical interference index; e-4) calculating the minimum chlorine concentration in consideration of the chlorine consumption characteristic by the ultraviolet irradiation amount; And e-5) estimating a target ultraviolet irradiation amount and a chlorine injection amount.

If the target value / evaluation value is not greater than 1.0 in step (f), the ultraviolet ray irradiation amount is changed, and if the target value / evaluation value is greater than 1.0, ultraviolet ray irradiation amount and chlorine are calculated to evaluate the disinfection by- do.

In the case where the ultraviolet disinfection mode operation is selected in the step c), the inactivating rate of the microorganism to be removed is input in a state in which no chlorine is inputted to the front end of the ultraviolet ray reactor, and microorganism inactivation by UV and chlorine is calculated , And determines whether the target value / current value is greater than 1.0.

Here, if the target value / current value is not greater than 1.0, the ultraviolet ray irradiation amount can be changed.

According to the present invention, chlorine (HOCl) is injected at the front end of the tubular ultraviolet ray reactor under a constant pH condition in order to remove harmful substances such as algae-originated hobby-inducing substances, alga toxic substances, medicinal substances, , There is no need for a subsequent adsorption step such as activated carbon without using an oxidizing agent such as ozone or hydrogen peroxide.

According to the present invention, it is possible to control the chlorine injection position and the injection amount selectively according to the water quality of the influent raw water and to control the kind of the harmful substances which are algae-originated in the combined oxidation reaction apparatus in which chlorine and ultraviolet rays are combined when harmful substances, And feedback control is performed according to the ultraviolet intensity and chlorine injection amount determined through numerical analysis according to the concentration, so that it is possible to provide the convenience of operation, reduce power consumption and chemical consumption, and prevent chemical misfiring in advance.

According to the present invention, since the chlorine decomposition is divided into the instantaneous chlorine reaction section in the chlorine-ultraviolet complex oxidizing water treatment apparatus and the chlorine decomposition characteristic is considered by the chlorine reaction model which is decreased at the first reaction rate in the disinfected paper, It is possible to quantitatively analyze not only the harmful substances according to the injection amount but also the characteristics of microbial deactivation and disinfection byproducts in real time.

의 농도 변화를 예시하는 도면이다.
도 7은 본 발명의 실시예에서 자외선 강도별 염소 소비특성을 예시하는 도면이다.
도 8은 본 발명의 실시예에 따른 염소-자외선 복합산화 수처리장치를 이용한 염소 주입량과 자외선 강도 가변제어 방법의 동작흐름도이다.
도 9a 내지 도 9c는 각각 본 발명의 실시예에 따른 염소-자외선 복합산화 수처리장치를 이용한 염소 주입량과 자외선 강도 가변제어 방법의 구체적인 동작흐름도이다.
도 10은 본 발명의 실시예에 따른 염소-자외선 복합산화 수처리장치를 적용한 결과로서 유해물질별 제거율을 비교한 것을 나타내는 도면이다.
도 11은 본 발명의 실시예에 따른 염소-자외선 복합산화 수처리장치를 적용한 결과로서 염소 주입량 및 자외선 강도에 따른 이부프로펜(Ibuprofen)의 제거율을 나타내는 도면이다.1 is a connection diagram of a real-time monitoring device for 2-MIB, which is a taste odor inducing substance in a water source flowing into a water treatment system.
FIG. 2 is a block diagram of a real-time taste-odor inducing substance monitoring and controlling apparatus for water treatment
3 is a block diagram of a chlorine-ultraviolet complex oxidation water treatment apparatus for removing algae-causing harmful substances according to an embodiment of the present invention.
FIG. 4 is a specific configuration diagram of a chlorine-ultraviolet complex oxidation water treatment apparatus for removing harmful substances from the algae according to the first embodiment of the present invention.
5 is a specific configuration diagram of a chlorine-ultraviolet complex oxidation water treatment apparatus for removing algae-causing harmful substances according to a second embodiment of the present invention.
FIG. 6 is a graph showing changes in HOCl

As shown in Fig.
Fig. 7 is a diagram illustrating chlorine consumption characteristics by ultraviolet intensity in an embodiment of the present invention. Fig.
FIG. 8 is a flowchart illustrating a chlorine injection amount and a UV intensity variable control method using the chlorine-ultraviolet composite oxidation water treatment apparatus according to an embodiment of the present invention.
9A to 9C are specific operational flowcharts of a chlorine injection amount and a UV intensity variable control method using the chlorine-ultraviolet composite oxidation water treatment apparatus according to an embodiment of the present invention, respectively.
10 is a view showing a comparison of removal rates of harmful substances as a result of applying the chlorine-ultraviolet complex oxidation water treatment apparatus according to the embodiment of the present invention.
FIG. 11 is a graph showing removal rates of ibuprofen according to chlorine injection amount and ultraviolet ray intensity as a result of application of a chlorine-ultraviolet composite oxidation water treatment apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the term "part" or the like, as described in the specification, means a unit for processing at least one function or operation, and may be implemented by hardware, software, or a combination of hardware and software. In the following detailed description, the names of the components are denoted by the first, second, and so on in order to distinguish them from each other in terms of the same names, and are not necessarily limited to those in the following description.

First, the Korean Patent No. 10-883035, which is patented by the applicant of the present invention described above, discloses an invention entitled " Device and method for real-time monitoring of taste odor inducing substance (2-MIB) Korean Patent No. 10-1253251 discloses an invention entitled " A device for monitoring and controlling a real-time taste-odor inducing substance for purifying water and its method ".

Specifically, "a device and a method for real-time monitoring of the taste odor inducing substance (2-MIB) in the source water of the water purification plant" disclosed in Korean Patent No. 10-883035 will be described with reference to FIG.

1 is a connection diagram of a real-time monitoring device for 2-MIB, which is a taste odor inducing substance in a water source flowing into a water treatment system.

