KR20140130956A - Waste-water Treatment Apparatus - Google Patents

Waste-water Treatment Apparatus Download PDF

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Publication number
KR20140130956A
KR20140130956A KR1020130049597A KR20130049597A KR20140130956A KR 20140130956 A KR20140130956 A KR 20140130956A KR 1020130049597 A KR1020130049597 A KR 1020130049597A KR 20130049597 A KR20130049597 A KR 20130049597A KR 20140130956 A KR20140130956 A KR 20140130956A
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South Korea
Prior art keywords
treatment tank
microwave
water
primary
waveguide
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KR1020130049597A
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Korean (ko)
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김영준
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김영준
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Priority to KR1020130049597A priority Critical patent/KR20140130956A/en
Publication of KR20140130956A publication Critical patent/KR20140130956A/en

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    • 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
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • 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

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

Abstract

Disclosed is a water treatment system comprising a first treatment container which has a granular activated carbon accommodated therein to be able to flow by a fluid, and an inlet for waste water and an outlet unit for treatment water; a second treatment container which has a TiO_2 membrane inside for screening non-biodegradable substances and low concentration organic substances from first treatment water processed in the first treatment container; a microwave supplying device which supplies microwaves to the first treatment container and the second treatment container and then decomposes organic substances; an electrode-free discharge lamp which is installed inside the second treatment container and helps generate an OH radical in the TiO_2 membrane; and an untreated water return unit which re-supplies untreated waste water from the second treatment container to the first treatment container.

Description

[0001] WATER-WATER TREATMENT APPARATUS [0002]

The present invention relates to a water treatment system for treating concentrated water generated when wastewater and sewage-treated water are reused, and more particularly, to a system for treating water by using activated carbon and a TiO 2 membrane step by step.

Reverse Osmosis (RO) membranes are applied in the field of reuse of wastewater treatment water and industrial water using industrial wastewater, and they are being actively studied at home and abroad. It is developing.

Concentration of RO is inevitably generated at the reuse facility using RO membranes, and it is necessary to perform appropriate treatment to remove high concentration of nutrients (nitrogen, phosphorus), high salt and refractory organic matter.

One of the biggest problems of wastewater and other similar processes applying reverse osmosis membranes to date is the disposal of concentrated water, which is limited by the relatively heavy burdens such as heat evaporation or return to the pre-reverse osmosis membrane process, A treatment process is required.

When discharged without treating concentrated water containing high concentrations of refractory and organic matter, high salt concentrations and harmful substances may affect ecosystem and environment. These effects can vary depending on factors such as the characteristics of the water system, the characteristics of the concentrated water, the discharge rate, and the discharge pressure.

Although many studies have not yet been conducted on the environmental impact of the concentrated water, the data reported so far suggest that there may be a variety of adverse effects, and in particular, , "Sea desert" can be formed. In addition, the composition of marine organisms affected by salt concentration can be changed.

Concentrated water with a high salt concentration can increase turbulence and interfere with photosynthesis, leading to the death of plankton. In some cases, bactericides and the like are contained in the concentrated water, which also affects the marine environment.

Disposal of concentrated water on the ground can affect soil or groundwater, especially the various components contained in the concentrated water, which may contaminate groundwater or alter soil characteristics.

To remove contaminants from concentrated water, there are chemical oxidation methods and biological treatment methods. The chemical oxidation method is particularly suitable for the removal of trace harmful organic matter, but it is not economical due to high cost. The biological treatment method can treat organic matter or nutrients at a low cost, but it is affected by salts or other harmful substances in concentrated water, There is a problem in that it may be lowered.

As a specific technique, an example of an additional process for existing concentrated water treatment is disclosed in Korean Patent Registration No. 10-0550976 (sewage effluent treatment system and treatment method). In this patent document, there is a problem in that an activated carbon adsorption facility is used to remove contaminants in the concentrated water, a separate facility for regenerating activated carbon is required, and the by-products generated during the regeneration must be reprocessed again.

In addition, when the membrane is used, the fouling proceeds quickly, resulting in a reduction in processing efficiency and economical efficiency due to excessive membrane replacement cost.

The present invention in as been made in view of the points described above, the organic material also microwave absorption of microwave irradiation on activated carbon fluidized bed reactor to decompose and remove the organic substance adsorbed to the activated carbon without regeneration of the separate activated carbon, and TiO 2 membrane And to provide a water treatment system improved in structure so that fouling can be suppressed.