1, a real-time monitoring apparatus for 2-MIB, which is a taste odor inducing substance in a water source flowing into a water treatment system, includes a charging and discharging unit 1, a flow meter 3, a chlorine discharging unit 7, , Wherein the monitoring apparatus (10) comprises: a first measuring unit (11) for measuring chlorophyll-a contained in raw water in real time using a fluorescence measurement method; A second measuring unit 13 for measuring the pH of the raw water in real time; An operation unit 15 for calculating a 2-MIB concentration in response to a value measured from the first and second measurement units 11 and 13; A display unit 17 for displaying the calculated 2-MIB concentration; A comparing unit (18) for determining whether the calculated 2-MIB concentration is equal to or greater than a preset reference value; And an alarm unit for generating an alarm when the calculated 2-MIB concentration is equal to or greater than a reference value and outputting a control signal for controlling the powdered activated carbon and chlorine injection timing for treating the taste- (19).

In the case of a real-time monitoring device of 2-MIB, which is a taste-inducing substance in the water source flowing into the above-described water treatment system, the real-time monitoring device and method of 2-MIB, which is a taste odor inducing substance, And it is possible to quantitatively determine whether or not the taste odor is caused by the raw water and the final treated water of the water treatment system when applied in the field.

A "real-time taste-odor inducing substance monitoring and controlling apparatus and method for water treatment" disclosed in Korean Patent No. 10-1253251 will be described with reference to FIG.

FIG. 2 is a block diagram of a real-time taste-odor inducing substance monitoring and controlling apparatus for water treatment

Referring to FIG. 2, a real-time taste-odor-inducing substance monitoring and control device for purifying water is characterized in that a taste odor inducing substance (Geosmin) and 2-MIB (EN) An apparatus for controlling a chemical injection amount of an advanced oxidation treatment process using a radical generation index in real time. The apparatus includes an inlet water storage facility (21), an inflow water pipe (22), a flow meter (23) 24, a high oxidation processing control section 25, a low pressure lamp ultraviolet processing section 26, a vacuum ultraviolet processing section 27, a hydrogen peroxide storage facility 28 and a hydrogen peroxide injection pump 29.

In the case of the above-mentioned real-time control system for the taste-odor-inducing substance for the purification of the water, in the water treatment process for introducing the high-level oxidation process to remove the taste-causing substance, In addition, it is possible to prevent the chemicals from being injected in an excessive amount or a small amount by strengthening the oxidation treatment in the event of an emergency, and furthermore, by using the electronic nose smell sensor and the radical generation index, It is possible to save drug dosing.

Hereinafter, a chlorine-ultraviolet composite oxidation water treatment apparatus for removing algae-causing harmful substances according to an embodiment of the present invention will be described with reference to FIGS. 3 to 7, The chlorine injection amount and the ultraviolet intensity variable control method using the chlorine-ultraviolet complex oxidation water treatment apparatus according to the present invention will be described in detail.

[Chlorine-ultraviolet complex oxidation water treatment apparatus (100)]

3 is a block diagram of a chlorine-ultraviolet complex oxidation water treatment apparatus for removing algae-causing harmful substances according to an embodiment of the present invention.

Referring to FIG. 3, the chlorine-ultraviolet composite oxidation water treatment apparatus 100 for removing algae-based harmful substances according to an embodiment of the present invention includes a settling tank 210, a sedimentation tank 220, A filtration or membrane filtration 230 and a purified water 240. The water quality measuring unit 110 includes a hobby-inducing material inflow determining unit 120, a harmful substance type and concentration input unit 130, A second water quality measurement unit 160, a hydrogen ion index (pH) regulator injection unit 170, and a chlorine-ultraviolet composite oxidation reactor 180. The determination unit 140, the drug injection amount model predictive control unit 150, do.

First, the algae-causing harmful substance includes the hobby-inducing substance, the algae toxic substance and the medicinal substance. The hobby-inducing substance includes 2-Methylisoborneol (2-Methylisoborneol) causing soil odor, and Geosmin (Geosmin), and the algal toxicants include Microcystin-LR, Microcystin-RR, Microcystin-YR, Anatoxin-a, Saxitoxin and Cylindrospermopsin, and the medicinal substance may include Iopromide, Caffeine and Ibuprofen.

The first water quality measurement unit 110 is installed on the inflow water pipe to measure water quality. At this time, the first water quality measurement unit 110 may be provided with an electronic smell device to measure chlorophyll-a, hydrogen ion exponent (pH) and UV absorbing material. For example, the electronic olfactory apparatus may be an electronic nose olfactory sensor, installed in an inflow water pipe for water treatment, and real-time senses a taste-causing substance in the inflow water. Here, the electronic nose smell sensor may be provided with a metal oxide sensor, in which a sample continuously collected from the influent raw water pipe exhibits a specific chemical reaction with a volatile organic compound, and the continuously sampled sample is chlorophyll-a And pH can be measured and analyzed.

The hobby-inducing material inflow determining unit 120 determines whether the hobby-inducing material has been introduced into the raw water according to the measurement result of the first water quality measuring unit 110. At this time, the hobby-inducing material inflow determining unit 120 may determine the inflow characteristics of the hunting-inducing material according to the signal pattern measured by the first water quality measuring unit 110.

The harmful substance type and concentration input unit 130 inputs types and concentrations of harmful substances caused by algae in the raw water.

The operation mode determination unit 140 variably selects the ultraviolet oxidation mode or the ultraviolet disinfection mode according to the raw water quality characteristic.

The drug injection amount model predictive control unit 150 variably controls the chlorine injection amount and ultraviolet ray intensity (irradiation amount) according to the quantity of the influent raw water and the concentration of the harmful substance. That is, the drug injection amount model predictive control unit 150 calculates the ultraviolet intensity and the chlorine injection appropriate amount by a numerical calculation, and variably controls the quantity according to the quantity of the influent water and the concentration of the harmful substance.

The hydrogen ion index (pH) regulator injector 170 injects the hydrogen ion index (pH) regulator into the raw water according to the water quality measured by the first water quality measuring unit 110. For example, the pH adjuster input unit 170 may inject carbon dioxide gas or sulfuric acid into the channel so that the pH of the raw water is maintained at 7.5 or less.

The chlorine-ultraviolet complex oxidation reactor 180 is a device for treating raw water with chlorine-ultraviolet rays coupled thereto. The chlorine-ultraviolet complex oxidation reactor 180 determines whether chlorine is to be introduced as an oxidizing agent and its concentration, The incoming source water is treated according to the variable control amount of chlorine injection and ultraviolet ray intensity.

The second water quality measurement unit 160 is installed on the process water pipe to measure the quality of the treated water. Specifically, the second water quality measuring unit 160 may include a second water quality measuring unit 160 for controlling the ultraviolet ray intensity and the chlorine titration injection amount, for preventing the misapplication of chemicals, securing the chlorine disinfecting ability of purified water, The residual chlorine concentration, the pH, and the UV absorbent are monitored. In other words, the second water quality measurement unit 160 measures the treated water quality such as the residual chlorine concentration of the treated water, the pH, the water temperature and the UV absorbed substance, and determines the inactivation rate of pathogenic microorganisms such as Giardia And the concentration of disinfection by-products can be evaluated to evaluate water quality safety.

Meanwhile, FIG. 4 is a specific configuration diagram of a chlorine-ultraviolet composite oxidation water treatment apparatus for removing algae-causing harmful substances according to the first embodiment of the present invention.

4, in the chlorine-ultraviolet composite oxidation water treatment apparatus for removing algae-causing harmful substances according to the first embodiment of the present invention, the chlorine- A chlorine injector 181 for injecting chlorine on the inflow source water pipe, which is equipped with a rapid injection agitator and is controlled by a variable injection amount by the drug injection amount model predictive control unit 150 when the ultraviolet oxidation mode is selected in the injection unit 140, ; And a tubular ultraviolet reactor 182 for irradiating ultraviolet rays (UV), which is installed on the inflow source water pipe at the downstream end of the chlorine injector 181, and which is controlled variable in intensity (dose) by the drug injection amount model predictive control unit 150, ).

In the chlorine-ultraviolet composite oxidation water treatment apparatus for removing algae-causing harmful substances according to the first embodiment of the present invention, the pH adjuster injection unit is installed in the pretreatment process and the chlorine-ultraviolet complex oxidation reactor is installed in the post- Ultraviolet ray complex oxidation apparatus 180 may be a chlorine-ultraviolet complex oxidation apparatus for treating the sand filtration or the filtration 230 and the settlement paper 240 without the subsequent activated carbon adsorption process. The chlorine (HOCl) is introduced while maintaining the constant pH condition provided on the inflow water channel.

The chlorine-ultraviolet complex oxidation water treatment apparatus for removing algae-based harmful substances according to the first embodiment of the present invention may be applied to a conventional water treatment system composed of a mixing-aggregation process, a precipitation process, a sand filtration process, A low pressure ultraviolet lamp is constituted by a tubular ultraviolet reactor 182 in the downstream of the sand filtration or membrane filtration 230 in a water treatment apparatus comprising a filtration or ultrafiltration separation membrane process and a rapid injection agitator is disposed at the front end of the ultraviolet reactor 182 And the installed chlorine feeder 181 is installed.

Meanwhile, FIG. 5 is a specific configuration diagram of a chlorine-ultraviolet composite oxidation water treatment apparatus for removing algae-causing harmful substances according to a second embodiment of the present invention.

Referring to FIG. 5, in the chlorine-ultraviolet composite oxidation water treatment apparatus for removing algae-caused harmful substances according to the second embodiment of the present invention, a pH adjusting agent input unit is installed in a pretreatment process, and a chlorine- Ultraviolet ray complex oxidation apparatus 180 is a pretreatment concept of a chlorine-ultraviolet complex oxidation water treatment apparatus installed on a raw water pipe, wherein the chlorine- It is installed on the raw water channel and the chlorine (HOCl) is supplied while maintaining the constant pH condition.

The principle and operation of the chlorine-ultraviolet composite oxidation-water treatment apparatus 100 for removing the harmful substances from the algae-based substances according to the embodiment of the present invention having the configurations shown in FIGS. 3 to 5 will be described in detail as follows .

의 분률 상태로 존재하기 때문에, 상기 제1 수질측정 유닛(110)에서 측정한 pH를 통해 HOCl과

의 분률을 정확히 계산하고, 이때, pH를 7.5 이하로 선택적으로 유지하며, 상기 약품 주입량 모델 예측제어 유닛(150)에서 수치연산에 의한 유리염소 주입량에 따라 제어하게 된다.First, when free chlorine applied to the chlorine-ultraviolet complex oxidation water treatment apparatus 100 for removing harmful substances from algae-based substances according to an embodiment of the present invention reacts with ultraviolet rays, a molar extinction coefficient higher than that of conventional hydrogen peroxide, (OH) radicals, the rate of extinction of OH radicals by residual chlorine (HOCl) is very low, while generating more OH radicals than hydrogen peroxide when irradiated with the same ultraviolet energy. However, this free chlorine is not only present as chlorine but also depends on the pH of the free chlorine,

The HOCl and HOCl are measured through the pH measured by the first water quality measuring unit 110,

And the pH is selectively maintained at 7.5 or less at this time, and the drug injection amount model predictive control unit 150 controls the amount of free chlorine by the numerical calculation.

로 존재하게 되는데, 이러한

의 경우, 몰흡광계수는 과산화수소에 비해 2.5배 더 크지만, 양자수득률이 적어 라디칼 생성률이 과산화수소에 비해 낮을 뿐만 아니라 생성된 OH 라디칼과 반응해 소멸시키는 속도도 빠르기 때문에 과산화수소와 비교해 효율적인 라디칼 생성을 할 수 없게 된다.In addition, under the condition of pH 7.5 or higher,

As shown in FIG.

, The molar extinction coefficient is 2.5 times larger than that of hydrogen peroxide. However, since the rate of radical generation is lower than that of hydrogen peroxide due to the lower quantum yield, the rate of radical elimination by reacting with the generated OH radical is also faster. Can not.