According to an aspect of the present invention, there is provided a water treatment system comprising: a primary treatment tank having a wastewater inlet and a treated water discharge portion, the granular activated carbon being fluidly accommodated therein; A secondary treatment tank in which a TiO 2 membrane for filtering out low-concentration organic matter and refractory substances in the primary treatment water treated in the primary treatment tank is installed inside; A microwave supply device for supplying microwaves to the primary treatment tank and the secondary treatment tank to decompose organic matter; And an electrodeless discharge lamp installed inside the secondary treatment tank to assist OH radical generation in the TiO 2 membrane; And an untreated water conveying unit for re-supplying unprocessed wastewater into the primary treatment tank in the secondary treatment tank.

The apparatus may further include a heat exchanger for exchanging heat between the primary treated water and the incoming raw water to the primary treatment tank to raise the temperature of the raw water.

The microwave apparatus may further include: a first microwave supply unit for generating first and second microwaves in different frequency bands and supplying the first and second microwaves to the first treatment tank; And a second microwave supply unit for generating a third microwave in the same frequency band as the first microwave and supplying the generated third microwave to the secondary treatment tank.

The first microwave supply unit may include: a first microwave generator for generating a microwave; A first waveguide for transmitting the microwave generated from the first microwave generator to the inside of the first treatment bath; A second waveguide for transmitting the microwave generated from the first microwave generator to the outside of the first treatment tank; And a first fluorocarbon resin pipe installed in the first treatment tank so as to irradiate the microwave transferred through the first waveguide in the first treatment tank.

The apparatus may further include an outer housing installed to surround the outside of the first treatment tank, wherein the second waveguide is connected to irradiate a microwave to a space between the outer housing and the first treatment tank, It is preferable that the tank is made of a fluororesin material.

The first microwave supply unit may further include a reflection weight provided inside the first fluororesin pipe to diffuse and reflect the irradiated microwave.

The second microwave supply unit may include: a second microwave generator for generating the third microwave; A third waveguide for transmitting the microwave generated from the second microwave generator to the secondary treatment tank; And a second fluorocarbon resin pipe installed in the second treatment tank and irradiating the microwave transferred through the third waveguide into the second treatment tank.

The apparatus may further include a fine bubble supplying unit for supplying fine bubbles into the primary treatment vessel to increase the flow of the granular activated carbon by the fine bubbles and the adsorption action.

The apparatus may further include a circulation unit for circulating a part of the treated water discharged to the treated water discharge portion of the primary treatment tank to the raw water inlet of the primary treatment tank.

According to the water treatment system of the present invention, by introducing this system into sewage treatment water production process and other membrane process, it is possible to increase the recovery time of production water during operation and reduce the membrane fouling phenomenon by organic substances, And ultimately, the membrane fouling phenomenon can be suppressed.

In addition, organic matter adsorbed only by microwaves can be decomposed and removed without a separate regeneration process of the activated carbon process for removing the high concentration organic material, so that it can be used for a long time without replacement of activated carbon, thereby reducing the cost of replacing activated carbon. So that continuous operation becomes possible.

In addition, it is possible to increase the processing efficiency by microwaves, thereby securing competitive power in terms of economy.

1 is a schematic diagram showing a water treatment system according to an embodiment of the present invention.

Hereinafter, a water treatment system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1, a water treatment system 10 according to an embodiment of the present invention includes a first treatment tank 100, a second treatment tank 200, and first and second treatment tanks 100 and 200 A microwave supply device 110 for supplying microwaves to decompose the organic material and an electrodeless discharge lamp 220 installed to assist OH radical generation in the TiO 2 membrane 210 installed in the secondary treatment tank 200 And an untreated conveying unit 230 for re-supplying untreated wastewater from the secondary treatment tank 200 to the primary treatment tank 100.

The primary treatment tank 100 is composed of a fluidized bed reaction tank in which granular activated carbon 20 is used as a catalyst to remove high concentrations of organic substances (nitrogen and phosphorus) contained in the influent wastewater and concentrated water. The organic matter contained in the wastewater is adsorbed to the granular activated carbon 20 fluidly accommodated in the primary treatment tank 100 and the organic matter adsorbed on the granular activated carbon 20 is supplied from the microwave supply device 110 to be irradiated It is decomposed and processed by microwave. Therefore, as will be described later, it is possible to suppress the deterioration of the function of the granular activated carbon 20 and to prolong its service life.