Therefore, in the ultraviolet-free chlorine process according to the embodiment of the present invention, the efficiency of the chlorine-ultraviolet complex oxidation water treatment apparatus 100 for removing a target substance under the condition of pH 7.5 or higher may be lowered, The pH is maintained at 7.5 or less, or the ultraviolet ray intensity is adjusted in the drug injection amount model predictive control unit 150 so that harmful substances are treated even at the raw water quality of pH 7.5 or higher.

In order to secure the disinfecting ability of the downstream end, the free chlorine injection amount is set such that the raw water temperature, the residual chlorine concentration, the pH, the UV, and the like are measured in the second water quality measurement unit 160 of the chlorine-ultraviolet complex oxidation water treatment apparatus 100 according to the embodiment of the present invention. By monitoring the absorbent material, a proper chlorine injection amount below the disinfectant by-product is calculated in the drug injection amount model predictive control unit 150 so as to secure a certain level of disinfecting ability.

Since a considerable decrease in chlorine occurs in the tubular ultraviolet reactor 182 depending on the ultraviolet intensity and the characteristics of the inflow water quality, the chlorine injection amount considering the chlorine decomposition characteristic is calculated and controlled in the drug injection amount model predictive control unit 150 do. At this time, the chlorine decomposition characteristic can be divided into a reaction zone of a chlorine-ultraviolet complex oxidation reactor 180 and a reaction zone of a disinfection reaction zone according to a subsequent process. In the chlorine-ultraviolet complex oxidation water treatment apparatus The amount of chlorine injection can be calculated in the chemical injection quantity model predictive control unit 150 through a chlorine reaction model in which the chlorine decomposition is divided into the instantaneous chlorine reaction zone in the reaction chamber 100 and the first reaction rate is reduced in the disinfection zone.

The ultraviolet intensity was measured by a model in which the secondary reaction rate of harmful substances and OH radicals, the molar extinction coefficient of each harmful substance, the photodecomposition yield, and the concentration of OH radical inhibitors such as UV absorber and alkalinity were considered, And can be calculated and controlled variably.

3, a chlorine-ultraviolet composite oxidation water treatment apparatus of high efficiency and a method of treating the same are provided, in which the kind and concentration of harmful substances in the influent raw water, the disinfection ability of purified water, And a method of variably controlling the ultraviolet intensity and the chlorine injection amount according to the characteristics. That is, the chlorine-ultraviolet complex oxidation water treatment apparatus 100 according to the embodiment of the present invention can be applied to a 2-MIB and a geosmin, , And the like, and a chlorine-ultraviolet ray to sequentially treat medicinal substances such as algae toxic substances, caffeine, and ibuprofen, as shown in FIG. 1 and the like. In the water treatment apparatus, ultraviolet ray intensity and chlorine injection amount are varied And a method for selecting and controlling the same.

In this case, 2-MIB, Geosmin, IBMP, IPMP and TCA are representative hobby materials. Microcystin-LR, Microcystin-RR, Microcystin-YR, Anatoxin-a, Saxitoxin, Cylindrospermopsin and the like. In addition, the target drug substances include Iopromide, Caffeine, Ibuprofen, and the like.

Compared with conventional oxidation techniques such as ozone treatment, ozone-hydrogen peroxide treatment, ultraviolet-hydrogen peroxide treatment, etc., the chlorine-ultraviolet complex oxidation water treatment apparatus 100 according to the embodiment of the present invention is characterized in that, The process is not necessary and chlorine disinfectant is used as oxidizer. Specifically, chlorine has a higher molar absorptivity and a higher quantum yield than hydrogen peroxide, but also has a lower rate constant reaction with OH radicals. For example, when irradiated with the same ultraviolet energy, chlorine generates more OH radicals than hydrogen peroxide (OH) radicals due to residual chlorine (HOCl) is very low. Therefore, the water treatment apparatus can be operated at a power consumption lower than hydrogen peroxide according to the water quality of the raw water. Further, in the case of residual residual chlorine, an additional disinfectant for microbial inactivation can be utilized as a continuous reaction, and further chlorine consumption can be saved since additional microbial deactivation is performed in ultraviolet light.

)이 19

로 매우 적기 때문에 주입된 과산화수소의 30% 이상이 자외선 접촉 후에도 미반응 물질로 방출될 수 있고, 해당 잔류 과산화수소를 제거하기 위해서는 활성탄 공정 등의 후속 공정이 필요한 단점이 있다. 또한, 자외선-과산화수소 공정에서 생성된 OH 라디칼은 과산화수소와의 반응성(

)이

로 매우 높기 때문에 상기 OH 라디칼을 생성시키려고 주입한 과산화수소에 의해 다시 OH 라디칼이 소멸되는 단점이 있다.Specifically, in the case of a conventional ultraviolet-hydrogen peroxide process, the amount of ultraviolet light absorbed by hydrogen peroxide

) 19

, More than 30% of the injected hydrogen peroxide can be released as unreacted material even after the ultraviolet ray is contacted, and a subsequent process such as an activated carbon process is required to remove the residual hydrogen peroxide. In addition, the OH radicals generated in the ultraviolet-hydrogen peroxide process are reacted with hydrogen peroxide

)this

The OH radicals disappear again due to the hydrogen peroxide injected to generate the OH radicals.

On the other hand, the chlorine-ultraviolet complex oxidation water treatment apparatus 100 according to the embodiment of the present invention generates OH radicals by the chemical reactions represented by the following equations (1) to (3).

의 자외선 에너지 흡수율은 기존의 과산화수소보다 약 2.5∼3.0배 높기 때문에 몰흡광계수 및 양자수득률이 높게 되고, 많은 OH 라디칼을 발생시킬 수 있다. 이에 따라, 본 발명의 실시예에 따른 염소-자외선 복합산화 수처리장치(100)는 조류-기인 맛냄새물질과 조류 독성물질을 제거할 수 있다.At this time, the HOCl and

The ultraviolet energy absorption rate of hydrogen peroxide is about 2.5 to 3.0 times higher than that of hydrogen peroxide, so that the molar absorptivity and the quantum yield are high and many OH radicals can be generated. Accordingly, the chlorine-ultraviolet complex oxidation water treatment apparatus 100 according to the embodiment of the present invention can remove algae-based taste odor substances and algae toxic substances.

로 분해되는 화학종에서 HOCl과

이 반응에 관여하는 농도를 측정하기 위하여 다음의 수학식 5를 이용하여 계산할 수 있다.In the embodiment of the present invention, the first water quality measuring unit 110 is a water quality monitoring unit constituted of raw water of chlorophyll-a, pH, UV absorbing substance, and electronic smell apparatus. The chlorophyll- The UV absorbing material is used to evaluate the harmful substance removal rate of the chlorine-ultraviolet composite oxidizing water treatment apparatus 100 according to the embodiment of the present invention, or to calculate a reaction model (hereinafter referred to as " 7) to calculate the UV transmittance in real time as an OH radical generation inhibiting factor, using the following equation (4)

In HOCl < RTI ID = 0.0 >

In order to measure the concentration involved in this reaction, the following equation (5) can be used.

, Where Absorbance represents the UV absorbance value (254 nm wavelength).

, Where Chlorine represents the Chlorine concentration (M) and pKa represents the dissociation constant, where pKa = 7.5.

의 분률 상태로 존재하는데, pH 7.5 이상의 조건에서 유리염소는

로 존재하게 되는데,

의 경우, 몰흡광계수는 과산화수소에 비해 2.5배 더 크지만, 양자수득률이 적어 라디칼 생성률이 과산화수소에 비해 낮기 때문에 HOCl과

의 분률은 전술한 수학식 5를 이용하여 계산해야 하고, 실제 반응에 관여한 염소 농도를 계산하여 조류-기인 유해물질의 처리능을 계산한다.This is because not only the free chlorine is present as HOCl but also the free chlorine,

, And free chlorine at pH 7.5 and above

As a result,

, The molar extinction coefficient is 2.5 times larger than that of hydrogen peroxide, but since the rate of radical formation is lower than that of hydrogen peroxide due to the lower quantum yield,

Is calculated using Equation (5), and the chlorine concentration involved in the actual reaction is calculated to calculate the ability to treat the algae-causing harmful substances.

In the chlorine-ultraviolet complex oxidation water treatment apparatus 100, the alkalinity of the raw water, the concentration and the structural characteristic of the dissolved organic matter, etc. are quantified by quantifying the factor that interferes with the generation of OH radical, that is, the characterization index in the raw water. In this case, the chemical substance to be used is Rhodamin B substance, which is as described in Patent KR10-883035 registered by the applicant of the present invention.

Also, when the influent water pH is increased to 8 or more, the pH can be controlled by using carbon dioxide gas or sulfuric acid on the inflow channel of the agglomeration-agglomeration process as shown in FIG. 4 and FIG. As an embodiment of the present invention, determination of the influx of 2-MIB and Geosmin, which are the hobby-inducing substances, is described in the patent applications KR10-883035 and KR10-1253251 registered by the applicant of the present invention.

Here, if the concentration of the hobby-inducing substance is 10 ng / L or more and the direct smell by the electronic olfactory apparatus is monitored by the statistical model of the chlorophyll-a and the pH change value, The intensity is switched to the oxidation operation mode, and chlorine is introduced onto the inflow channel of the tubular ultraviolet reactor 182. If the hobby-inducing substance is not introduced, the ultraviolet intensity (irradiation amount) is adjusted to a level for disinfection, and chlorine is not injected onto the inflow channel of the tubular ultraviolet reactor 182. In addition, other avian toxic substances and medicinal substances can be directly analyzed by the driver and the type and concentration can be inputted. As described above, ultraviolet rays can be selectively operated in a mode for ultraviolet oxidation and a mode for ultraviolet disinfection, and chlorine is introduced when the mode is switched to the ultraviolet oxidation mode.

의 농도 변화를 예시하는 도면이다.Meanwhile, FIG. 6 is a graph showing the relationship between HOCl

As shown in Fig.

In the embodiment of the present invention, in the medicine injection amount model predictive control unit 150 for calculating the ultraviolet light intensity and the chlorine injection amount in accordance with the kind and concentration of the algae-derived hobby-inducing substance, algae toxic substance, As shown, the minimum chlorine concentration reduced by ultraviolet intensity is considered. At this time, the experimental model equation for the chlorine consumption characteristic according to the ultraviolet ray intensity can be given by the following Equation (6).

은 염소 제거율을 나타내고,

는 자외선 강도(조사량)를 나타낸다.here,

Represents the chlorine removal rate,

Indicates the ultraviolet intensity (irradiation amount).

In the embodiment of the present invention, in order to variably control the ultraviolet irradiation amount and the chlorine injection amount in the chlorine-ultraviolet ray complex oxidation process depending on the kinds of harmful substances in the raw water, the ultraviolet irradiation amount and the chlorine injection amount are calculated using the following equations (7) and And controls it.

Specifically, when the driver determines the amount of chlorine injection required to satisfy the target removal rate according to the type and concentration of the harmful substances input by the hobby-inducing material inflow determining unit 120 and input from the concentration input unit 130, 7, and the ultraviolet intensity is calculated and controlled using the following equation (8).

At this time, the water quality characteristic factor of the target raw water is input as a factor (radical consumption factor, ultraviolet absorbance, pH) measured by the first water quality measurement unit 110, and when the type of the contaminant to be removed is determined, The secondary reaction rate constant with the OH radical, the molar extinction coefficient, and the quantum yield are automatically inputted in the step (1) and the ultraviolet irradiation amount and the chlorine injection amount can be calculated. Equation (7) and Equation (8) can be given as follows.