The primary treatment tank 100 has an annular cylindrical structure and is provided with a treatment water discharge portion 102 through which wastewater to be treated flows through the wastewater inlet portion 101 at one end and wastewater is discharged at the other end . The wastewater inflow section 101 is provided with a raw water (wastewater) inlet 101a, a treated water recovery inlet 101b and a fine bubble inlet 101c.

The raw water inlet 101a is connected to a raw water supply path 30 to supply raw water (wastewater), and a supply pump 31 may be installed on the raw water supply path 30.

The treated water discharging portion 102 has a first volleyball 102a and a second discharge port 102b. A part of the treated water discharged to the treated water discharging portion 102 is supplied to the secondary treatment tank 200 through the treated water supplying path 103 and the remaining is supplied to the waste water inflow portion 101 through the circulating unit 150. [ And then processed again.

The circulation unit 150 includes a circulation path 151 for connecting the second discharge port 102b and the process water recovery inlet 101b and a circulation pump 153 installed in the circulation path 151.

Here, zeolite may be added to the interior of the primary treatment tank 100 to treat ammonia nitrogen according to the characteristics and concentration of wastewater. That is, wastewater can be treated using various catalysts depending on the characteristics and concentration of wastewater.

Further, an outer housing 116 is further installed to surround the outside of the primary treatment tank 100. The outer housing 116 is installed to have a certain space between itself and the primary treatment tank 100.

A first fluorine resin pipe 115, which will be described later, is provided inside the first treatment tank 100 to irradiate microwaves into the first treatment tank 100. The first fluorocarbon resin pipe 115 is preferably provided with a reflection weight 117 which diffuses and reflects the irradiated microwaves, and may be installed on the opposite end side corresponding to the transmission entrance of the microwave.

Also, the primary treatment tank 100 is preferably made of a fluororesin material.

The secondary treatment tank 200 is a secondary treatment tank for receiving the treated water subjected to primary treatment in the primary treatment tank 100 and for treating the treated water in the secondary treatment tank 200. The treatment tank inflow section 201, And an untreated water discharging portion 203. The treatment tank inflow section 201 is connected to the first discharge port 102a of the first treatment tank 100 through the treatment water discharge path 103 and receives treated water treated first.

The secondary treatment tank 200 is a reaction tank for treatment using the microwave supply device 110, the electrodeless discharge lamp 220 and the TiO 2 membrane 210 and is treated and discharged in the primary treatment tank 100 Low concentration organic matter and refractory substances contained in the low concentration wastewater and concentrated water are introduced into the TiO 2 membrane reaction tank and subjected to a treatment process in which they are oxidized and filtered through the TiO 2 membrane 210 by microwave irradiation and UV- do.

The electrodeless discharge lamp 220 is installed inside the second fluorocarbon resin pipe 121 installed in the secondary treatment tank 200. Electrode discharge lamp 220 can be protected from wastewater by allowing the wastewater to come into contact with the outside of the second fluorine resin pipe 121 and the electrodeless discharge lamp 220 can be protected from OH radicals in the TiO 2 membrane 210 It is possible to suppress the fouling of the TiO 2 membrane 210 by helping curl formation. That is, if the electrodeless discharge lamp 220 is installed inside the second fluororesin pipe 121, the second fluororesin pipe 121 having a relatively small amount of impurities such as foreign substances, 220 can be protected so that a uniform microwave UV-vis irradiation can be achieved.

Since the electrodeless discharge lamp 220 is a structure that can be easily understood from the known art, a detailed description thereof will be omitted.

The TiO 2 membrane 210 may be branched into a plurality of pipe structures within the secondary treatment tank 200 and may be combined with the treatment water discharge unit 202 outside the secondary treatment tank 200, 221). The TiO 2 membrane 210 may be variously selected depending on the type and concentration of contaminants to be treated, such as an ultrafiltration membrane, a microfiltration membrane, a nanofiltration membrane, and the like. Can be applied.

The untreated untreated water in the secondary treatment tank 200 can be re-supplied to the primary treatment tank 100 by the untreated transport unit 230 and processed. That is, the untreated transport unit 150 re-supplies the untreated wastewater to the primary treatment tank 100 by the residence time delay due to the increase in the concentration of the contaminant in the secondary treatment tank 200 . The untreated transport unit 230 includes an untreated transport path 231 for connecting the untreated water discharge section 203 and the raw water supply path 30 and a transport pump 233 provided on the untreated transport path 231 do.

The microwave supplying apparatus 110 includes a first microwave supplying unit 111 for generating and supplying a first microwave (2,450 ± 100 MHz) and a second microwave (915 ± 100 MHz) And a second microwave supply part 118 for supplying the microwave.

The first microwave supply unit 111 includes a first microwave generator 112 for generating a first microwave and a second microwave and a microwave generator for generating a microwave generated from the first microwave generator 112 into the first treatment tank 100 A second waveguide 114 for transmitting a microwave to the outside of the first treatment tank 100, a microwave transmitted through the first waveguide 113 to a first treatment tank The first fluorocarbon resin pipe 115 and the reflection weight 117 installed in the first treatment tank 100 and the first fluorocarbon resin pipe 115 are disposed inside the first treatment tank 100 to irradiate the inside of the first fluorocarbon resin pipe 100.

Here, the second waveguide 114 is connected to irradiate the microwave to the space between the outer housing 116 and the first treatment tank 100, and microwaves are effectively introduced into the first treatment tank 100 through the outside of the first treatment tank 100 It is preferable that the first treatment tank 100 is made of a fluororesin material.

The connection position of the second waveguide 114 may be variously applied, and a plurality of microwaves may be provided to irradiate microwaves to the outside of the first treatment tank 100 at a plurality of points.

By irradiating the microwave from the inside and the outside of the first treatment tank 100, microwave can be sufficiently absorbed to the granular activated carbon 20 and the wastewater, and the fluororesin material with less impurities adheres to the first treatment tank The first fluororesin pipe 115 and the first fluororesin pipe 115 are formed so that uniform microwave irradiation can be performed. Further, by providing the reflection weight 117 on the opposite side of the entrance to the microwave, it is possible to reflect the microwave and irradiate it more uniformly.

The second microwave supply unit 118 includes a second microwave generator 119 for generating a third microwave and a third waveguide for transmitting the third microwave generated from the second microwave generator 119 to the second treatment tank 200. [ A second fluorine resin pipe 121 installed inside the second treatment tank 200 and irradiating the microwave transferred through the third waveguide 120 into the second treatment tank 200, Respectively.

Further, it is preferable to further include a fine bubble supplying unit (140) for injecting fine bubbles into the primary treatment tank (100). The minute bubble supplying unit 140 may be variously configured to selectively inject air, oxygen, ozone gas, or the like depending on the type of wastewater. When fine bubbles are supplied into the first treatment tank 100 through the fine bubble supplying unit 140, particulate organic matter or decomposition products attached to the granular activated carbon 20 are flowed through the fine bubbles to be desorbed And the organic matter is decomposed by the oxidizing power possessed by oxygen, so that the treatment efficiency of the high concentration organic matter can be improved and the refractory substance can be effectively treated through the high oxidation action of ozone through the ozone gas injection.

Further, it is preferable to further include a heat exchanger 130 for exchanging heat between the temperature of the primary treatment water supplied through the treated water supply path 103 and the raw water introduced through the raw water supply path 30. Since the heat exchanger 130 exchanges the heat of the first treated water having a high temperature and the inflow water having a relatively low temperature, which are generated when the organic matter is decomposed by the microwave irradiation, It is possible to increase the efficiency of the wastewater treatment in the first treatment tank 100 by increasing the half-depth depth of the microwave.

1, reference numerals 105 and 205 respectively denote waste gas generated during the water treatment process in each of the first treatment tank 100 and the second treatment tank 200 and a gas discharge port for discharging air, respectively.

As described above, according to the water treatment system 100 according to the embodiment of the present invention, for the treatment of wastewater containing high-concentration organic substances and refractory substances and concentrated water, the first treatment tank 100 and the second treatment (200) in a stepwise manner.

In the first treatment tank 100, the organic activated carbon 10 having the fluidity can be adsorbed and treated through the activated carbon 10, and the activated carbon 10 having the organic substance adsorbed through the microwave irradiation can be used without any regeneration process .