는 염소 주입량(단위는 mg/L),

는 자외선 조사량(단위는

),

는 removal of target compound(단위는 %),

는 UV 흡수물질(파장 254nm),

는 UV 투과율,

은 몰흡광계수(단위는

),

은 광분해수율(단위는 mol/einstein),

는 제거 대상물질의 이차분해속도 상수(단위는

),

는 상기 제1 수질측정 유닛(110)에서 측정한 pH, 및

는 OH 라디칼 방해지수(단위는 sec^-1)를 각각 나타낸다.here,

Is the chlorine dose (unit: mg / L),

Is the ultraviolet dose

),

Removal of target compound (%),

(Wavelength 254 nm), a UV absorbing material

UV transmittance,

Is the molar extinction coefficient

),

(Unit: mol / einstein),

Is the rate constant of secondary decomposition of the substance to be removed

),

Is the pH measured by the first water quality measurement unit (110), and

Represents the OH radical scavenging index (unit: sec ^-1 ), respectively.

는 자외선 조사량(단위는

),

는 염소 주입량(단위는 mg/L),

는 removal of target compound(단위는 %),

는 UV 흡수물질(파장 254nm),

는 UV 투과율,

은 몰흡광계수(단위는

),

은 광분해수율(단위는 mol/einstein),

는 제거 대상물질의 이차분해속도 상수(단위는

),

는 상기 제1 수질측정 유닛(110)에서 측정한 pH, 및

는 OH 라디칼 방해지수(단위는 sec^-1)를 각각 나타낸다.here,

Is the ultraviolet dose

),

Is the chlorine dose (unit: mg / L),

Removal of target compound (%),

(Wavelength 254 nm), a UV absorbing material

UV transmittance,

Is the molar extinction coefficient

),

(Unit: mol / einstein),

Is the rate constant of secondary decomposition of the substance to be removed

),

Is the pH measured by the first water quality measurement unit (110), and

Represents the OH radical scavenging index (unit: sec ^-1 ), respectively.

7 is a diagram illustrating chlorine consumption characteristics according to ultraviolet light intensity in an embodiment of the present invention.

In the chlorine-ultraviolet complex oxidation water treatment apparatus 100 according to the embodiment of the present invention, the chlorine injection amount is calculated by the following equation (9) so that the chlorine injection amount is injected at the minimum concentration or more, The pH, the temperature and the UV absorbing substance value of the treated water of the chlorine-ultraviolet complex oxidizing water treatment apparatus 100 according to the embodiment of the present invention are measured to measure the second water quality measuring unit 160, It is determined whether the chlorine injection amount based on the disinfection byproduct is proper so as to be controlled to a chlorine injection amount that does not exceed 80 [micro] g / L, which is the maximum possible concentration in the cleaning solution 240. Equation (9) can be given as follows.

)를 나타내며,

는 염소주입농도를 나타내며, t는 정수지 접촉 시간(단위는 시간)을 나타내고, T는 수온(단위는 ℃)을 나타낸다.Here, TTHM represents the concentration of THMs (unit: 占 퐂 / L), UV represents UV254 absorbance

),

Represents the chlorine injection concentration, t represents the contact time (unit is time) of the integral paper, and T represents the water temperature (unit: 占 폚).

As a result, according to the embodiment of the present invention, in order to remove harmful substances such as tidal substances, tidal toxic substances, medicinal substances and the like caused by the occurrence of the river green tide, chlorine is added to the front end of the channel- The subsequent adsorption step such as activated carbon is not required without using an oxidizing agent such as the conventional ozone or hydrogen peroxide.

[Chlorine injection amount and ultraviolet intensity variable control method]

FIG. 8 is a flowchart illustrating a chlorine injection amount and a UV intensity variable control method using the chlorine-ultraviolet composite oxidation water treatment apparatus according to an embodiment of the present invention.

Referring to FIGS. 3 to 5 and 8, the chlorine injection amount and the ultraviolet intensity variable control method using the chlorine-ultraviolet composite oxidation water treatment apparatus according to the embodiment of the present invention are as follows. First, The substance inflow is measured and determined (S110). At this time, an electronic olfactory apparatus is installed to measure chlorophyll-a, hydrogen ion exponent (pH), and UV absorbing material, and the influx characteristic of the tidal-inducing material can be grasped according to the measured signal pattern.

Next, the types and concentrations of the harmful substances to be removed are input (S120).

Next, either the ultraviolet oxidation mode or the ultraviolet disinfection mode is selected (S130).

Next, in the ultraviolet oxidation mode, chlorine is introduced into the front end of the UV reactor (S140). At this time, the chlorine injector 181 is equipped with a rapid-injection agitator to inject chlorine on the inflow source water line, and the tubular ultraviolet ray reactor 182 is installed on the inflow source water line at the downstream end of the chlorine injector 181, ).

Next, the target ultraviolet ray irradiation amount and chlorine injection amount for the target harmful substance are calculated (S150).

Next, the harmful substance removal rate of chlorine-ultraviolet rays is calculated and evaluated (S160).

Next, the ultraviolet irradiation amount and the chlorine injection amount are variably controlled in accordance with the target value / evaluation value (S170).

9A to 9C are specific operational flowcharts of a chlorine injection amount and a UV intensity variable control method using the chlorine-ultraviolet composite oxidation water treatment apparatus according to an embodiment of the present invention, A decision tree for determining the operation mode in which the process, the ultraviolet ray intensity, and the free chlorine injection amount are variably controlled in accordance with the kind and concentration of the harmful substances which are algae of the influent water quality.

9A to 9C, the chlorine injection amount and the ultraviolet intensity variable control method using the chlorine-ultraviolet complex oxidation water treatment apparatus according to the embodiment of the present invention are as follows. First, target raw water is collected (S201) The ingestion of this hobby-inducing substance is measured and determined using a smell device (S202).

Next, the types and concentrations of the harmful substances to be removed are inputted (S203).

Next, the operation mode is selected from the ultraviolet oxidation mode or the ultraviolet disinfection mode (S204).

Next, in the case of the mode operation for ultraviolet oxidation, chlorine is introduced into the front end of the ultraviolet ray reactor (S205).

Next, the reaction rate constant and the molar extinction coefficient of the harmful substance to be removed are determined (S206). Next, the UV transmittance (UVT) is calculated (S207) with reference to the above-mentioned formula (4) Referring to Equation (5), the photoreactive radical interference index is calculated and input (S208).

Next, referring to Equation (6), the minimum chlorine concentration is calculated in consideration of chlorine consumption characteristics for each ultraviolet irradiation amount (S209). Next, referring to Equation (7), the target ultraviolet ray irradiation amount and chlorine injection amount (S210).

Next, the harmful substance removal rate of chlorine-ultraviolet rays is calculated and evaluated (S211).

Next, whether the target value / evaluation value is greater than 1.0 is compared (S212). Next, if the target value / evaluation value is not larger than 1.0, the ultraviolet ray irradiation amount is changed (S213).

Next, the ultraviolet ray irradiation amount and chlorine are calculated (S214), and then the disinfection by-products are evaluated (S215).

If the operation mode selected in step S204 is the ultraviolet disinfection mode operation, operation is performed in the ultraviolet disinfection mode without introducing chlorine in the front end of the ultraviolet ray reactor (S216).

Next, microbial inactivation by ultraviolet rays is calculated (S218), and further microorganism inactivation by chlorine is calculated (S219).

Next, it is determined whether the target value / current value is greater than 1.0 (S220). Next, if the target value / current value is not greater than 1.0, the ultraviolet dose is changed (S221).

FIG. 10 is a graph showing a comparison of removal rates of harmful substances as a result of application of the chlorine-ultraviolet composite oxidation water treatment apparatus according to the embodiment of the present invention. In the case of ultraviolet alone treatment, ultraviolet-hydrogen peroxide, etc., We compared the treatment efficiencies of the substances to be removed such as Geosmin, Microcystin-LR (representative algae toxic substance), Ibuprofen and Iopromide (representative drugs) .

As shown in FIG. 10, in the chlorine-ultraviolet composite oxidizing water treatment apparatus according to the embodiment of the present invention and the conventional ultraviolet alone or ultraviolet-hydrogen peroxide water treatment apparatus, the tastes (taste odor) The treatment efficiency was compared. The present invention relates to a chlorine-ultraviolet composite oxidizing water treatment apparatus and a method of treating the same, wherein the algae-induced hobby-inducing substance Geosmin and a representative alga toxic substance When injecting 2 mg / L of hydrogen peroxide and chlorine at a constant ultraviolet light intensity for the substances to be removed such as cystine-LR (ibuprofen) and iopromide (iopromide), representative drugs, Were compared. As can be seen from the above results, it was confirmed that the same efficiency of removal efficiency was secured in the chlorine-ultraviolet complex oxidation water treatment apparatus.

FIG. 11 is a graph showing removal rates of ibuprofen according to chlorine injection amount and ultraviolet intensity as a result of application of a chlorine-ultraviolet complex oxidation water treatment apparatus according to an embodiment of the present invention. As shown in FIG. 11, ibuprofen ) Showing the removal efficiency according to the change of the chlorine injection amount.

As shown in FIG. 11, the removal experiment using Ibuprofen (IBF), which is a representative drug substance in the chlorine-ultraviolet complex oxidizing water treatment apparatus, and which is frequently detected in the domestic water system, was evaluated. At this time, the ultraviolet lamp used in the experiment was a low-pressure 254 nm single wavelength lamp. Test conditions were 1 μM of IBF in distilled water and 0, 2 and 5 mg / L of free chlorine. It was confirmed that the removal efficiency can be rapidly increased even if only a small amount of 2 mg / L oxidant is injected in the chlorine-ultraviolet complex oxidation water treatment apparatus according to the embodiment of the present invention.

As a result, according to the embodiment of the present invention, it is possible to selectively control the chlorine injection position and the injection amount according to the water quality of the influent raw water, and to control the amount of chlorine- It is possible to provide the convenience of operation by controlling the feedback according to the intensity of ultraviolet rays and the amount of chlorine injected determined by the numerical analysis according to the type and concentration of the harmful substances, to reduce power consumption and chemicals usage, and to prevent chemical misfiring in advance. Further, according to the embodiment of the present invention, the chlorine decomposition is divided into the instantaneous chlorine reaction section in the chlorine-ultraviolet complex oxidizing water treatment apparatus and the chlorine reaction model in which the chlorine decomposition characteristic is considered Because of the injection method, it is possible to quantitatively analyze in real time the characteristics of microbial deactivation and disinfection byproducts as well as harmful substances according to the amount of chlorine injection.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Chlorine-ultraviolet complex oxidation water treatment device
110: first water quality measuring unit
120: This hobby-inducing substance inflow determination unit
130: Hazardous substance type and concentration input unit
140: Operation mode determining section
150: drug injection amount model predictive control unit
160: second water quality measuring unit
170: Hydrogen ion index (pH)
180: Chlorine-ultraviolet composite oxidation reactor
181: Chlorine dispenser
182: Duct type ultraviolet ray reactor
190: coagulant injection unit
210: Admixture - Agglomeration
220: Settling basin
230: sand filtration or membrane filtration
240: Fixed spot

Claims (10)