In the secondary treatment tank 200, the residual organic material and the refractory material can be effectively removed through the TiO 2 membrane 210, the microwave irradiation and the electrodeless discharge lamp 220, and in particular, the TiO 2 membrane 210, The organic substances adhering to the surface are decomposed and removed by microwave irradiation, and ultimately membrane fouling can be suppressed, and the membrane replacement period and the life span can be prolonged, and the maintenance cost can be drastically reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Those skilled in the art will readily appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

10 .. Water Treatment System 100. 1.
110. Microwave supply device 130. Heat exchanger
111 .. First microwave supply device 118 .. Second microwave supply device
112. First microwave generator 113. First waveguide
114 .. second waveguide 115 .. first fluoropolymer pipe
116 .. Outer housing 117 .. Reflective weight
118. Second microwave supply device 119. Second microwave generator
120 .. Third waveguide 121 .. Second fluoropolymer pipe
140 .. Fine bubble supplying unit 150 .. Circulating unit
200. Second treatment tank 210. TiO 2 membrane
220 .. Electrode discharge lamp 230 .. Untreated water conveying unit

Claims (9)

A primary treatment tank in which granular activated carbon is fluidly accommodated in the interior thereof and has a waste water inlet and a treated water discharge portion;
A secondary treatment tank in which a TiO 2 membrane for filtering out low-concentration organic matter and refractory substances in the primary treatment water treated in the primary treatment tank is installed inside;
A microwave supply device for supplying microwaves to the primary treatment tank and the secondary treatment tank to decompose organic matter; And
An electrodeless discharge lamp installed inside the secondary treatment tank to assist OH radical generation in the TiO 2 membrane;
And an untreated water transfer unit for supplying the untreated wastewater into the primary treatment tank again in the secondary treatment tank. The method according to claim 1,
And a heat exchanger for exchanging heat between the primary treated water and the incoming raw water to the primary treatment tank to raise the temperature of the raw water. The microwave apparatus according to claim 1,
A first microwave supply unit for generating first and second microwaves in different frequency bands and supplying the generated first and second microwaves to the first treatment tank; And
And a second microwave supply unit for generating a third microwave having the same frequency band as that of the first microwave and supplying the third microwave to the secondary treatment tank. The microwave oven according to claim 3,
A first microwave generator for generating microwaves;
A first waveguide for transmitting the microwave generated from the first microwave generator to the inside of the first treatment bath;
A second waveguide for transmitting the microwave generated from the first microwave generator to the outside of the first treatment tank;
And a first fluorocarbon resin pipe installed in the first treatment tank so as to irradiate the microwave transferred through the first waveguide in the first treatment tank. 5. The method of claim 4,
Further comprising an outer housing installed to surround the outside of the primary treatment tank,
The second waveguide is connected to radiate microwaves into a space between the outer housing and the primary treatment tank,
Wherein the first treatment tank is made of a fluororesin material. The microwave oven according to claim 4,
Further comprising a reflection weight installed inside the first fluororesin pipe to diffuse and reflect the irradiated microwave. The microwave oven according to claim 3,
A second microwave generator for generating the third microwave;
A third waveguide for transmitting the microwave generated from the second microwave generator to the secondary treatment tank;
And a second fluorine resin pipe installed in the second treatment tank and irradiating the microwave transferred through the third waveguide into the second treatment tank. 8. The method according to any one of claims 1 to 7,
Further comprising a fine bubble supplying unit for supplying fine bubbles to the inside of the primary treatment tank to increase flow and adsorption of granular activated carbon by fine bubbles. 8. The method according to any one of claims 1 to 7,
Further comprising a circulation unit for circulating a part of the treated water discharged to the treated water discharge portion of the primary treatment tank to the raw water inlet of the primary treatment tank.
KR1020130049597A 2013-05-02 2013-05-02 Waste-water Treatment Apparatus KR20140130956A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104925889A (en) * 2015-05-12 2015-09-23 南京大学 Bobbin type device for degrading triclocarban (TCC) in water by virtue of dielectric barrier discharge coordinated with activated carbon fiber and method of device
KR102287375B1 (en) * 2020-12-11 2021-08-06 주식회사 위젠트 Filtering Device used a Fine Air Bubble Genertator
US11485658B2 (en) 2019-04-26 2022-11-01 Doosan Enerbility Co., Ltd. Water treatment apparatus including underwater plasma discharge module

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104925889A (en) * 2015-05-12 2015-09-23 南京大学 Bobbin type device for degrading triclocarban (TCC) in water by virtue of dielectric barrier discharge coordinated with activated carbon fiber and method of device
US11485658B2 (en) 2019-04-26 2022-11-01 Doosan Enerbility Co., Ltd. Water treatment apparatus including underwater plasma discharge module
KR102287375B1 (en) * 2020-12-11 2021-08-06 주식회사 위젠트 Filtering Device used a Fine Air Bubble Genertator

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