The water treatment apparatus according to the present invention comprises a settling tank, a mixing tank 210, a settling tank 220, a sand filtration or membrane filtration tank 230, and a settlement sheet 240,
A first water quality measurement unit 110 installed on the inflow water channel to measure water quality;
The hobby-inducing material inflow determining unit 120 determines whether the hobby-inducing material has been introduced into the raw water according to the result of the measurement by the first water quality measuring unit 110.
A harmful substance type and concentration input unit 130 for inputting the kind and concentration of harmful substances caused by algae in the raw water;
An operation mode determination unit (140) for selecting a mode for ultraviolet oxidation or a mode for ultraviolet disinfection;
A drug injection amount model predictive control unit (150) for variably controlling a chlorine injection amount and an ultraviolet ray intensity (irradiation amount) according to the quantity of the influent raw water and the concentration of the harmful substance;
A hydrogen ion index (pH) regulator injector 170 for injecting a hydrogen ion exponent (pH) regulator into the raw water according to the water quality measured by the first water quality measuring unit 110;
A device for treating chlorine-ultraviolet rays to treat inflow water, comprising: determining whether or not chlorine is to be introduced as an oxidizing agent and determining a concentration of the chlorine-ultraviolet ray based on a chlorine injection quantity and a UV intensity, which are variably controlled through the chemical- A chlorine-ultraviolet composite oxidation apparatus 180 for treating raw water; And
A second water quality measuring unit 160 installed on the treated water pipe for measuring the treated water quality,
Ultraviolet ray complex oxidation water treatment apparatus for removing algae-derived harmful substances, The method according to claim 1,
The first water quality measuring unit 110 is provided with an electronic olfactory apparatus for measuring chlorophyll-a, hydrogen ion exponent (pH) and UV absorbing substance, Wherein the algae-origin ascertains the inflow characteristics of the hobby-inducing material according to the signal pattern measured by the measuring unit (110). The chlorine-ultraviolet composite oxidation apparatus (180) according to claim 1, wherein the chlorine-
When the mode for ultraviolet oxidation is selected by the operation mode determination unit 140, the injection amount is variably controlled by the drug injection amount model predictive control unit 150, and a chlorine An injector 181; And
A tubular ultraviolet reactor 182 for controlling intensity (irradiation amount) by the drug injection amount model predictive control unit 150 and installed on the inflow source water pipe at the downstream end of the chlorinator 181 to emit ultraviolet (UV)
Ultraviolet ray complex oxidation water treatment apparatus for removing algae-derived harmful substances, The method of claim 3,
The chlorine-ultraviolet complex oxidation reactor 180 is maintained at a constant pH condition provided on the inflow source water line between the sand filtration or the membrane filtration 230 and the purified water 240 without the subsequent activated carbon adsorption process After adding chlorine (HOCl)
The chlorine-ultraviolet composite oxidation apparatus 180 is installed on the inflow source pipe at the upstream side of the agglomerate-agglomerate 210 in a state where the subsequent activated carbon adsorption process is not carried out, and the chlorine- Ultraviolet ray complex oxidation water treatment apparatus for removing harmful substances from algae. The method according to claim 1,
2-Methylisoborneol (2-Methylisoborneol), which causes soil odor, and Geosmin (2-Methylisoborneol), which causes mold odor, are contained in the algae- Geosmin), and the avirulent toxic substances include Microcystin-LR, Microcystin-RR, Microcystin-YR, Anatoxin-a, Characterized in that the medicinal substance comprises at least one selected from the group consisting of Iopromide, Caffeine and Ibuprofen, wherein the medicinal substance is selected from the group consisting of Saxitoxin, Cylindrospermopsin, Ultraviolet ray complex oxidation water treatment apparatus for removing ultraviolet rays. A method for controlling the amount of chlorine injection and the intensity of ultraviolet light in a water treatment apparatus comprising a settling tank, a mixing tank (210), a settling tank (220), sand filtration or membrane filtration (230)
a) measuring the presence or absence of the introduction of the hobby-inducing substance into the influent water;
b) inputting the kind and concentration of the harmful substance to be removed;
c) selecting between a mode for ultraviolet oxidation or a mode for ultraviolet disinfection;
d) introducing chlorine to the front end of the tubular ultraviolet reactor when the ultraviolet oxidation mode is selected;
e) calculating a target ultraviolet radiation dose and a chlorine injection dose for the target harmful substance;
f) calculating and evaluating the removal rate of harmful substances by chlorine-ultraviolet rays; And
g) variably controlling the ultraviolet irradiation amount and the chlorine injection amount according to the target value / evaluation value,
The chlorine injector 181 is equipped with a rapid injection agitator for introducing chlorine onto the inflow source water line, and the tubular ultraviolet reactor 182 is installed on the inflow source water line at the downstream end of the chlorine injector 181, The method of controlling variable amount of chlorine and intensity of ultraviolet light using the chlorine-ultraviolet complex oxidation water treatment apparatus. The method according to claim 6,
In the step (a), an electronic olfactory apparatus is installed to measure chlorophyll-a, hydrogen ion exponent (pH) and UV absorbing material, and the influent characteristic of the tidal- A method for controlling the amount of chlorine and controlling the intensity of ultraviolet light using a chlorine - ultraviolet complex oxidation water treatment apparatus. 7. The method of claim 6, wherein step (e)
e-1) determining a reaction rate constant and a molar extinction coefficient of the harmful substance to be removed;
e-2) calculating a UV transmittance (UVT);
e-3) calculating and inputting a photoreactive radical interference index;
e-4) calculating the minimum chlorine concentration in consideration of the chlorine consumption characteristic by the ultraviolet irradiation amount; And
e-5) Estimation of the target ultraviolet irradiation amount and chlorine injection amount
And a method for controlling the intensity of ultraviolet light using the chlorine-ultraviolet complex oxidation water treatment apparatus. The method according to claim 6,
Evaluating the disinfection byproduct by changing the ultraviolet irradiation amount when the target value / evaluation value is not greater than 1.0 in the step f) and calculating the ultraviolet irradiation amount and chlorine when the target value / evaluation value is larger than 1.0, - Variable Chlorine Injection Amount and Ultraviolet Intensity Control Using Ultraviolet Complex Oxidation Water Treatment System. The method according to claim 6,
When the ultraviolet disinfection mode operation is selected in the step c), the inactivation rate of the microorganism to be removed is input in the state where chlorine is not added to the front end of the ultraviolet ray reactor, microbial inactivation by ultraviolet light and chlorine is respectively calculated, Wherein the control unit determines whether the value / current value is greater than 1.0, and changes the ultraviolet ray irradiation amount when the target value / current value is not greater than 1.0. The chlorine injection amount and the ultraviolet intensity variable control method using the chlorine- .

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